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JP2006333441

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2006333441
The present invention provides an electroacoustic transducer which can obtain a good point
source with nondirectionality. A multi-faced diaphragm assembly 11A is formed into a
substantially spherical shell shape by including a diaphragm 11 in which a plurality of regular
pentagonal diaphragm segments 12 are joined, and on the inner surface side of the multi-faced
diaphragm assembly 11A. A plurality of speaker drive units 20A are disposed to face each
diaphragm segment 12, and one end 24a of each bobbin 24 of each speaker drive unit 2OD is
bonded to a central portion of the inner surface of each diaphragm segment 12 When the
converter 10D is configured, a plurality of speaker mounts composed of the polygonal pyramid
52 or the polygonal frustum 52A in which the surface facing the diaphragm segment 12 is the
polygonal surface 52a are combined in a substantially spherical shape, The speaker drive unit
20D is attached to the square surface 52a, and the multi-faced mount assembly 51 is housed in
the multi-faced diaphragm assembly 11A. To provide an electroacoustic transducer 10D that.
[Selected figure] Figure 3
Electro-acoustic transducer
[0001]
According to the present invention, there is provided a multi-faced diaphragm assembly formed
in a substantially spherical shape including a diaphragm in which a plurality of polygonal
diaphragm segments are joined, and each diaphragm on the inner surface side of this multi-faced
diaphragm assembly. The present invention relates to an electro-acoustic transducer including a
plurality of speaker driving units disposed to face a segment.
[0002]
12-05-2019
1
Although an electroacoustic transducer (speaker) for amplifying a voice signal has various
structural forms, as an example of this type of electroacoustic transducer, a reproduction sound
vibrating near a breathing sphere is given to human auditory sense. There is a point sound
source non-directional speaker system (see, for example, Patent Document 1).
[0003]
The above-mentioned breathing ball is a sounding body which is considered as an ideal nondirectional speaker, and generates, for example, substantially the same sound pressure in all
directions as in the case of a balloon ballooning or squeezing vibration. It is completely
omnidirectional and is named as a respiratory sphere because it resembles a sphere breathing.
Unexamined-Japanese-Patent No. 9-70092.
[0004]
FIG. 28 is a perspective view showing an example of a conventional point sound source nondirectional speaker system, FIG. 29 is a block diagram showing an example of a conventional
point sound source non-directional speaker system, and FIG. It is the characteristic view which
showed typically the example of the peak and dip of the frequency response in the speaker unit
used for the sound source * omnidirectional * speaker system.
[0005]
The conventional point sound source non-directional speaker system 100 shown in FIG. 28 and
FIG. 29 is disclosed in the above-mentioned Patent Document 1 (Japanese Patent Application
Laid-Open No. 9-70092). A brief description is given with reference to.
[0006]
As shown in FIG. 28, in the conventional point sound source nondirectional speaker system 100,
a rigid hollow spherical enclosure 101 has twelve first surfaces 101a formed in a pentagonal
shape on its outer peripheral surface. And 20 second faces 101 b formed of hexagons to form a
polyhedron having a total of 32 faces.
12-05-2019
2
The enclosure 101 described above corresponds to a speaker cabinet or a speaker box.
[0007]
At this time, as shown in FIG. 28, an example in which the speaker units 102 of the full range are
respectively attached to the first surfaces 101a and the second surfaces 101b of the enclosure
101 is disclosed.
[0008]
Further, unlike the above example, as shown in FIG. 29, the speaker units 103 for the low
frequency range are attached to the respective first surfaces 101a of the enclosure 101, and the
high frequency regions are provided for the respective second surfaces 101b. An example of
attaching the speaker units 104 is also disclosed.
[0009]
Further, in FIG. 29, 110 is a digital input signal, 111 is a digital signal processor (DSP), 112 is an
operation panel attached to the DSP 111, 113 is a D / A converter, 114 is an analog attenuator,
115 is a power amplifier The digital input signal 110 passes through the DSP 111, the D / A
converter 113, the analog attenuator 114, and the power amplifier 115 in this order and is
supplied to the speaker units 102 or the speaker units 103 and 104.
[0010]
Here, when the speaker unit in which the speaker unit 102 for the full range or the speaker unit
103 for the low frequency range and the speaker unit 104 for the high frequency range are
respectively arranged in a polyhedron consisting of 32 surfaces of the enclosure 101 is driven as
it is As schematically shown in FIG. 30, since peak P and dip D occur in the frequency response,
the drive signals of the respective speaker units 102 or the speaker units 103 and 104 are
shown in FIG. The DSP 111 shown performs filtering of the inverse characteristic to the dip D,
and thereafter converts the digital signal into an analog signal by the D / A converter 113, and
sequentially transmits each speaker unit 102 through the analog attenuator 114 and the power
amplifier 115. Or each speaker unit 103, 104 Effect that has been supplied have been disclosed.
[0011]
By the way, in the above-described conventional point sound source nondirectional speaker
system 100, as described above, the speaker unit 102 for full range or the speaker unit 103 for
the low frequency band and the high region are included in the polyhedron consisting of 32
surfaces of the enclosure 101. Although the speaker units 104 for the sound range are disposed
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3
respectively, the respective unique diaphragms (not shown) integrally attached to the respective
speaker units 102 or the speaker units 103 and 104 are vibrated respectively. It is clear that we
are getting the playback sound.
[0012]
In this case, since a part of the enclosure 101 having rigidity is interposed between the adjacent
speaker units without the diaphragm being interposed, it is possible to use the speaker units 102
or the speaker units 103 and 104 described above. In some cases, a synthesized reproduced
sound obtained by synthesizing each reproduced sound of can not be obtained as a good point
sound source.
[0013]
Further, as described above with reference to FIG. 30, although the DSP 111 inversely corrects
the dip D generated in the frequency response of each reproduction sound obtained by each
speaker unit 102 or each speaker unit 103 and 104, It is obvious that if the generation of the dip
D itself can be reduced as much as possible by the structural form of the speaker unit, the
reverse correction by the DSP 111 can also be reduced.
[0014]
Therefore, a good point sound source with nondirectionality can be obtained as a breathing
sphere, and dips occurring in the frequency response of each reproduced sound obtained by a
plurality of speakers can be reduced, and a plurality of polygonal diaphragm segments can be
obtained. A multi-faced diaphragm assembly is formed in a substantially spherical shell shape
including individually joined diaphragms, and a plurality of speaker drive units are disposed on
the inner surface side of this multi-faced diaphragm assembly so as to face each diaphragm
segment. At that time, an electro-acoustic transducer is desired that has a structural form in
which a plurality of speaker drive units can be assembled three-dimensionally radially with high
productivity while facing the respective diaphragm segments.
[0015]
The present invention has been made in view of the above problems, and the invention according
to claim 1 is an electroacoustic transducer including a diaphragm in which a plurality of
polygonal diaphragm segments are joined to form a substantially spherical shell shape. A multifaceted diaphragm assembly, a speaker housing, a bobbin swingably supported by the speaker
housing and having one end adhered to a central portion of the inner surface of the diaphragm
segment, and the other end of the bobbin A plurality of voice coils attached to the plurality of
yokes and a yoke and a magnet for generating a driving force to the voice coils, the plurality
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4
being disposed to face the diaphragm segments on the inner surface side of the multifaceted
diaphragm assembly. A plurality of speaker mounting units, and a plurality of speaker mounts
each including a polygonal pyramid or a polygonal frustum whose surface facing the diaphragm
segment is a polygonal surface. An electro-acoustic transducer comprising: a multi-faced mount
assembly in which the speaker drive unit is attached to each of the polygonal surfaces and is
housed within the multi-faced diaphragm assembly. is there.
[0016]
The invention according to claim 2 relates to the electro-acoustic transducer according to claim
1, wherein in the multiplanar mount assembly, the outer peripheral side surfaces of the
respective speaker mounts are joined by concavo-convex fitting. It is an electroacoustic
transducer that is characterized.
[0017]
The invention according to claim 3 is the electro-acoustic transducer according to claim 1 or 2,
wherein at least one pedestal having the same outer shape as the diaphragm segment is formed
in a part of the multifaceted diaphragm assembly. The electro-acoustic transducer is
characterized in that the multi-faced diaphragm assembly is formed in a substantially spherical
shell shape by including.
[0018]
The invention according to claim 4 relates to the electro-acoustic transducer according to claim
3, wherein the multiplanar mount assembly includes at least one support having substantially the
same shape as the speaker mount. And the support base is opposed to the base, and at least one
pipe member is provided for passing the wiring of each of the speaker drive units, and the pipe
member is fixed to the support base at one end. And an electro-acoustic transducer characterized
in that the through hole formed in the pedestal is adhered to the pedestal.
[0019]
The invention according to claim 5 is the electro-acoustic transducer according to claim 1 or 2,
wherein the multi-faceted diaphragm assembly is formed in a substantially spherical shell shape
only with the diaphragm, and A pipe insertion hole is provided at a central portion of at least one
of the diaphragm segments in the diaphragm, and at least one pipe member for passing a wire of
each of the speaker drive units is provided, and the pipe member is the pipe insertion The
electro-acoustic transducer is characterized in that it is inserted into the hole and supported at
one end by the speaker driving unit.
12-05-2019
5
[0020]
The invention according to claim 6 relates to the electro-acoustic transducer according to claim 1
or 2, wherein the multi-faceted diaphragm assembly is formed substantially in a spherical shell
shape only with the diaphragm, and A pipe insertion hole is provided at a central portion of at
least one of the diaphragm segments in the diaphragm, and at least one pipe member for passing
a wire of each of the speaker drive units is provided, and the pipe member is the pipe insertion
The electro-acoustic transducer is characterized in that it is inserted into the hole and one end
thereof is supported by the speaker mount on which the center portion of the speaker drive unit
is inserted and the speaker drive unit is attached.
[0021]
The invention according to claim 7 is the electro-acoustic transducer according to any one of
claims 1 to 6, wherein an inner surface side of each of the diaphragm segments constituting the
multifaceted diaphragm assembly is provided. According to another aspect of the present
invention, there is provided an electro-acoustic transducer including a plurality of diaphragm
connecting members for connecting the joint portions of each side and the speaker mounts
constituting the multiplanar mount assembly.
[0022]
Furthermore, the invention according to claim 8 is characterized in that, in the electroacoustic
transducer according to claim 7, the diaphragm connection member has a flexibility higher than
that of the diaphragm segment. It is an electroacoustic transducer.
[0023]
According to the electro-acoustic transducer of the present invention, a multi-faced diaphragm
assembly is formed in a substantially spherical shell shape by including a diaphragm in which a
plurality of polygonal diaphragm segments are connected, and this multi-face diaphragm
assembly A plurality of speaker drive units are disposed on the inner surface side of the solid so
as to face each diaphragm segment, and one end of each bobbin of each speaker drive unit is
bonded to the central portion of the inner surface of each diaphragm segment to perform
electroacoustic conversion. When the speaker assembly is configured, a plurality of speaker
mounts consisting of polygon pyramids or polygon pyramids whose faces facing the diaphragm
segments are polygon faces are coupled in a substantially spherical shape, and the speaker drive
unit is mounted on each polygon face The multi-faced mount assembly is mounted in the multifaced diaphragm assembly, so that it has non-directivity as a breathing sphere by a diaphragm in
12-05-2019
6
which a plurality of polygonal diaphragm segments are joined. Good point sound source is
obtained, and, dips can be reduced resulting in a frequency response of each reproduced sound
obtained by the vibration of the vibrating plate segment.
Furthermore, when mass-producing the electroacoustic transducers, a large number of speaker
driving units are prepared in a state in which one speaker driving unit is attached to the central
portion of the upper surface of one speaker mount (polygon pyramid or polygon pyramid), By
combining a plurality of speaker mounts attached to each other to assemble a multi-faced mount
assembly, it is possible to contribute to the improvement of the productivity of the
electroacoustic transducer.
[0024]
Further, according to the electro-acoustic transducer of the second aspect, since the outer
peripheral side surfaces of the speaker mounts are joined by the concavo-convex fitting, the
polyhedral mount assembly is positioned in the multiplanar mount assembly. It can be assembled
with high accuracy.
[0025]
Further, according to the electro-acoustic transducer of the third aspect, by including at least one
pedestal having the same outer shape as the diaphragm segment in a part of the polyhedral
diaphragm assembly, the polyhedral diaphragm assembly is substantially formed. Since it is
formed in a spherical shell shape, at least one pedestal can support a diaphragm in which a
plurality of polygonal diaphragm segments are joined, and at least one pedestal functions as the
bottom of the electroacoustic transducer In addition, it is also necessary when connecting a
plurality of electroacoustic transducers.
[0026]
Further, according to the electro-acoustic transducer of the fourth aspect, the multiplanar mount
assembly is approximately spherically coupled including at least one support having substantially
the same shape as the speaker mount, and the support Is opposite to the pedestal and comprises
at least one pipe member for passing the wiring of each speaker drive unit, and the pipe member
is fixed at one end to the support and passed through a through hole formed in the pedestal
Since it is bonded to the pedestal, at least one pedestal can support a diaphragm in which a
plurality of polygonal diaphragm segments are joined, and a pipe member leads the lead wire of
each voice coil provided in each speaker drive unit It can be extracted externally, can support at
least one electroacoustic transducer, and can also be connected to a plurality of electroacoustic
transducers.
12-05-2019
7
[0027]
Further, according to the electro-acoustic transducer of the fifth aspect, the multi-faceted
diaphragm assembly is formed substantially in a spherical shell shape only with the diaphragm,
and a central portion of at least one diaphragm segment in the diaphragm. Has at least one pipe
member for passing the wiring of each speaker drive unit, the pipe member is inserted into the
pipe insertion hole, and one end is supported by the speaker drive unit Therefore, each
diaphragm segment provided on all the surfaces in the multifaceted diaphragm assembly can be
vibrated, and the vibration characteristic of the diaphragm connecting all the diaphragm
segments can be further improved, and the pipe member can be used. The lead wire of each
voice coil provided in each speaker drive unit can be drawn out, and at least one electroacoustic
transducer can be supported. It may also be coupled a plurality of electro-acoustic transducer.
[0028]
Further, according to the electro-acoustic transducer of the sixth aspect, the multi-faceted
diaphragm assembly is formed substantially in a spherical shell shape only with the diaphragm,
and a central portion of at least one diaphragm segment in the diaphragm. Has at least one pipe
member for passing the wiring of each speaker drive unit, the pipe member is inserted into the
pipe insertion hole, and one end portion is inserted through the central portion of the speaker
drive unit And the speaker mounting unit to which the speaker drive unit is attached, so that
each diaphragm segment provided on all the faces in the multi-faced diaphragm assembly can be
vibrated, and the vibration in which all the diaphragm segments are connected It is possible to
further improve the vibration characteristics of the plate and to draw out the lead wire of each
voice coil provided in each speaker drive unit by the pipe member to the outside Come, and can
support at least one electroacoustic transducer, it is also possible to connect the plurality of
electro-acoustic transducer.
[0029]
Further, according to the electro-acoustic transducer of the seventh aspect, the joint portion of
each side of the inner surface side of each diaphragm segment constituting the multifaceted
diaphragm assembly and each speaker constituting the multifaceted mounting assembly Since a
plurality of diaphragm connection members for connecting with the mounting base is provided,
each edge member in the multifaceted diaphragm assembly is formed of a soft member when the
multifaceted diaphragm assembly is relatively large. Even in this case, good acoustic
characteristics can be obtained because deformation of each diaphragm segment itself in the
multifaceted diaphragm assembly does not occur due to its own weight.
12-05-2019
8
[0030]
Furthermore, according to the electro-acoustic transducer of the eighth aspect, since the
flexibility is greater than the flexibility of the diaphragm segment, the diaphragm segment is
supported without affecting the vibration of the diaphragm segment. can do.
[0031]
Hereinafter, an embodiment of an electroacoustic transducer according to the present invention
will be described in detail in the order of Embodiments 1 to 6 with reference to FIGS.
[0032]
In the electro-acoustic transducer according to the present invention, a multi-faceted diaphragm
assembly is formed in a substantially spherical shell shape including a diaphragm in which a
plurality of polygonal diaphragm segments are joined, and the inner surface of this multi-face
diaphragm assembly A plurality of speaker drive units are arranged radially in a threedimensional manner facing each diaphragm segment on the side.
[0033]
The following first, second, fourth, and fifth embodiments show an example in which a polygonal
diaphragm segment is formed into, for example, a regular pentagon, and a diaphragm including a
plurality of regular pentagonal diaphragm segments joined together is substantially attached. The
following description is given of the case where the diaphragm is formed to have, for example,
11 regular pentagonal diaphragm segments when forming a polyhedral diaphragm assembly in a
spherical shell shape, but the angular number of the polygonal diaphragm segments is The
present invention is not limited to the above-described pentagonal shape, and it is also possible
to obtain a diaphragm with an appropriate number of faces by using diaphragm segments of an
appropriate number of angles.
[0034]
Further, in the following third and sixth embodiments, an example in which a polygonal
diaphragm segment is formed in, for example, a regular pentagonal shape is shown, and
including a diaphragm in which a plurality of regular pentagonal diaphragm segments are joined,
in a substantially spherical shape In the case of forming the multi-faceted diaphragm assembly,
the diaphragm will be described in the case where the diaphragm segment of a regular pentagon
is formed on all the surfaces of, for example, 12 faces. The number of corners is not limited to
the above-described pentagon, and it is also possible to obtain a diaphragm having diaphragm
segments on all of the faces of the multiface by diaphragm segments of appropriate angles.
12-05-2019
9
[0035]
FIG. 1 is a perspective view of the external shape of the electroacoustic transducer according to
the first embodiment of the present invention as viewed from the front side, and FIG. 2 is the
external shape of the electroacoustic transducer according to the first embodiment of the present
invention as viewed from the bottom side FIG. 3 is a perspective view schematically showing a
schematic configuration of the electro-acoustic transducer of Example 1 according to the present
invention.
[0036]
As shown in FIGS. 1 and 2, the electroacoustic transducer 10A according to the first embodiment
of the present invention includes a diaphragm 11 in which a plurality of diaphragm segments 12
formed in a polygon shape using a resin sheet material or the like. And a plurality of speakers
disposed three-dimensionally radially opposite to each diaphragm segment 12 on the inner
surface side of the multi-faced diaphragm assembly 11A formed into a substantially spherical
shell shape including the multi-faced diaphragm assembly 11A. The driving unit 20A (FIG. 3) is
configured to obtain an omnidirectional point sound source close to the breathing sphere.
[0037]
At this time, as described later, when the above-described diaphragm 11 is formed, a plurality of
polygonal diaphragm segments 12 are planarly developed over a plurality of diaphragm
segments 12, and thereafter, the plurality of diaphragm segments 12 are substantially formed. A
method of forming in a spherical shell shape is adopted, and a plurality of speaker drive units
20A (FIG. 3) disposed opposite to the plurality of diaphragm segments 12 are unitized without
the diaphragm. It is a thing.
[0038]
That is, in the first embodiment, the diaphragm 11 in which eleven diaphragm segments 12
formed in, for example, a regular pentagonal shape are joined using a resin sheet material or the
like, and the diaphragm segments 12 at portions corresponding to the bottom surface of the
diaphragm 11 And a rigid pentagonal base 13 having the same outer shape as the above, and a
plurality of edge portions 12f respectively formed between the adjacent diaphragm segments 12
and a plurality of edge members 14 described below to form a substantially spherical shape. A
multi-faced diaphragm assembly 11A having a total of 12 faces is obtained by combining in a
shell shape.
[0039]
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10
At this time, when connecting the adjacent pentagonal diaphragm segments 12 together and
connecting the regular pentagonal base 13 as the bottom to the adjacent pentagonal diaphragm
segment 12, each side of the regular pentagon that needs to be connected A flexible edge
member 14 made of a rubber material or the like is attached to and joined to each other.
[0040]
Further, as shown in FIG. 2, a through hole 13a is formed at the central portion of the regular
pentagonal base 13, and the wiring / supporting pipe member 15 enters the through hole 13a.
The screw portion (not shown) formed at one end of the pipe member 15 has a substantially
same outer shape as the speaker housing 27 in the multi-faced speaker housing assembly 26
described later and is a support plate (hereinafter referred to as Since it is screwed into and fixed
to a screw hole (not shown) formed in a pentagon plate 28 {FIG. 7 (b)}, eleven speaker drives
attached to the multi-faced speaker housing assembly 26 The wiring wire of the unit 20A is
inserted into the pipe member 15 and can be pulled out to the outside.
[0041]
At this time, by filling the adhesive between the through holes 13 a of the pedestal 13 and the
outer peripheral surface of the pipe member 15, the regular pentagonal pedestal 13 is supported
by the pipe member 15 and has a polyhedral shape consisting of a total of 12 faces. In the
diaphragm assembly 11A, the diaphragm 11 having 11 surfaces is supported on each side of the
regular pentagonal base 13 via the edge members 14.
[0042]
Further, as shown in FIG. 3, the speaker drive unit 20A is opposed to the inner surface side of the
eleven diaphragm segments 12 provided inside the multi-faced diaphragm assembly 11A formed
in a substantially spherical shell shape. Are arranged radially in a three-dimensional manner.
[0043]
The constituent members of the eleven speaker driving units 20A are set in the same number of
angles as that of the regular pentagonal diaphragm segment 12 as described later, and are
formed in substantially regular pentagonal eleven speaker housings 27, respectively. After being
attached, one pentagonal plate 28 having the same external shape as the eleven speaker
housings 27 and the speaker housing 27 and provided for the bottom surface facing the pedestal
13 in the multifaceted diaphragm assembly 11A. {Fig. 7 (b)} is combined in a substantially
spherical shape to be a polyhedral speaker housing assembly which is approximately similar to
the polyhedral diaphragm assembly 11A and smaller than the polyhedral diaphragm assembly
11A and has 12 faces. A solid 26 is assembled.
12-05-2019
11
[0044]
Thus, eleven speaker housings 27 and one pentagonal plate 28 have the speaker drive units 20A
attached to the inner surface side of the twelve-faced multifaceted diaphragm assembly 11A of
the eleven diaphragm segments 12 and the pedestals 13. A total of 12 multifaceted speaker
housing assemblies 26 according to {FIG. 7 (b)} are accommodated.
[0045]
Here, the structure of the electroacoustic transducer 10A according to the first embodiment of
the present invention will be described in detail with reference to FIGS.
[0046]
FIG. 4 is a plan view showing a diaphragm developed by connecting 11 regular pentagonal
diaphragm segments in the electroacoustic transducer according to the first embodiment of the
present invention in plan view, and FIG. 5 is shown in FIG. FIG. 6 is a longitudinal cross-sectional
view showing an assembled state of an adjacent speaker drive unit in the electro-acoustic
transducer according to the first embodiment of the present invention. Fig. 7 (a) is an enlarged
perspective view of the speaker housing shown in Fig. 6, and (b) is a multi-faced speaker housing
in which a plurality of speaker housings and one pentagonal plate for the bottom surface are
assembled. FIG. 8 is a perspective view showing a state in which adjacent speaker drive units are
assembled in the electro-acoustic transducer of Example 1 according to the present invention.
[0047]
First, as shown in FIG. 4, the diaphragm 11 used in the electroacoustic transducer 10A of the first
embodiment according to the present invention has eleven diaphragm segments 12 formed in,
for example, a regular pentagonal shape using a resin sheet material or the like. It is formed in
advance in a state of being spread in a plane.
Here, as an example of the resin sheet material used for the diaphragm 11, a foamed
polypropylene sheet material having good vibration characteristics is applied.
[0048]
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12
When a regular pentagonal diaphragm segment 12 located at the center of the figure in the
diaphragm 11 is used for the top surface, each side (five sides) of the top surface diaphragm
segment 12 is used for the upper side. A total of five diaphragm segments 12 are respectively
formed to be connected, and a total of five diaphragm segments 12 for the upper side are
respectively connected to form the diaphragm segments 12 for the lower side. .
Under the present circumstances, although the part which diaphragm segment 12 comrades
have formed edge part 12f beforehand, the site | part from which diaphragm segment 12
comrades is separated mutually opposes among the diaphragm segments 12 which adjoin The
edge members 14 (FIG. 1 and FIG. 2) are bonded to each other by bonding using an adhesive
agent so as to form a substantially spherical shell shape.
[0049]
Here, when the regular pentagonal diaphragm segment 12 constituting a part of the diaphragm
11 (FIGS. 1 to 4) is shown enlarged in FIG. 5, the regular pentagonal diaphragm segment 12 is
centered on the central axis O. The concave spherical surface 12a is formed to project upward at
a slight height, and the convex ring 12b is concentrically projected in a ring shape so as to
surround the concave spherical surface 12a. One end of a bobbin 24 (FIG. 6) of a speaker drive
unit 20A described later is adhered along the inner peripheral surface of the convex ring 12b, so
that the central axis of the regular pentagonal diaphragm segment 12 O is concentric with the
central axis of the bobbin 24 of the speaker drive unit 20A.
[0050]
In the first embodiment, the concave spherical portion 12a is formed at the central portion of the
regular pentagonal diaphragm segment 12, but instead of the concave spherical portion 12a, a
flat circular surface or a convex that slightly protrudes It may be a spherical portion.
[0051]
Further, the sloped surface portion 12c is connected to the outer periphery of the convex ring
portion 12b of the diaphragm segment 12 so that the inclined surface portion 12c is offset by
the eccentricity H with respect to the central axis O of the diaphragm segment 12 and has a
gentle inclination around the eccentric axis OH It is formed in a cone shape toward the flat
surface portion 12e on the side.
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13
Then, at the boundary where the inclined surface 12c of the diaphragm segment 12 and the flat
surface 12e intersect, the locus of the large diameter circle 12d is offset by the eccentricity H
with respect to the convex ring 12b with the eccentric axis OH described above as a center. It is
obtained.
In other words, the inclined surface 12c is formed from the outer periphery of the large diameter
circle 12d eccentric on the diaphragm segment 12 toward the convex ring 12b provided at the
central portion of the diaphragm segment 12.
[0052]
Here, in order to clearly illustrate the inclined shape of the inclined surface portion 12c of the
diaphragm segment 12, an imaginary line is shown and the length of the imaginary line on the
right side of the illustration is short and the inclination is steep. The length of the line is long and
loose.
The large-diameter circle 12d on the outer peripheral side of the inclined portion 12 is not
limited to a true circle, and may be an ellipse.
[0053]
At this time, the amount of eccentricity H on the diaphragm segment 12 and the diameter of the
large diameter circle 12d may be determined according to the external size of the regular
pentagonal diaphragm segment 12, and as described later, the amount of eccentricity H is large.
Then, acoustic characteristics can be obtained well.
[0054]
In addition, the eccentric direction of the inclined surface portion 12c and the large diameter
circle 12d obtained on the diaphragm segment 12 formed into a regular pentagon has an apex
angle of one regular pentagon, in the case of only one diaphragm segment 12. If the side is
decentered, the acoustic characteristics become better.
[0055]
Further, the eccentric direction of the inclined surface portion 12c and the large diameter circle
12-05-2019
14
12d obtained on the diaphragm segment 12 formed in a regular pentagonal shape is the first in
the case where eleven diaphragm segments 12 are combined in a substantially spherical shell
shape. Although the direction may be an appropriate direction for the diaphragm segment 12 for
the top surface shown in FIG. 4, five diaphragm segments for the lower side surface for the five
upper side diaphragm segments 12 The diaphragm for the upper side is made to be eccentric in
the direction toward 12 while the diaphragm segment 12 for the lower side is made eccentric in
the direction towards the diaphragm segment 12 for the upper side Since the sloped surface
portion 12c of the segment 12 and the large diameter circle 12d and the sloped surface portion
12c and the large diameter circle 12d of the diaphragm segment 12 for the lower side are
eccentrically symmetrical in the vertical direction, Generating dip D (FIG. 11) generated in the
frequency response of each reproduced sound obtained is reduced, better acoustic properties are
obtained.
[0056]
Next, as shown in FIG. 6 in an enlarged manner, the speaker drive unit 20A for vibrating the
diaphragm segment 12 opposite to the diaphragm segment 12 is described below with the
central axis O of the diaphragm segment 12 as a center. The constituent components are
assembled concentrically.
At this time, after assembling the speaker drive unit 20A, the diaphragm segment 12 is bonded
to one end 24a of the bobbin 24 described below along the inner peripheral surface of the
convex ring 12b of the diaphragm segment 12 as described above. As described above, the
speaker drive unit 20A used in the first embodiment is unitized without the diaphragm.
[0057]
The speaker drive unit 20A described above can be joined to the speaker housings 27 adjacent to
each other as one base of the speaker drive unit 20A, as described later.
[0058]
Here, the respective components of the speaker drive unit 20A will be described in order. The
yoke 21 has a circular recess 21a whose inside is hollowed out into a circular recess using a soft
magnetic material, and a ring-shaped outer wall which is an outer wall of the circular recess 21a.
The portion 21b is formed concentrically.
12-05-2019
15
[0059]
Further, the cylindrical magnet 22 is concentrically fixed within the circular recess 21a of the
yoke 21 with an adhesive or the like centering on the central axis O of the diaphragm segment
12 and the magnet within the circular recess 21a. A ring-shaped gap S is disposed between the
outer circumferential surface 22 a and the outer circumferential surface 22 a.
[0060]
Further, the cylindrical pole piece 23 is concentrically fixed on the cylindrical magnet 22 with an
adhesive or the like centering on the central axis O of the diaphragm segment 12 and the outer
peripheral surface 22 a of the magnet 22. An outer peripheral surface 23a having a diameter
substantially the same as the diameter is formed.
[0061]
Further, the bobbin 24 is formed into a long tubular shape using a nonmagnetic resin material,
and one end 24 a is formed with the central axis O of the diaphragm segment 12 as a center
after assembling the speaker drive unit 20A. The adhesive is used to adhere along the inner
peripheral surface of the convex ring portion 12b, and the inner peripheral surface 24c on the
other end 24b side is separated from the outer peripheral surface 23a of the pole piece 23 by a
very small gap. It is disposed to face each other.
[0062]
The ring-shaped voice coil 25 is fixed to the outer peripheral surface 24 d on the other end 24 b
side of the bobbin 24 using an adhesive. The other end 24 b of the bobbin 24 to which the voice
coil 25 is fixed is the yoke 21. The ring-shaped gap S formed between the ring-shaped outer wall
21b of the yoke 21 and the outer peripheral surface 23a of the pole piece 23 is inserted in the
circular recess 21a.
[0063]
In the speaker housing 27, a substantially regular pentagonal upper surface 27b is formed on the
inner upper side of the five outer peripheral side surfaces 27a using a nonmagnetic resin
material, and the center axis O of the diaphragm segment 12 is centered. The ring-shaped outer
wall portion 21b of the yoke 21 is fixed with an adhesive in the lower circular recess 27c formed
by thinning at the inner lower portion, and the through hole 27d into which the bobbin 24 enters
above the lower circular recess 27c. An upper circular recess 27e is formed concentrically, and
an arc-shaped notch 27f for air flow is formed at the apex of each outer peripheral side surface
27a.
12-05-2019
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[0064]
Further, the first suspension 29 is formed in a thin ring shape using polyimide or the like, and
the outer peripheral portion is formed on the outer peripheral surface of the upper circular
recess 27 e formed above the speaker housing 27 using an adhesive. The inner peripheral
portion is fixed to the outer peripheral surface 24 d located at the axially intermediate portion of
the bobbin 24 using an adhesive and is swingable integrally with the bobbin 24 in the central
axis direction.
[0065]
Further, the ring-shaped spacer 30 is formed in a ring shape with a predetermined thickness
using a resin material, and is fixed on the upper surface 27 b of the speaker housing 27 using an
adhesive.
[0066]
Furthermore, the second suspension 31 is formed in the same manner as the first suspension 29
described above, and is positioned above the first suspension 29, and the ring-shaped spacer 30
whose outer peripheral portion has a predetermined thickness. The inner peripheral portion is
fixed to the outer peripheral surface 24 d of the bobbin 24 with an adhesive, and is integrally
pivotable with the bobbin 24 in the central axial direction.
[0067]
In the first embodiment, the lead wire 25a of the voice coil 25 is formed on the bottom surface
21c of the yoke 21 and drawn out through the hole 21c1 to which the insulating film is applied,
but the invention is not limited thereto. The lead wire 25a of the voice coil 25 may be drawn
from the side of the speaker housing 27 to the outside.
[0068]
Then, when assembling the speaker drive unit 20A, the ring-shaped outer wall 21b of the yoke
21 is fixed with an adhesive in the lower circular recess 27c of the speaker housing 27, and the
cylindrical magnet 22 is fixed in the circular recess 21a of the yoke 21. And the cylindrical pole
piece 23 are stacked and attached centering on the central axis O of the diaphragm segment 12.
Furthermore, with the voice coil 25 bonded to the outer peripheral surface 24 d on the other end
12-05-2019
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24 b side of the bobbin 24, the first part of the outer peripheral surface 24 d of the bobbin 24 is
mounted in the upper circular recess 27 e of the speaker housing 27. And the second suspension
31 attached via the ring-shaped spacer 30, and the inner peripheral surface 24c on the other end
24b side of the bobbin 24 is the outer peripheral surface 23a of the pole piece 23. It arranges so
as to face each other with a very small gap.
[0069]
Furthermore, after assembling the speaker drive unit 20A, bonding is performed using an
adhesive along the inner circumferential surface of the convex ring portion 12b formed with the
one end 24a of the bobbin 24 centering on the central axis O of the diaphragm segment 12
doing.
[0070]
A magnetic circuit is formed by the yoke 21, the magnet 22, the pole piece 23, and the voice coil
25 fixed to the outer peripheral surface 24d of the bobbin 24 in one speaker drive unit 20A
configured by each component as described above. When the drive current is supplied to the
voice coil 25 from the outside, a driving force is generated in the voice coil 25 by the magnetic
circuit described above, and the bobbin 24 is swingably supported by the first and second
suspensions 29 and 31. Since it moves in the central axis direction, the diaphragm segment 12
bonded to one end 24 a of the bobbin 24 vibrates to obtain reproduced sound.
Then, when a total of eleven speaker drive units 20A are driven, the eleven diaphragm segments
12 constituting the multifaceted polygonal diaphragm segment 12 vibrate, and the vibration of
each diaphragm segment 12 is synthesized and obtained. A reproduced sound (hereinafter
referred to as a synthesized reproduced sound) is obtained.
[0071]
Here, as shown in an enlarged manner in FIG. 7A, the above-described speaker housing 27 is a
member that constitutes the main part of the first embodiment, and is made of resin material and
is located on the upper inside of the five outer peripheral side surfaces 27a. The upper surface
27 b is formed in a substantially regular pentagonal shape with the same number of angles as
the regular pentagonal diaphragm segment 12.
[0072]
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Under the present circumstances, each outer peripheral side surface 27a of the speaker housing
27 is an inclined surface which becomes small in external shape toward inner side, and while the
pin part 27a1 is protrudingly formed by each outer peripheral side surface 27a, Pin fitting holes
27a2 are formed in line with the portion 27a1.
[0073]
Further, as described above with reference to FIG. 6, the speaker housing 27 is formed by cutting
the lower circular recess 27c (shown only in FIG. 6) concavely in the inner lower portion, and the
upper circular at the inner upper portion The recess 27e is formed to be concave and thin, and a
through hole 27d is formed to penetrate between the lower circular recess 27c and the upper
circular recess 27e.
[0074]
Further, an arc-shaped notch portion 27f for air flow is formed at an apex portion of each outer
peripheral side surface 27a of the speaker housing 27.
[0075]
Here, in the case where the twelve speaker housings assembly 26 is obtained by temporarily
combining the eleven speaker housings 27 formed as described above and one pentagonal plate
28 {FIG. 7 (b)}, In the plurality of speaker housings 27, outer peripheral side surfaces 27a not
joined to each other are opposed to each other, and pin portions 27a1 projected from the outer
peripheral side surface 27a of one speaker housing 27 are formed on the outer peripheral side
surfaces 27a of the other speaker housing 27 Fit into the fixed pin fitting hole 27a2 and perform
positioning by concavo-convex fitting, couple the both, and repeat this to form 11 speaker
housings 27 and one pentagonal plate 28 for the bottom surface {FIG. 7 (b)} Are coupled in a
substantially spherical shape by means of a concavo-convex fit to obtain a multi-faced speaker
housing assembly 26.
[0076]
In the first embodiment, when the adjacent speaker housings 27 are coupled to each other, the
pin portions 27a1 and the pin fitting holes 27a2 are engaged with each other in a concavoconvex manner, but the present invention is not limited to this. It may be a concavo-convex fit
that can be taken out.
[0077]
Then, as shown in FIG. 7B, if the eleven speaker housings 27 and one pentagonal plate 28 are
12-05-2019
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temporarily combined, a twelve-sided multifaced speaker housing assembly 26 is obtained in a
substantially spherical shape. However, at this time, an air flow hole formed by combining three
circular notch portions 27f for air flow formed at the apex angle portion of each speaker housing
27 is formed at each apex angle portion of the multifaced speaker housing assembly 26 And air
between the diaphragm 11 (FIGS. 1 to 6) and the multi-faced speaker housing assembly 26 can
flow into the multi-faced speaker housing assembly 26 through the air communication holes.
Favorable acoustical properties are obtained, particularly in the bass range, because the lower
resonance frequency fo shifts to the lower frequency side with the increase of the air volume in
the housing assembly 26
[0078]
In the first embodiment, the air flow hole formed in the multi-faced speaker housing assembly 26
is an example in which three air flow circular notch portions 27f formed at apex angles of each
speaker housing 27 are combined. However, the present invention is not limited to this, and it is
sufficient to form at least one or more air communication holes in appropriate positions of the
multi-faced speaker housing assembly 26 with appropriate shapes.
[0079]
Furthermore, the speaker housing 27 in the first embodiment is formed in a substantially regular
pentagonal shape in the same manner as the diaphragm segment 12 when the upper surface 27
b is formed. However, the upper surface of the speaker housing may be a polygon having a
number of angles larger than that of the diaphragm segment 12, and the polygon speaker
housing may be formed into a substantially spherical shape. When a plurality of loudspeaker
housing assemblies are combined to obtain a multi-faced speaker housing assembly, the number
of loudspeaker housings should be such that the number of faces can be opposed to each
diaphragm segment 12.
[0080]
By the way, when the electroacoustic transducer 10A of the first embodiment is actually
assembled, as shown in FIGS. 6 and 8, the speaker driving is performed inside the speaker
housing 27 based on one speaker housing 27. As components constituting the unit 20A, a yoke
21, a magnet 22, a ball piece 23, a bobbin 24 to which a voice coil 25 is fixed, a first suspension
29, a spacer 30, a second suspension 31, and Are assembled in the above order to obtain the
speaker drive unit 20A, and then the speaker drive unit 20A is attached to the upper surface 27b
of the eleven speaker housings 27 and one pentagonal plate 28 {a bottom surface of these eleven
speaker housings 27 { 7 (b)} to combine the multi-faced speaker housing assembly 26 Te, and by
fixing one of the pentagonal plate 28 pipe member 15 in [Figure 7 (b)} wiring and supporting in
(FIGS. 1 to 3).
12-05-2019
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[0081]
After this, one pentagonal plate 28 {FIG. 7 (b) in the through hole 13a of the pedestal 13 (FIG. 2)
facing the one pentagonal plate 28 {FIG. 7 (b)} in the multifaceted speaker housing assembly 26.
} Through the pipe member 15 (FIGS. 1 to 3) fixed thereto, and one end 24a of each bobbin 24 in
the eleven speaker drive units 20A is filled with an adhesive, and 11 surfaces of the one end
portion 24 a are covered with the 11 surfaces of the vibration plate 11, and the one end portion
24 a of each bobbin 24 is adhered in the convex ring portion 12 b of each vibration plate
segment 12 in the vibration plate 11. The 12-sided multi-faced speaker housing assembly 26
substantially similar to this and formed into a 12-sided multi-faced speaker housing assembly 26
is housed in the 12-sided multi-faced diaphragm assembly 11A by the diaphragm 11 and the
pedestal 13 (FIG. 2). Electroacoustic Transducer of Example 1 0A is completed.
[0082]
FIG. 8 specifically shows the shapes of the first and second suspensions 29 and 31 which support
the bobbin 24 in the speaker drive unit 20A so as to be pivotable in the central axis direction.
[0083]
From the above, since the plurality of speaker driving units 20A are attached to the plurality of
speaker housings 27 in the multifaceted speaker housing assembly 26, there is no need to
separately provide a multifaced support for attaching the plurality of speaker driving units 20A.
Thus, the electroacoustic transducer 10A of the first embodiment can be provided at low cost.
[0084]
Next, the acoustic characteristic of the electroacoustic transducer 10A of Example 1 produced as
mentioned above is demonstrated using FIGS. 9-13.
[0085]
FIG. 9 is a view for explaining the standing wave distribution on the surface of the diaphragm
segment when the inclined surface portion and the large diameter circle of the diaphragm
segment are not decentered in the electroacoustic transducer of Example 1 according to the
present invention. FIG. 10 is a view for explaining the standing wave distribution on the surface
of the diaphragm segment when the inclined surface portion and the large diameter circle of the
diaphragm segment are decentered in the electroacoustic transducer according to the first
embodiment of the present invention; FIG. 11 is a diagram showing frequency characteristics of
reproduced sound by a diaphragm segment in the electro-acoustic transducer of Example 1
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according to the present invention, and FIG. 12 is a synthesized reproduced sound in the electroacoustic transducer of Example 1 according to the present invention FIG. 13 is a diagram
showing directivity characteristics of the electro-acoustic transducer of Embodiment 1 according
to the present invention.
[0086]
9 and 10 show vibration analysis for the case where the inclined surface portion 12c and the
large diameter circle 12d of the diaphragm segment 12 are not eccentric with respect to the
central axis O of the diaphragm segment 12, respectively. It shows the state of vibration when
conducted, and as the vibration analysis conditions, the force obtained from the strength of the
magnetic field of the actual magnetic circuit, the effective coil length and the number of turns is
applied to the voice coil 25 (FIG. 6) as a sine vibration. For example, at 12 K (Hz), the distribution
of displacement in the central axis direction of each diaphragm segment 12 is indicated by a
solid line, and the sectional shape of the diaphragm A-A is indicated by a two-dot chain line.
[0087]
Then, as shown in FIG. 9, when the inclined surface portion 12c and the large diameter circle
12d of the diaphragm segment 12 are not eccentric, the standing wave is clearly symmetrical
with respect to the central axis O of the diaphragm segment 12. Since the sound is reproduced,
the standing waves overlap each other and are emphasized in the synthetically reproduced sound
by the eleven diaphragm segments 12.
[0088]
On the other hand, as shown in FIG. 10, when the inclined surface portion 12c and the large
diameter circle 12d of one diaphragm segment 12 are decentered, the standing wave is clearly
centered on the central axis O of the diaphragm segment 12. Since the sound is asymmetrical,
the synthetic reproduction sound by the 11 diaphragm segments 12 strengthens each other by
superposition of sound waves due to each standing wave on the diaphragm segment 12 and the
weakening is alleviated, so that the acoustic characteristics are good. Become.
[0089]
Here, as shown in FIG. 11, in the frequency characteristics of the reproduced sound by the
diaphragm segment 12, the length of one side of the diaphragm segment 12 formed in a regular
pentagon is set to, for example, 34 mm. The amount of eccentricity H is large when the amount
of eccentricity H (Figs. 5 and 10) of the inclined surface portion 12c and the large diameter circle
12d is eccentrically set to, for example, 0 mm, 1.5 mm, 3 mm on one apex angle side of a regular
pentagon. As the level value of peak P appearing in the vicinity of 150 (Hz) decreases as the
12-05-2019
22
depth of dip D appearing in the vicinity of 8 K (Hz) decreases gradually by decentering, the larger
the amount of eccentricity H, the more each vibration Since the dip D occurring in the frequency
response of each reproduction sound obtained by the plate 12 can also be reduced, the acoustic
characteristics are improved.
[0090]
Then, when the amount of eccentricity H (FIG. 5, FIG. 10) of the inclined surface portion 12c of
the diaphragm segment 12 and the large diameter circle 12d is set to 3 mm, for example, The
frequency characteristics of the synthetic reproduction sound in the acoustic converter 10A are
as shown in FIG.
In this case, in the 11 diaphragm segments 12, the frequency at which the peak PG of the
synthetic reproduction sound suppressed by the eccentricity is 150 Hz at which the peak P (FIG.
11) of the reproduction sound by one diaphragm segment 12 appears. Generally higher than
near frequency, it becomes around 500 (Hz).
Since the peak PG of this synthetic reproduction sound is already suppressed, it is easily
corrected so that the level value of the peak PG of the synthetic reproduction sound becomes
small as shown by a dotted line by a digital signal processor (DSP) not shown. can do.
[0091]
Further, as shown in FIG. 13, the directivity characteristic of the electroacoustic transducer 10A
in which the eleven diaphragm segments 12 are formed in a substantially spherical shape is, for
example, 2 K (Hz), 5 K (Hz), 10 K (Hz). At any of the frequencies, circular nondirectionality is
obtained, and substantially the same nondirectionality is obtained in three dimensions, so that a
good point sound source with nondirectionality can be obtained as a breathing sphere.
[0092]
Next, an application example of the electroacoustic transducer 10A of the first embodiment will
be briefly described with reference to FIGS. 14 and 15. FIG.
[0093]
FIG. 14 is a perspective view showing an application example 1 of the electro-acoustic transducer
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23
according to the first embodiment of the present invention, and FIG. 15 is a perspective view
showing an application example 2 of the electro-acoustic transducer according to the first
embodiment according to the present invention is there.
[0094]
As shown in FIG. 14, in the application example 1 of the electroacoustic transducer 10A
according to the first embodiment of the present invention, the diaphragm segment 12 is not
provided on the bottom surface and the top surface in the electroacoustic transducer 10A having
12 surfaces. Of the 12 surfaces by replacing the bottom surface and the top surface with the
pedestals 13 having the same outer shape as the diaphragm segment 12 and attaching the wiring
/ supporting pipe members 15 via the pedestals 13, respectively. The electroacoustic transducers
10A can be used in series connection.
[0095]
At this time, each pipe member 15 is attached to each pedestal 13, and one end of each pipe
member 15 is provided in the interior to face each pedestal 13, and the speaker housing 27 is
provided in the multifaced speaker housing assembly 26. It is supported by each pentagonal
plate (each support plate) 28 {Fig. 7 (b)} which has substantially the same outer shape and is
joined in a substantially spherical shape.
[0096]
On the other hand, as shown in FIG. 15, in the application example 2 of the electroacoustic
transducer 10A according to the first embodiment of the present invention, the diaphragm
segment 12 is provided on several appropriate faces in the electroacoustic transducer 10A
having 12 faces. The plurality of electroacoustic transducers 10A can be connected in an
appropriate direction by attaching the wiring / supporting pipe members 15 to the plurality of
surfaces via the pedestals 13 without providing the .
[0097]
FIG. 16 is a perspective view schematically showing an electroacoustic transducer according to a
second embodiment of the present invention.
[0098]
The electro-acoustic transducer 10B according to the second embodiment of the present
invention shown in FIG. 16 has the same configuration as the electro-acoustic transducer 10A
according to the first embodiment described above except for a part of the configuration. For the
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24
sake of convenience, the same reference numerals are given to the components shown above,
and the components shown above will be appropriately described as necessary, and different
points with respect to the first embodiment will be described.
[0099]
As shown in FIG. 16, the electro-acoustic transducer 10B according to the second embodiment of
the present invention is also configured to obtain an omnidirectional point sound source close to
the breathing sphere, as in the first embodiment.
[0100]
In this second embodiment, when producing the diaphragm 11 having eleven diaphragm
segments 12, unlike the first embodiment, for example, the diaphragm segments 12 formed in a
regular pentagon are separated in advance one by one. After assembling the speaker drive unit in
the same structure as that of the first embodiment based on one speaker housing 27 which is
prepared in a substantially regular pentagon shape and 11 pieces are prepared, one end of the
bobbin 24 of this speaker drive unit is assembled. By bonding the diaphragm segments 12
formed into a regular pentagon, eleven unitized speaker drive units 20B with diaphragms are
obtained.
[0101]
Thereafter, when the electroacoustic transducer 10B of the second embodiment is assembled in a
multi-faced manner, the eleven speaker housings 27 and one pentagonal plate 28 {FIG. 7 (b)} are
combined in a substantially spherical shape to have 12 sides. The multifaceted speaker housing
assembly 26 is obtained.
[0102]
Furthermore, the 11 diaphragm segments 12 respectively attached to the 11 loudspeakerequipped speaker driving units 20B are joined to the outside of the above-described multi-faced
speaker housing assembly 26 in a substantially spherical shape to form the diaphragm 11. In
addition to the above, one pedestal 13 (FIG. 2) formed into a regular pentagonal shape is joined
to this diaphragm 11 in a substantially spherical shell shape to obtain a twelve-sided multifaceted
diaphragm assembly 11A. Since each side of the segment 12 is separated in advance, when
forming the diaphragm 11 in which the eleven diaphragm segments 12 are joined in a
substantially spherical shell shape, each diaphragm segment 12 is illustrated first in the first
embodiment. The edge members 14 (FIGS. 1 and 2) are attached to and connected to all sides of
the adjacent diaphragm segments 12 in the same direction as described using FIG.
12-05-2019
25
[0103]
Therefore, the electro-acoustic transducer 10B of the second embodiment has the same
appearance as the electro-acoustic transducer 10A of the first embodiment described above with
reference to FIGS. 1 to 3, and is similar to the first embodiment. Since the acoustic characteristic
is obtained, the electroacoustic transducer 10B of the second embodiment is also obtained as a
point source having nondirectionality, and if a large number of unitized speaker drive units with
diaphragm 20B are prepared, the production efficiency can be increased. The electro-acoustic
transducer 10B of the second embodiment can be improved because the multi-faced speaker
housing assembly 26 does not need to separately provide a multi-faced support for mounting the
plurality of loudspeaker-equipped speaker driving units 20B. Can be provided inexpensively.
[0104]
Furthermore, although illustration is omitted here, in the electro-acoustic transducer 10B of the
second embodiment, a plurality of electricitys are applied as in the first and second application
examples of the first embodiment described with reference to FIGS. 14 and 15. It is possible to
connect the acoustic transducer 10B via the wiring and supporting pipe member 15.
[0105]
FIG. 17 is a perspective view of the appearance of the electroacoustic transducer according to the
third embodiment of the present invention as viewed from the bottom side. FIG. 18 is an
electroacoustic transducer according to the third embodiment of the present invention. The top
view which expanded and showed the diaphragm which connected the diaphragm segment, and
was shown planarly, FIG. 19 is based on the bottom face side in order to demonstrate the
electroacoustic transducer of Example 3 which concerns on this invention. 20 (a) to 20 (c) show
the joint portion of each side of the inner surface side of the diaphragm, the speaker housing, and
the electro-acoustic transducer of the third embodiment according to the present invention. FIG.
6 is a perspective view shown for explaining a diaphragm connecting member attached as
needed to connect the two.
[0106]
The electroacoustic transducer 10C of the third embodiment according to the present invention
shown in FIG. 17 has the same configuration as the electroacoustic transducers 10A and 10B of
the first and second embodiments described above except for a part of the configuration. Here,
for convenience of explanation, the same reference numerals are given to the components shown
above, and the components shown above will be appropriately described as necessary, and the
components different from the first and second embodiments will be described. Will be described
with points different from the first and second embodiments.
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26
[0107]
As shown in FIG. 17, in the electro-acoustic transducer 10C according to the third embodiment of
the present invention, unlike the first and second embodiments, the pedestal 13 (FIG. 2) is
located at the bottom of the electro-acoustic transducer 10C. Instead of this, one pentagonal
diaphragm segment 12 ′ through which the wiring / supporting pipe member 15 can be
inserted is prepared at the bottom surface, as shown in FIG. A total of 12 diaphragm plates 11
'are formed by connecting 11 diaphragm segments 12 and one diaphragm segment 12'
corresponding to the bottom side, and the diaphragms 11 'are arranged adjacent to each other. ,
12 'are connected in a substantially spherical shape via a plurality of edge portions 12f and a
plurality of edge members 14 respectively formed, whereby diaphragm segments 12 and 12' are
provided on all the faces of the polyhedron. 1 only with diaphragm 11 ' Polygonal-shaped
diaphragm assembly 11A face 'is assembled.
[0108]
When assembling the above-described multi-faceted diaphragm assembly 11A 'into a
substantially spherical shell shape, as shown in FIG. 18, eleven diaphragm segments 12 and one
diaphragm segment 12' corresponding to the bottom surface are provided. Of the 11 diaphragm
segments 12 and the bottom surface and the corresponding one of the diaphragm segments 12
′ are respectively separated and attached to the respective speaker drive units 20B and 20C to
be described later. Any method of joining the diaphragm segments 12 and 12 'may be used.
[0109]
Here, as shown in FIG. 19, in the case where the wiring / supporting pipe member 15 is attached
to a portion to be the bottom surface of the electroacoustic transducer 10C according to the
above, one diaphragm corresponding to the bottom surface side A pipe insertion hole 12a1 is
formed in the concave spherical portion 12a of the segment 12 'so as to substantially coincide
with the outer diameter of the pipe member 15 with the center axis O of the diaphragm segment
12' as a center.
[0110]
At this time, a nonmagnetic material such as an aluminum material or a resin material is used as
the material of the pipe member 15 in order to insert the inside of one speaker drive unit 20C
attached to the inner surface side of one diaphragm segment 12 '. .
[0111]
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27
Further, a tubular shock absorbing material 41 formed into a tubular shape using felt or cloth is
adhered along the outer periphery of the pipe insertion hole 12a1 to the inner surface of the
concave spherical portion 12a formed in one diaphragm segment 12 ', and the diaphragm
segment The tubular cushioning member 41 is rockable in the central axial direction integrally
with 12 ', and when the pipe member 15 is inserted into the pipe insertion hole 12a1, the
vibration is generated from the gap between the pipe member 15 and the pipe insertion hole
12a1. It is provided to prevent air on the inner surface side of the plate segment 12 'from leaking
to the outside.
[0112]
Further, the electroacoustic transducer 10C of the third embodiment is the eleven speakers
described in the first embodiment (or the second embodiment) on the inner surface side of each
of the diaphragm segments 12 corresponding to the eleven diaphragm segments 12. The drive
units 20A (or 20B) are concentrically mounted centering on the central axis O of each diaphragm
segment 12, and furthermore, on the inner surface side of one diaphragm segment 12
'corresponding to the bottom surface side, 11 units are provided. A single speaker drive unit 20C
having a partially different structure from the speaker drive unit 20A (or 20B) is concentrically
mounted about the central axis O of the diaphragm segment 12 ', and this single speaker drive
unit 20C One diaphragm segment 12 'can be vibrated in the same manner as the eleven
diaphragm segments 12.
[0113]
Furthermore, a multifaceted speaker of 12 faces by 11 speaker housings 27 to which 11 speaker
driving units 20A (or 20B) are respectively attached and a speaker housing 27 to which one
speaker driving unit 20C corresponding to the bottom side is attached. The housing assembly 26
is coupled in a substantially spherical shape substantially as in the first and second embodiments.
[0114]
The above-described one speaker drive unit 20C has a partial shape for attaching the pipe
member 15 to the yoke 21, the magnet 22, and the pole piece 23 among the constituent
members of the eleven speaker drive units 20A (or 20B). Are different.
[0115]
Specifically, in each component of one speaker drive unit 20C, the yoke 21 has a screw hole
21c2 in which a screw portion 15a formed at one end of the pipe member 15 is screwed to the
bottom surface 21c. It penetrates centering on central axis O of 12 ', and is formed.
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[0116]
Further, in the magnet 22 and the pole piece 23, the respective pipe insertion holes 22b, 23b for
inserting the pipe member 15 are made to substantially match the outer diameter of the pipe
member 15 with the central axis O of the diaphragm segment 12 'as a center. It is formed
through.
[0117]
Therefore, the pipe member 15 is inserted from the pipe insertion hole 12a1 formed in the
concave spherical surface portion 12a of one diaphragm segment 12 'corresponding to the
bottom surface side of the electroacoustic transducer 10C, and one end side of the pipe member
15 is further After inserting through the pipe insertion holes 22b and 23b formed in the magnet
22 and the pole piece 23, the screw portion 15a formed at one end of the pipe member 15 is
screwed into the screw hole 21c2 formed in the bottom surface 21c of the yoke 21. By doing
this, the pipe member 15 is fixed to the yoke 21, and the lead wires 25 a of the plurality of voice
coils 25 are inserted into the pipe member 15 and pulled out to the outside.
[0118]
As described above, in the diaphragm 11 'in the third embodiment, the eleven diaphragm
segments 12 and one diaphragm segment 12' corresponding to the bottom surface side are
connected to be provided on all the faces of the polyhedron Since the diaphragm segments 12
and 12 'respectively vibrate, the vibration characteristics of the diaphragm 11' can be further
improved as compared with the first and second embodiments.
[0119]
In the third embodiment, the pipe member 15 is attached to the diaphragm segment 12
'corresponding to the bottom surface side of the electroacoustic transducer 10C. However, the
embodiment described above with reference to FIGS. 14 and 15 is described. As in the first and
second application examples, when connecting a plurality of electroacoustic transducers 10C via
the wiring / support pipe member 15, some of the twelve diaphragm segments 12, 12 'are used.
A pipe insertion hole 12a1 for inserting the pipe member 15 is formed at a central portion, and
each speaker driving unit 20C of the above shape is provided for each diaphragm segment 12 'of
the above shape to which each pipe member 15 is attached Should be attached.
[0120]
Furthermore, as shown in FIG. 19, in the electroacoustic transducer 10C according to the third
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embodiment of the present invention, when the multifaceted diaphragm assembly 11A 'is
relatively large, or in the multifaceted diaphragm assembly 11A'. When each edge member 14 is
formed of a soft member, each diaphragm segment 12 (or each diaphragm segment 12 (or 12 ′)
in the multi-faceted diaphragm assembly 11A ′ is not distorted by its own weight. Alternatively,
the upper surface of each speaker housing 27 to which the speaker driving unit 20A (or 20B) or
(20C) facing the bonding site of each side on the inner surface side of 12 ') and each diaphragm
segment 12 (or 12') is attached A plurality of diaphragm connecting members 42 which connect
with 27b are attached as necessary.
[0121]
Here, as shown in FIGS. 20 (a) to 20 (c), the above-mentioned diaphragm connecting member 42
is not affected by the vibration of each diaphragm segment 12 (or 12 ') constituting the
diaphragm 11' (FIG. 19). It is formed using a material such as urethane rubber which has a
flexibility greater than that of each diaphragm segment 12 (or 12 ') so as not to adversely affect
it.
[0122]
The diaphragm connecting member 42 has a bottom surface 42a formed in a pentagonal shape
substantially conforming to the external dimensions of the upper surface 27b of the speaker
housing 27 formed in a pentagonal shape, and is attached to the upper surface 27b of the
speaker housing 27 in the bottom surface 42a. A circular relief hole 42a1 for escaping the ringshaped spacer 30 is formed to penetrate, and an air circulation hole 42a2 is formed at each apex
of the bottom surface 42a, and an arc-shaped notch 27f for air circulation of the speaker housing
27 is formed. It is formed opposite to.
[0123]
Also, five inclined surfaces 42 b are formed to gradually spread outward from each side of the
bottom surface 42 a of the diaphragm connecting member 42 toward each side of the diaphragm
segment 12 (or 12 ′), The respective inclined surfaces 42b are connected to each other, and
rectangular relief holes 42b1 for reducing the rigidity are formed in the respective inclined
surfaces 42b so as to penetrate therethrough.
[0124]
Then, the bottom surface 42a of the diaphragm connecting member 42 is attached to the top
surface 27b of the speaker housing 27 using an adhesive, and the end of each inclined surface
42b is a bonding site of each side of the diaphragm segment 12 (or 12 ') The edge portion 12f
(FIG. 18) is attached to the edge member 14 from the inner surface side using an adhesive.
12-05-2019
30
[0125]
Furthermore, in the third embodiment, the end of each inclined surface 42b of the diaphragm
coupling member 42 is bonded across the entire sides of the diaphragm segment 12 (or 12 '), but
the present invention is not limited thereto. A diaphragm connecting member having a shape
capable of partially supporting only a central portion of each side of the diaphragm segment 12
(or 12 ′) or only both end portions of each side of the diaphragm segment 12 (or 12 ′) It is
good.
[0126]
In the multi-faced diaphragm assembly 11A 'in which the diaphragms 11' having a total of 12
diaphragm segments 12 and 12 'connected as described above are formed in a substantially
spherical shell shape, each diaphragm segment 12 and 12' Since the inner surface side is
supported by the individual diaphragm connecting members 42, no deformation due to the
weight of each diaphragm segment 12 or 12 'in the multifaceted diaphragm assembly 11A'
occurs, so that good acoustic characteristics can be obtained.
[0127]
The technical idea of supporting the inner surface side of the diaphragm segment 12 by the
diaphragm coupling member 42 is substantially spherical shell of the diaphragm 11 connecting
the eleven diaphragm segments 12 in the first and second embodiments described above. The
present invention is also applicable to a multi-faceted diaphragm assembly 11A (FIGS. 1 to 3)
formed in a shape of a circle.
[0128]
FIG. 21 is a perspective view schematically showing a schematic configuration of an electroacoustic transducer according to a fourth embodiment of the present invention, and FIG. 22 is a
speaker driving unit adjacent to the electro-acoustic transducer according to the fourth
embodiment of the present invention. FIG. 23 shows an enlarged view of a pentagonal pyramid in
the multiplanar mount assembly in the electroacoustic transducer according to the fourth
embodiment of the present invention. (B) is an enlarged perspective view showing a pentagonal
frustum in the multiplanar mount assembly, and FIG. 24 is a perspective view showing the
multiplanar mount assembly in which a plurality of pentagonal pyramids are assembled. FIG.
[0129]
The electro-acoustic transducer 10D according to the fourth embodiment of the present
12-05-2019
31
invention shown in FIG. 21 has the same configuration as that of the electro-acoustic transducer
10A according to the first embodiment described above except for a part of the configuration.
For the sake of convenience, the same reference numerals are given to the components shown
above, and the components shown above will be appropriately described as necessary, and new
components will be added to components different from the first embodiment. The differences
with respect to the first embodiment will be described.
[0130]
In the electro-acoustic transducer 10D according to the fourth embodiment of the present
invention shown in FIG. 21, as in the first embodiment, eleven diaphragm segments 12 formed in
a regular pentagon as shown in FIG. 4 are connected. A multi-faceted diaphragm assembly
consisting of a total of 12 planes of a diaphragm 11 and an equilateral pentagonal base 13 (FIG.
2) rigidly formed on the bottom of the diaphragm 11 (FIG. 2) A solid body 11A is obtained, and a
wiring / supporting pipe member 15 is attached to a central portion of the pedestal 13.
[0131]
Therefore, the external shape of the electroacoustic transducer 10D of the fourth embodiment is
the same as the electroacoustic transducer 10A of the first embodiment described above with
reference to FIGS. The internal structure of a multi-faced diaphragm assembly 11A formed to
have 12 faces in a substantially spherical shell shape is different from that of the first
embodiment although the point source of the sex is obtained.
[0132]
That is, in the electro-acoustic transducer 10D according to the fourth embodiment of the
present invention, eleven speaker drive units 20D are attached to the inside of the multifaceted
diaphragm assembly 11A having approximately 12 faces and formed in a substantially spherical
shape. For this purpose, 11 speaker mounts (hereinafter referred to as pentagonal pyramids) 52
each formed into a pentagonal pyramid and one support pedestal (hereinafter referred to as one
pentagonal pyramid) formed in substantially the same shape as the pentagonal pyramid 52 And
12) which is substantially similar to the multi-faceted diaphragm assembly 11A and smaller than
the multi-faced diaphragm assembly 11A. It is stored.
[0133]
Here, as shown in an enlarged manner in FIG. 22, the diaphragm segments 12 adjacent to each
other in the diaphragm 11 are joined using the edge member 14 as necessary, and are adjacent
to the pedestal 13 (FIG. 2) Each diaphragm segment 12 is also coupled using an edge member
14.
12-05-2019
32
[0134]
In the speaker drive unit 20D for vibrating the diaphragm segment 12 so as to face the
diaphragm segment 12, the following constituent members are concentrically assembled
centering on the central axis O of the diaphragm segment 12: There is.
At this time, after assembling the speaker drive unit 20D, one end 24a of the bobbin 24
described below is adhered to the central portion of the inner surface of the diaphragm segment
12 after assembling the speaker drive unit 20D. Is unitized without the diaphragm.
[0135]
The speaker driving unit 20D described above is different from the first embodiment in that the
speaker housing 53 as a base of the speaker driving unit 20D is separated from the adjacent
speaker housing 53.
[0136]
The speaker housing 53 described above is formed of a nonmagnetic resin material and has an
upper surface 53b formed in a ring shape on the inner upper side of the cylindrical outer
peripheral side surface 53a, and the inside with the central axis O of the diaphragm segment 12
as a center A lower circular recess 53c is thinly formed in the lower portion, and a through hole
53d and an upper circular recess 53e are concentrically formed above the lower circular recess
53c.
[0137]
Then, when assembling the speaker drive unit 20D, the ring-shaped outer wall 21b of the yoke
21 is fixed to the lower circular recess 53c of the speaker housing 53 with an adhesive
substantially in the same manner as in the first embodiment. A cylindrical magnet 22 and a
cylindrical pole piece 23 are stacked and attached in the space 21 a with the central axis O of the
diaphragm segment 12 as a center.
Furthermore, with the voice coil 25 bonded to the outer peripheral surface 24 d on the other end
12-05-2019
33
24 b side of the bobbin 24, the first part of the outer peripheral surface 24 d of the bobbin 24 is
mounted in the upper circular recess 53 e of the speaker housing 53. And the second suspension
31 attached via the ring-shaped spacer 30, and the inner peripheral surface 24c on the other end
24b side of the bobbin 24 is the outer peripheral surface 23a of the pole piece 23. It arranges so
as to face each other with a very small gap.
[0138]
In the fourth embodiment, the lead wire 25a of the voice coil 25 is drawn from the side of the
outer peripheral side surface 53a of the speaker housing 53 to the outside.
[0139]
Further, after assembling the speaker drive unit 20D, bonding is performed using an adhesive
along the inner peripheral surface of the convex ring portion 12b formed with the one end 24a
of the bobbin 24 centering on the central axis O of the diaphragm segment 12 doing.
[0140]
A magnetic circuit is formed by the yoke 21, the magnet 22, the pole piece 23, and the voice coil
25 fixed to the outer peripheral surface 24d of the bobbin 24 in one speaker drive unit 20D
configured by each component as described above. When the drive current is supplied to the
voice coil 25 from the outside, a driving force is generated in the voice coil 25 by the magnetic
circuit described above, and the bobbin 24 is swingably supported by the first and second
suspensions 29 and 31. Since it moves in the central axis direction, the diaphragm segment 12
bonded to one end 24 a of the bobbin 24 vibrates to obtain reproduced sound.
Then, when a total of eleven speaker drive units 20D are driven, the eleven diaphragm segments
12 constituting the diaphragm 11 are vibrated to obtain synthesized reproduction sound.
[0141]
Here, in the case where the eleven speaker drive units 20D are supported by the multilateral
mount assembly 51 in the multifaceted diaphragm assembly 11A, the pentagonal pyramid 52
serving as the loudspeaker mount will be described with reference to FIG. explain.
[0142]
12-05-2019
34
As enlarged and shown in FIG. 23A, the pentagonal pyramid 52 serving as the above speaker
mount is a member constituting the main part of the fourth embodiment, and vibration of a
regular pentagon using a nonmagnetic resin material A surface facing the inner surface of the
plate segment 12 is a pentagon similar to the diaphragm segment 12 as a polygonal surface 52a
and smaller than the diaphragm segment 12, and this polygonal surface (hereinafter referred to
as a pentagonal surface) The respective outer peripheral side surfaces 52b are integrally formed
in a cone shape from each side of 52a, and each of the outer peripheral side surfaces 52b is
directed to the inner central portion.
At this time, pin portions 52b1 are formed to project on the outer peripheral side surfaces 52b of
the pentagonal pyramid 52, and pin fitting holes 52b2 are formed side by side with the pin
portions 52b1.
[0143]
Further, at a central portion of the pentagonal surface 52a of the pentagonal pyramid 52 serving
as a speaker mounting base, a positioning circular recess 52a1 for positioning and fixing the
yoke 21 constituting a part of the speaker drive unit 20D is slightly recessed The positioning
concave portion 52a1 is filled with an adhesive, and the bottom surface 21c of the yoke 21 is
adhered as shown in FIGS. The drive unit 20D is mounted toward the central portion of the inner
surface of the diaphragm segment 12.
[0144]
Referring back to FIG. 22, the pentagonal pyramids 52 formed as described above are adjacent to
each other so that the outer peripheral side surfaces 52b face each other, and the pin portion
52b1 projected from the outer peripheral side surface 52b of one pentagonal pyramid 52 is the
other pentagonal pyramid 52 Fit into the pin fitting hole 52b2 formed in the outer peripheral
side surface 52b, position it by concavo-convex fitting, couple the two, repeat this, 11 pentagonal
pyramids 52 and one pentagonal pyramid 52 for the bottom surface Are combined into a
substantially spherical shape by concavo-convex fitting to obtain a 12-sided multifaceted
mounting assembly 51, and further, for wiring and supporting one pentagonal pyramid 52 for
the bottom surface facing the pedestal 13 (FIG. 2) One end of the pipe member 15 is fixed.
[0145]
In the fourth embodiment, when the respective outer peripheral side surfaces 52b of adjacent
pentagonal pyramids 52 are joined together, the pin portion 52b1 is engaged with the pin fitting
12-05-2019
35
hole 52b2 in a concavo-convex manner, but it is limited to this Instead, it may be a concavoconvex fitting which can be positioned relative to each other.
[0146]
The pentagonal pyramid 52 in the fourth embodiment can be miniaturized when a plurality of
pentagonal pyramids 52 are combined in a substantially spherical shape by forming the
pentagonal plane 52 a into a regular pentagon like the diaphragm segment 12. However, the
present invention is not limited to this, as long as it is a polygonal pyramid having a polygonal
surface with a number of angles larger than the number of angles of the diaphragm segment 12
It is sufficient for the number of polygon pyramids to have the number of faces that can be
opposed to each diaphragm segment 12 when obtaining the mount assembly.
[0147]
Furthermore, in the fourth embodiment, a pentagonal frustum 52A as shown in FIG. 23 (b) is
used as a speaker mount in place of the pentagonal pyramid 52 shown in FIG. 23 (a). Can be
combined in a substantially spherical shape to form a multi-sided mount assembly (not shown).
[0148]
The pentagonal frustum 52A described above comprises a pentagonal surface 52a, pentagonal
pyramidal outer peripheral side surfaces 52b, and a lower surface 52c formed by cutting a
pointed portion of a pentagonal pyramid tip, and each pentagonal pyramidal peripheral side
surface A pin portion 52b1 for coupling and a pin fitting hole 52b2 are formed in 52b.
In this case, when the plurality of pentagonal frustums 52A are joined in a substantially spherical
shape, the polyhedral mount assembly (not shown) forms an internal space (not shown) on the
lower surface 52c side of each pentagonal frustum 52A. In substantially the same manner as in
the first embodiment, the air flow holes may be formed in appropriate shapes at apexes of the
respective pentagonal truncated pyramids 52A or at appropriate positions in the multi-faced
mount assembly (not shown).
[0149]
When the electroacoustic transducer 10D of the fourth embodiment is actually assembled, as
shown in FIGS. 22 and 24, the inner side of the outer peripheral side surface 53a of the speaker
housing 53 is based on one speaker housing 53. The respective components constituting the
12-05-2019
36
speaker drive unit 20D include the yoke 21, the magnet 22, the ball piece 23, the bobbin 24 to
which the voice coil 25 is fixed, the first suspension 29, the spacer 30, and the second The
speaker 31 and the suspension 31 are assembled in the above order to obtain the speaker drive
unit 20D, and then the 11 speaker drive units 20D are mounted on the pentagonal surface 52a
of the 11 pentagonal pyramids 52. One pentagonal pyramid 52 serving as the bottom is united to
obtain a multifaceted mounting assembly 51 and one bottom And by fixing the pipe member 15
of the wiring and supporting five pyramid 52.
[0150]
Thereafter, the wiring and supporting pipe member 15 is fixed to one pentagonal pyramid 52 in
the through hole 13a of the pedestal 13 (FIG. 2) opposed to the one pentagonal pyramid 52 in
the multifaceted mounting assembly 51. , And further filling the adhesive at one end 24a of each
bobbin 24 in the eleven speaker drive units 20D, and covering the eleven diaphragms 11 from
above the one end 24a of each bobbin 24. By bonding one end 24a of each bobbin 24 into the
convex ring portion 12b of each diaphragm segment 12 in the diaphragm 11, 12 surfaces of the
11 diaphragm 11 and pedestal 13 (FIG. 2) are obtained. In the multi-faceted diaphragm assembly
11A of this embodiment, the respective speaker drive units 20D are housed with being attached
to the respective pentagonal pyramids 52 of the multi-faced mounting assembly 51 formed
substantially similar and small in size, Electroacoustic conversion of 4 10D is completed.
[0151]
FIG. 24 specifically shows the shapes of the first and second suspensions 29 and 31 which
support the bobbin 24 so as to be pivotable in the central axis direction.
[0152]
From the above, when mass-producing the electroacoustic transducer 10D, a large number of
one speaker drive units 20D are prepared in a state of being attached to the central portion of
the pentagonal surface 52a of one pentagonal pyramid (speaker mount) 52 Contributing to the
improvement of the productivity of the electroacoustic transducer 10D by assembling the
multifaceted mounting assembly 51 by combining a plurality of pentagonal pyramids (speaker
mounts) 52 to which the speaker drive unit 20D is attached when assembling the acoustic
converter 10D. it can.
[0153]
Therefore, the electro-acoustic transducer 10D of the fourth embodiment also has the same
acoustic characteristics as the electro-acoustic transducer 10A of the first embodiment described
above with reference to FIGS. A good point sound source can be obtained.
12-05-2019
37
[0154]
Furthermore, although illustration is omitted here, even in the electro-acoustic transducer 10D of
the fourth embodiment, a plurality of electricitys are applied as in the first and second
application examples of the first embodiment described with reference to FIGS. It is possible to
connect the acoustic transducer 10D via the wiring and supporting pipe member 15.
[0155]
FIG. 25 is a perspective view schematically showing an electro-acoustic transducer according to a
fifth embodiment of the present invention.
[0156]
As shown in FIG. 25, in the electro-acoustic transducer 10E of the fifth embodiment according to
the present invention, unlike the fourth embodiment, the diaphragm segments 12 formed in a
regular pentagon are separated in advance one by one to prepare eleven. After assembling the
speaker drive unit in the same structure as that of the fourth embodiment based on one speaker
housing 53, the diaphragm segment 12 formed into a regular pentagon at one end of the bobbin
24 of the speaker drive unit. By bonding the two, eleven speaker drive units 20E with a
diaphragm are obtained.
[0157]
After that, when assembling the electro-acoustic transducer 10E of the fifth embodiment, the
multifaceted mounting assembly as described in the eleventh embodiment with reference to FIG.
Attached to the central part of the pentagonal surface 52a formed in each of the eleven
pentagonal pyramids 52 constituting 51 and connecting the eleven pentagonal pyramids 52 and
one pentagonal pyramid 52 for the bottom surface in a substantially spherical shape Shaped
mount assembly 51 is obtained.
[0158]
Furthermore, the 11 diaphragm segments 12 respectively attached to the 11 loudspeakerequipped speaker driving units 20E are joined in a substantially spherical shape to the outside of
the polyhedral mount assembly 51 described above to form the diaphragm 11. While being
obtained, one pedestal 13 (FIG. 2) formed in a regular pentagonal shape is joined to this
diaphragm 11 in a substantially spherical shell shape to obtain a twelve-sided multifaceted
diaphragm assembly 11A.
12-05-2019
38
[0159]
Under the present circumstances, since each side of the diaphragm segment 12 is separated
beforehand, when joining the 11 diaphragm segments 12 and forming the diaphragm 11, each
diaphragm segment 12 was first set in Example 1. The edge members 14 (FIG. 22) are attached
and coupled to all sides of the adjacent diaphragm segments 12 in the same direction as
described with reference to FIG.
[0160]
Therefore, the electro-acoustic transducer 10E of the fifth embodiment has the same appearance
as the electro-acoustic transducer 10D of the fourth embodiment described above with reference
to FIGS. 21 and 22, and is similar to the fourth embodiment. Since the acoustic characteristic is
obtained, the electro-acoustic transducer 10E of the fifth embodiment can also be obtained as a
point source having nondirectionality.
In addition, a large number of unitized speaker-equipped speaker driving units 20E are prepared
in a state of being attached to the central portion of the pentagonal surface 52a of one
pentagonal pyramid 52, and the diaphragm is attached when assembling the electroacoustic
transducer 10E. By combining and assembling a plurality of pentagonal pyramids 52 to which
the speaker drive unit 20E is attached, it is possible to contribute to the improvement of the
productivity of the electroacoustic transducer 10E.
[0161]
Furthermore, although illustration is omitted here, in the electro-acoustic transducer 10E of the
fifth embodiment, as in the first and second application examples of the first embodiment
described above with reference to FIGS. It is possible to connect the acoustic transducer 10E via
the wiring and supporting pipe member 15.
[0162]
In the fifth embodiment as well, the eleven diaphragm-equipped speaker driving units 20E
constitute the multi-sided mount assembly (not shown) described earlier with reference to FIG.
23 (b) in the fourth embodiment. Attaching to the central portion of pentagonal surface 52a
formed respectively on eleven pentagonal frustums 52A, and joining eleven pentagonal frustums
52A and one pentagonal frustum 52A corresponding to the bottom side in a substantially
spherical shape Is also possible.
12-05-2019
39
[0163]
FIG. 26 is a perspective view schematically showing the electroacoustic transducer according to a
sixth embodiment of the present invention, with the bottom side as the main component, and FIG.
27 (a) to (c) schematically In the electro-acoustic transducer of the sixth embodiment according
to the present invention, in order to connect the joining portion of each side on the inner surface
side of the diaphragm and the pentagonal pyramid, in order to explain the diaphragm coupling
member attached as necessary The electro-acoustic transducer 10F of the sixth embodiment
according to the present invention shown in FIG. 26 is the same as the electro-acoustic
transducer 10D or 10E of the fourth or fifth embodiment described above except for the
configuration and part of the electro-acoustic transducer 10F. Here, for convenience of
explanation, the same reference numerals are given to the components shown above, and the
components shown above are appropriately described as necessary, and the fourth embodiment
will be described. And 5 are assigned new reference numerals to explain differences with respect
to the fourth and fifth embodiments. To.
[0164]
As shown in FIG. 26, in the electro-acoustic transducer 10F according to the sixth embodiment of
the present invention, unlike the fourth and fifth embodiments, the pedestal 13 (FIG. 2) is located
at the bottom of the electro-acoustic transducer 10F. Instead of this, one pentagonal diaphragm
segment 12 ′ through which the wiring / supporting pipe member 15 can be inserted is
prepared at a portion to be the bottom, as shown in FIG. As described with reference to FIG. 11, a
total of 12 diaphragms 11 ′ are formed by the 11 diaphragm segments 12 and the one
diaphragm segment 12 ′ corresponding to the bottom side, and this diaphragm 11 ′ Are
connected in a substantially spherical shape via a plurality of edge portions 12 f and a plurality
of edge members 14 respectively formed between the adjacent diaphragm segments 12 and 12
′, the diaphragm segments 12 are formed on all faces of a polyhedron. , 12 'provided Rotation
plate 11 'polygon-shaped diaphragm assembly 11A in 12 surface only' is assembled.
[0165]
Also in the sixth embodiment, as in the third embodiment, when forming the above-described
polyhedral pentagonal diaphragm (polyhedral polygonal diaphragm) 11 'into a substantially
spherical shell shape, it was previously shown in FIG. Thus, a method of connecting in advance
eleven diaphragm segments 12 and one diaphragm segment 12 'corresponding to the bottom
surface, and one diaphragm segment 12 corresponding to the eleven diaphragm segments 12
and bottom surface The '' may be separated and attached to the respective speaker drive units
20E and 20F to be described later, and then the 12 diaphragm segments 12 and 12 'may be
joined.
12-05-2019
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[0166]
Therefore, the external shape of the electroacoustic transducer 10F of the sixth embodiment is
the same as the electroacoustic transducer 10C of the third embodiment described above with
reference to FIG.
[0167]
Here, as shown in FIG. 26, in the case where the wiring / supporting pipe member 15 is attached
to a portion to be the bottom surface of the electroacoustic transducer 10F according to the
above, one diaphragm corresponding to the bottom surface side A pipe insertion hole 12a1 is
formed in the concave spherical portion 12a of the segment 12 'so as to substantially coincide
with the outer diameter of the pipe member 15 with the center axis O of the diaphragm segment
12' as a center.
[0168]
At this time, a nonmagnetic material such as an aluminum material or a resin material is used as
a material of the pipe member 15 in order to insert the inside of one speaker drive unit 20F
attached to the inner surface side of one diaphragm segment 12 '. .
[0169]
Further, a tubular shock absorbing material 41 formed into a tubular shape using felt or cloth is
adhered along the outer periphery of the pipe insertion hole 12a1 to the inner surface of the
concave spherical portion 12a formed in one diaphragm segment 12 ', and the diaphragm
segment The tubular cushioning member 41 is rockable in the central axial direction integrally
with 12 ', and when the pipe member 15 is inserted into the pipe insertion hole 12a1, the
vibration is generated from the gap between the pipe member 15 and the pipe insertion hole
12a1. It is provided to prevent air on the inner surface side of the plate segment 12 'from leaking
to the outside.
[0170]
Further, the electro-acoustic transducer 10F of the sixth embodiment includes the eleven
speakers described in the fourth embodiment (or the fifth embodiment) on the inner surface side
of each of the diaphragm segments 12 corresponding to the eleven diaphragm segments 12. The
drive units 20D (or 20E) are concentrically mounted centering on the central axis O of each
diaphragm segment 12, and further, on the inner surface side of one diaphragm segment 12
'corresponding to the bottom surface side, 11 units are provided. A single speaker drive unit 20F
12-05-2019
41
having a partially different structure from the speaker drive unit 20D (or 20E) is concentrically
mounted about the central axis O of the diaphragm segment 12 ′, and this single speaker drive
unit 20F One diaphragm segment 12 'can be vibrated in the same manner as the eleven
diaphragm segments 12.
[0171]
Furthermore, 11 pentagonal pyramids (speaker mounts) 52 to which 11 loudspeaker drive units
20D (or 20E) are respectively attached, and pentagonal pyramids 52 to attach one loudspeaker
drive unit 20F corresponding to the bottom side A 12-sided multifaceted mounting assembly 51
'by one pentagonal pyramid (speaker mounting) 52' formed in the same shape is joined
substantially spherically as in the fourth and fifth embodiments.
At this time, one pentagonal pyramid (speaker mount) 52 'has a shape of the upper surface 52a
for guiding the wiring wire from each of the speaker drive units 20D (or 20E) and 20F to the
wiring and supporting pipe member 15. Only a part of the 11 pentagonal pyramids (speaker
mounts) 52 is different.
[0172]
The above-described one speaker drive unit 20F has a partial shape for attaching the pipe
member 15 to the yoke 21, the magnet 22, and the pole piece 23 among the constituent
members of the eleven speaker drive units 20D (or 20E). Are different.
[0173]
Specifically, in each component of one speaker drive unit 20F, the yoke 21 has a screw hole 21c2
in which a screw portion 15a formed at one end of the pipe member 15 is screwed to the bottom
surface 21c. It penetrates centering on central axis O of 12 ', and is formed.
[0174]
Further, in the magnet 22 and the pole piece 23, the respective pipe insertion holes 22b, 23b for
inserting the pipe member 15 are made to substantially match the outer diameter of the pipe
member 15 with the central axis O of the diaphragm segment 12 'as a center. It is formed
through.
12-05-2019
42
[0175]
Therefore, the pipe member 15 is inserted from the pipe insertion hole 12a1 formed in the
concave spherical surface portion 12a of one diaphragm segment 12 'corresponding to the
bottom surface side of the electroacoustic transducer 10F, and one end side of the pipe member
15 is further After inserting through the pipe insertion holes 22b and 23b formed in the magnet
22 and the pole piece 23, the screw portion 15a formed at one end of the pipe member 15 is
screwed into the screw hole 21c2 formed in the bottom surface 21c of the yoke 21. As a result,
the pipe members 15 are fixed to the yoke 21 and the lead wires 25a of the plurality of voice
coils 25 are passed through the wiring grooves 52a2 formed narrow in the pentagonal surface
52a of one pentagonal pyramid 52 '. It is inserted into the member 15 and pulled out to the
outside.
[0176]
Also in the sixth embodiment, each pentagonal surface of the twelve pentagon frustum 52A of
the twelve speaker drive units 20D (or 20E) and 20F described with reference to FIG. 23 (b) in
the fourth embodiment. You may attach to 52a, respectively.
[0177]
Furthermore, in the sixth embodiment, one end of the pipe member 15 is fixed to the bottom
surface 21c of the yoke 21 in the speaker drive unit 20F substantially as in the third
embodiment, but the present invention is not limited thereto. It is also possible to fix one end of
the pentagonal surface 52a of one pentagonal pyramid 52 (or the pentagonal surface 52a of one
pentagonal frustum 52A) after inserting the central portion of the yoke 21 in the speaker drive
unit 20F.
[0178]
As described above, in the diaphragm 11 'in the sixth embodiment, the eleven diaphragm
segments 12 and one diaphragm segment 12' corresponding to the bottom surface side are
connected to be provided on all the faces of the polyhedron. Since the diaphragm segments 12
and 12 'vibrate respectively, the vibration characteristics of the diaphragm 11' can be further
improved as compared with the fourth and fifth embodiments.
[0179]
In the sixth embodiment, the case where the pipe member 15 is attached to the diaphragm
segment 12 'corresponding to the bottom surface side of the electroacoustic transducer 10F has
been described, but the embodiment described above with reference to FIGS. 14 and 15 As in the
first and second application examples, in the case where a plurality of electroacoustic
12-05-2019
43
transducers 10F are connected via the wiring / support pipe member 15, some of the twelve
diaphragm segments 12, 12 'are connected. A pipe insertion hole 12a1 for inserting the pipe
member 15 is formed at a central portion, and each speaker driving unit 20F of the above shape
is provided for each diaphragm segment 12 'of the above shape to which each pipe member 15 is
attached Should be attached.
[0180]
Furthermore, as shown in FIG. 26, in the electroacoustic transducer 10F of the sixth embodiment
according to the present invention, the case where the multifaceted diaphragm assembly 11A 'is
relatively large, or in the multifaceted diaphragm assembly 11A'. When each edge member 14 is
formed of a soft member, each diaphragm segment 12 (or each diaphragm segment 12 (or 12 ′)
in the multi-faceted diaphragm assembly 11A ′ is not distorted by its own weight. Or each
pentagonal pyramid 52 (or 20 ') to which each speaker drive unit 20D (or 20E) or (20F) opposite
to the bonding site of each side on the inner surface side of 12') and each diaphragm segment 12
(or 12 ') A plurality of diaphragm connecting members 54 for connecting the pentagonal surface
52a of 52 ') are attached as necessary.
[0181]
Here, as shown in FIGS. 27 (a) to 27 (c), the above-described diaphragm connecting member 54
is not affected by the vibration of each diaphragm segment 12 (or 12 ') constituting the
diaphragm 11' (FIG. 26). It is formed using a material such as urethane rubber which has a
flexibility greater than that of each diaphragm segment 12 (or 12 ') so as not to adversely affect
it.
[0182]
In the diaphragm connecting member 54, the bottom surface 54a is formed in a pentagonal
shape substantially in conformity with the external dimensions of the pentagonal surface 52a of
the pentagonal pyramid 52 (or 52 '), and is attached to the lower surface side of the speaker
housing 53 in the bottom surface 54a. A circular relief hole 54a1 for escaping the yoke 21 is
formed through it.
[0183]
Also, five inclined surfaces 54b are formed so as to gradually spread outward from each side of
the bottom surface 54a of the diaphragm connecting member 54 toward each side of the
diaphragm segment 12 (or 12 '), The respective inclined surfaces 54b are connected to each
other, and rectangular relief holes 54b1 for reducing the rigidity are formed in the respective
inclined surfaces 54b so as to penetrate therethrough.
12-05-2019
44
[0184]
Then, the bottom surface 54a of the diaphragm connecting member 54 is attached to the
pentagonal surface 52a of the pentagonal pyramid 52 (or 52 ') using an adhesive, and the end of
each inclined surface 54b is the diaphragm segment 12 (or 12') The adhesive is used from the
inner surface side to the edge portion 12f (FIG. 18), which is the joint portion of each side of the
frame, and the edge member 14.
[0185]
Furthermore, in the sixth embodiment, the end of each inclined surface 54b of the diaphragm
connecting member 54 is bonded across all the sides of the diaphragm segment 12 (or 12 ′),
but the present invention is not limited thereto. A diaphragm connecting member having a shape
capable of partially supporting only a central portion of each side of the diaphragm segment 12
(or 12 ′) or only both end portions of each side of the diaphragm segment 12 (or 12 ′) It is
good.
[0186]
In the multi-faced diaphragm assembly 11A 'in which the diaphragms 11' having a total of 12
diaphragm segments 12 and 12 'connected as described above are formed in a substantially
spherical shell shape, each diaphragm segment 12 and 12' is Since the inner surface side is
supported by the individual diaphragm connecting members 42, no deformation due to the
weight of each diaphragm segment 12 or 12 'in the multifaceted diaphragm assembly 11A'
occurs, so that good acoustic characteristics can be obtained.
[0187]
The technical idea of supporting the inner surface side of the diaphragm segment 12 by the
diaphragm connecting member 42 is substantially spherical shell of the diaphragm 11 in which
the eleven diaphragm segments 12 in the fourth and fifth embodiments described above are
connected. The present invention is also applicable to a multi-faceted diaphragm assembly 11A
(FIG. 21) formed in a shape of a circle.
[0188]
It is the perspective view which looked at the external shape of the electroacoustic transducer of
Example 1 which concerns on this invention from the front side.
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It is the perspective view which looked at the external shape of the electroacoustic transducer of
Example 1 which concerns on this invention from the bottom side.
FIG. 1 is a perspective view schematically showing a schematic configuration of an
electroacoustic transducer of Example 1 according to the present invention.
In the electroacoustic transducer of Example 1 which concerns on this invention, it is the top
view which expand | deployed and showed the diaphragm which connected the diaphragm
segment of 11 regular pentagons planarly.
It is the perspective view which expanded and showed the regular pentagonal diaphragm
segment shown in FIG.
In the electroacoustic transducer of Example 1 which concerns on this invention, it is the
longitudinal cross-sectional view which expanded and showed the state which assembled the
adjacent speaker drive unit.
(A) is the perspective view which expanded and showed the speaker housing shown in FIG. 6, (b)
shows the multi-faced speaker housing assembly which assembled several speaker housing and
one pentagonal plate for bottoms. FIG.
The electro-acoustic transducer of Example 1 which concerns on this invention WHEREIN: It is
the perspective view which showed the state which assembles the adjacent speaker drive unit.
In the electroacoustic transducer of Example 1 which concerns on this invention, when the
inclined surface part and large diameter circle of a diaphragm segment are not eccentric, it is a
figure for demonstrating standing wave distribution of the diaphragm segment surface.
In the electroacoustic transducer of Example 1 which concerns on this invention, when the
inclined surface part and large diameter circle of a diaphragm segment are eccentric, it is a figure
for demonstrating standing wave distribution of a diaphragm segment surface.
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In the electroacoustic transducer of Example 1 which concerns on this invention, it is the figure
which showed the frequency characteristic of the reproduction | regeneration sound by a
diaphragm segment.
It is the figure which showed the frequency characteristic of the synthetic | combination
reproduction | regeneration sound in the electroacoustic transducer of Example 1 which
concerns on this invention.
It is the figure which showed the directional characteristic of the electroacoustic transducer of
Example 1 which concerns on this invention.
It is the perspective view which showed the application example 1 of the electroacoustic
transducer of Example 1 which concerns on this invention.
It is the perspective view which showed the application example 2 of the electroacoustic
transducer of Example 1 which concerns on this invention.
It is the perspective view typically shown in order to demonstrate the electroacoustic transducer
of Example 2 which concerns on this invention.
It is the perspective view which looked at the external shape of the electroacoustic transducer of
Example 3 which concerns on this invention from the bottom side.
In the electroacoustic transducer of Example 3 which concerns on this invention, it is the top
view which expand | deployed and showed the diaphragm which connected the diaphragm
segment of 12 regular pentagons planarly.
In order to demonstrate the electroacoustic transducer of Example 3 which concerns on this
invention, it is the perspective view which made the bottom face side as a main and partially
fractured | ruptured schematically.
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(A) to (c) are attached as needed in the electro-acoustic transducer according to the third
embodiment of the present invention, in order to connect the bonding portion of each side on the
inner surface side of the diaphragm with the speaker housing It is the perspective view shown in
order to demonstrate a diaphragm connection member.
It is the perspective view which showed the schematic structure of the electroacoustic transducer
of Example 4 which concerns on this invention typically.
The electroacoustic transducer of Example 4 which concerns on this invention WHEREIN: It is the
longitudinal cross-sectional view which expanded and showed the state which assembled the
adjacent speaker drive unit.
The electroacoustic transducer of Example 4 which concerns on this invention WHEREIN: (a) is
the perspective view which expanded and showed the pentagonal pyramid in a polyhedral
mounting assembly, (b) is in a polyhedral mounting assembly. It is the perspective view which
expanded and showed the pentagonal frustum of.
FIG. 5 is a perspective view showing a multifaceted mounting assembly in which a plurality of
pentagonal pyramids are assembled.
It is the perspective view typically shown in order to demonstrate the electroacoustic transducer
of Example 5 which concerns on this invention.
In order to demonstrate the electroacoustic transducer of Example 6 which concerns on this
invention, it is the perspective view which made the bottom face side as a main and partially
fractured | ruptured schematically.
(A) to (c) are attached as needed in the electro-acoustic transducer of the sixth embodiment
according to the present invention, in order to connect the joining portion of each side on the
inner surface side of the diaphragm with the pentagonal pyramid It is the perspective view
shown in order to demonstrate a diaphragm connection member.
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It is the perspective view which showed an example of the conventional point sound source nondirectional speaker system.
It is the block diagram which showed an example of the conventional point sound source nondirectional speaker system.
It is the characteristic view which showed typically the example of the peak and dip of the
frequency response in the speaker unit used for the conventional point sound source nondirectional speaker system.
Explanation of sign
[0189]
10A: electro-acoustic transducer of Example 1 10 B: electro-acoustic transducer of Example 2 10
C: electro-acoustic transducer of Example 3 10 D: electro-acoustic transducer of Example 4 10 E:
Example 5 Electro-acoustic transducer, 10 F: electro-acoustic transducer of the sixth embodiment
11: diaphragm in the first, second, fourth and fifth embodiments (11 faces) 11 ′ diaphragm in
the third and sixth embodiment (12 11A: multi-faceted diaphragm assembly in Examples 1, 2, 4,
5 11A ′: multi-faced diaphragm assembly in Examples 3, 6 12: diaphragm segment 12a:
concave spherical surface Parts, 12a1 ... Pipe insertion holes, 12b ... Convex ring parts, 12c ...
Inclined surface parts, 12d ... Large diameter circles, 12e ... Flat surface parts, 12f ... Edge parts,
13 ... Bases, 13a ... Through holes, 14 ... Edge members, 15: Pipe member for wiring and support,
20A: Speaker of Example 1 Dynamic unit, 20B: speaker drive unit with diaphragm according to
the second embodiment 20C: one speaker drive unit according to the third embodiment 20D:
speaker drive unit according to the fourth embodiment 20E: speaker drive with diaphragm
according to the fifth embodiment Unit 20F: One speaker driving unit in Example 6, 21: Yoke,
21a: circular recess, 21b: ring-shaped outer wall, 21c: bottom, 22: magnet, 23: pole piece, 24:
bobbin, 24a: One end, 24b: the other end, 25: voice coil, 26: multi-faced speaker housing
assembly in Examples 1 to 3, 27: speaker housing in Examples 1 to 3, 27a: outer peripheral side,
27a: pin Part, 27a2 ... Pin fitting hole, 27b ... Upper surface, 27c ... Lower circular recess, 27d ...
Through hole, 27e ... Upper circular recess, 27f ... Arc-shaped notches for air flow, 28: support
plate (pentagonal plate), 29: first suspension, 30: spacer, 31: second suspension, 41: tubular
buffer member in embodiments 3, 6 The diaphragm connecting member in the third embodiment
51 The multifaced mounting assembly in the fourth embodiment The multifaced mounting
assembly 51 in the sixth embodiment 52 The second embodiment Speaker mount (pentagon
pyramid), 52A: speaker mount in embodiments 4 and 5 (pentagon frustum), 52 ′: one speaker
mount in embodiment 6 (pentagon), 52a: polygonal surface (Pentagonal surface), 52b: outer
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peripheral side, 52b1: pin portion, 52b2: pin fitting hole, 53: speaker housing in Examples 4 to 6,
53a: outer peripheral side, 53b: upper surface, 53c: lower circular recess, 53d ... through hole,
53e ... upper circular recess, 54 Diaphragm coupling member in Example 6, D ... dips, peaks of P
... One of the reproduced sound, PG ... peak of the composite sound data, O ... center axis of the
diaphragm, OH ... eccentric shaft of the diaphragm.
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