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JP2005159409

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2005159409
PROBLEM TO BE SOLVED: To provide a speaker diaphragm in which the amount of vibration of
the diaphragm can be increased without increasing the thickness in the radiation direction of
sound, and a speaker using the speaker diaphragm. SOLUTION: A magnetic circuit 19 comprising
a diaphragm main body 11, a yoke 16, a magnet 17 and a plate 18 which are constituted by
plate-like members 12 and 13 so as to be substantially V-shaped in side view; A diaphragm
comprising a driver X composed of a voice coil 21 and a damper 20 disposed around the
periphery and a frame 23 attached to the magnetic circuit 19 of the driver X, the diaphragm
being at least bifurcated One end of the main body 11 is connected to the bobbin 22 of the voice
coil 21 constituting the driving body X to form a speaker 10. [Selected figure] Figure 1
Speaker diaphragm and speaker using this diaphragm
[0001]
The present invention relates to a speaker diaphragm for use in various audio devices and a
speaker using the diaphragm. More specifically, the present invention relates to a diaphragm for
a diaphragm without increasing the thickness in the radiation direction of sound. The present
invention relates to a speaker diaphragm capable of increasing the amount of vibration, and a
speaker using the diaphragm.
[0002]
The conventional speaker 1 is, as shown in FIG. 10, a vibration comprising the magnetic circuit 5
comprising the yoke 2, the magnet 3 and the plate 4 and the voice coil 6, the diaphragm 7 and
the damper 8 provided around the magnetic circuit 5. System and a frame 9 fixed to the
magnetic circuit 5, which is assembled so as to stack the magnetic circuit 5 to the cone paper
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1
which is the diaphragm 7, the sound radiation direction is voice, It is the same as the drive
direction of the coil.
[0003]
Therefore, while eliminating the need for a fixed structure in which the drive unit and the
diaphragm approach each other, the signal transmission path leading to the sound generation is
made less susceptible to external shocks, and the degree of freedom in structure and installation
A speaker that can be improved and that can ensure more appropriate sounding operation,
application to various applications, and the like is proposed in Japanese Patent Laid-Open No.
2000-350285 (Patent Document 1).
[0004]
The speaker described in Patent Document 1 supports a diaphragm, a drive unit generating a
force according to the sound to be generated, and the diaphragm supported in a state of internal
stress and a force generated by the drive unit. And transmitting the wave generated by the
vibration to the diaphragm. Specifically, the paper is elastically deformed to a state in which the
internal stress exists, and is supported at two points by the tip of the support member and the
clamping portion, One end of the support column is connected to the clamping portion, and the
other end is connected to a predetermined portion of the speaker drive portion in the drive
portion box.
[0005]
Then, at the predetermined portion, a disk receiving a force by the voice coil is provided in a
state in which the vibration is suppressed, an electric signal is supplied to the voice coil to
generate a force on the disk, and a wave generated thereby is supported It is transmitted to the
paper through the clamping portion and the support member, and is converted into mechanical
vibration by the paper to emit a sound.
Unexamined-Japanese-Patent 2000-350285 (Claims, FIG. 1)
[0006]
In the loudspeaker described in Patent Document 1, the diaphragm is supported in a state of
internal stress, and “waves” generated by the force generated by the drive unit are transmitted
to the diaphragm, so that it is intended to generate Sound is transmitted in the form of a wave
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and converted into mechanical vibration by the diaphragm, so the drive part and the diaphragm
do not need to be close to each other and can be configured in a free form. It is said that the
effect of being able to improve the freedom degree of a structure and installation is acquired.
[0007]
However, since the drive unit and the diaphragm are connected by the support post, it is
necessary to design the speaker taking into consideration the weight and size of the drive unit for
supporting the vibration unit. There are various issues to be solved in order to achieve
miniaturization and / or thinning.
[0008]
That is, in the loudspeaker described in Patent Document 1, a wave is transmitted from the disk
joined to the voice coil to the narrowing portion through the thin supporting column, and elastic
deformation is caused between the tip of the supporting column and the narrowing portion. Since
the paper (diaphragm) fixed and fixed is vibrated, it is a phenomenon such as so-called
resonance, so to reliably vibrate the diaphragm, the corresponding large size according to the
size of the diaphragm It is quite difficult to reduce the size and / or thickness of the speaker by
requiring a drive source.
[0009]
Further, in the speaker described in Patent Document 1, it is an essential condition to elastically
deform the paper (diaphragm), and if the internal stress is small, the effect as the diaphragm can
be exhibited. If the internal stress is increased to increase the effect as a diaphragm, the strength
of the support column supporting the paper (diaphragm) is increased to prevent the paper
(diaphragm) from returning to the state without internal stress. The necessity arises, and there is
a problem that the shapes of the paper (diaphragm) and the support columns approach a fixed
state and can not vibrate as the internal stress becomes stronger.
[0010]
On the other hand, in recent years, in the demand for speakers, it has been required to increase
the amount of vibration of the diaphragm with respect to the amount of movement of the voice
coil without increasing the thickness in the radiation direction of sound. For example, since the
amount of vibration of the diaphragm with respect to the amount of movement of the voice coil
is the same, in order to increase the amount of vibration of the diaphragm, the magnetic circuit
and the vibration system must be enlarged to increase the amount of movement of the voice coil.
As a result, since the radiation direction of the sound is the same as the driving direction of the
voice coil, it is extremely difficult to meet the requirement because the thickness in the radiation
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direction of the speaker becomes large.
[0011]
In view of such a present situation, the present invention provides a speaker diaphragm capable
of increasing the amount of vibration of the diaphragm without increasing the thickness in the
radiation direction of sound, and a speaker using the speaker diaphragm. The purpose is to
[0012]
In order to achieve the above object, the speaker diaphragm of the present invention comprises a
main body of a V-shaped diaphragm mainly in a side view by a plate-like body, and at least one
plate of the above-mentioned diaphragm main that bifurcated. The end portion of the body is
characterized in that it is used as a connecting portion of the voice coil to the bobbin.
[0013]
The invention according to claim 2 of this invention is characterized in that, in the speaker
diaphragm according to claim 1, the diaphragm main body is constituted by two flat plates facing
each other, and the upper end portion of each flat plate is It is characterized in that they are
attached to each other so that the side view is substantially V-shaped.
[0014]
The invention according to claim 3 of this invention is the diaphragm for a speaker according to
claim 1, wherein the diaphragm main body bends one flat plate to be substantially V-shaped in a
side view. In addition, it is characterized in that the bent portions are bonded to each other.
[0015]
Also, in the invention according to claim 4 of this invention, in the speaker diaphragm according
to any one of claims 1 to 3, the main body of the diaphragm is the same material on both sides
constituting substantially V-shape. It is characterized by
[0016]
The invention according to claim 5 of this invention is characterized in that, in the speaker
diaphragm according to claim 1 or 2, the diaphragm main body has one side and the other side
forming a substantially V shape, It is characterized in that the materials are different from each
other.
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[0017]
In the sixth aspect of the present invention, in the speaker diaphragm according to any one of the
first to fifth aspects, the diaphragm main body is an end portion of the other plate-like body
bifurcated. The speaker is characterized in that it is used by being fixed to a frame that
constitutes the speaker.
[0018]
The invention according to claim 7 of this invention is the diaphragm for a speaker according to
any one of claims 1 to 5, wherein the vibration main body is an end portion of each plate-like
body bifurcated into a voice. It is characterized in that it is used as a connecting portion of a coil
with a bobbin.
[0019]
Further, according to an eighth aspect of the present invention, there is provided a loudspeaker
main body comprising a plate-like body having a substantially V-shaped side view, a yoke, a
magnet, a magnetic circuit comprising the plate, and the magnetic circuit. And a frame attached
to the magnetic circuit of the driving body, wherein at least one of the two main branches of the
diaphragm is provided. An end portion of the plate-like body is connected to a bobbin of a voice
coil constituting the driving body.
[0020]
The invention according to claim 9 of this invention is the speaker according to claim 8, wherein
the diaphragm main body is fixed to the frame at the other end of the bifurcated plate-like body.
It is characterized by
[0021]
The invention according to claim 10 of the present invention is the speaker according to claim 8,
wherein the driving body is constituted by a plurality, and at least one end portion of a bifurcated
plate member is driven by each driving means. It is characterized in that it is configured to be
driven simultaneously by the body.
[0022]
The invention according to an eleventh aspect of the present invention is the speaker according
to the eighth aspect, wherein the driving body is constituted by a plurality of the same structure,
and each end of the bifurcated plate member is respectively It is characterized in that it is
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configured to be driven simultaneously by the driving body of
[0023]
The invention according to claim 12 of this invention is the speaker according to claim 11. In the
speaker according to claim 11, the plurality of driving bodies are: a voice coil winding for driving
one end of a diaphragm main body divided into two branches; It is characterized in that the
direction and the winding direction of the voice coil for driving the other end portion are
opposite to each other.
[0024]
The invention according to claim 13 of this invention is the speaker according to claim 11,
wherein the plurality of drive bodies constitute a drive body for driving one end of a diaphragm
main body branched into two branches. The magnetizing direction of the magnet of the magnetic
circuit and the magnetizing direction of the magnet of the magnetic circuit constituting the
driving body for driving the other end are opposite in phase to each other.
[0025]
The invention according to claim 14 of the present invention is the speaker according to any one
of claims 8 to 11, wherein the diaphragm main body is a magnetic circuit in which a bifurcated
upper edge forms a driver. It is characterized in that it is fixed via an edge to a support frame
attached thereto.
[0026]
Furthermore, according to a fifteenth aspect of the present invention, there is provided a
loudspeaker according to a fifteenth aspect of the present invention, comprising: a pair of
diaphragm main bodies composed of a plate-like body so as to be substantially V-shaped in side
view; The drive unit includes a voice coil and a damper disposed around the magnetic circuit, and
a frame attached to the plate and the yoke of the magnetic circuit, and is bifurcated in the one
diaphragm main body And the other end is fixed to the frame attached to the plate of the
magnetic circuit, and the other vibration is connected to the cap fixed to the top of the bobbin of
the voice coil constituting the drive body. The other bifurcated end of the plate main body is
fixed to a frame attached to the back of the yoke of the magnetic circuit, and one end is A
through hole is axially connected to the center of a center pole provided in the yoke and
connected to the base end of a connecting rod loosely fitted, and the tip of the connecting rod is
fixed to the back center of the cap; It is characterized in that a pair of diaphragm main bodies,
which are arranged point-symmetrically with respect to a circuit, are simultaneously vibrated by
driving a voice coil.
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[0027]
The invention according to claim 16 of the present invention is the speaker according to claim
15, wherein the pair of diaphragm main bodies are configured to simultaneously vibrate by voice
coils of a plurality of driving bodies having the same structure. It is characterized by the fact that
[0028]
The invention according to claim 17 of the present invention is the speaker according to claim
15, wherein the connecting rod is formed of a hollow or solid rod-like body or a plate-like body,
from the bottom of the yoke It is characterized in that the projecting portion is engaged and held
so as to be vertically movable by a damper.
[0029]
The speaker diaphragm according to the present invention comprises a diaphragm main body
whose side view is substantially V-shaped (including an inverted V-shape or an isosceles triangle
or the like) by a plate-like body made of a diaphragm material. The end of at least one plate-like
body which bifurcates at the upper end of the plate main body can be used as a diaphragm by
connecting it to a voice coil, and the vibration direction and vibration of the voice coil It becomes
possible to obtain a speaker having a structure that is different by about 90 degrees from the
vibration direction of the plate.
[0030]
Further, the loudspeaker according to the present invention is mainly composed of a diaphragm
main body whose side view is substantially V-shaped (including an inverted V-shape or an
isosceles triangle or the like) by a plate-like body made of a diaphragm material. Since the end of
at least one plate-like body that bifurcates at the upper end of the main body is connected to the
bobbin of the voice coil disposed at the periphery of the magnetic circuit, the vibration direction
of the voice coil and The structure in which the vibration direction of the diaphragm is different
by about 90 degrees can be made, thereby increasing the vibration amount of the diaphragm
with respect to the movement amount of the voice coil without thickening the thickness of the
sound of the speaker in the radiation direction. It can be done.
[0031]
According to the present invention, a diaphragm material made of a plate body is formed to be
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substantially V-shaped in side view and mainly used as a diaphragm, and at least one end portion
of the bifurcated plate member is a yoke, a magnet A drive circuit composed of a magnetic circuit
consisting of a plate and a plate, a voice coil and a damper arranged around the magnetic circuit,
and connected to a bobbin of the voice coil to form a diaphragm, and this diaphragm is used
Therefore, various modifications can be made without departing from the scope of the present
invention, and the present invention is not limited to only the embodiments described later.
As is apparent from FIGS. 1 and 2, the diaphragm 11 for a speaker according to the present
invention is mainly V-shaped in a side view and has a rectangular shape in a plan view (here, the
speaker vibration 11 As it is substantially the same as the plate, it has the same sign.
In order to form the diaphragm main body 11 with a plate-like body, for example, two square or
rectangular plate-like bodies 12 and 13 are made to face each other, and their upper edges are
Are bonded together with a desired width by an adhesive to form a bonding portion 14 so that
the side view is substantially V-shaped, and as shown in FIG. Is folded in almost at the center
portion, and portions overlapping each other are bonded with an adhesive to form a bonding
portion 14a, and a diaphragm main body 11 having a substantially V shape in side view is
available.
[0032]
The method of using the former two plate-like members 12 and 13 is to use the material of the
plate-like body, that is, paper pulp as the material of the diaphragm, or a metal single plate such
as aluminum, beryllium or boron, nickel or the like These metal foams and various plastics can be
used singly or in combination.
[0033]
In addition, the vibration mode of the diaphragm can be freely controlled by changing the
thickness of the same material, or by combining different materials.
Furthermore, the latter method of using the single plate-like member 15 is extremely easy to
manufacture the diaphragm main body 11, and the cost can be reduced by mass production.
[0034]
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The thickness of the plate-like body constituting the diaphragm main body 11 is about 0.2 to 1.0
mm, and if the side view is substantially reverse V-shaped, the size and the shape are particularly
limited. It can be selected appropriately according to the speaker to be applied.
[0035]
Further, when the diaphragm main body 11 is constituted by the two plate-like members 12 and
13 as described above, naturally, one having a different thickness can be used, and one end of
the diaphragm main body 11 branched into two is for convenience. Assuming that the plate-like
body 12 connected to the voice coil is the driving portion A, the other plate-like body 13
constitutes the vibrating portion B, so that the area is larger than the plate-like body 12
constituting the driving portion A. However, it is natural that the same area may be used.
[0036]
In addition, when forming the diaphragm main body 11 with a single plate-like body or two
plate-like bodies, in any case, bonding and bonding with a predetermined width along the upper
edge portion is carried out By forming (14a), the vibration from the drive unit A can be reliably
transmitted to the entire surface of the vibrating unit B, and at least the plate-like member 13
serving as the vibrating unit B deforms the plate surface and vibrates. Although it is preferable
that the entire surface is flat and smooth as needed, a rib may be provided from the viewpoint of
suppressing resonance of the diaphragm.
[0037]
The speaker diaphragm 11 having such a configuration is connected to the voice coil 21 at least
one end bifurcated by the bonding part 14, specifically the base end 12a of the plate-like body
12 held almost vertically. As a diaphragm, a specific example will be described below.
[0038]
The speaker 10 shown in FIG. 1 includes the speaker diaphragm 11 having the above
configuration, a yoke 16 having a center pole 16a at the center of the upper surface, a magnetic
circuit 19 including a ring-shaped magnet 17 and a ring-shaped plate 18. The voice coil 21 held
by the damper 20 in the magnetic gap formed in the magnetic circuit 19, the bobbin 22 around
which the voice coil 21 is wound, and the frame 23 fixed to the upper surface of the plate 18 of
the magnetic circuit 19 The base end 12a of one plate-like body 12 constituting the speaker
diaphragm 11 is connected and fixed to the bobbin 22 of the voice coil 21 to form a driving
portion A, and the other plate-like body 13 The base end 13 a of the speaker 10 is fixed to the
frame 23 to form the vibrating portion B, and the speaker 10 is obtained.
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[0039]
In the present invention, among the components constituting the speaker, the magnetic circuit
19 and the voice coil 21 and the damper 20 disposed around the magnetic circuit 19 are
collectively referred to as a driver X.
[0040]
In the speaker 10 having such a configuration, although an electric signal is input from the input
terminal to the voice coil 21 via a tinsel wire, although not shown, the bobbin 22 is moved up
and down by driving the voice coil 21, and the base end 12a is fixed to the bobbin 22. The platelike body 12 of the diaphragm main body 11 to be the drive portion A also operates up and down
simultaneously.
[0041]
As a result, the plate-like member 13 substantially integrated with the vibration B portion
through the bonding portion 14 operates (vibrates) to the left and right in the drawing, as is
apparent from the vibration schematic diagram of FIG. As a result, the amount of vibration H to
the left and right of the end of the plate-like member 13 with respect to the amount of movement
h of the voice coil 21 becomes large and is emitted.
Therefore, the vibration of the plate-like member 13 (the vibrating portion B) can be increased by
the vibration of the voice coil 21 without increasing the thickness in the radiation direction of the
sound of the speaker.
[0042]
As for the fixing means of the base end of either of the plate-like members 12 or 13 constituting
the diaphragm main body 11 to the upper end portion of the bobbin 22 of the voice coil 21, both
are securely integrated integrally. There is no particular limitation if it is present, for example,
slits are formed in the longitudinal direction at opposite positions on the diameter of the bobbin
12 having the required diameter, for example, and the base end 12a of the plate 12 is engaged in
this slit There is a method of bonding the two integrally with an adhesive, or fixing a cap to the
upper end opening of the bobbin 22 and adhesively fixing the base end of the plate to the
surface of the cap.
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[0043]
In addition, although the plate-like body 13 which substantially constitutes the vibrating portion
B may hold the space from the bonding portion 14 to the frame 23 in a planar shape, as shown
in FIG. By forming it in an arc shape, the area of the vibrating portion that vibrates can be
increased, and vibration noise can be more effectively radiated to the air, which is preferable.
[0044]
In the speaker 30 shown in FIG. 5, the speaker diaphragm 11 is composed of a magnetic circuit
19 including a yoke, a magnet, and a plate, and two driving units including a voice coil and a
damper disposed around the magnetic circuit 19. The plates 18 and 18 of the magnetic circuit
constituting each of the driving bodies X and Y are connected to each other on the same line by
one frame 23, and each driving is performed. The base end of one plate-like body 12 constituting
the diaphragm main body 11 is fixed on the same line to the bobbin of the voice coil constituting
the bodies X and Y to form the drive portion A, and the base end of the other plate-like body 13
Is fixed to the frame 23 to form a vibrating portion B.
[0045]
The drivers X and Y have the same size and configuration.
[0046]
The speaker 30 of this type can vibrate the entire surface of the vibrating portion B uniformly by
selecting the number of drivers according to the width of the speaker diaphragm to be used, and
the individual drivers X and Y. The speaker can be made thinner by miniaturizing the magnetic
circuit and the vibration system such as the voice coil and the damper.
[0047]
The speaker 40 shown in FIG. 6 is a voice coil in the driver Y which is different from the driver X
located at the base of the driver A in the base end of the vibrating part B (plate 13) in the first
embodiment. It is a structure fixed to the bobbin 22a of 21a.
[0048]
That is, the drive part A is fixed to the bobbin 22 which is the voice coil 21 of the drive body X,
and the vibration part B has the same configuration as the drive body X and the same size as that
of the drive body X The driving members X and Y are fixed to the connecting frame 24 in a state
fixed to 22a.
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[0049]
In the speaker 40 having such a configuration, for example, assuming that the winding directions
of the voice coils of the drivers X and Y are opposite to each other, the vibrating portion B is
lowered when the driving portion A is raised by the driving of the voice coil 21 (solid arrow In
contrast, when the vibrating portion B is raised by the driving of the voice coil 21a, the driving
portion A can be lowered (indicated by the dotted arrow), so that the base end of the vibrating
portion B is attached to the frame 23 as in the first embodiment. Compared to the case of fixing,
it is possible to make the left and right vibration amount of the vibrating portion B the same with
the movement amount of the voice coil of about 1/2.
[0050]
Further, in the third embodiment shown in FIG. 6, the magnetization direction of the magnet 17a
of the magnetic circuit constituting the driving body X and the magnetization direction of the
magnet 17b of the magnetic circuit constituting the driving body Y are opposite in phase to each
other. By doing so, the same effects as those described above can be obtained.
[0051]
Furthermore, when driving the speaker diaphragm 11 that is bifurcated at the upper end portion,
in the example of FIG. 6, the driving portion A and the vibrating portion B are driven by one
driving body X and Y, respectively. As shown in the second embodiment, by vibrating the drive
unit A and the vibration unit B with a plurality of drivers, the entire surface of the vibration unit
B can be uniformly vibrated, and the individual magnetic circuits and the vibration system are
miniaturized. The speaker can be made thinner.
[0052]
FIG. 7 shows still another example of the speaker diaphragm according to the present invention,
wherein the vibrating portion B of the diaphragm main body 11 shown in FIG. 1 and FIG. In FIG.
7, the upper end portions of the opposing plate-like members 12 and 13 are bonded to each
other while the internal stress is slightly applied to the The diaphragm main body 11 is formed
so as to be triangular or V-shaped, and the vibration part B is set to be flat so that internal stress
does not act, and then the drive part A is driven by the voice coil 21. It is a thing.
[0053]
In this case, even if the form of the vibrating portion A is different from those in FIGS. 1 and 6,
the configuration in which the vibration by the voice coil is directly received as the vibration does
not change.
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[0054]
Therefore, with the speaker diaphragm 11 shown in FIG. 1 and FIG. 6, substantially the same
effect can be achieved with regard to the magnitude of the vibration.
[0055]
When the diaphragm main body 11 is set to the driving body X to be a speaker diaphragm, the
width between the base ends of the plate-like members 12 and 13 constituting the diaphragm
main body 11 is set to, for example, about 50 mm. Since it can be operated with a small power,
the diameter of the voice coil 21 can be reduced by that amount, and if the width is narrowed,
the diameter of the voice coil to be used needs to be increased a little, so Is preferably about 10
mm in width, or less than that, it is necessary to use a large drive for the magnetic circuit.
[0056]
In the speaker 50 shown in FIG. 8, the diaphragm main body 11 in the above-described
embodiment has the base end of the vibrating portion B fixed to the frame 23, while the bonding
portion of the upper end portion of the diaphragm main body 11 One end portion of the edge 26
is fixed to 14, and the other end portion of the edge 26 is fixed to a supporting frame 27
separately provided on the plate 18 of the driving body X.
[0057]
By using this edge 26, the driving part A and the vibrating part B can be more reliably held in the
correct position, and of the diaphragm main body 11 of the antiphase sound radiated to the rear
of the diaphragm main body 11. It is possible to prevent the wraparound to the front.
[0058]
A speaker 60 shown in FIG. 9 is one in which two diaphragm main bodies 11A and 11B are
arranged point-symmetrically with respect to a magnetic circuit on one driving body X, and a
speaker 60 shown in FIG. The center pole 16a is formed with a through hole penetrating up and
down along the central axis, and an angled frame 23a is similarly provided on the back surface
and a frame 23 is provided symmetrically on the upper surface of the plate 18 There is.
[0059]
The base end of the drive portion A in one diaphragm main body 11A is a vibration which
bifurcates at the bonding portion 14 to the cap 22a provided on the top of the bobbin 22 of the
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voice coil 21 constituting the drive body X. The base end of the portion B is fixed to the frame
23, the drive portion A of the other diaphragm main body 11B is formed on the frame 23a
attached to the back surface of the yoke 14, and the vibration portion B is formed on the center
pole 16a. The other end of the connecting rod 28 is loosely fitted in the through hole, and one
end is fixed to the other end of the connecting rod 28 fixed to the center of the back surface of
the cap 22 a of the bobbin 22.
[0060]
That is, the driving portion B of the second diaphragm main body 11B interlocks with the bobbin
22 via the connecting rod 28 which moves up and down in the through hole of the center pole
16a according to the driving of the voice coil 21. Therefore, with one drive body X, the drive
portion A of one diaphragm main body 11A and the vibration portion B of another diaphragm
main body 3 can be moved at the same time.
[0061]
At that time, the driver X may be plural.
In this case, the plurality of driving bodies X all have the same structure, and the driving portion
A of the diaphragm main body 11A and the vibrating portion B of the diaphragm main body 3
are simultaneously moved by a plurality of driving bodies. The vibrating portion B of the
diaphragm main body 11A to be fixed and the drive portion A of the diaphragm main portion
11B fixed to the frame 23a may also be driven by the respective driving members X without
being fixed to the frame.
[0062]
In FIG. 9, reference numeral 29 is a damper for engaging and holding the connecting rod 28 so
that the connecting rod 28 can move up and down. A through hole is formed in the center to
allow loose fitting of the lower end of the connecting rod 28 projecting from the through hole.
The connecting rod 28 may be a hollow or solid rod-like body or a plate-like body.
[0063]
As described above, in the speaker diaphragm of the present invention, vibration in a
substantially V shape (including an inverted V shape or an isosceles triangle shape or the like) in
a side view having a bonding portion at the upper edge by a plate member The main body of the
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plate is configured, and at least one of the bifurcated ends is driven by a voice coil to form a
diaphragm, and the speaker diaphragm is used to configure a speaker to emit sound. The amount
of vibration of the diaphragm can be increased without increasing the thickness in the direction.
[0064]
Therefore, there is an advantage that downsizing and thinning can be achieved by appropriately
selecting the size of the driving body, and the material and size of the diaphragm to be used.
[0065]
It is a schematic explanatory drawing which shows an example of the speaker which uses an
example of the speaker diaphragm of this invention.
It is a schematic front view of the speaker shown in FIG.
It is explanatory drawing which shows the other example of the speaker diaphragm concerning
this invention.
It is a vibration schematic diagram of the speaker shown in FIG.
It is a schematic front view which shows the other Example of the speaker concerning this
invention.
It is a schematic front view which shows the further another Example of the speaker concerning
this invention.
It is a schematic explanatory drawing which shows an example of the speaker which uses the
other example of the speaker diaphragm concerning this invention.
It is a schematic side view which shows the further another Example of the speaker concerning
this invention.
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It is a schematic side view which shows the further another Example of the speaker concerning
this invention.
It is a schematic explanatory drawing of the conventional speaker.
Explanation of sign
[0066]
DESCRIPTION OF SYMBOLS 10 Speaker 11 Speaker diaphragm (diaphragm main body) 12, 13
Plate-like body which mainly comprises a diaphragm 14 Bonding part 16 Yoke 17 Magnet 18
Plate 19 Magnetic circuit 20 Damper 21 Voice coil 22 Bobbin 23 Frame
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