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JP2009124441

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2009124441
PROBLEM TO BE SOLVED: To provide a speaker device with relatively high sound quality and to
provide a relatively small speaker device. A speaker device (1) is disposed between a casing (31),
a magnetic circuit (10) disposed facing the casing (31), and between the casing (31) and the
magnetic circuit (10). And a support member 35 provided between the housing 31 and the
magnetic circuit 10 so as to pass through the inside of the vibrator 20 and supporting the
magnetic circuit 10, and at least the vibrator 20. And the terminal portion 27 disposed in the
space surrounded by the housing 31, the vibrating body 20 has the voice coil 22, and the
terminal portion 27 is from the voice coil 22 fixed to the vibrating body 20. The drawn
conductive wire 26 (lead wire) is electrically connected. [Selected figure] Figure 1
Speaker device
[0001]
The present invention relates to a speaker device.
[0002]
For example, in the opening formed in the upper part of the cabinet, the speaker is disposed so
that the central portion of the cone paper bulges outward, and the substantially flat reflector is
positioned opposite to the cone ridge. An omnidirectional (non-directional) speaker as described
above is known (see, for example, Patent Document 1).
03-05-2019
1
Further, in a specific example of the nondirectional speaker described in Patent Document 1, a
magnetic circuit is disposed at a position facing the cone raised portion, and the magnetic circuit
functions as the reflector.
[0003]
The speaker is a support (frame) formed so as to surround the diaphragm, and more specifically,
a frame extending upward from the outer peripheral upper end of the cabinet and bent toward
the center in the radial direction; Supports reflectors and magnetic circuits disposed at
corresponding positions.
[0004]
Japanese Utility Model Application Publication No. 50-146535
[0005]
However, in the above-mentioned speaker, a frame is provided so as to surround the diaphragm,
and when the speaker is driven, unnecessary vibration such as vibration of the frame itself may
occur to degrade acoustic characteristics.
In addition, since the reproduced sound emitted from the diaphragm is reflected to the frame, the
acoustic characteristics may be degraded.
[0006]
Further, in the speaker having the above configuration, for example, when the terminal portion to
which the conductive wire (lead wire) drawn from the voice coil is connected is provided in the
reflector or the magnetic circuit outside the diaphragm, the speaker is driven The conductive line
connected to the part or the external connection line may vibrate and interfere with the
reproduced sound to deteriorate the acoustic characteristics.
In addition, the conductive wire connected to the terminal portion or the external connection
wire may come in contact with the frame to generate an unnecessary sound.
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[0007]
Moreover, in the above-mentioned speaker, it is necessary to form a frame surrounding the
diaphragm, and the speaker becomes relatively large. Also, if the terminal portion is simply
provided on the outer peripheral portion of the frame, the magnetic circuit, etc., it is difficult to
miniaturize the speaker. Moreover, when the said terminal part is provided, there exists a
possibility that the aesthetics of a speaker may be impaired.
[0008]
The present invention takes an example of the problem to address such a problem. That is, to
provide a speaker device with relatively high sound quality, to provide a relatively small speaker
device, to provide a relatively small high-quality omnidirectional (nondirectional) speaker device,
etc. It is an object of the invention.
[0009]
In order to achieve such an object, the present invention at least comprises the configurations
according to the following independent claims. A speaker device according to the present
invention includes a housing, a magnetic circuit disposed facing the housing, a vibrating body
disposed between the housing and the magnetic circuit, and the inside of the vibrating body. A
supporting member provided between the housing and the magnetic circuit and supporting the
magnetic circuit, and a terminal portion disposed in a space surrounded by at least the vibrating
body and the housing; The vibrator includes a voice coil, and the terminal portion is electrically
connected to a conductive wire drawn from the voice coil.
[0010]
A speaker device according to an embodiment of the present invention includes a housing, a
magnetic circuit disposed to face the housing, a vibrator disposed between the housing and the
magnetic circuit, and the vibrator. A support member provided between the housing and the
magnetic circuit and supporting the magnetic circuit, passing through the inside of the housing,
and a terminal portion disposed in a space surrounded by at least the vibrator and the housing
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The vibrator includes a voice coil, and the terminal portion is electrically connected to a
conductive wire drawn from the voice coil. Preferably, the terminal portion is provided on the
support member. In addition, preferably, the housing has a through hole penetrating the inside
and the outside of the speaker, and through the through hole, the terminal portion and an
external device (for example, an audio processing device) are electrically connected by a
conductive wire. It is characterized by being.
[0011]
In the speaker device having the above configuration, the support member is provided between
the housing and the magnetic circuit so as to pass through the inside of the vibrating body, and
the terminal portion is disposed in the space surrounded by the vibrating body and the housing
Since the terminal portion is electrically connected to the conductive wire drawn from the voice
coil fixed to the vibrating body, for example, the terminal portion is generally provided outside
the magnetic circuit, the housing, etc. Compared with the conventional speaker, generation of
unnecessary sound due to the terminal portion and the conductive wire can be reduced, and
reproduction sound with relatively high sound quality can be provided. Further, the speaker
device according to one embodiment of the present invention provides a relatively compact
nondirectional speaker device because the above-described terminal portion is disposed in the
space surrounded by the vibrator and the housing. be able to. In addition, preferably, since the
terminal device is provided on the support member, the speaker device can provide a relatively
compact nondirectional speaker device with a simple configuration. Further, in detail, in the
speaker device according to the embodiment of the present invention, since the terminal portion
is disposed in the space surrounded by the vibrator and the housing, the terminal portion does
not interfere with the reproduced sound. It is possible to provide reproduced sound with
relatively good acoustic characteristics.
[0012]
Hereinafter, a speaker device according to an embodiment of the present invention will be
described with reference to the drawings.
[0013]
First Embodiment FIG. 1 is a cross-sectional view of a speaker device 1 according to a first
embodiment of the present invention.
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FIG. 2 is a cross-sectional view of a speaker device 1 according to a modification of the first
embodiment of the present invention. As shown in FIGS. 1 and 2, the speaker device 1 according
to the first embodiment of the present invention includes a magnetic circuit 10, a vibrating body
20, a terminal portion 27, a housing 31, a support member 35, and an equalizer 40. The
magnetic circuit 10 corresponds to an embodiment of a magnetic circuit according to the present
invention, and the vibrating body 20 corresponds to an embodiment of a vibrating body
according to the present invention. The terminal portion 27 corresponds to an embodiment of a
terminal portion according to the present invention, and the housing 31 corresponds to an
embodiment of a housing according to the present invention. The support member 35
corresponds to an embodiment of the support member according to the present invention.
[0014]
In the speaker device 1 according to the present embodiment, for example, the magnetic circuit
10, the vibrating body 20, the housing 31, the support member 35, the equalizer 40, etc. It has
symmetry (isotropic), and has omnidirectional (nondirectional) acoustic characteristics in a
direction orthogonal to the longitudinal direction (direction along the central axis) of the support
member 35. That is, the speaker device according to the present invention is applied to the
horizontal nondirectional speaker device. Each component will be described in detail below.
[0015]
The housing 31 is formed in a concave shape, for example, as shown in FIG. 1, and functions as a
base of the speaker device 1. The housing 31 has a recess 31 a formed on the bottom outer side,
and a through hole 31 d formed in a substantially central portion of the recess 31 a. Moreover,
the housing 31 has a recess 31 c formed on the back side. In detail, the recess 31 c is formed on
the side opposite to the side on which the support member 35 is provided. For example, a
network element 8 is provided in the recess 31c. The network element 8 is, for example, an
electronic component or an electrical component such as a capacitor, a coil, a transistor, an
integrated circuit (IC), a switch, or a light emitting element.
[0016]
The support member 35 supports the magnetic circuit 10. Specifically, the support member 35 is
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disposed between the housing 31 and the magnetic circuit 10 so as to pass through the inside of
the vibrating body 20, and supports the housing 31 and the magnetic circuit 10 so as to face
each other. The support member 35 has a first support member 35a and a second support
member 35b, as shown in FIG. 1, for example. The first support member 35a corresponds to an
embodiment of a pillar-shaped support member according to the present invention, and the
second support member 35b corresponds to an embodiment of a cylindrical support member
according to the present invention.
[0017]
The first support member 35a is inserted into the through hole 31d. In addition, the first support
member 35a is inserted into the cylindrical second support member 35b. Also, for example, one
end of the first support member 35 a is coupled to the magnetic circuit 10, and the other end is
coupled to the housing 31. In detail, a bolt etc. are employable as the 1st support member 35a,
for example, and the top of the bolt is stored in crevice 31c. For example, the first support
member 35 a and the magnetic circuit 10 are formed by screwing the screwing portion formed
at the tip of the bolt to the screwed portion formed at the inner peripheral portion of the yoke 11
of the magnetic circuit 10. Is joined. The first support member 35a is made of, for example, a
known material such as metal or resin. The first support member 35 a is not limited to, for
example, the above embodiment, and for example, the tip of a bolt may be coupled to the housing
31 and the top may be coupled to the magnetic circuit 10. The second support member 35 b is
formed in a tubular shape, and the first support member 35 a is inserted therein. Further, one
end of the second support member 35 b is joined to the magnetic circuit 10, and the other end is
joined to the housing 31. The second support member 35 b is made of, for example, a known
material such as resin or metal. Further, a terminal portion 27 described later is attached to the
second support member 35 b, and the second support member 35 b is made of a non-conductive
material such as resin so as not to be electrically connected to the terminal portion 27.
Preferably, it is formed.
[0018]
Further, it is preferable that the support member 35 and the members constituting the housing
31 or the magnetic circuit 10 be formed of different members, in particular, different metal
materials. By forming in this manner, for example, the terminal portion 27 provided on the
support member 35, the conductive wire 26, the conductive wire 7 and the like are prevented
from being resonated by vibration propagating from the housing 31 through the support
member 35. be able to.
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[0019]
As shown in FIG. 1, in the housing 31, a plurality of relatively small through holes 31 b are
formed along the circumferential direction in the range in which the recess 31 c is formed. The
through hole 31 b functions as, for example, a passage through which a conductive wire
(external connection wire) 7 electrically connected to the terminal portion 27 passes. For
example, the conductive wire 7 may be directly electrically connected to the external device 9, or
may be connected to the external device 9 via the network element 8 and the conductive wire 81
as shown in FIG. . Moreover, although the network element 8 which concerns on this
embodiment is provided in the recessed part 31c, it is not restricted to this form, For example,
you may be provided in the housing | casing.
[0020]
Further, as shown in FIGS. 1 and 2, the through hole 31 b is formed in the interior of the speaker
device 1, more specifically, in the internal space of the speaker device 1 formed by the vibrating
body 20 and the housing 31 Function as a vent that suppresses the temperature rise inside the
vibrator and the inside of the magnetic circuit by exchanging air between them. The through
holes 31 b also have a function of adjusting the air pressure inside the vibrating body 20.
Further, for example, in the case of a busless type speaker device in which the housing 31
functions as a cabinet, the low-pass resonance frequency can be relatively reduced by forming
the through holes 31 b in the housing 31. The through holes 31 b are not limited to the above
embodiment, and for example, the through holes 31 b may be formed from the side surface of
the housing 31 along the radial direction toward the center.
[0021]
Vibrator 20 The vibrator 20 has a voice coil bobbin 21, a voice coil 22, a diaphragm 23, an edge
24, and a damper 25. The voice coil bobbin 21 is formed in a tubular shape. Further, the voice
coil bobbin 21 is provided with a voice coil 22 at an upper end portion (end portion on the
magnetic circuit side). The voice coil bobbin 21 according to the present embodiment extends
from the inner peripheral portion of a diaphragm 23 described later to the magnetic circuit 10
and is disposed between the diaphragm 23 and the magnetic circuit 10. By arranging the voice
coil bobbin 21 between the diaphragm 23 and the magnetic circuit 10, the length of the voice
03-05-2019
7
coil bobbin 21 can be made relatively small, and the weight of the vibrating body 20 can be
reduced. Further, by making the length of the voice coil bobbin 21 relatively small, the vibration
of the voice coil 22 can be easily transmitted by the diaphragm 23, and in particular, it is
possible to expand the high frequency reproduction band. Further, by arranging the voice coil
bobbin 21 between the terminal portion 27 and the magnetic circuit 10 described later, even if
the voice coil bobbin 21 vibrates due to the vibration of the voice coil 22, contact with the
terminal portion 27; By contacting the portion 27, it is possible to suppress the generation of
abnormal noise. The voice coil 22 is formed in a tubular shape, and is wound around the voice
coil bobbin 21. The conductive wire (lead wire) 26 drawn from the voice coil 22 is electrically
connected to the terminal portion 27. For example, a short voice coil or a long voice coil can be
adopted as the voice coil 22. The voice coil 22 according to the present embodiment employs a
short voice coil. By adopting the short voice coil 22, the weight of the vibrating body 20 can be
reduced, and the short voice coil 22 can be prevented from contacting a part of the magnetic
circuit. The diaphragm 23 is formed in a conical shape, and is disposed so as to cover the
housing 31. In detail, the diaphragm 23 is formed in a cone shape in which the diameter of the
end on the housing 31 side is larger than the diameter of the end on the magnetic circuit 10 side.
The diaphragm 23 has an outer peripheral portion (outer peripheral end) fixed to the outer
peripheral portion of the housing 31 in a freely vibrating manner via the edge 24, and the inner
peripheral portion is connected to the outer peripheral portion of the voice coil bobbin 21 by an
adhesive or the like. It is done. The inner peripheral portion of the edge 24 is fixed to the outer
peripheral portion of the diaphragm 23, and the outer peripheral portion (the outer peripheral
end) is fixed to the housing 31. For example, the diaphragm 23 and the edge 24 may be
integrally formed or may be separate members.
The inner peripheral portion of the damper 25 is connected to the outer peripheral portion of the
voice coil bobbin 21, and the outer peripheral portion is connected to a member constituting the
magnetic circuit 10. In detail, the damper 25 is connected to the damper support member 14
disposed on the lower surface side of the magnetic circuit 10.
[0022]
Magnetic Circuit 10 The magnetic circuit 10 includes a yoke 11, a magnet 12, a plate 13, and a
damper support member 14. As the magnetic circuit 10, for example, an outer magnet type
magnetic circuit, an inner magnet type magnetic circuit or the like may be employed. An external
magnet type magnetic circuit is adopted as the magnetic circuit 10 according to the present
embodiment. The magnetic circuit 10 is provided on the upper portion of the support member
35, specifically, on the end opposite to the housing 31. The magnetic circuit 10 according to the
present embodiment is provided in the recess of the equalizer 40. Specifically, the magnetic
03-05-2019
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circuit 10 is surrounded by the equalizer 40.
[0023]
The yoke 11 includes a substantially cylindrical main body portion 11a, and a flange portion 11b
extending in the outer peripheral direction from the upper end of the main body portion 11a.
The yoke 11 is supported by a support member 35. Specifically, the first support member 35 a is
inserted into a hole formed at the center of the yoke 11 in a state where the yoke 11 is disposed
on the second support member 35 b. The yoke 11 is formed of, for example, a known material
such as a metal. The magnet 12 is formed in a ring shape, and is disposed on the lower surface of
the flange 11 b of the yoke 11. The magnet 12 is formed of, for example, a permanent magnet
such as samarium-cobalt-based, alnico-based, rare earth-based, or ferrite-based magnet. The plate
13 is formed in a ring shape, and is disposed on the lower surface of the magnet 12. The plate 13
is formed of, for example, a known material such as a metal. In the magnetic circuit 10
configured as described above, a magnetic gap is formed between the outer peripheral wall of
the substantially cylindrical main body portion 11 a of the yoke 11 and the inner peripheral wall
of the plate 13. The damper support member 14 is formed in a ring shape and provided on the
lower surface of the plate 13. The damper support member 14 is formed of, for example, a
known material such as a resin.
[0024]
The terminal portion 27 is formed of, for example, a metal such as iron, and the conductive wire
26 drawn from the voice coil 22 fixed to the vibrating body 20 is electrically connected. For
example, as shown in FIGS. 1 and 2, the terminal portion 27 is provided at a substantially
intermediate position of the second support member 35 b. The terminal portion 27 has one end
fixed to the second support member 35b, and the other end formed so as to extend radially
outward by a predetermined distance. Further, the terminal portion 27 according to the present
embodiment is formed in, for example, an L-shape, and a groove-shaped fitting in which a portion
along the longitudinal direction of the support member 35 is formed in the second support
member 35b. It is fixed by an adhesive agent etc. in the state fitted in the part. Further, the
terminal portion 27 and the second support member 35 may be integrally molded by, for
example, an injection molding manufacturing method. In addition, in the terminal portion 27, for
example, the conductive wire 7 may be electrically connected to the external device 9 through
the through hole 31 b or may be connected to the network element 8.
03-05-2019
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[0025]
For example, as shown in FIGS. 1 and 2, the equalizer 40 is formed in a shape surrounding the
magnetic circuit 10, and the outer peripheral shape is formed in a substantially cylindrical shape,
and the end portion on the housing 31 side is an inclined surface portion Is formed. In the
equalizer 40 according to the present embodiment, the sloped surface portion formed at the end
on the housing 31 side is curved. By making the inclined surface portion curved, it is possible to
make the output sound pressure frequency characteristic flat from the low tone range to the high
tone range. Further, by making the outer diameter of the equalizer 40 smaller than the inner
diameter of the housing 31, the output sound pressure frequency characteristic can be made flat
from the low tone range to the high tone range.
[0026]
In the speaker device 1 of the above configuration, for example, an audio signal from the external
device 9 such as an audio reproduction device, an amplifier circuit, a radio, a television broadcast
reception device, a tuner, a car navigation system, an audio processing device The signal is input
to the terminal portion 27 through the element 8 and the conductive wire 7. At this time, an
audio signal may be input from the external device 9 to the terminal unit 27 through the
conductive wire 7. Then, an audio signal is input to the voice coil 22 from the terminal 27 via the
conductive wire 26. The voice coil 22 generates a driving force (Lorentz force) according to the
magnetic field of the magnetic gap of the magnetic circuit 10 and the level of the audio signal,
and the vibrating body 20 such as the voice coil bobbin 21 and the diaphragm 23 is generated
by the driving force. And vibrate in the vertical direction (direction along the longitudinal
direction of the support member 35). A part of the sound wave (reproduced sound) emitted from
the diaphragm 23 is reflected by the equalizer 40 and emitted as a sound wave of a
predetermined acoustic characteristic in a predetermined direction. The speaker device 1 having
the above configuration is formed concentrically with the vibrating body 20, the equalizer 40,
etc., and the reproduction sound reflected and emitted by the equalizer 40 is orthogonal to the
longitudinal direction of the support member 35. Have omnidirectional (nondirectional) acoustic
characteristics.
[0027]
FIG. 3 is a diagram for explaining the acoustic characteristics of the speaker device. Specifically,
FIG. 3A is a diagram for explaining the acoustic characteristics of the speaker device according to
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an embodiment of the present invention, and FIG. 3B is a general diagram having a dome-shaped
diaphragm of a comparative example. It is a figure for demonstrating the acoustic characteristic
of a speaker apparatus, FIG.3 (C) is a figure for demonstrating the measurement angle of acoustic
characteristic. In FIGS. 3A and 3B, the vertical axis represents SPL (Sound Pressure Level: unit dB
(decibel)), and the horizontal axis represents frequency (unit Hz).
[0028]
Next, measurement results of acoustic characteristics of reproduced sound of the speaker device
1 according to an embodiment of the present invention and a general speaker device
(specifically, a dome-shaped speaker device) will be described. As shown in FIG. 3C, the acoustic
characteristics of the reproduced sound were measured in the directions of 0 °, 30 °, 60 °,
and 90 ° with reference to the upper side of the speaker device (longitudinal direction of the
support member). As shown in FIG. 3B, in the general dome-shaped speaker, the variation in
acoustic characteristics at each angle is relatively large. In detail, a general dome-shaped speaker
has a directional acoustic characteristic that the sound pressure level in the high range is smaller
than that in the central axis direction in the direction (horizontal direction) orthogonal to the
central axis . On the other hand, as shown to FIG. 3 (A), in the speaker apparatus 1 which
concerns on one Embodiment of this invention, the dispersion | variation in the acoustic
characteristic of the reproduction | regeneration sound of each said angle is comparatively small.
Further, in the speaker device 1, reproduced sound with a relatively large sound pressure level
was obtained at each frequency. That is, the speaker device 1 according to the present invention
has an omnidirectional (nondirectional) acoustic characteristic in a direction orthogonal to the
longitudinal direction of the support member 35, and an angle of 0 ° to the longitudinal
direction of the support member 35 The acoustic characteristics in the 90 ° direction are also
substantially uniform. For this reason, when the reproduction sound is emitted from the speaker
unit 1, the sound becomes clear to the listener.
[0029]
As described above, the speaker device 1 according to the present embodiment is disposed
between the housing 31, the magnetic circuit 10 disposed facing the housing 31, and the
housing 31 and the magnetic circuit 10. In addition, a support is provided between the housing
31 and the magnetic circuit 10 so as to pass through the inside of the vibration body 20 and the
vibration body 20 whose outer peripheral portion is vibratably supported by the housing 31 and
supports the magnetic circuit 10. A member 35 and a terminal portion 27 disposed in a space
surrounded by at least the vibrating body 20 and the housing 31. The terminal portion 27 is
electrically conductive drawn from the voice coil 22 fixed to the vibrating body 20. The wire 26
(lead wire) is electrically connected, and the conductive wire 7 is connected to the external device
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9 through the through hole 31b formed in the housing 31 from the terminal portion 27. A
terminal provided on the outside of Compared with speaker device, it is possible to reduce the
emission of unwanted sounds by the terminal unit 27 and the conductive wire 26, it is possible to
provide a relatively high sound quality of the reproduced sound.
[0030]
Further, in the speaker device 1, since the terminal portion 27 is disposed in the space
surrounded by the vibrating body 20 and the casing, specifically, approximately at the middle
position of the support member 35, the terminal portion is provided, for example A relatively
compact, high-quality non-directional speaker device can be provided as compared to a general
speaker device.
[0031]
Moreover, since the conductive wire 26 drawn from the voice coil is not exposed to the outside
of the diaphragm, the speaker device 1 has good symmetry in appearance.
[0032]
Moreover, since the network device 8 is provided in the recess 31 c of the housing 31 in the
speaker device 1 according to the present embodiment, compared to, for example, a general
speaker device in which the network device 8 is provided on the outer side, A relatively small
speaker device can be provided.
In addition, since the speaker device 1 is provided with the network element 8 in the recess 31 c
of the housing 31, the speaker device 1 is simpler than, for example, the network element 8
provided on the inner peripheral surface side of the recess 31 a of the housing 31. Can be wired
to the external device 9.
[0033]
Further, in the speaker device 1 according to the present embodiment, since an open space is
formed on the acoustic radiation side of the diaphragm 23, a general speaker in which a frame or
the like is formed on the acoustic radiation side of the diaphragm 23 Compared with the device,
high-quality reproduced sound can be provided without problems such as reflection of
reproduced sound by the frame and deterioration of sound quality due to unnecessary vibration
of the frame.
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[0034]
Further, the speaker device 1 according to the present embodiment can reduce the weight of the
vibrating body 20 by adopting the short voice coil 22, and reduce the contact of the short voice
coil 22 with a part of the magnetic circuit. can do.
[0035]
Further, it is preferable that the support member 35 and the members constituting the housing
31 or the magnetic circuit 10 be formed of different members, in particular, different metal
materials.
By doing this, for example, it is possible to suppress resonance due to vibration transmitted from
the casing 31 to the terminal portion 27, the conductive wire 26, the conductive wire 7 and the
like provided on the support member 35. .
[0036]
Second Embodiment FIG. 4 is a cross-sectional view of a speaker device 1a according to a second
embodiment of the present invention.
The differences from the first embodiment will be described.
As shown in FIG. 4, the speaker device 1 a according to the present embodiment includes a metal
member 58, a metal member 59, and a metal member 60.
The metal member 58 is provided on the inner circumferential portion of the magnet 12 facing
the outer circumferential portion of the yoke 11. The metal member 59 is provided on the outer
peripheral portion of the yoke 11 facing the inner peripheral portion of the plate 13. The metal
member 60 is provided on the inner peripheral portion of the plate 13. As these metal members
58 to 60, for example, known metal materials such as copper and iron can be adopted. The metal
members 58 to 60 can suppress, for example, an increase in the inductance (also referred to as
03-05-2019
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an induction coefficient) of the short voice coil 22, and can improve the sensitivity of the speaker
unit 1a.
[0037]
As described above, since the speaker device 1a according to the present embodiment includes
the metal members 58 to 60, an increase in the inductance (also referred to as an induction
coefficient) of the short voice coil 22 can be suppressed. The sensitivity can be improved. In
particular, reproduced sound with relatively good acoustic characteristics can be provided in the
high tone range.
[0038]
Moreover, although the speaker apparatus 1a which concerns on embodiment mentioned above
had the metal members 58-60, it is not restricted to this embodiment, For example, the metal
member 58, the metal member 59, and the metal member 60 It may have either, or a
combination thereof.
[0039]
Third Embodiment FIG. 5 is a cross-sectional view of a speaker device 1b according to a third
embodiment of the present invention.
The differences between the first and second embodiments will be described. As shown in FIG. 5,
the speaker device 1 b according to the present embodiment has a plate 17. The plate 17 is
formed in a ring shape extending from the yoke 11 to the inside of the diaphragm 23.
Specifically, the speaker device 1 b has a plate 13 attached to the lower surface of the magnet 12
and a ring-shaped plate 17 surrounding the second support member 35 b below the yoke 11. In
the speaker device 1b configured as described above, the magnetic flux density distribution in
the magnetic gap of the magnetic circuit 10 becomes substantially uniform, and distortion of the
reproduced sound due to nonuniformity of the magnetic flux density distribution can be reduced.
It is possible to provide reproduced sound with various acoustic characteristics.
[0040]
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Fourth Embodiment FIG. 6A is a cross-sectional view of a speaker device 1c according to a fourth
embodiment of the present invention, and FIG. 6B relates to a modification of the fourth
embodiment of the present invention. It is a sectional view of speaker device 1d. The differences
from the first to third embodiments will be described. The speaker device according to the first
and second embodiments has the external magnet type magnetic circuit 10. However, as shown
in FIG. 6A, the speaker device 1c according to the present embodiment is an internal magnetic
type magnetic device. It has a circuit 10c. The magnetic circuit 10c has a flat plate-shaped yoke
11c, a ring-shaped magnet 12c disposed on the lower surface side of the yoke 11c, and a ringshaped plate 13c disposed on the lower surface side of the magnet 12c. The support member 35
a is coupled to the yoke 11 c and supports the equalizer 40.
[0041]
Further, as shown in FIG. 6 (B), the speaker device 1d has an internal magnet type magnetic
circuit 10c. The magnetic circuit 10c has a yoke 11d, a ring-shaped magnet 12d disposed on the
lower surface side of the yoke 11d, and a ring-shaped plate 13d provided on the lower surface
side. In detail, the yoke 11 d is formed in a shape in which the outer peripheral portion extends
toward the housing 31. The support member 35 a is coupled to the yoke 11 d and supports the
equalizer 40.
[0042]
Since the speaker devices 1c and 1d having the above configuration have the internal magnet
type magnetic circuit 10, the speaker device according to the present invention can be realized
with a simple configuration as compared to, for example, a speaker device having an external
magnet type magnetic circuit. be able to. In addition, since the speaker device has a relatively
simple configuration, the speaker device can be further miniaturized.
[0043]
Fifth Embodiment FIG. 7 is a cross-sectional view of a speaker device 1e according to a fifth
embodiment of the present invention. Differences from the speaker devices according to the first
to fourth embodiments will be described. As shown in FIG. 7, the speaker device 1 e according to
the present embodiment has an internal magnet type magnetic circuit 10 e. The magnetic circuit
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10e has a yoke 11e, a ring-shaped magnet 12e, and a ring-shaped plate 13d provided on the
lower surface side of the magnet 12e. In detail, the yoke 11e is formed in a shape in which an
end portion thereof extends toward the housing 31 and is then bent radially inward toward the
plate 13e as compared with the yoke 11c according to the third embodiment. .
[0044]
Since the speaker device 1e having the above configuration includes the internal magnetic type
magnetic circuit 10e including the yoke 11e having the above configuration, for example, the
magnetic flux density of the magnetic gap of the magnetic circuit 10e is compared with the
speaker device 1c according to the third embodiment Large. For this reason, the speaker device
1e can provide reproduction sound with relatively large sound pressure.
[0045]
Sixth Embodiment FIG. 8 is a cross-sectional view of a speaker device 1f according to a sixth
embodiment of the present invention. The differences between the first and second embodiments
will be described. The speaker device 1f according to the present embodiment includes an
internal magnet type magnetic circuit 10f. Specifically, as shown in FIG. 8, the magnetic circuit
10f includes a yoke 11f, a flat magnet 12f, and a flat plate 13f disposed on the lower surface side
of the magnet 12f. In detail, the yoke 11 f is formed in a shape in which an end portion extends
toward the housing 31 as compared with the yoke 11 c according to the third embodiment.
[0046]
The speaker device 1f configured as described above includes the internal magnetic magnetic
circuit 10f including the yoke 11f configured as described above, so that the yoke 11f has a
simpler configuration than, for example, the speaker device 1e according to the fifth
embodiment. Therefore, the speaker device 1f according to the present invention can be realized
with a simple configuration.
[0047]
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Seventh Embodiment FIG. 9A is a cross-sectional view of a speaker device 1g according to a
seventh embodiment of the present invention, and FIG. 9B relates to a modification of the
seventh embodiment of the present invention. It is a sectional view of speaker device 1h. The
differences from the first to sixth embodiments will be described. In the speaker device of each
embodiment, a protective net, a protective guard, a protective member, or the like may be
provided to surround the diaphragm 23 to protect the diaphragm 23.
[0048]
In detail, for example, as shown in FIG. 9A, the speaker device 1g according to the seventh
embodiment includes a protection net 51. The protective net 51 is provided so as to cover the
space between the equalizer 40 and the housing 31. Since the protective net 51 and the
cylindrical protective guard are uniformly formed in the circumferential direction, even if the
protective net and the cylindrical protective guard are disposed around the diaphragm, the
acoustic characteristics are adversely affected. Can be deterred.
[0049]
Further, as shown in FIG. 9B, the speaker device 1 h has a protective member 52. The protection
member 52 is, for example, a rod-like member, and a plurality of protection members 52 are
provided at equal intervals in the circumferential direction. By providing the protection member
52 having the shape shown in FIG. 9B in the speaker device 1 h configured as described above, it
is possible to suppress the occurrence of an adverse effect on the acoustic characteristics due to
the occurrence of resonance or the like in the protection member 52. For example, in the case of
a speaker device in which the protective member is formed in a shape extending from the
housing 31 to the magnetic circuit 10 and supported by both the housing 31 and the magnetic
circuit 10 or the equalizer 40, There are such problems. When the voice coil 22 vibrates, for
example, when the voice coil 22 vibrates in the acoustic radiation direction, the magnetic circuit
10 receives magnetic repulsion and vibrates in the opposite direction to the acoustic radiation
direction. This vibration is transmitted to the protection member 52 to generate resonance or the
like, and the protection member 52 generates a sound wave. Further, when the voice coil 22
vibrates, the damper 25 vibrates following the vibration of the diaphragm 23, so the vibration of
the damper 25 is transmitted to the protective member 52 to generate resonance etc. and the
protective member 52 generates a sound wave. Do. Further, when the voice coil 22 vibrates, the
diaphragm 23 vibrates, so that the air pressure acts on the housing 31 from the back surface
(surface opposite to the sound radiation direction) of the diaphragm 23 toward the housing 31. ,
The housing 31 vibrates. For this reason, the vibration of the housing 31 is transmitted to the
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protection member 52 to generate resonance or the like, and the protection member 52
generates a sound wave. On the other hand, the protection member 52 according to the present
embodiment is formed in a shape as shown in FIG. 9B, specifically, in a cone shape in which the
lower end is not joined to the housing 31. Can suppress the generation of an acoustic wave at
resonance or the like to adversely affect the acoustic characteristics. FIG. 10 is a diagram
showing experimental results of the above speaker device. In detail, it is a figure which shows the
acoustic characteristic of the case where the protection member 52 is provided, and the case
where it is not provided. The horizontal axis represents frequency (kHz) and the vertical axis
represents sound pressure (dB). As shown in FIG. 10, the acoustic characteristics are hardly
affected by the case where the protective member 52 having the shape as shown in FIG. 9B is
provided and the case where it is not provided. Further, the lower end portion of the protection
member may be joined to the housing, and the upper end portion may be an open end portion.
[0050]
The present invention is not limited to the embodiments described above. The present invention
may be implemented in various forms, and may be implemented in combination with the abovedescribed embodiments. Moreover, in the embodiment mentioned above, although the terminal
part 27 was formed in the L-shape, it is not restricted to this form, You may form in various
shapes. In the embodiment described above, the omnidirectional (nondirectional) speaker device,
in particular, the sound pressure levels in the horizontal direction (direction perpendicular to the
vibration direction of the voice coil) are substantially equal, and the sound pressure levels in the
horizontal direction Although the speaker unit in which a large difference is not seen between
the sound pressure level in the vibration direction of the voice coil and the voice coil is described,
the present invention is not limited to this embodiment, and directivity may be provided in a
specific direction. Further, in the embodiment described above, the diaphragm 23 is formed in a
circular shape, but is not limited to this form, and may be formed in various shapes such as a
quadrangular pyramid shape, a polygonal pyramid shape, etc. .
[0051]
As described above, the speaker device 1 according to the present invention is disposed between
the housing 31, the magnetic circuit 10 disposed facing the housing 31, and the housing 31 and
the magnetic circuit 10. A supporting member provided between the housing 31 and the
magnetic circuit 10 so as to pass through the inside of the vibrating body 20 and the vibrating
body 20 whose outer peripheral portion is vibratably supported by the housing 31 and
supporting the magnetic circuit 10 35 and a terminal 27 disposed in a space surrounded by at
least the vibrating body 20 and the housing 31. The terminal 27 is a conductive wire drawn from
the voice coil 22 fixed to the vibrating body 20. 26 (lead wire) is electrically connected, and the
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conductive wire 7 is connected to the external device 9 through the through hole 31b formed in
the housing 31 from the terminal 27. For example, a magnetic circuit, a housing, etc. General
terminal with a terminal on the outside of the Compared with mosquito device, it is possible to
reduce the emission of unwanted sounds by the terminal unit 27 and the conductive wire 26, it is
possible to provide a relatively high sound quality of the reproduced sound.
[0052]
Moreover, since the terminal part 27 is arrange | positioned inside the vibrating body 20, the
speaker apparatus 1 has good symmetry of an external appearance.
It looks good. Moreover, since the terminal part 27 is formed inside the vibrating body 20, the
speaker apparatus 1 can provide the speaker apparatus 1 of comparatively small size. In the
speaker device 1, the support member 35 passing through the inside of the vibrating body 20 is
provided with the terminal portion 27, and the conductive wire 26 (including the lead wire and
the tinsel wire) drawn from the voice coil 22 is provided in the terminal portion 27. Being
connected, it is possible to provide relatively high quality reproduced sound.
[0053]
FIG. 1 is a cross-sectional view of a speaker device 1 according to a first embodiment of the
present invention. It is sectional drawing of the speaker apparatus 1 which concerns on the
modification of 1st Embodiment of this invention. It is a figure for demonstrating the acoustic
characteristic of a speaker apparatus, and (A) is a figure for demonstrating the acoustic
characteristic of the speaker apparatus based on one Embodiment of this invention in detail, (B)
is a comparative example It is a figure for demonstrating the acoustic characteristic of the
general speaker apparatus provided with a dome-shaped diaphragm, (C) is a figure for
demonstrating the measurement angle of acoustic characteristic. It is sectional drawing of the
speaker apparatus 1a which concerns on 2nd Embodiment of this invention. It is sectional
drawing of the speaker apparatus 1b which concerns on 3rd Embodiment of this invention. (A) is
a cross-sectional view of a speaker device 1c according to a fourth embodiment of the present
invention, and (B) is a cross-sectional view of a speaker device 1d according to a modification of
the fourth embodiment of the present invention. It is sectional drawing of the speaker apparatus
1e which concerns on 5th Embodiment of this invention. It is sectional drawing of the speaker
apparatus 1f which concerns on 6th Embodiment of this invention. (A) is a cross-sectional view of
a speaker device 1g according to a seventh embodiment of the present invention, and (B) is a
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cross-sectional view of a speaker device 1h according to a modification of the seventh
embodiment of the present invention. It is a figure for demonstrating the acoustic characteristic
of the speaker apparatus 1h shown to FIG. 9 (B).
Explanation of sign
[0054]
Reference Signs List 1 speaker device 7 conductive wire 8 network device 9 external device 10
magnetic circuit 11 yoke 12 magnet 13 plate 14 damper support member 20 vibrator 21 voice
coil bobbin 22 voice coil 23 diaphragm 24 edge 25 damper 26 conductive wire (lead wire) 27
terminal Part 31 case 31 c recessed part 31 d through hole (extraction passage) 35 support
member 35 a first support member 35 b second support member 40 equalizer 51 protection net
52 protection member 58-60 metal member 81 conductive wire
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