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JPWO2013011699

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DESCRIPTION JPWO2013011699
Abstract Provided is a self-resonant sounding type speaker that is waterproof and has good
attachment. The self-resonant sounding type speaker 1 includes an actuator type speaker unit 2
and a polymer foam 3 covering the entire outer surface of the speaker unit 2 and generates
vibration from the speaker unit 2 to the outside as a plane wave. . The polymer foam 3 has a
foaming ratio of 10 to 30 times, and preferably has a closed cell structure. Moreover, 2 mm or
more is preferable and, as for the range of the thickness of the polymeric foam 3, 3 mm or more
is more preferable. [Selected figure] Figure 1
Self-resonant pronunciation speaker and installation method of self-resonance speaker
[0001]
TECHNICAL FIELD The present invention relates to a self-resonant sounding type speaker having
a structure in which a speaker is covered and a sound generation vibration by the speaker unit is
received and amplified to emit a loud sound.
[0002]
As the inventions shown in Patent Documents 1 to 3 have been proposed, a speaker that can be
suitably used for a thin audio image display such as a thin television receiver and a speaker
system such as a car stereo, an audio image display having a speaker, It is a speaker system
which has the said speaker.
[0003]
JP 2008-141570 JP JP 2010-153942 JP JP 2010-166515 JP
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[0004]
However, the frame of the speaker unit is exposed to the outside and there is a problem in
waterproofing, the double-sided adhesive tape is used for adhesion of the frame etc. so it is easy
to peel off, etc. there were.
In particular, in the case where the mounting plate is uneven, in the case where the mounting
surface of the structure to be mounted is uneven, it is difficult even with the method using the
double-sided adhesive tape or bolt of the conventional method.
Naturally, I could not amplify the sound.
[0005]
Further, in order to make the conventional speaker waterproof, it is necessary not only to select a
waterproof material as a member constituting the speaker such as a cone or an edge, but also to
take measures for the built-in coil and wiring.
[0006]
The present invention has been made to solve the above-described problems, and includes a
speaker unit and a polymer foam covering the entire outer surface of the speaker unit, and the
sound generation vibration generated from the speaker unit is the polymer foam. It is a selfresonant sounding type speaker that amplifies in the body and emits as a plane wave.
[0007]
The self-resonant sounding type speaker referred to here is a speaker having a mechanism in
which a polymer foam covering a speaker unit receives and amplifies sound generation vibration
by a built-in speaker unit and emits a loud sound.
In the case of a normal speaker, a large resonance box is required, but in this system, it can be
constructed with a relatively free shape, such as a thin plate, a small sphere, or another irregular
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shape.
[0008]
As a method of covering the speaker unit with the polymer foam, natural foaming of the polymer
foam performed so as to contain the speaker unit, filling foam of the polymer foam performed so
as to contain the speaker unit in the mold, Embedding the speaker unit in the polymer foam,
bonding the polymer foam to the speaker unit, and the like can be mentioned.
When a polymer foam is provided by natural foaming, the dimensions can be adjusted by cutting
into a predetermined thickness and shape after foaming.
When the speaker unit is covered with a polymer foam by natural foaming or filling foaming, the
shape of the speaker unit is not deformed and the speaker unit is not damaged by heat. The
foaming temperature is preferably, for example, from normal temperature to about 80 degrees
Celsius.
[0009]
The method for producing a self-resonant sounding type speaker according to the present
invention will be described more specifically, for example, in the case of filling and foaming.
When a hard urethane foam is used as the polymer foam, the speaker unit is temporarily fixed in
the male and female mold at normal temperature, the liquid polymer foam material is completely
mixed within a few seconds, and poured into the mold. The heat is only the heat generation of
the foam material. A high magnification foam can be obtained by letting the pressure which
occurs at the time of foaming not come out without applying pressure naturally. In the case of
other foams, heating or pressurization may be used depending on the foaming method.
[0010]
It is suitable for the present invention that the polymer foam has a closed cell structure.
Moreover, it is preferable that foaming ratio is 10 to 30 times.
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[0011]
Examples of the polymer foam as used herein include hard urethane foam, hard polystyrene
foam, hard polyethylene foam, hard polypropylene foam, hard phenol foam, hard polyimide
foam, hard polyvinyl chloride foam and the like. .
[0012]
Examples of the type of the speaker unit incorporated in the polymer foam include a cone type
speaker, an actuator type speaker, a magnetostrictive element type speaker, a piezoelectric type
speaker, a hybrid speaker and the like.
[0013]
The cone-shaped speaker referred to here generally uses a dynamic speaker unit, has a type of
diaphragm, and has a conical (conical) diaphragm with a diameter considerably larger than the
diameter of the voice coil. It is named.
As a diaphragm, a dome type or a flat type may be used.
[0014]
The term "actuator-type speaker" as used herein refers to a speaker of a type that generates
sound from a mounted object by converting an audio current into vibration and closely bonding
the vibration to the mounted object.
It is also called a vibration speaker or the like, and it does not have a specific diaphragm such as
cone paper, and uses an arbitrary mounted object as a sound generation vibrator.
[0015]
The magnetostrictive element type speaker as referred to herein is a speaker using a single
crystal super magnetostrictive material as a material, and is a speaker that generates asperity
deformation and generates sound by passing an electric current.
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[0016]
Here, the piezoelectric speaker refers to a speaker in which a voltage is applied between two
piezoelectric members and vibration is generated by metal deformation caused by the potential
difference.
[0017]
The hybrid speaker referred to here is a composite speaker in which the sound generation by the
diaphragm and the vibration by the actuator speaker are combined.
[0018]
The thickness of the polymer foam relative to the speaker unit is preferably 2 mm or more, and
more preferably 3 mm or more.
The polymeric foam encases the speaker body and secures a portion that resonates further.
More specifically, it is preferable that the range of the thickness of the said polymer foam is 2-40
mm.
In the case of a small self-resonant sounding type speaker (about 10 to 20 mm in thickness), 2
mm to 10 mm (size on one side) is preferable, and in the case of a medium or large self-resonant
sounding type speaker (20 mm or more in thickness) Although the dimension of one side is
preferable, it can be set without being limited to this in consideration of the type, size, shape,
installation place and the like of the speaker unit.
[0019]
Further, the present invention is a self-resonant sounding type speaker provided with a mounting
plate for transmitting sounding vibration to the outside on the outer side of the polymer foam.
[0020]
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When the mounting plate is in contact with the polymer foam, the vibration from the speaker
unit is transmitted to the mounting plate via the polymer foam, and the mounting plate rings to
act as a sound generator.
Therefore, metals and the like that are generally difficult to vibrate can be used as the material of
the mounting plate. Other than metal, glass, pottery, wood, synthetic resin or the like can also be
used as the mounting plate.
[0021]
Further, the present invention is a self-resonance sounding type speaker which is installed on the
inner surface of a housing provided to an external device or an external structure and uses the
housing as the mounting plate.
[0022]
Further, the present invention is a self-resonant sounding type speaker in which the mounting
plate is provided outside the external device or the external structure, and the polymer foam is
mounted on the back surface of the mounting plate.
[0023]
The external device or external structure referred to herein means a device or a structure
separate from the self-resonant sounding type speaker.
For example, vending machines, car washes, washing machines, various other industrial
machines, public structures wall, pillars, ceilings, floors and other outdoor works, toilets, baths,
dressing rooms, kitchens, ceilings, etc. Examples include indoor structures such as walls,
columns, ceilings, and floors.
[0024]
The housing herein refers to a plate generally provided outside the external device or the
external structure such as a casing body, a decorative plate, a protective plate or the like
provided in the external device or the external structure.
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[0025]
Further, according to the present invention, when the mounting plate is uneven, the speaker unit
is temporarily fixed, and the polymer foam is injected into the gap between the speaker unit and
the mounting plate, and the outside of the speaker unit And a self-resonant sounding type
speaker comprising the polymer foam covered and solidified.
[0026]
Further, according to the present invention, a temporary fixing step of temporarily fixing a
speaker unit inside a housing provided to an external device and securing a fixed gap between
the housing and the speaker unit, and polymer foaming in the gap A self-resonant sounding type
wherein the case is used as a mounting plate for transmitting sounding vibration to the outside
by including an injecting step of injecting a material and a foaming step of filling and foaming the
polymer foam material in the gap. It is an installation method of a speaker.
[0027]
The polymer foam is preferably provided in close contact with the speaker unit so as not to
prevent the vibration of the speaker unit.
For example, in the case where the speaker unit is a cone type speaker, it is desirable that the
cone (diaphragm) vibrates with a certain degree of freedom and properly transmit a voice coil or
the equivalent vibration to the covering portion of the polymer foam.
Further, for example, when the self-resonance sounding type speaker according to the present
invention is mounted on the mounting plate, it is desirable to perform foam attachment directly
to the mounting case in order to drive the speaker most efficiently.
Even if the mounting surface of the self-resonance sounding type speaker is an uneven structure,
the self-resonant sounding type speaker can be closely attached and it becomes possible to
amplify a very beautiful sound.
[0028]
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According to the present invention, waterproofing can be taken only by coating the surface of the
polymer foam with the waterproof layer.
In addition to coating the waterproof layer on the outer surface of the polymer foam as a
waterproofing measure, it is possible to apply a coating with acid resistant or alkali resistant
material in the measures against chemicals such as strong acid or strong alkali, such liquid or
transpiration state Sound can be generated even in the air.
[0029]
According to the present invention, when the speaker unit is wrapped with a polymer foam, heat
generated by the speaker unit inside may be absorbed. Therefore, as a measure against heat, it is
preferable to provide a current cutoff circuit or a current reduction circuit by operating at a
fraction of the rated input or by providing a thermo switch adjacent to it.
[0030]
By arranging the self-resonant sounding type speaker of the present invention to be
perpendicular to the direction axis to which the acceleration is applied, it is possible to operate
without the influence of the acceleration. For example, it is effective when installed in a vehicle or
the like on which a large acceleration acts such as a spacecraft, a space station, or a jet aircraft.
In addition, the internal speaker unit is less likely to be damaged by receiving the load not only in
the speaker unit but also in the whole of the polymer foam that encloses the speaker unit, and
having the buffer action in the polymer foam itself.
[0031]
In the self-resonant sounding type speaker of the present invention, an amplifier, a power supply
and the like can be enclosed together with a speaker unit in a polymer foam. Further, not only
the wired structure but also the wireless structure do not prevent the application of the present
invention.
[0032]
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As an application example of the self-resonance sounding type speaker of the present invention,
installation in various water-circumferential devices, various oil smoke, dust-producing factories
and machines and equipment operating in the factory can be mentioned.
[0033]
When you want to make a sound from a wall, ceiling, pillar, or floor in a public place, for
example, in a public place without protrusions or a fragile surface, for metal plates, wall
materials, floor materials, and ceiling materials However, according to the present invention, it is
possible to emit sound from the wall surface, the ceiling, and the floor surface without exposing
the speaker.
[0034]
In this case, sound can be generated by closely attaching the polymer foam to the wall surface,
ceiling, column surface, and floor surface to be attached so as to obtain a sufficient volume of the
polymer foam so as to obtain a desired sound volume.
[0035]
The self-resonant sounding type speaker according to the present invention can be provided on a
thin panel-like shoji or a folding screen.
[0036]
Preferably, the self-resonant sounding type speaker is characterized in that a pair of the selfresonant sounding type speakers are erected so as to face the pillow, clothes, mattress or seat
with a predetermined gap.
[0037]
It is possible to protect an outdoor work such as a public wall, a pillar, a ceiling or the like, which
is a place where a sound source can not be exposed in a public space, with a mounting plate, and
mount self-resonant sounding type speakers on the back surface of the mounting plate.
As a result, the mounting of the self-resonant sounding type speaker can be facilitated, and at the
same time, the mounting plate can be made to ring by the vibration of the polymer foam in
contact with the sounding body.
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[0038]
Using self-resonant sounding type speaker on the back side of the mounting plate, using metal
plates provided in vending machines, car wash machines, washing machines, various industrial
machines, which are places to be protected by metal, as mounting plates be able to.
Further, not only metal plates provided in these devices or apparatuses but also panels of various
display units can be used as a mounting plate, and self-resonant sounding type speakers can be
mounted on the back surface thereof.
As a result, the mounting of the self-resonant sounding type speaker can be facilitated, and at the
same time, the mounting plate can be made to ring by the vibration of the polymer foam in
contact with the sounding body.
[0039]
Using self-resonant sounding type speaker on the inner surface of the mounting plate by using
the housing provided in equipment such as toilet, bath, dressing room, kitchen, ceiling back, etc.
which are places where water is likely to be splashed it can.
As a result, the mounting of the self-resonant sounding type speaker can be facilitated, and at the
same time, the mounting plate can be made to ring by the vibration of the polymer foam in
contact with the sounding body.
[0040]
The self-resonant sounding type speaker of the present invention may be applied to a swimming
pool lane marker.
[0041]
The self-resonant sounding type speaker of the present invention may be applied as a guidance
sound lane marker for blind people.
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[0042]
According to the self-resonant sounding type speaker of the present invention, by surrounding
the speaker unit which is the sound source with the polymer foam, the polymer foam can be used
even when the speaker unit alone is difficult to sound or the volume is small. It can resonate,
make a loud sound, or make a rich sound quality.
More specifically, sound can be emitted to the outside as a plane wave through the polymer
foam, and the directivity of the sound is improved by the size and shape of the polymer foam to
amplify the sound. Furthermore, sound control can be made versatile by selectively amplifying
the low-pitched portion etc.
Further, by the amplification function of the polymer foam, it is possible to efficiently utilize the
energy of the lower output sounding vibration and to reduce the noise and the like.
[0043]
When a cone type speaker is used as the speaker unit, the sound generated from the speaker unit
can be amplified by the polymer foam, and the sound can be transmitted to the outside as a plane
wave.
The sound emitted from a cone type speaker is usually irregularly reflected as a spherical wave,
and there is a problem that it becomes unclear sound as it gets farther, but by emitting the sound
as a plane wave, for example, the straightness is improved and attenuated. There are advantages
such as being able to make it difficult to make sounds. Here, the polymer foam allows the cone
(diaphragm) to vibrate with a certain degree of freedom, and has a function of resonating and
amplifying the sound generation vibration.
[0044]
When a magnetostrictive element type speaker is used as the speaker unit, the sound generated
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11
from the speaker unit can be resonated and amplified by the polymer foam. For example, by
setting the planar area of the polymer foam to a large value, it is possible to particularly enrich
the bass portion as compared with the case where the polymer foam is not covered. The same
effect can be obtained when using a hybrid speaker as the speaker unit. Further, by covering the
speaker unit with the polymer foam itself, it can be said that the same effect as the hybrid
speaker can be obtained.
[0045]
When an actuator-type speaker is used as the speaker unit, it is possible to resonate the sound
generation vibration with the polymer foam and emit the sound to the outside. Although the
actuator type speaker does not produce sound without the vibrator, the polymer foam acts not
only as the amplification function as described above but also as a sound producing body.
[0046]
In the self-resonance sounding type speaker of the present invention, the frame of the speaker
unit is not exposed to the outside, so there is a waterproof effect. Thereby, for example, a selfresonant sounding type speaker can be attached to a swimming pool lane marker, and an
underwater sound lane marker can be realized at low cost.
[0047]
In the self-resonance sounding type speaker of the present invention, since it is possible to
eliminate the need to use a special tape for adhesion of a frame or the like of the speaker unit,
there is no problem such as peeling off of the tape. There is no distortion in the sound since the
need for screws to fix the frame is eliminated.
[0048]
The self-resonant sounding type speaker of the present invention is resistant to pressure changes
by covering with a polymer foam, and can be made into an explosion-proof specification. For
example, even in a space such as a spacecraft or space station where the atmospheric pressure
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changes significantly, it is possible to use the self-resonant sound generation type speaker to
make a sound. In addition, the totally explosion-proof structure by covering with the polymer
foam also makes it possible to set the explosion-proof specification in the sense that the
explosive gas is not ignited by the electric spark.
[0049]
In the present invention, by setting the thickness of the polymer foam to 2 mm or more, it is
possible to obtain the minimum number of resonance parts to obtain the above-mentioned
resonance and amplification effects.
[0050]
In the present invention, by providing a mounting plate for transmitting the sound generation
vibration to the outside on the outside of the polymer foam, it is possible to facilitate installation
of the self-resonant sound generation type speaker, and at the same time, make the mounting
plate ring. Can be a phonetic body.
[0051]
In the present invention, by installing the self-resonance sounding type speaker on the inner
surface of the case provided on the external device or the external structure and using the case
as a mounting plate, it is not necessary to provide a separate mounting plate, It is possible to
facilitate installation to equipment.
[0052]
In the present invention, a mounting plate is provided outside the external device or the external
structure, and a polymer foam is mounted on the back surface of the mounting plate, so that a
self-resonant sounding type speaker is mounted on the back surface Even when installation is
difficult, the self-resonant sounding type speaker can be installed at low cost.
[0053]
(A) and (b) are the longitudinal cross-sectional view and the cross-sectional view which show the
principal part of the self-resonance sounding type | mold speaker which concerns on
Embodiment 1 of this invention.
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(A) and (b) are a longitudinal cross-sectional view and a cross-sectional view which show the
cross section of the waist part of the self-resonance sounding type speaker of the embodiment 2.
FIG.
(A) and (b) are the longitudinal cross-sectional view and the cross-sectional view which show the
principal part of the self-resonance sounding type | mold speaker of Embodiment 3 of this
invention.
It is a longitudinal cross-sectional view which shows the principal part of the resonance sounding
type speaker of Embodiment 4 of this invention.
It is a perspective view which shows a mode that a bicycle equipped with the jacket provided
with the self-resonance sounding type speaker of Embodiment 5 of this invention is drive |
operated. (A) and (b) are longitudinal cross-sectional views (cut at orthogonal planes orthogonal
to each other) of the self-resonance sounding type loudspeaker of Embodiment 5 of the present
invention. It is a perspective view which shows a mode that a bicycle equipped with the jacket
provided with the self-resonance sounding type speaker of Embodiment 6 of this invention is
drive | operated. It is a perspective view which shows a mode that a car equipped with the seat
provided with the self-resonance sounding type speaker of Embodiment 7 of this invention is
drive | operated. It is a perspective view which shows a mode that it goes to bed using the pillow
provided with the self-resonance sounding type speaker of Embodiment 8 of this invention. It is a
perspective view which shows the appearance of the patient who is treated using the dental
treatment apparatus provided with the self-resonance sound generation type speaker of
Embodiment 9 of this invention. (A) is a perspective view of the structure containing the selfresonance sounding type speaker of Embodiment 10 of this invention, (b) is a longitudinal crosssectional view, (c) is a cross-sectional view. (A) is a perspective view of the structure containing
the self-resonance sounding type speaker of Embodiment 11 of this invention, (b) is a
longitudinal cross-sectional view, (c) is a cross-sectional view. (A) is a perspective view of the
housing containing the self-resonance sounding type speaker of Embodiment 12 of this
invention, (b) is sectional drawing of a housing. It is a longitudinal cross-sectional view which
shows the state which fixed the self-resonance sounding type speaker of Embodiment 13 of this
invention to the non-mounting surface with an unevenness | corrugation. It is a perspective view
of the self-resonance sounding type speaker of Embodiment 14 of this invention.
[0054]
Hereinafter, Embodiments 1 to 14 in which the present invention is applied to a self-resonant
sounding type speaker will be described in detail with reference to the drawings.
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14
[0055]
The self-resonant sounding type speaker 1 of Embodiment 1 will be described in detail with
reference to FIG.
The self-resonant sounding type speaker 1 includes an actuator type speaker unit 2 (hereinafter
referred to as the speaker unit 2 except when particularly clearly shown) and a polymer foam 3
covering the entire outer surface of the speaker unit 2. It is characterized in that the unit 2 and
the polymer foam 3 are molded integrally.
[0056]
The range of the thickness of the polymer foam 3 is such that the resonance portion can be
secured.
[0057]
It is preferable that it is 2 mm or more, and, as for the range of the thickness of the resonance
part from the polymeric foam 3 to the speaker unit 2, it is more preferable that it is 3 mm or
more.
More specifically, in the case of the small speaker unit 2 (thickness 10 to 20 mm), in the case of
the polymer foam 3 having a thickness of 2 mm to 10 mm, and in the middle or large speaker
unit 2 (thickness 20 mm or more) It is mentioned that the thickness of the foam 3 is 3 mm to 40
mm. The range of the width of the resonance part of the polymer foam 3 is, for example, 100 to
150 mm. The width of the speaker unit 2 is, for example, 30 mm or less. The width of the
resonance portion of the polymer foam 3 is preferably three to five times the width of the
speaker unit 2. The length of the resonance portion of the polymer foam 3 is, for example, 180 to
250 mm.
[0058]
The polymer foam 3 preferably has a closed cell structure, and the expansion ratio is preferably
10 to 30 times.
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[0059]
Examples of the polymer foam 3 include hard urethane foam, hard polystyrene foam, hard
polyethylene foam, hard polypropylene foam, hard phenol foam, hard polyimide foam, hard
polyvinyl chloride foam and the like. .
[0060]
The method of manufacturing the self-resonant sound generation type speaker 1 temporarily
fixes the actuator type speaker unit 2 in the male and female molds at normal temperature, and
completely mixes the liquid polymer foam material (for example, hard polyurethane resin) within
several seconds. , Inject into mold.
Heat is only the heat generation of the foam material.
It is preferred that high magnification foam can be obtained by letting out the pressure which
occurs at the time of foaming naturally without pressure being applied. When the speaker unit is
covered with a polymer foam, the shape of the speaker unit is not deformed and the speaker unit
is not damaged by heat. As described above, it is preferable that the foaming temperature be, for
example, from normal temperature to about 80 ° C. in addition to normal temperature.
[0061]
By surrounding the speaker unit 2 with the polymer foam 3, a resonance effect to resonate them
is realized, sound can be emitted to the outside as a plane wave, and the sound quality becomes
rich. As the frame is not exposed to the outside, it has a waterproof effect. Since it is possible to
eliminate the need for using a special tape for adhesion of a frame or the like, there is no
problem of peeling off the tape. In addition, since the need for fixation using a screw can be
eliminated, no distortion occurs in the sound.
[0062]
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16
The self-resonant sounding type speaker 11 of the second embodiment will be described in detail
with reference to FIG. About the composition which Embodiment 2 shares with Embodiment 1,
explanation is used, and a difference is mainly explained. In the second embodiment, a cone type
speaker 12 is used instead of the actuator type speaker unit 2.
[0063]
The self-resonant sounding type speaker 21 of the third embodiment will be described in detail
with reference to FIG. About the composition which Embodiment 2 shares with Embodiment 1,
explanation is used, and a difference is mainly explained. In the second embodiment, a
magnetostrictive speaker 22 is used in place of the actuator type speaker unit 2. The
magnetostrictive speaker unit 22 preferably includes a bottom plate 22a whose area is set larger
than that of the bottom.
[0064]
In the self-resonance sounding type speakers 1, 11 and 21 of the first to third embodiments, the
number of embedded speaker units is not limited to one, and may be two or more. Moreover, it
can be used as a wall hanging speaker or a hanging speaker.
[0065]
The self-resonant sounding type speaker 101 of the fourth embodiment will be described with
reference to FIG. The description of the configuration in which the fourth embodiment is in
common with the first embodiment will be mainly made by describing differences. The selfresonant sounding type speaker 101 of the fourth embodiment shown in FIG. 4 includes a
speaker unit 102 and a polymer foam 103. The speaker unit 102 is a hybrid speaker including a
bottom plate 114, a side plate 115, and an upper plate 116 which constitute a frame, a vibrating
film 150 which is a sounding body, and a magnet (not shown).
[0066]
The magnet (not shown) may be, for example, a permanent magnet such as a ferrite magnet or a
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neodymium magnet, but is not particularly limited. The sound due to the vibrating membrane
150 and the sound due to the magnet (not shown) can be mixed to enhance the resonance effect.
[0067]
The vibrating membrane 150 and the side plate 115 are formed of an aluminum alloy. Examples
of aluminum alloys that can be used include 1000 series, 2000 series, 3000 series, 5000 series,
6000 series, and 7000 series. As a result, the heat generated by the self-resonant sound
generation type speaker 101 can not be dissipated because it is wrapped with the polymer foam.
In order to solve this, a thermochip (not shown) is used which shuts off the circuit at a constant
temperature or reduces the current of the circuit at a constant temperature.
[0068]
It is preferable to ensure 2 mm or more, and, as for the thickness of the part which contact |
connects the vibrating film 150 among the polymer foam 103, it is more preferable to ensure 3
mm or more.
[0069]
The operation of the self-resonant sounding type speaker 101 according to the fourth
embodiment will be described below.
[0070]
The middle and high-pitched sound is generated from the front side (the vibrating membrane
150 side) and the low frequency sound is generated from the rear side (the bottom plate 114).
Among the sounds generated by the diaphragm 150, high-pitched sound is directly propagated
upward, but low-pitched sound is propagated to the bottom plate 114 through the side plate 115
and is propagated to the polymer foam 103 by the bottom plate 114 vibrating. Be done.
On the other hand, among vibrations of magnets (not shown), high frequency ones are absorbed
by elastic members (not shown) inside the speaker unit 102 and are not transmitted to the
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bottom plate 114, but low frequency ones are elastic members (not shown) Is transmitted to the
bottom plate 114, and the bottom plate 114 vibrates to reproduce the sound of the bass.
[0071]
As described above, since one self-resonant sound generation type speaker 101 according to the
fourth embodiment can faithfully reproduce high and low tones, it is not necessary to separately
provide a speaker for low frequency reproduction such as a woofer.
[0072]
By surrounding the speaker unit 102 with the polymer foam 103, the sound originating from the
vibrating membrane and the sound originating from the magnet (not shown) are mixed to
resonate them and produce a resonance effect for outputting them upward (forward). It can be
realized and the sound quality will be rich.
As the frame is not exposed to the outside, it has a waterproof effect. Since it is possible to
eliminate the need for using a special tape for adhesion of a frame or the like, there is no
problem of peeling off the tape. There is no distortion in the sound as it can be eliminated by
means of screws.
[0073]
The self-resonance sounding type speaker 201 of the fifth embodiment will be described with
reference to FIGS. The description of the configuration in which the fifth embodiment is common
to the first embodiment will be mainly made by describing the difference. The self-resonant
sounding type speaker 201 of the fifth embodiment shown in FIGS. 5 and 6 includes a speaker
unit 202 and a polymer foam 203. The pair is attached to face the shoulder of the jacket 200. As
shown in FIGS. 6 (a) and 6 (b), the polymeric foam 203 is molded to fit the jacket 200 and the
user. The user wearing the jacket 200 can enjoy the music and the like emitted from the selfresonant sounding type speaker 201. It does not have to be attached to the ear like earphones,
and it can also hear surrounding environmental sounds such as signal sounds and warning
sounds, which is highly safe. Although self-resonant sound generation type speakers 201 are
provided on both shoulders in FIG. 5, they may be provided on the arms or back. For the speaker
202, refer to the first to third embodiments.
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19
[0074]
The self-resonance sounding type speaker 301 of the sixth embodiment will be described with
reference to FIG. The description of the configuration in which the sixth embodiment is in
common with the fifth embodiment will be made using the description, and the difference will be
mainly described. The self-resonant sounding type speaker 301 of the sixth embodiment shown
in FIG. 7 has a lower shoulder portion than the self-resonant sounding type speaker 201 of the
fifth embodiment. It is curved in front and back of the human body.
[0075]
The self-resonant sounding type speaker 401 of the seventh embodiment will be described with
reference to FIG. About the composition which Embodiment 7 shares with the above-mentioned
embodiment, explanation is used, and a difference is mainly explained. The self-resonant
sounding type speaker 401 of the seventh embodiment shown in FIG. 8 is mounted so as to face
each other on the head side of the upper portion of the back of the seat 400. It is possible to
hinge and connect the pillow portion to which the self-resonant sound generation type speaker
401 is attached and the seat 400 with a hinge. For the detailed structure of the self-resonant
sounding type speaker 401, refer to the first to third embodiments.
[0076]
The self-resonant sounding type speaker 501 of the eighth embodiment will be described with
reference to FIG. The description of the configuration in which the eighth embodiment is in
common with the above-described embodiments will be made using the description, and the
difference will be mainly described. The self-resonant sounding type speaker 501 of the eighth
embodiment shown in FIG. 9 is a pair of embedded at both ends of the pillow 500. For the selfresonant sounding type speaker 501, refer to the first to third embodiments. Instead of the pillow
500, a self-resonant sound generation type speaker 501 may be provided on the bed.
[0077]
The self-resonance sounding type speaker 601 of the ninth embodiment will be described with
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reference to FIG. The description of the configuration in which the ninth embodiment is in
common with the above-described embodiment will be made using the description, and the
difference will be mainly described. The self-resonance sounding type speaker 601 of the ninth
embodiment shown in FIG. 10 is mounted so as to face the head side of the upper part of the
back of a seat 600 such as a medical institution, for example, a dental clinic. See the first to third
embodiments for the self-resonant sound generation type speaker 601. The seat 600 can be
applied to a seat in a cinema, a concert hall or the like in addition to the one in the medical
institution shown in FIG.
[0078]
The self-resonance sounding type speaker 701 of the tenth embodiment will be described with
reference to FIG. The description of the configuration in which the tenth embodiment is in
common with the above-described embodiment will be made using the description, and the
difference will be mainly described. The self-resonance sounding type speaker 701 of the
embodiment 10 shown in FIG. 11 is protected by a housing 700 such as a public wall, a pillar, a
ceiling, etc. which is an area where a sound source can not be exposed in public space. The
polymer foam 703 covering the unit 702 is attached, and the amplification function of the
polymer foam 703 can be used to generate sound. The housing 700 made of metal acts as a
mounting plate for transmitting the vibration generated by the speaker unit 702 to the outside
through the polymer foam 703. The metal is generally hard to vibrate, but the polymer foam 703
is attached to the metal, and the metal foam is made to sound by vibrating the metal foam
integrally with the polymer foam 703. .
[0079]
The self-resonance sounding type speaker 801 of Embodiment 11 will be described with
reference to FIG. The description of the configuration in which the eleventh embodiment is in
common with the above-described embodiment will be made using the description, and the
difference will be mainly described. The self-resonance sounding type speaker 801 of
Embodiment 11 shown in FIG. 12 is substantially the same as Embodiment 701, except that the
shape of the housing 800 is a curved surface while the housing 700 is a plane. It is an example
applied to things.
[0080]
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Although not shown in the drawings, self-resonant sounding type speakers may be attached to
the backs of vending machines, car wash machines, washing machines, and various industrial
machines, which are places that must be protected by metal. Also, it may be applied to toilets
(body, remote control, room wall ceiling floor), baths (body, remote control, room wall ceiling
floor), dressing rooms, and kitchens, which are places where water may easily catch.
[0081]
The self-resonance sounding type speaker 901 of the twelfth embodiment will be described with
reference to FIG. The description of the configuration in which the twelfth embodiment is in
common with the above-described embodiments will be mainly made using the difference. The
self-resonant sounding type speaker 901 according to the twelfth embodiment shown in FIG. 13
has a speaker unit 902 and a polymer foam 903 covering the speaker unit 902 directly in a
casing 900, and the polymer foam 903 is It is not exposed to the outside.
[0082]
The self-resonance sounding type loudspeaker 1001 of the thirteenth embodiment will be
described with reference to FIG. The description of the configuration in which the thirteenth
embodiment is in common with the above-described embodiments will be made using the
description, and the difference will be mainly described. The self-resonance sounding type
speaker 1001 of the embodiment 13 shown in FIG. 14 is obtained by injecting and solidifying the
polymer foam 1003 directly when the non-mounting surface 1000 of the object 1005 has a
concavo-convex shape. First, the speaker unit 1002 is temporarily fixed at a position where it can
be covered with the polymer foam 1003, and the polymer foam 1003 is injected into the gap
between the speaker unit 1002 and the non-mounting surface 1000 and solidified. The selfresonant sounding type speaker 1001 can be easily fixed even with the uneven mounting nonmounting surface 1000 which is difficult to fix.
[0083]
The self-resonance sounding type speaker 1101 of the fourteenth embodiment will be described
with reference to FIG. The description of the structure in which the fourteenth embodiment is in
common with the above-described embodiment will be made using the description, and the
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difference will be mainly described. The self-resonant sounding type speaker 1101 of the
fourteenth embodiment shown in FIG. 15 is obtained by covering an amplifier 1120, a battery
1130, and a wireless module 1140 together with a speaker unit 1102 with a polymer foam
1103. The self-resonance sounding type speaker of the above embodiment can be connected to
an external amplifier or the like from the speaker unit by wire, but the self-resonance sounding
type speaker 1101 of Embodiment 14 is freely carried and used by being wireless. . As shown in
FIG. 15, the self-resonant sound generation type speaker 1101 is used as a cushion or pillow as it
is by using the polymer foam 1103 or the self resonance type sound generation type speaker
1101 is wrapped with another elastic body to be a cushion or pillow It is also possible (see FIG.
9).
[0084]
The self-resonance sounding type speaker 1101 is manufactured by temporarily fixing the
amplifier 1120, the battery 1130, and the wireless module 1140, and filling and foaming the
polymer foam 1103 so as to encase them and solidifying them. The entire outer surface of the
speaker unit 1102 is covered with the polymeric foam 1103, but the amplifier 1120, the battery
1130, and the wireless module 1140 do not necessarily have to be entirely covered with the
polymeric foam 1103. May be exposed for the convenience of external operations and
maintenance. Not limited to this, a polymer foam 1103 molded in advance is attached to the
speaker unit 1102 and integrated with the amplifier 1120, the battery 1130, and the wireless
module 1140, or a polymer foam molded in advance By embedding a speaker unit 1102, an
amplifier 1120, a battery 1130, and a wireless module 1140 in 1103, a self-resonant sound
generation type speaker 1101 can be manufactured.
[0085]
The present invention is not limited to the above-described embodiment, and modifications and
the like can be added without departing from the technical concept of the present invention. It is
included in the technical scope of the present invention. In the fifth to ninth embodiments, the
self-resonant sounding type speaker may be moved, for example, the self-resonant sounding type
speaker may be hingedly connected to a seat, a pillow or the like. Further, the self-resonant
sounding type speaker may be accommodated in the seat or pillow. In a movie theater, a speaker
for bass may be separately provided. In a movie theater, a sound for a screen disposed in front
and a dubbing sound can also be output from the self-resonant sounding type speaker 10 of the
seat, and voice and sound can be heard simultaneously. Furthermore, it can be used for wall
hanging speakers or hanging speakers.
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[0086]
1, 11, 21, 101, 201, 301, 401, 501, 601, 701, 801, 901, 1001, 1101 ... self-resonance sounding
type speaker 2, 12, 22, 102, 202, 302, 402, 502 , 602, 702, 802, 902, 1002, 1102 ... speaker
unit 3, 13, 103, 203, 303, 403, 503, 603, 703, 803, 903, 1003, 1103 ... polymer foam
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