JP6322793B2 - Universal speaker - Google Patents

Description

  The present invention relates to a universal speaker that can be heard by both a hearing person and a hearing person, and more particularly, a universal speaker that can be heard by a hearing person and a hearing person without wearing a hearing aid.

  “Sound” is the vibration of an object transmitted through a substance such as air, and is supposed to be perceivable by the human auditory organ called the ear. In other words, sound is generated from a vibrating object, and when sound is transmitted through the air, the object vibrates and the nearby air is pushed so that only that part becomes dark, and the dark part is near. Press again to reach the ear by moving the dark part of the air. Then, the air that reaches the ear vibrates the eardrum in the ear, and the vibration signal is transmitted to the brain.

  In this way, the sound travels as a longitudinal wave that swings in the same direction as the traveling direction, that is, the direction in which the gas molecules in the air are swung by being pushed or pulled. In addition, when sound is transmitted, a thin part (sparse) and a dense part (dense) of air are alternately transmitted as a wave, and this longitudinal wave is also called “sparse / dense wave”.

  Many of the speakers built into general audio equipment are dynamic type speaker units. These speaker units are inserted into a donut-shaped magnet (permanent magnet) and a cylindrical space corresponding to a hole inside the magnet. And at least a conically shaped diaphragm (cone) attached to the voice coil. In such a speaker, when a voice signal flows through the voice coil, the voice coil vibrates in the front-rear direction in accordance with the waveform, and the diaphragm attached to the voice coil vibrates together, resulting in a waveform equal to the voice signal. The longitudinal wave is generated and emitted.

  In addition, a planar speaker in which a flat diaphragm (planar diaphragm) is fixed to a rectangular frame so as to be able to vibrate is also known. Such a planar speaker is caused by the vibration of the planar diaphragm. Air is pushed in parallel over a wide area to create a sparse wave (longitudinal wave) and emit sound (eg, see Patent Document 1).

  On the other hand, in recent years, the number of hearing-impaired people such as senile deafness due to aging, organic deafness with impairments in the outer ear, middle ear, inner ear, cochlear nerve, etc., and functional deafness due to stress has increased. The number of deaf people in Japan is said to be 20 million. In the case of hearing loss, not only can you hear the sound, it becomes difficult to distinguish clearly even if you hear the sound, you can not respond to the other party's language, or you do not understand the content of the conversation well and answer If you do, you may misunderstand the other party, or you may hear it many times in the middle of the conversation, which may make it difficult for you to communicate smoothly. For this reason, it is difficult to talk to people without knowing it because of hearing loss, and there are fewer opportunities to meet people, and people tend to stay at home without going out.・ It is said that there may be a problem of alienation.

  As a means for reducing such inconvenience of hearing loss, a hearing aid is generally used. Further, when watching TV, there is an FM transmitter that connects to an earphone jack of a TV, skips sound by FM radio waves, and receives the sound by FM radio on hand to acquire TV sound.

However, hearing aids are not used very much because they are bothersome and embarrassed to wear, and they are often used unavoidably. In addition, there are many hearing aids that pick up noise, and on the contrary, there are cases where the stress is high.
On the other hand, when an FM transmitter is used, there is an annoyance that an FM transmitter must be prepared and installed every time a television is viewed. Further, there is a problem that the output destination of the sound is switched by connecting the FM transmitter to the earphone jack, so that the hearing impaired person and the normal hearing person cannot both watch the television without inconvenience.

  By the way, it has been reported that the sound generates not only a rough wave (longitudinal wave) but also a transverse wave that swings in a direction perpendicular to the traveling direction. This transverse wave is less attenuated by the distance from the sound source than the longitudinal wave, and has a feature that it can be heard by people with hearing loss. In addition, the transverse wave has a feature that interference does not occur between the transverse waves or between the transverse wave and the longitudinal wave.

  Therefore, as a speaker that generates a transverse wave that can be heard by a hearing-impaired person, a hollow housing, a drive unit accommodated in the housing, and a curved diaphragm that is erected by bending a flat plate on the surface of the housing are provided. In addition, there has been proposed one in which the vibration of the diaphragm of the drive unit is transmitted to the curved diaphragm and the casing, and sound is emitted from the diaphragm, the curved diaphragm and the casing of the drive unit (for example, Patent Documents). 2).

  However, the speaker described in Patent Document 2 uses two diaphragms, a diaphragm of the drive unit and a curved diaphragm erected on the surface of the housing, and a normal hearing person can hear from the diaphragm of the drive unit. A longitudinal wave is generated, and a transverse wave that can be heard by the hearing impaired person is generated from the curved diaphragm, and each sound is emitted. Therefore, the speaker described in Patent Document 2 does not enable sound emission so that the hearing impaired person and the normal hearing person can hear together with one diaphragm.

  Also, in order to radiate a clear sound with a high sound volume, it is ideal to transmit all of the kinetic energy for driving the driver's diaphragm converted from electric energy to the curved diaphragm side. However, the speaker of Patent Document 2 has various factors that reduce energy transmission efficiency when kinetic energy converted from the electrical energy of the audio signal is transmitted to the curved diaphragm side. For this reason, it is considered that the speaker of Patent Document 2 does not efficiently transmit the movement (vibration) of the diaphragm of the drive unit to the curved diaphragm side and cannot emit a clear sound with higher volume.

  That is, in the case of the speaker disclosed in Patent Document 2, since the flat plate-like curved diaphragm is held by an upright bar, the curved diaphragm is easily affected by external force or the like, and the energy transmission efficiency is lowered. It is thought that there is a possibility that In addition, since the drive unit is installed in a suspended state on the top surface of the housing, the installation of the drive unit is unstable, and the kinetic energy that drives the driver's diaphragm is sufficiently transmitted to the curved diaphragm side. It is thought that it cannot be done. Further, since the frame and the diaphragm constituting the drive unit, and the frame and the magnetic circuit mounting plate are respectively fixed, the movement of the diaphragm of the drive unit caused by the magnetic circuit disposed on the magnetic circuit mounting plate is observed. It is considered that the kinetic energy transmitted to the curved diaphragm side is reduced (offset) by the reaction of the diaphragm of the drive unit.

JP-A-62-278900 Japanese Patent No. 5393915

  The present invention has been made in view of the above circumstances, and provides a technique for efficiently transmitting kinetic energy converted from electrical energy of a voice signal to one diaphragm, and by producing a clear sound with higher sound volume. An object of the present invention is to provide a universal speaker that enables a hearing impaired person and a normal hearing person to listen together without inconvenience.

  A first universal speaker according to the present invention can be heard by both a hearing person and a normal hearing person, and includes a plate-like diaphragm and a driver that vibrates the diaphragm according to an input electric signal. A hollow structure housing the unit and the diaphragm and the driver unit, wherein the housing has an opening on one surface, and the driver unit has a surface direction of the diaphragm. The other end of the diaphragm is in contact with the edge of the diaphragm so as to be driven in the same direction, and is fixedly attached to the housing. The diaphragm is opposed to one end from which the driver unit is attached. A curved surface portion that curves as it goes toward is formed so as to cover the opening of the housing, and both side edges are supported by the housing, and both side edges of the diaphragm are Left and right sides of the housing Characterized in that the inner surface is supported with a guide convex portion curved respectively provided.

  Further, in the second universal speaker according to the present invention, in the first universal speaker, a large number of edge support members for supporting the diaphragm partially in point contact are arranged on the upper surface of the guide convex portion. It is characterized by.

  The universal speaker according to the present invention forms a curved surface portion in which a flat plate-like diaphragm is curved from one end side toward the opposite other end side, and is driven in the same direction as the surface direction. The edge portion is attached in contact with the driver unit. Therefore, the sound can be emitted with a high sound volume.

  In addition, the universal speaker according to the invention has the driver unit main body fixed to the housing, so that the installation of the drive unit to the housing is stable and is generated from the driver drive unit. The kinetic energy can be sufficiently transmitted to the curved diaphragm side. In addition, since the drive unit and the main unit of the drive unit, and the drive unit and the housing of the drive unit are both fixed, the movement of the drive unit of the drive unit is not suppressed, and the drive unit drive unit There is no risk that the kinetic energy transmitted to the curved diaphragm side will be reduced (cancelled) by the reaction. Therefore, the kinetic energy converted from the electrical energy of the audio signal can be efficiently transmitted to one diaphragm, and the sound volume can be increased and the sound can be emitted clearly.

  Furthermore, the universal speaker according to the invention is arranged so that the diaphragm is arranged so as to cover the opening of the hollow housing having the opening on one side. There is no risk of reducing transmission efficiency. Therefore, it is possible to further improve the sound emission.

In addition, both side edges of the diaphragm are supported by curved guide projections provided on the inner surfaces of the left and right side plates of the housing, respectively, so that the curved diaphragm is not affected by external force or the like. The risk of lowering the energy transmission efficiency can be reduced. In addition, the curved diaphragm is supported by the housing via a number of edge support members, so that the curved diaphragm vibrates relatively freely, while the edge support member absorbs or releases the vibration energy of the curved diaphragm. , Vibrations are less likely to be transmitted to the housing, and energy loss can be reduced. As a result, sound emission from the universal speaker can be maximized.

Therefore, a universal speaker that efficiently transmits kinetic energy converted from the electrical energy of the audio signal to a single diaphragm, and allows both the hearing impaired and the normal hearing to listen together without inconvenience through a clearer sound with higher volume. Can be provided. Also, if you keep listening to the sound for a long time, the rate of dementia will decrease.
Moreover, the universal speaker according to the present invention can be made easy for the hearing impaired person to hear the noisy person without feeling noisy even when the healthy person and the hearing impaired person hear the same sound at the same time.

The clear mechanism (mechanism) why both the normal hearing person and the hearing impaired person can be heard in the universal speaker according to the present invention is unknown, but is estimated as follows.
First, in addition to longitudinal waves, it is said that transverse waves, bending waves, and torsional waves (hereinafter referred to as “shear waves”) are generated in solids. In addition, there is an idea of duality between particles and waves that all materials and energies have both particle-like and wave-like properties. Therefore, in the universal speaker according to the present invention, vibration emitted into the air from the curved surface portion of the curved diaphragm is converted into a dense wave of air molecules, and can be heard by a normal hearing person. A new vibration (shear wave) called a perturbation is generated in the air molecules, so that the deaf person can hear.

It is a front view which shows the basic structure of the universal speaker which concerns on this invention. It is a front center longitudinal cross-sectional view of the universal speaker shown in FIG. It is a schematic diagram explaining the curved state of the diaphragm of the universal speaker which concerns on this invention. It is the schematic explaining the structure of the driver unit of the universal speaker which concerns on this invention. It is (a) front view and (b) front center longitudinal cross-sectional view explaining the structure of the housing | casing of the universal speaker which concerns on this invention. The 1st means which attaches a diaphragm with respect to the driver unit of the universal speaker which concerns on this invention is demonstrated, (a) The partial expanded side view which shows the state before attachment, (b) The partial expansion front which shows the state after attachment FIG. The 2nd means which attaches a diaphragm with respect to the driver unit of the universal speaker which concerns on this invention is demonstrated, (a) The partial expanded side view which shows the state before attachment, (b) The partial expansion front which shows the state after attachment FIG. It is the (a) front view and (b) front center longitudinal cross-sectional view explaining the state which provided the guide convex part in the housing | casing of the universal speaker which concerns on this invention. It is a front center longitudinal cross-sectional view explaining the state which provided the supporting member of the diaphragm on the upper surface of the guide convex part provided in the housing | casing shown in FIG. FIG. 9A is a front view and FIG. 9B is a front center vertical cross-sectional view illustrating a state in which a shock-absorbing member for a diaphragm is provided on the upper surface of a guide convex portion provided in the housing illustrated in FIG. 8. It is a front center longitudinal cross-sectional view explaining the state which provided the guide recessed part in the housing | casing of the universal speaker which concerns on this invention. It is a front center longitudinal cross-sectional view explaining the state which provided the recessed part for support members in the housing | casing of the universal speaker which concerns on this invention, and has arrange | positioned the support member in it. It is another structure of the universal speaker which concerns on this invention, Comprising: It is a front center longitudinal cross-sectional view which shows the state which attached the two diaphragm with respect to one driver unit. It is another structure of the universal speaker which concerns on this invention, Comprising: It is a front center longitudinal cross-sectional view which shows the state which attached the two diaphragms from which a bending angle differs with respect to one driver unit. It is another structure of the universal speaker which concerns on this invention, Comprising: It is a front center longitudinal cross-sectional view which shows the state which attached the two diaphragms from which a magnitude | size differs with respect to one driver unit. It is another structure of the universal speaker which concerns on this invention, Comprising: It is a front center longitudinal cross-sectional view which shows the state which attached the three driver units with respect to one diaphragm. In another structure of the universal speaker according to the present invention, a driver unit is attached to each of one end and the other end of one diaphragm, and an electric signal input to each driver unit is divided into two frequency bands. It is a front center longitudinal cross-sectional view which shows the state provided with. Another structure of the universal speaker according to the present invention, wherein driver units having different structures are attached to one end side and the other end side of one diaphragm, and an electric signal input to each driver unit is divided into two frequency bands. It is a front center longitudinal cross-sectional view which shows the state provided with the means to divide | segment. In another structure of the universal speaker according to the present invention, two diaphragms having different sizes are provided, a driver unit is attached to each diaphragm, and two electrical signals are input to each driver unit. It is a front center longitudinal cross-sectional view which shows the state provided with the means to divide | segment into a frequency band. Another structure of the universal speaker according to the present invention, in which two diaphragms having different sizes are provided, driver units having different structures are attached to the diaphragms, and electric signals inputted to the respective driver units It is a front center longitudinal cross-sectional view which shows the state provided with the means to divide | segment into 2 frequency bands.

Next, an example of an embodiment of the present invention will be described.
Although the embodiments described below are preferred specific examples of the present invention, various technical limitations are applied. However, the scope of the present invention is described as being particularly limited in the following description. As long as it is not, it is not restricted to these forms.

  As shown in FIGS. 1 and 2, the universal speaker 10 of the present invention can be heard by both the hearing impaired person and the normal hearing person, and includes at least a diaphragm 1, a driver unit 2, and a housing 3. It is comprised by providing.

As shown in FIG. 2, the diaphragm 1 forms a curved surface portion that curves from the one end 1 a side toward the opposite other end 1 b side, and covers the opening 39 of the housing 3. It is arranged in. That is, the diaphragm 1 is a flat and thin member such as a film or a sheet, and is formed so as to have a curved surface portion that is curved in advance. It can be a curved surface portion that can be curved.
At least one end of the diaphragm 1 is attached to the driver unit 2.

  The diaphragm 1 is attached to the housing 3 so that the curved convex surface faces the front in the case of a member molded in advance so as to have a curved surface portion that is curved. In the case of a flexible member, the diaphragm 1 stands up. It is attached to the driver unit 2 in a flat plate state, and is bent and deformed elastically from this state to form a curved surface, and is attached to the housing 3 with the deformed curved convex surface side facing forward. The curved diaphragm (hereinafter referred to as “curved diaphragm”) 1 preferably has a curved portion with a bending angle of 90 ° or slightly larger, specifically, a bending angle of 90 ° to 130 °. And good.

That is, the shear wave is generated by bending the curved diaphragm 1, but the generated sound pressure changes depending on the bending angle. Specifically, the generated sound pressure is highest in the curved diaphragm 1 having a curved surface portion having a bending angle of 110 ° ± 20 °.
Here, as shown in FIG. 3, the bending angle of the curved surface portion means an angle indicated by the intersection of the perpendicular to the one end 1 a side of the curved diaphragm 1 and the perpendicular to the other end 1 b side.

In FIG. 3, the diaphragm 1 in a planar state is indicated by a dotted line, and as shown by an alternate long and short dash line in the figure, the diaphragm 1 is curved so as to bend from the one end 1 a side to the opposite other end 1 b side. The state of being bent so as to form is shown by a solid line. Therefore, the bending angle of the curved surface portion of the curved diaphragm 1 at this time is indicated by an angle θ at a point O where a perpendicular to the one end 1a and a perpendicular to the other end 1b intersect, and the angle θ is 90 ° to It is 130 °.
In FIG. 2, the curved diaphragm 1 is arranged so as to cover the opening 39 of the housing 3, and the edge portion (one end 1 a side) of the driver is fixedly attached to the housing 3. A state in which the unit 2 is attached in contact with the upper surface of a diaphragm driving unit 26 (described later) at a substantially right angle (90 °) is shown.

  As the material of the curved diaphragm 1, paper such as carbon paper, flexible plastic such as polyimide and polyester, wood such as balsa material, and metal such as aluminum, beryllium, and boron can be used. Further, the thickness of the curved diaphragm 1 is not particularly limited as long as it can be molded in advance to have a curved surface portion that is curved or can be elastically bent and deformed.

  The driver unit 2 is an actuator that vibrates the curved diaphragm 1 in accordance with an input (energized) electric signal (audio signal), and is driven in the same direction as the surface direction of the curved diaphragm 1. 1 is attached in contact with the edge portion. That is, the driver unit 2 is connected to the end surface portion of the curved diaphragm 1 and attached so as to apply vibration to the end surface portion of the curved diaphragm 1. Further, examples of the electric signal input to the driver unit 2 include an audio signal output from a television, a radio, an audio player, a personal computer, a smart device such as a smartphone or a tablet, or the like.

  Here, in order to generate a large volume, a large diaphragm and a large electric power are required. However, this can also be achieved by applying a force (vibration) larger than that of the driver unit 2 to the curved diaphragm 1. it can. Examples of such a driver unit (hereinafter sometimes simply referred to as “driver”) 2 include a moving magnet type actuator and a moving coil type actuator.

  That is, in order to realize a phenomenon in which a shear wave is generated from the curved surface portion of the curved diaphragm 1, sound is reproduced by a moving magnet type actuator or a moving coil type actuator. A moving magnet type actuator can drive a diaphragm with a larger mass even when an electric signal of the same magnitude as that of a moving coil type actuator is input. It is advantageous in design in that it can be made smaller than a service actuator. On the other hand, the moving coil type actuator is advantageous in design in that the stroke when driving the curved diaphragm 1 is large and a wide frequency band (sound range) can be obtained.

The moving magnet type driver 2 sends an audio signal to a voice coil around the magnet, and the magnet placed at the center vibrates by obtaining a relatively strong driving force due to a change in the magnetic field of the voice coil. The sound pressure generated from can be increased.
This moving magnet type driver 2 can be shown, for example, in FIG.

The moving magnet type driver 2 shown in FIG. 4 has a cylindrical pole piece 24 in which a voice coil 23 is arranged on the inner wall surface of a cup-shaped yoke 21 and a magnet (permanent magnet) 25 is provided on the inner side. It is arranged. Furthermore, a driver circuit 22 that receives an electric signal from the outside is arranged inside the yoke 21.
In this moving magnet type driver 2, when the voice coil 23 receives electrical energy from the driver circuit 22, a magnetic gap is formed between the voice coil 23 and the outer peripheral surface of the pole piece 24, thereby constituting a magnetic circuit. doing.

  In addition, a disk-shaped metal diaphragm drive unit 26 is provided on the top of the pole piece 24, and the lower end of the pole piece 24 is disposed in the magnetic gap. That is, the diaphragm driving unit 26 is provided at the top end of the driver 2, and the lower end of the pole piece 24 is disposed in the magnetic gap of the magnetic circuit.

  Thus, the driver 2 can drive the pole piece 24 having a large mass as a moving magnet type, and the diaphragm with a greater force than a moving coil type actuator that drives a light mass coil. Can be vibrated. That is, the moving magnet type actuator is advantageous in size because it can reduce the size of the actuator housing when driving a diaphragm having a large mass compared to the moving coil type actuator. It becomes easy to integrate the amplifier (driver circuit 22). Note that the driver circuit 22 may be provided outside the yoke 21 that is a housing of the actuator, and can thereby be further reduced in size.

The driver 2 converts the energy of the electric signal into kinetic energy as reciprocating motion of the magnet 25 (pole piece 24), and this kinetic energy is parallel to the surface direction of the curved diaphragm 1 via the diaphragm driving unit 26. It is possible to generate sound by adding various vibrations. In FIG. 4, the vibration direction of the diaphragm driving unit 26 is indicated by an arrow.
The electrical signal is an amplifier drive signal supplied from a TV, radio, audio player, personal computer, smart device such as a smartphone or tablet, etc. (not shown) according to the sound to be generated, and drives a normal amplifier. It is the same as the electrical signal for

The housing 3 is a box-shaped hollow structure that accommodates the curved diaphragm 1 and the driver unit 2, and as shown in FIG. 5, the bottom plate 31, the front plate 32, the back plate 33, the left and right sides Side plates 34, 34, and has an opening 39 on one side.
In FIG. 5, the housing 3 has a rectangular bottom plate 31 covering the bottom surface portion, a horizontally elongated front plate 32 partially covering the lower portion of the front portion, and a rectangular shape covering the entire rear surface portion. It is shown as being formed by a back plate 33 and left and right side plates 34 and 34 having a substantially ginkgo shape that covers a side surface portion between the front plate 32 and the back plate 33 so that the upper edge is arcuate. Moreover, the housing | casing 3 is what was opened from the front part in which the front board part 32 was provided to the top | upper surface part, and is shown as having the opening part 39 in the whole surface.

  In addition, a flange 35 is provided at the upper edge of the front plate 32 so as to partially cover the diaphragm driving unit 26 side of the driver unit 2 accommodated. Fixing pieces 36 and 36 are provided so as to be in contact with 34 respectively.

  Although not shown in the figure, a horizontally-long rectangular gap is provided below the back plate 33 of the housing 2 so that the low frequency range is emitted with the space on the back side of the curved diaphragm 1 open. Is considered.

  The driver unit 2 is fixedly attached inside the casing 3. That is, the driver unit 2 receives a reaction due to the driving of the magnet 25 when the curved diaphragm 1 is driven. However, the driver unit 2 can be driven by driving the curved diaphragm 1 by fixing the driver unit 2 in contact with the housing 3. The case 3 can be vibrated by the reaction to increase the sound pressure coming out.

  Further, the curved diaphragm 1 is in contact with and coupled to the diaphragm driving unit 26 at the upper end of the driver 2 fixedly attached inside the housing 3. The mounting of the curved diaphragm 1 to the diaphragm driving part 26 of the driver 2 is problematic because sound is emitted even if the end face part of the curved diaphragm 1 is in contact with the diaphragm driving part 26 of the driver 2 even if it is oblique. However, in order to prevent a decrease in volume, it is desirable that the end surface portion of the curved diaphragm 1 abuts on the diaphragm driving portion 26 of the driver 2 at a substantially right angle, and at this time, the maximum volume is obtained.

  The coupling between the diaphragm driving unit 26 of the driver 2 and the curved diaphragm 1 is not particularly limited as long as both are brought into contact with each other at a substantially right angle. Therefore, for example, the edge part of the curved diaphragm 1 may be brought into contact with and coupled to the diaphragm driving unit 26 by using the holding tool 4 shown in FIG. The clamping tool 4 is a vibration transmission fixture that has a sandwiching structure with spring elasticity and efficiently transmits the vibration from the diaphragm driving unit 26 of the driver 2 to the curved diaphragm 1.

  In FIG. 6, the holding tool 4 is kept closed by spring elasticity and is properly opened by inserting an end edge portion of the curved diaphragm 1 so as to sandwich and support the curved diaphragm 1. Is shown as comprising. Accordingly, in FIG. 6, the clamping tool 4 is fixed to the upper surface of the diaphragm driving unit 26 of the driver 2, and the edge of the curved diaphragm 1 is inserted from above the clamping port 41 in the clamping tool 4 (FIG. 6 ( a)), and shows a state in which the vibration plate driving portion 26 of the driver 2 and the end edge portion of the curved vibration plate 1 are supported by the clamping tool 4 so as to be in contact with each other at a substantially right angle. (See FIG. 6B).

  In this way, in order to prevent transmission loss at the connecting portion between the diaphragm driving portion 26 and the curved diaphragm 1 by using the holding tool 4 having a spring elastic material or structure, the diaphragm driving even in long-term use. The initial energy transfer efficiency can be maintained without any loosening between the portion 26 and the curved diaphragm 1.

  Further, in the joining method of the diaphragm driving unit 26 and the curved diaphragm 1, for example, the edge portion of the curved diaphragm 1 is brought into contact with and coupled to the diaphragm driving unit 26 using the holding tool 14 shown in FIG. It may be a thing. The holding tool 14 has a structure in which the lateral direction of the end face portion of the curved diaphragm 1 is entirely sandwiched and the interval between the sandwiched pieces can be adjusted, and the vibration from the diaphragm driving unit 26 of the driver 2 is curved and vibrated. It is a vibration transmission fixture that efficiently transmits to the plate 1.

  In FIG. 7, the holding tool 14 is a metal fitting in which a bottom surface portion and a side surface portion are connected in a substantially L shape, and the two side surfaces are opposed to each other with an appropriate interval therebetween. It is shown that it is provided with a clamping opening 42 that allows the end edge of the curved diaphragm 1 to be inserted. Therefore, in FIG. 7, the clamping tools 14 and 14 are fixed to the upper surface of the diaphragm driving unit 26 of the driver 2, and the edge of the curved diaphragm 1 is inserted from above the clamping opening 42 of the clamping tools 14 and 14. (See FIG. 7 (a)), and then tightening the stoppers 17 (17A, 17B) so that the distance between the side surfaces is narrowed, whereby the diaphragm driving part 26 of the driver 2 and the edge of the curved diaphragm 1 A state is shown in which the holding parts 14 and 14 are supported so as to be in contact with and coupled to each other at a substantially right angle (see FIG. 7B). That is, it is shown that the end edge portion of the curved diaphragm 1 is sandwiched between two plates, and the end edge portion is screwed so that the end edge portion comes into contact with the diaphragm driving portion 26 of the driver 2 at a substantially right angle. ing.

  By using the holding tool 4 having a structure capable of adjusting the holding interval in this way, even when the thickness of the curved diaphragm 1 is different, the tightening degree is adjusted so that it can be held with an appropriate force and surely. I can do it. In addition, transmission loss at the connecting portion between the diaphragm driving unit 26 and the curved diaphragm 1 is prevented, and no slack or the like occurs between the diaphragm driving unit 26 and the curved diaphragm 1 even in long-term use. Energy transmission efficiency can be sustained.

  As described above, the curved diaphragm 1 is separated at two points by the holding tool 4 (14) attached to the diaphragm driving unit 26 of the driver 2 and the left and right fixing pieces 36, 36 provided on the back plate 33 of the housing 3. The curved diaphragm 1 is held in an arch shape from the front surface portion to the top surface portion of the housing 3 and is arranged so as to cover the opening 39.

In the present invention, the curved diaphragm 1 may constitute a part of the housing 3. That is, the curved diaphragm 1 may be separately configured with the same member as the casing 3 and combined, or the curved diaphragm 1 may be formed integrally with the casing 3.
When the curved diaphragm 1 is made a part of the casing 3 in this way, a part of the casing 3 to be the curved diaphragm 1 uses the same member as the other casing 3 portion, so the manufacturing process is labor-saving. In addition, it is possible to obtain a universal speaker having an effect that both the hearing-impaired person and the normal hearing person can hear it without inconvenience by vivid sound emission with a higher volume while suppressing the cost of the member.

  Further, it is desirable that the curved diaphragm 1 is arranged so that both side edges are supported by the housing 3. That is, in order to support the curved diaphragm 1, a curved guide convex portion may be provided on the side plate 34 of the housing 3, and the flat diaphragm 1 may be attached along the curved surface. Therefore, this guide convex part is also a diaphragm bending assisting tool that efficiently bends the standing diaphragm 1 in a flat plate state. Here, both side edges refer to side edges along the direction from one end to the other end. Moreover, such a guide convex part 5 can be shown, for example in FIG.

  In FIG. 8, the guide convex portion 5 is formed by arc-shaped convex pieces formed in a shape that draws an obliquely upward arc from the front surface portion to the top surface portion of the housing 3, and the left and right side plates 34, 34 of the housing 3. It is shown as being attached to each inner surface.

  Therefore, when the diaphragm 1 in a flat standing state is curved for generating shear waves, the guide convex portion 5 formed in a bent shape so as to have a predetermined curved surface is attached to the inner surface of the side plate 34 of the housing 3. When the diaphragm 1 is easily curved from the one end side toward the opposite other end side, the side edge portion is preferably supported by the upper surface of the guide convex portion 5 attached to the housing 3.

  By using the guide convex portion 5 in this way, the standing diaphragm 1 attached to the driver 2 is easily bent along the upper surface of the guide convex portion 5 and moves from one end side to the opposite other end side. Therefore, the curved diaphragm 1 can be arranged to facilitate the formation of a curved surface portion. In addition, by supporting the side edge portions of the curved diaphragm 1 on the housing 3, it is possible to reduce the risk that the curved diaphragm 1 is reduced in energy transmission efficiency without being affected by external force or the like. It will be possible.

  Further, when the guide protrusions 5 are provided so that both side edges of the curved diaphragm 1 are supported by the housing 3, for example, as shown in FIG. 9, a cone, a triangular pyramid, a hemisphere, called a spike or an insulator A large number of the edge support members 6 having a shape may be arranged on the upper surface of the guide convex portion 5, and the curved diaphragm 1 may be partially supported by the edge support member 6 by point contact. That is, both side edge portions of the curved diaphragm 1 can be supported by the housing 3 via the edge support member 6 and the guide convex portion 5. The edge support member 6 is made of an elastic material such as rubber, or a hard material such as wood, stone, or metal.

  In FIG. 9, the edge support members 6 are shown as having a conical shape, and 17 edge support members 6 are arranged at regular intervals so as to protrude from the upper surface of the guide convex portion 5 attached to the side plate 34 of the housing 3. Is shown as The number of edge support members 6 is not particularly limited, and can be appropriately arranged.

  As described above, the curved diaphragm 1 is supported by the casing 3 via the edge support member 6, so that the curved diaphragm 1 vibrates relatively freely, while the edge support member 6 generates vibration energy of the curved diaphragm 1. Absorbing or escaping, it is difficult for vibration to be transmitted to the housing 3, and energy loss can be reduced.

  Although not shown, when the curved diaphragm 1 is to be partially supported by point contact, the edge support member 6 is directly attached to the side plate 34 so as to protrude inward from the side plate 34 of the housing 3. It is good as a thing. In this case, the edge support member 6 is not limited to a conical shape, a triangular pyramid shape, and a hemispherical shape, but may be a cylindrical shape.

  Further, when the guide convex portion 5 is provided so that both side edges of the curved diaphragm 1 are supported by the housing 3, for example, as shown in FIG. It is also possible to provide a vibration buffer member 16 that functions to prevent the generation of abnormal noise due to contact with the guide portion, and to support the curved diaphragm 1 by line contact with the vibration buffer member 16.

  A material that is soft and hardly transmits vibration can be applied to the vibration buffer member 16, and the side edge portion of the curved diaphragm 1 and the vibration buffer member 16 on the guide convex portion 5 are in close contact with each other. ing. As such a vibration buffer member 16, for example, a highly elastic sheet material such as foamed urethane resin, rubber, nonwoven fabric or the like can be used.

  In FIG. 10, the vibration damping member 16 is shown as having a band shape, and is arranged so as to cover the upper surface of the guide convex portion 5 attached to the side plate 34 of the housing 3. A sealed space is shown as being formed.

  By supporting the curved diaphragm 1 through the vibration buffer member 16 in this way, the curved diaphragm 1 vibrates relatively freely, while the vibration energy of the curved diaphragm 1 is transferred to the housing 3 by the vibration buffer member 16. It is difficult to be transmitted and energy loss is small. Further, since a sealed space is formed between the curved diaphragm 1 and the housing 3, the sound wave emitted from the front surface (front surface) and the sound wave emitted from the back surface (rear surface) of the vibration plate are vibration-damped. It can be blocked by the member 16 and no interference attenuation of sound waves on the front and back surfaces can occur, and a stable sound pressure and a wide frequency band characteristic can be obtained.

  Further, when both side edges of the curved diaphragm 1 are supported by the housing 3, for example, as shown in FIG. 11, slits are formed on the inner surface of the side plate 34 of the housing 3 in place of the guide convex portion 5. It is good also as what is provided so that the side edge part of the curved diaphragm 1 may be inserted, and the guide recessed part 15 may be provided there. That is, the guide recess 15 is slightly larger than the thickness of the curved diaphragm 1, and the curved diaphragm 1 is supported by the housing 3 via the guide recess 15 by sandwiching the side edge of the curved diaphragm 1 therebetween. It becomes.

  In FIG. 11, similarly to the guide convex portion 5, the guide concave portion 15 has arc-shaped grooves formed in a shape that draws an arc that faces obliquely upward from the front surface portion to the top surface portion of the housing 3. These are shown as being formed on the inner surfaces of the side plates 34, 34, respectively.

  By supporting the curved diaphragm 1 through the guide recess 15 in this way, the curved diaphragm 1 can vibrate relatively freely without being fixed to the housing 3, but on the other hand, the curved vibration is generated by the guide recess 15. The vibration energy of the plate 1 is not easily transmitted to the housing 3, and the energy loss is small.

Although not shown, when the curved diaphragm 1 is to be supported via the guide recess 15, the side plate 34 is provided with the guide convex portion 5 together with the guide concave portion 15, and is curved via the guide concave portion 15 and the guide convex portion 5. The side edges of the diaphragm 1 may be supported by the housing 3.
Further, the side plate 34 is provided with the guide concave portion 15 and the guide convex portion 5, and a large number of edge support members 6 are arranged on the upper surface of the guide convex portion 5 so that the side edge portion of the curved diaphragm 1 is inserted by the guide concave portion 15. The edge support member 6 may support the lower side edge portion of the curved diaphragm 1 partially by point contact.

  When the side edge of the curved diaphragm 1 is inserted into the recess and supported by the housing 3, for example, as shown in FIG. 12, a wide concave guide portion is formed on the inner surface of the side plate 34 of the housing 3. (Wide guide recess) 18 is provided, and a large number of the edge support members 6 described above are arranged on the upper surface and the lower surface in the wide guide recess 18 so that the curved diaphragm 1 is sandwiched between the edge support members 6 to perform point contact. It may be supported.

  In FIG. 12, as with the guide recess 15, the wide guide recess 18 has a wide arc-shaped concave groove formed in a shape that draws an arc that faces obliquely upward from the front surface portion to the top surface portion of the housing 3. These are shown as being formed on the inner surfaces of the left and right side plates 34, 34, respectively. In addition, 17 edge support members 6 are arranged at regular intervals downward from the upper surface in the wide arc-shaped concave groove, and 17 pieces are arranged at regular intervals upward from the lower surface in the wide arc-shaped concave groove. Shown as a thing.

  In this way, the curved diaphragm 1 vibrates relatively freely by supporting both side edges of the curved diaphragm 1 between the edge support members 6 provided in the upper and lower rows in the wide guide recess 18, The edge support member 6 makes it difficult for the vibration energy of the curved diaphragm 1 to be transmitted to the housing 3, resulting in less energy loss.

In addition, the universal speaker of the present invention is not limited to the combination of one driver unit and one curved diaphragm, but can be various combinations based on the above-described configuration.
For example, a plurality of curved diaphragms 1 may be attached to the driver unit 2 and the materials of the curved diaphragms 1 may be different from each other. That is, as shown in FIG. 13, the universal speaker 20 having a structure in which two curved diaphragms 11A and 11B having the same size but different materials are attached to the diaphragm drive unit 26 of the driver 2, respectively. It can be.

  In FIG. 13, the driver 2 is fixedly attached to the back plate 33 of the housing 3, and the two curved diaphragms 11 </ b> A and 11 </ b> B both cover the opening 39 of the housing 3 and have an edge thereof. The part is shown as being arranged so as to abut on the diaphragm driving part 26 of the driver 2 substantially at a right angle.

  According to such a universal speaker 20, the sound from the high to middle range is reproduced from the curved diaphragm 1 made of a hard material, and the sound in the lower range is reproduced from the curved diaphragm 1 made of a soft material. It can be expected that the sound from the middle range to the lower range is reproduced from the curved diaphragm 1 made of a light material, and the sound from the middle range to the lower range is reproduced from the curved diaphragm 1 made of the same heavy material.

  The universal speaker of the present invention may be configured such that a plurality of curved diaphragms 1 are attached to the driver unit 2 and the bending angles of the curved diaphragms 1 are different. That is, as shown in FIG. 14, the universal speaker 30 having a structure in which two curved diaphragms 11A and 11C, which are made of the same material but have different bending angles, are respectively attached to the diaphragm driving unit 26 of the driver 2. It can be.

  In FIG. 14, the driver 2 is fixedly attached to the bottom plate 31 of the housing 3, and the two curved diaphragms 11 </ b> A and 11 </ b> C having different bending angles cover the opening 39 of the housing 3, and The edge portion is shown as being arranged so as to contact the diaphragm driving portion 26 of the driver 2 at a substantially right angle.

  According to such a universal speaker 30, the sound from the high to middle range is reproduced from the curved diaphragm 11 </ b> C having a large bending angle, and the sound from the middle to low range is reproduced from the curved diaphragm 11 </ b> A having a small bending angle. Can be expected.

  In the universal speaker of the present invention, a plurality of curved diaphragms 1 may be attached to the driver unit 2 and the sizes of the curved diaphragms 1 may be different. That is, since the reproduction frequency band varies depending on the size of the curved diaphragm 1, as shown in FIG. 15, two curved vibrations having the same material but different sizes from the diaphragm driving unit 26 of the driver 2 are used. It can be set as the universal speaker 40 which has the structure which attached board 11A, 11D, respectively.

  In FIG. 15, the driver 2 is fixedly attached to the back plate 33 of the housing 3, and the two curved diaphragms 11 </ b> A and 11 </ b> D having different sizes cover the opening 39 of the housing 3, and The edge portion of the driver 2 is shown as being arranged so as to contact the diaphragm driving portion 26 of the driver 2 at a substantially right angle.

  Such an all-purpose speaker 40 has a reproduction frequency that can be reduced by attaching the curved diaphragm 1 having different dimensions to the same driver unit 2 when the sound reproduction area is not sufficiently expanded due to the material and bending angle of the curved diaphragm 1. The area should be expanded. Therefore, it can be expected that the sound in the high to middle range is reproduced from the curved diaphragm 11D having a small size, and the sound in the middle to low range is reproduced from the large curved diaphragm 11A.

  Further, the universal speaker of the present invention may have a plurality of driver units 2 attached to one end side of the curved diaphragm 1. That is, as shown in FIG. 16, the universal speaker 50 having a structure in which three driver units 2 are respectively attached to the curved diaphragm 1 can be obtained.

  In FIG. 16, all three drivers 2 are fixedly attached to the bottom plate 31 of the housing 3, and the curved diaphragm 1 covers the opening 39 of the housing 3, and all edge portions thereof are covered. It is shown as what was distribute | arranged so that it may contact | abut with the diaphragm drive part 26 of the driver 2 of this driver at substantially right angle.

  In such a universal speaker 50, the end surface portion of the same curved diaphragm 1 is driven by the three driver units 2, so that one driver unit 2 drives the upper limit sound energy by the plurality of driver units 2. Larger shear waves and dense waves can be generated from the curved diaphragm 1. Therefore, it can be expected to produce a clear sound with a high volume.

  Further, the universal speaker of the present invention may be configured such that the driver unit 2 is further attached to the other end side of the curved diaphragm 1. That is, as shown in FIG. 17, the first driver 12A is attached to one end edge of the curved diaphragm 1, and the second driver 12B is attached to the other end edge. The universal speaker 60 can be used. Specifically, the first driver 12A and the second driver 12B are both moving magnet type actuators, the first driver 12A and the second driver 12B are both moving coil type actuators, One of the one driver 12A and the second driver 12B may be a moving magnet type actuator, and the other may be a moving coil type actuator.

  In FIG. 17, the first driver 12A is fixedly attached to the bottom plate 31 of the housing 3 and the second driver 12B is fixedly attached to the back plate 33 of the housing 3, respectively. 3, one end edge of which is the diaphragm driver 26 of the first driver 12A, and the other edge is the diaphragm driver 26 of the second driver 12B. It is shown as being arranged to abut at a substantially right angle.

  Such a universal speaker 60 drives different end faces of the curved diaphragm 1 with different driver units 12A and 12B, respectively, so that a single driver unit generates an upper limit sound generation energy by a plurality of driver units 2 (12A and 12B). And a larger shear wave and a dense wave can be generated from the curved diaphragm 1. Therefore, it can be expected to produce a clear sound with a high volume.

  The universal speaker 60 further includes means for dividing the electric signal into several frequency bands, and inputs the divided electric signals to different driver units 12A and 12B. That is, as indicated by arrows in FIG. 17, the band of a single audio signal input to the driver unit 2 (12A, 12B) is divided into two frequency bands by an audio signal dividing device 8 such as an analog or electronic filter. To do. One of the outputs is input to the first driver 12 </ b> A, the other output is input to the second driver 12 </ b> B, and one curved diaphragm 1 is driven, so that one end side of the curved diaphragm 1 and the other It is possible to obtain shear waves and coarse waves with different reproduction bands on the end side at the same time, and obtain shear waves and coarse waves with a broad reproduction band as a whole.

  In the universal speaker of the present invention, any one of the driver units 2 may include an actuator using a piezoelectric body. The piezoelectric body is a substance having a piezoelectric effect that deforms itself in proportion to the pressure when a pressure is applied, and the actuator is a piezoelectric element that uses the piezoelectric effect to convert the applied voltage into a force. The piezoelectric element expands and contracts (vibrates) in one direction when a voltage is applied. Therefore, as shown in FIG. 18, a moving magnet type driver unit 2 is attached to one end edge of the curved diaphragm 1, and a piezoelectric element 12 is attached to the other end edge. It can be set as the universal speaker 70 which has. Specifically, one of the first driver 12A and the second driver 12B is a moving magnet type actuator, and the other is a piezoelectric body, or one of the first driver 12A and the second driver 12B. May be a moving coil type actuator, and the other may be a piezoelectric body. The piezoelectric element 12 can be made of ceramics, a polymer such as PVDF (polyvinylidene fluoride), a composite of ceramics and a polymer, or the like.

  In FIG. 18, one driver 2 is fixedly attached to the bottom plate 31 of the housing 3, and the curved diaphragm 1 covers the opening 39 of the housing 3, and one end edge thereof is one side. It is shown as what was distribute | arranged so that it may contact | abut with the diaphragm drive part 26 of the driver 2 of this driver at substantially right angle.

  The universal speaker 70 further includes an audio signal dividing device 8 that divides an electric signal into several frequency bands, and inputs the divided electric signals to different driver units 12A and 12B. ing. That is, as shown by arrows in FIG. 18, the band of a single audio signal input to the driver units 2 and 12 is divided into two frequency bands by the audio signal dividing device 8, and one of the outputs is divided into the first driver 2. And the other output is input to the second driver 12 to drive one curved diaphragm 1.

  By attaching the piezoelectric element to the edge portion of the curved diaphragm 1 in this way, changes in the piezoelectric element are efficiently transmitted to the curved diaphragm 1, and an effect is obtained particularly in reproduction in a high sound range. Therefore, the moving magnet type driver unit 2 is attached to one end edge of the curved diaphragm 1 by attaching the piezoelectric magnet 12 to the other end edge. By reproducing the mid-range to low-range sound from the curved vibration plate 1 on the side, and reproducing the sound from the high-frequency range to the mid-range from the curved vibration plate 1 to which the piezoelectric element 12 is attached, In particular, it is expected to obtain shear waves and coarse waves with a wide reproduction band.

In addition, the universal speaker of the present invention includes two driver units and two curved diaphragms, and two combinations of one curved diaphragm and one driver unit are arranged in one casing. It is good as a thing. That is, as shown in FIG. 19, the first curved diaphragm 11A having a large size is attached to the first driver unit 12A and the second curved diaphragm having the same small size as the second driver unit 12B. It can be set as the universal speaker 80 which has the structure which attached 11D.
The universal speaker 80 further includes an audio signal dividing device 8 that divides an electric signal into several frequency bands, and inputs the divided electric signals to different driver units 12A and 12B. ing.

  In FIG. 19, two drivers 12 </ b> A and 12 </ b> B are both fixedly attached to the back plate 33 of the housing 3, and the two curved diaphragms 11 </ b> A and 11 </ b> D both cover the opening 39 of the housing 3. In addition, the edge portion of the large first curved diaphragm 11A is in contact with the diaphragm driving portion 26 of the first driver unit 12A at a substantially right angle, and the edge portion of the small second curved diaphragm 11D is the second edge portion. The driver unit 12B is arranged so as to be in contact with the diaphragm driving portion 26 of the driver unit 12B substantially at right angles.

  Such a universal speaker 80 drives the end surfaces of the curved diaphragms 11A and 11D having different shapes with different driver units 12A and 12B, respectively, so that the upper limit of one driver unit and one curved diaphragm is reached. The conversion of a certain sounding energy is appropriately converted by the plurality of driver units 2 (12A, 12B) and the plurality of curved diaphragms 11A, 11D, respectively, and larger shear waves and dense waves are obtained from the respective curved diaphragms 11A, 11D. Can be generated. Therefore, it can be expected that the sound volume is high and clear according to the sound range.

Furthermore, the universal speaker of the present invention includes two driver units and two curved diaphragms, and two sets of one curved diaphragm combined with one driver unit are arranged in one casing. Any one of the driver units may include an actuator using a piezoelectric body. That is, as shown in FIG. 20, the first driver unit is a moving magnet type, the first curved diaphragm 11A having a large size is attached to the driver unit 2, and the second driver unit is a piezoelectric element. 12 and the universal speaker 90 having a structure in which the second curved diaphragm 11D having a small size with respect to the driver unit 12 is attached.
The universal speaker 90 further includes an audio signal dividing device 8 that divides an electric signal into several frequency bands, and inputs the divided electric signals to different driver units 2 and 12, respectively. ing.

  In FIG. 20, the first driver unit 2 is fixedly attached to the back plate 33 of the housing 3, and the two curved diaphragms 11A and 11D both cover the opening 39 of the housing 3, and The end edge portion of the large first curved diaphragm 11A is shown as being arranged so as to contact the diaphragm driver 26 of the first driver unit 2 substantially at right angles.

  Such an all-purpose speaker 90 drives the respective end faces of the curved diaphragms 11A and 11D having different shapes with different driver units 2 and 12, respectively, so that one driver unit and one curved diaphragm have an upper limit. The conversion of a certain sounding energy is appropriately converted by the plurality of driver units 2 and 12 and the plurality of curved diaphragms 11A and 11D, respectively, and larger shear waves and dense waves are generated from the respective curved diaphragms 11A and 11D. I can do it. Therefore, a moving magnet type driver unit 2 or the like is attached to the edge of the first curved diaphragm 11A, and the piezoelectric element 12 is attached to the edge of the second curved diaphragm 11D. From the curved diaphragm 11A on the side to which the driver unit 2 is attached, the sound in the middle to low range is reproduced, and on the curved diaphragm 11D on the side to which the piezoelectric element 12 is attached, the sound in the middle to middle range is reproduced. By doing so, it can be expected that the sound volume is high and clear according to the sound range.

  Although not shown in the drawings, in the present invention, a metal fitting for firmly fixing the driver unit 2 to a plate such as a side surface portion or a bottom surface portion of the housing 3 is provided, and the driver unit 2 is mounted after being installed at the center position of the driver unit 2. It is also possible to adjust freely within the range of xmm to the left and right and xmm to the front and back, and keep it firmly held.

Next, evaluation for confirming the effect of the universal speaker of the present invention was performed.
[Example 1]
In this embodiment, a moving magnet type driver unit is fixedly attached to a bottom plate portion in a hollow wooden casing having a guide convex portion, and a plate-like plate-like plate is formed on the driver driving portion of the driver unit. The end edge of the diaphragm was attached in contact. In addition, by bending this diaphragm along the guide convex part, a curved surface part curved to 110 ° was formed, and a universal speaker provided with a curved diaphragm arranged to cover the opening of the housing was created. . Then, an evaluation test was conducted to determine whether or not sound that can be heard by a hearing impaired person and a normal hearing person was emitted using this universal speaker.

In the evaluation test, a total of 124 people, including 31 people with hearing impairment and 193 people with normal hearing, are panelists. The audio signal output from the earphone jack of the audio player is input to the driver unit of the universal speaker of this embodiment, and released. We evaluated the impression of the sound.
The evaluation is “◎” if you can hear clearly and clearly, “○” if you can hear but feel the volume is low, “△” if you can hear and not hear, “△”, if you can hear little or no sound. It was set as “x”. The evaluation results are shown in [Table 1].
The breakdown of the hearing impaired by age was 21 in the 90s, 6 in the 80s, 3 in the 60s, and 1 in the 30s.

  From the results shown in Table 1, it can be seen that the universal speaker of the present invention can be heard well by a hearing-impaired person and a normal hearing person without inconvenience by vivid sound emission with high volume.

[Example 2]
Next, in order to confirm that it is desirable that the bending angle of the curved surface portion of the curved diaphragm is slightly larger than 90 °, in the universal speaker of Example 1, the bending angle of the curved surface portion of the curved diaphragm is set to 0. The sound that can be heard by a hearing impaired person and a hearing person in these all-purpose speakers depends on the bending angle of the curved surface portion of the curved diaphragm, and is changed to °, 45 °, 90 °, 110 °, 130 °, and 180 °. An evaluation test was conducted to see how it changed. The evaluation results are shown in [Table 2].
The number of panelists and the evaluation method were the same as in Example 1 above. In addition, the results of Example 1 were used for the evaluation when the bending angle of the curved surface portion of the curved diaphragm was 110 °.

  From the results of Table 2, in the universal speaker of the present invention, when the bending angle of the curved surface portion of the curved diaphragm is 90 ° to 130 °, the kinetic energy converted from the electrical energy of the audio signal is efficiently applied to the curved diaphragm. It is understood that the sound is emitted more clearly and the sound is higher and clearer.

[Example 3]
Next, using the same all-purpose speaker as in Example 1 above, the impression of the sound emitted individually for the presbycusis was evaluated. The subject is a 82 year old senile deaf man who uses hearing aids on a daily basis.
With the subject removing the hearing aid, the audio signal output from the earphone jack of the audio player was input to the driver unit of the universal speaker, and the sound was output.

  Moreover, when the sound signal output from the earphone jack of the TV was input to the same subject and the sound was emitted, the answer was that it was clearly audible. After that, when the universal speaker jack was pulled out from the earphone jack and the sound was emitted from the TV speaker, they answered that they could not hear at all and could not recognize human voice.

[Example 4]
Next, using the same universal speaker as in Example 1 above, the impression of the sound emitted individually for the person with organic hearing loss was evaluated. The subject is a woman in her 30s who has hearing loss due to an organic disorder from a young age.
When the sound signal output from the earphone jack of the audio player was input to the driver unit of the universal speaker and released, the answer was that it could be heard without stress in any sound range. Moreover, the subject seemed very happy and got an answer that they were excited and very hopeful.

[Example 5]
Next, using the same universal speaker as in Example 1 above, the impression of the sound emitted individually for the hereditary deafness was evaluated. The subject is a 65-year-old man with hereditary hearing loss who is born with weak hearing and has a hearing aid since he was young.
When the target person had the hearing aid removed, the voice signal output from the earphone jack of the radio was input to the universal speaker driver unit, and the sound was heard. The answer was that the announcer's voice and music could be heard clearly. Got.

1, 11 (A, B, C, D) Diaphragm, 1a one end, 1b other end, 2,12 driver unit, 3 housing, 4,14 clamping tool, 5 guide convex part, 6 edge support member, 8 sound Signal dividing means 10, 20, 30, 40, 50, 60, 70, 80, 900 universal speaker, 15 guide recess, 16 vibration damping member, 17 (17A, 17B) stopper, 18 wide guide recess, 21 yoke, 22 driver circuit, 23 voice coil, 24 pole piece, 25 magnet (permanent magnet), 26 diaphragm drive unit, 31 bottom plate, 32 front plate, 33 back plate, 34 side plate, 35 collar, 36 fixing piece, 39 opening 41, 42 Clamping mouth.

Claims (2)

A flat plate-shaped diaphragm, a driver unit that vibrates the diaphragm in response to an input electrical signal, and a hollow housing that houses the diaphragm and the driver unit,
The housing has an opening on one side,
The driver unit is in contact with an edge of the diaphragm so as to be driven in the same direction as the surface direction of the diaphragm, and is fixedly attached to the housing.
The diaphragm is arranged so as to form a curved surface portion that curves as it goes from one end side to which the driver unit is attached to the opposite other end side, and covers the opening of the housing. An edge is supported by the housing;
Both side edges of the diaphragm are supported using curved guide projections provided on the inner surfaces of the left and right side plates of the housing, respectively.
A universal speaker characterized by this. 2. The universal speaker according to claim 1, wherein a plurality of edge support members for supporting the diaphragm partially by point contact are arranged on an upper surface of the guide convex portion.

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