JP2020077925A - Loudspeaker, loudspeaker unit and diaphragm - Google Patents

Abstract

To provide a loudspeaker that uses curved diaphragm and enables both a hearing-impaired person and a normal hearer to hear sound therefrom, and can be used outdoors or in a large venue without involving increase in the thickness of a base material used as the curved diaphragm or increase in the size of a magnetic circuit of an actuator.SOLUTION: A loudspeaker 20 comprises at least: a diaphragm 1 having a curved surface portion that curves from one end side to the other end side; a plurality of driver units 2. . .2 that vibrate the diaphragm according to an input electrical signal; and a housing 3 that supports the diaphragm and the driver unit. The housing has an opening 39. The driver units are each fixedly fitted to the housings. A shape retaining member 11 is fitted to the edge portions, on one end side and the other end side, of the diaphragm, which is fixed while the end face portion of the diaphragm abuts on the driver unit. The diaphragm is arranged so as to cover the opening of the housing, and both side edges, along the bending direction, of the diaphragm are supported by the housing.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a speaker using a curved diaphragm, and more particularly, to a large-sized curved diaphragm speaker that can be heard by a hearing-impaired person and a hearing-impaired person and can be used outdoors or in a large venue.

  In recent years, the number of hearing-impaired people such as presbycusis due to aging, external hearing, middle ear, inner ear, and organic hearing loss with disorders in cochlear nerve, functional hearing loss due to stress, and the like is increasing. It is said that the number of people with hearing loss in Japan is 20 million. In the case of deafness, not only will you not be able to hear the sound, but even if you hear it, it will be difficult to clearly distinguish it, and if you do not understand the content of the conversation well, you will reply and mislead the other party, The conversation may stop when you repeatedly listen to it on the way.

  As a result, there is a phenomenon that smooth communication cannot be performed due to hearing loss, it becomes frustrating to talk unknowingly and the chances of meeting people are reduced, and people tend to stay at home without going out. It is said that there may be problems of isolation and alienation from society.

  A hearing aid is generally used as a means for reducing the inconvenience of hearing loss. Further, there is an FM transmitter that connects to an earphone jack of a television to skip the sound by an FM radio wave and receive the sound of the television by receiving the FM radio on hand when watching the television.

However, hearing aids are not so often used because they are “noisy” and “embarrassing to wear”, and they are often used without help. In addition, many hearing aids pick up noise, which may cause a lot of stress.
On the other hand, when an FM transmitter is used, it is troublesome to prepare the FM transmitter and install the FM transmitter every time a television is viewed. Further, connecting the FM transmitter to the earphone jack switches the sound output destination, and there is a problem that both the hearing impaired person and the normal hearing person cannot watch TV without any inconvenience.

  Therefore, a speaker having a hollow structure, a drive unit housed in the housing, and a curved diaphragm arranged on the surface of the housing are provided as a speaker for generating a sound that can be heard by a hearing-impaired person. The applicant has proposed a speaker configured to transmit sound to the edge portion of the curved diaphragm for sound emission (see, for example, Patent Documents 1 and 2).

  A speaker using such a curved diaphragm (hereinafter, simply referred to as "curved diaphragm speaker") is a sound output that can be heard not only by a hearing-impaired person but also by a hearing-impaired person without wearing a hearing aid. It is known to be able to do. Furthermore, it has been confirmed that the curved diaphragm speaker according to the inventions described in Patent Documents 1 and 2 can be clearly heard even at a long distance in a subsequent verification experiment.

It has been confirmed that the curved diaphragm speaker has a basic performance that can be practically used and is at a manufacturable level.
However, when the speaker is upsized so that it can be used outdoors or in a large venue, the curved diaphragm may not function as a diaphragm. That is, if the area of the curved diaphragm is simply increased, the curved diaphragm becomes thinner than the planar size, so that the curved diaphragm is weakened and bent, and the curved diaphragm connected to the actuator is bent. There is a possibility that the edge of the curved plate may be deformed or damaged, and it may be difficult to maintain the shape of the curved diaphragm itself.

Therefore, in the case of a large-sized curved diaphragm speaker, the base material used as the curved diaphragm must be thick and strong.
However, increasing the thickness of the base material as the curved diaphragm basically means increasing the weight of the diaphragm itself, and increasing the weight means increasing the driving force of the actuator. Becomes However, in order to increase the driving force of the actuator, the size of the actuator must be increased, which has a major drawback including a cost increase factor.

  In addition, power up of the drive system requires measures such as input resistance of the voice coil, which corresponds to the output capacity of the amplifier, and enlargement of the magnetic circuit for driving the voice coil, which can be done easily. Has no drawbacks. In particular, an increase in the size of the magnetic circuit has a large factor of cost increase and also affects the structure of the housing, so that the design must be redesigned or redesigned.

Japanese Patent No. 5668233 JP, 2016-140060, A

  The present invention has been made in response to the solution of the conventional requirements, and in a speaker using a curved diaphragm, increases the thickness of the base material used as the curved diaphragm and enlarges the magnetic circuit of the actuator. The present invention provides a large-sized speaker that can be heard by a hearing-impaired person and a normal-hearing person together and can be used outdoors or in a large venue.

  A speaker according to the present invention includes a diaphragm having a curved surface portion that curves from one end side to the other end side, a plurality of driver units that are driven according to an input electric signal to vibrate the diaphragm, and At least a diaphragm that supports the diaphragm and the driver unit is provided, the housing has an opening, the driver unit is fixedly attached to the housing, and the diaphragm is A shape-retaining material is attached to at least the edge portion on the one end side and / or the other end side, and the shape-retaining material is attached so as to cover at least a part of the opening of the housing. One end side and / or the other end side end surface portion is attached in a state of being in contact with each of the driver units, and both side edge portions along the bending direction are supported by the casing.

  In the speaker according to the present invention, the diaphragm is attached to each driver unit by using a vibration transmitting member that holds an edge portion on one end side and / or the other end side to which the shape maintaining material is attached. Can be done. It is desirable that such a vibration transmitting member includes a sandwiching portion arranged on each of the one surface side and the other surface side of the diaphragm, and the spacing between the sandwiching portions can be adjusted and can be separated from each other.

  Specifically, a pair of holding members each having a sandwiching portion arranged on one surface side and the other surface side of the diaphragm, an adherend member attached to the top end portion of a voice coil bobbin forming a driver unit, and a holding member. The vibration transmitting member may include a locking member that fixes the member to the adherend. That is, the vibration transmitting member is composed of a pair of holding members, an adhered member, and a locking member, and the edge portion of the diaphragm to which the shape holding member is attached is held by each holding portion of the pair of holding members. In combination with the adhered member, it is fixed by a locking member.

  Also, a holding member having a holding portion arranged on one side of the diaphragm and a holding portion arranged on the other side of the diaphragm, and a flat surface portion attached to the top end portion of the voice coil bobbin constituting the driver unit. It is also possible to make a vibration transmitting member composed of an adherend member having That is, this vibration transmitting member is composed of a holding member and an adherend member, and the edge of the diaphragm to which the shape-retaining material is attached is integrated with the holding member sandwiching portion and the flat surface of the adherend member. It is intended to be sandwiched by the sandwiching section.

  Further, in the speaker according to the present invention, the diaphragm may have a shape-retaining material attached to both side edge portions along the bending direction together with the edge portion on one end side and the edge portion on the other end side. The shape retaining material may be partially attached to the area surrounded by these edges.

  In addition, the speaker unit according to the present invention includes a diaphragm having a curved surface portion that curves from one end side to the other end side, and a plurality of driver units that are driven according to an input electric signal to vibrate the diaphragm. The vibration plate has a shape-retaining material attached to at least the edge portion on the one end side and / or the other end side, and the end surface on the one end side and / or the other end side to which the shape holding material is attached. The part is fixed while being in contact with each of the driver units. That is, in the speaker unit according to the present invention, the diaphragm is arranged so as to cover at least a part of the opening of the housing, and both side edges along the bending direction are supported by the housing. , Constitutes the above-mentioned speaker.

  Further, the diaphragm according to the present invention has a curved surface portion that curves from one end side to the other end side, and the shape maintaining material is attached to at least the edge portion on the one end side and / or the other end side. It is characterized by That is, in the diaphragm according to the present invention, the end surface portion on one end side and / or the other end side, to which the morphological holding material is attached, is fixed in a state of being in contact with the driver unit, and thus the above-described speaker unit is provided. It is what constitutes.

  In the speaker according to the present invention, the shape holding material is attached to at least one end side and / or the other end side edge portion of the diaphragm having the curved surface portion that curves from the one end side to the other end side. The end surface portions on the one end side and / or the other end side that are attached are attached in a state of being in contact with the driver unit. Therefore, in order to maintain the shape, the shape of the diaphragm itself, which is an extremely fragile thin sheet body, can be maintained, and the driver unit is brought into contact with the end surface of the diaphragm that will be bent due to the increase in size to cause vibration. However, it is possible to prevent the edge portion of the diaphragm from being deformed or damaged.

  Moreover, the speaker according to the present invention includes a plurality of driver units. Therefore, the kinetic energy converted from the electric energy of the electric signal input to each driver unit can be efficiently transmitted to the diaphragm, and the diaphragm can be multi-driven in the plane direction.

  Therefore, in a speaker using a curved diaphragm, both a hearing-impaired person and a hearing-impaired person can hear without increasing the thickness of the base material used as the curved diaphragm or increasing the size of the magnetic circuit of the actuator, and , It is possible to provide a large-sized speaker that can be used outdoors or in a large venue.

It is a front side perspective view showing a speaker concerning the present invention. It is a rear side perspective view showing a speaker concerning the present invention. It is a rear view explaining the state which attaches (A) form retention material to the diaphragm which constitutes the speaker concerning the present invention, and the rear view which shows the state after attaching (B) form retention material. It is the rear view which shows the state which provided the driver unit attachment hole in the diaphragm to which the shape maintenance material was attached, and (B) the partial enlarged view. It is a rear view which shows the other state which attached the form holding material to the diaphragm which comprises the speaker which concerns on this invention. It is a front view showing (A) another form maintenance material attached to a diaphragm which constitutes a speaker concerning the present invention, and (B) a rear view explaining the state where other form retention materials are attached to a diaphragm. It is a rear view showing the speaker unit concerning the present invention. It is a perspective view showing the state where the driver unit which constitutes the speaker concerning the present invention and the vibration transmission member (clamping tool) used for the speaker concerning the present invention were combined. It is a front view explaining the state which combines the driver unit which constitutes the speaker concerning the invention, and the vibration transmission member used for the speaker concerning the present invention. It is a front view which shows the diaphragm joint (holding member) which comprises the vibration transmission member used for the speaker which concerns on this invention. It is a bottom view showing a voice coil joint (adhered member) which constitutes a vibration transmission member used for a speaker concerning the present invention. It is a side view which shows the joint wedge (locking member) which comprises the vibration transmission member used for the speaker which concerns on this invention. It is a front center sectional view explaining the structure of the vibration transmission member used for the speaker which concerns on this invention. It is a front view which shows the diaphragm joint (holding member) which comprises the other vibration transmission member used for the speaker which concerns on this invention. It is a front view and (B) bottom view showing a voice coil joint (attached member) which constitutes other vibration transmission members used for a speaker concerning the present invention. It is a front center sectional view explaining the structure of the other vibration transmission member used for the speaker which concerns on this invention. FIG. 6 is a partially enlarged perspective view showing a state in which a driver unit is attached to an edge portion of a diaphragm that constitutes a speaker according to the present invention.

Next, an example of an embodiment of the present invention will be described.
In the present embodiment, a description will be given of a multi-driving speaker in which a plurality of driver units are attached to an edge portion on one end side and an edge portion on the other end side of the diaphragm, a speaker unit, and a diaphragm used for these. To do.
It should be noted that the embodiments described below are technically limited because they are preferable specific examples of the present invention, but the scope of the present invention is not limited to the following description. Unless it is not limited to these forms.

  First, as shown in FIGS. 1 and 2, the speaker 20 according to the present embodiment converts an electric signal into a physical vibration to generate a voice that can be heard by both a hearing-impaired person and a hearing-impaired person. In addition, it is configured by including at least the diaphragm 1, the plurality of driver units 2, ..., And the housing 3. That is, the present speaker 20 is configured by the speaker unit 10 described below being supported by the housing 3.

  The diaphragm 1 according to the present embodiment is a thin sheet that is extremely fragile for maintaining its shape, and has a curved surface that curves in an arc shape from the one end side edge 1a to the opposite other end side edge 1b. Have. That is, the diaphragm 1 is a flexible thin member whose shape is difficult to maintain with its own strength.

  The material of such a curved diaphragm (hereinafter referred to as “curved diaphragm”) 1 is not particularly limited and is preferably a lightweight material. Furthermore, the sound pressure level of high frequencies may become too high. Therefore, as the curved diaphragm 1, for example, paper such as Japanese paper or carbon paper, flexible synthetic resin such as polyimide or polyester, or the like can be used.

  Further, as shown in FIGS. 3 and 4, the curved diaphragm 1 is provided with a strip-shaped shape-maintaining material 11 attached along at least one end side edge portion 1a and the other end side edge portion 1b. ing. The shape maintaining material 11 reinforces the shape (shape) of the edges 1a and 1b of the curved diaphragm 1 so as not to be collapsed by the vibration of the driver unit 2 attached to the one edge 1a and the one edge 1b. It is a thing.

That is, when the size of the sheet member used as the speaker diaphragm increases, it must be said that it is extremely difficult to maintain the shape of the sheet member itself.
Therefore, in the present invention, the shape retaining material 11 is attached to the one end side edge portion 1a and the other end side edge portion 1b of the curved diaphragm 1 so that the strength is increased. As a result, the shape retaining member 11 can maintain the shape of the edge portion of the curved diaphragm 1 and prevent the deformation and damage of the edge portion of the curved diaphragm 1 due to the vibration of the driver unit 2.

  Further, even if the shape retaining member 11 is attached to the one end side edge portion 1 a and the other end side edge portion 1 b of the curved diaphragm 1, the vibration caused by the driver unit 2 is entirely transmitted to the curved diaphragm 1 via the shape retainer member 11. It has been passed down to. Therefore, the vibration efficiency of the driver unit 2 with respect to the curved diaphragm 1 is not reduced.

  The shape holding material 11 is not limited to the one end side edge portion 1a and the other end side edge portion 1b of the curved diaphragm 1, but may be attached at the side edge portions 1c and 1d along the bending direction of the curved diaphragm 1. .. That is, it is preferable that the shape retaining material 11 is attached to all of the outer peripheral edge portions 1a, 1b, 1c, 1d of the curved diaphragm 1.

In FIG. 3, the curved diaphragm 1 has a linear elongated strip-shaped shape-maintaining material 11A only on one end side edge portion 1a, the other end side edge portion 1b, and one surface side portions 1c and 1d along the bending direction. Are shown as installed.
Further, in FIG. 4, the curved vibration plate 1 has a vibration transmission member mounting hole 14 for mounting a vibration transmission member, which will be described later, on the one end side edge portion 1a and the other end side edge portion 1b after the shape maintaining material 11 is attached. Are shown as formed. The vibration transmitting member mounting hole 14 is formed integrally with the curved diaphragm 1 and the shape-maintaining material 11 after the shape-retaining material 11 is attached to the edge portion 1a on the one end side and the edge portion 1b on the other end side of the curved diaphragm 1. It is desirable to form.

  Further, it is desirable that the shape-retaining material 11 is arranged at a desired position where the weight of the curved diaphragm 1 is as small as possible while maintaining the shape of the curved diaphragm 1. Therefore, the curved diaphragm 1 may be partially attached to the area surrounded by the outer peripheral edge portion. That is, for example, as shown in FIG. 5, it is preferable to attach the cross-shaped or X-shaped shape maintaining member 11 to the curved diaphragm 1.

  In FIG. 5, one end side edge portion 1a and the other end side edge portion 1b of the curved diaphragm 1 and linear strips on the back surface (concave surface) side of the side edge portions 1c and 1d along the bending direction of the curved diaphragm 1 are formed. It is shown that the shape-retaining material 11A having the shape described above is attached, and that the shape-retaining material 11A in the shape of a strip having a cross shape is attached on the concave surface (back surface) side of the curved diaphragm 1.

  Further, the shape-maintaining material 11 may be attached to only one of the front surface and the back surface of the curved diaphragm 1 at each edge of the curved diaphragm 1, or both sides. good. However, if there is a possibility that the weight of the bending diaphragm 1 will be too heavy by attaching the shape holding member 11 to the bending diaphragm 1, the shape holding member 11 may be provided on only one surface of the bending diaphragm 1 if the shape holding member 11 is too heavy. It should be attached.

  Further, when the curved diaphragm 1 is used as a screen, it is preferable that the projection surface is smooth. Therefore, it is preferable to attach the form holding member 11 only to the back surface of the curved diaphragm 1 with one surface on which an image is projected as the front surface.

  As such a shape-retaining material 11, a member having a shape-retaining force that is not deformed by the vibration of the driver unit 2 and being as light as possible is preferable. Specifically, for example, lightweight balsa wood or the like, or synthetic resin such as carbon fiber reinforced resin (CFRP), polyethylene terephthalate (PET) resin, polycarbonate (PC) resin, or lightweight and tough such as titanium. It is possible to use an elongated strip-shaped member made of a metal. In particular, carbon fiber reinforced resin (CFRP) is preferable in that it is light in weight, has high strength, and has a high sound propagation speed, and polyethylene terephthalate (PET) resin is preferable in terms of cost and processing. ..

  Further, the design of the shape-retaining material 11 is not limited to the linear strip shape as shown in FIG. 3 to FIG. 5 or the cross-shaped or X-shaped strip shape as described above. The side edge may be a curved strip having a wavy shape (concavo-convex shape). It is considered that such a shape-maintaining material 11 exerts an effect in sound quality adjustment.

  In FIG. 6 (A), a shape-retaining material 11B whose long side edges are curved strips is shown. In FIG. 6 (B), one end side edge portion 1a and the other end side edge of the curved diaphragm 1 are shown. The shape retaining member 11B is shown attached to the side edge portions 1c and 1d along the bending direction of the bending diaphragm 1 together with the portion 1b.

  The curved diaphragm 1 to which the shape-retaining material 11 is attached is, for example, in a flat plate state, after the end face of the one end side edge portion 1a is brought into contact with the driver unit 2 to be fixedly connected thereto, the other end side edge portion 1b is elastically bent. The curved surface is formed by deforming with the convex surface facing outward, and the end surface of the edge portion 1b on the other end side is brought into contact with another driver unit 2 for connection and fixing. That is, a plurality of driver units 2, ... Are attached to the housing 3 in advance, and then the opening of the housing 3 is opened such that the convex surface of the curved diaphragm 1 is the front side and the concave surface is the back side. The portion 39 is covered, and thereafter, the one end side edge 1a and the other end side edge portion 1b of the curved diaphragm 1 are connected to the driver unit 2, respectively, whereby the curved diaphragm 1 is arranged in the housing 3.

  Further, the bending diaphragm 1 may be a member formed to have a curved surface portion that bends in advance, and in this case, the bending diaphragm 1 is attached with the shape-retaining material 11 with the convex surface facing outward. The end surface of the one end side edge portion 1a and the end surface of the other end side edge portion 1b of the diaphragm 1 are both brought into contact with and fixed to the driver unit 2.

  The curved diaphragm 1 preferably has a substantially rectangular shape in a plan view as illustrated, but is not limited to this, and may have an arbitrary shape such as an elliptical shape, a polygonal shape, or a gourd shape in a plan view. Is also good.

Further, the speaker unit 10 according to the present embodiment is configured by including the curved diaphragm 1 and the plurality of driver units 2 ... As described above. That is, a plurality of driver units 2 are attached to each of the one end side edge portion 1a and the other end side edge portion 1b of the curved diaphragm 1, and the same curved diaphragm 1 has a plurality of driver units 2 ... Multi-drive by 2.
As a result, one driver unit 2 can be expected to increase the upper limit of the sound energy and to produce a clear sound with a high volume.

  In FIG. 7, the shape retaining members 11 are attached to the back sides of the one end side edge portion 1a and the other end side edge portion 1b of the curved diaphragm 1, and the shape retaining members 11 and 11 each include 12 driver units 2. The speaker units 10 attached to each other are shown.

  The speaker unit 10 constitutes a speaker 20 by being supported by the housing 3. That is, as shown in FIGS. 1 and 2, in the speaker unit 10, one surface side of the curved diaphragm 1 to which the form holding material 11 is attached becomes a back surface (concave surface) so as to cover the opening 39 of the housing 3. It is shown that the speaker 20 is configured by being laid across in an arch shape.

  The driver unit 2 is an actuator that drives the bending diaphragm 1 in accordance with an input (applied) electric signal (audio signal) to vibrate. The driver unit 2 contacts the end surface portions of the one end side edge portion 1a and the other end side edge portion 1b of the curved diaphragm 1 to which the shape-retaining material 11 is attached so that the curved diaphragm 1 is driven along the surface direction. They are attached in contact with each other and apply vibration to the curved diaphragm 1.

  Here, the surface direction in which the curved diaphragm 1 is driven by the driver unit 2 is the spreading direction on the surface of the curved diaphragm 1, that is, the one end side edge portion 1a where the curved surface portion of the curved diaphragm 1 expands faces. The direction in which the other end side edge portion 1b is curved toward the other end side edge portion 1b (or the other end side edge portion 1b facing the one end side edge portion 1a). As described above, this plane direction is curved in an arc shape when the curved diaphragm 1 is viewed in a plan view.

  As such a driver unit 2, for example, an electromagnetic actuator of a moving coil system or a moving magnet system can be cited. The driver unit 2 has a high coil space factor and thus a high magnetic efficiency. Therefore, high volume and clear sound emission can be expected.

  The moving coil actuator has a large stroke when driving the curved diaphragm 1 and is advantageous in design in that a wide frequency band (tone range) can be obtained. This moving coil type actuator is composed of a voice coil and a magnetic circuit, and the voice coil is inserted and arranged in a magnetic gap formed by the magnetic circuit.

The voice coil is constructed by winding a coil wire having a desired diameter around a peripheral end of a cylindrical coil bobbin with a desired number of turns. Then, by applying an electric signal or the like to the voice coil, a vibration associated with the applied signal is generated, and the vibration is transmitted to the bending diaphragm 1 connected to the voice coil for driving.
That is, since one end of the voice coil is contained in the magnetic circuit (magnetic field) and the other end is directly connected to the bending diaphragm 1, the input electric signal moves the voice coil, and the movement causes bending vibration. It is transmitted to the board 1 and converted into acoustic energy (sound).

  The energy of the electric signal is converted into kinetic energy as reciprocating motion of the magnet (pole piece) by the driver unit 2, and the kinetic energy is passed along the surface direction of the curved diaphragm 1 through the voice coil serving as the diaphragm driving unit. It is possible to generate sound by applying vibrations.

  Further, the speaker unit 10 includes a distribution unit that distributes and outputs an electric signal, and each of the plurality of driver units 2 ... Is driven by the electric signal that is distributed and output by the distribution unit. There is. That is, the electric signals of the same signal source are distributed and output to the respective driver units 2.

  The electric signal is a signal for driving an amplifier, which is supplied from a TV, radio, audio player, personal computer, smart device such as a smartphone or tablet, etc. (not shown) according to the generated sound, and drives an ordinary amplifier. It is the same as the electrical signal for

  As described above, in the present embodiment, the end surface portion of the curved diaphragm 1 is attached in contact with the diaphragm driving portion at the tip of the driver unit 2. Since the bending diaphragm 1 is attached to the diaphragm driving portion of the driver unit 2, if the end surface portion of the bending diaphragm 1 is in contact with the diaphragm driving portion of the driver unit 2, sound is emitted even at an angle. There is no problem. However, in order to prevent the volume from decreasing, it is desirable that the end surface portion of the curved diaphragm 1 abuts the diaphragm driving portion of the driver unit 2 at a substantially right angle, and at this time, the volume becomes maximum.

  Further, as a means for attaching the driver unit 2 and the curved diaphragm 1 so as to be in contact with each other at a substantially right angle, for example, as shown in FIGS. 8 and 9, a clamping tool (hereinafter referred to as “vibration transmitting member”). 4) can be attached. The vibration transmitting member 4 sandwiches the one end side edge portion 1a and the other end side edge portion 1b of the curved diaphragm 1 to which the shape maintaining material 11 is attached, and the end surface of the curved diaphragm 1 contacts the driver unit 2. It is to be installed in the state.

  That is, the vibration transmitting member 4 has a structure including a sandwiching portion sandwiching the one surface side and the other surface side of the curved diaphragm 1, and the sandwiching portion sandwiches the vicinity of the edge portion of the curved diaphragm 1 from the driver unit 2. Is efficiently transmitted to the curved diaphragm 1. Further, the vibration transmitting member 4 has a structure capable of adjusting the interval (that is, the interval between the sandwiching portions) that sandwiches the vicinity of the edge portion of the curved diaphragm 1.

  Such a vibration transmitting member 4 includes, for example, as shown in FIGS. 10 to 12, a holding member (hereinafter, referred to as “vibration plate joint”) 41 and an adherend member (hereinafter, “voice coil joint”). 42) and a locking member (hereinafter, referred to as “joint wedge”) 43. The vibration transmitting member 4A can be configured.

The diaphragm joint 41 is a pair of plate-shaped members attached to the edge of the curved diaphragm 1, and as shown in FIG. 10, a sandwiching portion 411 sandwiching the edge of the curved diaphragm 1 and the sandwiching portion 411. And a connecting portion 412 extending from a part of the.
The holding portions 411 are arranged on the one surface side and the other surface side of the edge portion of the curved diaphragm 1, respectively. That is, even when the thickness of the curved diaphragm 1 is different, the tightening degree can be adjusted.
Further, the connecting portion 412 is provided in a convex shape so as to project to the side opposite to the curved diaphragm 1 sandwiched by the sandwiching portion 411, and has a hole portion 413 for inserting the joint wedge 43 near the center thereof. There is.

  It is desirable that the diaphragm joint 41 be made of a heat-resistant resin such as carbon, which is lighter in weight than metal, and that the holding portion 411 and the connecting portion 412 be integrally formed. Specifically, for example, a pulp generally referred to as a bake plate, or a plate-shaped member obtained by impregnating a plain weave fiber with a phenolic resin, or a glass epoxy plate with an epoxy resin added to a glass fiber. It can be manufactured by a plate-shaped member that is soaked in and heat-treated.

  In FIG. 10, the diaphragm joint 41 has a horizontally long, vertically and short T shape in which a connecting portion 412 extends at the lower end near the center of the holding portion 411, and three screw holes 414 arranged at equal intervals in the holding portion 411. And a circular hole 413 in the connecting portion 412.

  That is, in the present embodiment, as shown in FIG. 4, the driver unit 2 is attached via the vibration transmitting member attachment holes 14 provided in the one end side edge portion 1a and the other end side edge portion 1b of the curved diaphragm 1. It has become a thing. Therefore, the screw hole 414 provided in the holding portion 411 of the vibration plate joint 41 corresponds in size and position to the vibration transmission member mounting hole 14.

  The voice coil joint 42 is a lid-shaped member that is attached to the top end of the voice coil bobbin 21 that constitutes the driver unit 2, and is a plane surface that covers the top end opening of the voice coil bobbin (the tip side) 21 as shown in FIG. A portion 421 and an opening portion 422 through which the connecting portion 412 of the holding portion 41 can be inserted are provided in the central portion of the plane portion 421.

  In addition, the flat surface portion 421 is provided with a step portion 423 by forming a projecting portion having a slightly smaller diameter on the other surface side opposite to the one surface where the connecting portion 412 of the diaphragm joint 41 is inserted. There is. The step portion 423 functions as a guide that allows the flat surface portion 421 to be easily attached to the top end portion of the voice coil bobbin 21, and is fixed to the top end portion of the voice coil bobbin 21 by applying an adhesive to the step portion 423. It will be one.

Therefore, the diameter of the plane portion 421 of the voice coil joint 42 is substantially equal to the outer diameter of the top end portion of the voice coil bobbin 21 to be attached, and the diameter of the step portion 423 is substantially equal to (or slightly smaller than) the inner diameter of the top end portion of the voice coil bobbin 21. ing.
Like the diaphragm joint 41, the voice coil joint 42 is preferably made of wood or synthetic resin, which is lighter than metal, and can be formed of, for example, glass epoxy resin.

When the driver unit 2 is of the moving magnet type, the diaphragm drive section has the same function as the voice coil joint 42.
In FIG. 11, the voice coil joint 42 is shown as having a slender rectangular opening 422 in the center of a disk-shaped flat portion 421 and having a small-diameter step portion 423 on the peripheral edge.

  The joint wedge 43 is a rod-shaped body that fixes the diaphragm joint 41 to the voice coil joint 42, and as shown in FIG. 12, an introduction area α that allows the diaphragm joint 41 to be inserted into the hole 413, It has a locking region β that suppresses insertion into the hole 413. For this locking portion β, it is preferable to use a wooden rod or a synthetic resin rod having elasticity that is deformable in the radial direction.

  In FIG. 12, the joint wedge 43 is shown as an inversely tapered cylindrical body whose diameter gradually increases from one end side to the other end side. Specifically, the diameter d1 on one end side of the joint wedge 43 is smaller than the diameter of the hole portion 413 of the moving plate joint 41, and the diameter d2 on the other end side is larger than the diameter of the hole portion 413.

The vibration transmission member 4A including the vibration plate joint 41, the voice coil joint 42, and the joint wedge 43 is assembled as shown in FIG.
First, the one end side edge portion 1a and the other end side edge portion 1b of the curved diaphragm 1 are sandwiched by the sandwiching portion 411 of the diaphragm joint 41, and the joint screw is inserted into the screw hole 414 through the vibration transmitting member mounting hole 14, The diaphragm joint 41 is fixed to the curved diaphragm 1 by tightening.

Next, the connecting portion 412 of the diaphragm joint 41 is inserted into the opening 422 of the voice coil joint 42, and the hole provided in the connecting portion 412 of the diaphragm joint 41 on the back side of the flat surface portion 421 of the voice coil joint 42. The introduction region α portion is inserted into the inside of the joint 413 from one end side of the joint wedge 43 having a smaller diameter and is attached.
As a result, the diaphragm joint 41 and the voice coil joint 42 can be fixed so as not to loosen.
The voice coil joint 42 is subsequently attached to the top end of the voice coil bobbin 21 that constitutes the driver unit 2.

  The vibration transmitting member 4 is, for example, as shown in FIGS. 13 to 15, a vibration transmitting member including a diaphragm joint (holding member) 44 and a voice coil joint (adhered member) 45. It may be 4B.

The diaphragm joint 44 is a plate-shaped member that is attached to one end of the curved diaphragm 1, and as shown in FIG. 14, has a holding portion 441 that is arranged on one surface side of the edge of the curved diaphragm 1. Have.
The diaphragm joint 44 is preferably made of a heat-resistant resin such as carbon, which is lighter in weight than metal. Specifically, for example, pulp commonly referred to as a bake plate, or a plate-shaped member obtained by impregnating plain weave fibers with a phenolic resin, or glass fiber called a glass epoxy plate with an epoxy resin is used. It can be manufactured by a plate-shaped member that has been soaked in and heat-treated.

  In FIG. 14, the diaphragm joint 44 is shown as including an elongated rectangular holding portion 441 and three screw holes 444 arranged at equal intervals in the holding portion 441. The screw hole 444 provided in the holding portion 441 of the vibration plate joint 44 also corresponds in size and position to the vibration transmission member mounting hole 14.

  The voice coil joint 45 is a lid-like member attached to the top end of the voice coil bobbin 21 that constitutes the driver unit 2, and as shown in FIG. 15, a plane that covers the top end opening of the voice coil bobbin (the front end side thereof) 21. A portion 451 and a plate-shaped holding portion 452 disposed on the other surface side of the curved diaphragm 1 are provided in the vicinity of the center of the surface of the flat portion 451. That is, in the voice coil joint 45, the flat surface portion 451 and the holding portion 452 are integrated.

  The flat surface portion 451 is provided with a step portion 453 by forming a protruding portion having a slightly smaller diameter on the other surface (back surface) side opposite to the one surface (front surface) side where the sandwiching portion 452 is provided. The step portion 453 functions as a guide that enables the flat surface portion 451 to be easily attached to the top end portion of the voice coil bobbin 21, and is fixed to the top end portion of the voice coil bobbin 21 by applying an adhesive to the step portion 453. It will be one.

  Therefore, the diameter of the flat surface portion 451 of the voice coil joint 45 is substantially equal to the outer diameter of the top end portion of the voice coil bobbin 21 to be attached, and the diameter of the step portion 453 is substantially equal to (or slightly smaller than) the inner diameter of the top end portion of the voice coil bobbin 21. ing.

  The sandwiching portion 452 is arranged on the other surface side of the edge portion of the curved diaphragm 1 so as to be paired with the sandwiching portion 441 in the diaphragm joint 44. That is, even when the thickness of the curved diaphragm 1 is different, the tightening degree can be adjusted. Like the holding portion 441 of the diaphragm joint 44, the holding portion 452 includes three screw holes 454 arranged at equal intervals. The screw hole 454 provided in the holding portion 452 of the voice coil joint 45 also corresponds in size and position to the vibration transmitting member mounting hole 14.

Like the diaphragm joint 44, the voice coil joint 45 is preferably made of wood or synthetic resin, which is lighter than metal, and can be formed of glass epoxy resin, for example.
When the driver unit 2 is of the moving magnet type, the diaphragm drive section has the same function as the voice coil joint 45.

  In FIG. 15, the voice coil joint 45 is shown as having a narrow rectangular holding portion 452 at the center of the surface of a disk-shaped flat portion 451 and having a small-diameter step portion 453 at the peripheral edge of the back surface.

The vibration transmitting member 4B composed of the vibration plate joint 44 and the voice coil joint 45 is assembled as shown in FIG.
First, the voice coil joint 45 is attached to the top end of the voice coil bobbin 21 that constitutes the driver unit 2.

Next, the one end side edge portion 1a and the other end side edge portion 1b of the curved diaphragm 1 are sandwiched by the sandwiching portion 441 of the diaphragm joint 44 and the sandwiching portion 452 of the voice coil joint 45. That is, the one end side edge portion 1a and the other end side edge portion 1b of the curved diaphragm 1 are applied to the sandwiching portion 452 of the voice coil joint 45, and the sandwiching portion 441 of the diaphragm joint 44 is arranged on the edge portion 1a and the other end side edge portion 1b of the curved diaphragm 1. To do.
Then, the joint screw is inserted into the screw hole 444 of the vibration plate joint 44 and the screw hole 454 of the voice coil joint 45 through the vibration transmission member mounting hole 14 and tightened, whereby the vibration plate joint 44 is attached to the curved vibration plate 1. The voice coil joint 45 can be fixed.

  If the curved diaphragm 1 is held by using the vibration transmitting member 4B including the voice coil joint 45 in which the flat surface portion 451 and the sandwiching portion 452 are integrated as described above, the sound pressure is improved by reducing the weight and the number of assembling steps is increased. There is a merit such as a significant reduction. That is, in the case of multi-driving using a plurality of driver units 2, ..., The number of assembling steps for holding the curved diaphragm 1 by the vibration transmitting member 4B is significantly reduced.

  In addition, by using the vibration transmission member 4 (4A, 4B) having a structure capable of adjusting the interval between which the curved diaphragm 1 is sandwiched, by adjusting the tightening degree even when the thickness of the curved diaphragm 1 is different, It can be held with appropriate force and securely. In addition, transmission loss at the connecting portion between the diaphragm drive unit and the curved diaphragm 1 is prevented, and even during long-term use, looseness etc. does not occur between the diaphragm drive unit and the curved diaphragm 1, and the initial energy transfer. The efficiency can be sustained.

  The housing 3 is a structure that supports the diaphragm 1 and the driver unit 2, and is a planar frame having an opening 39 whose one surface side and the other surface side are open. That is, the housing 3 constitutes the present speaker 20 by supporting the above-mentioned speaker unit 10.

  In the present embodiment, the housing 3 is a planar rectangular frame body, and when the convex surface side of the curved diaphragm 1 is viewed from the front, the right frame 3R is arranged on the right side and the left frame 3R is arranged on the left side. It is composed of a left frame 3L, an upper frame 3U arranged above, and a lower frame 3D arranged below, and includes a right frame 3R, a left frame 3L, an upper frame 3U, and a lower frame 3D. There is an opening 39 inside surrounded by.

  Further, the bending diaphragm 1 is arranged so as to cover at least a part of the opening 39 of the housing 3, and the side edges 1c and 1d along the bending direction are supported by the housing 3. ing. That is, the curved diaphragm 1 is held by the vibration transmitting member 4 attached to the diaphragm driving unit (voice coil bobbin) 21 of the driver unit 2, and the curved diaphragm 1 covers the opening 39 of the housing 3. It will be arranged in an arch shape.

  Here, the side edge portions 1c and 1d of the curved diaphragm 1 refer to the remaining edge portions of the curved diaphragm 1 excluding the one end side edge portion 1a and the other end side edge portion 1b. It refers to two opposing edge portions located along the direction from the side edge portion 1a to the other end side edge portion 1b.

  The speaker unit 20 supported by the casing 3 has the driver unit 2 fixedly attached to the casing 3. That is, the driver unit 2 receives a reaction due to the driving of the magnet when the bending diaphragm 1 is driven, but by fixing the driver unit 2 to the housing 3, the sound due to the reaction of the bending diaphragm 1 is desired. It becomes possible to adjust to a preferable sound.

  The housing 3 is not limited to the planar frame structure shown in FIGS. 1 and 2, but may be a three-dimensional hollow body structure having an opening only on one surface side although not shown. When the driver unit 2 is attached to the housing having such a hollow body structure, the driver unit 2 receives a reaction due to the driving of the magnet when the bending diaphragm 1 is driven. By being fixedly mounted on the housing, it is possible to adjust the sound produced by the reaction of the curved diaphragm 1 to a desired and desired sound. Specifically, for example, it is possible to cause the housing having a hollow body structure to sound appropriately and to slightly increase the sound pressure in a desired band.

  Further, in the present speaker 20, as shown in FIGS. 1, 2 and 17, the side edge portions 1c and 1d of the curved diaphragm 1 may be supported by the guide portion 7. That is, when the bending diaphragm 1 is vibrated by the driver unit 2, the amplitude width of the bending diaphragm 1 becomes extremely large. Therefore, the bending shape of the bending diaphragm 1 collapses and the housing 3 is touched, and an abnormal (blipping) noise is generated. It may occur.

  Therefore, both side edges 1c and 1d of the bending diaphragm 1 are guided to the guide portion 7 so that the vibration bending diaphragm 1 does not come into contact with the housing 3 even when vibrated by the driver unit 2 and the amplitude thereof is maintained while maintaining a desired curved shape. It is possible to hold it and prevent the generation of abnormal sound.

  In addition, since the side edge portions 1c and 1d of the curved diaphragm 1 are supported by the housing 3 by the guide portion 7, the curved diaphragm 1 is not affected by an external force or the like and the energy transmission efficiency is reduced. It is possible to reduce the possibility that the bending vibration plate 1 will occur and to easily dispose the curved diaphragm 1 in the housing 3.

  The guide portion 7 holds the curved diaphragm 1 while providing a desired gap between the side edge portions 1c and 1d of the curved diaphragm 1 and the upper frame 3U and the lower frame 3D of the housing 3. .. By holding the curved diaphragm 1 by the guide portion 7 in this manner, the curved diaphragm 1 freely vibrates, but on the other hand, the curved diaphragm 1 can be vibrated while maintaining a desired curved shape.

  Further, it is desirable that the guide portion 7 is provided with a vibration buffering member 17 that functions to prevent generation of abnormal noise due to contact between the curved diaphragm 1 and the guide portion 7. As the vibration damping member 17, a material that is soft and does not easily transmit vibration can be applied, and examples thereof include a material having high elasticity such as urethane foam resin, rubber, and non-woven fabric.

  1, FIG. 2 and FIG. 17, the side edge portions 11c and 11d of the bay swing plate 1 are shown as being supported by the upper frame 3U and the lower frame 3D of the housing 3. That is, the side edges 11c and 11d on the convex surface side of the bay oscillatory plate 1 are supported by the guide portion 7 on the front side via the vibration damping member 17, and the side edge portions on the concave surface side of the bay oscillatory plate 1 are supported. 11c and 11d are supported by the guide portion 7 on the back side via the vibration damping member 17.

If the side edge portions 1c and 1d of the curved diaphragm 1 are entirely held by the guide portion 7, the vibration by the driver unit 2 is suppressed, the reproduction capability on the low frequency side is reduced, and clear sound emission is achieved. It becomes impossible to do. Therefore, it is desirable that a part of the side edge portions 1c and 1d of the curved diaphragm 1 be held by the diaphragm pressing member 15 to facilitate obtaining the sound pressure in the low range.
Further, the guide portion 7 may be one in which a convex portion is formed on the upper frame 3U and the lower frame 3D of the housing 3, or one in which a concave portion is formed on the upper frame 3U and the lower frame 3D of the housing 3. ..

  In the present speaker 20 configured as described above, even if the curved diaphragm 1 is a thin sheet body that is extremely fragile for maintaining its shape and is bent by increasing its size, the shape is formed at the edge thereof. By attaching the holding member 11, even if the driver unit 2 vibrates the curved diaphragm 1, the edge of the curved diaphragm 1 is prevented from being deformed or damaged, and both the hearing-impaired person and the hearing-impaired person can hear it. It can emit audible barrier-free sound waves.

DESCRIPTION OF SYMBOLS 1 Curved diaphragm, 1a One end side edge, 1b Other end side edge, 1c, 1d Side edge, 2 Driver unit, 3 Case, 3D lower frame, 3L left frame, 3R right frame, 3U upper frame, 4 Vibration transmitting member (clamping tool), 7 guide portion, 10 speaker unit, 11 (11A, 11B) shape holding material, 14 vibration transmitting member mounting hole, 17 vibration absorbing member, 20 speaker, 21 voice coil bobbin, 39 opening portion, 41 , 44 Vibration plate joint (holding member), 42, 45 Voice coil joint (adhered member), 43 Joint wedge (locking member), 411, 441, 452 Holding part, 412 connection part, 413 hole part, 414, 444 , 454 screw holes, 421, 451 plane parts, 422 openings, 423, 453 step parts.

Claims (9)

A diaphragm having a curved surface portion that curves from one end side to the other end side,
A plurality of driver units that are driven according to an input electric signal to vibrate the diaphragm,
A casing that supports the diaphragm and the driver unit,
At least
The housing has an opening,
The driver unit is fixedly attached to the housing,
A shape-retaining material is attached to at least the edge portion on the one end side and / or the other end side of the diaphragm, and the diaphragm is arranged so as to cover at least a part of the opening portion of the housing, and the shape-retaining member is retained. The end surface portion on one end side and / or the other end side to which the material is attached is attached in a state of being in contact with each of the driver units, and both side edge portions along the bending direction are supported by the casing,
A speaker characterized by that.   The said diaphragm is attached to each said driver unit using the vibration transmission member which clamps the edge part of the one end side and / or the other end side to which the said shape maintenance material was attached. The speaker according to 1.   The vibration transmitting member includes a sandwiching portion arranged on each of the one surface side and the other surface side of the diaphragm, and an interval between the sandwiching portions can be adjusted and can be separated from each other. The speaker according to Item 2.   The vibration transmitting member includes a pair of holding members each having a sandwiching portion disposed on one surface side and the other surface side of the diaphragm, and an adherend member attached to a top end portion of a voice coil bobbin constituting the driver unit. The speaker according to claim 3, further comprising: a locking member that fixes the holding member to the adherend member.   The vibration transmitting member includes a holding member including a holding portion arranged on one surface side of the diaphragm, and a holding portion arranged on the other surface side of the diaphragm, and a voice coil bobbin constituting the driver unit. 4. The speaker according to claim 3, further comprising: an adherend member having a flat surface portion attached to the top end portion.   The speaker according to any one of claims 1 to 5, wherein a shape retention material is attached to the both side edges of the diaphragm.   The speaker according to any one of claims 1 to 6, wherein the diaphragm has a shape retaining material partially attached to a region surrounded by the edge portion. A diaphragm having a curved surface portion that curves from one end side to the other end side,
A plurality of driver units that are driven according to an input electric signal to vibrate the diaphragm,
Equipped with
In the diaphragm, a shape-retaining material is attached to at least the edge portion on the one end side and / or the other end side, and the end surface portion on the one end side and / or the other end side to which the form retaining material is attached is the above-mentioned each Fixed in contact with the driver unit,
A speaker unit characterized by the above. It has a curved surface portion that curves from one end side to the other end side, and a form retention material is attached to at least the edge portion on the one end side and / or the other end side,
A diaphragm characterized in that.

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