JP2020014069A - Speaker curved diaphragm - Google Patents

Abstract

To provide a high-performance and high-quality curved diaphragm speaker system that has sufficient performance for hearing-impaired and hearing people.SOLUTION: A speaker 10 according to the present invention accommodates at least two speaker units in a housing 5 having a hollow structure with one open side. a first speaker unit 1 includes a curved diaphragm 11 having a curved surface portion curved from one end side toward the other end side, and a driver unit 12 that vibrates the curved diaphragm according to an input electric signal. Further, the curved diaphragm of the first speaker unit is arranged such that the convex surface faces outward so as to cover one surface of the housing, and the end surface of one end abuts on the driver unit and is fixed. The other end side is connected to the housing and has an opening 111. A second speaker unit 2 is arranged on the concave surface side of the curved diaphragm such that sound can be emitted through the opening of the curved diaphragm of the first speaker unit.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a loudspeaker using a curved diaphragm, and more particularly, to a higher-performance composite curved type in which a hearing-impaired person can hear with a normal hearing person without putting on a hearing aid, and a reproduction frequency band is expanded. The present invention relates to a diaphragm speaker system.

  In recent years, the number of deaf people such as senile deafness caused by aging, organic deafness having impairment in the outer ear, middle ear, inner ear, cochlear nerve, functional hearing loss caused by stress, etc. The number of hearing impaired people in the country is said to be 20 million. In the case of hearing loss, not only does the sound become inaudible, but it becomes difficult to clearly distinguish even the sound that has been heard. For this reason, there is a case where a reply is given when the content of the conversation is not well understood to give a misunderstanding to the other party, or the conversation does not play due to repeated reflections on the way.

  Also, due to hearing loss, smooth communication can not be done, it is difficult to talk without knowing it, the chance to meet with people decreases, and the phenomenon that you tend to stay at home without going out occurs. It is said that the problem of isolation and alienation from society may occur.

  As means for reducing such inconvenience of hearing loss, there is generally a use of a hearing aid. When watching a television, there is an FM transmitter that connects to an earphone jack of the television to emit sound by FM radio waves, receives the sound by an FM radio on hand, and acquires the sound of the television.

However, hearing aids are not used so often because they are bothersome and embarrassing to wear, and are often used reluctantly. In addition, many hearing aids also pick up noise, and in some cases, the stress may be large.
On the other hand, when an FM transmitter is used, there is an inconvenience that the FM transmitter must be prepared and the FM transmitter must be installed every time a television is viewed. Also, connecting the FM transmitter to the earphone jack switches the output destination of the sound, so that there is a problem that both the hearing-impaired and the hearing-impaired cannot watch television without difficulty.

  Therefore, a speaker having a hollow structure, a drive unit housed in the housing, and a curved diaphragm disposed on the surface of the housing are provided as speakers that generate sound that can be heard by a hearing-impaired person. The applicant has proposed a speaker that transmits vibration of a drive unit to an edge (surface) of a curved diaphragm to emit sound (for example, see Patent Documents 1 and 2).

A speaker using such a curved diaphragm (hereinafter, simply referred to as a "curved diaphragm speaker") can be heard by a hearing-impaired person without wearing a hearing aid, and can be heard by a hearing-impaired person without discomfort. is there.
Moreover, it has been confirmed in the subsequent demonstration experiments that the curved diaphragm speakers according to the inventions described in Patent Documents 1 and 2 can be clearly heard not only near but also far. That is, there is no sound cracking as when the volume is excessively increased, and the user can hear the sound without being too noisy even when near.

  This curved diaphragm speaker has a basic performance at a level that can withstand practical use and has been confirmed to be at a manufacturable level. However, the reproduction frequency band is expanded, especially a low sound band (hereinafter, referred to as 400 to 500 Hz or less). There is a demand for improved sound quality with improved reproduction performance in “low range”.

  Here, the curved diaphragm speaker is a method of driving a curved diaphragm with a moving coil, a so-called voice coil, to generate sound. In order to increase the reproduction capability on the low frequency side in this method, it is necessary to increase the amplitude (movement) of the voice coil corresponding to the capability, and a diaphragm, a structure, and a power up corresponding to the increase.

  However, if the amplitude of the voice coil is forcibly increased in order to increase the reproduction capability on the low frequency side, the curved diaphragm itself emits an abnormal sound. Therefore, in order to perform low-frequency reproduction equivalent to that of a conventional speaker, the area must be enlarged, for example, by increasing the length of the curved diaphragm, and the dimensions are not practical. Become.

  Therefore, in order to increase the reproduction capability on the low frequency side, a dynamic speaker unit having a cone-shaped diaphragm is further mounted on a housing in which the curved diaphragm speaker unit is mounted, and both speaker units are driven by driving both the speaker units. It is possible to emit sound. As a result, the sound quality of the curved diaphragm, which makes it difficult for the low-frequency side to come out, is corrected by sound emission by the cone-shaped diaphragm, and a composite full-range speaker using the curved diaphragm and the cone-shaped diaphragm can be obtained.

  However, in such a composite speaker system, although a housing for mounting the speaker unit can be shared, two speaker units (a curved diaphragm speaker unit and a dynamic speaker unit) corresponding to a reproduction frequency band are used. If an attempt is made to efficiently mount the unit in a small installation area, the directions of sound emission will be different from each other, and a sufficient sense of sound pressure will not be obtained in any of the speaker units.

  In addition, in order to secure a preferable sound pressure feeling emitted from the two speakers, it is attempted to mount each speaker unit to the housing so that the sound emission directions of the curved diaphragm and the cone-shaped diaphragm are the same. Then, a larger installation area is required, and the casing becomes huge.

Japanese Patent No. 5668233 JP-A-2006-140060

  The present invention has been made in view of the above circumstances, and in a composite speaker system using a curved diaphragm, the sound quality is improved by expanding the reproduction frequency band, and the housing is not enlarged. Another object of the present invention is to provide a speaker having a preferable sound pressure feeling.

  A speaker according to the present invention includes: a housing having a hollow structure with one open side; and a plurality of speaker units housed in the housing, wherein the first speaker unit is opposed from one end. A diaphragm having a curved surface curved toward an end side; and a driver unit configured to vibrate the diaphragm in response to an input electric signal, wherein the diaphragm is an open surface of the housing. The convex side is arranged to face outward so as to cover, the one end side is in contact with and fixed to the driver unit, the other end side is connected to the housing, and the convex side and the concave side The driver unit is fixedly attached to the housing, and the second speaker unit is released through the opening of the diaphragm of the first speaker unit. To allow the fixed to the housing at a concave side of the diaphragm, the essential being attached to the housing.

  Further, the speaker according to the present invention has a flat diaphragm, a driver unit that vibrates the diaphragm according to an input electric signal, and a housing having a hollow structure that houses the diaphragm and the driver unit. A housing, the housing has an opening on one surface, and the driver unit contacts an end surface on one end side of the diaphragm so as to be driven in the same direction as the surface direction of the diaphragm. Touching, and fixedly attached to the housing, the diaphragm forms a curved surface portion that curves from one end side to which the driver unit is attached to the other end side facing the driver unit, In a speaker arranged so as to cover an opening, a second driver housed in the housing together with a first driver unit including the diaphragm and the driver unit. Further comprising a unit, wherein the first driver unit has an opening that penetrates the convex side and the concave side in the diaphragm arranged with the convex side facing outward, and the second driver unit includes: Basically, it is arranged on the concave side of the diaphragm so that sound can be emitted through the opening of the diaphragm of the first speaker unit, and is fixedly attached to the housing. It can be rephrased as having a characteristic.

In the above speaker, the diaphragm of the first speaker unit only needs to be disposed so as to cover at least a part of the open surface of the housing, and is disposed so as to cover the entire surface. May be.
In the above speaker, the second speaker unit is disposed with a gap from the diaphragm of the first speaker unit. That is, they are arranged so as not to hinder the vibration of the respective diaphragms in the respective speaker units.

  Further, in the above speaker, the second speaker unit only needs to reproduce a frequency band different from that of the first speaker unit. Speaker unit provided with a cone-shaped diaphragm used as a full range for loudspeakers, or a speaker unit provided with a dome-shaped diaphragm used as a woofer for low frequencies. Further, a speaker unit including a planar diaphragm or a speaker unit including a diaphragm using a piezoelectric element may be used.

  That is, the reproduction frequency band of the curved diaphragm of the first speaker unit changes depending on the material, shape, size, output of the driver unit, and the like of the diaphragm used for the first speaker unit. Therefore, as described in the related art (paragraph [0008]), especially when sound quality improvement with improved reproduction performance in a low frequency range of 400 to 500 Hz or less is required, low sound quality is improved together with the first speaker unit including the curved diaphragm. It is desirable to provide a second speaker unit that can increase the reproduction capability on the area side.

In the above-mentioned speaker, it is preferable that a closing member is disposed in a gap defined by the concave side of the diaphragm in the first speaker unit and the outer peripheral portion on the sound emission side of the second speaker unit.
The closing member may be attached to the periphery of the opening on the concave side of the diaphragm of the first speaker unit, or may be disposed so as to penetrate the opening of the diaphragm of the first speaker unit. It is good.

In the above-mentioned speaker, it is preferable that the diaphragm of the first speaker unit has both side edges along the bending direction supported by the housing. Specifically, for example, a guide portion may be provided on a side surface portion of the housing and supported by the guide portion. The guide portion may have a side surface portion of the housing formed in a convex shape, or may have a side surface portion of the housing formed in a concave shape.
Since the side edges of the diaphragm are supported by the housing in this manner, the diaphragm can be easily arranged without being affected by external force or the like.

  Further, the speaker according to the present invention further includes a third speaker unit, which is fixed to the housing so that sound can be emitted through another surface except one open surface of the housing. May be attached.

  The speaker according to the present invention accommodates, in a housing, a first speaker unit having a curved diaphragm and a second speaker unit reproducing a frequency band different from that of the first speaker unit. Therefore, by reproducing the reproduction band beyond the first speaker unit by the second speaker unit, it is possible to reproduce a wider band of sound, and a sound that is extremely effective for a hearing-impaired person and a sound for a hearing-impaired person. A high-performance and high-quality speaker system in which sound is mixed and which can be heard by both hearing-impaired and hearing-impaired persons can be obtained.

  Moreover, an opening is provided in the curved diaphragm in the first speaker unit, and the second speaker unit is arranged on the concave side of the curved diaphragm so that sound can be emitted through the opening. ing. Therefore, the first speaker unit and the second speaker unit emit sound in the same direction, sound pressure can be efficiently obtained, and a hybrid speaker system with a small installation area can be provided.

  Therefore, in a composite speaker system using a curved diaphragm, it is possible to provide a speaker in which sound quality is improved by expanding a reproduction frequency band, and a preferable sound pressure feeling is secured without increasing the size of a housing. it can.

It is a front perspective view showing the speaker concerning the present invention. FIG. 2 is a cross-sectional view illustrating a structure of a speaker according to the present invention. It is a top view showing an example of (A) a diaphragm used for the 1st speaker unit concerning the present invention, and (B) another example of a diaphragm. It is a perspective view which shows the support member used when attaching the 2nd speaker unit which concerns on this invention to a housing | casing.

Hereinafter, an example of an embodiment of a speaker system according to the present invention will be described with reference to the drawings.
The present invention relates to a speaker system in which a plurality of speaker units are housed in a housing. In the present embodiment, two speaker units are housed in the housing to facilitate understanding of the present invention. The speaker will be described.

  Although the embodiments described below are preferred specific examples of the present invention, they are technically variously limited. However, the scope of the present invention is described in the following description as being particularly limited. It is not limited to these forms unless otherwise noted.

  As shown in FIGS. 1 and 2, the speaker 10 according to the present embodiment includes a first speaker unit 1, a second speaker unit 2, and the first speaker unit 1 and the second speaker unit 2. And a housing 5 for accommodating them. That is, the housing 5 has a hollow structure with one surface opened, and houses the first speaker unit 1 and the second speaker unit 2.

  The first speaker unit 1 includes a diaphragm (hereinafter, referred to as a “curved diaphragm”) 11 having a curved surface portion that curves from one end to the other end, and a driver unit that drives the curved diaphragm 11. 12 at least.

  The curved diaphragm 11 is a flexible sheet-like member capable of forming a curved surface portion, and is connected and fixed by abutting an end surface of one end side 11a to the driver unit 3. The curved vibration plate 11 forms a curved surface portion by, for example, contacting and fixing the end surface of one end 11a to the driver unit 3 in an upright flat state, and then elastically bending and deforming the other end 11b. The other end 11b is connected to the housing 5 with the deformed curved convex surface facing outward. That is, the convex side faces outward so as to cover one open surface (opening) of the housing 5.

  The curved diaphragm 11 may be a member formed to have a curved surface portion that bends in advance. In this case, after connecting one end 11a to the driver unit 3, the convex side faces outward and the concave side faces The other end 11 b is connected to the housing 5 so that the side faces the inside of the housing 5.

The curved diaphragm 11 has both side edges 11 c and 11 d along the bending direction supported by the housing 5. That is, the side edges 11c and 11d are the remaining side edges of the peripheral edge of the curved diaphragm 11 excluding the one end 11a and the other end 11b.
1 and 2, both side edges 11c and 11d of the curved diaphragm 11 are shown as being provided with a guide portion 7 on a side plate portion of the housing 5 and supported by the guide portion 7. In addition, the guide part 7 may be one in which a convex part is formed in the side plate part of the housing 5 or one in which a concave part is formed in the side plate part of the housing 5.

  Further, it is desirable that the guide portion 7 be provided with a vibration damping member 71 that functions to prevent generation of abnormal noise due to contact between the diaphragm 11 and the guide portion 7. As the vibration damping member 71, a material that is soft and hardly transmits vibration can be used. For example, a material having high elasticity such as urethane foam resin, rubber, and nonwoven fabric can be used.

In this way, the side edges 11c and 11d of the diaphragm 11 are supported by the housing 5, so that the diaphragm 11 is not affected by external force and the like, and the possibility that the energy transmission efficiency is reduced is reduced. The vibration plate 11 can be easily arranged on the housing 5.
1 and 2, the vicinity of one end 11a of the diaphragm 11 and both side edges 11c and 11d near the center in the longitudinal direction are shown as being supported by the guide portion 7 via a vibration damping member 71. ing.

  As a material of the curved diaphragm 11, paper such as carbon paper, flexible plastic such as polyimide or polyester, wood such as balsa material, or metal such as aluminum, beryllium, or boron can be used. The thickness of the curved diaphragm 11 is not particularly limited as long as it can be formed to have a curved surface portion that is curved in advance, or can be elastically bent and deformed.

Further, the curved diaphragm 11 has an opening 111 penetrating through the convex side and the concave side.
The opening 111 is an opening region in which the surface is notched so that one or more holes are formed in the curved diaphragm 11. For example, as shown in FIG. One may be formed, but as shown in FIG. 3B, a plurality of small openings 111 may be formed so as to present a pattern.

  The position of the opening 111 in the curved diaphragm 11 and the size of the opening 111 are arbitrary. However, depending on the position and the size, a specific frequency band may be lost. For this reason, attention must be paid to the design in consideration of the material used for the curved diaphragm 11 in consideration of the material. For example, it seems that it is desirable to provide the opening 111 having a small diameter at a position far from the one end 11a connected to the driver unit 3.

  By providing such an opening 111 in the curved diaphragm 11, sound can be emitted through the opening 111 without hindering sound emission from the second speaker unit 2, and resonance of the curved diaphragm 11 can be achieved. , Distortion can be suppressed, and excessive resonance can be suppressed to improve hearing by moderate harmonics.

  The driver unit 3 is an actuator that vibrates the curved diaphragm 11 according to an input (energized) electric signal (voice signal). As described above, the driver unit 3 is in contact with the end face of the one end side 11a of the curved diaphragm 11 at a substantially right angle so as to be driven in the same direction as the plane direction of the curved diaphragm 11.

  Examples of such a driver unit 3 include a moving coil type or a moving magnet type electromagnetic actuator. These driver units 3 have a high magnetic efficiency because the space factor of the coil is high. Therefore, clear sound emission with high volume can be expected.

  In the moving coil type actuator, a voice coil is inserted and arranged in a magnetic gap formed by a magnetic circuit, and when an electric signal or the like is applied to the voice coil, a vibration accompanying the applied signal is generated, and the moving coil is connected to the voice coil. The vibration is transmitted to the vibrating plate for driving. That is, since one end of the voice coil is housed in a magnetic circuit (magnetic field) and the other end is connected to the diaphragm, an input electric signal moves the voice coil, and the movement is transmitted to the diaphragm. Is converted to acoustic energy (sound).

In the present embodiment, the driver unit 3 can be a moving coil type actuator in which one end of a voice coil is inserted into a magnetic gap of a magnetic circuit and an electric signal is applied to drive the voice coil.
In the moving coil type actuator, the voice coil is formed by winding a coil wire having a desired diameter in a desired number of turns around an outer peripheral end of a cylindrical coil bobbin.

The magnetic circuit has a shape corresponding to driving a voice coil, and has a cylindrical permanent magnet and a pot-shaped yoke (hereinafter, referred to as “iron”) that is a good magnetic material that accommodates the permanent magnet. An inner-magnet type magnetic circuit composed of a disk plate also made of an iron material, which is arranged above the permanent magnet so as to cover the pot yoke.)
As the permanent magnet, a neodymium magnet, an alnico magnet, or a ferrite magnet can be used. However, a neodymium magnet, an alnico magnet, or the like is preferably used because a strong magnetic field can be obtained as compared with a ferrite magnet.

  The magnetic gap is formed by mounting a plate on the upper surface of a cylindrical neodymium magnet, and also forming an inner diameter portion of the yoke obtained by cutting the upper end of the outer periphery of the pot yoke to a predetermined diameter from the lower surface of the neodymium magnet. That is, since the outer diameter of the plate is mounted in alignment with the inner diameter of the pot yoke, a ring-shaped gap having a predetermined width dimension is provided between the inner diameter surface of the pot yoke and the outer diameter surface of the plate, that is, A gap is configured.

  The dimension of the magnetic gap in the depth direction is determined by the thickness of the plate and the thickness of the inner diameter of the pot yoke. Therefore, the magnetism of the neodymium magnet is guided to the gap by the pot yoke and the plate and is converged, so that a magnetic flux is generated in the gap and a magnetic gap is formed. Then, a voice coil is arranged at the center of the magnetic gap. The driver unit 3 is fixedly attached to the housing 5.

  The driver unit 3 is not limited to an actuator having an inner magnetic circuit as described above, but may be an actuator having an outer magnetic circuit using a ring-shaped ferrite magnet or the like.

  The curved diaphragm 11 can be connected and fixed to the tip of the driver unit 12 by a predetermined means. For example, means for attaching a disk-shaped vibration transmitting material to the top end of the voice coil, sandwiching the curved vibration plate using a pair of L-shaped fittings, and fixing the fitting to the vibration transmitting material by screwing or the like is known. Conceivable. It should be noted that there is no problem in attaching the curved diaphragm 11 to the driver unit 12 as long as the end face of the curved diaphragm 11 is in contact with the driver unit 12 even if it is inclined, sound is emitted. However, in order to prevent a decrease in the sound volume, it is desirable that the end face of the curved diaphragm 11 abuts the driver unit 12 at a substantially right angle.

  In the present invention, the second speaker unit 2 only needs to reproduce a frequency band different from that of the first speaker unit 1, and is used as a speaker unit used as a full range for the whole band or a speaker used as a woofer for a low band. A unit is desirable. In the present embodiment, a dynamic speaker unit used as a full range for all bands will be described as an example.

The second speaker unit 2 includes at least a cone-shaped diaphragm (hereinafter, referred to as “cone-shaped diaphragm”) 21 and a driver unit 22 that drives the cone-shaped diaphragm 21.
The cone-shaped diaphragm 21 is a mortar-shaped sheet-shaped member, and the small-diameter side is connected to the driver unit 22 and the large-diameter side is attached to the support member 8. That is, the cone-shaped diaphragm 21 has a voice coil inserted into a hole of a predetermined size (hereinafter, referred to as a “neck portion”) provided at the center portion on the small diameter side, and the neck portion and the outer periphery of the coil bobbin are formed. By applying an adhesive to the contact portion, it is connected and fixed to the driver unit 22.

  The driver unit 22 is an actuator that vibrates the cone-shaped diaphragm 21 in response to an input (energized) electric signal (audio signal). Like the driver unit 3 used in the first speaker unit 1, for example, And a moving coil type or moving magnet type electromagnetic actuator. Therefore, description of the driver unit 22 is omitted.

  As described above, the second loudspeaker unit 2 is configured so that sound can be emitted through the opening 111 of the curved diaphragm 11 of the first loudspeaker unit 1. It is arranged on the concave side of the plate 11 and fixedly attached to the housing 5. That is, the second speaker unit 2 is attached to the housing 5 via the support member 8 such that the sound emission side faces the opening 111 in the curved diaphragm 11 of the first speaker unit 1. .

As shown in FIG. 4, the support member 8 has a support opening 81 into which the driver unit 22 side of the second speaker unit 2 can be inserted, and arms 82 provided on both sides thereof. The support member 8 is provided so as to bridge the arm 82 between both side surfaces of the housing 5 and is attached to the housing 5 through a support member mounting screw hole 83 provided on an end surface of the arm 82. .
The support member 8 is provided with a speaker unit mounting screw hole 84, and a diaphragm mounting plate 211 mounted on the large diameter side of the cone-shaped diaphragm 21 in the second speaker unit 2 is screwed. The connection is established by the connection.

Further, the second speaker unit 2 is provided with a closing member 6 in a gap formed by the concave side of the curved diaphragm 11 in the first speaker unit 1 and the outer peripheral portion on the sound emission side of the second speaker unit 2. It is desirable to be arranged.
That is, this is to prevent the sound wave on the concave surface side of the curved diaphragm 11 in the first speaker unit 1 from interfering with the sound wave generated from the cone-shaped diaphragm 21 in the second speaker unit 2.

  The closing member 6 may be attached to the periphery of the opening 111 on the concave side of the curved diaphragm 11 of the first speaker unit 1, but as shown in the drawing, the bending of the first speaker unit 1 is performed. It is desirable that the vibration plate 11 be disposed so as to penetrate the opening 111.

  When the same electrical signal is input to the driver unit 12 of the first speaker unit 1 and the driver unit 22 of the second speaker unit 2, the speaker 10 configured as described above, The second speaker unit 2 emits sound in the same direction, sound pressure can be efficiently obtained, and a hybrid speaker system with a small installation area can be provided.

  Moreover, in the speaker 10 of the present invention, the sound from the first speaker unit 1 having the curved diaphragm 11 and the sound from the second speaker unit 2 of the full-range type having the cone-shaped diaphragm 21 are mixed. Accordingly, the low-frequency sound, for which the expansion of the reproduction frequency band is required in the first speaker unit 1, is supplemented in the second speaker unit 2, and a wide-band sound (a sound wave for hearing-impaired and hearing-impaired persons) can be reproduced. can do.

The electric signals input to the driver units 12 and 22 include, for example, audio signals output from televisions, radios, audio players, personal computers, smart devices such as smartphones and tablets, and the like.
Although not shown, a hole for mounting an audio jack and a switch is provided on the back plate of the housing 5.

  Therefore, the speaker 10 of the present invention has higher performance, is lighter in weight, has a smaller installation area, and has improved speaker versatility as compared with the conventional speaker systems for hearing-impaired and hearing-impaired people. A hybrid speaker system that allows both the hearing person and the hearing person to listen satisfactorily can be provided.

  Further, in the speaker 10 of the present invention, the second speaker unit 2 is disposed in the concave space of the curved diaphragm 11 of the first speaker unit 1, so that the installation area is small and the speaker 10 can be made compact. it can.

Although not shown, in the present invention, a third speaker unit is further provided, and the third speaker unit is configured to be able to emit sound through another surface except one open surface of the housing 5. It may be fixedly attached to the housing 5.
That is, for example, when one open surface of the housing 5 is used as a front plate portion, an opening penetrating through the back plate portion or the side plate portion is provided, and the third speaker unit is attached so as to emit sound from this opening portion. Shall be.

  The third speaker unit can be, for example, a speaker unit used as a full range for the entire band or a speaker unit used as a woofer for the low band, similarly to the second speaker unit. Thereby, a speaker without directivity can be obtained.

  REFERENCE SIGNS LIST 1 first speaker unit, 2 second driver unit, 5 housing, 6 closing member, 7 guide section, 8 support member, 10 speaker (hybrid speaker system), 11 curved diaphragm, 11a one end side, 11b, etc. End side, 11c, 11d Side edge, 12 driver unit, 21 cone-shaped diaphragm, 22 driver unit, 71 vibration damping member, 81 support opening, 82 arm, 111 opening.

Further, the speaker according to the present invention has a flat diaphragm, a driver unit that vibrates the diaphragm according to an input electric signal, and a housing having a hollow structure that houses the diaphragm and the driver unit. A housing, the housing has an opening on one surface, and the driver unit contacts an end surface on one end side of the diaphragm so as to be driven in the same direction as the surface direction of the diaphragm. Touching, and fixedly attached to the housing, the diaphragm forms a curved surface portion that curves from one end side to which the driver unit is attached to the other end side facing the driver unit, in the speaker which is arranged to cover the opening, with the first speaker unit composed of said driver unit and said diaphragm, a second speed which is accommodated in the housing Further comprising a unit, the first speaker unit, in the vibration plate convex side is arranged facing outwards, it has an opening through the convex side and a concave side, the second speaker unit It is fixed to the housing on the concave side of the diaphragm and attached to the housing so that sound can be emitted through the opening of the diaphragm of the first speaker unit. It can be rephrased as a basic feature.

DESCRIPTION OF SYMBOLS 1 1st speaker unit, 2 2nd speaker unit, 5 housing | casings, 6 closing member, 7 guide part, 8 support members, 10 speaker (hybrid type speaker system), 11 curved diaphragm, 11a one end side, 11b, etc. End side, 11c, 11d Side edge, 12 driver unit, 21 cone-shaped diaphragm, 22 driver unit, 71 vibration damping member, 81 support opening, 82 arm, 111 opening.

Claims (6)

A housing having a hollow structure with one open side, and a plurality of speaker units housed in the housing,
The first speaker unit is
A diaphragm having a curved surface portion that curves from one end side to the other end side,
A driver unit that vibrates the diaphragm according to an input electric signal;
At least,
The vibrating plate is arranged so that a convex surface faces outward so as to cover one open surface of the housing, an end surface portion at one end is fixed by abutting on the driver unit, and the other end is the other end. It has an opening connected to the housing and penetrating the convex side and the concave side,
The driver unit is fixedly attached to the housing,
The second speaker unit is
To be able to emit sound through the opening of the diaphragm of the first speaker unit, the diaphragm is fixed to the housing on the concave side of the diaphragm, and attached to the housing.
A speaker characterized by the above-mentioned. A flat plate-shaped diaphragm, a driver unit that vibrates the diaphragm according to an input electric signal, and a housing having a hollow structure that houses the diaphragm and the driver unit, are provided at least.
The housing has an opening on one surface,
The driver unit is in contact with an end surface of one end 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.
In the speaker, wherein the diaphragm forms a curved surface portion that curves from the one end side to which the driver unit is attached to the other end side opposite thereto, and is arranged so as to cover an opening of the housing.
Together with a first driver unit composed of the diaphragm and the driver unit, further comprising a second driver unit housed in the housing,
The first driver unit has an opening that penetrates the convex side and the concave side in the vibration plate in which the convex side faces outward.
The second driver unit is disposed on the concave side of the diaphragm so that sound can be emitted through the opening of the diaphragm of the first speaker unit, and is fixed to the housing. Have been
A speaker characterized by the above-mentioned.   The closing member is disposed in a gap defined by a concave side of the diaphragm in the first speaker unit and an outer peripheral portion on a sound emitting side in the second speaker unit. 3. The speaker according to 2.   The speaker according to claim 3, wherein the closing member is arranged so as to penetrate the opening of the diaphragm of the first speaker unit.   The speaker according to any one of claims 1 to 4, wherein the diaphragm of the first speaker unit has both side edges along a bending direction supported by the housing. Further comprising a third speaker unit,
8. The device according to claim 1, wherein sound is emitted through one surface of the housing other than the open surface, and the housing is fixedly attached to the housing. 9. Speaker.

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