WO2014091597A1

WO2014091597A1 - Speaker device

Info

Publication number: WO2014091597A1
Application number: PCT/JP2012/082345
Authority: WO
Inventors: 泰美梅津; 中村　徹; 宣章高橋
Original assignee: パイオニア株式会社; 東北パイオニア株式会社
Priority date: 2012-12-13
Filing date: 2012-12-13
Publication date: 2014-06-19

Abstract

The purpose of the present invention is to sufficiently increase the area of vibration plates to achieve a speaker device in which sufficient sound pressure is generated. The present invention is provided with: a plurality of vibration plates (1-1, 1-2); drive units (2) for driving the plurality of vibration plates (1-1, 1-2); and stationary parts (31, 32) for supporting the plurality of vibration plates (1-1, 1-2) and the drive units (2). The drive units (2) are provided with: voice coils (21); and magnetic circuits (22) including voice-coil support units (23) for supporting the voice coils (21). The voice-coil support units (23) are connected to the vibration plates (1-1, 1-2) via link mechanisms (6). Ends (1a-1, 1a-2) of the vibration plates (1-1, 1-2) in the sound emission direction (A) are supported on the stationary parts (32) via edge parts (12-1, 12-2). Ends (1b) of the vibration plates (1-1, 1-2) in the non-sound-emission direction (B) are supported on the stationary part (31).

Description

Speaker device

The present invention relates to a speaker device.

Conventionally, speaker devices are attached to automobile doors, personal computers, televisions or cabinets. In particular, when a speaker device is attached to an automobile, a personal computer, a television, or the like, there is a restriction on the attachment area. That is, in a general speaker device, a front surface in a direction in which a sound wave oscillated by a diaphragm (cone paper or the like) radiates occupies an area at least as large as the diaphragm.

Japanese Patent No. 4526356

In the conventional general speaker device, since there is a restriction on the mounting area, the area of the diaphragm cannot be sufficiently increased, and sufficient sound pressure cannot be obtained.

The problem to be solved by the present invention includes, for example, a problem that the area of the diaphragm generated in the above-described conventional speaker device cannot be sufficiently increased.

The speaker device according to claim 1, comprising: a plurality of diaphragms; a drive unit that drives the plurality of diaphragms; and a stationary unit that supports the plurality of diaphragms and the drive unit. Is connected to the diaphragm via another member, the end of the diaphragm in the sound radiation direction is supported by the stationary part via an elastic part, and the end of the diaphragm in the non-sound radiation direction is directly Or it is supported by the said stationary part via the other member, It is characterized by the above-mentioned.

It is the internal side view and front view of the speaker apparatus of 1st Example of this invention. It is the internal side view and front view of the speaker apparatus of 2nd Example of this invention. It is the internal side view and front view of the speaker apparatus of 3rd Example of this invention. It is a front view of the speaker apparatus of 4th Example of this invention. It is a figure which shows an example of the front view of a speaker apparatus of 5th Example of this invention, and a link member. It is a side view of the speaker apparatus of 6th Example of this invention. It is a figure which shows an example of the drive part of the Example of this invention. It is a figure which shows another example of the drive part of the Example of this invention.

Hereinafter, an embodiment of the present invention will be described. A speaker device according to an embodiment of the present invention includes a plurality of diaphragms, a drive unit that drives the plurality of diaphragms, and a stationary unit that supports the plurality of diaphragms and the drive unit. The drive unit includes a voice coil and a magnetic circuit including a support unit that supports the voice coil. The support part is connected to the diaphragm via another member. An end portion in the sound radiation direction of the diaphragm is supported by the stationary portion directly or via another member. An end portion of the diaphragm in the non-sound radiation direction is supported on the stationary portion directly or via another member.

An embodiment of the present invention will be described with reference to FIGS. In the following embodiments, the same symbols are added to the same elements.

(First Embodiment) The speaker device of the first embodiment of the present invention has the structure shown in FIG. The “sound radiating direction” in which the speaker device of the first embodiment radiates sound is the direction of arrow A shown in FIG. The “non-sound radiation direction” is the direction of arrow B shown in FIG. The speaker device includes a plurality of diaphragms 1 including a first diaphragm 1-1 and a second diaphragm 1-2. Further, a first drive unit 2-1 and a second drive unit 2-2 are provided to drive the first diaphragm 1-1 and the second diaphragm 1-2, respectively. Further, it has a back frame 31, a first side frame 32-1, and a second side frame 32-2 as “stationary portions”.

The first and second drive units 2-1 and 2-2 include voice coils 21-1 and 21-2 and magnetic circuits 22-1 and 22-2, respectively. The magnetic circuits 22-1 and 22-2 include voice coil support portions 23-1 and 23-2 as “support portions” for supporting the voice coils 21-1 and 21-2. The voice coil support portions 23-1 and 23-2 are connected to the diaphragms 1-1 and 1-2 via adhesives 4-1 and 4-2 as “other members”. The magnetic circuits 22-1 and 22-2 are fixed to the side frames 32-1 and 32-2.

The end portions 1a-1, 1a-2 in the sound radiation direction A of the first and second diaphragms 1-1, 1-2 are interposed via edge portions 12-1, 12-2 as “elastic portions”. Are supported by side frames 32-1 and 32-2 as “stationary portions”. Note that the edge portion is not limited to the shape shown in FIG. 1, but may be any structure as long as the diaphragms 1-1 and 1-2 are supported by the frame. The end 1 b of the diaphragm 1 in the non-sound radiating direction B is sandwiched between the fixed bar 5 and the back frame 31. Thus, the end 1b in the non-sound radiation direction B is supported by the back frame 31 as a “stationary part”. The first and second diaphragms 1-1 and 1-2 are formed by bending a single plate-like member at the end 1b, and the first diaphragm 1-1 and the second diaphragm The diaphragm 1-2 has substantially the same shape. The distance between the first diaphragm 1-1 and the second diaphragm 1-2 at the end portions 1a-1 and 1a-2 in the sound radiation direction A is the first distance at the end portion 1b in the non-sound radiation direction B. The distance between the diaphragm 1-1 and the second diaphragm 1-2 is larger.

With the above configuration, the same acoustic signal is supplied to the first and second magnetic circuits 22-1 and 22-2. As a result, the voice coil support portions 23-1 and 23-2 vibrate by linear movement, and the diaphragms 1-1 and 1-2 vibrate as indicated by an arrow C. The end portions 1a-1 and 1a-2 in the sound radiation direction of the diaphragms 1-1 and 1-2 vibrate so as to be close to and away from each other. A sound corresponding to the acoustic signal is radiated in the sound emission direction A by the vibration of the diaphragms 1-1 and 1-2.

The associating angle of the first and second diaphragms 1-1 and 1-2 at the end 1b in the non-sound radiation direction is smaller than 60 °. Therefore, the distance between the end portions 1a-1, 1a-2 in the sound radiation direction of the first and second diaphragms 1-1, 1-2 is set to be the first and second diaphragms 1-1, 1-2. Are smaller than each length (the length of the cross-section of FIG. 1A). Thereby, it is suitable for installation in a place where the occupied space on the surface is limited. Even if the mounting area is limited, the area of the diaphragms 1-1 and 1-2 can be sufficiently increased, and a sufficient sound pressure can be obtained.

(Second Embodiment) The speaker device of the second embodiment of the present invention has a structure shown in FIG. The “sound emission direction” in which the speaker device of the second embodiment emits sound is the direction of arrow A shown in FIG. The “non-sound radiation direction” is the direction of arrow B shown in FIG. The speaker device includes a plurality of diaphragms 1 including a first diaphragm 1-1 and a second diaphragm 1-2. In addition, one drive unit 2 that drives the first diaphragm 1-1 and the second diaphragm 1-2 is provided. Further, it has a back frame 31, a first side frame 32-1, and a second side frame 32-2 as “stationary portions”.

The drive unit 2 includes a voice coil 21 and a magnetic circuit 22. The magnetic circuit 22 includes a voice coil support portion 23 as a “support portion” that supports the voice coil 21. The voice coil support portion 23 is connected to the diaphragms 1-1 and 1-2 via a link mechanism 6 as “another member”. The magnetic circuit 22 is fixed to the side frames 32-1 and 32-2 by members not shown.

The end portions 1a-1, 1a-2 in the sound radiation direction A of the first and second diaphragms 1-1, 1-2 are interposed via edge portions 12-1, 12-2 as “elastic portions”. Are supported by side frames 32-1 and 32-2 as “stationary portions”. The end 1 b of the diaphragm 1 in the non-sound radiating direction B is sandwiched between the fixed bar 5 and the back frame 31. Thus, the end 1b in the non-sound radiation direction B is supported by the back frame 31 as a “stationary part”. The first and second diaphragms 1-1 and 1-2 are formed by bending one member at the end 1b. The first diaphragm 1-1 and the second diaphragm 1-2 has substantially the same shape. The distance between the first diaphragm 1-1 and the second diaphragm 1-2 at the end portions 1a-1 and 1a-2 in the sound radiation direction A is the first distance at the end portion 1b in the non-sound radiation direction B. The distance between the diaphragm 1-1 and the second diaphragm 1-2 is larger.

The link mechanism 6 includes a link member 61 corresponding to the first diaphragm 1-1 and a link member 62 corresponding to the second diaphragm 1-2. The

link members

61 and 62 have

joint portions

6a and 6b connected to the first and second diaphragms 1-1 and 1-2. Moreover, the

link members

61 and 62 are connected to the voice coil support part 23 of the drive part 2 by the joint part 6c. The

joint portions

6a, 6b, and 6c are portions that support or connect the

link members

61 and 62 with respect to other portions so that the angle can be changed.

With the above configuration, an acoustic signal is supplied to the magnetic circuit 22 and the voice coil support portion 23 vibrates by linear movement. The

link members

61 and 62 of the link mechanism 6 transmit the vibration of the voice coil support portion 23 to the diaphragms 1-1 and 1-2. The diaphragms 1-1 and 1-2 vibrate as indicated by an arrow C. The end portions 1a-1 and 1a-2 in the sound radiation direction of the diaphragms 1-1 and 1-2 vibrate so as to be close to and away from each other. A sound corresponding to the acoustic signal is radiated in the sound emission direction A by the vibration of the diaphragms 1-1 and 1-2.

In the second embodiment, only one drive unit 2 is required to vibrate the first and second diaphragms 1-1 and 1-2. Therefore, it is possible to reduce the cost. In addition, the configuration of wiring and the like for supplying an acoustic signal is simplified.

(Third Embodiment) A speaker device according to a third embodiment of the present invention has a structure shown in FIG. The “sound radiation direction” in which the speaker device of the third embodiment emits sound is the direction of arrow A shown in FIG. The “non-sound radiation direction” is the direction of arrow B shown in FIG. The speaker device includes a plurality of diaphragms 1 including a first diaphragm 1-1 and a second diaphragm 1-2. Further, a first drive unit 2-1 and a second drive unit 2-2 are provided to drive the first diaphragm 1-1 and the second diaphragm 1-2, respectively. Further, it has a back frame 31, a first side frame 32-1, and a second side frame 32-2 as “stationary portions”.

The first and second drive units 2-1 and 2-2 include voice coils 21-1 and 21-2 and magnetic circuits 22-1 and 22-2, respectively. The magnetic circuits 22-1 and 22-2 include voice coil support portions 23-1 and 23-2 as “support portions” for supporting the voice coils 21-1 and 21-2. The voice coil support portion 23-1 is connected to the diaphragm 1-1 via a first link mechanism 6-1 as “another member”. The voice coil support section 23-2 is connected to the diaphragm 1-2 via a second link mechanism 6-2 as “another member”. The magnetic circuits 22-1 and 22-2 are fixed to the back frame 31.

The end portions 1a-1, 1a-2 in the sound radiation direction A of the first and second diaphragms 1-1, 1-2 are interposed via edge portions 12-1, 12-2 as “elastic portions”. Are supported by side frames 32-1 and 32-2 as “stationary portions”. The end 1 b of the diaphragm 1 in the non-sound radiating direction B is sandwiched between the fixed bar 5 and the back frame 31. Thus, the end 1b in the non-sound radiation direction B is supported by the back frame 31 as a “stationary part”. The first and second diaphragms 1-1 and 1-2 are formed by bending one member at the end 1b. The first diaphragm 1-1 and the second diaphragm 1-2 has substantially the same shape.

The first and second link mechanisms 6-1 and 6-2 have the same structure that is mirror-symmetrical, and the diaphragm 1-1 (1-2) and the voice coil support 23-1 (23-2) are connected to each other. A link member 63 positioned between them, and a link member 64 positioned between the intermediate position of the link member 63 and the projections 32a-1 (32a-2) of the side frame 32-1 (32-2). . The link member 63 has a joint portion 6d connected to the diaphragm 1-1 (1-2). The link member 63 is connected to the voice coil support portion 23-1 (23-2) of the drive portion 2-1 (2-2) by a joint portion 6f. The link member 64 is connected to the protrusion 32a-1 (32a-2) by the joint portion 6e, and is connected to an intermediate position of the link member 63 by the joint portion 6g. The

joint portions

6d, 6e, 6f, and 6g are portions that support or connect the

link members

63 and 64, respectively, with respect to other portions so that the angle can be changed.

With the above configuration, the same acoustic signal is supplied to the first and second magnetic circuits 22-1 and 22-2. As a result, the voice coil support portions 23-1 and 23-2 vibrate by linear movement. The link members 63 of the link mechanisms 6-1 and 6-2 transmit the vibrations of the voice coil support portions 23-1 and 23-2 to the diaphragms 1-1 and 1-2. The diaphragms 1-1 and 1-2 vibrate as indicated by an arrow C. The end portions 1a-1 and 1a-2 in the sound radiation direction of the diaphragms 1-1 and 1-2 vibrate so as to be close to and away from each other. A sound corresponding to the acoustic signal is radiated in the sound emission direction A by the vibration of the diaphragms 1-1 and 1-2.

(Fourth Embodiment) A speaker device according to a fourth embodiment of the present invention has a structure shown in FIG. The “sound radiating direction” in which the speaker device of the fourth embodiment radiates sound is the front side in FIG. The “non-sound radiation direction” is the back side as viewed in FIG. The speaker device includes a plurality of diaphragms 1 including a first diaphragm 1-1, a second diaphragm 1-2, and a third diaphragm 1-3. In addition, a first driving unit 2-1 and a second driving unit 2-2 that drive the first diaphragm 1-1, the second diaphragm 1-2, and the third diaphragm 1-3, respectively. A third drive unit 2-3 is provided. Further, it has a back frame 31 and a cylindrical side frame 32 as “stationary portions”.

The first to third drive units 2-1, 2-2, 2-3 have voice coils 21-1, 21-2, 21-3 and magnetic circuits 22-1, 22-2, 22-3, respectively. And. The magnetic circuits 22-1, 22-2, and 22-3 are voice coil support portions 23-1, 23-2, and 23 as "support portions" that support the voice coils 21-1, 21-2, and 21-3. -3 is included. The voice coil support portion 23-1 is connected to the diaphragm 1-1 via a first link mechanism 6-1 as “another member”. The voice coil support section 23-2 is connected to the diaphragm 1-2 via a second link mechanism 6-2 as “another member”. The voice coil support portion 23-3 is connected to the diaphragm 1-3 via a third link mechanism 6-3 as “another member”. The magnetic circuits 22-1 2-2 and 22-3 are fixed to the back frame 31.

Ends 1a-1, 1a-2, and 1a-3 in the sound radiation direction of the first to third diaphragms 1-1, 1-2, and 1-3 are edge portions 12- serving as “elastic portions”. 1, 21-2 and 12-3 are supported by side frames 32 as “stationary portions”. Ends 1b of the diaphragms 1-1, 1-2, 1-3 in the non-sound radiating direction are supported on a back frame 31 as a “stationary part” by a member (not shown).

The first to third link mechanisms 6-1, 6-2 and 6-3 have the same structure as the link mechanisms 6-1 and 6-2 of the third embodiment (FIG. 3). In FIG. 4, only the link member 63 and the

joint portions

6d and 6f of the link mechanisms 6-1, 6-2 and 6-3 are shown, but the same link member 64 and

joint portions

6e and 6g as in the third embodiment are shown. It also has. The link mechanisms 6-1, 6-2, and 6-3 are respectively similar to the third embodiment in the diaphragm 1-1 (1-2, 1-3) and the voice coil support portion 23-1 ( 23-2, 23-3).

With the above configuration, the same acoustic signal is supplied to the first to third magnetic circuits 22-1, 22-2 and 22-3. As a result, the voice coil support portions 23-1, 23-2 and 23-3 vibrate by linear movement. The link members 63 of the link mechanisms 6-1, 6-2, 6-3 transmit vibrations of the voice coil support portions 23-1, 23-2, 23-3 to the diaphragms 1-1, 1-2, 1-3. introduce. The diaphragms 1-1, 1-2, and 1-3 vibrate inward and outward in the same manner as the arrow C in the third embodiment. The end portions 1a-1, 1a-2, and 1a-3 in the sound radiation direction of the diaphragms 1-1, 1-2, and 1-3 vibrate so as to approach and separate from each other. Sound corresponding to the acoustic signal is radiated in the direction of sound emission by the vibration of the diaphragms 1-1, 1-2, and 1-3.

The associating angle of the first to third diaphragms 1-1, 1-2, 1-3 at the end portion 1b in the non-sound radiation direction is smaller than 60 °. Accordingly, the distance between the end portions 1a-1, 1a-2, 1a-3 in the sound radiation direction of the first to third diaphragms 1-1, 1-2, 1-3 is set to the first to third. The lengths of the diaphragms 1-1, 1-2, and 1-3 are smaller. Thereby, it is suitable for installation in a place where the occupied space on the surface is limited. Even if the mounting area is limited, the area of the diaphragms 1-1, 1-2, and 1-3 can be sufficiently increased, and a sufficient sound pressure can be obtained.

(Fifth Embodiment) A speaker apparatus according to a fifth embodiment of the present invention has a structure shown in FIG. The “sound radiating direction” in which the speaker device of the fifth embodiment radiates sound is the front side in FIG. The “non-sound radiation direction” is the back side as viewed in FIG. The speaker device includes a plurality of diaphragms 1 including a first diaphragm 1-1, a second diaphragm 1-2, a third diaphragm 1-3, and a fourth diaphragm 1-4. Yes. In addition, one drive unit 2 is provided for driving the first diaphragm 1-1, the second diaphragm 1-2, the third diaphragm 1-3, and the fourth diaphragm 1-4, respectively. . Further, it has a back frame 31 and a cylindrical side frame 32 as “stationary portions”.

The drive unit 2 includes a voice coil 21 and a magnetic circuit 22. The magnetic circuit 22 includes a voice coil support portion 23 as a “support portion” that supports the voice coil 21. The voice coil support portion 23 is connected to the diaphragms 1-1, 1-2, 1-3, and 1-4 via a link mechanism 6 as “another member”. The magnetic circuit 22 is fixed to the side frame 32 by a member (not shown).

Ends 1a-1, 1a-2, 1a-3, and 1a-4 in the sound radiation direction of the first to fourth diaphragms 1-1, 1-2, 1-3, and 1-4 are “elastic portions”. Are supported by side frames 32 as “stationary portions” via edge portions 12-1, 12-2, 12-3, and 12-4. Ends (not shown) of the diaphragms 1, 1-2, 1-3, 1-4 in the non-sound radiating direction are supported on a back frame 31 as a “stationary part” by a member (not shown).

The link mechanism 6 is provided with two sets of the same configuration as the link mechanism 6 of the second embodiment (FIG. 2). That is, it has a cross shape in which two pairs of link members 61-1 and 62-3 and two pairs of link members 61-2 and 62-4 are provided so as to intersect at right angles. Similarly to the second embodiment, each link member 61-1, 61-2, 62-3, 62-4 has

joint portions

6a, 6b, 6c.

One set of link members 61-1 and 62-3 has

joint portions

6a and 6b connected to the first and third diaphragms 1-1 and 1-3. The link members 61-1 and 62-3 are connected to the voice coil support portion 23 of the drive unit 2 by

joint portions

6c and 6c. The other set of link members 61-2 and 62-4 has

joint portions

6a and 6b connected to the second and fourth diaphragms 1-2 and 1-4. The link members 61-2 and 62-4 are connected to the voice coil support portion 23 of the drive unit 2 by

joint portions

6c and 6c. The

joint portions

6a, 6b, and 6c are portions that support or connect the link members 61-1, 61-2, 62-3, and 62-4 to the other portions so that the angle can be changed.

With the above configuration, an acoustic signal is supplied to the magnetic circuit 22 and the voice coil support portion 23 vibrates by linear movement. The link members 61-1, 61-2, 62-3, 62-4 of the link mechanism 6 transmit the vibration of the voice coil support portion 23 to the diaphragms 1-1, 1-2, 1-3, 1-4. . The diaphragms 1-1, 1-2, 1-3, and 1-4 vibrate inward and outward in the same manner as the arrow C in the second embodiment. The end portions 1a-1, 1a-2, 1a-3, and 1a-4 in the sound radiation direction of the diaphragms 1-1, 1-2, 1-3, and 1-4 vibrate so as to approach and separate from each other. Sound corresponding to the acoustic signal is radiated in the direction of sound emission by the vibration of the diaphragms 1-1, 1-2, 1-3, and 1-4.

The associating angle of the first to fourth diaphragms 1-1, 1-2, 1-3, 1-4 at the end portion 1b in the non-sound radiation direction is smaller than 60 °. Therefore, the mutual ends of the end portions 1a-1, 1a-2, 1a-3, and 1a-4 in the sound radiation direction of the first to fourth diaphragms 1-1, 1-2, 1-3, and 1-4. The interval is smaller than the lengths of the first to fourth diaphragms 1-1, 1-2, 1-3, and 1-4. Thereby, it is suitable for installation in a place where the occupied space on the surface is limited. Even if the mounting area is limited, the areas of the diaphragms 1-1, 1-2, 1-3, and 1-4 can be made sufficiently large, and a sufficient sound pressure can be obtained.

In the fifth embodiment, only one drive unit 2 is required to vibrate the first and fourth diaphragms 1-1, 1-2, 1-3, and 1-4. Therefore, the cost can be reduced. In addition, the configuration of wiring and the like for supplying an acoustic signal is simplified.

(Sixth Embodiment) A speaker device according to a sixth embodiment of the present invention has a structure shown in FIG. The “sound emission direction” in which the speaker device of the sixth embodiment emits sound is the direction of arrow A shown in FIG. The “non-sound radiation direction” is the direction of arrow B shown in FIG. The speaker device includes a plurality of diaphragms 1 including a first diaphragm 1-1 and a second diaphragm 1-2. In addition, one drive unit 2 that drives the first diaphragm 1-1 and the second diaphragm 1-2 is provided. Further, it has a back frame 31 as a “stationary part” and a side frame (not shown).

Ends 1d-1 and 1d-2 on the inner side in the sound radiation direction A of the first and second diaphragms 1-1 and 1-2 are respectively attached to side frames (not shown) by fixing portions 33 as "stationary portions". It is supported. Ends 1b-1 and 1b-2 in the non-sound radiating direction B of the diaphragms 1-1 and 1-2 are supported by the back frame 31 by a fixing part 34. The first and second diaphragms 1-1 and 1-2 are respectively connected from the end portions 1b-1 and 1b-2 in the non-sound radiating direction B to the end portions 1a-1, 1a-2 and 1d in the sound radiating direction A. -1 and 1d-2 are formed with a plurality of bent portions 1c-1 and 1c-2. In this example, a plurality of bent portions 1c-1 (1c-2) are formed from the outer end 1a-1 (1a-2) to the inner end 1d-1 (1d-2). The portion corresponds to an “elastic portion”, and the end portions 1a-1 and 1a-2 in the sound radiation direction A are supported on the stationary portion by the elastic portion.

The link mechanism 6 includes a link member 61 corresponding to the first diaphragm 1-1, a link member 62 corresponding to the second diaphragm 1-2, and a link member 65 connected to the drive unit 2. . The

link members

61 and 62 have

joint portions

link members

61 and 62 are connected to the link member 65 by the joint part 6c. The link member 65 is connected to the voice coil support part 23 of the drive part 2. The

joint portions

6a, 6b, and 6c are portions that support or connect the

link members

61 and 62 with respect to other portions so that the angle can be changed.

link members

61, 62, 65 of the link mechanism 6 transmit the vibration of the voice coil support portion 23 to the diaphragms 1-1, 1-2. The diaphragms 1-1 and 1-2 vibrate as indicated by an arrow C. The end portions 1a-1 and 1a-2 on the outer side in the sound radiation direction of the diaphragms 1-1 and 1-2 vibrate so as to be close to and away from each other. Further, since the diaphragms 1-1 and 1-2 have a plurality of bent portions 1c-1 and 1c-2, they vibrate in an expanded and contracted manner. Thereby, the sound according to the acoustic signal is radiated in the direction of the sound radiation direction A.

The first and second diaphragms 1-1 and 1-2 are wide in the vertical direction having the bent portions 1c-1 and 1c-2. The distance between the outer ends 1a-1 and 1d-2 is smaller than the lengths of the first and second diaphragms 1-1 and 1-2. Thereby, it is suitable for installation in a place where the occupied space on the surface is limited. Even if the mounting area is limited, the area of the diaphragms 1-1 and 1-2 can be sufficiently increased, and a sufficient sound pressure can be obtained.

In the sixth embodiment, only one drive unit 2 is required to vibrate the first and second diaphragms 1-1 and 1-2. Therefore, the cost can be reduced. In addition, the configuration of wiring and the like for supplying an acoustic signal is simplified.

FIG. 7 is a diagram showing an example of the drive unit, and this drive unit is applied as the drive unit 2 (2-1, 2-2, 2-3) in the first to sixth embodiments. The drive unit 2 includes the voice coil 21 and the magnetic circuit 22 having a magnetic gap 22G in which the voice coil 21 is disposed. The voice coil 21 has a cross-sectional shape that is an annular shape. The cross section of the voice coil 21 here is a surface extending in a direction intersecting the vibration direction (X-axis direction in the drawing) of the voice coil 21 itself.

The voice coil 21 is composed of, for example, a linear conductive member wound around the illustrated X axis. In the illustrated example, the conductive member is supported by the annular voice coil support portion 23. The voice coil support portion 23 may be made of a known resin material. A connecting portion 23 a connected to the diaphragm 1 or the link mechanism 6 is attached to an end portion of the voice coil support portion 23.

The magnetic circuit 22 includes a yoke 22A, a magnet 22B, and a plate 22C, and the yoke 22A includes an outer peripheral cylindrical portion 22A1, a bottom surface portion 22A2, and a column portion 22A3. The magnet 22B is magnetically joined to the column portion 22A3, and a magnetic gap 22G is formed between the outer peripheral surface of the plate 22C and the outer peripheral cylindrical portion 22A1 of the yoke 22A. When a voice signal is input to the voice coil 21 via a lead wire (not shown), the voice current flowing through the voice coil 21 crosses the magnetic flux of the magnetic gap 22G, thereby generating a Lorentz force, thereby supporting the voice coil 21 and the voice coil. The part 23 vibrates along the X-axis direction. This is a driving force for vibrating the diaphragm 1 (1-1, 1-2, 1-3, 1-4).

FIG. 8B is a diagram showing another example of the drive unit, and this drive unit is applied as the drive unit 2 (2-1, 2-2, 2-3) in the first to sixth embodiments. The drive unit 2 includes the voice coil 21 wound around the voice coil support unit 23 and the magnetic circuit 22 having a magnetic gap 22G. The voice coil support portion 23 in another example of the drive portion has a plate shape. The magnetic circuit 22 includes a yoke 22D and a plurality of magnets 221 to 224.

Magnets

221, 223 and

magnets

222, 224 are provided on both sides of the magnetic gap 22G along the direction of the magnetic field. For example, the magnetic gap 22G is formed in a groove shape so that the voice coil 21 can move within a specified range along a predetermined direction.

The yoke 22D has a lower flat portion 22D1, an upper flat portion 22D2, and a column portion 22D3. The lower flat portion 22D1 and the upper flat portion 22D2 are arranged substantially parallel to each other with a predetermined interval, and the support column portion 22D3 is substantially at the center with respect to the lower flat portion 22D1 and the upper flat portion 22D2. It is formed so as to extend in the orthogonal direction.

When a voice signal (current) flows through the lead coil (not shown) in the voice coil 21 in the magnetic field, Lorentz force is applied along the direction perpendicular to the direction of the magnetic field and the direction of the current according to Fleming's left hand rule. Arise. That is, a Lorentz force is generated in the voice coil 21 along the X-axis direction, and the voice coil 21 and the voice coil support portion 23 vibrate along the X-axis direction. This is a driving force for vibrating the diaphragm 1 (1-1, 1-2, 1-3, 1-4).

As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention. Although only the configuration in which the driving unit drives the voice coil by a magnetic circuit is disclosed, the driving unit may be a piezoelectric element, a magnetostrictive element, an artificial muscle, or the like. The embodiments described in the above drawings can be combined with each other as long as there is no particular contradiction or problem in the purpose, configuration, or the like. Moreover, the description content of each figure can become independent embodiment, respectively, and embodiment of this invention is not limited to one embodiment which combined each figure.

A Sound radiation direction B Non-sound radiation direction 1-1 (1) First diaphragm 1-2 (1) Second diaphragm 1-3 (1) Third diaphragm 1-4 (1) Fourth End 1a-1 of sound radiation direction End 1a-2 of sound radiation direction End 1a-3 of sound radiation direction End 1a of sound radiation direction End 1b of sound radiation direction End 1b-1 of sound radiation direction End portion 1b-2 in the non-sound radiation direction End portion 1c-1 in the non-sound radiation direction Bending portion 12-1 Edge portion (elastic portion)
12-2 Edge part (elastic part)
12-3 Edge part (elastic part)
12-4 Edge part (elastic part)
2 Driving Unit 2-1 First Driving Unit 2-2 Second Driving Unit 2-3 Third Driving Unit 21 Voice Coil 21-1 Voice Coil 21-2 Voice Coil 21-3 Voice Coil 22 Magnetic Circuit 22- DESCRIPTION OF SYMBOLS 1 Magnetic circuit 22-2 Magnetic circuit 22-3 Magnetic circuit 23 Voice coil support part (support part)
23-1 Voice coil support (support)
23-2 Voice coil support (support)
23-3 Voice coil support (support)
31 Rear frame (stationary part)
32-1 First side frame (stationary part)
32-2 Second side frame (stationary part)
33 Fixed part (stationary part)
4-1 Adhesive (other members)
4-2 Adhesive (other members)
6 Link mechanism (other members)
6-1 Link mechanism (other members)
6-2 Link mechanism (other members)
6-3 Link mechanism (other members)
61 link member 62 link member 63 link member 64 link member 65 link member 6a joint part 6b joint part 6c joint part 6d joint part 6f joint part 6e joint part 6g joint part 22G magnetic gap 22A yoke 22B magnet 22C plate 22D yoke 221 magnet 222 Magnet 223 Magnet 224 Magnet

Claims

A plurality of diaphragms;
A drive unit for driving the plurality of diaphragms;
A stationary portion that supports the plurality of diaphragms and the driving portion;
With
The drive unit is connected to the diaphragm via another member,
An end in the sound radiation direction of the diaphragm is supported on the stationary part via an elastic part,
The speaker device, wherein an end portion of the diaphragm in a non-sound radiation direction is supported by the stationary portion directly or via another member.
The plurality of diaphragms are:
2. The speaker device according to claim 1, wherein the speaker device vibrates so that the end portions in the sound radiation direction are close to and away from each other.
The drive unit includes a voice coil,
The speaker device according to claim 2, further comprising a support portion that supports the voice coil.
3. The speaker device according to claim 2, wherein the other member connecting the support portion and the diaphragm includes a joint portion.
5. The speaker device according to claim 4, wherein the other member connecting the support portion and the diaphragm includes a link member having the joint portion.
3. The speaker device according to claim 2, wherein the plurality of diaphragms include first and second diaphragms.
The first diaphragm and the second diaphragm are formed so as to have substantially the same shape by bending one plate-like member at the center thereof. Speaker device.
The distance between the first diaphragm and the second diaphragm at the end in the sound radiation direction is:
The speaker device according to claim 6, wherein the speaker device has a distance greater than a distance between the first diaphragm and the second diaphragm at an end portion in the non-sound radiation direction.
The first diaphragm and the second diaphragm are formed with a plurality of bent portions from an end in the non-sound radiating direction toward an end in the sound radiating direction. 6. The speaker device according to 6.
The drive unit is
A magnet,
A magnetic gap in which the voice coil is located;
The speaker device according to claim 1, further comprising:
The speaker device according to claim 10, wherein the voice coil support portion positioned in the magnetic gap has a plate shape.