WO2016158285A1

WO2016158285A1 - Sound generating device

Info

Publication number: WO2016158285A1
Application number: PCT/JP2016/057534
Authority: WO
Inventors: 和昭渡辺; 佐藤　純一; 晋宮田; 誠鶴田
Original assignee: パイオニア株式会社; 東北パイオニア株式会社; アンデン株式会社
Priority date: 2015-03-31
Filing date: 2016-03-10
Publication date: 2016-10-06

Abstract

In a sound generating device according to the present invention, stable vibration of a voice coil (1) is achieved without a damper that supports the voice coil. A vibrator (2) is provided with a bending section (2C) having a deformation part (21) that deforms as a result of vibration of the voice coil (1). The vibrator (2) is formed of a resin member integrally with the bending section (2C). A dust-proof net (4) extending from an inner surface (3a) of a frame (3) towards the voice coil (1) is provided. An inner circumferential section (41) of the dust-proof net (4) is joined to a tinsel wire (6) at a projecting section (42). Stable vibration of the voice coil (1) is realized without resonance of the tinsel wire (6).

Description

Sound generator

The present invention relates to a sound generator.

Conventionally, as a sound generator, for example, there is a speaker device disclosed in Japanese Patent Application Laid-Open No. 61-1199 (Patent Document 1). In this conventional speaker device, the voice coil is joined to the center of the diaphragm, and the diaphragm and the voice coil are held by fitting the horizontal edge of the diaphragm into the cylindrical standing edge of the frame.

JP-A-61-1199

The above-mentioned patent document 1 discloses a structure for holding a diaphragm and a voice coil with a frame, but does not describe the material and detailed structure of the diaphragm and the edge. The diaphragm and the edge are generally integrated with paper. However, with such a material, there is a problem that if there is no damper, the voice coil comes into contact with the magnetic circuit and the diaphragm is not vibrated well.

An example of a problem to be solved by the present invention is to provide a sound generator that stably vibrates a voice coil without providing a damper.

The sound generator according to claim 1 includes a voice coil, a vibrating body to which the voice coil is connected, and a frame that supports the vibrating body, and the vibrating body is deformed along with the vibration of the voice coil. An outer vibrating portion having a deforming portion is provided, and the outer vibrating portion of the vibrating body is formed of a resin.

The sound generator according to claim 17 includes a voice coil, a vibrating body to which the voice coil is connected, and a frame that supports the vibrating body, and the vibrating body is deformed along with the vibration of the voice coil. And an outer vibrating portion having a deformed portion, and the vibrating body is formed of resin, so that the damper for supporting the voice coil is eliminated.

It is the top view and longitudinal cross-sectional view of the speaker apparatus as an example of the sound generator of the Example of this invention. It is a disassembled perspective view of the speaker apparatus of an Example. It is a partial perspective view around the dust-proof net of the speaker device of the embodiment. It is an expanded sectional view of the outside vibration part of the speaker apparatus of an example. It is a schematic plan view which shows the Example of the tinsel wire of the speaker apparatus of an Example, and a modification.

Hereinafter, an embodiment of the present invention will be described. A sound generator according to an embodiment of the present invention includes a voice coil, a vibrating body to which the voice coil is connected, and a frame that supports the vibrating body. The vibrating body is accompanied by vibration of the voice coil. The vibration part which has a deformation | transformation part to deform | transform is provided. And the vibration part is integrally molded by the resin member.

The resin member may be a member having an imide bond.

It may be provided with a tinsel wire provided on the frame and connecting the terminal part and the voice coil.

複数 Multiple tinsel wires may be drawn from the voice coil in the same direction.

A plurality of tinsel wires may be drawn from the voice coil in opposite directions.

The ends of the plurality of tinsel wires on the voice coil side may be arranged close to each other and facing each other.

The tinsel wire may be supported by an elastic member provided in the frame.

It is possible to provide an internal component extending from the inner surface of the frame toward the voice coil, and the inner peripheral part of the internal component outside the voice coil may be connected to the tinsel wire.

The inner peripheral portion of the internal component member may be provided with a protruding portion extending toward the voice coil, and the tinsel wire may be connected to the protruding portion.

The magnetic circuit housed in the frame may be provided, the opening of the frame may be covered with a breathable internal component, and the inner peripheral portion of the internal component may be closer to the frame than the voice coil.

The magnetic circuit is supported by the frame, and the opening of the frame is covered with a breathable internal component, and the internal configuration is arranged between the outer peripheral portion and the inner peripheral portion of the vibrator in the radial direction of the vibrator. An inner peripheral portion of the member may be provided.

A magnetic circuit having a magnet and a yoke forming a magnetic gap in which the voice coil is disposed may be provided, and a stepped portion may be provided in a part of the yoke facing the lower end portion of the voice coil.

A part of the vibrating body facing the magnetic circuit may have a concave shape.

The distance from a part of the concave-shaped vibrating body to the magnetic circuit may be larger than the distance from the lower end of the voice coil to the step of the yoke.

The vibrating body may include a first vibrating portion and a concave second vibrating portion surrounding the first vibrating portion.

The vibrating body includes a deformable third vibrating portion surrounding the second vibrating portion, and the third vibrating portion has a first convex portion and a second convex portion on the outer periphery thereof, In the radial direction, the width of the first convex portion may be larger than the width of the second convex portion.

A sound generator according to an embodiment of the present invention includes a voice coil, a vibrating body to which the voice coil is connected, and a frame that supports the vibrating body. The vibrating body accompanies vibration of the voice coil. And an outer vibrating portion having a deformed portion that deforms. The outer vibration portion is formed of resin, so that the damper that supports the voice coil is eliminated.

1 is a plan view and a longitudinal sectional view of a speaker device as an example of a sound generating device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the speaker device, and FIG. 3 is a part around the dust-proof net of the speaker device. FIG. 4 is an enlarged cross-sectional view of an outer vibration portion of the speaker device. Note that the concept of “upper and lower” in the following description corresponds to the upper and lower in the drawing of FIG.

The speaker device according to the present embodiment includes a voice coil 1, a vibrating body 2 to which the voice coil 1 is connected, a frame 3 that supports the vibrating body 2, and a dustproof net 4 that is an example of an “internal constituent member”. And a magnetic circuit 5.

The voice coil 1 has a cylindrical shape with the axis L as the central axis, and is formed by winding a coil around a polyimide bobbin. The vibrating body 2 is disposed coaxially with the voice coil 1 about the axis L. The vibrating body 2 is formed of a thin plate member. The vibrating body 2 includes an inner vibrating portion provided inside the voice coil 1 and an outer vibrating portion provided outside the voice coil 1. An example of the inner vibrating portion is the center cap 2A. The outer vibration part includes a second vibration part and a third vibration part provided outside the second vibration part. An example of the second vibrating part is a cone-like vibrating part 2B. An example of the third vibrating portion is a curved portion 2C.

The center cap portion 2A has substantially the same diameter as the voice coil 1, and has a concave shape that is recessed inward of the voice coil 1 in the direction of the axis L. The voice coil 1 is connected to the vibrating body 2 at the boundary between the center cap portion 2A and the cone-shaped vibrating portion 2B. That is, the voice coil 1 is fitted in the fitting hole 2a at the center of the cone vibrating portion 2B and fixed with, for example, an adhesive, and the center cap portion 2A is put on the upper end portion of the voice coil 1 and the outer periphery thereof is covered. For example, it is fixed to the cone-shaped vibrating portion 2B and the voice coil 1 with an adhesive.

The curved portion 2C includes a deformed portion 21 that deforms in response to vibration in the direction of the axis L of the voice coil 1, and a flat plate portion 22 that extends outside the deformed portion 21. It is integrally molded with a resin member together with the cone-shaped vibrating portion 2B. Each of the curved portion 2C, the cone-shaped vibrating portion 2B, and the center cap portion 2A is a polyimide member that is an example of a “member having an imide bond”.

The frame 3 is made of a metal member such as iron, aluminum, magnesium, or a resin member, and has a substantially frustoconical first bulging portion (first outer peripheral side surface) 31 and a smaller diameter than the first bulging portion 31. And a thin cylindrical second bulging portion (second outer peripheral side surface) 32 and a flange portion (diaphragm mounting portion) 33 formed on the outer periphery of the first bulging portion 31. A plurality of openings 31 a are formed on the side surface of the first bulging portion 31, and the inner surface 3 a of this side surface is the “inner surface of the frame”. The flat plate portion 22 of the bending portion 2 </ b> C of the vibrating body 2 is fixed to the flange portion 33, and the vibrating body 2 is supported by the frame 3. Thereby, the cone-shaped vibrating portion 2 </ b> B, the center cap portion 2 </ b> A, and the voice coil 1 are disposed in the first bulging portion 31. The magnetic circuit 5 is disposed in the second bulging portion 32 or attached to the bulging portion 32.

The dustproof net 4 has a shape that follows the inner method of the first bulging portion 31 of the frame 3, and the dustproof net 4 is accommodated in the first bulging portion 31. The dustproof net 4 is obtained by impregnating a cotton net with a phenol resin, and has elasticity and air permeability.

As shown in FIG. 3, the inner peripheral portion 41 outside the voice coil 1 of the dustproof net 4 is provided with a protruding portion 42 extending toward the voice coil 1. A terminal portion 7 is provided outside the first bulging portion 31 of the frame 3, and the terminal portion 7 and the voice coil 1 are connected by a tinsel wire 6. The tinsel wire 6 is connected to the protrusion 42 so as to engage with the protrusion 42 of the dustproof net 4. Thereby, the inner peripheral part 41 outside the voice coil 1 is connected to the tinsel wire 6. Further, the dustproof net 4 is an elastic member having elasticity, and the tinsel wire 6 is supported by an elastic member provided in the frame 3.

The magnetic circuit 5 includes a yoke 51, a magnet 52, and a plate 53. The yoke 51 and the plate 53 are made of a magnetic metal such as iron. The magnet 52 is a neodymium magnet. The magnet 52 may be, for example, a permanent magnet such as ferrite, samarium / cobalt, or alnico. The yoke 51 is a thin bottomed cylindrical member in which the cylindrical portion 51a and the bottom portion 51b are integrated, and has a stepped portion 51c protruding inward at the boundary between the cylindrical portion 51a and the bottom portion 51b. The magnet 52 and the plate 53 have a disk shape.

The disk-shaped magnet 52 and the plate 53 are stacked on the bottom 51b of the yoke 51 and arranged in the cylinder 51a. Further, the outer circumferences of the magnet 52 and the plate 53 are respectively installed with a predetermined distance between the inner circumference surface of the cylindrical portion 51 a of the yoke 51. Thereby, a magnetic gap 5 </ b> G is formed between the inner peripheral end of the plate 22, the upper end of the cylindrical portion 51 a of the yoke 51, and the outer periphery of the plate 53. The voice coil 1 is disposed in the magnetic gap 5G of the magnetic circuit 5. When a voice signal is input to the voice coil 1, the voice coil 1 vibrates along the axis L direction and vibrates the vibrating body 2. As a result, the sound radiation direction is parallel to the axis L.

As described above, the vibrating body 2 includes the curved portion 2C having the deformed portion 21 that is deformed in accordance with the vibration of the voice coil 1, and the outer vibrating portion of the vibrating body 2 is formed of at least a resin. Therefore, the deformed portion of the outer vibration portion and other portions other than the deformed portion are integrally formed of resin. Therefore, stable vibration of the voice coil 1 can be realized without a conventional damper that supports the voice coil. Further, the weight is reduced by the amount of no damper, and the sound pressure is improved.

Further, since the tinsel wire 6 is provided in the frame 3 and has elasticity, it is supported by the dustproof net 4 (elastic member), so that the tinsel wire 6 does not resonate and realizes stable vibration of the voice coil 1. be able to.

Further, a dustproof net 4 extending from the inner surface 3 a of the frame 3 toward the voice coil 1 is provided, and an inner peripheral portion 41 of the dustproof net 4 outside the voice coil 1 is connected to the tinsel wire 6. Yes. Thereby, the stable vibration of the voice coil 1 can be realized without the tinsel wire 6 resonating.

Further, the inner peripheral portion 41 of the dustproof net 4 is provided with a protruding portion 42 extending toward the voice coil 1, and the tinsel wire 6 is connected to the protruding portion 42. Thereby, the tinsel wire 6 can be flexibly supported while following the vibration of the voice coil 1.

In addition, the magnetic circuit 5 accommodated in the frame 3 is provided, the opening 31a of the frame 3 is covered with a dustproof net 4 having air permeability, and the dustproof net is disposed on the frame 3 side (inner surface 3a side) from the voice coil 1. There are four inner peripheral portions 41. Thereby, dust-proof measures are taken especially for the magnetic circuit 5. Further, the dust-proof net 4 can provide an air resistance against the air in and out of the frame 3 (back space of the vibrating body 2) and the outside, and the vibrating body 2 (and the voice coil 1) vibrates downward too. Can be suppressed.

The opening 31 a of the frame 3 is covered with a dustproof net 4 having air permeability, and the inner peripheral portion of the dustproof net 4 is disposed between the outer peripheral portion and the inner peripheral portion of the vibrating body 2 in the radial direction of the vibrating body 2. 41 is located. Accordingly, it is possible to prevent the vibrating body 2 that vibrates downward from coming into contact with the dust-proof net 4 and to sufficiently ensure the amplitude of the vibrating body 2.

Further, since the step 51c is provided in the yoke 51 of the magnetic circuit 5 at a position facing the lower end of the voice coil 1, even if the voice coil 1 vibrates greatly downward, the lower end of the voice coil 1 Abuts against the stepped portion 51c and the stepped portion 51c serves as a stopper, so that deformation of the vibrating body 2 can be prevented.

Further, the vibrating body 2 includes a center cap portion 2A having a concave shape at a position facing the magnetic circuit 5. On the other hand, as shown in FIG. 1B, the distance h1 from the center cap portion 2A, which is part of the concave-shaped vibrating body 2 to the magnetic circuit 5, is reduced from the lower end portion of the voice coil 1 to the yoke. It is larger than the distance h3 to the step portion 51c. As a result, the step portion 51 serves as a stopper, and the center cap portion 2A can be prevented from coming into contact with the magnetic circuit 5.

The vibrating body 2 includes a center cap portion 2A (first vibrating portion) and a concave cone-shaped vibrating portion 2B (second vibrating portion) surrounding the center cap portion 2A. Thereby, the peak dip due to the vibration of the cone-shaped vibrating portion 2B can be reduced.

FIG. 4 is an enlarged cross-sectional view of the curved portion 2C. The deformed portion 21 of the curved portion 2C has a first convex portion 21a and a second convex portion 21b. The illustrated arrow P is the radial direction of the vibrating body 2, the first convex portion 21a has a width W1 in the radial direction, and the second convex portion 21b has a width W2 in the radial direction. W1 is a distance from the position where the extended surface of the flat plate portion 22 intersects the cone-shaped vibrating portion 2B to the boundary between the first convex portion 21a and the second convex portion 21b. W2 is the distance from the boundary between the first convex portion 21a and the second convex portion 21b to the boundary between the second convex portion 21b and the flat plate portion 22.

The vibrating body 2 vibrates due to the vibration of the voice coil 1, and the displacement of the vibrating body 2 at this time increases as it becomes closer to the inner peripheral side (voice coil 1 side). On the other hand, the radial width W1 of the first convex portion 21a is larger than the radial width W2 of the second convex portion 21b. Therefore, the deformed portion 21 having the first convex portion 21a having the large width W1 on the inner peripheral side can follow the displacement (and stress) due to the vibration of the vibrating body 2 without difficulty, and the cone-shaped vibrating portion 2B (first shape). 2 vibration part) can be flexibly supported by the curved part 2C (third vibration part).

FIG. 5 is a schematic plan view showing an embodiment and a modification of the voice coil and the tinsel wire. FIG. 5A is a positional relationship between the voice coil 1 and the tinsel wire 6 in the embodiment, and FIG. Example 1 and FIG. 5C show Modification Example 2, and FIG. 5D shows Modification Example 3. FIG.

In the case of the embodiment of FIG. 5A and the modification 1 of FIG. 5B, two (plural) tinsel wires 6 are drawn from the voice coil 1 in the same direction. This facilitates the routing of the tinsel wire 6 to the terminal portion 7. In particular, in the case of the first modification, the end portions on the voice coil side of the two (plural) tinsel wires 6 are arranged close to each other and face each other.

In the case of Modification 2 in FIG. 5C and Modification 3 in FIG. 5D, two (plural) tinsel wires 6 are drawn from the voice coil 1 in opposite directions. In this case, the end of the tinsel wire 6 on the voice coil 1 side is in a rotationally symmetric position rotated by 180 ° with respect to the center of the voice coil 1, or two (plural) tinsel wires 6 are 1 is arranged symmetrically so that the masses of the voice coil 1 and the entire vibrating body are not biased to the left or right, and so on, there is no influence on the vibration of the voice coil 1.

Note that the speaker device (sound generating device) of the embodiment can be used as a normal speaker for reproducing audio such as music, and can also be used as an alarm speaker. It can also be used for speakers that generate sounds emitted by hybrid vehicles.

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. For example, the tinsel wire 6 may be covered with a resin member to suppress the occurrence of resonance. The embodiments shown in the above drawings can be combined with each other as long as there is no particular contradiction or problem in the purpose and configuration. 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.

DESCRIPTION OF SYMBOLS 1 Voice coil 2 Vibrating body 2A Center cap part (1st vibrating part, a part of concave-shaped vibrating body, inside vibrating part)
2B Cone-shaped vibrating part (second vibrating part, part of outer vibrating part)
2C bending portion (third vibration portion, part of outer vibration portion)
21 deformed portion 21a first convex portion 21b second convex portion 22 flat plate portion 3 frame 3a inner surface 4 dustproof net (internal component member)
5 Magnetic circuit 51 Yoke 52 Magnet 53 Plate 5G Magnetic commission gap 6 Kinshi wire 7 Terminal part L Axis line

Claims

A voice coil, a vibrator to which the voice coil is connected, and a frame that supports the vibrator,
The sound generator according to claim 1, wherein the vibrating body includes an outer vibrating portion having a deformed portion that is deformed in accordance with the vibration of the voice coil, and the outer vibrating portion of the vibrating body is formed of a resin.
The sound generator according to claim 1, wherein the resin has an imide bond.
The sound generator according to claim 1 or 2, further comprising a tinsel wire provided on the frame and connecting the terminal portion and the voice coil.
The sound generator according to claim 3, wherein a plurality of the tinsel wires are drawn out from the voice coil in the same direction.
The sound generator according to claim 3, wherein a plurality of the tinsel wires are drawn out from the voice coil in opposite directions.
5. The sound generator according to claim 4, wherein ends of the plurality of the tinsel wires on the voice coil side are arranged close to each other and face each other.
The sound generator according to claim 3, wherein the tinsel wire is supported by an elastic member provided in the frame.
An internal component extending from the inner surface of the frame toward the voice coil;
The sound generator according to any one of claims 3 to 6, wherein an inner peripheral portion of the internal component member outside the voice coil is connected to the tinsel wire.
The inner peripheral portion of the internal component member includes a protruding portion extending toward the voice coil,
The sound generator according to claim 8, wherein the tinsel wire is connected to the protruding portion.
The opening of the frame is covered with a breathable internal component,
The sound generator according to any one of claims 1 to 6, wherein an inner peripheral portion of the internal component member is provided on the frame side of the voice coil.
The opening of the frame is covered with a breathable internal component,
The inner peripheral portion of the internal component member is located between the outer peripheral portion and the inner peripheral portion of the vibrating body in the radial direction of the vibrating body. Sound generator.
Comprising a magnetic circuit having a yoke;
The sound generator according to any one of claims 1 to 11, wherein a step portion is provided in a part of the yoke facing a lower end portion of the voice coil.
The sound generator according to claim 11, wherein a part of the vibrating body facing the magnetic circuit has a concave shape.
14. The sound generator according to claim 13, wherein a distance from a part of the vibrating body to the magnetic circuit is larger than a distance from a lower end portion of the voice coil to a step portion of the yoke.
The sound generator according to any one of claims 1 to 12, wherein the vibrating body includes a first vibrating portion and a concave second vibrating portion surrounding the first vibrating portion.
The vibrating body includes a deformable third vibrating portion that surrounds the second vibrating portion, and the third vibrating portion includes a first convex portion and a second convex portion on an outer periphery thereof. The sound generator according to claim 15, wherein a width of the first convex portion is larger than a width of the second convex portion in a radial direction of the vibrating body.
A voice coil, a vibrator to which the voice coil is connected, and a frame that supports the vibrator,
The vibrating body includes an outer vibrating portion having a deformed portion that is deformed along with the vibration of the voice coil, and the outer vibrating portion is formed of a resin, thereby eliminating a damper that supports the voice coil. A sound generator characterized by.