WO2011125804A1

WO2011125804A1 - Speaker device

Info

Publication number: WO2011125804A1
Application number: PCT/JP2011/058146
Authority: WO
Inventors: 研也渡辺; 和昭渡辺
Original assignee: パイオニア株式会社; 東北パイオニア株式会社
Priority date: 2010-03-31
Filing date: 2011-03-30
Publication date: 2011-10-13

Abstract

In the disclosed thinner or smaller speaker device, the outer part (21A) of a vibrator (21) is rigid and protrudes outside a voice coil (25). The outer part (21A) of the vibrator (21) is disposed radially near or outside a second magnetic pole (32). An edge (22), which is disposed above the second magnetic pole (32), is provided with: a first curved part (23) which is convex in the direction in which sound is emitted; and a concave second curved part (24) which connects to the first curved part (23). The first curved part (23) is disposed near the second magnetic pole (32), the second curved part (24) is disposed to the outside of the first curved part (23), and the inner edge of the first curved part (23) is joined to the vibrator (21).

Description

Speaker device

The present invention relates to a speaker device.

The speaker device has a diaphragm, a voice coil, and a magnetic circuit as basic components. The conventional speaker device described in Patent Document 1 below includes a relatively flat diaphragm main body whose diaphragm is made of foamed mica or the like, and an outer peripheral portion of the diaphragm is supported by a frame via an edge. . A voice coil is provided on the lower surface of the diaphragm main body, and the lower end of the voice coil is disposed in a magnetic gap between a center pole and a yoke forming a magnetic circuit.

Japanese Utility Model Publication No. 62-147991

The speaker device is installed in various electronic devices that generate sound. At this time, for example, in the case of being mounted on a portable electronic device, the speaker device is required to be thin and small in order to improve its portability.

The present invention is an example of a problem to deal with such a problem. That is, an object of the present invention is to make the speaker device thin or small.

In order to achieve such an object, the speaker device according to the present invention includes at least the configuration according to the following independent claims.
The vibration unit includes a stationary part, a vibration part, and a magnetic circuit, and the vibration part is supported by the vibration body, an edge that supports the vibration body on the stationary part, and the vibration body directly or via another member. The magnetic circuit includes a magnetic gap composed of a first magnetic pole part and a second magnetic pole part, and a magnet, and the outer peripheral part of the vibrator has rigidity, The outer periphery of the vibrating body protrudes outside the voice coil, and is arranged near or outside the position of the second magnetic pole in the radial direction, and the edge is above the second magnetic pole. The edge includes a first curved portion that is convex with respect to the acoustic radiation direction, and a concave second curved portion that is continuous with the first curved portion, and the first curved portion. Is disposed in the vicinity of the second magnetic pole portion, and the second curved portion is the first bay. An inner peripheral portion of the first bending portion is connected to the vibrating body, and the first bending portion with respect to the second magnetic pole portion in the vibration direction of the voice coil. The position of an inner peripheral part is higher than the position of the inner peripheral part of the said 2nd bending part with respect to a said 2nd magnetic pole part, The speaker apparatus characterized by the above-mentioned.

1 is a cross-sectional view showing an overall configuration of a speaker device according to an embodiment of the present invention. FIG. 2 is a partial enlarged cross-sectional view of FIG. 1. Explanatory drawing which shows the detail of the edge of the speaker apparatus which concerns on embodiment of this invention (explanatory drawing which showed the cross section along the acoustic radiation | emission direction of an edge). X1-X1 sectional drawing of FIG. Explanatory drawing which showed the whole structure of the magnetic circuit in the speaker apparatus which concerns on embodiment of this invention (the figure (a) is a top view, the figure (b) is a perspective view). Explanatory drawing which shows the magnetic circuit in the speaker apparatus which concerns on embodiment of this invention. Explanatory drawing which showed the attachment structure which attaches the magnetic circuit in the speaker apparatus which concerns on embodiment of this invention to a stationary part. Explanatory drawing which showed the attachment structure which attaches the magnetic circuit in the speaker apparatus which concerns on embodiment of this invention to a stationary part. Explanatory drawing which showed the attachment structure which attaches the magnetic circuit in the speaker apparatus which concerns on embodiment of this invention to a stationary part. Explanatory drawing which showed the attachment structure which attaches the magnetic circuit in the speaker apparatus which concerns on embodiment of this invention to a stationary part. Explanatory drawing which showed the structure of the terminal part in the speaker apparatus which concerns on embodiment of this invention. Explanatory drawing which showed the structure of the terminal part in the speaker apparatus which concerns on embodiment of this invention. Explanatory drawing which showed the structure of the terminal part in the speaker apparatus which concerns on embodiment of this invention. 1 is an external perspective view showing an overall configuration of a speaker device according to an embodiment of the present invention. 1 is an external perspective view showing an overall configuration of a speaker device according to an embodiment of the present invention. Explanatory drawing which shows the detail of the edge of the speaker apparatus which concerns on other embodiment of this invention (explanatory drawing which showed the cross section along the acoustic radiation | emission direction of an edge). Explanatory drawing which showed the example of application of the speaker apparatus which concerns on embodiment of this invention. It is explanatory drawing which showed the other example of the electronic device which is an application example of the speaker apparatus which concerns on embodiment of this invention. It is explanatory drawing which showed the example of mounting to the electronic device of the speaker apparatus which concerns on embodiment of this invention. It is explanatory drawing which showed the example of mounting to the electronic device of the speaker apparatus which concerns on embodiment of this invention. It is explanatory drawing which showed the example of mounting to the electronic device of the speaker apparatus which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each of the following figures is an explanatory view for explaining a speaker device according to an embodiment of the present invention. In the drawings, common portions are denoted by the same reference numerals, and a part of overlapping description is omitted. The illustrated X direction is the acoustic radiation direction, and the illustrated Y direction is the radial direction (width direction) of the speaker device.

FIG. 1 is a cross-sectional view showing an overall configuration of a speaker device according to an embodiment of the present invention, and FIG. 2 is a partially enlarged cross-sectional view thereof. The speaker device 1 includes a stationary part 10, a vibrating part 20, and a magnetic circuit 30. The vibration unit 20 includes a vibration body 21, an edge 22 that supports the vibration body 21 on the stationary portion 10, and a voice coil 25 that is supported on the vibration body 21 directly or via another member. The magnetic circuit 30 includes a magnetic gap 30G composed of a first magnetic pole part 31 and a second magnetic pole part 32, and a magnet 35 (inner magnet 35B). The voice coil 25 is disposed in the magnetic gap 30G. The vibration part 20 is supported by the stationary part 10 (for example, the outer peripheral cylindrical part 11A of the frame 11) so as to freely vibrate. In FIG. 1, the first magnetic pole part 31 is a plate 34, and the second magnetic pole part 32 is constituted by a yoke 33. The edge 22 may be formed integrally with the vibrating body 21, or may be formed separately and joined to the vibrating body 21 directly or through another member such as an adhesive. Note that FIG. 1 shows that the edge 22 is disposed on the magnetic circuit 30 side with respect to the upper surface of the vibrating body 21. In particular, the inner peripheral portion of the edge 22 is joined to the lower surface of the vibrating body 21 directly or via another member such as an adhesive.

[Structure of the vibration part and positional relationship between the vibration part and other parts]
The vibrating body 21 itself has rigidity, and the outer peripheral portion 21 A of the vibrating body 21 having rigidity protrudes outside the voice coil 25. Thus, by projecting the outer peripheral portion 21 A to the outside of the voice coil 25, the edge 22 approaches the yoke 33 from a position away from the voice coil 25 supported by the vibrating body 21 by the protrusion of the outer peripheral portion 21 A. Will be curved. Therefore, when the voice coil 25 vibrates in the magnetic gap 30G, the vibrating body 21 has a structure in which the curved portion of the edge 22 hardly interferes with the upper portion of the second magnetic pole portion 32 (yoke 33).

In the illustrated example, the outer peripheral portion 21 A of the vibrating body 21 is disposed near or outside the position of the second magnetic pole portion 32 in the radial direction (Y direction in the drawing). That is, the outer peripheral portion 21 A of the vibrating body 21 is disposed on the wall portion 33 B of the yoke 33 that becomes the second magnetic pole portion 32 as shown in FIGS. 2 and 3. Further, the outer peripheral portion 21 A of the vibrating body 21 extends near or outside the position of the wall portion 33 B of the yoke 33. In the illustrated example, the outer peripheral portion 21A of the vibrating body 21 is disposed in the vicinity of or on the outer side of the inner side surface of the wall portion 33B. Moreover, you may arrange | position in the position vicinity of the outer side surface of wall part 33B, or the outer side, without being limited to the example of illustration. According to this, when the curved portion of the edge 22 is formed from the outer peripheral portion 21A, the curved portion of the edge 22 is formed at a position outside the magnetic gap 30G. For this reason, the curved portion of the edge 22 is less likely to interfere with the second magnetic pole portion 32 (yoke 33) that forms the magnetic gap 30G.

FIG. 3 shows details of the edge 22 and shows a cross section along the acoustic radiation direction of the edge 22. The edge 22 is disposed on the second magnetic pole portion 32, and has a first curved portion 23 having a convex shape toward the acoustic radiation direction (X direction in the drawing), and a concave second curved portion 24. It has. The second bending portion 24 is provided continuously with the first bending portion 23. As described above, a part of the second bending portion 24 that is continuous with the first bending portion 23 is less likely to interfere with the second magnetic pole portion 32. Specifically, since the second bending portion 24 is separated from the wall portion 33B of the yoke 33 by the size of the first bending portion 23 in the radial direction, it is difficult to interfere with the second magnetic pole portion 32.

The first bending portion 23 is disposed on and in the vicinity of the second magnetic pole portion 32, and the second bending portion 24 is disposed outside the first bending portion 23. As a result, the top 24C of the second curved portion 24 can be positioned on the outer side (Y direction side) of the second magnetic pole portion 32, and the top portion 24C that is most likely to interfere is the second magnetic pole portion 32 (yoke 33). It becomes possible to provide in the position away from.

The inner peripheral portion 23 A of the first bending portion 23 is connected to the vibrating body 21. The position of the inner peripheral portion 23A of the first curved portion 23 relative to the second magnetic pole portion 32 in the vibration direction of the voice coil 25 is the inner peripheral portion 24A of the second curved portion 24 relative to the second magnetic pole portion 32. It is higher than the position. That is, the height h1 from the second magnetic pole portion 32 to the inner peripheral portion 24A of the second bending portion 24 and the height h2 from the second magnetic pole portion 32 to the inner peripheral portion 23A of the first bending portion 23 are set. In comparison, h1 <h2. In this manner, a relatively large gap can be provided between the second magnetic pole portion 32 and the inner peripheral portion 23A of the first bending portion 23.

The first bending portion 23 at the edge 22 includes a top portion 23 C provided between the inner peripheral portion 23 A of the first bending portion 23 and the outer peripheral portion 23 B of the first bending portion 23. The top portion 23 C of the first bending portion 23 is disposed outside the outer peripheral portion 21 A of the vibrating body 21. Further, the top portion 23 C of the first bending portion 23 is disposed on the second magnetic pole portion 32, and on the voice coil 25 side with respect to the lower surface of the vibrating body 21 facing the voice coil 25, the magnetic circuit 30. The inner peripheral portion 23A of the first bending portion 23 is the same height as the height of the top portion 23C of the first bending portion 23 with respect to the magnetic circuit 30. Is arranged. Further, in the radial direction, the position of the top portion 23C is disposed in the vicinity of the position of the inner side surface of the second magnetic pole portion 32 (the inner side surface of the wall portion 33B of the yoke 33). Alternatively, in the radial direction, the position of the top 23C is outside the position of the inner side surface of the second magnetic pole portion 32 (the inner side surface of the wall 33B of the yoke 33, the inner side surface of the magnet 35B described later), The magnetic pole portion 32 is disposed on the inner side of the outer side surface (the outer side surface of the wall portion 33B of the yoke 33 and the outer side surface of the magnet 35B described later). By forming the first bending portion 23 having the top portion 23C in this way, the inner peripheral portion 24A of the second bending portion 24 is located on the vibrating body 21 side and away from the second magnetic pole portion 32. Can be provided.

Further, the first curved portion 23 has a length L1 along the radial direction. The second bending portion 24 has a length obtained by adding the lengths L2 and L3 along the radial direction. Here, the length L2 is the length from the inner peripheral portion 24A to the top portion 24C of the second curved portion 24, and the length L3 is the length from the top portion 24C to the outer peripheral portion 24B of the second curved portion 24. is there. By providing the first bending portion 23 between the second bending portion 24 and the vibrating body 21, the top 24C of the second bending portion 24 is separated from the second magnetic pole portion 32 by a length L1. Can be provided at different positions. For this reason, a relatively large gap can be provided between a part of the second bending portion 24 and the second magnetic pole portion 32 in the height direction, and the second bending portion 24 becomes the second magnetic pole portion. 32 can be prevented from interfering. In the illustrated example, the distance (L2 + L3) between the inner peripheral portion 24A of the second curved portion 24 and the outer peripheral portion 24B of the second curved portion 24 in the radial direction is the second magnetic pole portion 32 and the edge 22. Is larger than a distance S1 between a part of the stationary part 10 (for example, the frame 11) that supports the frame.

When the vibrating body 21 is stationary (no audio current is input to the voice coil 25), the position of the outer peripheral portion 22B of the edge 22 in the voice coil 25 is relative to the position of the inner peripheral portion 22A of the edge 22. High or substantially the same. As the voice coil 25 vibrates, the inner peripheral portion 22 A of the edge 22 vibrates up and down from the outer peripheral portion 22 B of the edge 22. Since the speaker device 1 includes the outer peripheral portion 22B of the edge 22 and the inner peripheral portion 22A of the edge 22, the speaker device 1 can be thinned. Further, the inner peripheral portion 22 A of the edge 22 may be disposed inside the voice coil 25 and inside the outer peripheral portion of the plate 34 that is the first magnetic pole portion 31. In this case, the inner peripheral portion 22 A is disposed on the plate 34 that is the first magnetic pole portion 31.

The second curved portion 24 has a top portion 24C provided between the inner peripheral portion 24A and the outer peripheral portion 24B. The top portion 24 C of the second bending portion 24 is arranged outside the position of the inner side surface of the second magnetic pole portion 32 in the radial direction, and the second magnetic pole portion 32 in the vibration direction of the voice coil 25. Is provided at a high position. With this arrangement, the top 24 C of the second bending portion 24 may approach the second magnetic pole portion 32 with the vibration of the voice coil 25, but a part of the second bending portion 24 is It can arrange | position so that it may not contact the 2nd magnetic pole part 32. FIG.

The inner peripheral portion 24A of the second curved portion 24 is a portion where the shape of the edge 22 changes from a concave shape to a convex shape in the acoustic radiation direction (X direction in the drawing). Further, the outer peripheral portion 23B of the first bending portion 23 is a portion where the shape of the edge 22 changes from a convex shape to a concave shape in the acoustic radiation direction (X direction in the drawing). In other words, the inner peripheral portion 24A of the second bending portion 24 or the outer peripheral portion 23B of the first bending portion 23 is disposed substantially at the inflection point at the edge 22 or in the vicinity of the inflection point.

A distance S1 between the second magnetic pole portion 32 and a part of the stationary portion 10 that supports the edge 22 in the radial direction (Y direction in the drawing) is between the inner peripheral portion 22A and the outer peripheral portion 22B of the edge 22. It is formed smaller than the distance S2. The height of the second magnetic pole portion 32 in the vibration direction of the voice coil 25 is set lower than the height of the first magnetic pole portion 31 (there is a difference in height of Δh in FIG. 2). The distance (h3 + Δh) from the vibrating body 21 to the second magnetic pole portion 32 in the vibration direction is formed to be larger than the distance (h3) from the vibrating body 21 to the first magnetic pole portion 31.

The bending radius R1 of the first bending portion 23 is smaller than the bending radius R2 of the second bending portion 24, and the first bending portion 23 has a relatively large bending rigidity. When the bending radius R1 of the first bending portion 23 is relatively large, the first bending portion 23 is likely to bend (is easily deformed) and may easily interfere with the second magnetic pole portion 32. Further, unnecessary resonance (including split resonance and reverse resonance) may occur. In addition, a rolling phenomenon may be induced with the occurrence of this unnecessary resonance. When the bending radius R1 of the first bending portion 23 is relatively small as described above, it is possible to suppress the occurrence of unnecessary resonance and improve the acoustic characteristics.

The edge 22 includes a third curved portion 24X on the outer peripheral portion 24B of the second curved portion 24. In the illustrated example, the third bending portion 24X is provided in a convex shape in the acoustic radiation direction (X direction). The magnitude relationship between the bending diameter R1 of the first bending portion 23, the bending diameter R2 of the second bending portion 24, and the bending diameter R3 of the third bending portion 24X is R2> R1> R3. That is, in the cross section of the edge 22 along the acoustic radiation direction shown in FIG. 3, the length along the curvature of the second curved portion 24 is larger than the length along the curvature of the first curved portion 23. The length along the curvature of the first bending portion 23 is larger than the length along the curvature of the third bending portion 24X. By providing such a third bending portion 24X, the second bending portion 24 can be separated from the stationary portion 10 that supports the outer peripheral portion of the edge 22 (for example, the outer peripheral cylindrical portion 11A of the frame 11). It can suppress that 22 interferes with the stationary part 10.

The second curved portion 24 of the edge 22 includes a reinforcing portion 24E protruding from the surface 24D of the second curved portion 24 along the radial direction thereof, and the reinforcing portion 24E of the second curved portion 24 is the second curved portion 24E. The curved portion 24 is disposed between the outer peripheral portion 24B and the inner peripheral portion 24A and extends to the vicinity of the outer peripheral portion 23B of the first curved portion 23. In the illustrated example, the reinforcing portion 24E extends from the vicinity of the position of the inner peripheral portion 24A of the second curved portion 24 to the vicinity of the position of the outer peripheral portion 24B. According to this, the reinforcing portion 24E can effectively ensure the amplitude of the vibrating body 21 by the second bending portion 24 having a large bending diameter. Further, since the reinforcing portion 24E imparts appropriate rigidity to the second curved portion 24, the edge 22 can support the vibrating body 21 at a predetermined position. In addition, the rolling phenomenon (rolling) can be prevented from occurring in the voice coil 25. Further, when the vibrating body 21 vibrates, the edge 22 may be deformed in the circumferential direction, so that a corner portion of the edge may be wrinkled. In addition, a rolling phenomenon may occur in the voice coil 25 due to the generation of the wrinkles. The reinforcing portion 24E has a shape that expands and contracts its shape along the circumferential direction. Specifically, the reinforcing portion 24E includes a top portion, and the shape of the reinforcing portion 24E expands and contracts by bending or refracting at the top portion. It is possible to prevent wrinkles from occurring at the corners of the edge 22 due to the bending motion or the refraction motion of the reinforcing portion 24E. Further, the occurrence of the rolling phenomenon of the voice coil 25 can be suppressed.

Generally, when the speaker device is thinned or miniaturized, it is conceivable that the diaphragm and the magnetic circuit are brought close to each other to make the speaker device thin, or the frame is made closer to the magnetic circuit to be miniaturized. At this time, since the concave edge is disposed in a state of being close to the yoke of the magnetic circuit, when the diaphragm vibrates, the edge may come into contact with the yoke. In addition, abnormal noise may occur due to such contact.

The speaker device 1 includes the structure described above, and thus has a structure in which the edge 22 is less likely to come into contact with the second magnetic pole portion 32 (yoke 33), which is a constituent member of the magnetic circuit 30, when the vibrating body 21 vibrates. Accordingly, even when the speaker device 1 is thinned by bringing the vibrating body 21 close to the magnetic circuit 30, it is possible to suppress contact between the edge 22 and the yoke 33 and generation of abnormal noise due to this contact. become.

That is, the speaker device 1 suppresses the contact between the edge 22 and the yoke 33 and is outside the connecting position between the rigid vibrating body 21 and the voice coil 25 in order to reduce the thickness or size of the speaker device 1. And an outer peripheral portion 21 A of the vibrator 21 disposed in the vicinity of the second magnetic pole portion 32. In addition, the speaker device 1 includes a first bending portion 23 that is a convex bending portion, and a second bending portion 24 that is disposed outside the first bending portion 23 and is a concave bending portion. The edge 22 is provided. Since the speaker device 1 includes such a vibration unit 20, the speaker device 1 can be reduced in size and thickness, and the contact of the edge 22 with the yoke 33 and generation of abnormal noise due to the contact are suppressed. can do.

Although the illustrated edge 22 has an inner peripheral portion 22A, the edge 22 may have only the outer peripheral portion 22B. Specifically, the edge 22 and the vibrating body 21 may be integrally formed. Further, the vibrating body 21 may have a two-layer structure of a member having elasticity and a member having rigidity formed integrally with the edge 22. In this case, the elastic member is arranged on the magnetic circuit 30 side with respect to the rigid member, so that the elastic member is arranged on the acoustic radiation side with respect to the rigid member. The speaker device 1 can be thinned.

Since the top 23C of the first bending portion 23 is provided in the vicinity of the outer peripheral portion 21A of the rigid vibrating body 21, a part of the first bending portion 23 vibrates even while the vibrating body 21 is vibrating. The height substantially the same as that of the body 21 can be maintained, and contact with the second magnetic pole portion 32 can be suppressed. Moreover, since the distance between the 1st bending part 23 and the 2nd bending part 24 can be made comparatively large, the amplitude of the vibrating body 21 can be made comparatively large.

As the speaker device is downsized, there is a problem that the effective vibration area of the vibrating body is reduced. By disposing the outer peripheral portion 21A of the vibrating body 21 outside the voice coil 25 and further extending to the vicinity of the top portion 23C of the first bending portion 23, a relatively large effective area of the vibrating body 21 can be obtained. . In addition, the top portion 23C is located away from the outer peripheral portion 21A of the vibrating body 21 while being substantially smaller than the vibrating body 21 while keeping the bending radius R1 of the first bending portion 23 relatively small (maintaining rigidity). By arranging them at the same height, a part of the first bending portion 23 can be a part of the vibrator 21. In this case, the effective vibration area of the speaker device 1 can be made relatively large.

Not limited to the above description, the inner peripheral portion 22A of the edge 22 can be made higher than the outer peripheral portion 22B of the edge 22. In this case, the distance between the edge 22 and the second magnetic pole portion 32 can be increased, the contact between the two can be suppressed, and the amplitude of the vibrating body 21 can be relatively increased.

The distance between the first bending portion 23 and the second magnetic pole portion 32 can be made relatively large by disposing the top portion 24C of the second bending portion 24 outside the second magnetic pole portion 32. Also by this, contact between the edge 22 and the second magnetic pole portion 32 can be suppressed. Moreover, since the distance between the 1st curved part 23 and the 2nd magnetic pole part 32 can be made comparatively large, the contact with the 1st curved part 23 and the 2nd magnetic pole part 32 can be suppressed.

The vibrating body 21 includes a rigid vibration member 21B having rigidity, and the rigid vibration member 21B includes, for example, a ceramic material such as carbon as a constituent element. As shown in FIG. 4, the rigid vibration member 21 B includes a foam layer 21 C having a foam structure and a covering layer 21 D covering the foam layer 21 C. The thickness of the vibrating body 21 is formed larger than the thickness of the inner peripheral portion 22 A of the edge 22. Further, the thickness of the vibrating body 21 is formed smaller than the thickness of the voice coil 25 in the vibration direction of the voice coil 25. Moreover, the vibrating body 21 may be formed of a resin material, paper made of natural fibers, a non-woven fabric having fibers formed of a resin material, or a non-woven fabric containing an adhesive resin, if necessary. . The vibrating body 21 made of these materials can be provided with rigidity by using a resin material that exhibits a predetermined thickness or rigidity.

The vibrating body 21 can have a flat plate shape, a dome shape, or a cone shape. In terms of reducing the thickness of the speaker device 1, the vibrating body 21 may have a flat plate shape. Further, the planar shape of the vibrating body 21 can be formed into a shape (rectangular shape) defined by the major axis and the minor axis, a circle, a polygon, or the like. In the present embodiment, the vibrating body 21 is formed in a rectangular shape.

The edge 22 is made of a resin member. In addition, the vibrating body 21 having the rigid vibration member 21B has substantially the same shape as the rigid vibration portion 21B in the illustrated example, is made of polyetherimide, has a density of about 1.27 g / cm ³ , and a Young's modulus. Has a small density and a large rigidity with respect to the comparative vibrator having a pressure of about 4 MPa. Further, the thickness of the vibrating body 21 is smaller than the total height of the edge 22.

The thickness of the inner peripheral portion 22A of the edge 22 is formed smaller than the thickness of the vibrating body 21. For this reason, the edge 22 efficiently propagates the vibration of the voice coil 25 to the vibrating body 21 and also serves as a cushioning material for the vibrating body 21. The edge 22 may be formed substantially uniformly, for example, with the thickness of the inner peripheral portion 22A, and at the same time, the entire height of a part of the edge 22 having the reinforcing portion 24E may be formed larger than the other parts. I do not care.

The magnitude obtained by dividing the Young's modulus in the vibrator 21 by the density is larger than the magnitude obtained by dividing the Young's modulus in the above-described comparative vibrator by the density. The rigid vibration member 21B substantially composed of only carbon has a density of about 0.5 g / cm ³ , a Young's modulus of about 7 GPa, a bending strength of about 25 MPa, and a thickness of about 0.3 mm. It is.

振動 By configuring the vibrating body 21 with a member mainly composed of carbon, it can be made light and thin. Moreover, it is light and has high rigidity with respect to the above-described comparative vibrating body made of the resin member constituting the edge 22. In the illustrated example, the rigid vibration member 21 B includes a foam layer 21 C having a foam structure, and two coating layers 21 D that cover the front and back surfaces of the foam layer 21 C. The coating layer 21D substantially forms a continuous surface. For this reason, by providing the covering layer 21D on the surface of the foam layer 21C, the sound wave propagating from the back side (the magnetic circuit 30 side) of the vibrating body 21 passes through the vibrating body 21 and is emitted in the acoustic radiation direction. Can be suppressed, and the acoustic characteristics can be improved.

[Magnetic circuit structure]
As shown in FIG. 1, the magnetic circuit 30 includes a yoke 33, a magnet 35 supported by the yoke 33, and a plate 34. The yoke 33 includes a bottom surface portion 33 A that is magnetically coupled to the magnet 35, and a bottom surface portion. And a wall 33B standing from 33A. A magnetic gap 30 G is disposed between the plate 34 as the first magnetic pole part 31 and the wall part 33 B of the yoke 33 as the second magnetic pole part 32. In the illustrated example, the bottom surface portion 33A of the yoke 33 has a flat plate shape.

Further, as shown in FIG. 4 which is a sectional view taken along the line X1-X1 of FIG. 1, the magnetic circuit 30 includes a yoke 33, an inner magnet 35A supported by the yoke 33, an outer magnet 35B, and one or more plates 34. I have. The yoke 33 includes a bottom surface portion 33A magnetically coupled to the magnet 35, an inner magnet 35A is disposed inside the voice coil 25, an outer magnet 35B is disposed outside the voice coil 25, and the plate 34 is disposed on the inner side. The first magnetic pole portion 31 is the plate 34 or the inner magnet 35A, and the second magnetic pole portion 32 is the plate or the outer magnet 35B on the outer magnet 35B. In the illustrated example, the plate 34 is the first magnetic pole portion 31, and the outer magnet 35 B is the second magnetic pole portion 32.

FIG. 5 shows the overall configuration of the magnetic circuit (FIG. 5 (a) is a plan view and FIG. 5 (b) is a perspective view). As shown in FIG. 5, a plurality (a pair) of outer magnets (the other magnet) 35 B are disposed at positions facing each other with the inner magnet (one magnet) 35 A interposed therebetween. The yoke 33 includes a plurality of opposing wall portions 33B. An outer magnet (the other magnet) 35B is disposed between the wall portions 33B of the yoke 33 in the circumferential direction, and each outer magnet 35B is magnetically coupled to the bottom surface portion 33A of the yoke 33. Yes.

The orientation of the magnet 35 is formed along the thickness direction of the magnet 35. However, as an example, the magnet 35 may be formed obliquely with respect to the thickness direction as shown in FIG. Here, of the inner magnet 35A or the outer magnet 35B, one of the magnets 35A (35B) has the orientation of the magnet 35A (35B) oriented along the thickness direction of the magnet 35A (35B), and the other magnet 35B. In (35A), the orientation of the magnet 35B (35A) is inclined with respect to the thickness direction of the magnet 35B (35A). In the illustrated example, the outer magnet 35B is oriented obliquely with respect to the thickness direction. However, the orientation of the outer magnet 35B is set to the thickness direction, and the orientation of the inner magnet 35A is made oblique to the thickness direction. May be. When the orientation of the inner magnet 35 A is oblique, for example, a plurality of inner magnets 35 A are arranged in a ring shape on the yoke 33. Further, the orientation of the inner magnet 35A and the outer magnet 35B may be inclined with respect to the thickness direction. In this case, a plurality of rod-like inner magnets 35 A and a rod-like plurality of outer magnets 35 B are arranged on the yoke 33 in a ring shape. Further, the orientation of the inner magnet 35A and the outer magnet 35B may be formed along the thickness direction. In that case, the inner plate is disposed on the inner magnet 35A, and the outer plate is disposed on the outer magnet 35B. In any case, the orientation directions of the inner magnet 35A and the outer magnet 35B are substantially constant in the magnet thickness direction. That is, the orientation direction does not substantially change in the magnet thickness direction. Further, in the illustrated example, the orientation direction of the outer magnet 35B is an obliquely lower right direction, but is not limited thereto. For example, when the orientation of the inner magnet 35A is downward along the thickness direction, the orientation direction of the outer magnet 35B is an obliquely upper left direction. As described above, the orientation of the magnet 35 can be appropriately changed so that the magnetic flux generated from the magnet 35 passes through the magnet 35 and the yoke 33 to form a magnetic loop (closed circuit).

At this time, the magnetic flux generated by the outer magnet (the other magnet) 35B passes through a position away from the yoke 33, and a magnetic gap 30G is formed in the vicinity of the position through which the magnetic flux passes. That is, the magnetic gap 30G is a position where the magnetic flux passes, and is on a part of the yoke 33 that is different from the positions of the outer magnet (the other magnet) 35B as the magnetic pole part and the outer magnet (the other magnet) 35B. It is formed between the magnetic pole part (plate 34) provided in this.

In the illustrated example, the magnetic circuit 30 includes the inner magnet 35A, the outer magnet 35B, the yoke 33, and the plate 34. However, the wall 33B of the yoke 33 may be disposed instead of the outer magnet 35B. I do not care.

When driving the speaker device 1, an audio signal is input to the voice coil 25. As the audio signal is input, Joule heat is generated in the voice coil 25. This Joule heat may increase the temperature in the magnetic circuit 30. Generally, when the temperature in the magnetic circuit increases, the problem of high temperature demagnetization may occur.

Further, when Joule heat is not sufficiently dissipated as radiant heat from the voice coil 25, the temperatures of the voice coil 25 and the lead wire 26 may become relatively high. Generally, when the temperature of the voice coil or the lead wire becomes relatively high, there is a problem that they are disconnected.

Furthermore, the voice coil 25 and the lead wire 26 may be in a high temperature state or a normal temperature state by repeatedly driving the speaker device 1. In an environment where the speaker device 1 is used, the voice coil 25 or the lead wire 26 may be in a low temperature state. Such a cycle of a high temperature state and a normal temperature state or a high temperature state and a low temperature state is repeated, so that a load is generally applied to the voice coil or the lead wire, and there is a concern that the wire breaks.

As an embodiment of the present invention, the heat of the voice coil 25 or the lead wire 26 can be dissipated by propagating it to the structural member of the magnetic circuit 30 or the frame 11 as the stationary part 10, In some cases, it can contribute to the solution of the disconnection problem. Examples of the heat propagation path include a propagation path in the order of the voice coil 25 (including the lead wire 26), the plate 34, the

magnets

35A and 35B, the yoke 33, and the frame 11. Furthermore, a propagation path that propagates from the wall of the yoke 33 to the frame 11 is also conceivable. The heat propagation path is not limited to this, and the heat is transmitted to the constituent member of the magnetic circuit 30 or the constituent member of the vibration unit 20, the other constituent member, or the outside disposed in the vicinity of the voice coil 25 or the lead wire 26. Propagating paths are also conceivable.

Also, since the magnet has a relatively large heat capacity, it can contribute to efficiently transmitting the heat of the voice coil 25 and the lead wire 26. In particular, the magnetic circuit 30 that is a combined type in which the magnetic circuit 30 uses both the inner magnetic type and the outer magnetic type includes an outer magnet with respect to the inner magnetic type magnetic circuit. For this reason, the combined magnetic circuit is larger in terms of the number of magnets and larger in terms of the surface area of the magnets than the internal magnetic type magnetic circuit. At this time, the heat capacity of the entire magnetic circuit 30 may become relatively large, and there may be cases where more heat from the voice coil 25 or the lead wire 26 can be released.

Further, when the magnetic circuit 30 is an outer magnet type or a combination type, the outer diameter of the yoke 33 may be larger than that of the inner magnet type magnetic circuit. At this time, the heat capacity of the entire magnetic circuit 30 may become relatively large, which may contribute greatly to the release of heat from the voice coil 25 or the lead wire 26.

In the example shown in FIG. 5, the outer magnet (the other magnet) 35B has a shape defined by a long axis and a short axis (a rectangular shape that is long in one direction). In addition, the outer magnet (the other magnet) 35B is provided with an orientation discriminating portion 36 formed by the notch 35B1. The orientation discriminating portion 36 (notch portion 35B1) is provided to clearly indicate the orientation direction formed obliquely with respect to the thickness direction. Here, the surface where the notch 35B1 is not formed faces the magnetic gap 30G side. Further, by arranging the surface on which the notch 35B1 is formed on the side of the wall 33B of the yoke 33 and on the outside of the yoke 33, the orientation of the magnet can be arranged along an appropriate direction.

When the outer magnets (the other magnets) 35B and 35B having substantially the same outer shape are used, there is a problem that it is impossible to identify which direction the magnet is oriented. Therefore, an orientation discriminating unit 36 for discriminating the orientation direction is provided in order to identify the orientation direction of the magnet and arrange the other magnet at an appropriate position. The orientation discriminating portion 36 can be formed by the notch 35B1 provided in the magnet 35 as described above, but is not limited thereto, and can also be formed by giving an indication such as an arrow on the surface of the magnet.

As described above, in the magnet 35 in the magnetic circuit 30 of the speaker device 1, the orientation of the first magnet (either the inner magnet 35A or the outer magnet 35B) is in the thickness direction, and the second magnet (outer magnet 35B). And the inner magnet 35A) are oriented obliquely with respect to the thickness direction. The magnetizing direction may be along the orientation of the magnet or may be different from the orientation of the magnet. By using a magnet whose orientation is oblique, it is possible to suppress the occurrence of magnetic leakage (the magnetic flux goes to the yoke 33 below and does not pass through the magnetic gap 30G), and the magnetic flux density in the magnetic gap 30G is relatively large. it can. Further, the peak position of the magnetic flux density in the magnetic gap 30G can be set at a position that is far from the yoke 33 and relatively high. Therefore, even if the magnetic circuit 30G is made thinner, the magnetic circuit 30 having a relatively high magnetic flux density can be used, and the electromagnetic force acting on the voice coil 25 can be made relatively large.

As for the orientation discriminating unit 36, when a magnet having an oblique orientation is used, if a magnet having an orientation in the thickness direction is also used at the same time, it becomes difficult to distinguish the two during production. In addition, it takes unnecessary time to confirm which direction of the magnet is the oblique direction. Therefore, for example, when a magnet whose orientation is oblique is used as the second magnet (outer magnet 35B), a notch 35B1 is provided on the end surface of the second magnet (outer magnet 35B), and a marker for judging the type of the magnet It is said.

[Magnetic circuit mounting structure]
7 to 9 show an attachment structure for attaching the magnetic circuit to the stationary part. 7 is a plan perspective view of a state in which a magnetic circuit is mounted in the stationary part, FIG. 8A is a cross-sectional view taken along the line X2-X2 in FIG. 7, FIG. 8B is a cross-sectional view taken along the line X3-X3 in FIG. These show the back perspective views of the state which attached the magnetic circuit in the stationary part, respectively. The speaker device 1 includes a frame 11 as a stationary portion 10, and the frame 11 includes an outer peripheral cylindrical portion 11A to which a yoke 33 of a magnetic circuit 30 is attached and a bottom surface portion 11B having an opening portion 11B1.

The outer peripheral cylindrical portion 11A of the frame 11 includes one or a plurality of concave portions 11A2 at the lower end portion 11A1. Further, the yoke 33 includes a protruding portion 33C that protrudes in the direction from the bottom surface portion 33A toward the frame 11. A part of the yoke 33 is disposed in the opening 11B1 of the frame 11, and the protrusion 33C of the yoke 33 is disposed in the recess 11A2 of the frame 11, so that the yoke 33 and the frame 11 are attached. The lower surface 33E of the yoke 33 is disposed at the position on the vibrating body 21 side or substantially the same position with respect to the lower surface 11C of the frame 11. The frame 11 can be formed of a resin member or the like.

Between the frame 11 and the outer magnet 35B, there is provided a joining member reservoir 51 in which a joining member 50 for joining the frame 11 and the outer magnet 35B is disposed (collected). The joining member reservoir 51 includes a predetermined gap 52. The gap 52 includes a first gap provided between the projecting portion 11E of the frame 11 and the outer magnet 35B, and a second gap provided between the inner side surface 11D of the frame 11 and the outer magnet 35B. Is done. The frame 11 has an inner side surface 11D as a side surface facing the outer magnet. The protruding portion 11E constituting the first gap protrudes inward from the inner side surface 11D of the frame 11 facing the outer magnet 35B, and is provided on the outer magnet 35B. The second gap is disposed on the yoke 33 side with respect to the first gap, and has a width larger than the width of the first gap in the radial direction. The gap 52 is filled with a joining member 50 that joins the frame 11 and the outer magnet 35B.

Between the magnetic circuit 30 and the frame 11, a passage 37 is provided on the lower surface side of the outer magnet 35B. The passage 37 communicates the gap 52 provided between the frame 11 and the outer magnet 35B with the outside.

In an electronic device equipped with the speaker device 1, there is a limit to the space inside the device. On the back side of the speaker device 1, an external terminal of an electronic device that is in electrical contact with the terminal portion 12 of the speaker device 1 is provided. Here, as a constituent member constituting the magnetic circuit 30, for example, a case is assumed in which the yoke 33 protrudes toward the electronic device side with respect to the frame 11. The yoke 33 is made of a conductive member, and the frame 11 is made of an insulating member such as resin. In this case, electrical contact between the conductive yoke 33 and the external terminal may occur, resulting in a problem that the electronic device may malfunction. In particular, since the speaker device for a mobile phone is relatively small, if the tolerance of the shape of the yoke 33 is large, a part of the yoke 33 may protrude from the frame 11 in some cases. Therefore, by providing the frame 11 with the recess 11A2 and disposing the protrusion 33C of the yoke 33 in the recess 11A2, it is possible to prevent a part of the yoke 33 from protruding. Thereby, the speaker device 1 can be arranged in a predetermined space, and the electronic device can be thinned while avoiding contact between the yoke 33 and the external terminal.

More specifically, the recess 11A2 of the frame 11 is a positioning portion that determines the position of the yoke 33 with respect to the frame 11 in the radial direction. The position of the yoke 33 can be substantially determined by the recess 11A2 of the frame 11. Further, when the speaker device 1 is thinned, it is possible to prevent a part of the yoke 33 from protruding due to a tolerance of the shape of the yoke 33 or the like. In addition, it is possible to suppress malfunction of the electronic device caused by a part of the yoke 33 being in electrical contact with the external terminal. Further, even when other constituent members constituting the magnetic circuit 30 protrude with respect to the frame 11, electrical contact with the external terminal portion can be suppressed.

In the radial direction of the magnetic circuit 30 (direction intersecting with the vibration direction of the voice coil 25), for example, the position of the outer magnet 35B may be adjusted in the radial direction in order to set the magnetic gap 30G to a specified width. . Also, if the outer magnet 35B has a width larger than the desired width (has a tolerance), the outer magnet 35B may not be installed in the frame 11 if the width of the magnetic gap 30G is given priority. In order to solve this problem, a predetermined gap 52 is provided between the frame 11 and the outer magnet 35B. A part of the outer magnet 35 B whose width is substantially the same as the tolerance is disposed in the gap 52. Thereby, the magnetic gap 30G can be set to a specified width. Further, the outer magnet 35 B can be disposed in the frame 11.

In order to join the frame 11 and the outer magnet 35 B, the joining member 50 is filled in the gap 52. A protrusion 11E is provided on the inner side surface 11D of the frame 11. When this joining member 50 is filled, the protrusion 11E can prevent the joining member 50 from leaking above the outer magnet 35B. Further, a predetermined gap serving as a passage 37 communicating with the outside is provided between the frame 11 and the yoke 33. An injection port (dispenser) of an injector for injecting the joining member 50 can be inserted into the passage 37. Further, the joining member 50 can be filled between the frame 11 and the outer magnet 35B.

The frame 11 includes a bottom surface portion 11B that contacts the bottom surface portion 33A of the yoke 33, and an outer peripheral cylindrical portion 11A that surrounds the magnetic circuit 30 and supports the edge 22. A gap 52 is provided between the outer peripheral cylindrical portion 11A of the frame 11 and the second magnet (outer magnet 35B). The gap 52 is filled with the joining member 50, and the frame 11 and the second magnet (outer magnet 35B) are joined. The gap 52 is provided with a predetermined gap on the frame 11 side from the outer peripheral side surface of the second magnet (outer magnet 35B), and the second magnet (outer magnet 35B) in the frame 11 corresponding to the size (tolerance) of the magnet. It is possible to attach a magnetic circuit 30 including

For example, the dimensions of the speaker device 1 mounted on a mobile phone are prescribed in advance. Further, the speaker device 1 needs to make effective use of the specified dimensions in order to satisfy the requirements such as keeping the specified dimensions and relatively increasing the electromagnetic force of the voice coil 25. Further, the position of each component in the speaker device 1 is defined with relatively high accuracy so as to have a prescribed dimension. Therefore, when there are multiple components and there is a tolerance of the components, if the component members are misaligned, the components cannot be placed at the specified positions, or the speaker device exceeds the specified dimensions. There is. Therefore, in order to reduce the deviation due to the tolerances of the constituent members, a concave portion 11A2 is provided in the outer peripheral cylindrical portion 11A of the frame 11 facing the yoke 33, and the protruding portion 33C of the bottom surface portion 33A of the yoke 33 is disposed in the concave portion 11A2. At this time, a part of the yoke 33 corresponding to the tolerance is disposed in the recess 11 A 2 of the frame 11. With such an arrangement, it is possible to reduce the deviation due to the tolerance of the constituent members, and to reduce the thickness of the speaker device 1. Therefore, it becomes possible to arrange other constituent members at a prescribed position and to set the speaker device 1 to a prescribed dimension.

10 (a) and 10 (b) are explanatory views showing another example of the mounting structure of the magnetic circuit. In the example of FIG. 5A, the first magnetic pole portion 31 is formed by the inner plate 34A, the second magnetic pole portion 32 is formed by the outer plate 34B, and a magnetic gap 30G is formed therebetween. When the magnetic circuit 30 is attached to the stationary portion 10, the upper surface of the outer plate 34B is brought into contact with the fixed surface 11E1 formed on the lower surface of the protruding portion 11E of the frame 11. Further, in the example of FIG. 5B, the magnetic circuit 30 is attached to the stationary portion 10 with the upper surface of the yoke 33 abutting against a fixed surface formed on the bottom surface portion 11B of the frame 11. In the example of FIG. 10A, the inner magnet 35A and the outer magnet 35B have substantially the same thickness. Further, the thickness of the outer plate 34B is larger than the thickness of the inner plate 34A. Thus, the outer plate 34B can be provided with a relatively large gap between the outer plate 34B and the edge 22 disposed above the outer plate 34B. In FIG. 10A, the orientation of the inner magnet 35A and the outer magnet 35B may be set in the direction along the thickness direction. In this case, the magnetic gap 30G is substantially formed by the inner plate 34A and the outer plate 34B. In FIG. 10B, the orientation of the outer magnet 35B may be an oblique direction with respect to the thickness direction, and the orientation of the inner magnet 35A may be a direction along the thickness direction. In this case, the magnetic gap 30G is substantially formed by the inner plate 34 and the outer magnet 35B.

[Leader line placement and disconnection suppression]
FIG. 2 shows a cross-sectional view of the voice coil 25 and the lead line 26. A lead wire 26 led out from the lower end 25A of the voice coil 25 and a plurality of terminal portions 12 that electrically connect the voice coil 25 to the outside through the lead wire 26 are provided. The terminal portion 12 is provided on the frame 11. The yoke 33 includes a plurality of wall portions 33B provided upright from the bottom surface portion 33A and a notch portion 33F provided between adjacent wall portions 33B. The lead wire 26 of the voice coil 25 passes through the notch 33F, passes through a lead-out passage 38 provided between the wall 33B of the yoke 33 and the inner side surface 11D of the frame 11 facing the wall 33B. Connected to the terminal portion 12.

As shown in FIG. 7, the plurality of terminal portions 12 provided in the frame 11 are disposed on the one region 25N1 side among the two regions 25N1 and 25N2 defined by the long axis 25L of the voice coil 25. . In the illustrated example, a plurality of leader lines 26 are provided. Further, the lead-out position of the lead-out line 26 led out from the voice coil 25 is arranged on the other region 25N2 side.

That is, a second magnet (outer magnet 35B) is disposed on the yoke 33 outside the voice coil 25. A lead wire 26 is drawn out from the lower end portion 25 A of the voice coil 25. The lead line 26 is routed toward a plurality of terminal portions 12 arranged on one side of two regions separated by a long axis 25L that passes through the central position of the voice coil 25. The lead-out position of the lead-out line 26 is substantially drawn out from the vicinity of the corner of the voice coil 25, specifically, from a plurality of curved portions and straight portions of the voice coil 25. A retracting portion 40 for retracting the lead wire 26 is provided on the bottom surface portion 33 B of the yoke 33 corresponding to the lead position of the lead wire 26. The retracting portion 40 has a concave cross section. The yoke 33 includes a plurality of wall portions 33B, and a notch portion 33F is provided in the yoke 33 between adjacent wall portions 33B. Between the cutout 33F, the wall 33B of the yoke 33, and the inner side surface 11D of the frame 11, a lead-out passage 38 for drawing the lead-out line 26 is formed. A part on the end side of the lead wire 26 is electrically connected to the terminal portion 12 and inputs an audio signal from the outside to the voice coil.

The lead wire 26 of the voice coil 25 has a lead portion 26A that is drawn across the end surface of the voice coil 25 opposite to the vibrating body 21 (see FIG. 2). The magnetic circuit 30 has a bottom surface portion 33A facing the end surface of the voice coil 25 disposed in the magnetic gap 30G, and the bottom surface portion 33A is in contact with the bottom surface portion 33A of the lower end surface 25A of the voice coil 25 or A retracting portion 40 is formed in which the drawer portion 26A retracts when approaching. In other words, the yoke 33 (stationary portion 10) facing the lower end portion 25 A of the voice coil 25 has the retracting portion 40 (the retracting portion 40 of the leading portion 26 A) where the leading portion 26 A of the lead wire 26 led out from the voice coil 25 is retracted. (See FIGS. 2 and 7). The retracting portion 40 where the lead portion 26A is retracted is provided to prevent the voice coil 25 and the yoke 33 from coming into contact with each other due to an external impact, and the lead wire 26 is disconnected. The retracting portion 40 has a concave cross section or is an opening.

[Terminal structure]
11 to 13 are explanatory views showing the structure of the terminal portion. FIG. 13 is a perspective view of a part of the outer peripheral cylindrical portion 11A of the frame 11 as viewed from the magnetic circuit 30 side. The terminal portion 12 includes a first contact portion 12A that contacts an external terminal portion, an elastic support portion 13 that elastically supports the first contact portion 12A with respect to the frame 11, and a lead wire 26 of the voice coil 25. And the second contact portion 12 B that is electrically connected to the frame 11. The frame 11 includes a fixing portion 14 that fixes the terminal portion 12.

The outer peripheral cylindrical portion 11A of the frame 11 includes a locked portion 11A3 to which the end 12C of the first contact portion 12A is locked, and the locked portion 11A3 has a first contact portion 12A below the frame 11. It is restricted to move to. The end portion 12C of the first contact portion 12A is locked to the locked portion 11A3. The end portion 12C of the first contact portion includes a locking portion 12D that is locked to the locked portion 11A3. The locking portion 12D has a shape protruding from the end portion 12C of the first contact portion 12A toward the locked portion 11A3. Further, the locking portion 12D of the first contact portion 12A extends in a direction intersecting the direction in which the first contact portion 12A extends.

The outer peripheral cylindrical portion 11A of the frame 11 includes a storage portion 11A4 that stores the terminal portion 12, and the storage portion 11A4 is a recess formed on the outer side surface 11A5 of the outer peripheral cylindrical portion 11A of the frame 11. The outer peripheral cylinder portion 11 A of the frame 11 includes a movement space 11 A 6 in which the first contact portion 12 A moves along the vibration direction of the voice coil 25.

The locked portion 11A3 provided in the outer peripheral cylindrical portion 11A of the frame 11 can regulate the movement of the first contact portion 12A below the frame 11 (on the mobile phone casing side). On the other hand, when the first contact portion 12A moves, there is a problem that the elastic support portion 13 repeats the bending motion, and the elastic force is reduced. In particular, when the moving width of the first contact portion 12A is large, the elastic force may be further reduced. Therefore, the elastic force of the elastic support part 13 can be maintained over a long period of time by providing the locked part 11A3 and limiting the movement width of the first contact part 12A.

By disposing the terminal portion 12 in the outer peripheral cylindrical portion 11A of the frame 11, the speaker device 1 can be set to a predetermined size and can be reduced in size. The outer peripheral cylindrical portion 11 A of the frame 11 includes a moving space (opening) for the first contact portion 12 A to move along the vibration direction of the voice coil 25. For this reason, even when the external terminal portion approaches the first contact portion 12A, the first contact portion 12A can maintain a good contact state with the external terminal portion while moving. Further, when the external terminal portion is separated from the first contact portion 12A, the contact state is deviated, and the predetermined portion between the external terminal portion and the first contact portion 12A is separated by the locked portion 11A3. Can maintain the distance.

For example, the terminal unit 12 of the speaker device 1 may be electrically connected to a terminal unit (external terminal unit) included in the mobile phone. In this case, the terminal portion 12 also includes the first contact portion 12A, the elastic support portion 13, the second contact portion 12B, and the fixing portion 14 as described above. The first contact portion 12A is in contact with an external terminal portion. The elastic support portion 13 elastically supports the first contact portion 12 A with respect to the frame 11. The second contact portion 12B is electrically connected to the lead wire 26 of the voice coil 25. The fixing part 14 fixes the terminal part 12 to the frame 11. The end portion of the first contact portion 12 A includes a locking portion 12 D that is locked to the frame 11. This latching | locking part 12D controls that the 1st contact part 12A moves below from the flame | frame 11 (the housing | casing side of a mobile telephone). Moreover, the latching | locking part 12D maintains the elasticity of the curved elastic support part 13 over a long period of time. The frame 11 includes a storage portion for storing the terminal portion 12 on the outer side surface 11A5 of the outer peripheral cylindrical portion 11A so that the speaker device 1 can be accommodated in a predetermined size. The frame 11 includes a movement space 11A6 (opening) for the first contact portion 12A to move along the thickness direction of the speaker device 1. The moving space 11A6 includes an opening 11A7 inside the outer peripheral cylindrical portion 11A of the frame 11. The opening portion 11A7 is provided at a position adjacent to the locked portion 113, and the locking portion 11D and a part of the first contact portion 12A move within the opening portion 11A7. The terminal portion 12 is attached to the frame 11 by a fixing portion 14.

[Example of speaker device]
14 and 15 are external perspective views showing the overall configuration of the speaker device 1. As shown in FIG. 14, the edge 22 has a shape defined by the major axis 22L1 and the minor axis 22L2, that is, a rectangular outer shape that is long in one direction. The edge 22 has the first curved portion 23 and the second curved portion 24 as described above, and thus has a convex cross-sectional shape on the side opposite to the acoustic radiation direction. The edge 22 is provided with one or a plurality of protrusions 24E at its corners. The protrusion 24E has a convex cross section on the acoustic radiation side or a convex sectional shape on the opposite side to the acoustic radiation side. The protrusion 24E extends along the radial direction of the edge 22. The protrusion 24E has an outer peripheral portion located on the inner side of the outer peripheral portion 22B (see FIG. 3) of the edge 22, and an inner peripheral portion thereof arranged on the inner side of the inner peripheral portion 22A (see FIG. 3) of the edge 22. The inner peripheral portion 22 A of the edge 22 supports the vibrating body 21.

The speaker device 1 includes a frame 11 as a stationary unit 10, a vibrating unit 20, a magnetic circuit 30, and a protective unit 60 that protects the vibrating body 21. The vibrating unit 20 includes a vibrating body 21 and an edge 22 that supports the vibrating body 21 on a frame. The external shape of the speaker device 1 may be a circle, an ellipse, a track shape or the like regardless of a rectangle.

The protection unit 60 covers a part of the edge 22 and the opening 61 exposes the vibrating body 21. The edge 22 supports the vibrating body 21 on the frame 11 with its inner peripheral portion 22A. A magnetic circuit 30 supported by the frame 11 is disposed on the back side of the vibrating body 21. As shown in FIG. 2, the voice coil 25 is supported by the vibrating body 21 via the inner peripheral portion 22 A of the edge 22. Here, the thickness of the inner periphery 22 A of the edge 22 is smaller than the thickness of a part of the vibrating body 21 connected to the inner periphery 22 A of the edge 22.

The vibrating body 21 is made of a material mainly composed of carbon and has electrical conductivity. The voice coil 25 needs to be attached to the vibrating body 21 via the edge 22 made of an insulating material (resin or the like). The magnetic circuit 30 includes a plate 34, a yoke 33, and a magnet 35. The yoke 33 includes a bottom surface portion 33A and a wall portion 33B erected from the bottom surface portion 33A.

As an example, the magnetic circuit 30 employs an internal / external magnetic type magnetic circuit in which

magnets

35A and 35B are arranged inside and outside the voice coil 25. A first space is provided on the front side (acoustic radiation side) of the vibrating body 21, and a second space is provided on the back side of the vibrating body 21.

The position of the outer peripheral portion 21 A of the vibrating body 21 is disposed in the vicinity of the position of the wall portion 33 B of the yoke 33 in a direction crossing the vibration direction of the voice coil 25. Further, the inner peripheral portion 22 A of the edge 22 is also disposed in the vicinity of the position of the wall portion 33 B of the yoke 33. At this time, since the vibrating body 21 has bending rigidity, when the vibrating body 21 vibrates, the edge 22 can be prevented from coming into contact with the wall portion 33B of the yoke 33, and the inside of the first bending portion 23 included in the edge 22 can be prevented. The position of the peripheral portion 23A or the inner peripheral portion 24A of the second bending portion 24 can be disposed in the vicinity of the position of the wall portion 33B of the yoke 33.

In the example shown in FIG. 16, a part of the edge 22 is interposed between the vibrating body 21 and the voice coil 25, and the inner peripheral part 22 A that is a part of the edge 22 is directed toward the voice coil 25. A convex protrusion 22A1 is provided. In the illustrated example, a rectangular protrusion 22A1 is provided, and the voice coil 25 is fixed to a flat surface (a surface facing the voice coil 25) of the top 22A1a. The protrusion 22A1 can be filled with an adhesive or the like, or can be loaded with a soft member. By providing such a protruding portion 22A1, the position of the voice coil 25 with respect to the magnetic gap 30G can be adjusted. That is, the voice coil 25 can be positioned at a desired position in the magnetic gap 30G by adjusting the height h4 of the protrusion 22A1. Further, by filling or loading the protruding portion 22A1 with an adhesive or the like or a soft member, the protruding portion 22A1 serves as a buffer member, and the impact applied to the voice coil 25 can be prevented from being transmitted to the vibrating body 21. According to this, since the protruding portion 22A1 serves as a buffer against an impact generated when an electronic device including the speaker device falls, even if the vibrating body 21 is made of a ceramic material such as carbon, vibration occurs. Generation | occurrence | production of the crack of the body 21 can be suppressed. Further, when the vibrating body 21 is made of a resin material or the like, the protruding portion 22A1 serves as a buffer material, and damage or deformation of the vibrating body 21 can be suppressed.

Further, if necessary, a spacer is provided on the inner peripheral portion 22A of the edge 22 instead of the protruding portion 22A1, and this spacer is disposed between the inner peripheral portion 22A of the edge 22 and the voice coil 25 so that the edge 22 The voice coil 25 may be attached to the inner peripheral portion 22A of this through a spacer. The spacer may have substantially the same shape as the protruding portion 22A1. The spacer can be made of a resin material or the like.

Further, the inner peripheral portion 22A of the edge 22 may be disposed inside the voice coil 25 and inside the outer peripheral portion of the plate 34 that is the first magnetic pole portion 31. In this case, the inner peripheral portion 22 A is disposed on the plate 34 that is the first magnetic pole portion 31. For this reason, since the inner peripheral portion 22A serves as a buffer material for the plate 34 (first magnetic pole portion 31) against an impact generated when an electronic apparatus including the speaker device falls, the vibrating body 21 is made of a ceramic material such as carbon. Even if it is comprised by, generation | occurrence | production of the crack of the vibrating body 21 can be suppressed. Further, when the vibrating body 21 is made of a resin material or the like, the inner peripheral portion 22A serves as a cushioning material for the plate 34 (first magnetic pole portion 31) and suppresses damage or deformation of the vibrating body 21. be able to. Further, the present invention is not limited to this embodiment, and the inner peripheral portion 22A is arranged inside the voice coil 25 and inside the outer peripheral portion of the plate 34 that is the first magnetic pole portion 31. This may be applied to other embodiments.

Such a speaker device 1 can be used for electronic equipment and in-vehicle use. FIG. 17 is an explanatory diagram showing an application example of the speaker device 1 according to the embodiment of the present invention. For example, the speaker device 1 can be housed in a housing as a mounting member provided in an electronic device 100 such as a mobile phone or a portable information terminal as shown in FIG. In this case, the thickness of the electronic device can be made relatively small.

Also, the speaker device 1 can be used in an automobile 200 as shown in FIG. In particular, the speaker device according to the embodiment of the present invention can be attached to a door panel, ceiling, rear tray, or dashboard as a member to be attached. In this case, the thickness of the member to be attached such as the door panel can be made relatively small, and the boarding space can be made relatively large.

FIG. 18 is an explanatory diagram showing another example of an electronic device that is an application example of the speaker device 1 according to the embodiment of the present invention. The electronic device 101 shown in FIG. 1A is a personal computer (portable type, notebook type, laptop type, etc.), and the electronic device 102 shown in FIG. 1B is a headphone.

The electronic device 101 includes a display unit 101A and an input operation unit 101B, and the input operation unit 101B is a housing that houses the speaker device 1. Both ends of the display unit 101A and the input operation unit 101B are rotatably connected. In the illustrated example, a plurality of speaker devices 1 are provided such that a vibrating body is disposed on the operation surface of the input operation unit 101B. Further, the present invention is not limited to the illustrated example, and the display unit 101 A may be used as a housing, and one or a plurality of speaker devices 1 may be arranged on the side portion or the like.

As the electronic device 102, a pair (a plurality) of

housings

102A and 102A for housing the speaker device 1 are provided, and an arch-shaped connecting portion 102B that connects the

housings

102A and 102A electrically connects the plurality of speaker devices 1. This is a wiring accommodating portion that accommodates wiring to be connected to the cable.

19 to 21 are explanatory views showing examples of mounting the speaker device according to the embodiment of the present invention on an electronic device. FIG. 19 is an overall configuration diagram illustrating an example of mounting on the electronic device 101 described above. In the example shown in the figure, a plurality of housings 110 for housing the speaker device 1 with the vibrating body 21 exposed are provided. Between the

housings

110 and 110, a wiring housing portion 120 for housing wirings for electrically connecting the plurality of speaker devices 1 is provided. The wiring accommodating portion 120 is provided with a terminal portion 121 for electrical connection with an electronic device.

20 (a) is an enlarged perspective view of the A1 portion in FIG. 20, and FIG. 20 (b) is an enlarged sectional view of the A2 portion in FIG. In FIG. 20A, the speaker device 1 including the vibrating body 21 is accommodated in a housing 110, and the housing 110 has a frame (first stationary portion) that supports the vibrating portion (vibrating body 21, edge 22). ) 111 and a cabinet 112 (second stationary portion) that constitutes an air chamber between the casing 110 and the vibrating body 21. The frame 111 includes an outer peripheral cylindrical portion that surrounds the vibrating body 21. Further, an attachment portion 111A for attaching the frame 111 to the casing 110 of the electronic device is provided on the outer peripheral side surface of the outer peripheral cylindrical portion of the frame 111. The cabinet 112 is disposed on the back side of the frame 111 (below the magnetic circuit 30). Note that the casing 110 constituting the electronic device 101 is a frame 111 or a cabinet 112 as a constituent member constituting the speaker device 1. For this reason, the space for providing the speaker device provided in the electronic apparatus and the automobile can be made relatively small, and the size and thickness can be reduced.

In FIG. 20B, the speaker device 1 including the vibrating body 21 is accommodated in a housing 110, and the housing 110 is a frame (first stationary portion) that supports the vibrating portion (vibrating body 21, edge 22). 111). In this example, the housing 110 includes a cabinet 112 arranged on the back side of the frame 111. A ventilation path 111 S is provided between the frame 111 and the yoke 33. In the illustrated example, a gap is provided between the inner side surface of the outer peripheral cylindrical portion 113 of the frame 111 and the outer peripheral side portion of the yoke 33. This gap serves as a ventilation path 111 S that communicates the space between the vibrating body 21 and the magnetic circuit 30 and the space between the magnetic circuit 30 and the cabinet 112. Further, the inside of the frame 111 and the air chamber 112S in the cabinet 112 communicate with each other through the air passage 111S. The air chamber 112 S is provided near the outside of the edge 22 and on the back side of the yoke 33 of the magnetic circuit 30.

FIG. 21 is an explanatory view showing the casing A1 in FIG. 19, where FIG. 21 (a) is an exploded perspective view and FIG. 21 (b) is a rear view of the frame. A yoke 33 of the magnetic circuit 30 is provided on the frame 111 that supports the vibrating body 21 and the edge 22. The aforementioned notches 33F are formed at the four corners of the yoke. The notch 33F corresponds to the air passage 111S. An air chamber 112 S is provided on the side of the cabinet 112 attached to the back side of the frame 111. Further, the space in the frame 111 communicates with the air chamber 112S through the air passage 111S of the frame 111.

Further, the casing 110 includes an inclined surface portion 114 outside the outer peripheral cylindrical portion 113. By providing this inclined surface part 114, the space between the housing | casing 110 and the speaker apparatus 1 can be made comparatively large, and an acoustic characteristic can be improved. The electronic device 101 shown in FIG. 18 includes a sound emitting unit (near the position of the speaker device 1 in FIG. 18) that emits sound waves emitted from the speaker device 1 to the outside. This sound emitting part is formed by providing a plurality of holes in a part of the housing 110. Further, the sound emitting unit communicates the space between the housing 110 and the speaker device 1 with the outside. For this reason, the electronic device 101 includes an air chamber (first air chamber) on the back side of the vibrating body, and an air chamber (second air chamber) on the front side (acoustic radiation side) of the vibrating body. In addition, an acoustic type speaker device can be provided.

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. 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.

PCT / JP2009 / 051646 filed internationally on January 30, 2009, PCT / JP2007 / 065007 filed internationally on July 31, 2007, PCT / JP2007 / 067752 filed internationally on September 12, 2007, US patent application US12 / 670819 with domestic transition date to the United States on January 26, 2010, US patent application US12 / 675079 with domestic transition date to the United States on February 24, 2010, domestic transition date to Europe All the contents described in European Patent Application EP07807159.4 filed on February 23, 2010 and Japanese Patent Application 2010-267805 filed in Japan on November 30, 2010 are incorporated in this application.

Claims

A stationary part, a vibrating part, and a magnetic circuit;
The vibrating part includes a vibrating body, an edge that supports the vibrating body on the stationary part, and a voice coil supported on the vibrating body directly or via another member,
The magnetic circuit includes a magnetic gap composed of a first magnetic pole part and a second magnetic pole part, and a magnet,
The outer periphery of the vibrating body has rigidity and protrudes outside the voice coil,
The outer peripheral portion of the vibrating body is disposed near or outside the position of the second magnetic pole portion in the radial direction,
The edge is disposed on the second magnetic pole portion;
The edge includes a first curved portion that is convex with respect to the acoustic radiation direction, and a concave second curved portion that is continuous with the first curved portion,
The first curved portion is disposed in the vicinity of the second magnetic pole portion;
The second curved portion is disposed outside the first curved portion,
The speaker device according to claim 1, wherein an inner peripheral portion of the first bending portion is coupled to the vibrating body.
The position of the inner peripheral portion of the first curved portion with respect to the second magnetic pole portion in the vibration direction of the voice coil is higher than the position of the inner peripheral portion of the second curved portion with respect to the second magnetic pole portion. The speaker device according to claim 1.
The first bending portion has a top provided between the inner peripheral portion and the outer peripheral portion of the first bending portion,
The speaker device according to claim 2, wherein a top portion of the first bending portion is disposed outside an outer peripheral portion of the vibrating body.
The top of the first bending portion is disposed on the voice coil side with respect to the lower surface of the vibrating body facing the voice coil and in the vicinity of the height of the lower surface of the vibrating body with respect to the magnetic circuit. The speaker device according to claim 3, wherein
The speaker device according to claim 4, wherein an inner peripheral portion of the first bending portion is disposed in the vicinity of a height of a top portion of the first bending portion with respect to the magnetic circuit.
The edge includes a third bending portion on an outer peripheral portion of the second bending portion,
In the cross section of the edge along the direction of acoustic radiation,
The length along the curve of the second curved portion is larger than the length along the curve of the first curved portion,
6. The speaker device according to claim 5, wherein a length along the curve of the first bending portion is larger than a length along the curve of the third bending portion.
The top of the first curved portion is disposed on the second magnetic pole portion,
The position of the top of the first curved portion in the radial direction is near the position of the inner side surface of the second magnetic pole portion or outside the position of the inner side surface of the second magnetic pole portion, and the second The speaker device according to claim 6, wherein the speaker device is disposed inside with respect to a position of an outer side surface of the magnetic pole portion.
The speaker according to claim 7, wherein the position of the outer peripheral portion of the edge in the vibration direction of the voice coil is higher or substantially the same as the position of the inner peripheral portion of the edge. apparatus.
The second curved portion has a top provided between an inner peripheral portion and an outer peripheral portion thereof,
The position of the top of the second curved portion in the radial direction is disposed outside the position of the inner side surface of the second magnetic pole portion,
The speaker device according to claim 8, wherein a position of a top portion of the second bending portion in a vibration direction of the voice coil is provided at a position higher than the second magnetic pole portion.
A distance between the second magnetic pole part and a part of the stationary part that supports the edge in a radial direction is smaller than a distance between an inner peripheral part of the edge and an outer peripheral part of the edge. The speaker device according to claim 5.
The distance between the inner peripheral portion of the second curved portion and the outer peripheral portion of the second curved portion in the radial direction is the second magnetic pole portion and a part of the stationary portion that supports the edge. The speaker device according to claim 10, wherein the speaker device is large with respect to a distance between the two.
The speaker device according to claim 11, wherein the voice coil is connected to the vibrating body via an inner periphery of the edge.
13. The speaker device according to claim 12, wherein a thickness of the inner peripheral portion of the edge is smaller than a thickness of a part of the vibrating body connected to the inner peripheral portion of the edge.
The height of the second magnetic pole part in the vibration direction of the voice coil is provided lower than the height of the first magnetic pole part,
The speaker device according to claim 1, wherein a distance from the vibrating body to the second magnetic pole portion in a vibration direction of the voice coil is larger than a distance from the vibrating body to the first magnetic pole portion.
The speaker device according to claim 14, wherein a bending diameter of the first bending portion is smaller than a bending diameter of the second bending portion, and the first bending portion has bending rigidity.
The speaker device according to claim 15, wherein the position of the inner peripheral portion of the edge in the radial direction is provided inside the position of the outer peripheral portion of the second magnetic pole portion.
The second curved portion includes a reinforcing portion protruding from the surface of the second curved portion along the radial direction thereof.
The reinforcing portion of the second bending portion is disposed between the outer peripheral portion and the inner peripheral portion of the second bending portion and extends to the vicinity of the outer peripheral portion of the first bending portion. The speaker device according to claim 15, characterized in that:
The magnetic circuit includes a yoke, a magnet supported by the yoke, and a plate,
The yoke includes a bottom portion magnetically coupled to the magnet, and a wall portion standing from the bottom portion,
18. The magnetic gap according to claim 17, wherein the magnetic gap is disposed between the plate as the first magnetic pole part and a wall part of the yoke as the second magnetic pole part. Speaker device.
The magnetic circuit comprises a yoke, an inner magnet supported by the yoke, an outer magnet, one or more plates,
The yoke includes a bottom surface portion magnetically coupled to the magnet,
The inner magnet is arranged inside the voice coil, the outer magnet is arranged outside the voice coil,
The plate is disposed on one of the inner magnet or the outer magnet;
The first magnetic pole portion is the plate or the inner magnet;
The speaker device according to claim 17, wherein the second magnetic pole portion is the plate or the outer magnet.
18. The speaker device according to claim 17, wherein the yoke facing the lower end portion of the voice coil is provided with a retracting portion for retracting a lead-out portion of a lead wire drawn from the voice coil.
Of the inner magnet or the outer magnet, one of the magnets has an orientation direction of the magnet along the thickness direction of the magnet,
In the other magnet, the orientation direction of the magnet is an oblique direction with respect to the thickness direction of the magnet,
The speaker device according to claim 19, wherein the orientation directions of the inner magnet and the outer magnet are substantially constant in the thickness direction of the magnet.
The magnetic flux generated by the other magnet passes through a position away from the yoke,
The speaker device according to claim 21, wherein the magnetic gap is formed at a position through which the magnetic flux passes.
The other magnet has a shape defined by a major axis and a minor axis,
The speaker device according to claim 22, wherein the other magnet is provided with an orientation determination unit.
24. The speaker device according to claim 23, wherein the plurality of other magnets are arranged at positions facing each other with the one magnet interposed therebetween.
The yoke includes a plurality of opposing wall portions,
25. The speaker device according to claim 24, wherein the other magnet is magnetically coupled to a bottom surface of the yoke between wall portions of the yoke in a circumferential direction.
A frame as the stationary part;
The frame includes an outer peripheral cylinder portion to which the yoke is attached, and a bottom surface portion having an opening,
The outer peripheral cylindrical portion of the frame is provided with one or a plurality of concave portions at the lower end portion thereof,
The yoke includes a protruding portion that protrudes in a direction from the bottom surface portion of the yoke toward the frame;
A portion of the yoke is disposed in the opening of the frame, and the protruding portion of the yoke is disposed in the recess of the frame;
26. The speaker device according to claim 25, wherein the yoke and the frame are attached.
27. The speaker device according to claim 26, wherein a lower surface of the yoke is disposed at a position on the vibrating body side or substantially the same position with respect to a lower surface of the frame.
28. The speaker device according to claim 27, wherein the frame is a resin member.
The frame includes an inner side surface of the frame facing the outer magnet, a projecting portion that projects from the inner side surface toward the inner side, and is provided on the outer magnet.
Between the frame and the outer magnet, a joining member reservoir for arranging a joining member for joining the frame and the outer magnet is provided,
The joining member reservoir is
A first gap provided between the protrusion and the outer magnet;
29. The speaker device according to claim 28, further comprising a second gap provided on the yoke side of the projecting portion of the frame and between the inner side surface of the frame and the outer magnet.
30. The speaker device according to claim 29, wherein a joining member that joins the frame and the outer magnet is provided in the first gap and the second gap.
Between the magnetic circuit and the frame, there is provided a passage disposed on the lower surface side of the outer magnet,
31. The speaker device according to claim 30, wherein the passage communicates a gap provided between the frame and the outer magnet and the outside.
Comprising a terminal part supported by the frame, the yoke comprising a plurality of wall parts erected from the bottom part and a notch part provided between the adjacent wall parts;
The lead wire of the voice coil passes through the notch,
32. The speaker according to claim 31, wherein the speaker is connected to the terminal portion through a lead-out passage provided between a wall portion of the yoke and an inner side surface of the frame facing the wall portion. apparatus.
A lead wire led out from the lower end of the voice coil, and a plurality of terminal portions that electrically connect the voice coil to the outside via the lead wire,
The speaker device according to claim 32, wherein the plurality of terminal portions are arranged on one of the two regions defined by the major axis of the voice coil.
A plurality of the leader lines are provided,
34. The speaker device according to claim 33, wherein the lead-out positions of the plurality of lead lines drawn out from the voice coil are arranged on the other region side.
A lead-out portion where the lead-out line of the voice coil is drawn out across the end surface of the voice coil opposite to the vibrating body side;
The magnetic circuit has a bottom surface facing an end surface of the voice coil disposed in the magnetic gap;
The speaker device according to claim 1, wherein a retraction portion of the drawing portion is provided on a bottom surface of the magnetic circuit.
The terminal portion is electrically connected to a first contact portion that contacts an external terminal portion, an elastic support portion that elastically supports the first contact portion with respect to the frame, and a lead wire of the voice coil. A second contact portion to be provided,
The speaker device according to claim 34, wherein the frame includes a fixing portion that fixes the terminal portion.
The outer peripheral cylindrical portion of the frame includes a locked portion to which an end of the first contact portion is locked,
The speaker device according to claim 36, wherein the locked portion restricts the first contact portion from moving below the frame.
The outer peripheral cylindrical portion of the frame includes a storage portion that stores the terminal portion,
38. The speaker device according to claim 37, wherein the storage portion is a recess formed in an outer side surface of an outer peripheral cylindrical portion of the frame.
The speaker device according to claim 38, wherein the outer peripheral cylindrical portion of the frame includes a moving space in which the first contact portion moves along a vibration direction of the voice coil.
The vibrator includes a rigid vibration member having rigidity,
The speaker device according to claim 39, wherein the rigid vibration member is substantially made of a ceramic material.
The rigid vibration member is substantially made of carbon,
The rigid vibration member has a foam layer having a foam structure, and a coating layer covering the foam layer,
41. The speaker device according to claim 40, wherein the covering layer is a continuously formed layer.
The edge is made of a resin member,
The vibration body having the rigid vibration member has substantially the same shape as the vibration body, is composed of polyetherimide, has a density of about 1.27 g / cm 3 , and a Young's modulus of about 4 MPa. 42. The speaker device according to claim 41, wherein the speaker device has a small density and a large rigidity with respect to the body.
42. The speaker device according to claim 41, wherein a thickness of the vibrating body is smaller than a total height of the edge.
44. The size obtained by dividing the Young's modulus of the vibrating body by the density is larger than the size obtained by dividing the Young's modulus of the comparative vibrating body by the density. Speaker device.
The speaker device according to claim 44, wherein the rigid vibration member has a density of about 0.5 g / cm 3 , a Young's modulus of about 7 GPa, a bending strength of about 25 MPa, and a thickness of about 0.3 mm. .
An electronic apparatus comprising the speaker device according to claim 1.
An automobile comprising the speaker device according to claim 1.