JP2011124821A - Speaker frame and dynamic speaker using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker frame, which is united with a drain cover and formed of resin materials, of light weight, has superior sound reproduction capability and is suitable for installation to vehicles, and to provide a dynamic speaker using the same. <P>SOLUTION: The speaker frame has a ring-shaped part which has an edge fixing unit to fix the outer edge side of an edge, a magnetic circuit fixing unit which fixes a magnetic circuit, a drain cover which is extended from the ring-shaped part, a plurality of first connections which connect the magnetic circuit fixing unit with the ring-shaped part, and a plurality of second connections which connect the magnetic circuit fixing unit with the drain cover. In the speaker frame, the connection between the ring-shaped part and the first connections is arranged more forward than the magnetic circuit fixing unit, and the connection between the drain cover and the second connections is arranged more backward than the magnetic circuit fixing unit. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrodynamic speaker including a frame made of a resin material integrated with a drain cover, and more particularly, to a speaker frame that is lightweight and rigid and suitable for mounting on a vehicle such as an automobile, and an electrodynamic speaker using the same. .

  In a speaker attached to a vehicle such as an automobile, it is desired to reduce the size and weight of a speaker that reproduces sound from the viewpoint of energy saving. In particular, in an electrodynamic speaker having a magnetic circuit, the magnetic circuit may be reduced in size and weight, and the frame attached to the magnetic circuit may be reduced in weight. The speaker frame supports the speaker diaphragm so as to vibrate and forms an attachment portion to the vehicle. There is a speaker attached to a vehicle in which a drain cover is formed integrally with a resin frame on which resin such as ABS is injection-molded.

  If the resin frame that integrates the drain cover is made lighter and its skeleton is made thin or thin, unnecessary vibration will occur due to insufficient rigidity required to attach a heavy magnetic circuit, or drain Due to the lack of rigidity of the cover, there may be a problem that the frame is damaged when the speaker is attached to the vehicle or when a large impact is applied to the vehicle. Therefore, conventionally, various frames and electrodynamic speakers using the same have been proposed in order to solve these problems.

  Conventionally, a magnetic circuit in which a magnetic gap is formed, a frame that is provided with an arcuate standing wall on at least the upper and lower sides on the back side in the attached state, and coupled to the upper surface of the magnetic circuit, and fits in the magnetic gap There is a speaker composed of a diaphragm that is coupled around a voice coil and has an outer peripheral portion coupled to the periphery of the frame. (Patent Document 1).

  In addition, a magnetic coil, a frame formed by resin molding coupled to the magnetic circuit, and a voice coil in which the outer periphery is adhesively bonded to the frame, and the inner periphery is disposed below the magnetic gap of the magnetic circuit. A speaker formed by an adhesively bonded diaphragm, an inner periphery adhesively bonded to the voice coil, and an outer periphery adhesively bonded to the frame to support the voice coil in a vertically movable manner, There is a speaker in which polygonal ribs are integrally provided at the time of resin molding at a portion of the frame excluding at least a coupling portion with the magnetic circuit. (Patent Document 2).

Japanese Patent No. 3327014 (FIGS. 1 to 6) JP 2008-193371 A (FIGS. 1 to 3)

  However, it is desired to further reduce the weight of the speaker frame. When using a resin frame to reduce the weight of the speaker, if the mounting part of the frame to the vehicle is molded with resin, it will be higher due to mounting screws or the like around the mounting hole defined by the thinly formed mounting part Pressure may be applied, resulting in problems such as breakage of the mounting portion. On the other hand, if the frame and the drain cover are thick and the rigidity is increased, there is a problem that the weight reduction may not be sufficient. If the rigidity of the entire frame is insufficient, there is a problem that the result is an electrodynamic speaker with inferior sound reproduction capability.

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a frame made of a resin material in which a drain cover is integrated, and an electrodynamic speaker including the frame. Another object of the present invention is to provide a speaker frame that is excellent in sound reproduction capability and suitable for mounting on a vehicle such as an automobile, and an electrodynamic speaker using the same.

  The speaker frame of the present invention includes an annular portion having an edge fixing portion for fixing the outer peripheral end of the edge, a magnetic circuit fixing portion for fixing a magnetic circuit, a drain cover portion extending from the annular portion, and a magnetic circuit A plurality of first connecting parts for connecting the fixing part and the annular part; and a plurality of second connecting parts for connecting the magnetic circuit fixing part and the drain cover part.

  In the speaker frame of the present invention, the connecting portion between the annular portion and the first connecting portion is disposed in front of the magnetic circuit fixing portion, and the connecting portion between the drain cover portion and the second connecting portion is the magnetic circuit fixing portion. It is arranged more rearward.

  The speaker frame of the present invention is arranged such that the first connecting portion and the second connecting portion alternately appear in the circumferential direction around the magnetic circuit fixing portion.

  Preferably, in the speaker frame of the present invention, the annular portion or the drain cover portion further includes a plurality of attachment portions that define the attachment holes, and the magnetic circuit fixing portion further includes a damper fixing portion that fixes the outer peripheral portion of the damper. Prepare.

  The electrodynamic speaker according to the present invention includes a speaker frame, a magnetic circuit fixed to the magnetic circuit fixing portion, a voice coil having a coil disposed in a magnetic gap of the magnetic circuit, A speaker diaphragm connected on the side, and an edge connected to an outer peripheral end side of the speaker diaphragm and an edge fixing portion of the annular portion.

  The electrodynamic speaker of the present invention further includes a damper connected to the damper fixing portion of the voice coil and the speaker frame.

  The operation of the present invention will be described below.

  The speaker frame of the present invention is a basket-like frame formed of a resin material with which a drain cover is integrated, and has an annular shape having an edge fixing portion for fixing the outer peripheral end side of the speaker diaphragm or the edge on the front outer peripheral side. A plurality of sections, a magnetic circuit fixing section that fixes a magnetic circuit on the inner peripheral side of the back surface, a drain wall-shaped drain cover portion that extends from the annular portion to the back surface side, and a plurality of connecting the magnetic circuit fixing portion and the annular portion And a plurality of second connecting portions for connecting the magnetic circuit fixing portion and the rear end portion of the drain cover portion. The magnetic circuit fixing portion of the speaker frame may further include a damper fixing portion that fixes the outer peripheral portion of the damper, and the annular portion or the drain cover portion further includes a plurality of mounting portions that define mounting holes. It may be.

  An electrodynamic speaker using the speaker frame of the present invention includes a magnetic circuit fixed to a magnetic circuit fixing portion of the speaker frame, a voice coil having a coil disposed in a magnetic gap of the magnetic circuit, and a voice coil. A speaker diaphragm coupled on the center side; and an edge coupled to an outer peripheral end side of the speaker diaphragm and an edge fixing portion of the annular portion. Furthermore, you may provide the damper connected with a voice coil and a damper fixing | fixed part. The speaker circuit magnetic circuit fixing portion, the annular portion, and the plurality of first connecting portions and second connecting portions form a window portion which is a through hole, and a speaker vibration system including a speaker diaphragm and a voice coil is provided. Exposed from the window.

  In the speaker frame of the present invention, the vertical wall-shaped drain cover portion extending from the annular portion to the back side is attached to the magnetic circuit fixing portion when the speaker frame is attached to a vehicle or the like, or Cover the speaker vibration system exposed from the window so that it will not be exposed to rainwater. A connecting portion between the annular portion and the first connecting portion is disposed in front of the magnetic circuit fixing portion, and a connecting portion between the drain cover portion and the second connecting portion is disposed behind the magnetic circuit fixing portion. As described above, since the first connecting portion and the second connecting portion extend from the magnetic circuit fixing portion in the front-rear direction and are connected to the rear end portion of the annular portion or the drain cover portion, for the speaker including the drain cover portion. The rigidity of the frame can be increased and the weight can be reduced. In the speaker frame in which the first connecting portion and the second connecting portion are arranged so as to alternately appear in the circumferential direction around the magnetic circuit fixing portion, the resonance and deformation of the drain cover portion are suppressed. Further, the rigidity can be increased.

  An electrodynamic speaker having a frame made of a resin material in which a drain cover is integrated is provided. The speaker frame is lightweight, excellent in sound reproduction capability, and suitable for mounting on a vehicle such as an automobile, and an electrodynamic speaker using the same. can do.

It is sectional drawing explaining the electrodynamic speaker 1 by preferable embodiment of this invention. Example 1 It is sectional drawing explaining the structure of the flame | frame 10 for speakers by preferable embodiment of this invention. Example 1 It is a perspective view explaining the structure of the flame | frame 10 for speakers by preferable embodiment of this invention. Example 1 It is a figure explaining the rigidity with respect to the load in the frame 10 for speakers by preferable embodiment of this invention, and the frame 100 for speakers of a comparative example. (Example 1, Comparative Example 1)

  Hereinafter, although the magnetic circuit for speakers and the electrodynamic speaker according to preferred embodiments of the present invention will be described, the present invention is not limited to these embodiments.

  FIG. 1 is a diagram illustrating an electrodynamic speaker 1 according to a preferred embodiment of the present invention. 2 and 3 are diagrams for explaining the configuration of the speaker frame 10 constituting the electrodynamic speaker 1. Specifically, FIG. 1 is a cross-sectional view of the electrodynamic speaker 1 corresponding to an OA cross section in which the right half side is omitted from the central axis (not shown) passing through the central point O in FIG. 2 is an OB cross-sectional view of the speaker frame 10. FIG. 3 is a perspective view of the speaker frame 10 as viewed from the back side to which the magnetic circuit is attached, and the front side to which the speaker diaphragm 2 is attached is illustrated on the back side of FIG. As will be described later, a part of the structure of the electrodynamic speaker 1, the internal structure, and the like are omitted.

  The electrodynamic speaker 1 of the present embodiment is an electrodynamic speaker having a circular speaker diaphragm 2 having a diameter of about 16 cm, and is used for a vehicle that is reduced in weight so as to be attached to a vehicle body (not shown). It is a speaker. The cone-shaped speaker diaphragm 2 is supported at its outer peripheral edge by an edge 3. The speaker diaphragm 2 of the present embodiment is a paper material to be made of paper, but may be composed of other materials. The outer peripheral end of the roll-shaped edge 3 is fixed to a resin frame 10, and a gasket 20 is attached to the front side thereof. The inner peripheral end of the edge 3 is connected to the outer peripheral end of the speaker diaphragm. A voice coil 4 is connected to the center of the speaker diaphragm 2 from the back side. The voice coil 4 is supported by a damper 5 so that the coil bobbin can vibrate. The damper 5 is a corrugation damper that is formed by impregnating a phenol resin with a woven fabric of flexible fibers as a base material, and an outer peripheral end thereof is fixed to the frame 10.

  The voice coil 4 has a coil wound around one end of a cylindrical coil bobbin, and this coil is disposed in a magnetic gap of a magnetic circuit fixed to the frame 10. The tinsel wire (not shown) connected to the voice coil 4 is electrically connected by soldering a terminal (not shown) fixed to the frame 10 and a lead wire of the coil 4 from the terminal, so that the voice coil 4 A current can be supplied. The tinsel wire may be electrically connected to the terminal by providing a metal eyelet on the speaker diaphragm 2. Since the dust cap 9 is attached to the center side of the speaker diaphragm 2 with an adhesive, the magnetic gap of the magnetic circuit and the end of the coil bobbin of the voice coil 4 are blocked so that dust such as iron powder does not enter. ing.

  The magnetic circuit of the present embodiment includes a stepped bowl-shaped yoke 6, a disk-shaped magnet 7 fixed inside the yoke 6, a disk-shaped top plate 8 fixed on the upper surface side of the magnet 7, The flange portion of the yoke 6 is fixed to the resin frame 10. The magnetic circuit forms a DC magnetic field having a high magnetic flux density in an annular magnetic gap defined between the inner peripheral end of the yoke 6 and the top plate 8. Therefore, when an audio current is supplied to the coil of the voice coil 4 disposed in the magnetic gap, a driving force acts on the voice coil 4 to vibrate the speaker diaphragm 2. Therefore, the electrodynamic speaker 1 can convert an audio signal current into a sound wave.

  The frame 10 is a speaker frame formed from ABS alloy resin. The frame 10 has an overall weight of about 105 g, and is lightweight as a speaker frame having a diameter of 16 cm formed from a resin material with which the drain cover is integrated. The frame 10 includes an annular portion 11 formed on the outer peripheral side of the front surface, a magnetic circuit fixing portion 12 formed on the inner peripheral side of the rear surface with respect to the annular portion 11, and a standing wall shape extending from the annular portion 11 to the rear side. The drain cover portion 13, the three first connecting portions 15 that connect the magnetic circuit fixing portion 12 and the annular portion 11, and the three first connecting portions that connect the magnetic circuit fixing portion 12 and the rear end portion of the drain cover portion 13. 2 is a substantially basket-like speaker frame including two connecting portions 16. From the vicinity of the center of the drain cover portion 13, the flange 14 is formed so as to protrude outward in the radial direction over the entire circumference, and the flange 14 formed integrally with the drain cover portion 13 includes Three attachment portions 14a for defining attachment holes as shown in the figure attached to the vehicle body are formed.

  The annular portion 11 of the frame 10 has an edge fixing portion 17 that fixes the outer peripheral end side of the edge 3 to which the speaker diaphragm 2 is connected. The magnetic circuit fixing portion 12 to which the magnetic circuit of the frame 10 is fixed has a center hole that communicates with the magnetic gap of the magnetic circuit, and a damper fixing portion 18 that fixes the outer peripheral portion of the damper 5. The edge fixing portion 17 and the damper fixing portion 18 are annular plane portions that bond the edge and the damper, respectively.

  Further, the drain cover portion 13 is a standing wall-like portion extending from the annular portion 11 to the back side, and forms a cylindrical drain cover that is partially cut away as shown in FIG. To do. As shown in FIG. 2, the drain cover portion 13 of the frame 10 has a terminal connecting portion 19 for connecting terminals (not shown). Further, a gasket 20 that protects the speaker vibration system including the speaker diaphragm 2 and the edge 3 is attached to the front side of the annular portion 11 of the frame 10.

  The first connecting portion 15 is a columnar portion having a U-shaped cross section that connects the magnetic circuit fixing portion 12 and the annular portion 11, and has an interval of about 120 degrees in the circumferential direction around the center point O. Three are provided. Since the annular portion 11 is disposed on the front side of the frame 10 when viewed from the magnetic circuit fixing portion 12, the first connecting portion 15 extends from the magnetic circuit fixing portion 12 toward the annular portion 11 on the front side. It becomes a structure. Therefore, the first connecting portion 15 has a connecting portion 15 a to the annular portion 11 disposed on the front side of the frame 10 with respect to the magnetic circuit fixing portion 12.

  On the other hand, the second connecting portion 16 is a columnar portion having a U-shaped cross section that connects the magnetic circuit fixing portion 12 and the rear end side of the drain cover portion 13, and has a center point O as the center. Three are provided at intervals of about 120 degrees in the circumferential direction. Since the drain cover portion 13 extends from the annular portion 11 of the frame 10 to the back side when viewed from the magnetic circuit fixing portion 12, the second connecting portion 16 extends from the magnetic circuit fixing portion 12 to the drain cover portion 13 on the back side. It becomes the structure extended so that it may face. Therefore, the second connecting portion 16 has a connecting portion 16 a with the drain cover portion 13 disposed on the rear side of the frame 10 with respect to the magnetic circuit fixing portion 12.

  In the frame 10, as illustrated in FIG. 3, the first connecting portion 15 and the second connecting portion 16 appear alternately at intervals of about 60 degrees in the circumferential direction around the magnetic circuit fixing portion 12. Has been placed. Therefore, the magnetic circuit fixing portion 12 of the frame 10, the annular portion 11, each first connecting portion 15, and the adjacent second connecting portion 16 form a window portion that is a through hole. Although the speaker vibration system including the speaker diaphragm 2, the voice coil 4, and the damper 5 is exposed from these window portions of the frame 10, the drain cover portion 13 is provided with a substantially cylindrical drain cover portion 13. 13 can cover the magnetic circuit composed of the yoke 6 or the like attached to the magnetic circuit fixing portion 12 or the speaker vibration system exposed from the window portion so as not to be exposed to rainwater.

  Thus, in the frame 10, the first connecting portion 15 and the second connecting portion 16 extend from the magnetic circuit fixing portion 12 in the front-rear direction, and are connected to the rear end portion of the annular portion 11 or the drain cover portion 13. The rigidity including the drain cover portion 13 can be increased. Since the first connecting portion 15 and the second connecting portion 16 are arranged so as to alternately appear in the circumferential direction around the magnetic circuit fixing portion 12, the resonance of the drain cover portion 13 formed to be thin, In addition, the deformation can be suppressed and the rigidity can be further increased. In the frame 10 of this embodiment, since the connecting portion 15a of the first connecting portion 15 and the connecting portion 16a of the second connecting portion 16 are arranged in the front-rear direction of the magnetic circuit fixing portion 12, high rigidity is obtained from the structure. The average thickness can be reduced, or partial meat theft can be increased. As a result, the frame 10 of the present embodiment can be reduced in weight compared to the conventional case.

  FIG. 4 is a diagram for explaining the rigidity with respect to the load in the speaker frame 10 of this embodiment and the speaker frame 100 of the comparative example. Specifically, FIG. 4A shows that the attachment portion 14a1 of the frame 10 of the present embodiment is fixed so as to be completely restrained by a fixing portion such as a vehicle body, and is attached to the other attachment portion 14a2 by about 1.2N. It is a figure which shows the displacement amount of a deformation | transformation of the flame | frame 10 when the vertical load of is applied. 4B shows that the frame 100 of the comparative example is similarly fixed so that the mounting portion 140a1 is completely restrained to a fixing portion such as a vehicle body, and about 1.2N is attached to the other mounting portion 140a2. It is a figure which shows the displacement amount of a deformation | transformation of the flame | frame 100 when a vertical load is applied. In FIG. 4, the shade of the color of the frame represents the absolute value of the displacement amount, and the displacement amount is exaggerated by about 10 times so that the degree of deformation of the frame can be easily understood.

  The frame 100 of the comparative example connects the annular portion having substantially the same shape and dimension as the frame 10 of the present embodiment, the magnetic circuit fixing portion, the drain cover portion, and the magnetic circuit fixing portion and the annular portion. And a connecting portion. The frame 100 of the comparative example is a speaker frame formed from ABS resin, and the total weight is about 105 g. The difference between the frame 10 of this embodiment and the frame 100 of the comparative example is that the frame 10 of this embodiment connects the three second connecting portions 16 that connect the magnetic circuit fixing portion 12 and the rear end portion of the drain cover portion 13. The frame 100 of the comparative example is provided with three connecting portions that connect the magnetic circuit fixing portion and the annular portion similar to the other connecting portions. Therefore, in the frame 100 of the comparative example, the six connecting portions extend only in the forward direction from the magnetic circuit fixing portion and are connected to the annular portion. For comparison, the cross-sectional shape size of the second connecting portion 16 of the frame 10 is substantially the same as the cross-sectional shape size of the connecting portion of the frame 100, and the weight is also substantially the same.

  In the case of the frame 10 of this embodiment, as shown in FIG. 4A, the deformation at the attachment portion 14a2 to which a large vertical load is applied is the largest, and the maximum displacement amount is about 1.78 mm. On the other hand, no significant deformation is found in the drain cover portion 13. In addition, the largest stress is applied in the vicinity of the fixing portion 14a1 to be fixed, and the maximum stress value is about 5.36 Mpa. Lowering the maximum stress value applied to the frame 10 means that the structure is less likely to break or break even when a large force is applied.

  On the other hand, in the case of the frame 100 of the comparative example, as shown in FIG. 4B, the deformation at the mounting portion 140a2 to which a large vertical load is applied is the largest, and the maximum displacement amount is about 2.03 mm. It can be seen that the frame is deformed more greatly than in the case of the frame 10 of this embodiment. Further, the drain cover portion 130 of the comparative example has a remarkable deformation that was not found in the case of the frame 10 of the present embodiment. Further, when the largest stress is applied in the vicinity of the fixing portion 140a1 to be fixed, the maximum stress value becomes about 5.52 Mpa, and the maximum stress value becomes larger than that in the case of the frame 10 of the present embodiment.

  Therefore, in the frame 10 of the present embodiment, a structure that is less likely to break than the frame 100 of the comparative example can be realized when a larger force is applied. Thus, in the frame 10 of the present embodiment, high rigidity can be obtained from the structure, and therefore, some of the reinforcing ribs and the like necessary for obtaining the same rigidity as in the case of the comparative example are obtained. Since it can also be removed, as a result, the weight can be reduced in the range of about 8 to 15 g as compared with the conventional case.

  In the frame 10 of the present embodiment, the three first connecting portions 15 and the three second connecting portions 16 appear alternately at intervals of about 60 degrees in the circumferential direction around the magnetic circuit fixing portion 12. However, the number and arrangement of the plurality of first connecting portions 15 and the second connecting portions 16 are not limited to the above-described embodiment. The plurality of first connecting parts 15 and the second connecting parts 16 may be at least two or more, and may be four or five, respectively, and is not limited to the same number. The interval at which the first connecting portion 15 and the second connecting portion 16 are arranged is not limited to the case where they are arranged at substantially equal angles in the circumferential direction.

  In addition, the resin frame for a speaker according to the present invention is arranged such that the first connecting portions 15 are partially adjacent to each other, or the second connecting portions 16 are partially adjacent to each other. The case is also included. In the frame 10 of the present embodiment, the connecting portion 15a of the first connecting portion 15 and the connecting portion 16a of the second connecting portion 16 may be disposed in the front-rear direction of the magnetic circuit fixing portion 12. As in the frame 10 of the present embodiment, the first connecting portion 15 that connects the magnetic circuit fixing portion 12 and the annular portion 11, and the rear end portion side that connects the magnetic circuit fixing portion 12 and the drain cover portion 13. If the two connecting portions 16 are arranged so as to alternately appear in the circumferential direction around the magnetic circuit fixing portion 12, it is preferable because the rigidity of the resin frame can be further increased.

  Further, the electrodynamic speaker 1 using the frame 10 of this embodiment is an electrodynamic speaker for a vehicle having a circular speaker diaphragm 2. However, the speaker diaphragm 2 having an oval or rectangular outer diameter. Even a frame having an oval shape or a rectangular annular portion suitable for the above may be a resin frame provided with a drain cover. Even if a drain cover is provided, the required rigidity can be maintained and the weight of the vehicle can be reduced.

  The speaker frame and the electrodynamic speaker using the same according to the present invention reproduce not only an electrodynamic speaker attached to a vehicle that requires a drain cover but also a speaker incorporated in a video / audio device such as a display or sound. The present invention can also be applied to a game machine having a cabinet with a built-in speaker and a game machine such as a slot machine.

DESCRIPTION OF SYMBOLS 1 Electrodynamic type speaker 2 Speaker diaphragm 3 Edge 4 Voice coil 5 Damper 6 Yoke 7 Magnet 8 Top plate 9 Dust cap 10, 100 Frame 11 Annular part 12 Magnetic circuit fixing | fixed part 13 Drain cover part 14 Flange 15 1st connection part 16 Second connecting portion 17 Edge fixing portion 18 Damper fixing portion 19 Terminal connecting portion 20 Gasket

Claims (6)

An annular part having an edge fixing part for fixing the outer peripheral end side of the edge, a magnetic circuit fixing part for fixing a magnetic circuit, a drain cover part extending from the annular part, the magnetic circuit fixing part and the annular part A plurality of first connection portions for connecting the magnetic circuit fixing portion and the drain cover portion, and a plurality of second connection portions for connecting the drain cover portion.
Speaker frame. A connecting portion between the annular portion and the first connecting portion is disposed in front of the magnetic circuit fixing portion, and a connecting portion between the drain cover portion and the second connecting portion is disposed behind the magnetic circuit fixing portion. Being
The speaker frame according to claim 1. The first connecting part and the second connecting part are arranged so as to alternately appear in the circumferential direction around the magnetic circuit fixing part,
The speaker frame according to claim 1 or 2. The annular portion or the drain cover portion further includes a plurality of attachment portions that define attachment holes,
The magnetic circuit fixing portion further includes a damper fixing portion that fixes an outer peripheral portion of the damper.
The speaker frame according to any one of claims 1 to 3. A speaker frame according to any one of claims 1 to 4,
The magnetic circuit fixed to the magnetic circuit fixing unit;
A voice coil having a coil disposed in a magnetic gap of the magnetic circuit;
A speaker diaphragm connected to the voice coil on the center side;
An edge connected to the outer peripheral end side of the speaker diaphragm and the edge fixing portion of the annular portion;
An electrodynamic type speaker. A damper connected to the damper fixing portion of the voice coil and the speaker frame;
The electrodynamic speaker according to claim 5.