JP2011244211A - Speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker having an excellent input resistance performance and bass sound reproduction capability, and capable of reducing the size, thickness and width without increasing the component cost and manufacturing cost.SOLUTION: A speaker 1 comprises: a diaphragm 2; a frame 6 arranged from the outer peripheral side to the rear of the diaphragm 2; an edge 3 of which the inner periphery is joined to the diaphragm 2 and of which the outer periphery is joined to the frame 6; a magnetic circuit 7 arranged in the rear of the diaphragm 2; and a voice coil bobbin 4 for vibrating the diaphragm 2; and a voice coil 4a which is wound along the outer peripheral surface of the voice coil bobbin 4 and is supported in a magnetic gap of the magnetic circuit 7. The speaker comprises: a structure 11 joined to the rear face of the diaphragm 2, and joined to the frame 6 and the magnetic circuit 7. The structure 11 includes a side face which is joined to a side face of the frame 6 so as to be flush with each other.

Description

  The present invention relates to a speaker.

  Speakers are widely used not only in home audio equipment and in-vehicle audio equipment, but also in personal computers, mobile phones, game machines, and various electronic devices. Electronic devices are becoming lighter, thinner, and smaller, and speakers are also required to be smaller, thinner, and higher performance. For higher performance, in addition to excellent sound quality, high input resistance is required.

  The electronic device is required to have a high input resistance despite being an elongated shape because the installation space of the speaker is limited. An elongated speaker has a short diameter dimension, and therefore cannot have a large voice coil diameter, which is disadvantageous for input resistance. If the voice coil diameter is increased without changing the short diameter dimension of the speaker, the edge width is reduced accordingly, the amplitude of the diaphragm is limited, and as a result, the input resistance cannot be increased. Further, when the edge width is narrowed, the minimum resonance frequency is also increased, and the reproduction capability in the low band is deteriorated.

  FIG. 8 is a cross-sectional view of a conventional elongated speaker 21, showing the cross-sectional structure of the short diameter side of the speaker 21 on the left side and the cross-sectional structure of the long diameter side on the right side. 8 includes a frame 22, a magnetic circuit 23 coupled to the frame 22, a voice coil 24 supported in the magnetic gap of the magnetic circuit 23, and an outer peripheral portion fixed to the frame 22 via an edge 25. A vibration plate 26 that vibrates in the vertical direction together with the voice coil 24, a damper 27 whose inner periphery is fixed to the voice coil 24 and whose outer periphery is fixed to the frame 22, and a center cap 28 that covers the front of the voice coil 24. It has.

  In the speaker 21 of FIG. 8, when the diameter of the voice coil 24 is increased in order to achieve a high input resistance, the width of the edge 25 on the short diameter side becomes narrower, the minimum resonance frequency increases, and the reproduction capability in the low range is increased. It will deteriorate. There exists patent document 1 as an example which solves such a problem.

  FIG. 9 is a diagram showing the structure of the elongated speaker 31 described in Patent Document 1. In FIG. FIG. 9A is a cross-sectional view of the speaker 31, and FIG. 9B is a perspective view of the main part of the speaker 31. In FIG. 9A, the cross-sectional structure on the short diameter side of the speaker 31 is shown on the left side, and the cross-sectional structure on the long diameter side is shown on the right side, as in FIG.

  The voice coil 32 of the speaker 31 in FIG. 9 is arranged on the short diameter side outside the inner periphery of the edge 33, so that the edge 33 and the voice coil 32 are not in contact with each other at the front end portion of the voice coil 32. The part 35 is cut away. Therefore, the diameter of the voice coil 32 can be increased without reducing the width of the edge 33 on the short diameter side, and high input resistance can be ensured.

  Another example of solving the above problem is Patent Document 2. FIG. 10 is a cross-sectional view of the speaker 41 described in Patent Document 2. As shown in FIG. In the speaker 41 of FIG. 10, the diameter of the voice coil bobbin 43 is made larger than the diameter of the diaphragm (center dome) 42, and an expansion member 44 is disposed between the voice coil bobbin 43 and the diaphragm 42. The inner peripheral portion of the edge (outer peripheral dome) 45 is joined.

  In the speaker 41 of FIG. 10, by providing the expansion member 44, even if the diameter of the voice coil bobbin 43 is increased, it is not necessary to reduce the width of the edge 45 and the input resistance can be increased.

  Another example of solving the above problem is Patent Document 3. FIG. 11 is an exploded perspective view showing the structure of the speaker 51 described in Patent Document 3. As shown in FIG. The speaker 51 of FIG. 11 includes an elongated diaphragm 52, a plurality of magnetic circuits 53 arranged in parallel along the longitudinal direction of the diaphragm 52, and a diaphragm 52 arranged on the front side of these magnetic circuits 53. And a plurality of voice coils 56 inserted into the magnetic gap 55 of the magnetic circuit 53 and fixed to the corresponding support 54. .

Japanese Patent No. 3956485 JP 2006-31156 A Japanese Patent Laid-Open No. 9-261795

  However, in Patent Document 1, processing for cutting out the front end portion of the voice coil 32 is required, and the workability of the speaker 31 is deteriorated because the voice coil 32 has directionality when the speaker 31 is assembled. These can cause an increase in component costs and manufacturing costs.

  Further, in Patent Document 2, since the shape of the expansion member 44 is a substantially elongated voice coil shape and is a flat ring shape, it cannot be applied to an elongated speaker using a normal round voice coil. There's a problem. Further, Patent Document 2 is a micro speaker without a damper and has a problem that the low-frequency reproduction capability is inferior.

  On the other hand, in Patent Document 3, a plurality of voice coils 56 are juxtaposed along the longitudinal direction of the diaphragm 52, but an integral structure damper is provided inside the frame 57. For this reason, there is a limit to narrowing the speaker. In the speaker of Patent Document 3, the voice coil 56 and the diaphragm 52 are coupled by the support body 54, but the outer dimensions of the support body 54 and the voice coil 56 are smaller than the outer dimension of the diaphragm 52. There are limits to improving input. Further, since a square (non-circular) voice coil is used, the cost increases.

  The present invention has been made in order to solve the above-described problems, and its object is to reduce the size, the thickness, and the width of the device with excellent input resistance and bass reproduction capability without increasing the component cost and manufacturing cost. An object of the present invention is to provide a speaker that can be widened.

In order to solve the above problems, in one embodiment of the present invention, a diaphragm;
A frame arranged from the outer peripheral side of the diaphragm to the rear;
An inner edge is bonded to the diaphragm, and an outer edge is bonded to the frame;
A magnetic circuit disposed behind the diaphragm;
A voice coil bobbin that vibrates the diaphragm;
A voice coil wound around an outer peripheral surface of the voice coil bobbin and supported in a magnetic gap of the magnetic circuit,
A structure that is bonded to the back surface of the diaphragm and bonded to the frame and the magnetic circuit,
The structure has a side surface joined substantially flush with a side surface of the frame,
A speaker is provided in which the outer diameter of the voice coil bobbin is larger than the outer diameter of the diaphragm in the short direction.

  According to the present invention, it is possible to provide a speaker that is excellent in input resistance and bass reproduction capability and can be reduced in size, thickness, and width without increasing component costs and manufacturing costs.

1 is an exploded perspective view of a speaker 1 according to an embodiment of the present invention. (A) is a top view of the speaker of FIG. 1, (b) is the sectional view on the AA line of (a). The perspective view of a structure. (A)-(d) is a figure explaining the process sequence which assembles | attaches a 1st member and a 2nd member, and produces a structure. The flowchart which shows an example of the manufacturing process sequence of the speaker which concerns on this embodiment. The flowchart which shows an example of the manufacturing process order different from FIG. The disassembled perspective view which shows an example of the speaker which integrally molded the 2nd member with the flame | frame. Sectional drawing of the conventional elongated speaker 21. FIG. (A) is sectional drawing of the elongate speaker 31 described in patent document 1, FIG.9 (b) is a perspective view of the principal part of the speaker 31. FIG. Sectional drawing of the speaker 41 described in patent document 2. FIG. The exploded perspective view which shows the structure of the speaker described in patent document 3. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an exploded perspective view of a speaker 1 according to an embodiment of the present invention. FIG. 1 shows an example in which four magnetic circuits 7 and two diaphragms 2 are used.

  The speaker 1 includes an elongated diaphragm 2, an elongated annular edge 3 disposed so as to surround the diaphragm 2, a voice coil bobbin 4 that vibrates the diaphragm 2, and an outer peripheral surface of the voice coil bobbin 4. A wound voice coil 4a, a frame 6, and a magnetic circuit 7 are provided.

  The edge 3 has an inner peripheral portion joined to the diaphragm 2 and an outer peripheral portion joined to the frame 6. The frame 6 is disposed from the outer peripheral side of the diaphragm 2 to the rear.

  The magnetic circuit 7 is disposed behind the diaphragm 2, and the voice coil 4 a is held in the magnetic gap of the magnetic circuit 7. The magnetic circuit 7 includes a pot yoke 8 joined to the inner periphery of the frame 6, a magnet 9 disposed inside the pot yoke 8, and a pole piece 10 disposed on the front surface of the magnet 9.

  In addition, the speaker 1 of FIG. 1 includes a structure 11 that is bonded to the back surface of the diaphragm 2 and bonded to the frame 6 and the magnetic circuit 7. The structure 11 includes a first member 11a and a second member 11b that can be assembled to each other.

  2A and 2B are a plan view and a cross-sectional view of the speaker 1 of FIG. 1, FIG. 2A is a plan view, and FIG. 2B is a cross-sectional view taken along line AA of FIG. FIG. 3 is a perspective view of the structure 11 and shows a state in which the first member 11a and the second member 11b are assembled.

  As shown in FIG. 3, the first member 11 a in the structure 11 is connected to the back surface of the diaphragm 2 and is joined to the coupling member 11 c joined to the voice coil bobbin 4 and one end to the joining member 11 c. And a plurality of damper portions 11d. The second member 11b in the structure 11 is disposed behind the first member 11a and joined to the frame 6, and the side surface 11g of the second member 11b is substantially flush with the side surface 6a of the frame 6. It is joined to.

  The coupling member 11c in the first member 11a has a front stage part 11e joined to the back surface side of the diaphragm 2, and a rear stage part 11f joined to the voice coil bobbin 4 and integrally formed with the front stage part 11e. The front portion 11 e has an annular shape in which the diameter in the direction along the longitudinal direction of the speaker 11 is larger than the diameter in the direction along the short direction of the speaker 11. The rear stage portion 11f has an annular shape with a substantially equal diameter. As can be seen from FIG. 3, in the short direction of the speaker 11, the diameter of the rear stage part 11f is larger than the diameter of the front stage part 11e, and in the longitudinal direction of the speaker 11, the diameter of the front stage part 11e is larger than the diameter of the rear stage part 11f. Slightly larger than.

  As shown in FIG. 2B, the front part 11 e of the coupling member 11 c is joined to the diaphragm 2, and the rear part 11 f is joined to the voice coil bobbin 4. Thus, the diaphragm 2 and the voice coil bobbin 4 are fixed to each other via the coupling member 11c.

  In FIG. 2A, the outer diameter of the voice coil bobbin 4 is shown by a broken line. As can be seen from the size of this broken line, the outer diameter of the voice coil bobbin 4 is larger than the outer diameter of the diaphragm 2 in the short direction.

  When the voice coil bobbin 4 and the diaphragm 2 are joined to the coupling member 11c, for example, an adhesive member may be attached to at least one of the voice coil bobbin 4, the diaphragm 2 and the coupling member 11c, and both may be joined. In addition, a specific joining form is not ask | required.

  As shown in FIG. 1, the diaphragm 2 is formed with three concave portions 2a along the longitudinal direction thereof. Further, as shown in FIG. 2B, a rib 2 b extending rearward is formed on the outer peripheral edge of the diaphragm 2. The front step portion 11e of the coupling member 11c is joined to the side surface portions of the two adjacent concave portions 2a of the diaphragm 2 and the inner peripheral surface of the rib 2b between the concave portions 2a. The front surface of the front step portion 11e of the coupling member 11c is formed according to the shape of the diaphragm 2, and the front surface of the front step portion 11e is in surface contact with the back surface of the vibration plate 2. Further, the inner peripheral surface of the rear stage portion 11 f of the coupling member 11 c is joined to the outer peripheral surface of the voice coil bobbin 4.

  In the present embodiment, as shown in FIG. 2B, the inner peripheral surface of the rear stage portion 11f of the coupling member 11c is joined to the outer peripheral surface of the voice coil bobbin 4, but the outer peripheral surface of the rear stage portion 11f of the coupling member 11c. May be joined to the inner peripheral surface of the voice coil bobbin 4.

  The material of the coupling member 11c is not particularly limited, but a lightweight and hard member is desirable, and for example, a resin or the like is used. For example, an adhesive is used for joining the front stage part 11e of the coupling member 11c and the diaphragm 2 and joining the rear stage part 11f and the voice coil bobbin 4.

  The concave portion 2a and the rib 2b of the diaphragm 2 are formed of a single member that is integrally formed. For example, paper or resin is used as the material of this member, but the material is not particularly limited.

  As shown in FIG. 2B, the diaphragm 2 has a gently curved shape in the short direction, and the center line in the short direction projects most forward.

  An edge 3 is joined to the outer peripheral side of the front surface of the diaphragm 2. The inner peripheral portion of the edge 3 is joined to the diaphragm 2 inside the outer peripheral edge portion of the diaphragm 2. 2B, the voice coil bobbin 4 joined to the rear stage portion 11f of the coupling member 11c is larger than the inner diameter of the edge 3. As shown in FIG. Further, the outer peripheral edge of the voice coil bobbin 4 is not in contact with the edge 3. Therefore, the outer diameter of the voice coil bobbin 4 can be made larger than the inner diameter of the edge 3.

  A recess 6b is formed on the side surface on the short diameter side of the frame 6, and the side surface of the second member 11b in the structure 11 is fitted into the recess 6b (see FIG. 2B). In the present embodiment, since the width dimension of the second member 11b on the short axis side of the speaker 1 is substantially equal to the width dimension on the short axis side of the frame 6, the second member 11b is disposed in the recess 6b of the frame 6. When fitted, the side surface of the frame 6 and the side surface of the second member 11b are substantially flush. Accordingly, the second member 11b does not protrude outward from the side surface on the short diameter side of the frame 6, and the width dimension on the short diameter side of the speaker 1 can be shortened.

  Thus, one of the technical features of this embodiment is that the side surface 11g of the structure 11 is joined to the side surface 6a of the frame 6 substantially flush with each other.

  FIG. 4 is a diagram for explaining a process sequence for fabricating the structure 11 by assembling the first member 11a and the second member 11b. First, the 1st member 11a shown to Fig.4 (a) is prepared. The first member 11a has a structure in which the coupling member 11c is supported by the four damper portions 11d and these damper portions 11d are supported by the frame body portion 11h. Similarly, a second member 11b shown in FIG. 4B is prepared. As described above, the second member 11b has two opposing side surfaces, and the width dimension between these side surfaces is substantially equal to the width dimension of the side surface of the frame 6 on the short diameter side of the speaker 1.

  Next, as shown in FIG.4 (c), the 1st member 11a and the 2nd member 11b are assembled | attached. Two opposing side surfaces 11g of the second member 11b are structured to be fitted inside the frame body portion 11h of the first member 11a. Next, as shown in FIG. 4D, the four ribs 11i connecting the damper and the frame body portion 11h are removed, and the frame body portion 11h is removed. Thereby, the structure 11 is completed.

  FIG. 5 is a flowchart showing an example of the manufacturing process sequence of the speaker 1 according to this embodiment. First, the diaphragm 2 is mounted on the frame 6 using a positioning jig (not shown) (step S1). Here, it is assumed that an edge is attached to the diaphragm 2 in advance.

  Next, the voice coil bobbin 4 around which the voice coil is wound is bonded and fixed to the structure 11 in which the first member 11a and the second member 11b are assembled (step S2). Next, the structure 11 to which the voice coil bobbin 4 is bonded and fixed is bonded and fixed to the frame 6 (step S3). Since the frame 6 has a positioning structure so that the structure 11 can be bonded and fixed only at a predetermined position, the structure 11 is fitted at a predetermined position of the frame 6 without using a jig or the like. As a result, the side surface 11g of the second member 11b is fitted into the recess 6b of the side surface 6a on the short diameter side of the speaker 1 of the frame 6, so that the side surface 6a of the frame 6 and the side surface 11g of the second member 11b are substantially surface. Become one.

  Next, a magnetic circuit composed of the pot yoke 8, the magnet 9 and the pole piece 10 is bonded and fixed to the structure 11 from the rear side of the frame 6 (step S4).

  As described above, the positioning of the structure 11 and the frame 6 is easy, and the structure 11 is integrally formed with the damper, so that a step of separately installing the damper is not required, and the manufacturing and assembly work is performed. Improves.

  FIG. 5 illustrates an example in which the voice coil bobbin 4 is bonded and fixed after the first member 11a and the second member 11b are assembled to produce the structure 11, but the manufacturing process sequence of the speaker 1 is not necessarily shown in FIG. It is not limited to that.

  FIG. 6 is a flowchart showing an example of a manufacturing process sequence different from FIG. First, as in step S1, the diaphragm 2 is mounted on the frame 6 using a positioning jig (step S11). Next, with the voice coil bobbin 4 around which the voice coil 4a is wound and the second member 11b being set on the assembly jig, the first member 11a is mounted from above. And the rib 11i of the 1st member 11a is cut | disconnected, and the frame part 11h is removed (step S12). Thereby, a structure in which the voice coil bobbin 4 is joined to the structure 11 is obtained.

  Next, the side surface 11g of the second member 11b in the structure 11 is joined to the recess 6b of the frame 6 to which the diaphragm 2 is joined (step S13). Next, the magnetic circuit 7 including the pot yoke 8, the magnet 9, and the pole piece 10 is bonded and fixed to the structure 11 from the rear side of the frame 6 (step S14).

  5 and 6, the side surface of the second member 11 b in the structure 11 can be flush with the side surface of the frame 6 on the short diameter side of the speaker 1. The width dimension can be shortened.

  The structure 11 shown in FIG. 3 and FIG. 4 has a coupling member 11c having a shape with the back surface side attached to the diaphragm 2 having a convex shape in mind, but according to the shape of the back surface side of the diaphragm 2 By changing the shape of the front part 11e of the coupling member 11c, the structure 11 that can be bonded and fixed to the diaphragm 2 having various shapes can be produced.

  Although the front-stage part 11e of the coupling member 11c in the structure 11 shown in FIGS. 1-4 is cyclic | annular, a strip | belt shape may be sufficient instead of cyclic | annular form. For example, a groove may be formed in the front stage portion 11e along the shape of the rib of the diaphragm 2, and the rib may be fitted into this groove. In this case, the groove of the front portion 11e is not formed in a ring shape but is formed in a band shape.

  Moreover, although the voice coil bobbin 4 shown in FIGS. 1-2 is a cylindrical shape, the voice coil bobbin 4 does not necessarily need to be a cylindrical shape, and various shapes, such as an ellipse and a rectangle, are applicable for the cross-sectional shape.

  3 and 4, the example in which the structure 11 is manufactured by assembling the first member 11a and the second member 11b has been described. However, at least one of the first member 11a and the second member 11b is used. It may be formed integrally with the frame 6. FIG. 7 is an exploded perspective view showing an example of the speaker 1 a in which the second member 11 b is integrally formed with the frame 6.

  The second member 11b of the structure 11 is formed integrally with the frame 6 in FIG. 7, and the second member 11b is formed on the inner side of the side surface of the frame 6 on the short axis side of the speaker. The voice coil bobbin 4 around which the voice coil 4a is wound is bonded and fixed to the first member 11a of the structure 11, and the front portion 11e of the first member 11a is bonded and fixed to the back surface of the diaphragm 2. The member 11 a is fitted into the second member 11 b in the frame 6. A magnetic circuit 7 is attached from the rear side of the frame 6.

  Thus, by integrally molding the second member 11b on the frame 6, the manufacturing process of the speaker 1a is simplified and the workability is improved. Since the speaker 1a of FIG. 7 integrally molds the second member 11b to the frame 6 so that the side surface 6a of the frame 6 on the short axis side of the speaker and the side surface 11g of the second member 11b are flush with each other, The step of forming the concave portion 6b on the side surface 6a of the second member 11b and the step of fitting the side surface of the second member 11b into the concave portion 6b become unnecessary, and the workability is further improved.

  On the other hand, the first member 11a may be integrally formed with the frame 6 instead of the second member 11b, or both the first member 11a and the second member 11b may be integrally formed with the frame 6. .

  In FIG. 4, the example in which the first member 11a and the second member 11b are assembled to produce the structural body 11 has been described. However, the structure 11 is not divided into the first member 11a and the second member 11b, but is integrated into FIG. The structure 11 having the structure may be formed. In this case, the manufacturing process for assembling the first member 11a and the second member 11b as shown in FIG. 4 becomes unnecessary.

  As described above, in the present embodiment, when the structure 11 having the coupling member 11 c is bonded and fixed to the frame 6, the side surface of the structure 11 is flush with the side surface of the frame 6 on the short axis side of the speaker. Therefore, the width dimension on the short axis side of the speaker can be shortened.

  In particular, when the structure 11 is manufactured by assembling the first member 11 a having the coupling member 11 c and the second member 11 b, the side surface 11 g on the short axis side of the second member 11 b is connected to the speaker short of the frame 6. The diameter can be made substantially flush with the side surface 6a on the radial side, and there is no possibility that the second member 11b protrudes outward from the width dimension of the side surface of the frame 6 on the short axis side of the speaker.

  Further, since the concave portion 6b is formed in the side surface 6a of the speaker 6 on the short axis side of the frame 6 and the side surface 11g of the second member 11b is fitted into the concave portion 6b, the thickness in the depth direction of the speaker 1a can be reduced. The speaker 1a can be realized.

  In the above-described embodiment, the example in which the four structures 11 are incorporated in the frame 6 has been described. However, the number of the structures 11 incorporated in one frame 6 is not particularly limited. In the above-described embodiment, an example in which three concave portions 2a are formed in one diaphragm 2 and two structures 11 are incorporated therebetween is described. However, the shape of the diaphragm 2 and one vibration There is no particular limitation on the number of structures 11 incorporated in the plate 2.

  In the above-described embodiment, the voice coil bobbin 4 and the voice coil 4a are circular. However, the voice coil bobbin 4 and the voice coil 4a may have a rectangular shape with rounded corners, or a track shape (circular arcs are connected to both ends of two parallel straight lines, respectively. Shape) or other shapes, and the specific shape is not limited.

  The aspect of the present invention is not limited to the individual embodiments described above, and includes various modifications that can be conceived by those skilled in the art, and the effects of the present invention are not limited to the contents described above. That is, various additions, modifications, and partial deletions can be made without departing from the concept and spirit of the present invention derived from the contents defined in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 1,1a Speaker 2 Diaphragm 3 Edge 4 Voice coil bobbin 4a Voice coil 6 Frame 7 Magnetic circuit 8 Pot yoke 9 Magnet 10 Pole piece 11 Structure 11a 1st member 11b 2nd member 11c Connection member 11d Damper part 11e Front part 11f latter part

Claims (8)

A diaphragm,
A frame arranged from the outer peripheral side of the diaphragm to the rear;
An inner edge is bonded to the diaphragm, and an outer edge is bonded to the frame;
A magnetic circuit disposed behind the diaphragm;
A voice coil bobbin that vibrates the diaphragm;
A voice coil wound around an outer peripheral surface of the voice coil bobbin and supported in a magnetic gap of the magnetic circuit,
A structure that is bonded to the back surface of the diaphragm and bonded to the frame and the magnetic circuit,
The structure has a side surface joined substantially flush with a side surface of the frame,
The speaker according to claim 1, wherein an outer diameter of the voice coil bobbin is larger than an outer diameter of the diaphragm in a short direction.   The speaker according to claim 1, wherein the side surface of the structure is joined substantially flush with a side surface on a short diameter side of the frame. The structure includes a first member and a second member that can be assembled to each other,
The first member is integrally formed with a joining member joined to the voice coil bobbin and a plurality of damper portions each joined to the joining member while being joined to the back surface of the diaphragm. Is,
The speaker according to claim 1, wherein the second member has a side surface disposed behind the first member and joined substantially flush with a side surface of the frame. A notch is formed in a part of the side surface of the frame joined substantially flush with the side surface of the second member,
4. The speaker according to claim 3, wherein the side surface of the second member is joined to the cutout portion so as to be substantially flush with the side surface of the frame.   The speaker according to claim 3 or 4, wherein the structure is formed by integrally forming the first member and the second member. The structure, the magnetic circuit, and the voice coil bobbin are provided in plurality,
Each of the plurality of structures is joined to the frame along the longitudinal direction of the frame,
6. The speaker according to claim 1, wherein each of the plurality of magnetic circuits and the voice coil bobbin is joined to the corresponding structure. The coupling member has a front stage part joined to the back side of the diaphragm, and a rear stage part joined to the voice coil bobbin and integrally formed with the front stage part,
The front part is an annular or belt-like member joined to the back surface of the diaphragm,
The said back | latter stage part is a cyclic | annular member joined to the outer peripheral surface or inner peripheral surface of the upper end part of the said voice coil bobbin in the internal peripheral surface or outer peripheral surface. Speaker.   The speaker according to claim 1, wherein the voice coil bobbin has a circular shape, a rectangular shape with rounded corners, or a track shape.

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