Electroacoustic transducer and method for manufacturing electroacoustic transducer

Abstract

To attach a damper to a bobbin.SOLUTION: An electroacoustic transducer 100 comprises: a cylindrical bobbin 110; a voice coil 120 wound around one end of the bobbin 110; magnetic circuit 170 having a tubular magnetic gap in which the voice coil 120 is disposed; a frame 130 to which the magnetic circuit 170 is attached; a diaphragm 140 coupled to the bobbin 110 and the frame 130; a flange part 150 projecting outward from an outer peripheral surface of the bobbin 110 between the voice coil 120 and the diaphragm 140; and a damper 160 that is connected to an outer peripheral surface of the flange part 150 and is connected to the magnetic circuit 170 or the frame 130.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to electro-acoustic transducers such as speakers that convert electrical signals into sound and microphones that convert sound into electrical signals. [Background technology]

[0002] Conventionally, there exists a speaker in which a damper is connected to a bobbin to which a voice coil is attached, as described in Patent Document 1. Furthermore, Patent Document 2 describes a speaker in which the bobbin and damper are integrally molded. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-307993 [Patent Document 1] Japanese Patent Application Publication No. 2-248200 Summary of the Invention [Problem to be solved by the invention]

[0004] However, connecting the bobbin and damper is sometimes done manually, which makes the process of determining the damper's installation position tedious. If the bobbin and damper are molded as a single unit, manual work is not necessary, but because the functions required of the bobbin and the damper are molded from the same material, even though they are contradictory, it is often difficult to obtain the characteristics required of a speaker.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and provides an electro-acoustic transducer in which a damper can be easily attached to a bobbin. [Means for solving the problem]

[0006] The electro-acoustic transducer according to the present disclosure comprises a cylindrical bobbin, a voice coil wound around one end of the bobbin, a magnetic circuit having a tubular magnetic gap in which the voice coil is disposed, a frame to which the magnetic circuit is attached, a diaphragm coupled to the bobbin and the frame, a flange portion protruding outward from the outer peripheral surface of the bobbin between the voice coil and the diaphragm, and a damper connected to the outer peripheral surface of the flange portion and connected to the magnetic circuit or the frame.

[0007] The method for manufacturing an electro-acoustic transducer according to the present disclosure is a method for manufacturing an electro-acoustic transducer comprising: a cylindrical bobbin; a voice coil wound around one end of the bobbin; a magnetic circuit having a tubular magnetic gap in which the voice coil is disposed; a frame to which the magnetic circuit is attached; a diaphragm coupled to the bobbin and the frame; a flange portion protruding outward from the outer circumferential surface of the bobbin between the voice coil and the diaphragm; and a damper connected to the outer circumferential surface of the flange portion and connected to the magnetic circuit or the frame, wherein the damper is formed by filling a gap between a first mold portion and a second mold portion that are arranged to sandwich the entire circumference of the flange portion in the winding axis direction of the voice coil with resin. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to easily attach the damper to the bobbin via the flange portion. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a cross-sectional view showing the internal structure of an electroacoustic transducer. [Figure 2] FIG. 2 is a perspective view showing the bobbin, the voice coil, the flange portion, and the damper in an assembled state. [Figure 3] FIG. 2 is a cross-sectional view showing the bobbin, the voice coil, the flange portion, and the damper in an assembled state. [Figure 4]10A and 10B are diagrams showing a first step of connecting the damper and a flange portion while molding the damper by injection molding; [Figure 5] 10A and 10B are diagrams showing a second step of connecting the damper and the flange portion while molding the damper by injection molding; [Figure 6] 10A and 10B are diagrams showing a third step of connecting the damper and the flange portion while molding the damper by injection molding. [Figure 7] 10 is a view showing, from another angle, the first step of connecting the damper and the flange portion while molding the damper by injection molding. FIG. [Figure 8] FIG. 10 is a perspective view showing another example of a damper. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of an electroacoustic transducer and a method for manufacturing an electroacoustic transducer according to the present invention will be described with reference to the drawings. Note that the following embodiments are presented as examples to explain the present invention and are not intended to limit the present invention. For example, the shapes, structures, materials, components, relative positional relationships, connection states, numerical values, mathematical formulas, the content of each step in the method, and the order of each step shown in the following embodiments are merely examples and may include content not described below. Furthermore, while geometric expressions such as parallel and orthogonal may be used, these expressions do not indicate mathematical rigor and include substantially acceptable errors, deviations, and the like. Furthermore, expressions such as simultaneous and identical also include substantially acceptable ranges.

[0011] The drawings are schematic diagrams in which emphasis, omission, or adjustment of proportions is appropriately made for the purpose of explaining the present invention, and differ from the actual shapes, positional relationships, and proportions. The X-axis, Y-axis, and Z-axis shown in the drawings represent Cartesian coordinates arbitrarily set for the purpose of explaining the drawings. In other words, the Z-axis is not necessarily an axis along the vertical direction, and the X-axis and Y-axis are not necessarily located within a horizontal plane.

[0012] In addition, in the following, multiple inventions may be collectively described as one embodiment, and some of the contents described below may be described as optional components related to the present invention.

[0013] FIG. 1 is a cross-sectional view showing the internal structure of an electroacoustic transducer 100. In this embodiment, a speaker, which is one type of electroacoustic transducer 100, will be described. A speaker, which is one type of electroacoustic transducer 100, is a device that generates sound based on an input electrical signal and includes a bobbin 110, a voice coil 120, a frame 130, a diaphragm 140, a flange portion 150, and a damper 160. In this embodiment, the electroacoustic transducer 100 is exemplified as a speaker attached to a moving body such as an automobile. The electroacoustic transducer 100 is a compact electroacoustic transducer 100 that can be embedded in a limited space within the moving body. Note that, in this specification, the term "compact" may be used to refer to an electroacoustic transducer 100 in which the diameter of the diaphragm 140 is 10 cm or less. Note that the use and size of the electroacoustic transducer 100 are not limited to those described above.

[0014] Fig. 2 is a perspective view showing the bobbin 110, voice coil 120, flange portion 150, and damper 160 in an assembled state. Fig. 3 is a cross-sectional view showing the bobbin 110, voice coil 120, flange portion 150, and damper 160 in an assembled state. The bobbin 110 is a cylindrical member that holds the voice coil 120 wound around the outer peripheral surface of one end and is connected to the diaphragm 140 at the outer peripheral surface of the other end. The shape, structure, material, etc. of the bobbin 110 are not limited, but in this embodiment, the bobbin 110 includes an inner member 111, a first outer member 112, and a second outer member 113.

[0015] The inner member 111 is a thin, cylindrical member. Examples of materials for the inner member 111 include relatively lightweight metals such as aluminum and aluminum alloys, and resins such as polyimide. In the winding axis direction of the voice coil 120 (the Z-axis direction in the drawing), at least one of the inner member 111 and the second outer member 113 (both in this embodiment) has a mark 114, such as a notch or a hole, at a portion in the circumferential direction that is different from the other portions. The diaphragm 140 is attached to the outer peripheral surface of the bobbin 110 between the mark 114 and the flange portion 150. Therefore, even if the mark 114 is structurally different from the other portions in the circumferential direction, the mark 114 does not adversely affect the connection between the diaphragm 140 and the bobbin 110.

[0016] The first outer member 112 is a cylindrical member that is arranged on the outer peripheral surface side of the inner member 111 and closer to the voice coil 120 than the second outer member 113. A connecting member 121 is wired between the first outer member 112 and the inner member 111. The connecting member 121 is a conductor that is electrically connected to both ends of the voice coil 120. The connecting member 121 is wired so as to pass between the inner member 111 and the first outer member 112 and pass through the gap between the first outer member 112 and the second outer member 113.

[0017] In the present embodiment, the connecting member 121 is inserted into the damper 160 and protrudes outward from the outer periphery of the damper 160. The first outer member 112 also covers a connection portion 122 between the voice coil 120 and the connecting member 121. The connection portion 122 is, for example, a portion where a pair of ends of the voice coil 120 and a pair of connecting members 121 are connected by solder or the like. The material of the first outer member 112 is not limited, but in the present embodiment, the first outer member 112 is made of paper such as kraft paper.

[0018] The second outer member 113 is a cylindrical member that is arranged on the outer peripheral surface side of the inner member 111, at a position closer to the diaphragm 140 than the voice coil 120, with a gap between it and the first outer member 112. The material of the second outer member 113 may be the same as or different from the material of the first outer member 112. In the present embodiment, the second outer member 113, like the first outer member 112, is made of paper such as kraft paper.

[0019] Voice coil 120 is a component that is wound around the end of bobbin 110 that is farther from diaphragm 140. Voice coil 120 is a component that is disposed within the magnetic gap of magnetic circuit 170, generates magnetic flux based on an input electrical signal, and vibrates in the direction of the winding axis (Z-axis direction in the figure) due to interaction with the magnetic flux from magnetic circuit 170. There are no particular restrictions on the material of voice coil 120 as long as it is an electrical conductor, but in this embodiment, it is formed by winding a single metallic wire multiple times into a circular (cylindrical) shape.

[0020] Magnetic circuit 170 is a device that generates a steady magnetic flux that interacts with the magnetic flux generated by voice coil 120, and includes a tubular magnetic gap in which voice coil 120 is disposed. The magnetic gap is an air gap that generates a steady magnetic flux in a direction that intersects with the magnetic flux generated in voice coil 120. Magnetic circuit 170 is attached integrally to frame 130 so as to be located behind diaphragm 140 (Z-side in the figure).

[0021] In the present embodiment, magnetic circuit 170 is an external magnet type and includes magnetized annular (cylindrical) magnet 171 arranged coaxially with the winding axis of voice coil 120, an annular front plate 172 arranged coaxially with the winding axis of voice coil 120 on the surface of magnet 171 facing diaphragm 140, and a rear member 173 arranged on the rear side of magnet 171 opposite front plate 172. Rear member 173 is a member known as a yoke or the like, and includes a center pole 174 that is inserted from the center into a through hole in front plate 172 and forms a magnetic gap between it and front plate 172. Rear member 173 and center pole 174 are integrally formed.

[0022] The front panel 172 and the rear member 173 including the center pole 174 are made of a magnetic material. The magnet 171 is preferably a neodymium magnet or the like that has high magnetic energy. This allows the thickness of the magnet 171 to be thin, and the thickness of the entire electro-acoustic transducer 100 to be thin. Furthermore, weight reduction can be achieved. Alternatively, an external magnet structure using a ferrite magnet may be used.

[0023] Frame 130 is a member that holds magnetic circuit 170 and holds diaphragm 140 via edge 141. In the present embodiment, frame 130 is integrated with transmission member 123 by insert molding. Frame 130 has an overall cylindrical shape with a bottom, and a cover 169 is attached to the opposite side of magnetic circuit 170.

[0024] An annular damper mounting portion 168 is integrally provided inside the frame 130, coaxial with the winding axis of the voice coil 120, protruding forward from the front side of the magnetic circuit 170 and to which the outer periphery of the damper 160 is attached.

[0025] The material that constitutes the frame 130 is not particularly limited, but may be, for example, a resin such as polycarbonate.

[0026] Diaphragm 140 is a member to which bobbin 110 is connected, and generates sound by vibrating the air by being displaced in the front-to-rear direction (Z-axis direction in the drawing) based on the vibration of voice coil 120 from a neutral position. In the present embodiment, the outer periphery of diaphragm 140 is connected to frame 130 via edge 141, which has flexibility and restoring property, and is stretched between bobbin 110 and frame 130. A through-hole through which bobbin 110 is inserted is provided in the center of diaphragm 140, and the through-hole and the opening of bobbin 110 on the diaphragm 140 side are closed by cap 142.

[0027] The shape of diaphragm 140 is not particularly limited, and examples thereof include a cone, an elliptical cone, and a pyramid, and it may also be a flat shape such as a disk, an elliptical plate, or a flat plate. The material constituting diaphragm 140 is not particularly limited, and examples thereof include paper, resin, and metal.

[0028] The flange portion 150 is a portion that protrudes outward from the outer peripheral surface of the bobbin 110 between the voice coil 120 and the diaphragm 140. The shape of the flange portion 150 is not limited, but in this embodiment, it is a circular ring with a rectangular cross section when cut along a plane including the winding axis. The flange portion 150 may be integral with or separate from the bobbin 110. When the flange portion 150 and the bobbin 110 are separate, the material of the flange portion 150 is not limited. In this embodiment, the flange portion 150 is formed by wrapping a strip of paper, such as kraft paper, around the outer peripheral surface of the first outer member 112. The beginning of the flange portion 150 is connected to the first outer member 112 with an adhesive, and the end of the flange portion 150 is also fixed with an adhesive. When the flange portion 150 is made of paper, the surface of the flange portion 150 to which the damper 160 is connected is fuzzy, thereby improving the bonding strength between the flange portion 150 and the damper 160.

[0029] The amount by which flange portion 150 protrudes from the outer peripheral surface of bobbin 110 is not limited. In the present embodiment, the amount by which flange portion 150 protrudes is greater than the amount by which voice coil 120 protrudes from the outer peripheral surface of bobbin 110. In other words, flange portion 150 protrudes outward more than voice coil 120. In the present embodiment, connecting member 121 is wired so as to pass between bobbin 110 and flange portion 150.

[0030] Damper 160 is a member connected to the outer peripheral surface of flange portion 150, and connected to magnetic circuit 170 or frame 130, and assists voice coil 120 in linear movement in the front-to-rear direction (Z-axis direction in the drawing). The shape of damper 160 is not limited, but in this embodiment, damper 160 includes outer ring portion 161, inner ring portion 162, and arm portion 163.

[0031] The outer ring portion 161 is an annular portion that is attached to a damper attachment portion 168 of the frame 130. In the present embodiment, the cross section of the outer ring portion 161 is rectangular.

[0032] The inner ring portion 162 is an annular portion attached to the outer peripheral surface of the flange portion 150, and is arranged concentrically (coaxially) with the outer ring portion 161. In this embodiment, the cross section of the inner ring portion 162 is rectangular, similar to that of the outer ring portion 161.

[0033] The arm portion 163 extends in the radial direction around the winding axis of the voice coil 120 and is a component that bridges the outer ring portion 161 and the inner ring portion 162, which are arranged coaxially with the winding axis of the voice coil 120. The damper 160 may include at least two arm portions 163, but in this embodiment, eight arm portions 163 are provided. The arm portions 163 are ribbon-shaped, thin in the front-rear direction and wide in the radial direction, and are curved in a ripple shape around the winding axis of the voice coil 120. This ensures a long stroke of the inner ring portion 162, which reciprocates together with the bobbin 110 relative to the outer ring portion 161. In other words, the arm portions 163 include a peak portion that bulges toward the front side (Z+ side in the figure) and a valley portion that recesses toward the rear side (Z- side in the figure), which are continuous in the radial direction. In this embodiment, when the curved state of one of the adjacent arm portions 163 on the outer ring portion 161 side is a peak, the curved state of the other outer ring portion 161 side is a valley, and the wave shapes in the radial direction of the adjacent arm portions 163 are curved in opposite phases.

[0034] The shape of the damper 160 is not limited, and the width of each arm 163 is the same in the radial direction, but the arm 163 may have a different width in the radial direction, such as a fan shape.

[0035] Next, a method for manufacturing the electro-acoustic transducer 100 will be described. First, using a conventional manufacturing method, the voice coil 120 is wound around one end of the inner member 111 of the bobbin 110 and attached. Next, both ends of the voice coil 120 are connected to a pair of connecting members 121 by soldering or the like. Next, the first outer member 112 and the second outer member 113 are attached to predetermined locations on the inner member 111. Next, the flange portion 150 is attached to a predetermined position on the first outer member 112. Hereinafter, the parts manufactured up to this point will be referred to as a sub-assembly 101.

[0036] 4, the sub-assembly 101 is inserted into the first cylindrical portion 211 located in the center of the first mold portion 201 from the voice coil 120 side. The circumferential positioning of the sub-assembly 101 relative to the first mold portion 201 is performed based on the marks 114 on the bobbin 110. When about half of the sub-assembly 101 is inserted into the first mold portion 201 in the winding axis direction of the voice coil 120, the end face of the flange portion 150 on the voice coil 120 side and the first sealing portion 212 of the first mold portion 201 come into planar contact.

[0037] 5, the second cylindrical portion 221 disposed in the center of the second mold portion 202 is inserted into the sub-assembly 101. When the second mold portion 202 is inserted until it abuts against the first mold portion 201, the entire circumference of the flange portion 150 is sandwiched between the first sealing portion 212 of the first mold portion 201 and the second sealing portion 222 of the second mold portion 202.

[0038] Next, as shown in Fig. 6, resin is filled into the space 203 (see Fig. 5) surrounded by the first mold portion 201, the second mold portion 202, and the flange portion 150 to form the damper 160. Although Figs. 4, 5, and 6 show a portion forming the arm portion 163 in which the connecting member 121 is not arranged, in the case of the arm portion 163 in which the connecting member 121 is arranged, the connecting member 121 is arranged and resin is filled around the connecting member 121, as shown in Fig. 7.

[0039] Through the above steps, the damper 160 connected to the flange portion 150 attached to the bobbin 110 is manufactured by insert molding. According to this manufacturing method, the damper 160 can be connected to the bobbin 110 via the flange portion 150 almost automatically without manual intervention, and a product with few dimensional errors can be stably manufactured.

[0040] The present invention is not limited to the above-described embodiments. For example, the present invention may be embodied in another embodiment by arbitrarily combining the components described in this specification or by excluding some of the components. Furthermore, the present invention also includes various modifications that would occur to a person skilled in the art without departing from the spirit of the present invention, i.e., the meaning of the wording of the claims.

[0041] For example, the electroacoustic transducer 100 may be not only a speaker but also a microphone that converts sound into an electrical signal.

[0042] Furthermore, the type of the magnetic circuit 170 provided in the electroacoustic transducer 100 is not limited, and an internal magnet type magnetic circuit 170 may be employed.

[0043] 8, the damper 160 may be a disc-shaped member curved like a ripple without the arm portion 163.

[0044] Furthermore, although the case where the transmission member 123 is wired inside the frame 130 has been described, the transmission member 123 may be wired inside or outside the frame 130 .

[0045] (summary) The electroacoustic transducer 100 of the first embodiment comprises a cylindrical bobbin 110, a voice coil 120 wound around one end of the bobbin 110, a magnetic circuit 170 having a tubular magnetic gap in which the voice coil 120 is arranged, a frame 130 to which the magnetic circuit 170 is attached, a diaphragm 140 connected to the bobbin 110 and the frame 130, a flange portion 150 protruding outward from the outer peripheral surface of the bobbin 110 between the voice coil 120 and the diaphragm 140, and a damper 160 connected to the outer peripheral surface of the flange portion 150 and connected to the magnetic circuit 170 or the frame 130.

[0046] According to the first aspect, the damper 160 can be easily attached to the bobbin 110 via the flange portion 150, and the accuracy of the attachment position of the damper 160 can be improved.

[0047] The method for manufacturing the electroacoustic transducer 100 of the second embodiment includes the method of the first embodiment, and the flange portion 150 is made of paper.

[0048] According to the second aspect, it is possible to improve the adhesive strength of the flange portion 150 by taking advantage of the fluffing of the paper and gaps between the fibers.

[0049] The electroacoustic transducer 100 of the third aspect includes the first or second aspect, and the amount of protrusion of the flange portion 150 from the outer peripheral surface of the bobbin 110 is greater than the amount of protrusion of the voice coil 120 from the outer peripheral surface of the bobbin 110.

[0050] According to the third aspect, the voice coil 120 can be easily connected to the outer peripheral surface of the flange portion 150 that protrudes beyond the voice coil 120 .

[0051] The fourth embodiment of the electro-acoustic transducer 100 includes any of the first to third embodiments, and has a mark 114 at the other end of the bobbin 110 opposite to the end at which the voice coil 120 is attached in the winding axis direction of the voice coil 120, and the diaphragm 140 is attached to the outer surface of the bobbin 110 between the mark 114 and the flange portion 150.

[0052] According to the fourth aspect, when manufacturing the electroacoustic transducer 100, alignment can be performed based on the mark 114, and the influence of the mark on the sound quality of the manufactured electroacoustic transducer 100 can be almost completely suppressed.

[0053] The electroacoustic transducer 100 of the fifth embodiment includes any of the first to fourth embodiments, and is provided with connecting members 121 electrically connected to both ends of the voice coil 120, and the connecting members 121 are wired to pass between the bobbin 110 and the flange portion 150.

[0054] According to the fifth aspect, it is possible to improve the degree of freedom in wiring of the connection member 121, such as by wiring to the connection terminal of the connection member 121 or by arranging the connection member 121 inside the damper 160.

[0055] The electro-acoustic transducer 100 of the sixth embodiment includes any of the first to fourth embodiments and is provided with connecting members 121 electrically connected to both ends of the voice coil 120, and the bobbin 110 is provided with a cylindrical inner member 111, a cylindrical first outer member 112 arranged outside the inner member 111 and on the voice coil 120 side, and a cylindrical second outer member 113 arranged outside the inner member 111 and on the diaphragm 140 side with a gap between it and the first outer member, and the connecting member 121 is wired to pass between the inner member 111 and the first outer member 112 and pass through the gap between the first outer member 112 and the second outer member 113.

[0056] According to the sixth aspect, it is possible to improve the degree of freedom in wiring of the connection member 121, such as by wiring to the connection terminal of the connection member 121 or by arranging the connection member 121 inside the damper 160.

[0057] The manufacturing method of the electroacoustic transducer 100 of the seventh embodiment is a manufacturing method of the electroacoustic transducer 100 of any one of the first embodiment to the sixth embodiment, in which the damper 160 is formed by filling the gap between the first mold portion 201 and the second mold portion 202, which are arranged to sandwich the entire circumference of the flange portion 150 in the winding axis direction of the voice coil 120, with resin.

[0058] According to the seventh aspect, the damper 160 can be attached to the bobbin 110 via the flange portion 150 without manual intervention, which improves the connection strength between the damper 160 and the flange portion 150 and improves the positional accuracy of the damper 160 relative to the bobbin 110. Furthermore, it is possible to improve the production efficiency of the electro-acoustic transducer 100. [Industrial Applicability]

[0059] The present disclosure can be used in an electro-acoustic transducer 100 such as a speaker that converts an electrical signal into sound, or a microphone that converts sound into an electrical signal. [Explanation of symbols]

[0060] 100 Electroacoustic Transducer 101 Sub-assembly 110 Bobbin 111 Inner member 112 First outer member 113 Second outer member 114 Landmark 120 voice coil 121 Connecting member 122 Connection 123 Transmission components 130 frames 140 Diaphragm 141 Edge 142 Cap 150 flange 160 Damper 161 Outer ring 162 Inner ring 163 Arm 168 Damper mounting part 169 Cover 170 Magnetic Circuit 171 Magnet 172 Front plate 173 Rear part 174 Center Pole 201 First mold section 202 Second mold section 203 Space 211 First cylindrical part 212 First sealing part 221 Second cylindrical part 222 Second sealing part

Claims

1. A cylindrical bobbin, a voice coil wound around one end of the bobbin; a magnetic circuit having a tubular magnetic gap in which the voice coil is disposed; a frame to which the magnetic circuit is attached; a diaphragm coupled to the bobbin and the frame; a flange portion that protrudes outward from an outer peripheral surface of the bobbin between the voice coil and the diaphragm; a damper connected to an outer peripheral surface of the flange portion and connected to the magnetic circuit or the frame; An electro-acoustic transducer comprising:

2. The flange portion is made of paper.

2. The electroacoustic transducer according to claim 1.

3. The flange portion protrudes from the outer peripheral surface of the bobbin by a greater amount than the voice coil protrudes from the outer peripheral surface of the bobbin.

3. The electroacoustic transducer according to claim 1 or 2.

4. a mark is provided on the other end of the bobbin opposite to the end to which the voice coil is attached in the winding axis direction of the voice coil; The diaphragm is The mark is attached to the outer peripheral surface of the bobbin between the mark and the flange portion.

3. The electroacoustic transducer according to claim 1 or 2.

5. connecting members electrically connected to both ends of the voice coil, The connecting member is The wiring is passed between the bobbin and the flange portion.

3. The electroacoustic transducer according to claim 1 or 2.

6. connecting members electrically connected to both ends of the voice coil, The bobbin is a cylindrical inner member; a cylindrical first outer member disposed outside the inner member and on the voice coil side; a cylindrical second outer member disposed outside the inner member and on the vibration plate side with a gap between the first outer member and the second outer member; Equipped with The connecting member is The wiring passes between the inner member and the first outer member and passes through the gap between the first outer member and the second outer member.

3. The electroacoustic transducer according to claim 1 or 2.

7. A method for manufacturing the electroacoustic transducer according to claim 1 or 2, comprising the steps of: The damper is formed by filling a resin into a gap between a first mold portion and a second mold portion that are arranged so as to sandwich the entire circumference of the flange portion in the winding axis direction of the voice coil. A method for manufacturing an electroacoustic transducer.

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