Electroacoustic device and circuit board end cap thereof

Abstract

To provide an electroacoustic device.SOLUTION: An electroacoustic device 10 comprises: a cover 100 that has an end surface provided with a depressed part and a first coupling part 130; an electroacoustic unit 200 that is fixed within a flange 120; a wiring board module 400; an elastic conductive member 481 that electrically connects the wiring board module 400 and the electroacoustic unit 200 together; a second coupling part 460 that is positioned in the wiring board module 400 and that is connected to the first coupling part 130; and a circuit-board end cap for completely covering the flange.SELECTED DRAWING: Figure 3A

Description

[Technical field]

[0001] END CAP FOR ELECTROACOUSTIC DEVICES FIELD OF THEINVENTION The present invention relates to end caps for electroacoustic devices, and more particularly to circuit board end caps for electroacoustic devices. [Background technology]

[0002] Typically, an electroacoustic component such as a dynamic speaker is welded to a circuit board through its plastic bottom cover by surface mount technology (SMT) and driven to produce sound through lines on the circuit board.

[0003] However, in today's industry demand for lighter, thinner, shorter and smaller external dimensions, there is a need in the industry to improve the thickness of the electroacoustic element to save materials, reduce labor hours and increase the market competitiveness of the product.

[0004] From the above, it is clear that the above technologies still have inconveniences and deficiencies, and need to be further improved. Therefore, how to effectively solve the above inconveniences and deficiencies is indeed one of the important research and development issues at the current stage, and is also the goal that needs to be urgently improved in the current related fields. Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE PRESENT EMBODIMENT The present invention aims to provide an electroacoustic device and circuit board end cap therefor to overcome the problems noted in the prior art. [Means for solving the problem]

[0006] An embodiment of the present invention provides an electro-acoustic device comprising: a cover having a recess and a first connecting portion on an end surface; an electro-acoustic unit secured within the recess; a circuit board module; at least one elastic conductive member secured to the circuit board module and electrically connecting the circuit board module and the electro-acoustic unit; and a second connecting portion located on the circuit board module and connected to the first connecting portion; and a circuit board end cap including the circuit board module and the electro-acoustic unit, the circuit board module completely covering the recess.

[0007] According to one or more embodiments of the present invention, a wiring board module includes a wiring board body having a first surface and a second surface opposing each other, the first surface being bonded to an end surface of the cover via an adhesive layer and completely covering a recessed portion, at least one first contact formed on the first surface and connected to the elastic conductive member, at least one second contact formed on the second surface, and a wiring circuit extending through the wiring board body and connected to the first contact and the second contact, respectively.

[0008] In accordance with one or more embodiments of the present invention, a first surface of the wiring board body has a line area and a surrounding groove, a wiring circuit is disposed within the line area, the surrounding groove surrounds the line area, and a flange extends partially outwardly from an end face of the cover such that the flange extends into the surrounding groove such that the circuit board end cap is assembled to the cover.

[0009] According to one or more embodiments of the present invention, the first connecting portion is located on a flange of the cover, the second connecting portion is located on a bottom surface of the surrounding groove of the wiring board body, the second connecting portion and the first connecting portion have complementary shapes, and the first connecting portion and the second connecting portion are respectively a concave structure and a convex structure, and the convex structure is inserted into the concave structure to fixedly connect the circuit board end cap to the cover.

[0010] According to one or more embodiments of the present invention, the circuit board end cap further includes a side frame unit secured between the cover and the circuit board module, the second joint being formed in the side frame unit.

[0011] According to one or more embodiments of the present invention, a wiring board module includes a wiring board body having opposing first and second surfaces, the first surface being joined to a side frame unit so as to be integrally molded, at least one first contact formed on the first surface and connected to an elastic conductive member, at least one second contact formed on the second surface, and a wiring circuit extending through the wiring board body and connected to the first contact and the second contact, respectively.

[0012] According to one or more embodiments of the present invention, the first surface of the wiring board body has a line area and a surrounding groove, the wiring circuit is disposed in the line area, the surrounding groove surrounds the line area, and the side frame unit is fixed within the surrounding groove and surrounds the line area.

[0013] In accordance with one or more embodiments of the present invention, a flange extends partially outwardly from an end face of the cover, and a side frame unit encloses an interior space capable of accommodating a wiring area, and the circuit board end cap is coupled to the cover with the flange extending into the interior space.

[0014] According to one or more embodiments of the present invention, the first connecting portion is formed on the inside of the flange, the second connecting portion is formed on the inner wall facing the internal space of the side frame unit, the shapes of the second connecting portion and the first connecting portion are complementary, and the first connecting portion and the second connecting portion are respectively a concave structure and a convex structure, and the convex structure is inserted into the concave structure to fixedly connect the circuit board end cap to the cover.

[0015] According to one or more embodiments of the present invention, the maximum width of the circuit board module is equal to the maximum width of the cover.

[0016] According to one or more embodiments of the present invention, the electro-acoustic unit is one of a speaker, a microphone and a buzzer.

[0017] According to one or more embodiments of the present invention, the elastic conductive member is one of a spring and a spring plate.

[0018] One embodiment of the present invention provides a circuit board end cap suitable for covering a cover of an electro-acoustic device and conducting an electro-acoustic unit within the cover, the circuit board end cap including a circuit board module, at least one elastic conductive member fixed to and electrically connected to the circuit board module, and a coupling portion located on the circuit board module for connecting to the cover.

[0019] According to one or more embodiments of the present invention, a wiring board module includes a wiring board body having a first surface and a second surface opposing each other, at least one first contact formed on the first surface and connected to an elastic conductive member, at least one second contact formed on the second surface, and a wiring circuit extending through the wiring board body and connected to the first contact and the second contact, respectively.

[0020] According to one or more embodiments of the present invention, the first surface of the wiring board body has a line area and a surrounding groove, the wiring circuit is disposed in the line area and the surrounding groove surrounds the line area.

[0021] According to one or more embodiments of the present invention, the coupling portion is located at a bottom surface of the surrounding groove of the wiring board body.

[0022] In accordance with one or more embodiments of the present invention, the circuit board end cap further includes a side frame unit secured within the surrounding groove and surrounding the wiring area to provide an interior space capable of accommodating the wiring area, and the coupling portion is formed in the side frame unit.

[0023] According to one or more embodiments of the present invention, the joints are formed on the inner walls facing the interior space of the side frame units.

[0024] According to one or more embodiments of the present invention, the maximum width of the circuit board module is equal to the maximum width of the cover.

[0025] According to one or more embodiments of the present invention, the elastic conductive member is one of a spring and a spring plate. Effect of the Invention

[0026] Thus, with the above structure, the present disclosure can simplify the structure of the electroacoustic device, effectively shorten the overall thickness of the electroacoustic device, save materials, reduce labor hours, and improve the market competitiveness of the product.

[0027] The above description is intended only to describe the problems that the present invention aims to solve, the means for solving the problems, and the effects of the invention. Specific details of the present invention will be described in detail in the embodiments and related drawings described below. [Brief description of the drawings]

[0028] To make the above and other objects, features, advantages and embodiments of the present invention more clear and understandable, reference is made to the accompanying drawings as follows. [Figure 1] 1 is a perspective view of an electroacoustic device according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 3A] FIG. 2 is an exploded view of the electroacoustic device of FIG. [Figure 3B] 2 is an exploded view of the electroacoustic device of FIG. 1 in another view. [Figure 4] 1 is an exploded view of an electroacoustic device according to an embodiment of the present invention; [Diagram 5] 1 is a perspective view of an electroacoustic device according to an embodiment of the present invention; [Figure 6] FIG. 6 is a cross-sectional view taken along line BB in FIG. 5. [Figure 7] FIG. 7 is an exploded view of the circuit board end cap of FIG. [Figure 8] 1 is a cross-sectional view of an electroacoustic device according to an embodiment of the present invention. [Figure 9] FIG. 2 is an exploded view of a circuit board end cap according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] In the following, several embodiments of the present invention are disclosed in the drawings, and in order to clearly explain them, many practical details are described in the following description. However, it should be understood that these practical details are not applied to limit the present invention. That is, these practical details are not necessary in each embodiment of the present invention. In addition, in order to simplify the drawings, some conventional structures and elements are simply and diagrammatically shown in the drawings.

[0030] FIG. 1 is a perspective view of an electroacoustic device 10 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. FIG. 3A is an exploded view of the electroacoustic device 10 in FIG. 1. FIG. 3B is an exploded view of the electroacoustic device 10 in FIG. 1 in another view. As shown in FIGS. 1 and 2, in this embodiment, the electroacoustic device 10 includes a cover 100, an electroacoustic unit 200, and a circuit board end cap 300. The cover 100 has a closed end 101 at one end and an end face 102 at the other end having a recess 110 and a first coupling portion 130 (FIG. 3B). The electroacoustic unit 200 is fixed in the recess 110, and for example, the position of the electroacoustic unit 200 is restricted by a position restricting structure 111 in the recess 110 by adhesion or engagement. The circuit board end cap 300 completely covers the recess 110 and is located completely or at least partially outside the recess 110, thereby closing the recess 110 together with the cover 100. In addition, the circuit board end cap 300 is electrically connected to the electric acoustic unit 200, so that the electric acoustic unit 200 can produce sound by driving the circuit board module 400.

[0031] More specifically, the circuit board end cap 300 includes a wiring board module 400, one or more (e.g., two) elastic conductive members 481, and a second coupling portion 460 (FIG. 3A). The elastic conductive members 481 electrically connect the wiring board module 400 and the electro-acoustic unit 200. The second coupling portion 460 is located on the wiring board module 400. Thus, when the second coupling portion 460 is connected to the first coupling portion 130, the circuit board end cap 300 is assembled to the end surface 102 of the cover 100.

[0032] The wiring board module 400 includes a wiring board body 410, one or more (for example, two) first contacts 430, one or more (for example, two) second contacts 440, and a wiring circuit 450. The wiring board body 410 includes a first surface 411 and a second surface 412 facing each other. The first surface 411 is coupled to the end surface 102 of the cover 100 by a joining feature (for example, a screw or an adhesive) and is used to completely cover the recessed portion 110. The first contact 430 is formed on the first surface 411 and is connected to the elastic conductive member 481. The second contact 440 is formed on the second surface 412. The wiring circuit 450 is provided through the wiring board body 410 and is respectively connected to the first contact 430 and the second contact 440. The first contact 430 and the second contact 440 are, for example, welding pads on a circuit board. One end of elastic conductive member 481 is welded to first contact 430, and the other end is directly abutted against an electrical terminal (not shown) of electric acoustic unit 200 without using solder, thereby solving common problems such as high process difficulty, high labor hours and costs, and poor quality stability that arise when welding with a conductor or connecting with a metal member.

[0033] Furthermore, in this embodiment, wiring board body 410 includes a plurality of layers (not shown) laminated on each other, and wiring circuit 450 includes a plurality of cables 451 and through-hole conductive parts 452 (VIAs) to be connected to first contacts 430 and second contacts 440, respectively. Wiring board body 410 is, for example, a heat-resistant glass fiberboard that can withstand high-temperature baking in a reflow oven.

[0034] In this embodiment, the wiring board body 410 is a double-sided copper foil circuit board, and the first contact 430 and the second contact 440 are respectively welding pads on the circuit board. The cover 100 also has a cylindrical shape, the wiring board body 410 has a circular cake shape, and the circumferential surface 413 of the wiring board body 410 is located between the first surface 411 and the second surface 412, surrounds the first surface 411 and the second surface 412, and connects the first surface 411 and the second surface 412. The maximum width W of the wiring board module 400 is approximately equal to the maximum width W of the cover 100. However, the present invention is not limited thereto. However, the present invention is not limited to the type, shape, material, and type of fixing feature of the wiring board body 410.

[0035] In addition, in this embodiment, the first surface 411 of the wiring board body 410 is divided into a line region 411A and a surrounding region 411B. The surrounding region 411B completely surrounds the line region 411A. The wiring circuit 450 is not located within the range of the surrounding region 411B, but is only located within the range of the line region 411A. The wiring board body 410 further has a surrounding groove 420. The surrounding groove 420 is recessed in the surrounding region 411B of the first surface 411, and the surrounding groove 420 and the line region 411A have different planar heights. For example, the range of the surrounding groove 420 is equal to the range of the surrounding region 411B, and the surrounding groove 420 connects the line region 411A and the circumferential surface 413 of the wiring board body 410, but the present invention is not limited thereto. A flange 120 extends partially outwardly from end surface 102 of cover 100, and flange 120 may be, for example, annular. In this manner, when flange 120 extends into surrounding groove 420, circuit board end cap 300 may be assembled to cover 100 such that circuit board end cap 300 covers recessed portion 110 of cover 100.

[0036] In this embodiment, the first coupling portion 130 is provided on the flange 120 of the cover 100, and the second coupling portion 460 is located on the bottom surface 421 of the surrounding groove 420 of the wiring board body 410, and the shapes of the second coupling portion 460 and the first coupling portion 130 are complementary. In this embodiment, the first coupling portion 130 is a convex structure, and the convex structure is located so as to be integrally molded on the surface facing away from the closed end 101 of the flange 120 of the cover 100. The second coupling portion 460 is a concave structure. The concave structure is, for example, a through hole connecting the bottom surface 421 of the surrounding groove 420 and the second surface 412 of the wiring board body 410, but the present invention is not limited thereto, and the second coupling portion 460 may be a blind hole. In this manner, when the circuit board end cap 300 covers the cover 100, the convex structure is inserted into the concave structure, so that the circuit board end cap 300 can be fixed to the cover 100 without easily coming off from the cover 100.

[0037] In one embodiment, the electroacoustic unit 200 is a buzzer (e.g., a piezoelectric buzzer or a magnetic buzzer), but the present invention is not limited to the type of electroacoustic unit 200, and in other embodiments, the electroacoustic unit 200 may be a speaker (e.g., a dynamic speaker or a metal diaphragm speaker or a microphone).

[0038] In one embodiment, when the material properties of the cover 100 and the electroacoustic unit 200 cannot withstand the high temperature baking in a reflow oven and may be damaged, the assembly sequence of the electroacoustic device 10 in this embodiment is roughly as follows: After applying solder paste to the first contact 430 of the wiring board body 410 by an SMT automatic pick-and-place machine, the elastic conductive member 481 is made to stand on the solder paste, which can provide the advantages of saving man-hours, simple process, high productivity, stable quality, etc. Then, the wiring board module 400 is sent into a reflow oven, and the solder paste is melted by high temperature baking in the reflow oven, and the elastic conductive member 481 is welded to the first contact 430. Then, after the electroacoustic unit 200 is fixed in the recess 110, the circuit board end cap 300 is directly covered on the end surface 102 of the cover 100, and the elastic conductive member 481 can be directly pressed against the electric terminal (not shown) of the electroacoustic unit 200, thereby realizing the electroacoustic device 10 of this embodiment. However, the present invention is not limited thereto.

[0039] In one embodiment, the sounding body of the electro-acoustic element can be manufactured by adopting standard materials and standard processes, and there is no need to select high-temperature materials and special processes that can withstand the temperature of a reflow oven. Therefore, if the material properties of the wiring board body 410, the cover 100, and the sounding body of the electro-acoustic unit 200 can all withstand high-temperature baking in a reflow oven without being damaged, the assembled electro-acoustic device 10 can be directly fed into the reflow oven, and the wiring board module 400 and the cover 100 can be assembled without being baked, thus simplifying the procedure and reducing the manufacturing cost.

[0040] 4 is an exploded view of an electroacoustic device 11 according to an embodiment of the present invention. As shown in FIG. 4, the electroacoustic device 11 according to this embodiment is almost the same as the electroacoustic device 10 according to the embodiment described above (FIG. 3B), and the difference is that the first coupling portion 140 is a recessed structure, which is formed in the flange 120 of the end surface 102 of the cover 100, and the second coupling portion 470 is a protruding structure, which is located so as to be integrally formed with the bottom surface 421 of the surrounding groove 420, and is connected to the line area 411A and has the same planar height as the line area 411A. In this way, when the circuit board end cap 301 covers the cover 100, the protruding structure is inserted into the recessed structure, so that the circuit board end cap 301 can be fixed to the cover 100 without being easily removed from the cover 100.

[0041] Furthermore, whereas these elastic conductive members 481 of the electroacoustic device 10 (FIG. 3A) of the above-described embodiment are springs (e.g., tower springs or compression coil springs, etc.) whose long axis direction L is perpendicular to the first surface 411 of the wiring board main body 410, the elastic conductive members 482 of the present embodiment are different from springs and are spring plates, for example, lateral spring plates with inclined arms, and gradually move away from the first surface 411 of the wiring board main body 410 in the direction of the cover 100.

[0042] FIG. 5 is a perspective view of electroacoustic device 12 according to an embodiment of the present invention. FIG. 6 is a cross-sectional view taken along line BB in FIG. 5. FIG. 7 is an exploded view of circuit board end cap 302 in FIG. 6. As shown in FIGS. 5 to 7, electroacoustic device 12 according to this embodiment is substantially the same as electroacoustic device 10 according to the embodiment described above (FIG. 1), with the difference being that circuit board end cap 302 further includes side frame unit 500. Side frame unit 500 is provided on the side of circuit board module 401 facing cover 100, and covers end surface 102 of cover 100 together with circuit board module 401, so that side frame unit 500 is fixed between cover 100 and circuit board module 401 (FIG. 6).

[0043] More specifically, one side of side frame unit 500 is fixed in surrounding groove 420 of wiring board main body 410, and completely surrounds line area 411A. Therefore, side frame unit 500 surrounds line area 411A to form internal space 510 capable of accommodating line area 411A. Side frame unit 500 is joined to wiring board main body 410 so as to be integrally molded.

[0044] For example, the side frame unit 500 is bonded to the first surface 411 of the wiring board body 410 by insert molding. Furthermore, the wiring board body 410 has a rubber solidification groove 422. The rubber solidification groove 422 is formed on the bottom surface 421 of the surrounding groove 420 of the wiring board body 410. In this embodiment, the rubber solidification groove 422 is, for example, a through hole connecting the bottom surface 421 of the surrounding groove 420 and the second surface 412 of the wiring board body 410, but the present invention is not limited thereto, and the rubber solidification groove 422 may be a blind hole. In this way, when the insert molding procedure is performed on the wiring board body 410, the side frame unit 500 is molded on the wiring board body 410, and the portion 501 flows into the rubber solidification groove 422, and the joining strength when the side frame unit 500 is attached to the wiring board body 410 is increased, and it is difficult to come off from the wiring board body 410.

[0045] In this embodiment, first coupling portion 150 is provided on flange 120 of cover 100. Second coupling portion 520 is not formed on circuit board module 401 but on side frame unit 500. Flange 120 extends into interior space 510, allowing circuit board end cap 302 to be assembled to cover 100.

[0046] More specifically, the first coupling portion 150 is formed on the inner side toward the recessed portion 110 of the flange 120. The second coupling portion 520 is formed on the inner wall toward the internal space 510 of the side frame unit 500, and the shapes of the second coupling portion 520 and the first coupling portion 150 are complementary. Therefore, the circuit board end cap 302 is fixedly connected to the cover 100 by the mutual coupling of the first coupling portion 150 and the second coupling portion 520. In this embodiment, the first coupling portion 150 is a convex structure. The convex structure is located so as to be integrally formed on the inner side toward the recessed portion 110 of the flange 120. The second coupling portion 520 is a concave structure. The concave structure is formed on the inner wall toward the internal space 510 of the side frame unit 500, but the present invention is not limited thereto. In this manner, when the circuit board end cap 302 covers the cover 100, the convex structure is inserted into the concave structure, thereby allowing the circuit board end cap 302 to be fixed to the cover 100 without easily coming off from the cover 100.

[0047] Moreover, the cover 100 further has a number of vocal holes 170. These vocal holes 170 are formed at the closed end 101 and communicate with the recessed portion 110, and are used to transmit the sound of the electroacoustic unit 200 to the outside.

[0048] 8 is a cross-sectional view of an electroacoustic device 13 according to an embodiment of the present invention. As shown in FIG. 8, the electroacoustic device 13 according to this embodiment is almost the same as the electroacoustic device 12 according to the embodiment described above (FIG. 7), and the difference is that in this embodiment, the first coupling portion 160 is a recessed structure, which is formed on the inside toward the recessed portion 110 of the flange 120 and surrounds the recessed portion 110, and the second coupling portion 530 is a protruding structure, which protrudes so as to be integrally formed with the inner wall of the internal space 510 of the side frame unit 500 and surrounds the internal space 510. In this way, when the circuit board end cap 302 covers the cover 100, the protruding structure is inserted into the recessed structure, so that the circuit board end cap 302 can be fixed to the cover 100 without being easily removed from the cover 100.

[0049] FIG. 9 is an exploded view of a circuit board end cap 303 according to an embodiment of the present invention. As shown in FIG. 9, the circuit board end cap 303 according to this embodiment is almost the same as the circuit board end cap 302 according to the embodiment described above (FIG. 7), and the difference is that in this embodiment, the circuit board end cap 303 has a rubber solidified convex rib 423. This rubber solidified convex rib 423 is located so as to be integrally molded on the bottom surface 421 of the surrounding groove 420, is connected to the line area 411A, and has the same planar height as the line area 411A. In this way, when the insert molding procedure is performed on the wiring board body 410, the side frame unit 500 is molded on the wiring board body 410, and its portion 502 flows into the surrounding groove 420 and covers the rubber solidified convex rib 423, so that the joining strength when the side frame unit 500 is attached to the wiring board body 410 is increased and it is difficult to come off from the wiring board body 410.

[0050] Thus, with the above structure, the present disclosure can simplify the structure of the electroacoustic device, effectively shorten the overall thickness of the electroacoustic device, save materials, reduce labor hours, and improve the market competitiveness of the product.

[0051] Finally, the above disclosed embodiments are not intended to limit the present invention, and those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications are the subject of protection of the present invention. Therefore, the scope of protection of the present invention is limited by the following claims. [Explanation of symbols]

[0052] 10~13 Electrical sound equipment 100 Cover 101 Closed end 102 End face 110 Recess 111 Position regulation structure 120 Flange 130, 140, 150, 160 First joint 170 Vocal Hole 200 Electrical Acoustic Unit 300~303 Circuit Board End Caps 400, 401 Circuit board module 410 Wiring board body 411 First Side 411A Line Area 411B Enclosing Area 412 Second Side 413 Circumferential surface 420 Surrounding Ditch 421 Bottom 422 Rubber solidification groove 423 Rubber solidification convex rib 430 First Contact 440 Second Contact 450 Wiring circuit 451 Cable 452 Conductive through-hole 460, 470 Second joint 481, 482 Elastic conductive member 500 Side Frame Unit 501, 502 parts 510 Interior Space 520, 530 Second joint AA, BB line segments W Maximum width L Long axis direction

Claims

1. a cover having a recessed portion and a first coupling portion on an end surface; an electroacoustic unit fixed in the recess; a circuit board end cap including a circuit board module, at least one elastic conductive member fixed to the circuit board module and electrically connecting the circuit board module and the electro-acoustic unit, and a second coupling portion located on the circuit board module and connected to the first coupling portion, the circuit board end cap completely covering the recess; An electroacoustic device comprising:

2. The wiring board module includes: a wiring board body having a first surface and a second surface opposed to each other, the first surface being bonded to the end surface of the cover via an adhesive layer and completely covering the recess; at least one first contact formed on the first surface and connected to the elastic conductive member; at least one second contact formed on the second surface; a wiring circuit extending through the wiring board body and connected to the first contact and the second contact, respectively; 2. The electroacoustic device of claim 1, comprising:

3. The first surface of the wiring board body is divided into a line area and a surrounding groove, the wiring circuit is disposed in the line area, and the surrounding groove surrounds the line area; and 3. The electroacoustic device of claim 2, wherein said circuit board end cap is coupled to said cover by a flange extending partially outwardly from said end face of said cover, said flange extending into said surrounding groove.

4. 4. The electroacoustic device of claim 3, wherein the first connecting portion is located on the flange of the cover, the second connecting portion is located on the bottom surface of the surrounding groove of the wiring board body, the second connecting portion and the first connecting portion have complementary shapes, and the first connecting portion and the second connecting portion are respectively a concave structure and a convex structure, and the convex structure is inserted into the concave structure to fixedly connect the circuit board end cap to the cover.

5. the circuit board end cap further includes a side frame unit secured between the cover and the circuit board module; 3. The electroacoustic device according to claim 1, wherein the second connecting portion is formed on the side frame unit.

6. The wiring board module includes: a wiring board body having a first surface and a second surface opposed to each other, the first surface being joined to the side frame unit so as to be integrally formed therewith; at least one first contact formed on the first surface and connected to the elastic conductive member; at least one second contact formed on the second surface; a wiring circuit extending through the wiring board body and connected to the first contact and the second contact, respectively; 6. An electroacoustic device according to claim 5, comprising:

7. The electroacoustic device described in claim 6, wherein the first surface of the wiring board body has a line area and a surrounding groove, the wiring circuit is arranged in the line area, the surrounding groove surrounds the line area, and the side frame unit is fixed within the surrounding groove and surrounds the line area.

8. 8. The electroacoustic device of claim 7, wherein a flange extends partially outward from the end face of the cover, the side frame unit encloses the wiring area to form an internal space capable of accommodating the wiring area, and the circuit board end cap is coupled to the cover by the flange extending into the internal space.

9. 9. The electroacoustic device of claim 8, wherein the first connecting portion is formed on the inside of the flange, the second connecting portion is formed on an inner wall of the side frame unit facing the internal space, the second connecting portion and the first connecting portion have complementary shapes, and the first connecting portion and the second connecting portion are respectively a concave structure and a convex structure, and the circuit board end cap is fixedly connected to the cover by inserting the convex structure into the concave structure.

10. 3. An electroacoustic device according to claim 1, wherein a maximum width of the circuit board module is equal to a maximum width of the cover.

11. 3. The electroacoustic device according to claim 1, wherein the electroacoustic unit is one of a speaker, a microphone, and a buzzer.

12. 3. An electroacoustic device according to claim 1 or 2, wherein the elastic conductive member is one of a spring and a spring plate.

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