CN218387879U - Electroacoustic device and circuit board end cover thereof - Google Patents

Abstract

The utility model provides an electroacoustic device and a circuit board end cover thereof. The electroacoustic device comprises a cover, an electroacoustic unit and a circuit board end cover. The end surface of the cover has a concave portion and a first joint portion. The electro-acoustic unit is fixed in the recessed part. The circuit board end cover completely covers the recessed part, and the circuit board end cover includes a wiring board module, an elastic conductive part and a second joint part. The elastic conductive part is electrically connected to the wiring board module and the electroacoustic unit. The second combination part is located on the wiring board module and connected to the first combination part. Through the above structure, the utility model can simplify the structure of the electro-acoustic device, effectively shorten the overall thickness of the electro-acoustic device, save materials and shorten man-hours, thereby improving the market competitiveness of the product.

Description

Electroacoustic device and its circuit board end cover

technical field

The utility model relates to an end cover of an electroacoustic device, in particular to a circuit board end cover of an electroacoustic device.

Background technique

Generally speaking, electroacoustic components, such as dynamics speakers, are usually welded to the circuit board through its plastic bottom cover through surface mount technology (SMT), so as to drive the sound through the circuit board circuit. .

However, under the pursuit of light, thin and short appearance in the current industry, the industry hopes to improve the thickness of the above-mentioned electro-acoustic components, save materials and shorten man-hours, so as to improve the market competitiveness of the products.

This shows that the above-mentioned technology obviously still has inconvenience and defective, and needs to be further improved. Therefore, how to effectively solve the above-mentioned inconveniences and defects is one of the current important research and development topics, and it has also become an urgent need for improvement in related fields.

Utility model content

An object of the present invention is to provide an electro-acoustic device and its circuit board end cover to solve the above mentioned difficulties in the prior art.

An embodiment of the utility model provides an electroacoustic device. The electro-acoustic device includes a cover, an electro-acoustic unit and a circuit board end cover. The end surface of the cover has a concave portion and a first joint portion. The electro-acoustic unit is fixed in the concave part. The circuit board end cover completely covers the recessed part, and the circuit board end cover includes a wiring board module, at least one elastic conductive part and a second joint part. The elastic conductive part is fixed on the wiring board module and is electrically connected with the wiring board module and the electroacoustic unit. The second combination part is located on the wiring board module and connected to the first combination part.

According to one or more embodiments of the present invention, the wiring board module includes a wiring board body, at least one first contact, at least one second contact and a wiring circuit. The wiring board body has a first surface and a second surface opposite to each other, the first surface is combined to the end surface of the cover through the adhesive layer, and completely covers the recessed part. The first contact is formed on the first surface and connected to the elastic conductive element. The second contact is formed on the second surface. The wiring circuit is passed through the wiring board body and connected to the first contact and the second contact respectively.

According to one or more embodiments of the present invention, the first surface area of the wiring board body has a wiring area and a surrounding groove, the wiring circuit is disposed in the wiring area, and the surrounding groove surrounds the wiring area. The end face of the cover partially protrudes outward from the flange, through which the flange extends into the surrounding groove, and the end cover is combined on the cover.

According to one or more embodiments of the present invention, the first joint part is located on the flange of the cover, the second joint part is located on the bottom surface of the surrounding groove of the wiring board body, the shape of the second joint part is complementary to that of the first joint part, and The first joint part and the second joint part are respectively a concave part structure and a convex part structure, wherein the convex part structure is inserted into the concave part structure, and the circuit board end cover is fixedly connected to the cover cover.

According to one or more embodiments of the present invention, the circuit board end cover further includes a side frame unit. The side frame unit is fixed between the cover and the wiring board module, and the second joint part is formed on the side frame unit.

According to one or more embodiments of the present invention, the wiring board module includes a wiring board body, at least one first contact, at least one second contact and a wiring circuit. The wiring board body has a first surface and a second surface opposite to each other, and the first surface is integrally joined to the side frame unit. The first contact is formed on the first surface and connected to the elastic conductive element. The second contact is formed on the second surface. The wiring circuit is passed through the wiring board body and connected to the first contact and the second contact respectively.

According to one or more embodiments of the present invention, the first surface of the wiring board body has a wiring area and a surrounding groove. The wiring circuit is arranged in the circuit area, and the surrounding groove surrounds the circuit area, and the side frame unit is fixed in the surrounding groove and surrounds the circuit area.

According to one or more embodiments of the present invention, the end surface of the cover partially protrudes outward from the flange. The side frame unit surrounds an inner space capable of accommodating the circuit area. Therefore, through the flange extending into the inner space, the circuit board end cover is assembled to the cover.

According to one or more embodiments of the present invention, the first joint part is formed on the inner side of the flange, the second joint part is formed on the inner wall of the side frame unit facing the inner space, the second joint part is complementary in shape to the first joint part, and The first joint part and the second joint part are respectively a concave part structure and a convex part structure, through which the convex part structure is inserted into the concave part structure, and the end cover of the circuit board is fixedly connected to the cover cover.

According to one or more embodiments of the present invention, the maximum width of the wiring board module is equal to the maximum width of the cover.

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

According to one or more embodiments of the present invention, the elastic conductive member is one of a spring and a shrapnel.

An embodiment of the utility model provides a circuit board end cover. The circuit board end cover is suitable for covering the cover of the electro-acoustic device and conducting the electro-acoustic unit in the cover. The circuit board end cover includes a wiring board module, at least one elastic conductive part and a joint part. The elastic conductive part is fixed on the wiring board module and is electrically connected to the wiring board module. The bonding part is located on the wiring board module and is used for connecting the cover.

According to one or more embodiments of the present invention, the wiring board module includes a wiring board body, at least one first contact, at least one second contact and a wiring circuit. The wiring board body has a first surface and a second surface opposite to each other. The first contact is formed on the first surface and connected to the elastic conductive element. The second contact is formed on the second surface. The wiring circuit is passed through the wiring board body and connected to the first contact and the second contact respectively.

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

According to one or more embodiments of the present invention, the joint part is located on the bottom surface of the surrounding groove of the wiring board body.

According to one or more embodiments of the present invention, the circuit board end cover further includes a side frame unit. The side frame unit is fixed in the surrounding groove and surrounds the circuit area, and the side frame unit also surrounds an inner space capable of accommodating the circuit area, and the joint part is formed on the side frame unit.

According to one or more embodiments of the present invention, the joint portion is formed on the inner wall of the side frame unit facing the inner space.

According to one or more embodiments of the present invention, the maximum width of the wiring board module is equal to the maximum width of the cover.

According to one or more embodiments of the present invention, the elastic conductive member is one of a spring and a shrapnel.

Thus, through the above structure, the utility model can simplify the structure of the electro-acoustic device, effectively shorten the overall thickness of the electro-acoustic device, save materials and shorten man-hours, thereby improving the market competitiveness of the product.

The above description is only used to illustrate the problems to be solved by the utility model, the technical means to solve the problems, and the effects thereof, etc. The specific details of the utility model will be introduced in detail in the following embodiments and related drawings.

Description of drawings

In order to make the above and other purposes, features, advantages and embodiments of the present invention more obvious and understandable, the accompanying drawings are described as follows:

Fig. 1 is a perspective view of an electroacoustic device according to an embodiment of the present invention;

Fig. 2 is a cross-sectional view made along line AA of Fig. 1;

FIG. 3A is an exploded view of the electroacoustic device of FIG. 1;

3B is an exploded view of the electroacoustic device of FIG. 1 at another viewing angle;

Fig. 4 is an exploded view of an electroacoustic device according to an embodiment of the present invention;

Fig. 5 is a perspective view of an electroacoustic device according to an embodiment of the present invention;

Fig. 6 is a cross-sectional view made along line segment BB in Fig. 5;

Fig. 7 is an exploded view of the circuit board end cover of Fig. 6;

8 is a cross-sectional view of an electroacoustic device according to an embodiment of the present invention; and

FIG. 9 is an exploded view of a circuit board end cover according to an embodiment of the present invention.

Detailed ways

A number of embodiments of the present invention will be disclosed with the accompanying drawings. For the sake of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the invention. That is to say, in each embodiment of the present invention, these practical details are unnecessary. In addition, for the sake of simplifying the drawings, some existing conventional structures and elements will be shown in a simple and schematic way in the drawings.

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 of FIG. 1 . FIG. 3A is an exploded view of the electroacoustic device 10 of FIG. 1 . FIG. 3B is an exploded view of the electroacoustic device 10 in FIG. 1 at another viewing angle. As shown in FIGS. 1 and 2 , in this embodiment, the electro-acoustic device 10 includes a cover 100 , an electro-acoustic unit 200 and a circuit board end cover 300 . One end of the cover 100 is a closed end 101 , and the other end surface 102 has a concave portion 110 and a first joint portion 130 ( FIG. 3B ). The electro-acoustic unit 200 is fixed in the recessed portion 110 , for example, the electro-acoustic unit 200 is limited on the limiting structure 111 in the recessed portion 110 by means of adhesion or engagement. The circuit board end cover 300 completely covers the recess 110 , and the circuit board end cover 300 is completely outside the recess 110 , or at least partially outside the recess 110 , so as to close the recess 110 together with the cover 100 . In addition, the circuit board end cover 300 is electrically connected to the electro-acoustic unit 200 , so that the electro-acoustic unit 200 can be driven by the wiring board module 400 to generate sound.

More specifically, the circuit board end cover 300 includes a wiring board module 400 , one or more (eg, two) elastic conductive members 481 and a second bonding portion 460 ( FIG. 3A ). The elastic conductive member 481 is electrically connected to the wiring board module 400 and the electro-acoustic unit 200 . The second combining portion 460 is located on the wiring board module 400 . Therefore, when the second combining portion 460 is connected to the first combining portion 130 , the circuit board end cover 300 is combined to the end surface 102 of the cover 100 .

The wiring board module 400 includes a wiring board body 410 , one or more (eg, 2) first contacts 430 , one or more (eg, 2) second contacts 440 and a wiring circuit 450 . The wiring board body 410 includes a first surface 411 and a second surface 412 opposite to each other. The first surface 411 is coupled to the end surface 102 of the cover 100 through joint features (such as screws or adhesives) to completely cover the recessed portion 110 . The first contact 430 is formed on the first surface 411 and connected to the elastic conductive member 481 . The second contact 440 is formed on the second surface 412 . The wiring circuit 450 passes 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, solder pads on a circuit board. One end of the elastic conductive member 481 is welded to the first contact point 430, and the other end directly abuts against the electrical terminal (not shown in the figure) of the electro-acoustic unit 200 without solder, thereby solving the problem of traditional wire welding or metal connection. Common problems such as high process difficulty, high man-hour cost, and poor quality stability.

Furthermore, in this embodiment, the wiring board body 410 includes a plurality of laminated layers (not shown in the figure), and the wiring circuit 450 includes a plurality of traces 451 and through-connection parts 452 (VIA), so that The first contact 430 and the second contact 440 are respectively connected. The wiring board body 410 is, for example, a heat-resistant fiberglass board that can withstand high temperature baking in a reflow oven.

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 welding pads on the circuit board, respectively. The cover 100 is also cylindrical, and the wiring board body 410 is in the shape of a round cake. The peripheral surface 413 of the wiring board body 410 is located between the first surface 411 and the second surface 412, and surrounds the first surface 411 and the second surface 412. , and connect the first surface 411 and the second surface 412 . The maximum width W of the wiring board module 400 is substantially 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 types, shapes, materials and fixing features of the wiring board body 410 .

In addition, in this embodiment, the first surface 411 of the wiring board body 410 is divided into a circuit area 411A and a surrounding area 411B. The surrounding area 411B completely surrounds the line area 411A. The wiring circuit 450 is only disposed within the range of the line area 411A, but not within the range of the surrounding area 411B. The wiring board body 410 also has a surrounding groove 420 . The surrounding groove 420 is recessed in the surrounding area 411B of the first surface 411 , and the surrounding groove 420 and the circuit area 411A have different plane heights. For example, the range of the surrounding groove 420 is equal to that of the surrounding area 411B, and the surrounding groove 420 connects the circuit area 411A and the peripheral surface 413 of the wiring board body 410 , however, the present invention is not limited thereto. The end surface 102 of the cover 100 partially protrudes from a flange 120 , and the flange 120 is, for example, ring-shaped. In this way, when the flange 120 protrudes into the surrounding groove 420 , the end cover can be assembled to the cover 100 , so that the end cover covers the concave portion 110 of the cover 100 .

In this embodiment, the first joint part 130 is disposed on the flange 120 of the cover 100, the second joint part 460 is located on the bottom surface 421 of the surrounding groove 420 of the wiring board body 410, and the second joint part 460 is combined with the first joint Portions 130 are complementary in shape. In this embodiment, the first combining portion 130 is a protrusion structure, and the protrusion structure is integrally formed on the side of the flange 120 of the cover 100 facing away from the closed end 101 . The second combining portion 460 is a concave structure. The recess 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 . However, the present invention is not limited thereto, and the second bonding portion 460 may also be a blind hole. In this way, when the circuit board end cover 300 covers the cover 100 , the circuit board end cover 300 can be fixed on the cover 100 by inserting the protrusion structure into the recess structure, so as not to be easily detached from the cover 100 .

In one of the embodiments, the above-mentioned electro-acoustic unit 200 is a buzzer (such as piezoelectric buzzer, piezoelectricbuzzer or electromagnetic buzzer, magnetic buzzer), however, the utility model is not limited to the type of electro-acoustic unit 200 , other embodiments, the electroacoustic unit 200 may also be a speaker (such as a dynamic speaker, a dynamic speaker or a metal diaphragm (diaphragm) or a microphone.

In one embodiment, if the material properties of the cover 100 and the electro-acoustic unit 200 cannot withstand the high-temperature baking of the reflow oven and may cause damage, the assembly sequence of the electro-acoustic device 10 of this embodiment is roughly as follows. After the SMT automatic printing machine prints solder paste on the first contact 430 of the wiring board body 410, the elastic conductive member 481 is placed on the solder paste. In this way, it can save man-hours, the process is simple, the production capacity is high, and the quality is stable. Advantages: Next, the wiring board module 400 is sent into the reflow oven, and the solder paste is melted by the high-temperature baking of the reflow oven, so that the elastic conductive member 481 is welded to the first contact 430 . Next, after the electro-acoustic unit 200 is fixed in the recessed portion 110, the circuit board end cover 300 is directly covered to the end face 102 of the cover 100, so that the elastic conductive member 481 can directly abut against the electrical terminals of the electro-acoustic unit 200 (not shown in the figure), thus completing the electroacoustic device 10 of this embodiment. However, the present invention is not limited thereto.

In one embodiment, the sounding body of the electro-acoustic component can be produced using standard materials and standard processes, instead of using high-temperature materials and special processes that can withstand the temperature of the 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 withstand the high-temperature baking of the reflow oven without damage, the assembled electro-acoustic device 10 can be directly sent into the reflow process. In the soldering furnace, the assembly of the wiring board module 400 and the cover 100 does not need to be baked, so that the procedure can be simplified and the manufacturing cost can be reduced.

FIG. 4 is an exploded view of the electroacoustic device 11 according to an embodiment of the present invention. As shown in FIG. 4 , the electroacoustic device 11 of this embodiment is substantially the same as the electroacoustic device 10 ( FIG. 3B ) of the previous embodiment. On the flange 120 of the end face 102 of the cover 100 . The second combining portion 470 is a convex structure integrally formed on the bottom surface 421 of the surrounding groove 420 and connected to the circuit area 411A, so that the convex structure and the circuit area 411A have the same plane height. In this way, when the circuit board end cover 301 covers the cover 100 , the circuit board end cover 301 can be fixed on the cover 100 by inserting the protrusion structure into the recess structure, so as not to be easily detached from the cover 100 .

In addition, compared with the electro-acoustic device 10 ( FIG. 3A ) of the foregoing embodiments, these elastic conductive members 481 are springs (such as tower springs or helical compression springs, etc.), whose long axis direction L is perpendicular to the wiring board The first surface 411 of the body 410 is different from the spring. The elastic conductive member 482 in this embodiment is a shrapnel, such as a horizontal shrapnel in the shape of a tilted arm, and gradually moves away from the first side of the wiring board body 410 in the direction of the cover 100. One side 411.

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

More specifically, one side of the side frame unit 500 is fixed in the surrounding groove 420 of the wiring board body 410 and completely surrounds the wiring area 411A. Therefore, the side frame unit 500 surrounds an inner space 510 capable of accommodating the wiring area 411A. The side frame unit 500 is integrally joined to the wiring board body 410 .

For example, the side frame unit 500 is combined on the first surface 411 of the wiring board body 410 by insert molding. Further, the wiring board body 410 has a glue fixing groove 422 . The glue-fixing groove 422 is formed on the bottom surface 421 of the surrounding groove 420 of the wiring board body 410. In this embodiment, the glue-fixing groove 422 is, for example, a through hole, which connects the bottom surface 421 of the surrounding groove 420 and the bottom surface of the wiring board body 410. The second surface 412, however, the present invention is not limited thereto, and the glue fixing groove 422 may also be a blind hole. In this way, when the wiring board body 410 undergoes the embedding and injection process, the side frame unit 500 is formed on the wiring board body 410 , and a part 501 of it flows into the glue groove 422 to improve the attachment of the side frame unit 500 to the wiring board body 410 Therefore, it is not easy to detach from the wiring board body 410 .

In this embodiment, the first combining portion 150 is disposed on the flange 120 of the cover 100 . The second combining portion 520 is formed on the side frame unit 500 instead of the wiring board module 401 . Through the flange 120 protruding into the inner space 510 , the circuit board end cover 302 is assembled on the cover 100 .

More specifically, the first combining portion 150 is formed on the inner side of the flange 120 facing the recessed portion 110 . The second combining portion 520 is formed on the inner wall of the side frame unit 500 facing the inner space 510 , and the second combining portion 520 is complementary in shape to the first combining portion 150 . Therefore, through the mutual coupling of the first coupling portion 150 and the second coupling portion 520 , the circuit board end cover 302 is fixedly connected to the cover 100 . In this embodiment, the first combining portion 150 is a convex structure. The protrusion structure is integrally formed on the inner side of the flange 120 facing the recessed portion 110 . The second combining portion 520 is a concave structure. The recess structure is formed on the inner wall of the side frame unit 500 facing the inner space 510, however, the present invention is not limited thereto. In this way, when the circuit board end cover 302 covers the cover 100 , the circuit board end cover 302 can be fixed on the cover 100 by inserting the protrusion structure into the recess structure, so as not to be easily detached from the cover 100 .

In addition, the cover 100 also has a plurality of sound holes 170 . These sound outlet holes 170 are formed on the closed end 101 and connected to the recessed portion 110 for emitting the sound of the electro-acoustic unit 200 outward.

FIG. 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 of this embodiment is substantially the same as the electroacoustic device 12 ( FIG. 7 ) of the previous embodiment, the difference is that in this embodiment, the first joint 160 is a recess structure, and the recess The structure is formed on the inner side of the flange 120 facing the recessed portion 110 and surrounds the recessed portion 110 . The second combining portion 530 is a convex portion structure. The protrusion structure integrally protrudes from the inner wall of the side frame unit 500 facing the inner space 510 and surrounds the inner space 510 . In this way, when the circuit board end cover 302 covers the cover 100 , the circuit board end cover 302 can be fixed on the cover 100 by inserting the protrusion structure into the recess structure, so as not to be easily detached from the cover 100 .

FIG. 9 is an exploded view of a circuit board end cover 303 according to an embodiment of the present invention. As shown in Figure 9, the circuit board end cover 303 of this embodiment is substantially the same as the circuit board end cover 302 (Figure 7) of the previous embodiment, the difference is that in this embodiment, the circuit board end cover 303 has a solid glue Convex ribs 423 . The glue-fixing rib 423 is integrally formed on the bottom surface 421 of the surrounding groove 420 and connected to the circuit area 411A, so that the glue-fixing rib 423 and the circuit area 411A have the same plane height. In this way, when the wiring board body 410 undergoes the embedding and injection process, the side frame unit 500 is formed on the wiring board body 410, and a part 502 of it flows into the surrounding groove 420, and covers the adhesive rib 423 to improve the side frame. The unit 500 adheres to the bonding strength of the wiring board body 410 so that it is not easily detached from the wiring board body 410 .

Thus, through the above structure, the utility model can simplify the structure of the electro-acoustic device, effectively shorten the overall thickness of the electro-acoustic device, save materials and shorten man-hours, thereby improving the market competitiveness of the product.

Finally, the above-disclosed embodiments are not intended to limit the present utility model. Any person skilled in the art may make various modifications and modifications without departing from the spirit and scope of the present utility model. Be protected in the utility model. Therefore, the protection scope of the present utility model should be defined by the claims.

【Symbol Description】

10～13: Electroacoustic device

100: cover

101: closed end

102: end face

110: depression

111: limit structure

120: Flange

130, 140, 150, 160: the first junction

170: sound hole

200: electroacoustic unit

300～303: circuit board end cover

400, 401: distribution board module

410: Wiring board body

411: first side

411A: Line area

411B: Surrounding area

412: second side

413: Circumferential surface

420: surround groove

421: Bottom

422: glue tank

423: Glue Convex Ribs

430: first contact

440: second contact

450: Wiring Circuits

451: Alignment

452: Through the lead-in part

460, 470: the second junction

481, 482: elastic conductive parts

500: side frame unit

501, 502: part

510: interior space

520, 530: the second joint

AA, BB: line segment

W: maximum width

L: Long axis direction.

Claims (20)

1. An electroacoustic device, characterized in that it comprises: a cover, the end surface of the cover has a concave portion and a first joint portion; an electro-acoustic unit fixed in the recess; and The circuit board end cap, which completely covers the recess, contains: patch panel module; At least one elastic conductive member is fixed on the wiring board module and electrically connects the wiring board module and the electro-acoustic unit; and The second combining part is located on the wiring board module and connected to the first combining part. 2. The electroacoustic device according to claim 1, wherein the wiring board module comprises: a wiring board body having a first surface and a second surface opposite to each other, the first surface is bonded to the end surface of the cover through an adhesive layer, and completely covers 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; and The wiring circuit is arranged in the wiring board body and connected to the first contact and the second contact respectively. 3. The electroacoustic device according to claim 2, wherein the first surface area of the wiring board body is divided into a circuit area and a surrounding groove, the wiring circuit is arranged in the circuit area, and the surrounding groove surrounds the route area; and The end surface of the cover partially projects a flange outwardly, through which the flange extends into the surrounding groove, and the end cover is combined on the cover. 4. The electro-acoustic device according to claim 3, wherein the first joint part is located on the flange of the cover, the second joint part is located on the bottom surface of the surrounding groove of the wiring board body, the The second joint part is complementary in shape to the first joint part, and the first joint part and the second joint part are respectively a concave part structure and a convex part structure, wherein the concave part structure is inserted through the convex part structure, and the circuit board end cover Securely attach the cover. 5. The electroacoustic device according to claim 1, wherein the circuit board end cover further comprises: The side frame unit is fixed between the cover and the wiring board module, wherein the second joint part is formed on the side frame unit. 6. The electroacoustic device according to claim 5, wherein the wiring board module comprises: a wiring board body having a first surface and a second surface opposite to each other, the first surface is integrally joined to the side frame unit; 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 The wiring circuit is arranged in the wiring board body and connected to the first contact and the second contact respectively. 7. The electroacoustic device according to claim 6, wherein the first surface of the wiring board body has a circuit area and a surrounding groove, the wiring circuit is arranged in the circuit area, and the surrounding groove surrounds the In the circuit area, the side frame unit is fixed in the surrounding groove and surrounds the circuit area. 8. The electro-acoustic device according to claim 7, wherein the end surface of the cover partially protrudes from a flange, and the side frame unit surrounds an inner space capable of accommodating the line area, wherein the The flange protrudes into the inner space, and the circuit board end cover is assembled on the cover. 9. The electroacoustic device according to claim 8, characterized in that, the first joint part is formed on the inner side of the flange, the second joint part is formed on the inner wall of the side frame unit facing the inner space, the first joint part The two joint parts are complementary in shape to the first joint part, and the first joint part and the second joint part are respectively a concave part structure and a convex part structure, wherein the convex part structure is inserted into the concave part structure, and the circuit board end cover is fixed Attach the cover. 10. The electro-acoustic device according to claim 1, wherein the maximum width of the wiring board module is equal to the maximum width of the cover. 11. The electro-acoustic device according to claim 1, wherein the electro-acoustic unit is one of a speaker, a microphone and a buzzer. 12. The electro-acoustic device according to claim 1, wherein the elastic conductive member is one of a spring and a shrapnel. 13. A circuit board end cover, characterized in that it is suitable for covering the cover of the electroacoustic device and conducting the electroacoustic unit in the cover, and the circuit board end cover includes: patch panel module; At least one elastic conductive member is fixed on the wiring board module and electrically connected to the wiring board module; and The joint part is located on the wiring board module and is used for connecting the cover. 14. The circuit board end cover according to claim 13, wherein the wiring board module comprises: a wiring board body having a first surface and a second surface opposite to each other; 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 The wiring circuit is arranged in the wiring board body and connected to the first contact and the second contact respectively. 15. The circuit board end cover according to claim 14, wherein the first surface of the wiring board body has a circuit area and a surrounding groove, the wiring circuit is arranged in the circuit area, and the surrounding groove surrounds the line area. 16 . The circuit board end cover according to claim 15 , wherein the joint portion is located on the bottom surface of the surrounding groove of the wiring board body. 17 . 17. The circuit board end cover according to claim 15, further comprising: The side frame unit is fixed in the surrounding groove and surrounds the line area to surround an inner space capable of accommodating the line area, wherein the joint part is formed on the side frame unit. 18. The circuit board end cover according to claim 17, wherein the joint portion is formed on an inner wall of the side frame unit facing the inner space. 19. The circuit board end cover according to claim 13, wherein the maximum width of the wiring board module is equal to the maximum width of the cover. 20. The circuit board end cover according to claim 13, wherein the elastic conductive member is one of a spring and a shrapnel.

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