WO2021000091A1 - Speaker - Google Patents

Abstract

Provided is a speaker, comprising: a housing having an accommodation space; and a speaker unit accommodated inside the accommodation space. The speaker unit comprises a sound emission surface and a back surface arranged opposite to each other, and a side surface connecting the sound emission surface and the back surface. The back surface is provided with exposed conductive terminals electrically connected to the speaker unit. The housing comprises: a top wall corresponding to the sound emission surface; a bottom wall opposite to the top wall; and side walls extending from edges of the top wall toward the bottom wall. The accommodation space is bounded by the top wall, the bottom wall and the side walls. The speaker further comprises: a circuit board fixed at the housing and electrically connected to the conductive terminals; and solder tabs connected between the conductive terminals and the circuit board, wherein each solder tab comprises a first extension portion fixed at the back surface and corresponding to the conductive terminal and a second extension portion extending from the first extension portion to the bottom wall, and the circuit board is electrically connected to the conductive terminal by means of the second extension portion. In the present invention, connection with a speaker unit is established by means of solder tabs, thereby solving the problem in which a conventional flexible circuit board is too wide and interferes with a cover plate.

Description

A kind of speaker Technical field

The utility model relates to the field of sound generating devices, in particular to a loudspeaker.

Background technique

As shown in FIG. 1, the structure of the existing loudspeaker is schematically shown. The sound emitting unit 3 is placed in the receiving cavity of the cover plate 1A, and the circuit board 4 is directly welded to the pad of the sound emitting unit 3. With the increasing miniaturization and refinement of product design, the cover frame of the product is getting smaller and smaller. In some extreme cases, the circuit board will interfere with the cover frame even if the circuit board is wired according to the limit. In the case of the figure, due to the circuit The width of the board 4 is too large to be completely contained in the cover 1A. The cover 1A and the circuit board 4 have an overlapping area S, and the two interfere.

In view of the above problems, currently only the cover design can be modified and the frame of the cover can be expanded outward, but this will increase the volume of the product. Therefore, the existing technology has yet to be developed.

technical problem

The purpose of the present invention is to provide a loudspeaker, which aims to solve the problem of interference between the cover plate and the flexible circuit board due to the limitation of the width of the flexible circuit board in the prior art.

Technical solutions

In order to solve the above technical problems, the technical solution of the present invention is as follows:

A speaker has a housing with an accommodation space and a sound emitting unit accommodated in the accommodation space. The sound emitting unit includes a sound emitting surface and a back surface arranged oppositely, and a side surface connecting the sound emitting surface and the back surface, The back surface is exposed with conductive terminals electrically connected to the sound emitting unit, and the housing includes a top wall corresponding to the sound emitting surface, a bottom wall opposite to the top wall, and a bottom wall from the top wall. A side wall with an edge extending toward the bottom wall, the top wall, the bottom wall, and the side wall enclose the accommodating space. The speaker further includes a side wall fixed to the housing and electrically connected to the conductive terminal. A connected circuit board, the speaker further includes a soldering tab connected between the conductive terminal and the circuit board, the soldering tab including a first extension fixed on the back surface and corresponding to the conductive terminal, And a second extension part extending from the first extension part to the bottom wall, and one end of the circuit board close to the sound emitting unit is fixed to the bottom wall and is connected to the conductive part via the second extension part. The terminals are electrically connected.

Beneficial effect

In the loudspeaker provided by the utility model, the circuit board is connected with the sounding unit through soldering pieces, instead of directly welding the circuit board on the surface of the sounding unit, the width of the circuit board can be greatly reduced without interference with the casing, and the welding pieces It is fixed on the side surface of the sounding unit and will not interfere with the casing, thereby avoiding the problem of interference between the circuit board and the cover plate due to the traditional connection method. The first bending part also plays a role in conduction and The function of fixing, the connection between the circuit board and the soldering sheet does not require welding operation, and the technical solution is simple to assemble and suitable for mass production.

Description of the drawings

Fig. 1 is a schematic diagram of interference between a circuit board and a cover plate in the prior art;

Figure 2 is a perspective view of an embodiment of a speaker of the utility model;

Figure 3 is an exploded view corresponding to Figure 2;

Figure 4 is a perspective view of an embodiment of a solder tab of the utility model;

Figure 5 is a structural diagram of the first embodiment of the utility model for connecting two solder tabs;

Figure 6 is a structural diagram of the second embodiment of the connection of two solder tabs of the present invention;

Figure 7 is a diagram of the positional relationship between the second boss and the circuit board of the present invention;

Fig. 8 is a cross-sectional view of the internal assembly structure taken along the line A-A of Fig. 2.

The best implementation of the utility model

A speaker has a housing with an accommodation space and a sound emitting unit accommodated in the accommodation space. The sound emitting unit includes a sound emitting surface and a back surface arranged oppositely, and a side surface connecting the sound emitting surface and the back surface, The back surface is exposed with conductive terminals electrically connected to the sound emitting unit, and the housing includes a top wall corresponding to the sound emitting surface, a bottom wall opposite to the top wall, and a bottom wall from the top wall. A side wall with an edge extending toward the bottom wall, the top wall, the bottom wall, and the side wall enclose the accommodating space. The speaker further includes a side wall fixed to the housing and electrically connected to the conductive terminal. A connected circuit board, the speaker further includes a soldering tab connected between the conductive terminal and the circuit board, the soldering tab including a first extension fixed on the back surface and corresponding to the conductive terminal, And a second extension part extending from the first extension part to the bottom wall, and one end of the circuit board close to the sound emitting unit is fixed to the bottom wall and is connected to the conductive part via the second extension part. The terminals are electrically connected.

Further, the second extension portion includes a sheet-shaped body fixed on the side surface and an electrical connection portion bent and extended from an end of the sheet-shaped body away from the top wall toward the bottom wall. The sheet-shaped body is bent and extended from the edge of the first extension portion toward the top wall.

Further, the two conductive terminals are exposed on the back surface and insulated from each other, and the solder tabs correspond to the conductive terminals one to one.

Further, the top wall extends in the direction of the bottom wall and is formed with a first boss spaced apart from the sound emitting unit, and the sheet-shaped body is disposed between the side surface and the first boss .

Further, the electrical connection portion includes a support portion attached to the first boss, and a conductive spring foot bent and extended from an end of the support portion away from the sheet-shaped body toward the bottom wall, so The supporting portion and the first extending portion are located on opposite sides of the sheet-shaped body.

Further, the sheet-shaped bodies of the two welding lugs are spaced apart from each other, and the speaker further includes an insulating member connected between the two sheet-shaped bodies.

Further, the circuit board includes a soldering portion stacked on the bottom wall, a bending portion extending from the soldering portion to the top wall, and a bending portion extending from the bending portion and attached to the top wall. A fixed conductive portion, the bottom wall is provided with a second boss protruding toward the top wall, and an end of the conductive portion close to the bent portion is sandwiched between the second boss and the top wall between.

Further, the second boss includes a top surface located at an end of the second boss away from the bottom wall, and an extension surface from a side of the top surface close to the sounding monomer to the bottom wall An end of the conductive portion close to the bending portion is sandwiched between the top surface and the top wall, and the bending portion is attached to the extension surface.

Further, an end of the conductive part away from the second boss forms a pad electrically connected to an external circuit, the pad is exposed on the housing, the pad is provided with a positioning hole, and the top The wall is protrudingly provided with a positioning column matched and installed with the positioning hole.

Further, the housing further includes a mounting wall extending from the top wall toward the bottom wall, and the sound-producing monomer is correspondingly fixed to the mounting wall and spaced apart from the top wall.

Implementation of the utility model

The present utility model will be further explained below in conjunction with the drawings and the embodiments.

The present utility model provides an embodiment of a loudspeaker, as shown in Figures 2 and 3, including a housing with a receiving space, which can be specifically composed of an upper housing 1 and a lower housing 2. The drawings are for showing more details , The upper and lower placement positions are reversed, and the accommodating space contains a sounding monomer 3, the sounding monomer 3 includes a sounding surface 31 and a back surface 32 disposed oppositely, and a side connecting the sounding surface 31 and the back surface 32 On the surface 33, the back surface 32 is exposed with a conductive terminal 34 electrically connected to the sound emitting unit 3; the housing includes a top wall 11 corresponding to the sound emitting surface 31, and a bottom opposite to the top wall 11 The wall 21, and the side wall 14 extending from the edge of the top wall 11 toward the bottom wall 21, the top wall 11, the bottom wall 21 and the side wall 14 enclose the receiving space; preferably The housing may further include a mounting wall 15 extending from the top wall 11 toward the bottom wall 21, and the sound-producing monomer 3 is fixed to the mounting wall 15 and spaced from the top wall 11. Set up. The speaker also includes a circuit board 4 fixed to the casing (upper casing 1 in the figure) and electrically connected to the conductive terminal 34, and connected between the conductive terminal 34 and the circuit board 4 The specific structure of the solder tab is the solder tab 5B as an example. As shown in FIG. 4, it includes a first extension 51 fixed on the back surface 32 and corresponding to the conductive terminal 34, and a The extension portion 51 extends to the second extension portion 52 of the bottom wall 21, and one end of the circuit board 4 close to the sound emitting unit 3 is fixed to the bottom wall 21 and is connected to the bottom wall 21 via the second extension portion 52. The conductive terminal 34 is electrically connected.

In the traditional speaker structure, the circuit board is directly welded to the surface of the sounding unit. When the width of the circuit board is too large, it will interfere with the cover. The speaker provided by the present invention has the circuit board connected to the sounding unit through soldering pieces. The width can be greatly reduced without interference with the cover plate, thereby avoiding the problem of interference between the circuit board and the cover plate due to being too wide in the traditional connection method. The technical solution is simple to assemble and suitable for mass production. In the present invention, the soldering sheet can be made of common conductive materials, such as copper sheets.

Regarding further specific implementations of the soldering tabs, as shown in FIG. 4, the second extension portion 52 includes a sheet-shaped body 521 fixed on the side surface 33 and an end of the sheet-shaped body 521 away from the top wall 11 facing The electrical connection portion 522 is bent and extended in the direction of the bottom wall 21, and the sheet-shaped body 521 is bent and extends from the edge of the first extension portion 51 toward the top wall 11. In this embodiment, the solder lug is fixed to the side surface 33 of the sounding unit 3 by arranging a sheet-shaped body 521, so that the solder lug itself does not interfere with the housing, thereby avoiding the circuit board due to the width and width of the traditional connection method. The shell has interference problem.

Further, two conductive terminals 34 may be provided, as shown in FIG. 3, which are respectively exposed on the back surface 32 and insulated from each other. The two conductive terminals 34 are located on the sounding monomer 3 close to the protrusion. Correspondingly, the opposite ends of one side of the platform 12 are also provided with two soldering tabs, 5A and 5B respectively, which are arranged at intervals, and the soldering tabs correspond to the conductive terminals one by one.

The present invention provides another preferred embodiment. As shown in FIG. 3, the top wall 11 extends toward the bottom wall 21 to form a first boss 12 spaced apart from the sounding monomer 3 The sheet-shaped body 521 is disposed between the side surface 33 and the first boss 12, and the electrical connection part 522 may be specifically configured to include a support part 5221 that is attached to the first boss 12 , And a conductive spring foot 5222 bent and extended toward the bottom wall 21 from an end of the support portion 5221 away from the sheet-shaped body, the support portion 5221 and the first extension portion 51 are located in the sheet-shaped body On opposite sides. In the present invention, the support portion 5221 of the welding sheet is carried by the boss 12 to prevent the second extension portion 52 from being in a suspended state that would generate a downward pulling force, thereby affecting the connection reliability of the welding point. In addition, the conductive spring foot 5222 is in contact with the circuit board 4, and the end of the circuit board 4 close to the sounding unit 3 is fixed to the bottom wall 21, that is, the circuit board 4 is soldered by the conductive spring The feet 5222 and the bottom wall 21 are clamped and fixed (refer to FIG. 8 at the same time). Therefore, it is preferable that the conductive elastic feet 5222 have a certain elasticity and a greater clamping force. Compared with the traditional welding connection, the assembly method of clamping, conducting and fixing is simpler and easy to disassemble. It should be noted that the extension directions of the first extension portion 51 and the support portion 5221 are set according to the structure shown in the figure, and the two extension directions are opposite and perpendicular to the sheet-shaped body 521. In fact, as the design position of the circuit board is different, the extension position, angle, and extension direction can be flexibly adjusted, depending on the specific structural design; the obtuse angle formed by the support portion 5221 and the conductive spring 5222 can also be adjusted according to actual needs For adjustment, it is better to keep the conductive spring foot 5222 to form a certain pressure on the bottom wall 21 as shown, which has a better fixing effect. In this embodiment, the sheet-shaped body 521 is fixed to the side surface 33 of the sounding monomer 3, and then two connecting ends (the first extension 51 and the conductive spring 5222) are respectively extended from the sheet-shaped body 521 and the conductive terminal 34 is connected to the circuit board 4, thereby avoiding the problem that the circuit board 4 is too wide and interferes with the housing in the traditional connection method. The conductive spring 5222 of the soldering piece simultaneously plays a role of conduction and fixation.

In order to facilitate assembly and improve production efficiency and assembly accuracy, preferably, the sheet-shaped body of the solder tab 5A and the sheet-shaped body of the solder tab 5B in the above-mentioned embodiment can be connected through an insulator to form an integrated assembly, so that the pad and 2 When a soldering piece is soldered, only one alignment operation is required. Specifically, as shown in FIG. 5, an insulating sheet 6A can be used to fix on the same surface of the sheet-shaped body of two solder sheets for connection. It is also possible to adopt a fixing method as shown in FIG. 6, using an insulating block 6B to be connected to the gap between the side end faces of the two solder plates of the sheet-shaped body.

The present utility model provides another better embodiment. As shown in FIGS. 3 and 7, the circuit board 4 includes a welding part 41 stacked on the bottom wall 21, and a welding part 41 extends from the welding part 41 to the The bent portion 42 extending from the top wall, and the conductive portion 43 extending from the bent portion 42 and fixed to the top wall 11; at the same time, a second protruding portion is provided on the bottom wall 21 toward the top wall 11 A boss 22, an end of the conductive portion 43 close to the bent portion 42 is sandwiched between the second boss 22 and the top wall 11. In order to have a better fitting and fixing effect, the structure of the second boss 22 can also be provided with a top surface 221 located at an end of the second boss 22 away from the bottom wall 21, and a top surface 221 from the top surface 221 An end of the conductive portion 43 close to the bending portion 42 is sandwiched between the top surface 221 and the top wall 11. In between, the bending portion 42 is attached to the extension surface 222. The assembly diagram of the circuit board 4 is shown in FIG. 8. In this embodiment, by providing the second boss 22 and the inclined surface 222 of the second boss 22, the circuit board 4 is smoothly transitioned from the bottom wall 21 to the top wall 11 and fixed (double-sided tape can be attached), which not only guarantees The adaptability of the connection between the conductive part 43 and the external port is improved, and after being fixed, the circuit board 4 can be prevented from being loosened and causing the welding point to be pulled.

In order to further improve assembly efficiency and assembly accuracy, as shown in FIG. 3, an end of the conductive portion 43 away from the second boss 22 forms a pad 431 electrically connected to an external circuit, and the pad 431 is exposed on the shell The pad 431 is provided with a positioning hole 432, and the top wall 11 is protrudingly provided with a positioning pillar 13 that is matched and installed with the positioning hole 432.

In summary, the present utility model provides a speaker. The circuit board is connected to the pad of the sounding unit through the soldering piece, and the soldering piece is fixed to the side surface of the sounding unit, and then the two connecting ends (the first The extension part and the second extension part) are respectively connected to the conductive terminal and the circuit board, thereby avoiding the problem of interference between the circuit board and the cover plate in the traditional connection method. The second extension part is provided with conductive spring feet to the circuit board. For clamping, the welding process is omitted and the assembly is simpler. On this basis, the present invention avoids reliability problems caused by the addition of solder lugs by adding a boss on the shell, and at the same time, it improves assembly efficiency by setting positioning posts on the cover plate and positioning holes on the circuit board. And assembly accuracy.

The above are only the embodiments of the present utility model. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these all belong to The scope of protection of the utility model.

Claims (10)

A speaker has a housing with an accommodation space and a sound emitting unit accommodated in the accommodation space. The sound emitting unit includes a sound emitting surface and a back surface arranged oppositely, and a side surface connecting the sound emitting surface and the back surface, The back surface is exposed with conductive terminals electrically connected to the sound emitting unit, and the housing includes a top wall corresponding to the sound emitting surface, a bottom wall opposite to the top wall, and a bottom wall from the top wall. A side wall with an edge extending toward the bottom wall, the top wall, the bottom wall, and the side wall enclose the accommodating space. The speaker further includes a side wall fixed to the housing and electrically connected to the conductive terminal. The connected circuit board is characterized in that: the speaker further includes a soldering lug connected between the conductive terminal and the circuit board, and the soldering lug includes a first electrode fixed on the back surface and corresponding to the conductive terminal. An extension portion and a second extension portion extending from the first extension portion to the bottom wall, and one end of the circuit board close to the sound emitting unit is fixed to the bottom wall and passed through the second extension portion It is electrically connected with the conductive terminal. The speaker according to claim 1, wherein the second extension includes a sheet-shaped body fixed on the side surface and a direction from an end of the sheet-shaped body away from the top wall toward the bottom wall. The electrical connection part is bent and extended, and the sheet-shaped body is bent and extended from the edge of the first extension part toward the top wall. The speaker of claim 2, wherein the two conductive terminals are exposed on the back surface and insulated from each other, and the soldering tabs correspond to the conductive terminals one to one. The speaker according to claim 3, wherein the top wall extends toward the bottom wall to form a first boss spaced apart from the sound emitting unit, and the sheet-shaped body is disposed on the side Between the surface and the first boss. The speaker according to claim 4, wherein the electrical connection portion comprises a support portion attached to the first boss, and an end away from the sheet body from the support portion toward the bottom A conductive spring foot extending by bending the wall, and the supporting portion and the first extending portion are located on opposite sides of the sheet-shaped body. The speaker according to claim 5, wherein the sheet-shaped bodies of the two soldering lugs are spaced apart from each other, and the speaker further comprises an insulating member connected between the two sheet-shaped bodies. The speaker according to any one of claims 1-6, wherein the circuit board comprises a welding part stacked on the bottom wall, a bending part extending from the welding part to the top wall, and A conductive portion extending from the bent portion and attached and fixed to the top wall, the bottom wall is provided with a second boss protruding toward the top wall, and the conductive portion is close to one end of the bent portion It is sandwiched between the second boss and the top wall. The speaker according to claim 7, wherein the second boss comprises a top surface located at an end of the second boss away from the bottom wall, and a top surface close to the sound emitting unit from the top surface An extension surface from one side to the bottom wall, one end of the conductive portion close to the bending portion is sandwiched between the top surface and the top wall, and the bending portion is attached to the extension surface . The speaker according to claim 8, wherein the end of the conductive part away from the second boss forms a pad electrically connected to an external circuit, and the pad is exposed on the housing, and The pad is provided with a positioning hole, and the top wall is convexly provided with a positioning post matched and installed with the positioning hole. The speaker according to claim 1, wherein the housing further comprises a mounting wall extending from the top wall toward the bottom wall, and the sound-emitting monomer is correspondingly fixed to the mounting wall and connected to the mounting wall. The top walls are arranged at intervals.