WO2020258215A1

WO2020258215A1 - Sound producing device

Info

Publication number: WO2020258215A1
Application number: PCT/CN2019/093562
Authority: WO
Inventors: 任璋
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-12-30
Also published as: CN210351611U

Abstract

A sound producing device, comprising an upper case (10), a lower case (20) ultrasonically welded to the upper case (10) forming an accommodating cavity (22), a sound producing member (30) fixedly accommodated in the accommodating cavity (22), and a flexible circuit board (40) having one end electrically connected to the sound producing member (30) and the other end extending out of the accommodating cavity (22); the lower case (20) comprises a case body (201), and an outlet wire carrying portion (21) and a wire management slot edge (23) extending from a side edge of the case body (201) towards a direction away from the case body (201), the upper case (10) is provided with an outlet wire pressing portion (11) which covers the outlet wire carrying portion (21) to form a wire outlet; the flexible circuit board (40) passes through the wire outlet (100), the wire management slot edge (23) abuts against and positions the flexible circuit board (40), and the wire management slot edge (23) is aligned with and connected to the outlet wire carrying portion (21) to form a glue supplement through hole (211). The sound producing device can effectively position and fix the flexible circuit board (40) when the flexible circuit board (40) is arranged, and can prevent glue from flowing out during supplement.

Description

Sound device

Technical field

The invention relates to the technical field of acoustic equipment, in particular to a sound generating device.

Background technique

The prior art sounding device includes a lower shell, an upper shell forming a receiving cavity with the lower shell, and a sounding monomer fixedly housed in the receiving cavity. In the process of assembling the sounding monomer in the receiving cavity, a flexible circuit board is required For simultaneous assembly, after welding the soldering feet of the flexible circuit board with the pads on the sounding monomer, the flexible circuit board needs to be placed on the lower shell, then the sounding monomer is placed, and then the upper shell is covered on the lower shell At this time, the flexible circuit board protrudes from the outlet formed by the upper shell and the lower shell. In the current technology, the position of the lower shell at the outlet port is designed to be hollowed out, so that the flexible circuit board is filled with glue at the hollowed out position to meet the sealing requirements of the receiving cavity. However, after the position of the lower shell at the mouth is hollowed out, it not only fails to meet the positioning requirements of the flexible circuit board and cannot effectively fix the flexible circuit board, but also the glue easily flows out during the glue sealing process to cause pollution or accumulation. .

Therefore, it is necessary to provide a new outlet sealing structure of the sound device to solve the problems existing in the current technology.

technical problem

The object of the present invention is to provide a sound generating device, which can effectively locate and fix the flexible circuit board when the flexible circuit board is arranged, and can prevent the glue from flowing out when the glue is repaired.

Technical solutions

The technical scheme of the present invention is as follows:

A sounding device includes an upper shell, a lower shell ultrasonically welded with the upper shell to form a receiving cavity, a sounding monomer fixedly housed in the receiving cavity, and a flexible circuit board whose one end is electrically connected to the sounding monomer and the other end extends out of the receiving cavity, The lower shell includes a shell body, a cable bearing portion and a cable management groove extending from the side of the shell body in a direction away from the shell body. The upper shell is provided with a cable covering and pressing portion that is opposite to the cable bearing portion to form a cable outlet. The circuit board passes through the wire outlet, the edge of the wire management groove presses and locates the flexible circuit board, and the edge of the wire management groove is opposite to and connected with the wire outlet carrying part to form a glue filling through hole.

Further, the edge of the cable management groove is arranged at the corner position where the side edge of the shell body is connected with the outlet carrying portion.

Further, a part of the side of the cable management groove is arranged on the side of the shell body, and the other part is vertically extended out of the side of the shell body and is opposite to the outlet carrying portion and connected to form a glue filling through hole.

Further, part of the side of the cable management groove on the side of the shell body and another part of the side of the cable management groove form a rounded corner with a circular arc transition, and the rounded corner is pressed on the flexible circuit board.

Further, the glue filling through hole is a waist-shaped hole, and the waist length of the glue filling through hole is greater than the width of the flexible circuit board.

Further, both sides of the glue filling through hole in the width direction of the flexible circuit board are set beyond both sides of the flexible circuit board.

Further, a positioning double-sided adhesive that is adhered to all three is provided between the flexible circuit board, the outlet carrying portion and the edge of the cable management groove, and the shape of the positioning double-sided adhesive is the same as that of the flexible circuit board.

Beneficial effect

The beneficial effects of the present invention are:

The outlet end of the flexible circuit board is pushed out and positioned by the edge of the cable management groove, and then repairs the glue through the glue filling through hole, so that the flexible circuit board and the outlet carrying part, the edge of the cable management groove and the outlet pressure part are all A good seal is formed; the flexible circuit board is compressed and fixed at the outlet of the wire by the edge of the wire management groove, the outlet carrying part and the outlet pressing part; and the glue filling through hole encloses the glue so that the glue no longer overflows, thereby avoiding This solves the problem of pollution or accumulation caused by glue outflow.

Description of the drawings

Figure 1 is a schematic diagram of the assembly structure of the sound generating device of the present invention;

Figure 2 is an exploded view of Figure 1;

3 is a schematic diagram of the structure of the upper shell and the lower shell of the sound device of the present invention;

4 is a schematic diagram of the structure of the lower shell and the upper shell of the sound device of the present invention;

Figure 5 is an enlarged view of A in Figure 4;

Fig. 6 is a structural schematic diagram of the lower shell of the sound device of the present invention opposite to the upper shell;

Fig. 7 is a schematic diagram of the assembly structure of the sound generating unit of the generating device of the present invention.

Embodiments of the invention

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "Bottom", "Inner", "Outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implicitly referring to The device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this application, "multiple" means two or more than two, unless otherwise specifically defined.

The present invention will be further described below with reference to the drawings and embodiments.

As shown in Figures 1 to 6, the sounding device provided by the present invention includes an upper shell 10, a lower shell 20 ultrasonically welded to the upper shell 10 to form a receiving cavity 22, a sounding monomer 30 fixedly housed in the receiving cavity 22, and one end connected with The sounding unit 30 is electrically connected to the flexible circuit board 40 whose other end extends out of the accommodating cavity 22. The lower housing 20 includes a housing main body 201 and a cable carrying portion 21 and a cable management extending from the side of the housing main body 201 toward a direction away from the housing main body 201 Groove side 23 (the cable management groove side 23 also extends from the side of the shell body 201 toward the direction away from the shell body 201), the upper shell 10 is provided with an outlet covering pressure portion 11 that is opposite to the outlet carrying portion 21 and forms an outlet opening 100 The flexible circuit board 40 passes through the cable outlet 100, the edge 23 of the cable management groove presses and locates the flexible circuit board 40, and the edge 23 of the cable management groove faces the cable outlet carrying portion 21 and is connected to form a glue filling through hole 211.

In the process of assembling the sounding device, first place the sounding monomer 30 in the accommodating cavity 22 of the lower housing 20, and at the same time, place the flexible circuit board 40 (FPC) corresponding to the connection pads of the sounding monomer 30 and place the flexible circuit board 40 The soldering feet of the horns are welded to the connection pads of the sounding monomer 30, and then the upper shell 10 is covered on the lower shell 20 for ultrasonic welding. At this time, the outlet end of the flexible circuit board 40 passes through the outlet port 100 and is pressed and positioned by the edge of the cable management groove 23, and then repairs the glue through the glue filling through hole 211, so that the flexible circuit board 40 is connected to the outlet carrying portion 21 and A good seal is formed between the wire groove side 23 and the outlet pressing portion 11, and because the position of the lower shell 20 of the wire outlet 100 is not hollowed out as the current technology, but the wire management groove side 23 is designed to be flexible The circuit board 40 is positioned under pressure and sealed through the glue filling through hole 211. In this way, the flexible circuit board 40 at the outlet 100 can be covered by the edge 23 of the cable management groove, the outlet carrying portion 21 and the outlet pressing portion 11 The coordinated compression is positioned and fixed, so that the flexible circuit board 40 is easy to be positioned during the assembly process and the installation is more stable. Moreover, when the glue filling through hole 211 is used for glue filling, the glue will no longer overflow because the glue filling through hole 211 encloses the glue, thereby avoiding the problem of pollution or accumulation caused by glue outflow.

As shown in FIG. 1 and FIG. 5, the cable management groove side 23 is provided at the corner position where the side of the shell main body 201 and the outlet carrying portion 21 are connected. Specifically, a part of the cable management groove 23 is provided on the side of the shell body 201, and the other part of the cable management groove 23 extends vertically out of the side of the shell main body 201, and this vertically extends out of the side of the shell body 201. The wire groove side 23 is opposite to the outlet carrying portion 21 and connected to form a glue filling through hole 211. In this way, when the flexible circuit board 40 has the outlet 100 extending out, the two parts of the edge 23 of the cable management groove press and position the flexible circuit board 40 at the same time, and the design position of the outlet 100 for extending the flexible circuit board 40 is further optimized. Moreover, the cable management groove edge 23 composed of these two parts can be pressed and positioned in two directions perpendicular to the extension direction of the flexible circuit board 40 and parallel to the extension direction of the flexible circuit board 40, so that the flexible circuit board 40 is installed during installation. The shape positioning is more stable and effective.

Further, in the present invention, a rounded corner 231 with a circular arc transition is formed between the part of the cable management groove 23 on the side of the shell body 201 and the other part of the cable management groove 23 extending from the side of the shell body 201, And the round corner 231 is pressed against the flexible circuit board 40 for positioning. Through the design of the round corner 231, the corner stress generated by the round corner 231 on the flexible circuit board 40 when the flexible circuit board 40 is pressed and positioned is eliminated, thereby helping to ensure the integrity and performance of the flexible circuit board 40.

As shown in Figures 1, 2, 4, and 6, the glue filling through hole 211 designed in the present invention is a waist-shaped hole, and the waist length of the glue filling through hole 211 is greater than the width of the flexible circuit board 40, which ensures that the flexible circuit board 40 is After aligning the glue filling through hole 211 during assembly, the glue filling through hole 211 still has a gap for the glue to flow to the outlet pressing portion 11, which makes the glue filling and sealing effect more remarkable.

As shown in FIG. 1, both sides of the glue filling through hole 211 along the width direction of the flexible circuit board 40 are set beyond the two sides of the flexible circuit board 40. In this way, during the glue filling process, the glue flows from both sides of the flexible circuit board 40 to the outlet pressure part 11 to form a glue filling seal, which improves the efficiency of glue filling and sealing.

As shown in FIG. 2, in the present invention, a positioning double-sided tape 50 adhered to both is provided between the flexible circuit board 40 and the outlet carrying portion 21, and the shape of the positioning double-sided tape 50 is consistent with that of the flexible circuit board 40. Same shape. Moreover, the width of the positioning double-sided tape 50 in the width direction of the flexible circuit board 40 is less than or equal to the width of the flexible circuit board 40. In the present invention, the width of the positioning double-sided tape 50 is preferably equal to the width of the flexible circuit board 40. This makes it easier for the positioning double-sided tape 50 to be aligned and bonded with the surface of the flexible circuit board 40. In the process of arranging the flexible circuit board 40, the flexible circuit board 40 is temporarily positioned on the outlet carrying portion 21 by the positioning double-sided tape 50, and the positioning double-sided tape 50 and the glue filling through hole 211 are arranged directly opposite, so that the flexible circuit The board 40 will not shift when the cover 10 is closed, so as to ensure accurate assembly of the flexible circuit board 40 and accurate placement of the flexible circuit board 40 relative to the glue through hole 211, thereby facilitating subsequent glue sealing. .

As shown in FIG. 7, the sound emitting unit in the sound emitting device of the present invention includes a basin frame 31 with a receiving space, a magnetic circuit system 33 assembled in the receiving space, and one end fixedly connected to the basin frame 31 and the other end inserted into the receiving space. The vibration system 32 that generates a magnetic induction effect between the magnetic circuit system 33, and the vibration system 32 vibrates and produces sound due to the magnetic induction effect between the magnetic circuit system 33. As shown in FIG. 2, in the process of placing the sounding monomer 30 in the receiving cavity 22 of the lower case 20, the flexible circuit board 40 (FPC) corresponding to the connection pad of the sounding monomer 30 is placed and the flexible circuit board The solder feet of 40 and the connection pads of the sounding monomer 30 are welded, and the flexible circuit board 40 is arranged and its emergence end is extended along the outlet port 100, and then the upper shell 10 is closed on the lower shell 20, and then Ultrasonic welding, and finally the glue filling and sealing operation is performed through the glue filling through hole 100 to achieve a good sealing effect on the flexible circuit board 40 at the outlet 100.

The above are only the embodiments of the present invention. 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 invention, but these all belong to the present invention. The scope of protection.

Claims

A sounding device includes an upper shell, a lower shell that is ultrasonically welded to the upper shell to form a receiving cavity, a sounding monomer fixedly accommodated in the receiving cavity, and one end is electrically connected to the sounding monomer and the other end extends out of the receiving cavity The flexible circuit board of the cavity is characterized in that: the lower shell includes a shell body, and the outlet carrying portion and the cable management groove edge extending from the side of the shell body in a direction away from the shell body. The shell is provided with an outlet pressing portion which is opposite to cover the outlet carrying portion to form an outlet, the flexible circuit board is penetrated through the outlet, and the flexible circuit board is pressed and positioned by the edge of the cable management groove, and The edge of the wire management groove is opposite to and connected to the outlet carrying portion to form a glue filling through hole.
The sounding device according to claim 1, wherein the side of the cable management groove is provided at a corner position where the side of the main body of the casing is connected with the outlet carrying portion.
The sounding device according to claim 2, wherein a part of the side of the cable management groove is provided on the side of the shell body, and the other part extends vertically out of the side of the shell body and is connected to the outlet line. The supporting parts are opposite and connected to form a glue filling through hole.
The sounding device according to claim 3, wherein a part of the side of the wire management groove on the side of the shell body and another part of the side of the wire management groove form a rounded corner of the arc transition, and the circle The corners are pressed on the flexible circuit board.
3. The sound generating device according to claim 3, wherein the glue filling through hole is a waist-shaped hole, and the waist length of the glue filling through hole is greater than the width of the flexible circuit board.
5. The sound generating device according to claim 5, wherein both sides of the glue filling through hole in the width direction of the flexible circuit board are set beyond both sides of the flexible circuit board.
3. The sound generating device according to claim 3, characterized in that: a positioning double-sided adhesive that adheres to all three is provided between the flexible circuit board, the outlet carrying portion, and the edge of the cable management groove, and The shape of the positioning double-sided tape is the same as the shape of the flexible circuit board.