WO2024073905A1

WO2024073905A1 - Solder joint protection cover

Info

Publication number: WO2024073905A1
Application number: PCT/CN2022/126660
Authority: WO
Inventors: 林道钟
Original assignee: 湖北亿纬动力有限公司
Priority date: 2022-10-08
Filing date: 2022-10-21
Publication date: 2024-04-11
Also published as: CN218472445U

Abstract

A solder joint protection cover, comprising a protection cover body (100), wherein the protection cover body (100) is provided with connection portions (110) and an adhesive-limiting window (120); the protection cover body (100) can be fixed on a circuit board (210) by means of the connection portions (110), and clamp and fix a flat cable (220) to the circuit board (210); and when the protection cover body (100) is fixed on the circuit board (210), solder joints formed by welding the flat cable (220) to the circuit board (210) are exposed within the adhesive-limiting window (120).

Description

Solder joint protection cover

This application claims the priority of the Chinese patent application filed with the China Patent Office on October 8, 2022, with application number 202222647517.2. The entire contents of the above application are incorporated by reference into this application.

Technical Field

The present application relates to the technical field of solder joint glue dispensing, for example, to a solder joint protection cover.

Background technique

FFC flexible flat cable is a new type of data cable made of PET insulation material and extremely thin tinned flat copper wire, hereinafter referred to as flat cable. Flat cable is pressed together through a high-tech automated equipment production line. It has the advantages of being soft, easy to bend and fold, thin, small in size, simple to connect, easy to disassemble, and easy to solve electromagnetic shielding (EMI).

At present, after soldering the flexible flat cable on the circuit board, it is generally necessary to glue the solder joints. Because the flexible flat cable is wide and the glue has a certain fluidity, glue overflow will occur during glue application, resulting in too little glue on the solder joints and failure to protect the solder joints. In addition, when the flexible flat cable is pulled, the stress is mostly concentrated near the solder joints, and the glue and solder joints are very easy to fall off the circuit board.

Summary of the invention

The present application provides a solder joint protection cover, which can prevent glue overflow, allow the glue to completely cover the solder joint, and prevent excessive stress at the solder joint, thereby avoiding the glue and solder joint from falling off.

The present application embodiment provides a solder joint protection cover, including:

The solder joint protection cover can be installed on the circuit board and fix the flat cable. The solder joint protection cover includes a protection cover body, and the protection cover body is provided with a connecting portion and a glue limiting window; wherein,

The protective cover body can be fixed on the circuit board through the connecting portion and clamp the flat cable on the circuit board;

When the protective cover body is fixed on the circuit board, the welding points formed by welding the flat cable and the circuit board are exposed in the glue limiting window.

In one embodiment, a clearance groove connected to the adhesive limiting window is provided on the bottom surface of the protective cover body, and the flat cable can be placed in the clearance groove so that the surface of the clearance groove is in contact with the surface of the flat cable and presses the flat cable against the circuit board.

In one embodiment, a plurality of the connecting portions are disposed on the peripheral side of the protective cover body.

In one embodiment, the protective cover body has a rectangular shape, one connecting portion is disposed on each of two short sides of the protective cover body, and/or two connecting portions are symmetrically disposed on one long side of the protective cover body.

In one embodiment, the connecting portion includes an extension plate disposed on the peripheral side of the protective cover body and a buckle disposed on the bottom surface of the extension plate;

The circuit board is provided with a clamping hole, and the protection cover body is clamped with the clamping hole through the buckle to be fixed on the circuit board.

In one embodiment, the buckle includes a plurality of extension arms arranged at intervals, the plurality of extension arms are surrounded in a ring shape, and a clamping protrusion is provided at the end of the extension arm.

In one embodiment, a through hole is provided on the extension plate, a crossbeam is provided in the through hole, both ends of the crossbeam are in contact with the inner side surface of the through hole, and the plurality of extension arms are placed on the crossbeam.

In one embodiment, a central hole is provided on the crossbeam, and the central hole is arranged corresponding to the center of the ring surrounded by the plurality of extension arms.

In one embodiment, a plurality of limiting posts are provided on the bottom surface of the protective cover body, a plurality of limiting holes corresponding to the limiting posts are provided on the circuit board, and when the protective cover body is fixed on the circuit board, the limiting posts are inserted into the limiting holes.

In one embodiment, the cross-sectional shape of the limiting column is square, circular or triangular.

Beneficial effects of this application:

The solder joint protection cover provided by the present application has a protective cover body that is fixed to the circuit board through a connecting portion and clamps the flat cable with the circuit board, so that the position where the flat cable is stressed is transferred from the solder joint to the position where the protective cover body clamps the flat cable, effectively preventing the glue and solder joint from falling off. In addition, when the protective cover body is fixed to the circuit board, the solder joint is exposed in the glue limiting window, and the glue is dotted into the glue limiting window, and the glue flows in the glue limiting window to prevent the glue from overflowing, and the glue can completely cover the solder joint.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a solder joint protection cover provided by the present application installed on a circuit board;

FIG2 is a schematic diagram of the structure of a solder joint protection cover provided by the present application from one perspective;

FIG3 is a cross-sectional view of a solder joint protection cover provided by the present application;

FIG4 is a schematic structural diagram of a solder joint protection cover provided by the present application from another viewing angle;

FIG. 5 is a schematic structural diagram of the solder joint protection cover provided in the present application from another viewing angle.

In the figure:

100, protective cover body; 110, connecting part; 111, extension plate; 1111, through hole; 1112, crossbeam; 1113, center hole; 112, buckle; 1121, extension arm; 1122, clamping protrusion; 120, glue limiting window; 130, clearance groove; 140, limiting column;

210. Circuit board; 220. Flat cable; 230. Solder joint.

Detailed ways

In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

As shown in FIG. 1 , this embodiment provides a solder joint protection cover, which can be installed on a circuit board 210 and fix a flat cable 220. The solder joint protection cover includes a protection cover body 100, and a connection portion 110 and a glue limiting window 120 are provided on the protection cover body 100. The protection cover body 100 can be fixed on the circuit board 210 through the connection portion 110 and clamp the flat cable 220 with the circuit board 210; when the protection cover body 100 is fixed on the circuit board 210, the solder joint 230 formed by welding the flat cable 220 and the circuit board 210 is exposed in the glue limiting window 120.

In this embodiment, the protective cover body 100 is fixed to the circuit board 210 through the connecting portion 110 and clamps the flat cable 220 with the circuit board 210, so that the position where the flat cable 220 is stressed is transferred from the soldering point 230 to the position where the protective cover body 100 clamps the flat cable 220, effectively preventing the glue and soldering point 230 from falling off. In addition, when the protective cover body 100 is fixed to the circuit board 210, the soldering point 230 is exposed in the glue limiting window 120, and the glue is dotted into the glue limiting window 120, and the glue flows in the glue limiting window 120, preventing the glue from overflowing, and the glue can completely cover the soldering point 230.

In one embodiment, the solder joint protection cover is injection molded.

In this embodiment, as shown in FIGS. 2 and 3 , a clearance groove 130 communicating with the glue limiting window 120 is provided on the bottom surface of the protective cover body 100, and the flat cable 220 can be placed in the clearance groove 130 so that the surface of the clearance groove 130 is in contact with the surface of the flat cable 220 and the circuit board 210 presses the flat cable 220 tightly, and when dispensing glue, the glue can be effectively prevented from overflowing between the bottom surface of the protective cover body 100 and the circuit board 210. In this embodiment, the height H of the clearance groove 130 is equal to the thickness of the flat cable 220, so that the flat cable 220 is pressed against the circuit board 210 by the bottom surface of the clearance groove 130. In one embodiment, the length L of the clearance groove 130 is equal to or slightly greater than the width of the flat cable 220, so as to prevent the glue from overflowing at the edge of the clearance groove 130.

In this embodiment, as shown in Figures 4 to 5, a plurality of connecting portions 110 are provided on the peripheral side of the protective cover body 100 to ensure that the protective cover body 100 is firmly fixed on the circuit board 210, so that the protective cover body 100 can firmly press the flat cable 220 onto the circuit board 210.

It is worth mentioning that the position of the connecting portion 110 is selectively set according to the layout of the electrical components and circuits on the circuit board 210 .

In one embodiment, the outer shape of the protective cover body 100 is rectangular, and a connecting portion 110 is disposed on each of the two short sides of the protective cover body 100, and/or two connecting portions 110 are symmetrically disposed on one long side of the protective cover body 100. In this embodiment, a connecting portion 110 is disposed on each of the two short sides of the protective cover body 100 so that the solder joint protective cover has a smaller size in the width direction, and two connecting portions 110 are symmetrically disposed on one long side of the protective cover body 100 so that the solder joint protective cover has a smaller size in the length direction. The connecting portions 110 are disposed on both of the short sides of the protective cover body 100 and on one long side of the protective cover body 100, so as to have the best connection stability.

In one embodiment, two connecting portions 110 are disposed on one long side of the protective cover body 100 , and a clearance groove 130 is disposed on the other long side, so that the solder joint protective cover has a compact structure.

In this embodiment, referring to Figures 4 to 5, the connecting portion 110 includes an extension plate 111 arranged on the peripheral side of the protective cover body 100 and a buckle 112 arranged on the bottom surface of the extension plate 111. A snap hole is provided on the circuit board 210. The protective cover body 100 is fixed to the circuit board 210 by snapping the buckle 112 with the snap hole, which facilitates the installation and fixation of the protective cover body 100.

In one embodiment, the buckle 112 includes a plurality of extension arms 1121 arranged at intervals, the plurality of extension arms 1121 are enclosed in a ring shape, and a clamping protrusion 1122 is provided at the end of the extension arm 1121. In this embodiment, during the process of clamping the buckle 112 with the clamping hole, the side surface of the clamping protrusion 1122 first abuts against the clamping hole, so that the extension arm 1121 bends inwardly and moves closer, until the clamping protrusion 1122 passes through the clamping hole, the extension arm 1121 returns to its original shape, and the clamping protrusion 1122 is clamped on the end surface of the clamping hole.

In one embodiment, the side surface of the engaging protrusion 1122 is chamfered or rounded.

In one embodiment, a through hole 1111 is provided on the extension plate 111, a cross beam 1112 is provided in the through hole 1111, both ends of the cross beam 1112 are in contact with the inner side surface of the through hole 1111, and a plurality of extension arms 1121 are placed on the cross beam 1112 to increase the toughness of the extension plate 111 and the extension arm 1121, and effectively prevent the extension arm 1121 from breaking when the buckle 112 is engaged with the engaging hole.

In one embodiment, a central hole 1113 is disposed on the crossbeam 1112 , and the central hole 1113 is disposed corresponding to the center of a ring surrounded by the plurality of extension arms 1121 , so as to further increase the toughness of the extension plate 111 and the extension arms 1121 .

In one embodiment, the buckle 112 includes two symmetrically arranged extension arms 1121 located on both sides of the crossbeam 1112 , which can more effectively prevent the extension arms 1121 from breaking during the process of the buckle 112 being engaged with the engaging hole.

In this embodiment, referring to Figures 4 to 5, a plurality of limiting posts 140 are provided on the bottom surface of the protective cover body 100, and a plurality of limiting holes corresponding to the limiting posts 140 are provided on the circuit board 210. When the protective cover body 100 is fixed on the circuit board 210, the limiting posts 140 are inserted into the limiting holes, effectively preventing the protective cover body 100 from shaking on the circuit board 210.

In one embodiment, the cross-sectional shape of the limiting post 140 is square, which can better prevent the protective cover body 100 from shaking on the circuit board 210. Of course, the cross-sectional shape of the limiting post 140 can also be circular, triangular or hexagonal.

In one embodiment, two limiting posts 140 are provided. In one embodiment, the two limiting posts 140 can be respectively provided on two short sides of the protective cover body 100, or can be spaced apart and provided on the long side of the protective cover body 100 where no clearance groove 130 is provided.

Claims

A solder joint protection cover can be installed on a circuit board (210) and fix a flat cable (220), the solder joint protection cover comprising a protection cover body (100), the protection cover body (100) being provided with a connecting portion (110) and a glue limiting window (120); wherein:

The protective cover body (100) can be fixed on the circuit board (210) through the connecting portion (110) and clamp the flat cable (220) with the circuit board (210);

When the protective cover body (100) is fixed on the circuit board (210), the welding point (230) formed by welding the flat cable (220) and the circuit board (210) is exposed in the glue limiting window (120).
The solder joint protection cover according to claim 1, wherein a clearance groove (130) communicating with the glue limiting window (120) is provided on the bottom surface of the protection cover body (100), and the flat cable (220) can be placed in the clearance groove (130) so that the surface of the clearance groove (130) is in contact with the surface of the flat cable (220) and presses the flat cable (220) against the circuit board (210).
The solder joint protection cover according to claim 1, wherein a plurality of the connection portions (110) are provided on the peripheral side of the protection cover body (100).
The solder joint protection cover according to claim 3, wherein the outer shape of the protection cover body (100) is rectangular, one of the connection parts (110) is provided on each of the two short sides of the protection cover body (100), and/or two of the connection parts (110) are symmetrically provided on one long side of the protection cover body (100).
The solder joint protection cover according to claim 1, wherein the connection portion (110) comprises an extension plate (111) arranged on the peripheral side of the protection cover body (100) and a buckle (112) arranged on the bottom surface of the extension plate (111);

The circuit board (210) is provided with a snap-fit hole, and the protective cover body (100) is snap-fitted with the snap-fit hole through the snap buckle (112) to be fixed on the circuit board (210).
The solder joint protection cover according to claim 5, wherein the buckle (112) comprises a plurality of extension arms (1121) arranged at intervals, the plurality of extension arms (1121) are surrounded in a ring shape, and a clamping protrusion (1122) is provided at the end of the extension arm (1121).
The solder joint protection cover according to claim 6, wherein a through hole (1111) is provided on the extension plate (111), a crossbeam (1112) is provided in the through hole (1111), both ends of the crossbeam (1112) are in contact with the inner side surface of the through hole (1111), and the plurality of extension arms (1121) are placed on the crossbeam (1112).
The welding point protection cover according to claim 7, wherein a center hole (1113) is provided on the crossbeam (1112), and the center hole (1113) is arranged corresponding to the center of the ring enclosed by the plurality of extension arms (1121).
According to any one of claims 1 to 8, a solder joint protection cover is provided on the bottom surface of the protection cover body (100), and a plurality of limiting holes corresponding to the limiting columns (140) are provided on the circuit board (210), and when the protection cover body (100) is fixed on the circuit board (210), the limiting columns (140) are inserted into the limiting holes.
The solder joint protection cover according to claim 9, wherein the cross-sectional shape of the limiting column (140) is square, circular or triangular.