Welding-free button cell clamp assembling structure

Abstract

A welding-free button battery clamp assembling structure comprises a circuit board and a battery contact piece which is installed on the circuit board in a clamped mode, a battery containing cavity is formed between the battery contact piece and the circuit board, the battery contact piece comprises a top cover and at least two pins extending downwards, and the circuit board is provided with installation guide grooves for the pins to penetrate. The pins are clamped in the installation guide grooves and are in contact conduction with the circuit board, and the tail ends of the pins are provided with S-shaped contact terminals which are in contact conduction with the back face of the circuit board. According to the invention, the tail ends of the pins are provided with the S-shaped contact terminals which are in contact conduction with the back surface of the circuit board, and the S-shaped geometric fluctuation design is utilized to transmit a load to a plurality of wave crests and wave troughs, thereby avoiding local stress concentration, and improving impact toughness.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery field, concretely relates to a welding-free button cell clamp assembly structure. BACKGROUND

[0002] With the development of electronic technology, people have more and more portable electronic products. In order to facilitate people's travel and some other needs, these portable ones become more and more light, and power as an indispensable part, many portable electronic products choose button cell as the source of power supply.

[0003] The Chinese patent with the application number CN201120058690 discloses a button cell clamp, which is characterized in that the button cell clamp comprises a battery rubber sleeve and a contact electrode frame, the contact electrode frame comprises a semicircular cover sheet, a support leg connected to the cover sheet and bent to one side of the cover sheet, a blocking leg connected to the cover sheet and bent to one side of the cover sheet, and a contact leg connected to the cover sheet and bent to one side of the cover sheet, the support leg, the blocking leg and the contact leg are all bent to the same side of the cover sheet, and the cover sheet, the support leg, the blocking leg and the contact leg are an integral component.

[0004] According to the above-mentioned related technology, the inventor believes that button cells are usually applied to small devices such as watches and hearing aids, and these small devices may be frequently moved or accidentally dropped, if the support leg lacks sufficient impact resistance, it may be broken when falling, resulting in poor battery contact and device failure to work. UTILITY MODEL CONTENTS

[0005] The utility model solves the above-mentioned problems existing in the prior art and provides a welding-free button cell clamp assembly structure, so that the support leg has sufficient impact resistance and reduces the phenomenon of poor battery contact caused by the breaking of the support leg when the device falls.

[0006] The utility model solves the technical problems by adopting the technical scheme of a welding-free button cell clamp assembly structure, which comprises a circuit board and a battery contact piece clamped and installed on the circuit board and forming a battery accommodating cavity with the circuit board, the battery contact piece comprises a top cover and at least two downward extending pins, the circuit board is provided with a mounting guide groove for the pins to pass through, the pins are clamped in the mounting guide groove and in contact with the circuit board, and the end of the pin is provided with an S-shaped contact terminal in contact with the back surface of the circuit board.

[0007] By providing the S-shaped contact terminal in contact with the back surface of the circuit board at the end of the pin, the load is transmitted to multiple wave crests and troughs by the geometric undulation design of the S shape, local stress concentration is avoided, and the impact resistance is improved.

[0008] Preferably, the pin includes an extension that connects to the top cover and extends downward, and a limiting portion disposed at the end of the extension, the extension and the limiting portion forming an inverted "T" shape. Structurally, this is more conducive to achieving an S-shaped bend.

[0009] Preferably, the S-shaped contact terminal is formed by bending an extension.

[0010] Preferably, the width of the S-shaped contact terminal is greater than the width of the limiting portion. When the length of the S-shaped contact terminal is less than or equal to the width of the extension portion, the battery contact piece may detach from the circuit board. Therefore, the purpose of this application is to prevent the battery contact piece from detaching from the circuit board, which would prevent electrical connection between the button battery and the battery contact piece.

[0011] Preferably, a connecting portion is provided between the extension portion and the limiting portion, the width of the connecting portion being smaller than the width of the extension portion and the limiting portion, and the extension portion, the connecting portion, and the limiting portion forming an "I"-shaped structure. This structure is more conducive to achieving bending.

[0012] Preferably, the width of the S-shaped contact terminal is greater than the width of the connecting portion. When the length of the S-shaped contact terminal is less than or equal to the width of the connecting portion, the S-shaped contact terminal may detach from the circuit board.

[0013] Preferably, the width of the extension is greater than the width of the S-shaped contact terminal. This structure prevents the extension from passing through the head.

[0014] Preferably, the mounting guide groove includes a limiting hole of the same width as the extension and a mounting hole disposed away from the center and communicating with the limiting hole. After the limiting part passes through the mounting hole, it moves outward, causing the extension to slide into the limiting hole and simultaneously locking the limiting part at the lower outer end of the limiting hole. Providing mounting holes on the circuit board facilitates rapid pin installation. The limiting hole is used to lock the extension, preventing it from sliding and allowing the limiting part to lock at the lower end of the limiting hole, ultimately achieving adhesion between the battery contact piece and the circuit board.

[0015] Preferably, the top cover is provided with a conductive connecting piece folded into the battery receiving cavity, and the end of the conductive connecting piece is elastically pressed against the button battery.

[0016] Preferably, the height of the pin is adapted to the thickness of the coin cell.

[0017] The beneficial effects of the present application are: the application is provided with an S-shaped contact terminal in contact with the back of the circuit board at the end of the pin, and the load is dispersed to multiple wave crests and troughs through multiple bending paths by using the ups and downs of the S-shaped structure, avoiding stress concentration on a single plane and improving impact toughness; meanwhile, the material utilization rate is optimized, and the S-shaped structure can reduce the amount of material used under the same strength. In addition, compared with the traditional straight line shape, the S-shaped contact terminal increases the contact area between the battery contact piece and the circuit board, and further increases the conductive area between the battery contact piece and the circuit board. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Structure schematic view of the battery contact piece and the circuit board of the embodiment one;

[0019] Figure 2 Schematic view of the pin of the embodiment one;

[0020] Figure 3 Schematic view of the S-shaped contact terminal of the embodiment one;

[0021] Figure 4 Schematic view of the top cover of the embodiment one;

[0022] Figure 5 Shape schematic view of the pin of the embodiment one;

[0023] Figure 6 Shape schematic view of the pin of the embodiment two.

[0024] BRIEF DESCRIPTION OF DRAWINGS: 1, battery contact piece; 2, top cover; 21, conductive connecting piece; 3, pin; 31, extension; 32, connecting part; 33, S-shaped contact terminal; 4, circuit board; 41, mounting guide groove; 411, mounting hole; 412, limiting hole; 42, copper-clad area. DETAILED DESCRIPTION

[0025] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined invention purposes, the specific embodiments, structures, features and effects according to the present application are described in detail as follows in combination with the drawings and preferred embodiments.

[0026] Embodiment one

[0027] In combination with Figure 1 and Figure 2 shown, the utility model discloses a kind of exempt from welding button cell clamp assembly structure, including circuit board 4 and the battery contact piece 1 of being clamped and installed on circuit board 4 and being formed battery accommodating cavity with circuit board 4, the battery contact piece 1 includes top cover 2 and at least two downwardly extending pins 3.

[0028] The battery accommodating cavity is used for mounting the button battery. When the button battery needs to be mounted, the button battery is only needed to be buckled into the accommodating cavity, and no other auxiliary tools are needed to complete the mounting.

[0029] In combination Figure 2 and Figure 4 As shown in the drawings, the top cover 2 is provided with a conductive connecting piece 21 which is folded into the accommodating cavity. The conductive connecting piece 21 is integrally formed by stamping the top cover 2. The end of the conductive connecting piece 21 points to the center of the top cover 2, and forms an inclined surface with elasticity. The elasticity of the inclined surface is used to press the button battery tightly, so that the button battery and the conductive connecting piece 21 abut against each other, and a reliable electrical connection is formed.

[0030] In combination Figure 2 and Figure 5 As shown in the drawings, the pin 3 includes an extension 31 which is connected to the top cover 2 and extends downward, and a limiting portion which is arranged at the end of the extension 31. The extension 31 and the limiting portion are integrally formed by stamping or are formed by welding or other forms, so that the extension 31 and the limiting portion form an inverted "T" shape structure.

[0031] In combination Figure 1 and Figure 5 As shown in the drawings, the circuit board 4 is provided with a mounting guide slot 41 for the pin 3 to pass through. The mounting guide slot 41 includes a limiting hole 412 which has the same width as the extension 31, and a mounting hole 411 which is arranged away from the center and penetrates the limiting hole 412. The mounting hole 411 can make the pin 3 pass through the circuit board 4, and realize the quick mounting of the pin 3 without the aid of other auxiliary tools. The limiting hole 412 has the function of clamping the pin 3 and preventing the pin 3 from sliding. In this embodiment, when mounting, radial pressure is applied to the extensions 31 of the two pins 3, and then the limiting portions are respectively inserted into the corresponding mounting holes 411. After the limiting portions pass through the mounting holes 411, the extensions 31 are loosened. At this time, the extensions 31 will be clamped in the limiting holes 412 due to the elastic deformation of the extensions 31, and at the same time, the limiting portions will be clamped and limited outside the lower end of the limiting hole 412.

[0032] Referring to Figure 3 As shown in the drawings, the limiting portion is bent to form an S-shaped contact terminal 33. The load is dispersed to multiple wave crests and troughs through multiple bending paths by using the ups and downs of the S-shaped structure, so that stress concentration on a single plane is avoided, and the impact toughness is improved. At the same time, the material utilization rate is optimized. The S-shaped structure can reduce the amount of material used under the same strength.

[0033] The lower end outside of the limiting hole 412 is covered with a copper-clad area 42, and the side of the S-shaped contact terminal 33 away from the extension 31 realizes surface contact with the circuit board 4. Compared with the traditional straight line shape, the contact area between the battery contact piece 1 and the circuit board 4 is increased, so that the conductive area between the battery contact piece 1 and the circuit board 4 is further increased.

[0034] Furthermore, in order for the S-shaped contact terminal 33 to fit tightly onto the copper-clad area 42, the length of the S-shaped contact terminal 33 should be greater than the width of the extension 31. If the length of the S-shaped contact terminal 33 is less than or equal to the width of the extension 31, the S-shaped contact terminal 33 is prone to detaching from the circuit board 4, making it impossible for the button battery to make contact with the battery contact piece 1. Increasing the length of the S-shaped contact terminal 33 can also further increase the conductive area.

[0035] Reference Figure 2 As shown, the height of pin 3 should be adapted to the thickness of the button cell battery. If the height of pin 3 is too high, it may not be able to contact the positive and negative terminals of the button cell battery, resulting in a broken circuit. If the height of pin 3 is too low, on the one hand, it may not be possible to install the button cell battery smoothly into the receiving cavity. On the other hand, even if it can be installed smoothly into the receiving cavity, it may cause damage to the button cell battery or deformation of the battery contact piece 1 due to excessive pressure applied to the battery contact piece 1.

[0036] Example 2

[0037] Reference Figure 6 As shown, the difference between this embodiment and Embodiment 1 is that a connecting part 32 is provided between the extension part 31 and the limiting part. The extension part 31 and the connecting part 32 are integrally formed. The width of the connecting part 32 is smaller than the width of the extension part 31 and the limiting part. The extension part 31, the connecting part 32 and the limiting part form an "I" shaped structure.

[0038] Meanwhile, to prevent the extension from going through the mounting hole, the width of the extension should be greater than the width of the S-shaped contact terminal, so that the battery contact piece can fit better on the circuit board.

[0039] To ensure that the S-shaped contact terminal 33 can be tightly attached to the copper-clad area 42, the width of the S-shaped contact terminal 33 is greater than the width of the connecting portion 32. This is to prevent the S-shaped contact terminal 33 from detaching from the circuit board 4, which would prevent electrical connection between the button battery and the battery contact piece 1. Furthermore, increasing the length of the S-shaped contact terminal 33 increases the contact area between it and the copper-clad area 42, thereby further increasing the conductive area between the S-shaped contact terminal 33 and the circuit board 4.

[0040] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, as long as the changes or modifications do not deviate from the technical solution of the present application. Any modification, change, equivalent change and modification of the above embodiments made according to the technical essence of the present application still belong to the scope of the technical solution of the present application.

Claims

1. A non-welded button cell battery clip assembly structure, comprising a circuit board (4) and a battery contact sheet (1) which is clamped and mounted on the circuit board (4) and forms a battery accommodating cavity with the circuit board (4), the battery contact sheet (1) comprising a top cover (2) and at least two downwardly extending pins (3), the circuit board (4) being provided with a mounting guide slot (41) for the pins (3) to pass through, the pins (3) being clamped in the mounting guide slot (41) and in contact with the circuit board (4) for conduction, characterized in that, The pin (3) is provided with an S-shaped contact terminal (33) at the end thereof, which is in contact with the back surface of the circuit board (4).

2. The solderless button cell battery clip assembly of claim 1, wherein, The pin (3) comprises an extension (31) connected to the top cover (2) and extending downward, and a limiting portion provided at the end of the extension (31), and the extension (31) and the limiting portion form an inverted "T" shape structure.

3. The solderless button cell battery clip assembly of claim 2, wherein, The S-shaped contact terminal (33) is bent by the limiting portion.

4. The solderless button cell battery clip assembly of claim 3, wherein, The width of the S-shaped contact terminal (33) is greater than that of the extension (31).

5. The solderless button cell battery clip assembly of claim 2, wherein, A connecting portion (32) is provided between the extension (31) and the limiting portion, and the width of the connecting portion (32) is less than that of the extension (31) and the limiting portion, and the extension (31), the connecting portion (32) and the limiting portion form a "H" shape structure.

6. The solderless button cell battery clip assembly of claim 5, wherein, The width of the S-shaped contact terminal (33) is greater than that of the connecting portion (32).

7. The solderless button cell battery clip assembly of claim 5, wherein, The width of the extension (31) is greater than that of the S-shaped contact terminal (33).

8. The solderless button cell battery clip assembly of claim 2, wherein, The mounting guide slot (41) comprises a limiting hole (412) with the same width as the extension (31), and a mounting hole (411) provided away from the center of the limiting hole (412) and penetrating the limiting hole (412), and after the limiting portion passes through the mounting hole (411), the extension (31) is slid into the limiting hole (412) and the limiting portion is clamped and limited outside the lower end of the limiting hole (412).

9. The solderless button cell battery clip assembly of claim 1, wherein, The top cover (2) is provided with an electrically-conductive connecting sheet (21) which is bent into the battery accommodating cavity, and the end of the electrically-conductive connecting sheet (21) is in elastic pressure connection with the button cell.

10. The solderless button cell battery clip assembly of claim 1, wherein, The height of the pin (3) is adapted to the thickness of the button cell.

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