A button battery anti-rejection structure

Abstract

This utility model relates to the field of electronic technology, and in particular to an anti-retraction structure for a button battery. This anti-retraction structure forms a receiving cavity through the cooperation of a circuit board and a spring clip, enabling the button battery to be fixed and connected. The spring clip has a main body portion covering the top of the button battery, a welding portion and a blocking portion at the side and rear end of the main body portion respectively, and a limiting portion connected to the welding portion and extending into the receiving cavity to the lower front end of the main body portion. When the button battery enters the receiving cavity, the welding portion, the blocking portion, and the limiting portion all contact the button battery, forming a fixed structure that clamps on both sides and pushes against from the front and back. This provides good anti-retraction and limiting effects, satisfying the user's needs for disassembling or replacing the button battery, and preventing the button battery from loosening or retracting when encountering vibration, ensuring the stability of the connection and power supply.

Description

Technical Field

[0001] This utility model relates to the field of electronic technology, and in particular to an anti-rejection structure for a button battery. Background Technology

[0002] Button batteries are widely used in portable electronic devices, medical devices, IoT terminals, and consumer electronics products due to their small size, high energy density, and compact structure. These devices typically achieve electrical connection by contacting the battery's positive and negative terminals with a metal spring. The metal spring relies on its own elastic deformation to provide continuous contact pressure, ensuring stable current conduction.

[0003] Currently, an existing Chinese utility model patent, "A Button Battery Fixing Structure" (application number: 201921111788.8), discloses a structure comprising: a PCB board and a battery fixing spring; the battery fixing spring includes a circular spring body and at least two solder feet integrally connected to the circular spring body; the circular spring body has a positive electrode contact structure for a button battery; the at least two solder feet are all located on the same side of the circular spring body along an axis; one end of each solder foot is led out from the circular spring body, and the other end is soldered to the PCB board; the PCB board has a copper-plated area corresponding to the circular spring body, which is a negative electrode contact structure; the area of ​​the negative electrode contact structure is smaller than that of the circular spring body.

[0004] However, although the above structure can achieve the required opening structure for battery installation and removal through the semi-circular side without solder feet, this opening provides room for the battery to be pushed in or out. If it encounters vibration or shaking, it is easy to loosen or move backward, resulting in poor contact. Utility Model Content

[0005] The purpose of this utility model is to provide an anti-retraction structure for button batteries, which addresses the shortcomings of the existing technology and aims to solve the technical problem that existing button batteries are prone to loosening or retraction when exposed to vibration or shaking, resulting in poor contact.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an anti-retraction structure for a button battery, comprising a circuit board, a button battery placed above and connected to the circuit board, and a spring piece covering and connected to the button battery. The spring piece is welded and fixed to the circuit board. The spring piece includes a main body placed above the button battery, two welding parts symmetrically distributed on the central side wall of the main body, and two blocking parts symmetrically distributed on the rear side wall of the main body. The welding parts and the blocking parts are both vertically connected to the main body. The main body, welding parts, blocking parts, and circuit board together form a receiving cavity for accommodating the button battery. The welding parts are connected to a limiting part extending into the receiving cavity to the lower front end of the main body. The limiting part abuts against the side wall of the button battery.

[0007] The present invention is further configured such that: there is a gap between the two limiting parts to form an inlet and outlet for installing or removing the button battery, the inlet and outlet are connected to the receiving cavity, and the length of the inlet and outlet is less than the diameter of the button battery and the receiving cavity.

[0008] The present invention is further configured such that: the limiting part includes a horizontal section connected to the welding part and extending forward, a bent section connected to the horizontal section and bending inward, and a contact section connected to the bent section and bending outward, the bent section extending into the receiving cavity so that the contact section abuts against the button battery.

[0009] The present invention is further configured such that: the main body is provided with at least one window and a crimping section disposed in the window, the crimping section bends downward and extends so that the end is placed below the window, and the crimping section is connected to the positive terminal of the button battery.

[0010] The present invention is further configured such that: the welding part includes a connecting section perpendicularly connected to the main body and a welding section perpendicularly connected to the connecting section, the connecting section and the horizontal section are arranged in the same straight line, the welding section is parallel to the circuit board, and correspondingly, the circuit board is provided with two pads, and the welding section is welded to the pads.

[0011] The present invention is further configured such that the welding section is provided with a through hole.

[0012] The present invention is further configured such that: the circuit board has a copper-plated area, and the copper-plated area is connected to the negative terminal of the button battery.

[0013] The present invention is further configured such that the area of ​​the copper-clad area is smaller than the bottom area of ​​the button battery.

[0014] The present invention is further configured such that the blocking part is a rectangular or arc-shaped structure.

[0015] The present invention is further configured such that the length of the blocking part is less than the thickness of the button battery.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: This utility model forms a receiving cavity through the cooperation of a circuit board and a spring, which can realize the fixation and connection of the button battery. The spring is provided with a main body covering the top of the button battery, a welding part and a blocking part at the side and rear end of the main body, respectively, and a limiting part connected to the welding part and extending into the receiving cavity to the lower front end of the main body. When the button battery enters the receiving cavity, the welding part, the blocking part and the limiting part all contact the button battery, forming a fixed structure that clamps on both sides and pushes against the front and rear. The anti-retraction limiting effect is good, which can not only meet the user's needs for disassembling or replacing the button battery, but also prevent the button battery from loosening or retracting when encountering vibration, thus ensuring the stability of connection and power supply. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is an exploded structural diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of this utility model with the button battery removed;

[0021] Figure 4 This is a schematic diagram of the structure of the spring sheet in this utility model.

[0022] The details of the reference numerals used in the above figures are as follows:

[0023] 1-Circuit board, 11-Solder pads, 12-Copper cladding area;

[0024] 2-Button batteries;

[0025] 3-Spring, 31-Main body, 311-Window, 312-Crimping section, 32-Welding section, 321-Connecting section, 322-Welding section, 323-Through hole, 33-Blocking section, 34-Limiting section, 341-Horizontal section, 342-Bending section, 343-Contact section, 35-Inlet / outlet;

[0026] 4-Receiving cavity. Detailed Implementation

[0027] In the description of this application, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] In the description of this application, the technical terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0029] In order to better understand the above-mentioned objectives, technical solutions and advantages of this application, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings, and to understand in detail how to solve the problems raised in the background art.

[0030] It should be noted that: in this embodiment, one end of the spring piece 3 with the limiting part 34 is the front end, and the other end is the rear end, and the two ends of the welding part 32 are the left and right ends; the anti-retraction structure of this application can be applied to the CGM field, in which the transmitter is worn on the surface of the human body, and the battery will vibrate when the user moves, which can effectively prevent the battery from retracting or loosening. Of course, it can also be applied to electronic products such as controllers and remote controls.

[0031] like Figures 1 to 4 As shown, an anti-retraction structure for a button battery 2 includes a circuit board 1, a button battery 2 placed above and connected to the circuit board 1, and a spring piece 3 covering and connected to the button battery 2. The spring piece 3 is welded and fixed to the circuit board 1. The spring piece 3 includes a main body 31 placed above the button battery 2, two welding parts 32 symmetrically distributed on the central side wall of the main body 31, and two blocking parts 33 symmetrically distributed on the rear side wall of the main body 31. The welding parts 32 and the blocking parts 33 are both vertically connected to the main body 31. The main body 31, the welding parts 32, the blocking parts 33 and the circuit board 1 together form a receiving cavity 4 for accommodating the button battery 2. The welding parts 32 are connected to a limiting part 34 extending into the receiving cavity 4 to the lower front end of the main body 31. The limiting part 34 abuts against the side wall of the button battery 2.

[0032] Through the above solution, the anti-retraction structure of this embodiment forms a receiving cavity 4 through the cooperation of the circuit board 1 and the spring piece 3, which can realize the fixation and connection of the button battery 2. The spring piece 3 is provided with a main body 31 covering the button battery 2, a welding part 32 and a blocking part 33 at the side and rear ends of the main body 31 respectively, and a limiting part 34 connected to the welding part 32 and extending into the receiving cavity 4 to the lower front end of the main body 31. When the button battery 2 enters the receiving cavity 4, the welding part 32, the blocking part 33 and the limiting part 34 all contact the button battery 2, forming a fixed structure that clamps on both sides and pushes against the front and rear. The anti-retraction limiting effect is good, which can not only meet the user's needs to disassemble or replace the button battery 2, but also prevent the button battery 2 from loosening or retracting when encountering vibration, thus ensuring the stability of connection and power supply.

[0033] In this embodiment, the button battery 2 is a circular structure and is one of the models CR2025, CR2032, and CR1632; the spring 3 is formed by stamping conductive metal. The main body 31, welding part 32, blocking part 33, and limiting part 34 are integrated structures to ensure structural strength. The welding part 32 and the blocking part 33 have rounded corners at their connection with the main body 31, which can better embed the button battery 2 and avoid wear or shaking. The main body 31 and the button battery 2 are matched so that the main body 31 can cover the top surface of the button battery 2. There are two welding parts 32, two blocking parts 33, and two limiting parts 34, which are symmetrical. The welding part 32 is on the left and right sides of the button battery 2, the blocking part 33 is on the rear side of the button battery 2, and the limiting part 34 is on the front side of the button battery 2. Finally, the welding part 32 is welded and fixed to the circuit board 1 to complete the fixing of the button battery 2.

[0034] like Figure 1 and Figure 3 As shown, in one specific embodiment of the improvement, there is a gap between the two limiting parts 34 to form an inlet / outlet 35 for installing or removing the button battery 2. The inlet / outlet 35 is connected to the receiving cavity 4, and the length of the inlet / outlet 35 is less than the diameter of the button battery 2 and the receiving cavity 4. Specifically, the structure of the receiving cavity 4 matches the button battery 2 to ensure that the button battery 2 is placed in the receiving cavity 4. In practical applications, based on the elastic structure of the limiting parts 34, the spring 3 is first welded and fixed to the corresponding position on the circuit board 1. Then, after aligning the button battery 2 with the inlet / outlet 35, the front end of the button battery 2 is pushed and passes through the inlet / outlet 35 from front to back into the receiving cavity 4. The two limiting parts 34 are squeezed to the left and right sides respectively and then return to their original positions, so that the limiting parts 34 abut against the front sidewall of the button battery 2, thus completing the installation of the button battery 2. When the button battery 2 needs to be removed, only the rear end of the button battery 2 needs to be pushed and passes through the inlet / outlet 35 from back to front to exit the receiving cavity 4, thus completing the removal of the button battery 2. The structure is simple, the disassembly and assembly efficiency is high, and it is beneficial for later maintenance.

[0035] like Figure 1 and Figure 4 As shown, in one specific embodiment of the improvement, the limiting part 34 includes a horizontal section 341 that is connected to the welding part 32 and extends forward, a bent section 342 that is connected to the horizontal section 341 and bends inward, and a contact section 343 that is connected to the bent section 342 and bends outward. The bent section 342 extends into the receiving cavity 4 so that the contact section 343 abuts against the button battery 2. Specifically, the bending segment 342 bends inward toward the button battery 2 or the receiving cavity 4, while the contact segment 343 bends outward toward the opposite direction to the button battery 2 or the receiving cavity 4. This results in the bending directions of the bending segment 342 and the contact segment 343 being opposite. Furthermore, the bending segment 342 bends at an obtuse angle based on the horizontal segment 341, thus forming an elastic lever arm. The contact segment 343 can bend along the side wall of the button battery 2 and then bend upward at its rear end. At the same time, the connection points of the horizontal segment 341, the bending segment 342, and the contact segment 343 have rounded corner structures, which facilitates the entry and exit of the button battery 2, avoids sharp corners from scratching the button battery 2, reduces friction, and ensures the contact area between the contact segment 343 and the button battery 2, thereby improving the stability and robustness of the structure.

[0036] like Figure 1 , Figure 2 and Figure 4 As shown, in one specific embodiment of the improvement, the main body 31 is provided with at least one window 311 and a crimping section 312 disposed within the window 311. The crimping section 312 bends downward and extends so that its end is positioned below the window 311. The crimping section 312 is connected to the positive terminal of the button battery 2. Specifically, in this embodiment, there are two windows 311 that are symmetrically arranged. Each window 311 is provided with a crimping section 312. The shape of the window 311 can be rectangular, circular, or trapezoidal. The crimping section 312 and the main body 31 are integrally formed. The crimping section 312 is embedded in the receiving cavity 4, and the end of the crimping section 312 is curved upward. This increases the contact area between the spring piece 3 and the button battery 2, ensuring the stability of the positive terminal connection, and reduces the friction between the button battery 2 and the contact section 343, ensuring the safety of the button battery 2. At the same time, the crimping section 312 and the circuit board 1 cooperate to clamp the button battery 2 in the vertical direction.

[0037] like Figure 2 and Figure 4As shown, in one specific embodiment of the improvement, the welding part 32 includes a connecting section 321 perpendicularly connected to the main body 31 and a welding section 322 perpendicularly connected to the connecting section 321. The connecting section 321 is arranged in the same straight line as the horizontal section 341, and the welding section 322 is parallel to the circuit board 1. Correspondingly, the circuit board 1 is provided with two pads 11, and the welding section 322 is welded to the pads 11. Specifically, the welding part 32 is composed of the connecting section 321 and the welding section 322 in an L-shaped structure. The connecting section 321 bends downward from the side end of the center of the main body 31, and the connecting section 321 and the horizontal section 341 are an integral structure. The area of ​​the pads 11 is larger than the area of ​​the welding section 322, ensuring the fixed area of ​​the two, thereby improving the stability and firmness of the welding, which is beneficial for the insertion or removal of the button battery 2.

[0038] like Figure 2 and Figure 4 As shown, in one specific embodiment of the improvement, the welding section 322 is provided with a through hole 323. Specifically, the through hole 323 is one of a round hole, a square hole, or a trapezoidal hole. The through hole 323 penetrates the welding section 322, so that the through hole 323 can provide a gas exhaust channel during welding, reduce the formation of pores, and increase the connection area, improve tensile and shear strength, thereby adapting to environments that are prone to vibration or shaking, and further ensuring that the button battery 2 can complete the push-in or push-out operation.

[0039] like Figure 1 and Figure 2 As shown, in one specific embodiment of the improvement, the circuit board 1 is provided with a copper-plated area 12, which is connected to the negative terminal of the button battery 2. The area of ​​the copper-plated area 12 is smaller than the bottom area of ​​the button battery 2. Specifically, the bottom surface of the button battery 2 is the negative terminal. When the button battery 2 is placed in the copper-plated area 12, a negative electrical connection is formed. The copper-plated area 12 is adapted to the structure of the button battery 2. The copper-plated area 12 can be arranged co-centered with the receiving cavity 4 to ensure the stability of the contact area and the negative connection. The soldering segments 322 are distributed on the left and right sides of the copper-plated area 12 to avoid affecting the copper-plated area 12 during soldering.

[0040] like Figure 3As shown, in one specific embodiment of the improvement, the blocking part 33 is a rectangular or arc-shaped structure. Specifically, in this embodiment, the blocking part 33 is a rectangular structure, the area of ​​the main body 31 is adapted to the positive electrode area of ​​the button battery 2, and there is an arc-shaped notch in the main body 31 between the two blocking parts 33, so that the rear end of the button battery 2 is exposed relative to the main body 31. After the button battery 2 is installed, the blocking part 33 abuts against the rear side wall of the button battery 2, which can prevent the button battery 2 from falling off the spring 3, and the arc-shaped notch can provide sufficient space for the button battery 2 to be pushed out. Of course, in some embodiments, the blocking part 33 can also be an arc-shaped structure, thereby increasing the contact area between the blocking part 33 and the side wall of the button battery 2, dispersing stress, and reducing the occurrence of bumps and knocks on the button battery 2.

[0041] like Figure 1 and Figure 3 As shown, in one specific embodiment of the improvement, the length of the blocking part 33 is less than the thickness of the button battery 2 and the height of the receiving cavity 4, so that the blocking part 33 bends downward and contacts the side wall of the button battery 2 but does not contact the circuit board 1, thus avoiding the spring piece 3 from floating or being artificially high during soldering and affecting the product.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model's concept are within the protection scope of this utility model. It should be pointed out that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A button cell anti-rejection structure, characterized in that, The device includes a circuit board, a button battery placed above and connected to the circuit board, and a spring clip placed above and connected to the button battery. The spring clip is soldered to the circuit board. The spring clip includes a main body placed above the button battery, two welding parts symmetrically distributed on the central sidewall of the main body, and two blocking parts symmetrically distributed on the rear sidewall of the main body. The welding parts and the blocking parts are both perpendicularly connected to the main body. The main body, welding parts, blocking parts, and circuit board together form a receiving cavity for accommodating the button battery. The welding parts are connected to a limiting part extending into the receiving cavity to the lower front end of the main body. The limiting part abuts against the sidewall of the button battery.

2. The anti-retraction structure for a button battery according to claim 1, characterized in that, There is a gap between the two limiting portions to form an inlet / outlet for installing or removing the button battery. The inlet / outlet is connected to the receiving cavity, and the length of the inlet / outlet is less than the diameter of the button battery and the receiving cavity.

3. The anti-retraction structure for a button battery according to claim 2, characterized in that, The limiting portion includes a horizontal section connected to the welding portion and extending forward, a bent section connected to the horizontal section and bending inward, and a contact section connected to the bent section and bending outward. The bent section extends into the receiving cavity so that the contact section abuts against the button battery.

4. The anti-retraction structure for a button battery according to claim 1, characterized in that, The main body has at least one window and a crimping section disposed within the window. The crimping section bends downward and extends so that its end is positioned below the window. The crimping section is connected to the positive terminal of the button battery.

5. The anti-retraction structure for a button battery according to claim 3, characterized in that, The welding section includes a connecting section perpendicularly connected to the main body and a welding section perpendicularly connected to the connecting section. The connecting section is arranged in the same straight line as the horizontal section, and the welding section is parallel to the circuit board. Correspondingly, the circuit board is provided with two pads, and the welding section is welded to the pads.

6. The anti-retraction structure for a button battery according to claim 5, characterized in that, The welding section is provided with through holes.

7. The anti-retraction structure for a button battery according to claim 5, characterized in that, The circuit board has a copper-clad area, which is connected to the negative terminal of the button battery.

8. The anti-retraction structure for a button battery according to claim 7, characterized in that, The area of ​​the copper-clad region is smaller than the bottom area of ​​the button battery.

9. The anti-retraction structure for a button battery according to claim 1, characterized in that, The blocking part is a rectangular or arc-shaped structure.

10. The anti-retraction structure for a button battery according to claim 9, characterized in that, The length of the blocking portion must be less than the thickness of the button battery.

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