Button cell connector and use method thereof

Abstract

The invention relates to the technical field of electronics, in particular to a button cell connector and a using method thereof.According to the connector, a PCB is partially hollowed out to form a notch capable of containing a button cell, the thickness space of the PCB can be utilized, a negative electrode elastic piece and a positive electrode elastic piece are symmetrically distributed up and down, a welding pin is welded and fixed to the PCB, and therefore the thickness space of the PCB can be utilized. When the button cell is installed, the button cell enters the notch from the disassembly and assembly opening, the negative elastic piece and the positive elastic piece are matched with the PCB to vertically clamp the button cell, the elastic piece body is connected with the button cell, and when the button cell is disassembled, the button cell can be withdrawn from the notch through the disassembly and assembly opening as long as thrust is applied from the rear end of the button cell and the button cell is pulled out from the front end of the button cell. Therefore, the connector provided by the invention can reduce the space of the whole machine to the greatest extent, is also beneficial to the later maintenance or replacement of the button cell, and is simple in structure and high in safety and stability. The invention also provides a use method of the button cell connector.

Description

Technical Field

[0001] The present invention relates to the field of electronic technology, and particularly to a button battery connector and a method for using the same. Background Art

[0002] A button battery, also known as a coin cell battery, is a small battery shaped like a button, with a relatively large diameter and a thin thickness. They are commonly used in microelectronic products as a backup power source.

[0003] With the development of technology, in order to stably install and connect a button battery to a PCB, most of the existing technologies use a battery compartment structure to fix the button battery, and then set a spring piece on the battery compartment structure to connect the button battery and the PCB. However, the structure of the battery compartment itself is relatively complex and also occupies a large amount of space in the product; in addition, some directly place the button battery on the surface of the PCB and fix and connect it through a fixing spring piece. For example, in the existing utility model patent: a button battery fixing structure (application number: 201921111788.8), where the battery fixing spring piece 2 forms a downward clamping structure from the top surface of the button battery, there is also the problem of directly increasing the thickness of the product.

[0004] Currently, a common button battery fixing structure on the market (see Figure 1 and Figure 2 ), this structure opens a notch on the PCB for placing the button battery, and sets a positive electrode spring piece and a negative electrode spring piece welded to the top surface and the bottom surface of the button battery respectively, which can prevent the button battery from loosening or shifting during vibration. Then, the positive electrode spring piece and the negative electrode spring piece are welded to the PCB board. Although this structure can utilize the thickness space of the PCB board to reduce the overall thickness of the product, the production process is complex, difficult and costly. There are also risks or potential safety hazards when the spring piece is welded to the battery, and the battery cannot be replaced. Summary of the Invention

[0005] In view of this, one of the purposes of the present application is to provide a button battery connector to solve the technical problems that the existing connectors for button batteries will increase the thickness of the product, resulting in large space occupation, and at the same time, the button battery cannot be replaced.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a button battery connector, comprising: A PCB board having a notch for placing a button battery; A positive electrode spring piece disposed below the notch, and the positive electrode spring piece is fixed to the bottom surface of the PCB board; A negative electrode spring piece disposed above the notch, and the negative electrode spring piece is fixed to the top surface of the PCB board; Among them, the negative electrode elastic piece and the positive electrode elastic piece are symmetrically distributed up and down to form a disassembly and assembly opening for the button battery to enter and exit. The notch is connected to the disassembly and assembly opening, and both the positive electrode elastic piece and the negative electrode elastic piece include an elastic piece body connected to the button battery and two welding feet distributed on both side ends of the elastic piece body. The welding feet are fixed to the PCB board by welding.

[0007] Further, the thicknesses of the disassembly and assembly opening, the button battery, and the notch decrease in sequence.

[0008] Further, both the PCB board and the notch are U-shaped structures.

[0009] Further, two welding areas are provided on both the top surface and the bottom surface of the PCB board. The two coplanar welding areas are symmetrically distributed on the left and right sides of the notch, and the welding feet are fixed to the welding areas.

[0010] Further, the welding foot includes a vertical section and a horizontal section perpendicularly connected to the vertical section. The vertical section is perpendicularly connected to the elastic piece body, and the horizontal section is closely attached to the welding area.

[0011] Further, the welding foot and the elastic piece body are of an integral structure, and at least one through hole is provided at the connection between the two or on the welding foot.

[0012] Further, at least one window is provided on the elastic piece body, and an inclined contact section is arranged in the window. One end of the contact section is close to the notch, and the other end of the contact section is connected to the elastic piece body.

[0013] Further, the elastic piece bodies of the positive electrode elastic piece and the negative electrode elastic piece are symmetrically distributed up and down, and the front end of the elastic piece body of the positive electrode elastic piece has a protruding section for assisting in installing the button battery.

[0014] Further, a limiting section is arranged at one end of the protruding section away from the notch, and the limiting section abuts against the side wall surface of the button battery.

[0015] The beneficial effects of the technical solution of this application compared with the prior art are as follows: By partially hollowing out the PCB board to form a notch for placing the button battery, this application can utilize the thickness space of the PCB board. The negative electrode elastic piece and the positive electrode elastic piece are symmetrically distributed up and down, and the welding feet are fixed to the PCB board by welding. When installing the button battery, it enters the notch from the disassembly and assembly opening, and the negative electrode elastic piece and the positive electrode elastic piece clamp the button battery up and down. The elastic piece body is connected to the button battery. When disassembling the button battery, only need to apply a thrust from the rear end of the button battery and pull it out from the front end, then it can exit from the notch through the disassembly and assembly opening, realizing the quick disassembly and assembly of the button battery. Therefore, the connector of this application can minimize the overall machine space, and at the same time is beneficial to the later maintenance or replacement of the button battery. The structure is simple, and the safety and stability are high.

[0016] The second object of the present application is to provide a method for using a button battery connector, comprising the following steps: (1) Provide a notch on the PCB board that matches the button battery, and a plurality of welding areas for welding the positive electrode elastic piece and the negative electrode elastic piece; (2) Weld and fix the welding feet in the welding areas, so that the negative electrode elastic piece and the positive electrode elastic piece form a symmetrical clamping structure above and below the notch; (3) Place the button battery with its positive electrode facing down and horizontally, and align it with the disassembly and assembly opening. At this time, the front end of the button battery first abuts against the surface of the protruding section, and then push the button battery into the notch to complete the installation and fixation of the button battery.

[0017] Through the above-mentioned usage method, the production process can be greatly simplified, the processing difficulty can be reduced, and the production and assembly efficiency can be improved. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only part of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is a schematic structural view of a perspective of button battery assembly in the prior art; Figure 2 is another schematic structural view of a perspective of button battery assembly in the prior art; Figure 3 is a perspective view of the connector of the present invention; Figure 4 is a schematic structural view of the cooperation of the PCB board, the negative electrode elastic piece and the positive electrode elastic piece in the present invention; Figure 5 is a schematic structural view of the PCB board in the present invention; Figure 6 is a schematic structural view of the negative electrode elastic piece in the present invention; Figure 7 is a schematic structural view of one type of the positive electrode elastic piece in the present invention; Figure 8 is another schematic structural view of the positive electrode elastic piece in the present invention.

[0020] Explanation of the reference numerals in the drawings: 1 - PCB board, 11 - notch, 12 - welding area; 2 - negative electrode elastic piece; 3 - Positive electrode elastic piece, 31 - Elastic piece body, 311 - Window, 312 - Contact section, 32 - Welding foot, 321 - Vertical section, 322 - Horizontal section, 33 - Through hole, 34 - Protruding section, 35 - Limiting section; 4 - Disassembly and assembly opening; 5 - Button battery. Specific implementation manner

[0021] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0022] In the description of the present application, the term "a plurality" means two or more (including two). Similarly, "at least one" means one or more (including one). And technical terms such as "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application.

[0023] Throughout the specification, terms such as "including", "having", etc. are used herein to specify the presence of the described features, numbers, steps, operations, elements, components, or combinations thereof, but do not exclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof. Embodiment 1

[0024] It should be noted that in this embodiment, the negative electrode elastic piece 2 or the positive electrode elastic piece 3 can be above or below the PCB board 1, that is, the negative electrode elastic piece 2 and the positive electrode elastic piece 3 cooperate with the PCB board 1 to form an upper and lower clamping fixed structure. In this embodiment, the case where the positive electrode elastic piece 3 is below the PCB board 1 is taken as an example for detailed description.

[0025] As Figures 3 to 7 shown, a button battery connector includes: a PCB board 1 having a notch 11 for placing a button battery 5; a positive electrode elastic piece 3 disposed below the notch 11, and the positive electrode elastic piece 3 is fixed to the bottom surface of the PCB board 1; a negative electrode elastic piece 2 disposed above the notch 11, and the negative electrode elastic piece 2 is fixed to the top surface of the PCB board 1; wherein, the negative electrode elastic piece 2 and the positive electrode elastic piece 3 are symmetrically distributed up and down to form a disassembly and assembly opening 4 for the button battery 5 to enter and exit, the notch 11 is communicated with the disassembly and assembly opening 4, and both the positive electrode elastic piece 3 and the negative electrode elastic piece 2 include an elastic piece body 31 connected to the button battery 5 and two welding feet 32 distributed on both side ends of the elastic piece body 31, and the welding feet 32 are fixed to the PCB board 1 by welding.

[0026] Through the above solution, the thickness space of the PCB board 1 can be utilized, and the overall space of the customer's machine can be minimized. For example, when used in a CGM, the thinner and lighter the CGM is when worn on the human body, the better the experience. At the same time, the quick disassembly and assembly of the button battery 5 can be realized through the disassembly and assembly port 4, which is beneficial to the later maintenance of the button battery 5. The structure is simple, and the safety and stability are relatively high.

[0027] Such as Figure 3 and Figure 4 As shown in the figure, in this embodiment, the positive elastic sheet 3 and the negative elastic sheet 2 can be formed by stamping respectively. After the positive elastic sheet 3 and the negative elastic sheet 2 are in contact with the positive and negative electrodes of the button battery 5 respectively, they are electrically connected, and both the positive elastic sheet 3 and the negative elastic sheet 2 are connected to the PCB board 1, so as to realize the electrical connection and conduction of the button battery 5. The two welding feet 32 of the positive elastic sheet 3 are fixed at both side ends of the bottom surface of the PCB board 1, and the two welding feet 32 of the negative elastic sheet 2 are fixed at both side ends of the top surface of the PCB board 1. And the negative elastic sheet 2 and the positive elastic sheet 3 are symmetrically arranged up and down to form a receiving interval, and the receiving interval is communicated with the notch 11. The button battery 5 is received in the receiving interval and the notch 11. The disassembly and assembly port 4 can be the front opening of the receiving interval, and the rear opening of the receiving interval can be a pushing port. There is a distance between the pushing port and the last end of the notch, which is convenient for applying a thrust when disassembling the button battery 5. The model of the button battery 5 can be CR2032, CR2025 or CR2450.

[0028] Such as Figure 3 As shown in the figure, in this embodiment, the thicknesses of the disassembly and assembly port 4, the button battery 5 and the notch 11 decrease in turn. Specifically, based on the fact that the elastic sheet body 31 is perpendicular to the vertical section 321, the disassembly and assembly port 4 is a rectangular port. The width of the disassembly and assembly port 4 is greater than the thickness of the button battery 5, and the thickness of the notch 11 is the thickness of the PCB board 1, so that when the button battery 5 is received in the notch 11, both ends protrude. It should be noted that: the length of the disassembly and assembly port 4 should be greater than or equal to the diameter of the button battery 5, and the maximum diameter of the notch 11 is the same as the length of the disassembly and assembly port 4, so as to ensure that the button battery 5 can enter and exit from the disassembly and assembly port 4 and be placed in the notch 11.

[0029] Such as Figure 3 and Figure 5 As shown in the figure, in this embodiment, both the PCB board 1 and the notch 11 are U-shaped structures. Specifically, a U-shaped notch 11 is opened on the U-shaped PCB board 1. The rear end of the U-shaped notch 11 is a semi-circular structure matching the button battery 5. After the button battery 5 enters the notch 11, the rear end partial side wall surface of the button battery 5 is attached to the inner wall of the notch 11. At this time, at least more than half of the button battery 5 is placed in the notch 11, that is, the PCB board 1 can limit the button battery 5 to avoid the offset of the button battery 5 and improve the installation stability.

[0030] Such asFigure 4 and Figure 5 As shown, in this embodiment, two welding areas 12 are provided on the top and bottom surfaces of the PCB board 1, and the two coplanar welding areas 12 are symmetrically distributed on the left and right sides of the notch 11, and the welding feet 32 are fixed to the welding areas 12. Specifically, four welding areas 12 are provided at the upper and lower symmetrical positions of the top and bottom surfaces of the PCB board 1, and the welding areas 12 are distributed at the front end of the U-shaped PCB board 1. During actual welding, solder paste can be coated on the welding areas 12, and surface bonding technology is used for automatic welding. The area of the welding area 12 should be larger than the welding bonding area of the welding feet 32 to avoid overflow of the solder paste and ensure welding quality, thereby improving the stability and firmness of fixing the positive spring piece 3 and the negative spring piece 2 and improving production efficiency.

[0031] like Figure 3 and Figure 7 As shown, in this embodiment, the welding foot 32 includes a vertical section 321 and a horizontal section 322 vertically connected to the vertical section 321, the vertical section 321 is vertically connected to the spring body 31, and the horizontal section 322 is tightly fitted with the welding area 12. Specifically, the vertical section 321 and the horizontal section 322 are integrally formed into an L-shaped structure, the horizontal section 322 extends horizontally along one end away from the spring body 31, the horizontal section 322 is placed in the welding area 12 for fixed connection, the vertical section 321 and the spring body 31 are perpendicular to each other, and after connection, they cooperate with the PCB board 1 to enclose the button battery 5 accommodated in the notch 11 to prevent the button battery 5 from loosening or falling out.

[0032] like Figure 6 and Figure 7 As shown, in this embodiment, the welding foot 32 and the spring body 31 are an integrated structure, and at least one through hole 33 is provided at the connection between the two or the welding foot 32. Specifically, in this embodiment, the welding foot 32 and the spring body 31 are made of conductive metal, and two through holes 33 are provided at the connection between each welding foot 32 of the negative spring 2 and the spring body 31, and two through holes 33 are provided at the connection between the vertical section 321 and the horizontal section 322 of each welding foot 32 in the positive spring 3. The above-mentioned through holes 33 will extend to the horizontal section 322, so that the welding foot 32 can provide a climbing range of the solder paste during welding, further increasing the welding area, thereby ensuring the quality and firmness of welding.

[0033] like Figure 6 and Figure 7As shown, in this embodiment, the spring body 31 is provided with at least one window 311, and a contact segment 312 is arranged obliquely in the window 311. One end of the contact segment 312 is close to the notch 11, and the other end of the contact segment 312 is connected to the spring body 31. Specifically, the contact segment 312 is integrally formed with the spring body 31, and each spring body 31 is provided with two side-by-side windows 311, so that each window 311 has a contact segment 312, which can increase the contact area. The window 311 is rectangular, and the contact segment 312 of the negative spring 2 is inclined downward to the bottom of the window 311, and the contact segment 312 of the positive spring 3 is inclined upward to the top of the window 311, that is, the front end of the contact segment 312 is close to the notch 11, and the inclined direction is extended from front to back, which is conducive to the insertion of the button battery 5. The distance between the contact segments 312 of the negative electrode spring sheet 2 and the positive electrode spring sheet 3 is smaller than the thickness of the button battery 5, so that the contact segments 312 abut against the top and bottom surfaces after the button battery 5 enters, thereby realizing the electrical connection of the button battery 5; of course, in order to avoid scratches on the button battery 5 by the contact segments 312, the contact segments 312 can be set to a V-shaped structure with a horizontal surface at the bottom, so that scratches on the contact segments 312 can be avoided regardless of whether the button battery 5 enters or exits, and the replaceable structure enables the button battery 5 to be recycled, thereby improving environmental protection.

[0034] like Figure 4 and Figure 7 As shown, in this embodiment, the spring body 31 of the positive spring piece 3 and the negative spring piece 2 are symmetrical up and down, so that the front end of the spring body 31 of the positive spring piece 3 has a protruding section 34 for assisting the installation of the button battery 5. Specifically, the negative spring piece 2 and the positive spring piece 3 are symmetrical up and down, and from a top view, it can be directly seen that the protruding part of the front end of the positive spring piece 3 is the protruding section 34, that is, the front and rear length of the spring body 31 of the positive spring piece 3 is greater than the front and rear length of the spring body 31 of the negative spring piece 2. When the button battery 5 is installed, the front end of the button battery 5 is first placed on the protruding section 34, thereby forming a guide for the button battery 5 to enter, avoiding the button battery 5 from being unable to align with the disassembly and assembly port 4 when installing, and reducing the phenomenon of the button battery 5 being bumped. Therefore, the protruding section 34 can assist the button battery 5 to enter the notch 11 from the disassembly and assembly port 4, thereby improving production efficiency. Embodiment 2

[0035] like Figure 8As shown in the figure, different from Embodiment 1: In this embodiment, a limiting section 35 is provided at one end of the protruding section 34 away from the notch 11, and the limiting section 35 abuts against the side wall surface of the button battery 5. Specifically, the limiting section 35 has a first inclined portion at the front end, a blocking portion in the middle, and a second inclined portion at the rear end. Among them, both the first inclined portion and the second inclined portion are inclined downward, and the inclination angle can be set according to requirements, but it is necessary to ensure that the first inclined portion is below the button battery 5, and the blocking portion can be a horizontal plane arranged vertically. Of course, the second inclined portion can also be set as a horizontal plane. At this time, the blocking portion and the second inclined portion are perpendicular to avoid excessive pressure concentration when the button battery 5 is pressed down. Based on this, when the button battery 5 is installed, when it is placed from top to bottom onto the protruding section 34, the button battery 5 first contacts the second inclined portion and presses down the limiting section 35 until the protruding section 34 contacts the bottom surface of the button battery 5, and then the button battery 5 is pushed into the notch 11 until the limiting section 35 bounces up. At this time, the blocking portion abuts against the side wall surface of the button battery 5, and cooperates with the positive electrode elastic sheet 3, the negative electrode elastic sheet 2, and the PCB board 1 to clamp and fix the button battery 5, further improving the firmness of the installation of the button battery 5. When the button battery 5 is disassembled, only need to press the second inclined portion of the limiting section 35. When the second inclined portion is at the lower position of the button battery 5, push it from the rear end of the button battery 5 and pull it out from the front end to quickly disassemble the button battery 5. The structure is simple and the disassembly and assembly are convenient.

[0036] Other structures are the same as those in Embodiment 1 and will not be described in detail here. Embodiment Three

[0037] The present application also provides a method for using a button battery connector, including the following steps: (1) First, process and form the PCB board 1, the negative electrode elastic sheet 2, and the negative electrode elastic sheet 2, so that a notch 11 matching the button battery 5 and a plurality of welding areas 12 for welding the positive electrode elastic sheet 3 and the negative electrode elastic sheet 2 are formed on the PCB board 1; (2) Weld and fix the welding feet 32 of the positive electrode elastic sheet 3 and the negative electrode elastic sheet 2 in the welding areas 12 on the bottom surface and the top surface of the PCB board 1, so that the negative electrode elastic sheet 2 and the positive electrode elastic sheet 3 form a symmetric clamping structure above and below the notch 11. The surface mounting technology can be used for surface mounting, and the surface mounting sequence can be carried out according to the requirements of the circuit board layout; (3) Horizontally place the button battery 5 with the positive electrode facing down and the negative electrode facing up. The front end of the button battery 5 abuts against the protruding section 34 and then aligns with the disassembly and assembly port 4. Then, push the button battery 5 into the notch 11 to complete the installation and fixation of the button battery 5. When it needs to be disassembled, only need to push the rear end of the button battery 5 and pull it out from the front end; of course, when the limiting section 35 is provided, the operation can be carried out according to the description in Embodiment 2 above.

[0038] Through the above connector and the method of using the connector, the production process can be greatly simplified, the processing difficulty can be reduced, the production and assembly efficiency can be improved, and the service life and stability of the button battery 5 can be ensured.

[0039] Finally, it should be noted that the above description is only the implementation mode of this application, and does not limit the patent scope of this application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of this application by the same token.

Claims

1. A button cell connector, characterized in that, Comprising: A PCB board having a notch for placing a button battery; A positive electrode elastic sheet disposed below the notch, and the positive electrode elastic sheet is fixed to the bottom surface of the PCB board; A negative electrode elastic sheet disposed above the notch, and the negative electrode elastic sheet is fixed to the top surface of the PCB board; Wherein, the negative electrode elastic sheet and the positive electrode elastic sheet are symmetrically distributed up and down to form a disassembly and assembly opening for the button battery to enter and exit, the notch is communicated with the disassembly and assembly opening, and both the positive electrode elastic sheet and the negative electrode elastic sheet include an elastic sheet body connected to the button battery, and two welding feet distributed on both side ends of the elastic sheet body, and the welding feet are fixed to the PCB board by welding.

2. The button cell connector according to claim 1, characterized in that, The thicknesses of the disassembly and assembly opening, the button battery, and the notch decrease in sequence.

3. A button cell connector according to claim 1, characterized in that, Both the PCB board and the notch are U-shaped structures.

4. A button cell connector according to claim 3, characterized in that, Two welding areas are provided on both the top surface and the bottom surface of the PCB board, and the two coplanar welding areas are symmetrically distributed on the left and right sides of the notch, and the welding feet are fixed to the welding areas.

5. A button cell connector according to claim 4, characterized in that, The welding feet include a vertical section and a horizontal section vertically connected to the vertical section, the vertical section is vertically connected to the elastic sheet body, and the horizontal section is closely attached to the welding area.

6. The button cell connector according to claim 5, characterized in that, The welding feet and the elastic sheet body are of an integral structure, and at least one through hole is provided at the connection between the two or on the welding feet.

7. A button cell connector according to claim 6, characterized in that, At least one window is provided on the elastic sheet body, and an inclined contact section is arranged in the window, one end of the contact section is close to the notch, and the other end of the contact section is connected to the elastic sheet body.

8. A button cell connector according to claim 1, characterized in that, The elastic sheet bodies of the positive electrode elastic sheet and the negative electrode elastic sheet are symmetrically distributed up and down, and the front end of the elastic sheet body of the positive electrode elastic sheet has a protruding section for assisting in installing the button battery.

9. The button cell connector according to claim 8, characterized in that, A limiting section is arranged at one end of the protruding section away from the notch, and the limiting section abuts against the side wall surface of the button battery.

10. A method for using a button cell connector, characterized in that Including the following steps: (1) Provide a notch on the PCB board that matches the button battery, and a plurality of welding areas for welding the positive electrode elastic sheet and the negative electrode elastic sheet; (2) Weld and fix the welding feet in the welding areas so that the negative electrode elastic sheet and the positive electrode elastic sheet form a symmetrical clamping structure above and below the notch; (3) Place the button battery with its positive electrode facing down and horizontally, align it with the disassembly and assembly opening. At this time, the front end of the button battery first abuts against the surface of the protruding section, and then push the button battery into the notch to complete the installation and fixation of the button battery.

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