Weldless fisheye-shaped pin

Abstract

The utility model discloses a kind of welding-free fish-eye PIN, including PIN body and the plug-in connector of being located above PIN body and being fixed with PCB board cooperation;The plug-in connector is fish-eye-shaped with narrow two ends and wide middle, and elliptical deformation adjusting hole is arranged in the middle of plug-in connector, and the upper and lower surfaces of plug-in connector are plane structure, and the side of plug-in connector is crimping cooperation part matched with PCB board, and the crimping cooperation part includes side end face and side inclined surface extending from side end face to upper and lower surfaces respectively.The utility model is simple in structure, assembly method, and good in assembly reliability, and can solve the problem of high cost of existing welding process and unstable quality, and can be widely applied in PIN assembly field.

Description

Technical Field

[0001] This utility model relates to the field of automotive electrical components, specifically to a solderless fisheye-shaped PIN pin. Background Technology

[0002] Pins are primarily used in power modules to connect to PCBs (Printed Circuit Boards) and DBCs (Directly Bonded Copper Boards) for transmitting drive signals or conducting electricity. Currently, commercially available pins generally consist of three parts: a connector, a buffer, and a soldering section. After the pin is inserted into the PCB's connection hole, it is soldered to the PCB to secure it. Soldering not only adds a soldering step, increasing costs, but also easily leads to cold solder joints and solder slag. Cold solder joints affect the reliability of the connection, and solder slag can cause short circuits, thus affecting the device's lifespan. Summary of the Invention

[0003] The purpose of this invention is to provide a solderless fisheye-shaped PIN pin to improve the convenience and stability of PIN pin assembly and reduce production costs.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a solderless fisheye-shaped PIN pin, including a PIN pin body and a connector located above the PIN pin body and fixed to the PCB board; the connector is fisheye-shaped with narrow ends and wide middle, and an elliptical deformation adjustment hole is provided in the middle of the connector; the upper and lower surfaces of the connector are planar structures, and the side of the connector is a crimping mating part that mates with the PCB board; the crimping mating part includes a side end face and side inclined surfaces extending from the side end face to the upper and lower surfaces respectively.

[0005] While ensuring conductivity, a certain amount of elastic deformation is also ensured. The PIN needle body and the connector are integrally formed and are made of CuSn6 R560 material.

[0006] To ensure reliable fit, the upper part of the connector is the insertion end, and the lower part is the mating part that mates with the PCB board. The mating part is interference-fitted with the insertion hole of the PCB board. The length of the mating part is 0.9-1.1 times the length of the insertion hole of the PCB board.

[0007] To increase the amount of deformation, the length of the deformation adjustment hole is greater than the length of the mating part and extends upward to the insertion end.

[0008] The beneficial effects of this utility model are as follows: The fisheye-shaped structure of the connector facilitates insertion into the sockets on the PCB board. Furthermore, the deformation of the connector maintains a certain elastic deformation pressure with the sockets on the PCB board, thereby improving the reliability of the insertion and fixing. Moreover, the design is simple and low-cost.

[0009] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0011] Figure 2 This is the front view of the present invention.

[0012] Figure 3 for Figure 2 The sectional view in the image. Detailed Implementation

[0013] Examples, such as Figures 1 to 3 As shown, a solderless fisheye-shaped PIN pin includes a PIN pin body 1 and a connector 2 located above the PIN pin body 1 and fixed to a PCB board. The connector 2 is generally fisheye-shaped, narrow at both ends and wide in the middle, and has an elliptical deformation adjustment hole 3 in the middle. The upper and lower surfaces of the connector 2 are planar, and the side of the connector 2 is a crimping mating part 21 that mates with the PCB board. The crimping mating part 21 includes a side end face 211 and side inclined surfaces 212 extending from the side end face 211 to the upper and lower surfaces respectively. When the crimping mating part 21 is pressed, it deforms, completing the assembly with a plug hole whose diameter is smaller than the width of the connector 2. After assembly, the crimping mating part 21 always maintains a certain elastic restoring force acting on the side wall of the plug hole, thereby ensuring the reliability of the fixing between the crimping mating part 21 and the plug hole. The crimping mating part 21 is generally trapezoidal in structure, as shown below. Figure 3 The structure, combined with the deformation adjustment hole 3, has better deformation elasticity, thereby ensuring the reliability of the fit.

[0014] Furthermore, the PIN needle body 1 and the connector 2 are integrally formed, and the PIN needle body 1 and the connector 2 are made of CuSn6 R560 material to ensure conductivity and elastic deformation force.

[0015] To facilitate assembly and further improve assembly reliability, the upper part of the connector 2 is an insertion end 22, and the lower part is a mating part 23 that mates with the PCB board. The mating part 23 is interference-fitted with the insertion hole of the PCB board. The length of the mating part 23 is 0.9-1.1 times the length of the insertion hole on the PCB board, increasing the mating contact surface with the insertion hole to improve contact reliability. The deformation adjustment hole 3 is longer than the length of the mating part 23 and extends upward to the insertion end 22, thereby increasing the deformation range and the springback force of the deformation.

[0016] During assembly, the external clamp applies a force of 100~500N to the connector 2. Under the action of the 100~500N force, the connector 2 shrinks and deforms, and then is pushed into the insertion hole. After the assembly is in place, the external clamp is released, the applied force ends, and the connector 2 is firmly connected to the PCBA under the action of the spring force.

[0017] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A solderless fisheye-shaped PIN pin, comprising a PIN pin body (1) and a connector (2) located above the PIN pin body (1) and fixed to a PCB board; characterized in that: The connector (2) is a fisheye shape that is narrow at both ends and wide in the middle. An elliptical deformation adjustment hole (3) is provided in the middle of the connector (2). The upper and lower surfaces of the connector (2) are planar structures. The side of the connector (2) is a crimping mating part (21) that mates with the PCB board. The crimping mating part (21) includes a side end face (211) and side inclined surfaces (212) that extend from the side end face (211) to the upper and lower surfaces respectively. The upper part of the connector (2) is the insertion end (22), and the lower part is the mating part (23) that mates with the PCB board. The mating part (23) is interference-fitted with the insertion hole of the PCB board. The length of the mating part (23) is 0.9-1.1 times the length of the insertion hole of the PCB board. The deformation adjustment hole (3) is longer than the mating part (23) and extends upward to the insertion end (22).

2. The solderless fisheye-shaped PIN pin according to claim 1, characterized in that: The PIN body (1) and the connector (2) are integrally formed and are made of CuSn6 R560 material.

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