Fisheye terminal and development method for matching different circuit boards
A circuit board and terminal technology, applied in the direction of circuits, electrical components, fixed connections, etc., can solve the problems of poor versatility, unstable contact, large changes in insertion and extraction force, etc., to achieve convenient and unified structural design, and easy to control the shape. , the effect of good versatility
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Embodiment 1
[0038] A fisheye terminal, see Figure 1 to Figure 3 .
[0039] Such as figure 1 and figure 2 As shown, the fisheye terminal includes a lower plug-in part 1 and an upper connection part 2, the lower plug-in part 1 is used for plugging into a via hole of a circuit board, and a through hole 3 is provided in the lower plug-in part 1, and the through hole 3 includes an upper hole area 31, a middle hole area 32 and a lower hole area 33, wherein the middle hole area 32 gradually narrows from bottom to top, the upper hole area 31 gradually narrows upwards from the top of the middle hole area 32, and the lower hole area 33 narrows from the middle hole The lower end of the area 31 gradually narrows downward, and the top of the upper hole area 31 and the lower end of the lower hole area 33 of the through hole 3 are both arc ends, and the design of the arc ends can improve the pressure bearing capacity of the corresponding parts.
[0040] Such as figure 1 As shown, the length L1 of ...
Embodiment 2
[0052] A development method for matching fisheye terminals to different circuit boards, please refer to Figure 6 , the development method of the fisheye terminal matching different circuit boards includes the following steps:
[0053] Step S100: Obtain the thickness and maximum width of the fisheye terminal, the width and length of the through hole, and the size of the lead-in angle according to the diameters of the via holes on different circuit boards.
[0054] Step S200: Obtain the positions of the upper control point, the middle control point, and the lower control point and the width dimensions of the corresponding positions according to the depths of via holes on different circuit boards, so as to set the lengths of the first contact area and the second contact area.
[0055] In this embodiment, the first contact area and the second contact area are arc segments, and the arc radii of the first contact area and the second contact area are set according to the depths of v...
example
[0059] refer to Figure 1-Figure 5 .
[0060] In order to more clearly clarify the specific scheme of the development method of the fisheye terminal matching different circuit boards, the following is an example of a PCB board with an inner diameter of 1.0mm and a fisheye terminal with a thickness of 0.64mm. Here, the thickness of 0.64mm refers to the fisheye terminal. The thickness between the front and back sides of the terminal; in addition, due to processing errors, the actual inner diameter of a via hole with an inner diameter of 1.0mm usually fluctuates from 1.0-1.1mm. Therefore, the fisheye terminal needs to have a certain matching range.
[0061] In order to prevent the damage and failure of the hole wall of the via hole, the area where the fisheye terminal contacts the via hole needs to be rounded around. Usually, the larger the fillet, the smaller the damage to the hole, and the insertion force will be reduced at the same time. Comprehensive Evaluation, the fillet r...
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Abstract
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