| 摘要 |
PROBLEM TO BE SOLVED: To prevent slipping-out when the projecting part of the terminal pin recess/ projection part abuts to a wall of a hole, and to eliminate the head part from projecting on a base board by continuously arranging the recess/projection part entering in the radial direction into the joining part with a hole of a columnar terminal pin, in a spiral shape in the shaft direction. SOLUTION: The recess/projection part entering in the radial direction into the head part 2 of a columnar terminal pin 1 is continuously arranged in a spiral shape in the shaft direction. When looking at the terminal pin 1 from the side surface, in the head part 2 having a petal-like plane shape, the projecting end of a petal is a spiral projecting strip like a screw thread, and a cross section by cutting the head part 2 vertically to a shaft is a petal shape but is exccentric at all positions. When this terminal pin 1 is inserted into a round hole 4 having a diameter of the size surrounding the petal shape of the head part 2, the lowest end of the head part 2 enters the round hole 4, and is put in a fitting state by vertical eccentricity of the head part 2 when it is inserted further, and when the head part 2 becomes flat with the surface of a base board 3, insertion of the terminal pin 1 is stopped. Therefore, the terminal pin 1 does not fall off, and does not become a hindrance when mounting an electronic part on the base board 3. |
