| 摘要 |
PROBLEM TO BE SOLVED: To heighten a retention force of a press fit pin at maximum hole diameter of a through hole into which, the press fit pin is inserted, and to reduce a stress concentration and increase of insertion force of the press fit pin at minimum hole diameter. SOLUTION: A press fit pin 1 has a press-in area 6 pressed in and connected to a conductive through hole 20 of a printed board B. The cross section of the press-in area 6 is formed into M-shape having two beam-shaped areas 8, 8 extending almost in parallel with each other, and a connection area 9 deformation freely connecting respective beam-shaped areas. The cross section of the connection area 9 is formed into arc-shape of which, an upper surface 9a corresponding to the valley side of the M-shape is concave, and a lower surface at opposite side is convex surface. A part of the upper surface 9a is located at the lower surface 9b side of a line L drawn between inside continued parts 12 at left and right sides where the lower surface 9b of the connection area 9 is continuously connected to inside surfaces 8b of two beam-shaped areas 8.
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