| 摘要 |
PROBLEM TO BE SOLVED: To provide a female screw structure and a mounting hole structure for a photoelectric switch for preventing a female screw from wrenching off by dispersion of a fastening torque without enlarging a size of a product. SOLUTION: This device relates to a female screw structure wherein a metallic parallel female screw 32 is buried in a resin main body 10. The female screw 32 is formed of a nearly ring shaped metallic pipe 30. In the metallic pipe 30, the female screw 32 is formed by a wave part 31 whose inner surface and outer surface are formed in a wave shape.
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