| 摘要 |
PROBLEM TO BE SOLVED: To easily attach/detach a female screw to/from a through-hole on a board body. SOLUTION: The female screw consists of a cylindrical part 12 with a screw surface 11 formed on the inner surface and a collar part 13 formed on the outer periphery of one end in the axial direction of the cylindrical part 12, and a swelling part 14 whose intermediate part in the axial direction swells out circularly is formed on the outer surface of the cylindrical part 12. The cylindrical part 12 can be easily forced into the through-hole 21 on the board body 20 whose diameter is smaller than the largest outer diameter of the swelling part 14, and the cylindrical part 12 in the engaged state can be easily pushed out of the through-hole 21 to be detached. Accordingly, the female screw can be easily attached to/detached from the through-hole 21 of the board body 20 without using any exclusive tool. Further, since the swelling part 14 in the intermediate position in the axial direction of the cylindrical part 12 in the attached state is pressed and tightened from above and below in the axial direction in such a way as wrapped by the inner wall of the through-hole 21 of the board body 20, the female screw can be attached to the board body 20 firmly and securely only by pushing it into the through-hole 21. COPYRIGHT: (C)2003,JPO
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