| 摘要 |
PROBLEM TO BE SOLVED: To provide a screw to be implanted in a base plate such as a metal material with resistance welding in such a manner as to be easily perpendicular to the base plate during implantation and superior in bending or returning mechanical strength. SOLUTION: The implanted screw 100 is implanted in the base plate 50 such as the metal material with welding. A skirt portion 30 is protruded in inclination from the lower end of a shaft core 10 of the screw to the downward direction. A circularly rounded abutting face 31 is formed at the front end of the skirt portion 30, while a retaining face 40 is provided on the lower end face of the shaft core encircled by the skirt portion 30. COPYRIGHT: (C)2007,JPO&INPIT
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