| 摘要 |
PROBLEM TO BE SOLVED: To provide key head covers capable of preventing the fracture of frame-shaped parts forming an insertion hole for a pocket ring. SOLUTION: A partial opening of a key blade or a key head has in the inner end section of at least one side wall of both side-walls of the front side and the back side capable of being picked up with a person's fingers and, at the same time, in the key head covers respectively having outer circumferential walls including the frame-shaped parts forming the insertion hole for the pocket ring in the outer end section side, it is so constituted that a hard interlocking piece 1 is formed in each synthetic resin-made key head cover and that at least a part 1a of the interlocking piece forms the frame-shaped part 1a. COPYRIGHT: (C)2007,JPO&INPIT
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