| 摘要 |
PROBLEM TO BE SOLVED: To quietly release a bicycle lock of a circle-lock type by absorbing a shock and restraining a percussive noise upon opening its bolt bar. SOLUTION: The bicycle lock includes the arc-shaped bolt bar and a return spring which are disposed inside an arc-shaped lock case. A shock absorbing block 4 for regulating the end of a lock-releasing stroke of the bolt bar 2 is disposed inside the lock case 1. The bolt bar is provided with an abutting part 5 abutting the shock absorbing block 4 so that the abutting part may be brought into contact with the shock absorbing block at the end of the lock-releasing stroke of the bolt bar. COPYRIGHT: (C)2005,JPO&NCIPI
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