| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylinder lock which enables the use of a plurality of types of normal keys, and which exerts the great effect of preventing locking/unlocking from being performed by means of a fraudulent key, by making a plurality of division boundaries correspond to a plurality of rotational boundaries in a one-to-one manner. SOLUTION: This cylinder lock 10 comprises: an outer cylinder 21; an inner cylinder 22 and an intermediate cylinder 23, which are rotatably arranged in the outer cylinder 21; and tumblers 41-45. The rotational boundaries 31 and 32 are composed of the first and second rotational boundaries 31 and 32. The respective division boundaries of the respective tumblers 41-45 are composed of the first division boundaries A1-A5 and the second division boundaries B1-B5. When all the tumblers 41-45 are in the first state wherein the first division boundaries A1-A5 are aligned with the first rotational boundary 31, and the second state wherein the second division boundaries B1-B5 are aligned with the second rotational boundary 32, the inner cylinder 22 is rotated for the performance of locking/unlocking. COPYRIGHT: (C)2007,JPO&INPIT
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