| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylinder lock that is easy to manufacture. SOLUTION: This cylinder lock has: a rotor 2 which is freely rotatable within a case 1; a pair of tumblers 9 comprising a pair of inner tumblers 4 freely relatively movably passed through a pair of outer tumblers 3 such that when a true key is inserted into a key insertion groove in the rotor 2, a parting face between the pairs of tumblers 3, 4 coincides with the rotation boundary face between the rotor 2 and the case 1; and a coil spring device 10 for energizing the pair of tumblers 9 toward the key insertion groove to inhibit rotation of the rotor 2 by moving the parting face from the rotation boundary face 8 when the true key is not inserted. The coil spring device 10 comprises a large diameter coil part 12 corresponding to the pair of outer tumblers 3 and a small diameter coil part 13 corresponding to the pair of inner tumblers 4, the coil parts 12, 13 being connected to each other at a common end turn part 11.
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