| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylinder lock enabling the change of a dedicated key at low cost by an easy changing operation without changing the entire part of the cylinder lock. SOLUTION: This cylinder lock comprises an inner tube 19 installed in an outer tube 15, a bar storage groove 41 formed in the outer peripheral surface of the inner tube 19, a locking bar 43 advancing into the lock groove 49 of the outer tube 15 by projecting from the bar storage groove 41 to stop the rotation of the inner tube 19, and a tumbler installed in the inner tube 15 and allowing the locking bar 43 to retreat to the bar storage groove 41 in bar advancing recessed parts 53A and 53B. The tumbler comprises a first tumbler 23A and a second tumbler 23B. The first tumbler 23A is selectively connectable to the second tumbler 23B through holes 55a, 55b, and 55c and a pin 57 at different multiple positions, and selectively disconnectable by the movement of the locking bar 43 so that the combination of the first and second tumblers can be changed to enable the change of the key. COPYRIGHT: (C)2007,JPO&INPIT
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