| 摘要 |
PROBLEM TO BE SOLVED: To provide a lock lockable/unlockable by operating by a duplicate key from an indication side but not unlocked even if operating an indicator when locked regarding the lock constituted by combining a cylinder lock with an indication lock for locking a door of a washroom or a dark room. SOLUTION: The indicator is not assembled to a tumbler but assembled to a dead bolt to obtained the cylinder lock with the indicator capable of assembling a cylinder to the tumbler and inhibiting illegal unlocking even if operating the indicator when locked. COPYRIGHT: (C)2006,JPO&NCIPI
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