| 摘要 |
PROBLEM TO BE SOLVED: To provide a lock device having a burglarproof function higher than that of a conventional lock device. SOLUTION: The lock device 10 has a turn-of-latch restricting member 70 which enters the turning zone of a sickle member 60 hooked on an hook pin 12 to restrict the turn of the sickle member 60 when a dead bolt 17 is in a lock position. Therefore, the sickle member 60 is not unhooked from the pin 12 unless the turn-of-latch restricting member 70 is turned by a cam turning member 30. Even if the dead bolt 17 is pushed to the unlocking direction, the sickle member 60 is prevented from being moved in interlock with the dead bolt 70 so that the burglarproof function is enhanced as compared with the conventional lock. In the case of unlocking the lock normally, the dead bolt 17 and the sickle member 60 are simultaneously unlocked to enable an easy execution of normal unlocking operation. COPYRIGHT: (C)2005,JPO&NCIPI
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