ROTARY KEY TYPE LOCK WITH UNIQUE DIFFICULT MECHANISM COPING WITH ILLEGAL PICKING

摘要

PROBLEM TO BE SOLVED: To realize a structure for disabling illegal unlocking (picking) by using a key rotation type lock.;SOLUTION: This door lock comprises a lever L1 as a main key, a lever L3 with a hole for reversal for use in locking and unlocking, and a lever L2 which is interposed in an intermediate position so as to connect the levers L1 and L3 together. The lever L3 and the lever L2 are not constantly fitted and connected together. Only when the lever L2 is inserted by a specific amount by the main key, the levers L2 and L3 are fitted and connected together, so as to enable the locking and the unlocking.;COPYRIGHT: (C)2006,JPO&NCIPI