| 摘要 |
PROBLEM TO BE SOLVED: To provide a door lock used for what is called a one-door-two-lock system, in which, when locking a door from indoor side, when locking one cylinder lock, the other lock can be automatically locked, but when unlocking the door from outdoors, both cylinder locks have to be unlocked separately. SOLUTION: A thumb turn shaft 6 is rotatably installed in each thumb turn provided indoors, and the inner end of each thumb turn shaft 6 is coupled with a lock system 3 in a lock box through a movement system and couplers 9, so that the couplers 9 may move as much as the operation angle. Meanwhile the upper and lower thumb turn shafts 6 are coupled together so that they may rotate concurrently in such a mode that the angle of a coupler 9 relative to the corresponding thumb turn shaft 6 is always equal in the two couplers 9. COPYRIGHT: (C)2006,JPO&NCIPI
|
