| 摘要 |
<p>In a recodable lever tumbler lock such as used with a safety deposit box lock, a coding device (17) and a recoding pin of particular configuration are caused to interact with remaining components of the lock mechanism of more conventional instruction. When the lock is activated to its normal retracted position, one end of the coding device functions as a stop abutment and engages a waist portion on the recoding pin whereby another part of the coding device engages a hook means provided on the periphery of a dog (7) included in the lock, and the dog can be rotated only through about 150 DEG with the ordinary key. When the lock is to be recoded so as to work with a different key, the lock is first activated to its locking mode with the door open, and the recoding pin is moved to a second end position by manual manipulation. In this second end position, the end (17e) of the coding device is prevented from entering a waist on the pin and therewith enables the dog to be rotated through 180 DEG and the key (5) to be replaced with a new key (6). At the end of this locking movement, the coding device is released from its engagement with the fences and recoding of the lock to the new key takes place and the coding device locks the fences (15) in their newly adopted positions. The recoding pin (21) is returned automatically to its normal position. <IMAGE></p> |
