| 摘要 |
<p>LOCK MECHANISM There is disclosed a lock mechanism including a casing adapted to be mounted to a door or door frame. The lock mechanism has been designed to take up a minimum amount of space and thus is accommodatable in a relatively shallow casing structure. Said lock mechanism includes a latch bolt pivotally mounted for movement between a first position wherein a portion thereof extends from said casing and a second retracted position, associated with the latch bolt in a deadlock, also pivotally mounted and movable between a blocking position wherein said deadlock will prevent retraction of the latch bolt from its first position, and a non-blocking position wherein said latch bolt is free to move to said retracted position, with biasing means urging said deadlock toward said blocking position. To control the operation of the deadlock, a deadlock trigger is mounted to said casing and is movable between an extended position wherein a portion of said trigger extends from said casing, and a retracted position. A deadlock position lever provides the operational connection between said trigger and the deadlock, said lever being pivotally mounted with respect to said casing, and including a first end portion operatively associated with said deadlock trigger, and a second end portion operatively associated with said deadlock, such that when said trigger is in the extended position, said deadlock lever will be biased to a position wherein said second end portion will effect movement of said deadlock to said non-blocking position with respect to the latch bolt, with movement of said trigger to the retracted position, freeing said deadlock for movement to the blocking position. - 1A</p> |
