| 摘要 |
An arrangement for controlling the protruding dimension of a latch bolt (1) in a door lock which includes a lock case (11) which is provided with force transmission means for retracting the latch bolt (1) against the force of a spring (10) and with an auxiliary bolt (2) for controlling the operation of the latch bolt and in which the latch bolt (1) has at least two different protruding positions with different protruding dimensions. The arrangement includes a control and retraction unit (4,6) which is arranged in cooperation with the latch bolt (1) and the auxiliary bolt (2) so that it allows movement of the latch bolt (1) into its outermost protruding position only in case both the latch bolt (1) and the auxiliary bolt (2) are first moved into their retracted position in the lock case (11). |
