| 摘要 |
Device for preventing unlawful opening of an electric lock comprising a spring latch (11), a reloading piston (12), an element (14) which is guided parallel to said spring latch (11) and said reloading piston (12) and can be blocked by a ratchet system (22-26) controlled by an electromagnet (28); and a blocking element (49) for the spring latch (11) which is mounted on the reloading piston (12) and oscillates between a position which blocks the sliding of the spring latch (11) and a position in which free sliding of the spring latch (11) is allowed; spring means are provided which retain the element (49) in blocking position when the spring latch (11) protrudes from the lock and the piston (12) is inside the lock; cam means (18) are arranged on the reloading piston (12) and allow the movement of the element (49) into the blocking position when the reloading piston (12) is inside the lock for abutting against the doorjamb. <IMAGE> |
