Door lock arrangement ensuring locking when room is vacant - has one electric switch component indicating open-closed position of lock and another indicating position of door w.r.t. frame

摘要

The two switch components (4; 5, 6) of the lock arrangement are connected to a monitoring circuit (7) incorporating a time circuit. This latter circuit, during a predetermined time period after an opening/closing operation for the door (2), monitors whether the first switch component indicates that locking of the door lock has been effected, or whether manual reset has been carried out by a manually activatable electric switch (9). Otherwise, the circuit initiates the giving of the alarm by optical and/or acoustic signal units (10, 11). The second electric switch component (5, 6) comprises a permanent magnet (5) working with a magnetically activatable electric switch component (6), the one part being fitted in the door frame (1) and the other connected to an edge part of the door (2).