Automatic lock device for locking door in rabbet of opening, has magnetic elements attracted with each other for controlling retaining unit to release bolt when door closes opening, so that elastic unit drives bolt inside strike case

摘要

The device has an elastic unit (16) i.e. spring, assembled inside a lock case (10) and against a dead bolt (14). A controllable retaining unit maintains the bolt in a retracted position. A magnetic element (34) is located inside the lock case and integrated to the retaining unit. Another magnetic element (46) is located inside a strike case (12) mounted in a rabbet. The magnetic elements are attracted with each other for controlling the retaining unit to release the bolt when the door closes an opening, so that the elastic unit expands and drives the bolt inside the strike case.