PROTECTION OF THE PERMANENT KEY HANDLE ASSEMBLY FROM UNAUTHORIZED LIFTING Russian patent published in 2021 - IPC E05B15/00 

FIELD: locking devices.

SUBSTANCE: invention relates to locking devices and can be used in rim and mortise locks for doors of residential buildings, garages, etc. The protection of the handle assembly of the permanent key of the door lock contains a lock housing (1) with a lid and a cylinder secret mechanism installed in it, a frame of crossbars (2). The crossbar frame (2) is installed in the lock housing (1) for interaction with the cylinder secret mechanism of the lock and simultaneously with the handle assembly (5) of the permanent key and consists of an upper plate that does not have a vertical stroke and a lower plate with a vertical stroke connected by three rivets (4), one of which is located in the lower part of the crossbar frame (2) so that the handle assembly (5) of the permanent key, made in the form of a rectangular plate with curved edges, during fixed installation of the crossbar frame in the extended position, overlaps a rivet with a curved edge, located in the lower part of the crossbar frame.

EFFECT: locking of the crossbar frame is ensured, the possibility of unauthorized lifting of the lower plate and at the same time the impossibility of criminal drilling of the rivet is excluded, while the protection system does not interfere with the normal functioning of the remaining lock mechanisms.

1 cl, 3 dwg