SECURITY LOCK Russian patent published in 2014 - IPC E05B33/00 

FIELD: construction.

SUBSTANCE: security lock, containing the following elements in a body (4), attached to the armoured door: a lever (6) of catches control (8), a cylinder (10) actuated by the key for moving the mentioned lever with the mentioned catches towards pockets made in a door stud and in the direction from them, as well as a safety device to protect the mentioned cylinder, comprising at least one element (20) moving between the disengagement position with the mentioned lever, when the catches are inserted into the stud pockets, and the engagement position in order to prevent movement of the catches from the pockets; an elastically compressed device (28) to move the mentioned moving element (20) from the mentioned disengagement position with the mentioned lever towards the mentioned engagement position; at least one element (30) to retain the mentioned moving element in the disengagement position; an elastic device (40) supporting the mentioned retaining element engaged with the mentioned moving element, in this case the mentioned elastic device is elastically compressed by the surface of the safety device, is in contact with the lock body, distinguishing by the fact that it comprises an additional elastic locking element (44) for the moving element (20).

EFFECT: structure improvement.

9 cl, 10 dwg