SECRET HEAD OF MECHANICAL LOCKING DEVICE Russian patent published in 2012 - IPC E05B27/00 

FIELD: construction.

SUBSTANCE: invention relates to locking devices, and more specifically to lock devices serving to lock doors of residential premises, offices, safes and depositary cabinets, and may also be used in locking devices for domestic and industrial facilities. In the proposed secret head of the mechanical locking device, which comprises a body, inside the cylindrical cavity of which there is a central rotary cylinder installed, according to the invention, in the body cavity there are additionally installed concentrically arranged the following components - a hollow cylinder fixed relative to the body and rigidly joined with it, which covers the central cylinder, and the second rotary cylinder, covering the fixed cylinder, besides, the kinematic link between the rotary cylinders is carried out via a lever fixed at the end of the central cylinder and stops at the end of the second rotary cylinder displaced from the neutral position of the lever by the angle ±β, selected on the basis of the condition β>α, where α is selected on the basis of the condition sinα/2=d\D, where d - diametre of a pin hole, and D - diametre of the central rotary cylinder. Additional cylinders are designed to fix the key code, since whenever the central rotary cylinder turns by the angle of more than α, the possibility of variation is excluded.

EFFECT: device withstands up-to-date methods of non-destructive opening of pin locks, such as picker, bumping.

5 cl, 8 dwg