Anti-break-in device for a safety lock and safety lock comprising such a device

摘要

The invention relates to safety locks. To oppose a break-in attempt, the anti-break-in device comprises, integrated into the outer cylinder 7 of the lock 4, at least one thermal detector consisting of a pin 20, held in equilibrium by a spring 22, and a metal wire 23, one end of which is embedded in a plug 24 made of softenable material. Under the action of heat, the pin 20, when ejected, blocks the bolt shank 10. Also according to the invention, the guide 36 of the key is mounted on a ball 37 and there are means 40, 41 for blocking the rotor shank 31 of the mechanism and means for blocking the two webs 14, 15. The invention is used in safety locks. IMAGE