Anti-break mortice door lock head

Abstract

The invention belongs to the technical field of mortice door locks, and in particular relates to an anti-break mortice door lock head. The anti-break mortice door lock head comprises a lock cylinder shell, a left lock head, a right lock head and a shifting piece, wherein the left lock head and the right lock head are mirror images of each other and installed on the lock cylinder shell; a lock cylinder is installed in the right lock head; the shifting piece is installed between the left lock head and the right lock head and connected with the lock cylinder; an installation groove is formed on the upper part of the lock cylinder shell; an anti-break rod is installed in the installation groove; positioning clamping grooves are formed in the bottom of the installation groove; positioning clamping blocks are arranged at the bottom of the anti-break rod and can be inserted into the positioning clamping grooves; pin tumbler holes are formed in the lock cylinder shell; inner ejector pin tumblers are installed in the pin tumbler holes through springs; and the openings of the pin tumbler holes are positioned at the bottom of the installation groove. The anti-break mortice door lock head is simple in structure, convenient to install, and capable of effectively preventing violent breaking, being fixedly locked, and preventing the broken lock head from being rotated or unlocked by the shifting piece.

Description

technical field [0001] The invention belongs to the technical field of mortise door locks, in particular to an anti-break mortise door lock head. Background technique [0002] With the continuous development and progress of society, locks, as an important defense device in private space, play an important role in anti-theft safety. Violent unlocking means destroying the lock cylinder by violent means to open the lock. The key common part of the mortise door lock is the lock head. Due to installation requirements, the existing lock head must be provided with mounting screw holes above the shift fork gap, thus causing the strength of the part above the shift fork gap to be lower than that of other parts of the lock head. Thieves often use this weak point as a breakthrough to destroy the lock head by violent means, break through the lock protection, and enter the room to steal. Therefore, the strength problem of this part has become an important defect of the mortise door lock...

AI Technical Summary

Problems solved by technology

[0003] There are also partial solutions in the prior art. The Chinese patent with application number CN201521057716.1 adopts an anti-fragmentation piece with an integrated structure, which fits tightly in the groove of the lock cylinder shell, has high overall strength and good damage resistance, but In this scheme, the strength of the lock head is only improved by adding anti-fragmentation pieces, and the possibility of anti-opening after the lock head breaks under violent action is not considered. The key opens the door, free entry and exit

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