Spring lock head for anti-theft door lock

Abstract

The invention provides a spring lock head for an anti-theft door lock. The spring lock head comprises a lock head body and a lock cylinder; the lock cylinder is rotatably spliced in a lock core hole in the lock head body; a plurality of spring holes are arranged in the lock cylinder; springs are arranged in the spring holes; a baffling body for limiting the relative rotation of the lock head body and the lock cylinder is arranged between the lock head body and the lock cylinder; the springs are peripherally fixed relatively to the spring holes; grooves are arranged on the outer circumference faces of the springs; the positions of the grooves on the springs correspond to a range of the springs; a sliding groove communicated with the spring holes is axially arranged in the lock cylinder; a sliding bolt is arranged in the sliding groove; a plurality of inserting heads extending into the intervals of the spring holes are arranged on the sliding bolt; the inserting heads can be spliced in the spring grooves; an inserting strip is arranged between the sliding blot and the baffling body; and the sliding strip can radially move inwards along the lock cylinder, so that the sliding bolt axially moves along the lock cylinder. The spring lock head for the anti-theft door lock provided by the invention has high anti-twisting strength, and can effectively improve the anti-theft property of the anti-theft door lock.

Description

technical field [0001] The invention relates to a tumbler lock head applied to an anti-theft door lock. Background technique [0002] The structure of the existing anti-theft door lock tumbler lock head mainly includes a lock head body and a lock cylinder. The lock cylinder is rotatably arranged in the lock cylinder hole in the lock head body. A pin and spring are provided with steps between the pins. In order to increase the anti-twisting strength of the lock cylinder, a V-shaped groove is arranged on the inner wall of the lock cylinder hole along its axial direction, and an insertion piece and a spring are arranged in the lock cylinder, and the spring acts on the insertion piece to make the insertion piece face the direction of the lock cylinder. The radially outer side protrudes, and the insert piece protruding to the outer side of the lock core is inserted into the V-shaped groove, thereby effectively increasing the torsional strength between the lock core and the lock ...

AI Technical Summary

Problems solved by technology

The torsional strength of this kind of lock head is low. When using tools to forcibly pull the lock cylinder, it is easy to bend and deform the inside and outside of the insert piece, so that the insert piece loses its clamping effect on the lock cylinder, which will affect the anti-theft door. The anti-theft effect of the lock

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