Spiral convex-concave-wall positioning anti-drilling antitheft lock

Abstract

The invention discloses a spiral convex-concave-wall positioning anti-drilling antitheft lock which is characterized in that at least one convex wall and concave wall spiral tooth or tumbler tooth is formed in a key to be matched with at least one convex wall and concave wall spiral groove formed in a key hole, the spirals are 180 degrees, tumblers are arranged in the tumbler holes of a lock body and the lock cylinder, the spiral convex wall and the spiral concave wall bends to prevent other keys from being inserted into the keyhole, stealing and assembling tools cannot be inserted into the key hole, a gap for shifting the tumblers avoided, the key hole is provided with at least one spiral trapezoid anti-drilling groove, the anti-drilling groove is provided with a small groove opening at a surface end and gradually increases to form a large groove opening after the groove extends to an inner end, a trapezoid anti-drilling column quenched by number 45 steel is disposed in the anti-drilling groove and provided with a large head and a small head respectively matched with the large groove opening and the small groove opening, the trapezoid anti-drilling column cannot be pulled out by drilling, a positioning oblique lifting contact surface matched with the inclination of the positioning oblique contact face of a positioning pin disposed at the top end of the key is disposed at the top end of a key, so that no advancing space is provided for other keys and the stealing tools is limited, and unlocking is prevented.

Description

technical field [0001] The invention relates to an anti-theft lock, more specifically, it relates to an anti-drilling anti-theft lock with spiral convex wall and concave wall positioning. Background technique [0002] Patent No.: 200420079009.2 or 200620074427.1 and the existing anti-theft locks on the market, the key and the lock cylinder key are matched in a spiral shape, and there are marbles or lock pins or marbles of various shapes spirally arranged in the keyhole groove. The width between the two walls of the bottom of the spiral groove is equal to the width between the two walls of the notch, which becomes the shortcoming that the walls of the two sides of the spiral groove are parallel. Operation or convenient combination of tools for sleeve unlocking. The lock cylinder has at least two separated spiral slots, so that at least two separated spiral inserts on the key can be respectively exchanged and inserted into the slots to adjust the tooth pitch of the lifting in...

AI Technical Summary

Problems solved by technology

At the end of the lock cylinder, there is a longitudinal setting for the positioning of the lock pin, which makes the lock cylinder too thick and long, which is not conducive to installation on thin door leaves

The lock cylinder is equipped with a helical anti-drilling frame, and it is set on the periphery of the lock cylinder, but the part in the keyhole body of the lock cylinder is not protected

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