anti-theft lock

Abstract

The invention discloses an anti-theft lock. The anti-theft lock comprises a shell; a core sleeve and an inner core form a lock core; an open hole is formed at the middle of the shell; the inner core is inserted into the core sleeve; the core sleeve is inserted into the open hole; an internal pressing limiting block is inserted into an insertion hole; a bit is inserted into a trench hole; unlocking blades are located at the outer side of the inner core; a clamp spring is located at one side of the shell and sleeves one end of the core sleeve; sliders and the internal pressing limiting block are respectively provided with an inner pressing element; the sliders are inserted into slide grooves; the slide grooves and the insertion hole are located on the shell; the inner core is provided with a plurality of blade pits for accommodating the unlocking blades; two sets of unlocking blades are arranged in each blade pit; the two sets of unlocking blades are of a complete circle structure which is formed through combining four semicircle-shaped structures; one inner circular arc of each unlocking blade is provided with a limiting protrusion; the limiting protrusions are matched with tooth slots of one key; and the edges of each set of unlocking blades are provided with a plurality of unlocking grooves. The anti-theft lock of the invention can be prevented from being unlocked freely, and anti-theft performance can be improved, and error unlocking rate can be decreased.

Description

technical field [0001] The invention relates to a lock head, in particular to an anti-theft lock head. Background technique [0002] Chinese invention patent 212006200640193 discloses an anti-theft lock whose blades can rotate freely 360 degrees. This anti-theft lock is designed with upper and lower unlocking keys. sense of direction, and these unlocking keys are in contact with the unlocking blades at any time, or the unlocking keys are in contact with the unlocking blades by twisting the inner core. If a master key or similar tool is inserted into the keyhole, some of the leaves are in the unlocked position . Since the blades of the anti-theft lock can rotate freely in 360 degrees, for those who have rich experience in unlocking, they can continue to rotate the master key or similar tools to drive the rotation of the blades, and other blades that are not yet in the unlocked state Experience turning to the state of unlocking, so that the anti-theft lock is technically ope...

AI Technical Summary

Problems solved by technology

In addition, in the prior art, some anti-theft locks are designed with two unlocking keys, but the amount of change in the designed key teeth is not enough, and it is easy to cause mutual opening.

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