Lock bulb with spiral keyhole

Abstract

A lock bulb with a spiral keyhole comprises a lock body, a lock cylinder, spring mechanisms and an anti-drilling cover, wherein the lock cylinder is movably fit in the lock body, is provided with the spiral keyhole and is composed of a lock cylinder body and a spiral tube; the spiral tube is provided with the spiral keyhole; and the lock body, the lock cylinder body and the spiral tube are provided with the spring mechanisms. When in use, the lock bulb is fixed in the lockset, the spiral key is screwed into the spiral keyhole of the lock bulb to ensure the outer spring to leave the position which locks the lock cylinder to turn, the spiral key is turned and the lock cylinder can turn along with the spiral key to open the anti-theft lock. As the keyhole is screwed in a spiral way, the lock is hard to open by the thieves with master keys. The spring mechanisms can be arranged along the spiral keyhole, thus increasing the spring setting passwords and improving the anti-theft performance of the anti-theft locks.

Description

Technical field [0001] The invention relates to a lock cylinder, in particular to a screw keyhole lock cylinder. Background technique [0002] The keyholes of existing lock cylinders are all straight, and thieves are easier to open with a master key. A screw keyhole lock cylinder with a master key that is difficult to insert into the keyhole has become a need for people to improve the anti-theft performance of anti-theft locks. Contents of the invention [0003] The object of the present invention is to overcome the deficiencies of the prior art and provide a screw keyhole lock cylinder for improving the anti-theft performance of the anti-theft lock. [0004] The technical solution adopted by the present invention is: including a lock body, a lock cylinder, a pin mechanism and an anti-drilling cover, the lock cylinder is dynamically fitted in the lock body, the lock cylinder is provided with a screw key hole, and the lock cylinder is composed of a lock cylinder body and a ...

AI Technical Summary

Problems solved by technology

[0002] The key holes of existing lock cylinders are all straight, and thieves are easier to open with a master key. A screw keyhole lock cylinder, which is difficult for a master key to insert into the key hole, has become a need for people to improve the anti-theft performance of anti-theft locks.

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