Anti-theft hydraulic door lock

Abstract

An anti-theft hydraulic door lock comprises a lock body and a cylindrical lock cylinder horizontally embedded into the lock body, wherein a hydraulic oil cavity and locking plunger piston are arranged in the lock body, the locking plunger piston is located in a locking plunger piston sliding channel coaxial with the lock cylinder, the end, close to the lock cylinder, of the locking plunger piston is opposite to a key penetrating into the lock cylinder, and the other end of the locking plunger piston is located in the hydraulic oil cavity and is provided with a return spring. The lower side of a key hole of the lock cylinder is provided with multiple vertical ball tracks axially arranged along the lock cylinder, each ball track penetrates through the interface between the lock body and the lock cylinder and enables the key hole and the hydraulic oil cavity to be communicated, a plunger piston ball is installed at the lower portion inside each ball track, and a lock cylinder ball is installed at the upper portion of each ball track. The balls of the anti-theft hydraulic door lock adopt a hydraulic driving mode. When no key exists in the lock, all the balls are hidden in the lower portions of the ball tracks, an unlocking tool is very difficultly in contact with any ball from the key hole, the plunger piston balls under hydraulic driving do not bounce rapidly, accordingly the soft unlocking difficulty is increased, and the safety performance of the door lock is improved.

Description

technical field [0001] The invention relates to a hydraulic household door lock capable of effectively preventing malicious damage by criminals, and belongs to the technical field of door locks. Background technique [0002] At present, household door locks are generally mechanical pin locks. Each pin track is divided into two sections, one section is arranged in the lock cylinder, and the other section is arranged in the lock body. A pair of pins are arranged in each pin track. In the locked state (that is, no key is inserted or a non-body key is inserted), all or part of the pins in the pin track bear shear force to limit the rotation of the lock cylinder relative to the lock body; when the key is inserted into the lock cylinder, the teeth on the key Squeeze the pins in the pin track to make the pins move accordingly. After the key is inserted in place, the butt joint of each pair of pins is just flush with the cylindrical surface of the lock cylinder. At this time, there ...

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Problems solved by technology

[0006] 2. In order to reduce the sliding friction between the key and the pins, the pins of the lock are generally made of copper with self-lubricating function, and in order to facilitate the insertion of the key, the diameter of the pins is generally small and the shear resistance is limited, resulting in Door locks are easily broken

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