Pick-proof lock cylinder

Abstract

The invention relates to a pick-proof lock cylinder, and belongs to the technical field of locksets. The pick-proof lock cylinder comprises a key, an inner lock cylinder and an outer lock cylinder; the inner lock cylinder is arranged in the outer lock cylinder; the key is matched with the inner lock cylinder; a spring II, a gear, a rack and a lower pin II are arranged in the inner lock cylinder; the lower pin I and the lower pin II are arranged in the inner lock cylinder by pin slots arranged at the upper inner side and the lower inner side of the inner lock cylinder; one side of the rack is connected with the inner lock cylinder by the spring II; the gear is engaged with the rack; a rack lower tooth arranged at the lower side of the rack is matched with the lower pin I; a key upper tooth arranged at the upper side of the key is matched with the lower pin II; the upper pin I, the spring I and the upper pin II are arranged in the outer lock cylinder; the upper pin I and the upper pin II are respectively arranged in the pin slots which are arranged at the upper inner side and the lower inner side of the outer lock cylinder. The pick-proof lock cylinder can prevent a lawless person with tools from directly contacting one central parts of the lock cylinder, is simple in structure, easy to manufacture and high in practicability.

Description

technical field [0001] The invention relates to a lock cylinder, in particular to a tamper-resistant lock cylinder, which belongs to the technical field of locks. Background technique [0002] A key corresponds to a lock. In the current society, locks have become an important tool for people to store personal belongings and prevent theft. When the key is inserted, a series of notches on the key will push the pair of pins up to varying degrees. If the key is wrong, most of the upper pins in the lock will still traverse the inner and outer cylinders, making the inner lock The cylinder cannot be turned; the correct key will push each pair of pins up exactly to the point where the junction of the upper and lower pins coincides with the junction of the inner and outer cylinders (this location is called the shear line) . In other words, the top pins of the key are so that all the upper pins are completely in the outer cylinder, while all the lower pins are completely in the inne...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a tamper-resistant lock cylinder that can effectively prevent criminals from using tools to directly contact one of the core components of the lock cylinder, so as to overcome the problem that existing locks are easily opened by lockpicking tools

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