Gear string key mechanical anti-theft lock

Abstract

The invention discloses a gear string key mechanical anti-theft lock, and relates to the field of mechanical anti-theft locks. A key hole and a handle rotating shaft are arranged on a same vertical line; a key is formed by connecting a plurality of small gears in series; each small gear is a complete gear, or an incomplete gear, or a gear with no tooth; and the key drives all racks to run for different distances through an intermediate gear. After the key is rotated for one circle, the handle drives a cam to firstly push a locking plate to be inserted into saw teeth of the racks, then the racks cannot move any more, the cam pushes an unlocking inserting plate to be inserted into rectangular openings of the racks, and the cam can continuing rotating for unlocking. When the key is incorrect,the locking plate can still clamp the racks firstly and the racks cannot move, but the unlocking inserting plates cannot be inserted into the rectangular openings, so that the cam is prevented from rotating, and the lock cannot be unlocked. If the handle is twisted strongly, the handle is idle. Locking can be completed without using a key but reversely lifting the handle. The racks, the intermediate gear and the like are simple in structure, can be stamped and processed, and are low in manufacturing cost. The lock has the characteristics of preventing technical unlocking, preventing unlockingby damage, large key amount, stability, durability and the like.

Description

technical field [0001] The invention relates to the field of mechanical anti-theft locks, in particular to a gear chain key mechanical anti-theft lock. Background technique [0002] At present, common mechanical anti-theft locks in the prior art mainly include tumbler locks, blade locks and hybrid anti-theft locks of the two. Among them, according to the structure of the tumbler lock, the shape of the key can be divided into ordinary single-sided tooth pattern (commonly known as a word lock), double-sided tooth pattern, cross-shaped tooth pattern, single-row or double-row round pits, etc.; the key corresponding to the leaf lock There are one or two serpentine curved grooves on the top; the key of the hybrid anti-theft lock has both serpentine curved grooves and pits. [0003] The main performance of the mechanical anti-theft lock is reflected in the following five aspects: 1. Anti-technical opening performance; 2. Anti-destructive performance, including anti-drilling functi...

AI Technical Summary

Problems solved by technology

[0006] Along with technology development, a number of patented products with "lock cylinder fixed cross mechanical anti-theft lock" as the core technology in the later period, including "lock cylinder fixed cross mechanical anti-theft lock matching fingerprint lock" (ZL201610990489.0), "a Cam Mechanism for Fingerprint Lock" (ZL201611045195.7), "Double Plug-in Anti-theft Door and External Locking Device" (ZL201610129609.8), "A Forced Reset Device for Rotating Ring of Anti-theft Lock" (ZL201710390280.5), " Cam Mechanism of Fingerprint Lock and Forced Reset Device of Rotating Ring" (ZL201710435512.4), "Automatic Reset and Idling Device of Stop Handle" (ZL201710393215.8), "Single Clutch Cam Mechanism of Fingerprint Lock" (ZL201810363492.9) , "Press-down assembly tool for anti-theft lock cam...

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