Mechanical cipher lock

Abstract

The mechanical cipher lock has one lock bolt controlling mechanism, one lock bolt executing mechanism and one digit arranging mechanism inside the lock casing, as well as one resetting assembly and one digit altering clutch assembly separately on two sides of the digit arranging mechanism. It features the resetting assembly comprising one resetting torsion spring, one ratchet wheel, one carrying hook, one reset limiting tab and one support board connecting the carrying hook and the resetting key; and the digit altering clutch assembly comprising one friction board, one friction wheel, one clutch board and one clutch card. The mechanical cipher lock has the advantages of accurate and reliable reset, free coding, compact structure and high reliability and safety.

Description

technical field [0001] The invention belongs to a lockset, in particular to a mechanical password lock used on an antitheft door or a safe. Background technique [0002] Existing lockset is made of casing, key core, dead bolt, unlocking actuator, the handle controlled by unlocking actuator, and the shortcoming of this lockset is anti-picking, anti-drilling, poor antitheft performance. The "mechanical combination lock" with the publication number "CN1587613" is composed of a lock case, a dead bolt opening control mechanism and a dead bolt telescopic actuator, a reset assembly, a code modification clutch assembly, a carry gear, a counting gear, and a reset key. , a digital arrangement mechanism composed of a carry code key and a key card, and the reset assembly is composed of a rack mounted on the reset key and inserted into the inner part of the lock case, and a pressure spring and a steel ball against the rear side of the rack, so as to To ensure the accuracy of resetting, ...

AI Technical Summary

Problems solved by technology

However, with further testing in practice, the problems of the mechanical combination lock have gradually emerged: 1. The reset component relies on pressure springs and steel balls for positioning, which is inaccurate, unreliable, and prone to failure, directly causing the lock to fail to open; 2. The reset component adopts the rack for reset, and the reset key is pushed out when the carry is carried out after reset. If the seven-key carry is used, the reset key can be pushed out of the lock shell by 25mm, which not only causes the lock to look unsightly, but also is easily damaged by external force; 3. The clutch clamp is located at One side of the lock housing, so the corresponding recoding hole is relatively eccentric, causing the counting gear shaft to tilt easily when it is out of position, making the gear inseparable, resulting in the inability to recode

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