Mechanical coded lock capable of changing codes conveniently

Abstract

The invention discloses a mechanical coded lock capable of changing codes conveniently. The mechanical coded lock comprises a shell, multiple groups of code mechanisms, a code changing lever, a lever shaft, a movable plate, a first elastic piece, a gear shifting pin, a second elastic piece, a push button, a third elastic piece, an unlocking plate and a fourth elastic piece; the shell is provided with a channel for allowing the unlocking plate to stretch out; the multiple groups of code mechanisms are arranged side by side in the moving direction of the unlocking plate, each code mechanism comprises a clamping spring and two groups of code assemblies which are symmetrically arranged, each code assembly comprises a code rotating button and a code matching piece, each code rotating button is sequentially provided with a first clamping groove, a second clamping groove and a first limiting plane from top to bottom, each clamping spring is provided with an inner concave part used for being clamped in the corresponding second clamping groove, and each code matching piece is provided with a code matching groove; and the movable plate comprises a code matching protruding part and a push rod part, the two sides of the code matching protruding part are used for being clamped into the code matching grooves, and the front end of the push rod part is used for pushing and pressing the gear shifting pin so that the gear shifting pin can rotate to the position capable of being pushed by the push button. The mechanical coded lock has the advantages of convenience in code change, small volume, low cost and convenience in popularization.

Description

technical field [0001] The invention relates to the technical field of mechanical combination locks, in particular to a mechanical combination lock which is convenient for changing passwords. Background technique [0002] The operation method of the mechanical coded lock is unique, similar to the dialing of an old telephone, starting from the starting point of the dial, turning the dial clockwise to a certain digit, and then returning to the starting point, a code is entered. Repeat this until the last password is entered, and then turn the dial counterclockwise from the starting point to unlock. At the same time of unlocking, the interior has been reset, so after the dial returns to the starting point to close the lock, the password must be re-entered to unlock, and there is no need to consider the internal reset problem. If you enter the wrong password, you can also reset it internally by turning the dial counterclockwise (virtual unlocking), and then re-enter the passwor...

AI Technical Summary

Problems solved by technology

[0003] Existing twisting mechanical combination locks generally have fixed passwords when they leave the factory. For mechanical combination locks that can change codes, they are large in size and high in cost, and are not easy to popularize.

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