Gear-driven mechanical code lock

Abstract

The invention relates to a gear-driven mechanical code lock and relates to the field of turnplate number check type mechanical code locks. Five rotary knob discs are rotated directly to accomplish a number check operation; a cam mechanism is driven by a handle to rotate to unlock and lock; during number check, a coupling shaft movably connected to each rotary knob shaft penetrating a lock body drives an overload protection device and a code changing device to rotate first and adjacent parallel shafts to rotate, returns to the lock body and then drives a center gear and a follow-up gear to rotate synchronously, so that five turnplates provided with openings rotate to correct positions. During unlocking, a cam pushes a locking plate first to be inserted into a tooth space of the center gear, each rotary knob disc no longer rotates, then the cam pushes an unlocking insertion plate to be inserted into the opening of each turnplate, and the cam rotates continuously to unlock, and technicalunlocking cannot be achieved. When the handle or the rotary knob discs are twisted powerfully, the handle and the rotary knob discs can idle. A code changing operation and a code garbling operation are easy and feasible, so that the gear-driven mechanical code lock is particularly suitable for being used in important occasions with relatively low frequency of usage.

Description

technical field [0001] The invention relates to the field of turntable-marked mechanical coded locks, in particular to a gear-driven mechanical coded lock. Background technique [0002] The turntable matching mechanical code lock has a wide range of applications. As a mechanical blocking mechanism, it is often used on file cabinets, vaults, safes, safes, and security doors. However, there have been a series of problems for a long time. First, the registration process takes too long 1. The operation is inconvenient; second, the password cannot be changed, which is very inconvenient for hiding and storing the password or remembering the password; third, the anti-theft opening performance cannot be opened technically, because the knob plate is in direct contact with the blocking mechanism inside the lock through the knob shaft. It is easy to crack by hearing, feeling and experience; fourth, the anti-destructive performance is not good enough, especially the combination lock ins...

AI Technical Summary

Problems solved by technology

[0005] However, there are certain problems with the "hole-sealed mechanical combination lock", mainly because the registration operation process is relatively complicated: when registering, you need to press each knob first, and insert the convex edge of the knob shaft into the docking groove of the turntable shaft In order to complete the check number operation; after unlocking and locking, in order to prevent the password from being stolen, it is necessary to confuse the numbers corresponding to the sights on each knob plate, that is, the garbled code operation process also needs to be completed by pressing the knob plate first and inserting the convex edge into the docking groove. , causing some trouble to users

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