A mechanical combination lock

By designing a complex linkage limit system and using high-strength plastic materials, the problem of insufficient security in traditional mechanical combination locks has been solved, achieving high security and efficient unlocking, reducing production costs and simplifying the production process.

CN224363756UActive Publication Date: 2026-06-16SHANGHAI DOBOND ELECTRONICS MATERIAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI DOBOND ELECTRONICS MATERIAL
Filing Date
2025-06-03
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Traditional mechanical combination locks have independent or simply linked linkage and limit mechanisms, resulting in insufficient security. They are easily cracked by brute force or technical means and cannot meet the different users' needs for password length and complexity.

⚗Method used

A complex, mutually restrictive linkage limit system was designed. Through multi-level linkage of rotating frame, connecting block, rotating plate and multiple limiting shafts, spring mechanism and unlocking mechanism, precise locking and unlocking control is formed. Combined with the all-plastic design of high-strength plastic material, the production process is simplified and safety is improved.

🎯Benefits of technology

It improves the security and unlocking efficiency of combination locks, extends their service life, reduces production costs, and facilitates modular design and assembly.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to lock technical field discloses a kind of mechanical password lock, including bottom plate and shell, the upper surface of the bottom plate is fixedly connected with upper support, the inner wall of the shell is fixedly connected with lower support, the inside rotation of the shell is connected with knob, the inside embedding installation of the knob is rotatable frame, the inside of the rotatable frame is provided with rebound mechanism one, the inside fixed connection of the shell is with limit frame, the limit frame is connected with rebound mechanism one, the outer wall sliding connection of the rotatable frame is with limit shaft, the outer wall sliding connection of the limit shaft is in the outer wall of upper support and lower support. Through the synergistic effect of limit shaft and unlocking mechanism, accurate locking and unlocking control is realized, when unlocking mechanism is in open state, rotatable frame can rotate freely, realize quick unlocking;When unlocking mechanism is in closed state, limit shaft limits the rotation of rotatable frame, ensure the stable locking of password lock, improve unlocking efficiency, also enhance the security of lock.
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