Multifunctional Lock Key Change Mechanism
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Solution Overview
Problem
Existing multifunctional locks allow key changes but pose a security hazard as the original key can be removed at any position of the lock core rotation, compromising security.
Innovation Solution
A multifunctional lock design featuring a lock core with a key bar, sliding blocks, tooth pieces, and elastic elements that allow the key to be changed safely by engaging and disengaging the sliding blocks with tooth pieces during specific lock core positions, ensuring secure key replacement without security hazards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the key can be removed at any position of lock core rotation, then key replacement convenience is improved, but security is compromised
Solution Approach 1:
The lock core is designed with dynamic characteristics where the key removal capability changes based on rotation position. The lock core can rotate freely during normal operation but becomes locked in specific positions (0°-10° and 350°-360°) where key removal is permitted. This dynamic state change allows the system to provide both convenience and security by enabling key replacement only at authorized positions while maintaining security during other rotation states.
2Adaptability or versatility
If multiple key changes are allowed, then adaptability is improved, but security hazards increase
Solution Approach 1:
The system performs preliminary verification of the lock core's rotation position before allowing key removal. The lock core must be rotated to specific authorized positions (0°-10° or 350°-360°) where the internal mechanism permits key extraction. This preliminary position verification ensures that key changes occur only under secure conditions, enabling multiple key changes while maintaining security through pre-condition validation.
3Ease of operation
If the lock core rotates freely, then operational flexibility is improved, but uncontrolled key removal becomes possible
Solution Approach 1:
The lock core incorporates localized functional zones at specific rotation positions. The regions from 0° to 10° and from 350° to 360° are designed with special structural characteristics that enable key removal, while other rotation positions maintain normal locking functionality without key removal capability. This local quality differentiation allows the lock to provide operational flexibility during most rotations while preventing uncontrolled key removal through position-specific structural design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures secure key changes by engaging and disengaging sliding blocks with tooth pieces during specific lock core positions, eliminating potential security hazards and allowing multiple key combinations, thereby enhancing lock security and functionality.
Implementation Method 1
a first elastic element is provided between each of said sliding blocks and its corresponding lock core body
Implementation Method 2
a second elastic element is provided between said lock bar and said support for sliding blocks
Data Source
AI summary
A multifunctional lock comprises a lock shell (1), a lock bar (3), movable tooth pieces (4), a support (5) for sliding blocks, sliding blocks (6) and a guide slot unit (8) for the insertion of a key. Wherein, an elastic element is provided between the lock bar and the support, the sliding blocks at least partially extend into the keyway of the unit. When the lock is unlocked, a projection of the unit has two operating positions, in one of which the projection is received into the cut of the shell and the upper teeth of the tooth pieces disengage from the bottom teeth of the sliding blocks, in another it is out of the cut and the upper teeth engage with the bottom teeth. The key of the lock can be changed many times.