Vandal-Resistant Padlock with Nested Claw Mount
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Solution Overview
Problem
Conventional combination padlocks are vulnerable to vandalism due to the instability of the rocking claw, which can be easily damaged or manipulated by external forces, compromising the safety of the locked condition.
Innovation Solution
The introduction of a claw mount with cantilevers and a ledge that encloses the rocking claw and numerical dial wheels, providing additional structural support and protection against external damage, enhancing the safety of the locked condition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the rocking claw is designed to be simple and easy to operate, then the ease of operation is improved, but the vulnerability to vandalism increases
Solution Approach 1:
The rocking claw is nested within the claw mount structure, which provides a protective enclosure. The claw mount contains the rocking claw and numerical dial wheels, creating a nested arrangement where the simpler rocking claw mechanism is protected by the more complex claw mount structure, thus achieving both ease of operation and vandalism resistance.
Solution Approach 2:
The claw mount acts as an intermediary protective structure between the external environment (vandalism threats) and the rocking claw mechanism. This intermediary structure absorbs and distributes external forces, protecting the rocking claw from direct damage while allowing it to maintain its simple, easy-to-operate design.
2Ease of manufacture
If the internal components are exposed for ease of assembly and operation, then the ease of manufacture is improved, but the protection against external force deteriorates
Solution Approach 1:
The internal components (rocking claw, numerical dial wheels) are nested within the claw mount structure. This nested arrangement allows the components to be assembled in a protected environment while maintaining ease of manufacture, as the claw mount provides a pre-formed protective enclosure that simplifies the overall assembly process.
Solution Approach 2:
The lock is segmented into distinct functional modules: the claw mount structure, the rocking claw mechanism, and the numerical dial wheels. This segmentation allows each component to be manufactured and assembled separately with optimized processes, while the modular design provides inherent protective structure against external forces.
3Strength
If the rocking claw is made more robust to resist vandalism, then the strength is improved, but the device complexity increases
Solution Approach 1:
Rather than making the rocking claw itself more complex and robust, the solution nests it within the protective claw mount structure. This approach achieves strength and vandalism resistance through the enclosing structure rather than through increased complexity of the rocking claw mechanism itself, maintaining simplicity while improving strength.
Solution Approach 2:
The claw mount merges multiple protective functions into a single integrated structure: it provides the enclosure for the rocking claw, supports the numerical dial wheels, and offers resistance to external forces. This merging achieves strength and protection without requiring multiple separate robust components, thus avoiding increased device complexity.
Data Source
AI summary
A vandal-resistant combination padlock includes a lock body, a core, a claw mount, a locking claw and an U-shaped locking shackle. The lock body has a cavity well for containing a core and shackle. The core has plural sets of numerical dial wheels and coupling tumbler cams as well as a claw mount together with a rocking claw inserted therein. The rocking claw has a latching lever, plural pawls, a blocking dog and a clipping spring. The claw mount has a pair of cantilevers with each shoulder, a ledge and plural dividing ribs extended downwardly for inserting between the adjacent numerical dial wheels. By of the claw mount, the rocking claw is enclosed therein, the numerical dial wheels are properly inserted by the dividing ribs and all the internal components are well protected to avoid damage from an external force or tool.