Dual Cam Lock Apparatus Anti-Prying Mechanism
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Solution Overview
Problem
Existing locking mechanisms for housings, such as cabinets, lack effective mechanisms to prevent unauthorized access and withstand forced movement attempts, as they often rely on simple key-based systems that can be vulnerable to prying or tampering.
Innovation Solution
A dual cam lock apparatus comprising a rotatable lock with a first cam and a second cam, where the first cam has a protrusion and arm to retain the locking blade in position, and the second cam has a slot and arm to rotate the locking blade between locking and release positions, along with a support bracket to prevent forced movement, providing enhanced security and resistance to prying attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple key-based locking mechanism is used, then the ease of operation is improved, but the reliability against forced movement attempts deteriorates
Solution Approach 1:
The locking mechanism is segmented into two independent cams: a first cam for normal locking operations and a second cam for anti-prying protection. This segmentation allows each cam to specialize in one function, maintaining ease of operation for legitimate users while providing enhanced reliability against forced entry attempts.
Solution Approach 2:
The first arm acts as an intermediary element between the first cam and the locking blade, providing a jamming function that prevents forced movement. This intermediary component transfers the protective function from the cam mechanism to the locking blade without complicating the user operation.
2Reliability
If a dual cam mechanism with jamming functionality is added, then the reliability against forced movement is improved, but the device complexity increases
Solution Approach 1:
The first arm serves dual purposes: it acts as both a locking element (engaging with the locking blade) and a jamming bracket (preventing forced movement). This merging of functions reduces the number of separate components needed, thereby limiting the increase in device complexity while maintaining enhanced reliability.
Solution Approach 2:
The first cam body is designed to perform multiple functions: it provides the primary locking action through its cam surface and simultaneously activates the jamming protection through the first arm. This multi-functionality allows a single component to address both normal operation and security protection, reducing overall system complexity.
3Strength
If the first arm is configured to jam against the locking blade during forced movement, then the resistance to prying attempts is improved, but the force required to operate the lock increases
Solution Approach 1:
The jamming function is designed to activate only under forced movement conditions, creating preliminary resistance before actual prying occurs. The first arm is positioned and configured to engage with the locking blade in advance, so that when forcing is attempted, the resistance is already in place, preventing the need for excessive force to overcome passive resistance.
Solution Approach 2:
The first arm is designed with dynamic engagement characteristics, where the jamming force is applied selectively during forced movement rather than continuously. This dynamic behavior allows normal operation to proceed with minimal force while providing high strength resistance only when needed, optimizing the force-strength trade-off.
Data Source
AI summary
A dual cam lock apparatus comprising a locking blade, a rotatable lock, a first cam and a second cam. The first cam comprises a first cam body and a first arm extending from the first cam body. The first cam is rotatable by the rotatable lock to move the first arm in and out of contact with the locking blade. The second cam comprises a second cam body with at least one slot therethrough which receives at least one protrusion of the first cam, and a second arm extending from the second cam body and coupled with the locking blade. The slot has an angular span across which the protrusion rotates before further rotation of the protrusion causes rotation of the second cam, whereby rotation of the second cam rotates the second arm to move the locking blade between the locking and release position.