Tool-Operated Latch With Rotating Cam Prevents Tampering
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Solution Overview
Problem
Existing latch mechanisms are susceptible to tampering and human error, as they can be inadvertently unlocked, compromising security and safety in applications like aircraft structures.
Innovation Solution
A latch mechanism featuring a rotatable locking cam with an extending finger and a pin system that requires a tool to transition between locked and unlocked positions, integrating a spring-loaded cam and indicator features to ensure secure engagement and prevent false indications of the latch's status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional latch mechanism is used, then the structure is simple and easy to operate, but the latch is susceptible to tampering and human error (inadvertent unlocking)
Solution Approach 1:
A locking cam is introduced as an intermediary component between the bolt assembly and the mounting brackets. The locking cam includes a locking finger that engages with a locking surface on the pin, creating an additional layer of security. This intermediary element prevents inadvertent unlocking while maintaining reasonable operational complexity through tool-operated control.
2Reliability
If a tool-operated locking cam is added to the latch mechanism, then security against tampering is improved, but the device complexity increases
Solution Approach 1:
The locking cam is spring-loaded to automatically engage the locking finger with the locking surface when the bolt assembly is in the closed position. This self-service mechanism ensures secure engagement without requiring continuous manual intervention, while still allowing tool-operated disengagement when needed.
3Strength
If a locking cam with extending finger is implemented, then the latch provides better retention in latched condition, but the manufacturing complexity increases
Solution Approach 1:
The locking mechanism is segmented into distinct functional components: the locking cam with its extending finger, the pin with locking surface, and the spring-loaded assembly. This segmentation allows each component to be manufactured separately using standard machining processes, then assembled together, reducing overall manufacturing complexity while maintaining strong retention capability.
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 mechanism enhances security by requiring a tool for unlocking, minimizing the risk of accidental unlocking and providing clear visual indicators to ensure the latch is properly secured, thus enhancing resistance to tampering and human error.
Implementation Method 1
integrating a spring-loaded cam
Data Source
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AI summary
A latch mechanism for releaseably latching or holding a first member with respect to a second member in a structure. The latch mechanism includes a bolt assembly, mounting brackets, and a locking trigger. The latch mechanism also includes a rotatable locking cam for providing retention of the bolt assembly in a latched or locked condition.