Tamper-Indicating Tether System for Life Vest Box
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Solution Overview
Problem
Current security devices for life vest boxes, such as plastic padlocks and stickers, fail to provide a clear and visible indication of tampering, and may not prevent manipulation to make it appear as if the box has not been opened.
Innovation Solution
A tamper-indication system comprising a base secured to the door of the container, a retainer on the housing, and a tether with a weakened area that breaks when the door is opened, separating a flag from the base to indicate tampering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If plastic padlocks are used for security, then the difficulty of opening the door increases, but the clarity of tampering indication deteriorates
Solution Approach 1:
The security system is divided into separate functional components: a base attached to the door, a flag attached to the base, and a tether connecting the flag to the retainer on the housing. This segmentation allows the tamper indicator (flag) to be visually distinct from the locking mechanism, providing clear tampering indication while maintaining security through the tether constraint.
Solution Approach 2:
Different parts of the system have specialized functions optimized for their specific roles: the base provides mounting and structural support, the flag provides visual indication, and the tether provides constraint and breakage indication. This local optimization ensures that each component excels at its specific function, resolving the contradiction between security and indication clarity.
2Loss of information
If stickers are used for tamper indication, then visibility of tampering is improved, but resistance to opening the door deteriorates
Solution Approach 1:
The invention merges multiple functions into a single integrated system: the flag serves as both the visual indicator and the constrained element, the tether serves as both the constraint mechanism and the breakage indicator, and the base serves as both the mounting structure and the flag support. This merging eliminates the need for separate stickers while maintaining visibility and adding security resistance.
Solution Approach 2:
The flag-tether-base assembly serves multiple functions simultaneously: it provides visual indication of tampering, resists door opening through tether constraint, and indicates successful tampering through tether breakage. This multi-functionality replaces the single-function sticker while adding security without sacrificing visibility.
3Reliability
If manipulation prevention is strengthened, then reliability of tamper indication is improved, but device complexity increases
Solution Approach 1:
The flag is pre-attached to the base and the tether is pre-attached to both the flag and the retainer in a predetermined configuration. This preliminary setup ensures that any manipulation attempt will necessarily involve breaking the tether, providing reliable tamper indication without requiring complex monitoring or detection systems.
Solution Approach 2:
The tether is designed as a disposable, low-cost component that is intended to break upon tampering. This simple, inexpensive element provides reliable tamper indication through its irreversible breakage, avoiding the need for complex, expensive, or manipulatable electronic or mechanical security systems.
Data Source
AI summary
A system for indicating tampering of a container (such as a life vest box within an internal cabin of a vehicle) includes a base configured to be secured to a door of the container. A retainer is configured to be secured to a portion of a housing of the container. A tamper indicator includes a flag coupled to the base, and a tether extending from the flag. The tether is coupled to the retainer. The tether includes a weakened area that is configured to break to separate the flag from the base in response to the door of the container being opened.