Tamper-Evident Seal Assembly with Nested Locking Mechanism
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Solution Overview
Problem
Current metal lock security seals are vulnerable to tampering, as they can be easily cut and resealed, and attempts to tamper with them are not easily identifiable through visual inspection, providing low levels of safety and security.
Innovation Solution
A tamper-proof seal assembly comprising two components with locking grooves and protrusions, where the second component's tail element slides through vertical openings and locking devices engage with the first component's grooves and wall, making it difficult to tamper with and reassemble, and utilizing ultrasonic welding for a permanent fixing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ultrasonic welding is used to fix parts together, then manufacturing efficiency is improved, but security against tampering deteriorates
Solution Approach 1:
The seal is divided into multiple components including a head portion, a tail element, and a strap. The head portion contains a locking mechanism with locking protrusions and grooves that segment the security function from the binding function, making tampering detectable while maintaining manufacturing efficiency through modular assembly
Solution Approach 2:
The tail element is nested within the head portion, with the locking mechanism housed inside the head. The strap passes through the head portion and connects to the tail element, creating a nested structure where the security mechanism is contained within the seal head, providing both security and manufacturing efficiency
2Ease of manufacture
If a simple single-piece design is used, then ease of manufacture is improved, but detectability of tampering deteriorates
Solution Approach 1:
The seal comprises distinct segments including a head portion with locking mechanism, a tail element, and a strap. This segmentation allows visual inspection to detect tampering at the connection points between segments, while each segment remains relatively simple to manufacture
Solution Approach 2:
The seal includes visual indicators such as colored bands or markings on the strap and head portion that change or become visible when tampering occurs, enabling easy detection of security breaches while maintaining simple manufacturing processes
3Ease of repair
If the seal can be resealed by hot process, then ease of repair is improved, but security deteriorates
Solution Approach 1:
The seal is designed as a single-use security device where the locking mechanism is intended to be permanently engaged. The strap and head portion are configured so that once locked, the seal cannot be legitimately opened and resealed, making it a disposable security measure that maintains high security
Solution Approach 2:
The locking mechanism includes features that prevent any attempt at resealing, such as irreversible locking protrusions or tamper-evident elements that destroy the sealing function if tampering is attempted, thereby preemptively countering any repair or resealing actions
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 seal assembly provides enhanced security by making tampering attempts detectable through visual inspection and preventing reassembly, thus ensuring the secured articles remain tamper-proof.
Implementation Method 1
at least one locking device extends from the second component housing; and wherein the tail element slides through the at least two oppositely facing first component vertical openings to urge the second component housing inside the first component housing for simultaneously allowing the plurality of protrusions to lockingly engage with the plurality of locking grooves along with the at least one locking device to engage with a wall adjoining the first component vertical openings
Implementation Method 2
utilizing ultrasonic welding for a permanent fixing process
Data Source
AI summary
A seal assembly includes a first component housing molded on a first component. The first component housing has at least two oppositely facing first component vertical openings. A plurality of locking grooves are defined on a lower surface of the first component housing. The seal assembly further includes a second component housing molded on a second component. The second component housing adapts into a tail element emerging from the second component housing. The tail element slides through the at least two oppositely facing first component vertical openings to urge the second component housing inside the first component housing.