Tamper-Resistant Security Device for Cylindrical Objects
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Solution Overview
Problem
Existing EAS security devices for cylindrical objects like bottles are vulnerable to tampering, as they can be easily compromised by thieves, and previous solutions such as reducing clearance or increasing force requirements often interfere with the device's operation or increase costs.
Innovation Solution
A magnetically actuable locking mechanism with a flexible element and a tamper-resistant notch is integrated into a security device that securely fits around the outer diameter of cylindrical objects, preventing unauthorized access by guiding unauthorized objects into a tamper-defeat notch, thereby enhancing security without operational interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional barrier parts are added to prevent tampering, then security is improved, but device complexity and cost increase
Solution Approach 1:
The housing is segmented into multiple parts (first housing part and second housing part) that can be assembled together to form the complete housing. This segmentation allows for easier manufacturing and assembly while maintaining security functionality through the integrated latch mechanism and tamper-defeat notch design.
Solution Approach 2:
The latch mechanism features an asymmetric design with a tamper-defeat notch positioned at a specific location that prevents unauthorized objects from effectively engaging the latch. The notch's strategic placement creates an asymmetric vulnerability that only allows authorized access while blocking tampering attempts.
2Reliability
If clearance between strap and housing is reduced to prevent tampering, then security is improved, but friction increases and operation is interfered with
Solution Approach 1:
The latch mechanism acts as an intermediary between the strap and housing, providing a controlled interface for connection and disconnection. The tamper-defeat notch in the latch creates a selective gateway that allows authorized objects to engage the latch while blocking unauthorized tampering attempts, thus maintaining both security and operational ease.
3Reliability
If force required to raise latch is increased to prevent tampering, then security is improved, but authorized operation is prevented
Solution Approach 1:
The latch mechanism exhibits local quality differentiation through the tamper-defeat notch, which creates a specific geometric feature that responds differently to various types of forces. Authorized objects with the correct geometry can easily engage the latch, while unauthorized objects encountering the notch experience increased resistance, thus providing security without preventing authorized operation.
4Reliability
If cavity traps are placed in housing to guide unauthorized objects, then security is improved, but effectiveness is limited to certain angles and can be defeated
Solution Approach 1:
The tamper-defeat notch extracts the anti-tamper functionality from complex cavity trap structures and implements it through a simple geometric feature directly on the latch. This notch provides continuous protection against tampering attempts from various angles without requiring multiple cavity traps, thereby improving both security and adaptability.
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 solution effectively prevents tampering while maintaining the device's operational efficiency, providing a cost-effective and adaptable security solution for cylindrical objects with varying neck diameters.
Implementation Method 1
The flexible element biases the magnetically actuable latch and the belt into a locked position
Implementation Method 2
A magnetically actuable locking mechanism is provided including a magnetically actuable latch
Data Source
AI summary
A method and device for protecting an article, wherein the security device has belt having a latch mating element. A magnetically actuable locking mechanism has a magnetically actuable latch and a flexible element. The magnetically actuable latch includes a lower surface having at least one protrusion extending there from and adapted to engage with the latch mating element of the belt, and a front surface adjacent the lower surface. The front surface has a lateral notch formed therein. The flexible element biases the magnetically actuable latch and the belt into a locked position. A housing has the magnetically actuable latch disposed therein and housing includes a passageway therein defining a belt pathway configured to slidingly receive the belt therein.