Anti-theft Tag With Spring-Loaded Levered Locking Mechanism
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Solution Overview
Problem
Existing Electronic Article Surveillance (EAS) tags rely on ratchet mechanisms that require user-exerted force for engagement, leading to inconsistent locking strength and vulnerability to theft if insufficient pressure is applied, necessitating a more secure and reliable engagement method without damaging the article.
Innovation Solution
A theft-deterrent tag design featuring a first member with a fixed locking position relative to a second member, utilizing a levered mechanism with a fulcrum, a keeper for the lock mechanism, and a retainer with a biasing mechanism to ensure consistent pressure and secure engagement, preventing unauthorized removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ratchet mechanism is used to engage the tag with the article, then the tag can be secured to the article, but the locking position and engagement strength vary depending on the user-exerted force
Solution Approach 1:
The tag engagement mechanism automatically adjusts and locks at the optimal position without requiring user force adjustment. The spring-loaded retainer naturally engages with the article at the correct locking position, making the system self-regulating and eliminating dependence on user-exerted force for consistent engagement.
Solution Approach 2:
The mechanism changes the engagement parameter from user-force-dependent to spring-force-dependent. By using a spring-loaded retainer, the locking position and engagement strength become determined by the spring's physical properties rather than variable user input, ensuring consistent and reliable engagement across all uses.
2Strength
If the user does not exert sufficient pressure on the ratchet mechanism, then the tag engagement points loosely engage the article, but increasing user force is required to achieve proper locking
Solution Approach 1:
The spring-loaded retainer automatically provides the necessary engagement force without requiring the user to exert pressure. The system self-regulates the locking force based on the spring's properties, making the tag easy to apply while ensuring consistent engagement strength.
Solution Approach 2:
The spring mechanism is pre-loaded during manufacturing to provide the exact amount of engagement force needed. This preliminary setup eliminates the need for user force application, as the spring is already positioned and loaded to automatically engage the article with the correct locking strength.
3Reliability
If a ratchet mechanism requiring user force is used, then the tag can be engaged with the article, but the design becomes more complex and less reliable
Solution Approach 1:
The automated spring-loaded mechanism eliminates the need for complex user-operated ratchet mechanisms. The retainer spring automatically engages and locks the tag to the article, simplifying the overall design while improving reliability through consistent, force-independent engagement.
Solution Approach 2:
The invention replaces the manual mechanical ratchet system with an automated spring-loaded mechanical system. This substitution eliminates the need for user-operated ratchet movements and locking positions, simplifying the mechanism while enhancing reliability through passive, consistent engagement.
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 provides a more secure and reliable engagement of articles with EAS tags, enhancing theft deterrence by maintaining consistent pressure and structural integrity, while being simpler, more economical, and easier to use than existing technologies.
Implementation Method 1
a first member that is levered in relation to a second member at a fulcrum
Implementation Method 2
a retainer for engaging an article, with the retainer accommodating a biasing mechanism that enables the levered relationship between the first member and the second member
Data Source
AI summary
The present invention discloses a theft-deterrent tag, comprising a first member that has a fixed locking position in relation to a second member for securely engaging the theft-deterrent tag with an article, with the pressure exerted at tag engagement points and experienced by the article is commensurate with force exerted at the fixed locking position of the first member in relation to the second member and the article size.