EAS Tag Pin Locking and Detection Mechanism
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Solution Overview
Problem
Existing electronic article surveillance (EAS) tag detection systems are unreliable and prone to mis-alarms, with complex and costly assembly processes.
Innovation Solution
The EAS tag design includes receptacles with a ball cage and cone-shaped cup mechanism for locking and detecting a pin, using conductive elements like springs or foam for reliable electrical connections, and a microcontroller to monitor pin presence and integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical detection systems are used to sense unauthorised pin removal, then detection capability is provided, but reliability is poor and mis-alarms occur frequently
Solution Approach 1:
The patent replaces complex electrical detection systems with a simple electrical connection mechanism. When the pin is properly inserted, it completes an electrical circuit between the conductive element and contact element, providing a reliable and simple detection method that eliminates mis-alarms associated with complex electrical sensing systems.
Solution Approach 2:
The invention uses simple, inexpensive electrical connection components (conductive elements and contact elements) instead of complex, expensive detection systems. This approach prioritizes reliability and simplicity over sophisticated detection capabilities, using basic electrical conductivity to achieve accurate pin presence detection.
2Reliability
If complex electrical detection systems are assembled into EAS tags, then pin detection is enabled, but assembly difficulty increases and cost-effectiveness decreases
Solution Approach 1:
The detection function is segmented into simple, discrete electrical connection components (conductive element and contact element) that can be easily assembled. The pin itself serves as the connection element, eliminating the need for complex pre-assembled detection modules and significantly simplifying the manufacturing process.
Solution Approach 2:
The pin serves dual functions: it mechanically secures the attaching element to the EAS tag body and simultaneously provides the electrical connection for detection. This self-service approach eliminates the need for separate detection components, reducing assembly complexity and manufacturing costs.
3Reliability
If balls are used to lock the pin into the EAS tag body, then unauthorised removal is prevented, but the locking mechanism complexity increases
Solution Approach 1:
The patent combines the locking mechanism and detection mechanism into a unified structure. The same balls that provide mechanical locking also facilitate electrical contact when the pin is properly inserted, reducing overall system complexity while maintaining both security and detection functions.
Solution Approach 2:
The ball cage and balls serve multiple functions: they provide mechanical locking to prevent unauthorised removal, enable electrical detection when the pin is properly inserted, and maintain the structural integrity of the receptacle. This multi-functionality reduces the need for separate components.
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
This solution enhances the reliability of EAS tags, reduces mis-alarms, simplifies assembly, and lowers costs by ensuring accurate detection of pin placement and lanyard integrity, thereby improving shoplifting prevention while reducing retailer expenses.
Implementation Method 1
a first spring for supporting the ball cage into the cone shaped cup
Implementation Method 2
a conductive element having a first end and a second end, the first end being arranged in contact with the cone shaped cup and the second end being arranged in contact with a contact element inside the electronic article surveillance tag for conducting electrical current between the pin and the contact element
Implementation Method 3
The ball cage is made of a magnetically attractable material and the magnet is applied to the back side of the receptacle. The magnetically attractable ball cage is pulled partially from the cone shaped cup
Data Source
AI summary
The present invention relates to an electronic article surveillance tag that comprises at least one receptacle for receiving a pin. Each of the at least one receptacle comprises a plurality of balls supported by a ball cage for releasably locking the pin in the receptacle, a cone shaped cup arranged in contact with the plurality of balls, a first spring for supporting the ball cage into the cone shaped cup, and a conductive element, the first end of which is arranged in contact with the cone shaped cup and the second end of which is arranged in contact with a contact element inside the electronic article surveillance tag for conducting electrical current from the pin to the contact element.