Electronic Anti-Theft Device With Independent Alarm Triggering
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Solution Overview
Problem
Existing reusable anti-theft devices can be easily detached from items within a store using a magnet, rendering them ineffective and allowing theft without triggering an alarm.
Innovation Solution
An electronic anti-theft device that requires separate deactivation using a standard electronic tag deactivator and cannot be deactivated by a magnet, ensuring it remains operational only when properly authorized.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If reusable anti-theft devices use magnetic locking that can be opened with a detacher magnet, then ease of operation is improved, but security is worsened because thieves can easily detach the device without triggering an alarm
Solution Approach 1:
The patent divides the anti-theft device into two independent functional systems: a magnetic locking system for attachment/detachment and a separate alarm triggering system. The alarm system includes its own sensor, processor, and output device that operates independently from the magnetic lock, allowing the alarm to trigger even when the magnetic lock is opened with a detacher magnet.
Solution Approach 2:
The patent implements a feedback mechanism where sensors continuously monitor the state of the anti-theft device (attached, detached, or tampered with) and provide this information to a processor. The processor then triggers the alarm output based on detected unauthorized actions, creating a closed-loop security system that responds to attempts to bypass the magnetic lock.
2Ease of operation
If reusable anti-theft devices are designed to be opened with a magnet, then ease of operation at checkout is improved, but reliability is worsened because the device can be opened inside the store without triggering an alarm
Solution Approach 1:
The patent separates the magnetic locking function from the alarm triggering function into independent systems. The magnetic lock uses a detacher magnet for easy opening at checkout, while the alarm system uses separate sensors and processors that monitor for unauthorized opening attempts and trigger alerts independently of the magnetic lock's opening mechanism.
Solution Approach 2:
The patent introduces intermediary sensors and a processor that act as mediators between the physical state of the device and the alarm output. These intermediaries detect whether the device is being opened legitimately at checkout or illicitly inside the store and appropriately trigger or suppress the alarm based on the detected context.
3Reliability
If an integrated alarm system is added to detect unauthorized opening, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the alarm triggering components (sensors, processor, output device) into a single integrated module that is incorporated directly into the anti-theft device housing. This consolidation reduces the need for separate external components and simplifies the overall system architecture while maintaining full theft detection capability.
Solution Approach 2:
The patent designs the integrated alarm module to perform multiple functions: detecting attachment/detachment states, monitoring for tampering, triggering local alarms, and potentially communicating with remote monitoring systems. This multi-functionality reduces the need for separate specialized components for each function.
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
Prevents theft by automatically triggering an alarm if the device is uncoupled without prior deactivation, maintaining functionality and reducing the need for new equipment, thus providing a cost-effective security solution.
Implementation Method 1
an electronic unit for controlling the integrated alarm which is capable of activating, triggering and deactivating it, the electronic unit being capable of detecting the closing of the electronic anti-theft device
Implementation Method 2
RF technology to deactivate RF tags (by emitting a powerful signal at the resonant frequency of the tag's resonant circuit, creating a surge that destroys the circuit's micro-capacitor)
Implementation Method 3
The anti-theft device is unlocked at the checkout by positioning the locking and unlocking means against a powerful magnet, commonly called a 'detacher'
Data Source
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Figure 5~6
AI summary
electronic anti-theft device (1) intended to be assembled on an article to be protected from theft, in particular an electronic anti-theft device for self-service items in a store, comprising a remote alarm triggering system (11), and locking and unlocking means (3) for the anti-theft device which are capable of configuring the anti-theft device respectively, either in a closed position or in an open position, characterized in that it further comprises an integrated alarm (12) and an electronic unit (6) for controlling the integrated alarm which is capable of activating, triggering and deactivating it, deactivation being caused by positioning the electronic anti-theft device against an electronic tag deactivator.