Wireless Theft-Prevention Device Using Magnetic Induction
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Solution Overview
Problem
Current theft-prevention technologies for retail electronic devices are inflexible, provide unsatisfactory user experience, require complicated wiring, and have stringent environmental requirements, limiting their effectiveness and usability.
Innovation Solution
A theft-prevention exhibition device comprising a first unit with a microprocessor, RF transceiver, alarm, and power supply, and a second unit with a magnetic induction coil and wire winder, allowing for wireless communication and minimal power usage, enabling simple wiring and operation in adverse environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical connection-based theft-prevention technology is used, then theft prevention capability is improved, but device complexity and wiring complexity increase
Solution Approach 1:
The patent replaces electrical connection-based theft prevention with a magnetic field-based system. The first unit generates a magnetic field that is detected by the second unit attached to the display object, eliminating the need for complex electrical wiring while maintaining theft prevention capability. This substitution of mechanical/electrical systems with magnetic field interactions directly resolves the contradiction between reliability and device complexity.
2Measurement precision
If active communication-based identification technology is used, then identification capability is improved, but device size and environmental requirements worsen
Solution Approach 1:
The patent extracts the power source requirement from the identification system. The second unit uses passive magnetic field detection without requiring an active battery or power source, unlike active communication-based systems. This extraction of the power source element enables precise identification capability while eliminating the bulk and environmental constraints associated with battery-powered devices.
3Ease of manufacture
If purely physical theft-prevention technology is used, then implementation simplicity is improved, but user experience deteriorates
Solution Approach 1:
The patent creates a multi-functional system where the magnetic field-based first unit can work with multiple different second units attached to various display objects. This universal approach maintains implementation simplicity while providing flexible, adaptable user experiences across different product types, resolving the contradiction between ease of manufacture and ease of operation.
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 satisfactory user experience, easy serviceability, and high security with reduced complexity and environmental constraints, ensuring effective theft prevention in retail settings.
Implementation Method 1
a magnetic induction coil, and a wire winder (wire retractor) are provided in the second unit
Data Source
AI summary
A theft-prevention exhibition device includes a first unit, which comprises a microprocessor, a radiofrequency (RF) transceiver, a first alarm, a first switch, a power source, wherein the microprocessor is electrically connected with the RF transceiver, the first alarm, and the first switch; a second unit, which comprises a memory, a magnetic induction coil, and a wire retractor; a connecting plate adapted to be connected to a display item, wherein the connecting plate comprises a second switch; a wire rope spooled on the wire retractor and connected to the connecting plate, wherein the wire rope connects with the second switch, the memory, and the magnetic induction coil to form a circuit.