Security Device with Integrated Alarm and Locking Mechanism
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Solution Overview
Problem
Existing security devices for merchandise, such as cable wrap security devices, can be circumvented by removing the EAS tag, and there is a need for additional security features to enhance their effectiveness in preventing unauthorized removal and tampering.
Innovation Solution
A security device with a housing, spool, plug, and cable that includes a locking mechanism and an alarm circuit to prevent unauthorized removal and tampering, featuring a plug with inserted and removed positions that alter the locking mechanism's state and activate an alarm upon sensing discontinuity or movement of the plug, ensuring secure attachment to an object and preventing access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cable wrap security device with ratchet mechanism is used to secure merchandise, then the security device prevents unauthorized removal and tampering, but the device can still be circumvented by removing the EAS tag
Solution Approach 1:
The patent combines the EAS tag housing with the cable wrap security device into a single integrated unit. The EAS tag is permanently enclosed within the housing, making it impossible to remove without destroying the housing structure. This merging ensures that the security device and EAS tag function as one unified system, eliminating the vulnerability of separate components.
Solution Approach 2:
The patent incorporates alarm circuits that are pre-configured to detect and respond to tampering attempts before the EAS tag can be successfully removed. The alarm system is activated in advance and continuously monitors the integrity of the housing and cable assembly, providing immediate alert when unauthorized access is attempted.
2Reliability
If a locking mechanism with plug is used to control cable rotation, then the security device prevents unauthorized loosening, but the device complexity increases
Solution Approach 1:
The patent divides the locking mechanism into distinct functional segments: a plug component with alarm circuitry, a receptacle integrated into the housing, and a ratchet mechanism. This segmentation allows each component to perform its specific function independently, simplifying the overall design while maintaining security. The plug can be easily inserted or removed without affecting the other components.
Solution Approach 2:
The plug serves multiple functions simultaneously: it engages with the receptacle to prevent cable loosening, houses the alarm circuitry, and provides a interface for authorized operation. This multi-functionality reduces the need for separate components, thereby reducing overall device complexity while maintaining locking security.
3Reliability
If an alarm circuit is added to detect cable discontinuity and plug movement, then unauthorized removal is detected, but the device complexity and cost increase
Solution Approach 1:
The alarm circuit is integrated into the plug component, merging the alarm functionality with the existing locking mechanism. This integration eliminates the need for separate alarm housing and wiring, reducing overall device complexity. The alarm circuit utilizes the existing electrical connections within the plug-receptacle interface.
Solution Approach 2:
The alarm circuit is designed to detect multiple types of tampering through a single sensing mechanism: cable discontinuity, plug removal, and housing tampering. This multi-detection capability is achieved through universal sensing elements that respond to various intrusion methods, reducing the need for multiple specialized sensors and simplifying the circuit design.
Data Source
AI summary
A security device includes: a housing having a plug receptacle; a spool rotatably coupled to the housing; a locking mechanism having a locked state and an unlocked state, the locked state preventing the spool from rotating in a first direction, and the unlocked state allowing rotation of the spool in the first direction and in a second direction; a plug having an inserted position and a removed position with respect to the plug receptacle, the inserted position maintaining the locking mechanism in the locked state, and the removed position allowing alteration of the locking mechanism from the locked state to the unlocked state; a cable coupled to the spool and to the plug; an alarm circuit which activates an alarm upon sensing discontinuity of the cable and/or the plug moving from the inserted position to the removed position, the alarm circuit coupled to and rotating with the spool.