Card Reader Protrusion and Breakage Detection Wiring
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Solution Overview
Problem
Existing card readers are vulnerable to magnetic data swindling due to the ease of attachment of magnetic data swindle members at the card insertion port, which can lead to illegal data acquisition.
Innovation Solution
A card reader design featuring a protruded part on the front face with a breakage detection wiring inside, making it difficult to attach a magnetic data swindle member and incorporating a detection mechanism to prevent data swindling by detecting disconnection or short circuits of the breakage detection wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the card insertion port is formed in a flat shape, then the ease of manufacture is improved, but the vulnerability to magnetic data swindling increases
Solution Approach 1:
The card insertion port is designed with an asymmetric structure where a protrusion extends from the front face, creating an uneven surface profile. This asymmetric geometry prevents the attachment of magnetic data swindle members while maintaining ease of manufacture through simple molding processes.
Solution Approach 2:
The solution transitions from a two-dimensional flat card insertion port to a three-dimensional structure with a protrusion. By adding depth and vertical dimension to the front face, the design creates physical obstruction against swindle members while preserving manufacturing simplicity.
2Reliability
If a protruded part is added to the front face, then the reliability against data swindling is improved, but the device complexity increases
Solution Approach 1:
The front face is segmented into distinct functional zones: a protrusion portion that provides physical protection and a recessed card insertion area. This segmentation allows the protrusion to serve as a dedicated security feature without complicating the overall device structure.
Solution Approach 2:
The protrusion structure provides self-protection functionality by physically preventing swindle member attachment without requiring additional active security systems, sensors, or complex control mechanisms. The geometric design itself delivers the security function.
3Difficulty of detecting and measuring
If breakage detection wiring is provided inside the protruded part, then the detection capability is improved, but the manufacturing complexity increases
Solution Approach 1:
The breakage detection wiring is merged with the existing flexible printed circuit board structure. The wiring is integrated into the PCB layers rather than being separate components, allowing detection functionality to be added during standard PCB manufacturing without requiring additional assembly steps.
Solution Approach 2:
The flexible printed circuit board serves multiple functions: it provides electrical connections for card data transmission and simultaneously houses breakage detection wiring within its layered structure. This multi-functionality eliminates the need for separate detection circuit boards or wiring harnesses.
Data Source
AI summary
A card reader for use with a card may include a card insertion part provided with an insertion port into which the card is inserted, a protruded part which is provided on a front face of the card insertion part and is protruded to a front side with respect to the card insertion part, a breakage detection wiring which is provided in an inside of the protruded part, and a detection part which detects at least one of disconnection and a short circuit of the breakage detection wiring.