Card Reader Terminal Detection Layout Against Insertion Hand Shake
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Solution Overview
Problem
Existing IC card processing devices inaccurately detect the presence of external connection terminals on metal cards due to hand shakes during insertion, leading to decreased detection accuracy.
Innovation Solution
A card reader design with a metal detecting mechanism positioned on the rear side of the external connection terminal, sandwiched between conveyance rollers, to stabilize the distance and reduce hand shake effects, ensuring accurate detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the IC contact detection sensor is disposed in the vicinity of the insertion slot, then the detection of external connection terminal is simple, but the detection accuracy deteriorates due to hand shake during card insertion
Solution Approach 1:
The patent moves the detection sensor from the insertion slot vicinity (horizontal dimension) to the card conveyance path (vertical/dimensional separation). By placing the sensor in the conveyance path where the card passes through, the system creates a spatial separation between the insertion action and detection action, eliminating the hand shake interference while maintaining detection functionality.
Solution Approach 2:
The card is conveyed through the conveyance path before reaching the detection sensor. This preliminary conveyance action stabilizes the card position and eliminates hand shake effects before detection occurs. The sensor detects the external connection terminal after the card has been properly positioned by the conveyance mechanism.
2Device complexity
If the metal card is processed with the sensor in the vicinity of insertion slot, then the detection mechanism is simple, but false detection occurs due to distance variation from hand shake
Solution Approach 1:
The card conveyance mechanism acts as an intermediary between the insertion slot and the detection sensor. It mediates the interaction by conveying the card through a controlled path, stabilizing its position, and presenting it to the sensor under controlled conditions, thereby eliminating false detections caused by hand shake-induced distance variations.
3Device complexity
If the IC contact detection sensor is placed near the insertion slot, then the device structure is compact, but the output varies due to hand shake during manual insertion
Solution Approach 1:
The patent relocates the sensor from the insertion slot area to the card conveyance path, creating dimensional separation. This allows the sensor to detect cards under stable, controlled conditions in the conveyance path, while the insertion slot remains dedicated to card insertion, eliminating the hand shake effect that destabilizes the sensor output.
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 design suppresses variations in the metal detecting mechanism's output due to hand shakes, maintaining high accuracy in detecting the presence of external connection terminals on metal cards.
Implementation Method 1
a metal detecting mechanism for detecting the external connection terminal
Data Source
AI summary
A card reader for processing a card having an external connection terminal of an IC chip includes a card insertion slot, a card conveyance path in which the card inserted from the card insertion slot is conveyed, a card conveyance mechanism structured to convey the card along the card conveyance path, and a metal detecting mechanism for detecting the external connection terminal. The card conveyance mechanism includes one or more conveyance roller pairs which contact with the card and convey the card in a sandwiching state and, when the conveyance roller pair disposed on the most front side, i.e., the card insertion slot side, is referred to as a first conveyance roller pair, the metal detecting mechanism is disposed on a rear side with respect to the external connection terminal of the card when a rear end of the card is sandwiched between the first conveyance roller pair.