CARD READER AND ITS FOREIGN MATERIAL DETECTION METHOD

• Main Authors: WATANABE TAKEYOSHI, OZAWA SHIGEKI
• Format: Patent
• Language: English; Japanese
• Published: 28.02.2019
• Subjects: CALCULATING; CHECKING-DEVICES; COMPUTING; COUNTING; DETECTING MASSES OR OBJECTS; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING; HANDLING RECORD CARRIERS; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; MEASURING; PHYSICS; PRESENTATION OF DATA; RECOGNITION OF DATA; RECORD CARRIERS; TESTING

To provide a card reader and its foreign matter detection method capable of detecting foreign matter by using an electrostatic capacity sensor in the card reader in which an influence of a movable member can be reduced over a wide range and a cost can be reduced.SOLUTION: An opening/closing circuit for dividing an electrostatic capacity sensor into a plurality of areas each of which can detect electrostatic capacitance and electrically connecting and disconnecting the respective areas is provided. At least one of the plurality of areas, for example, at least one of remaining areas is arranged at a position susceptible to a movable structure in a position which is not easily influenced by the movable structure in a card reader.SELECTED DRAWING: Figure 2 【課題】静電容量センサを用いることによりカードリーダ内の異物を広範囲にわたって検知できるカードリーダにおいて、カードリーダ内の可動部材の影響を軽減するとともに、低コスト化を図る。【解決手段】それぞれが静電容量を検出できる複数の領域に静電容量センサを分割し、各領域間を電気的に接続し切り離す開閉回路を設ける。複数の領域のうちの少なくとも１つを、例えば、カードリーダ内の可動構造物の影響を受けにくい位置に配置し、残りの領域のうちの少なくとも１つを可動構造物の影響を受けやすい位置に配置する。【選択図】図２