Nidec Sankyo Corporation

Yohei Shimizu

Katsuhisa Higashi

Jo Tanaka

Shinya Miyazawa

Yukihiko Takita

Ikuro Kuribayashi

Keiji Miyazawa

Kazutoshi Ishikawa

Keiji Hoson

Akihiro Negishi

Tomomi Takeda

Kazuto Saeki

Satoru Aoki

Yufei Gu

A magnetic field generation device may include a coil generating a magnetic field, a drive part configured to apply a voltage to the coil or supply a current to the coil, a monitoring part configured to acquire state information whose value is varied together with temperature of the coil, and a control part which controls the voltage applied by the drive part or the current supplied by the drive part based on the state information acquired by the monitoring part.

Magnetic field generation device, magnetic recording medium processing apparatus, and magnetic field generation method

A card reader includes a writing coil that is provided to a magnetic head for recording magnetic data in a magnetic card, and a drive circuit that supplies a write current to the writing coil. The drive circuit is a chopping circuit that supplies a chopping current, on/off of which is switched in a specified cycle, as the write current to the writing coil. An on/off cycle of the chopping current is a cycle in which a length of a magnetized pattern in a recording direction is shorter than a reading gap formed in a core around which the writing coil is wound or a core around which a reading coil being separately provided from the writing coil is wound, the magnetized pattern in the recording direction being formed in the magnetic card by the chopping current in a period including one each of the on and the off.

Card reader having chopping drive circuit with cycle shorter than reading gap and control method for card reader

This magnetic head, which reads and writes magnetic information, prevents a signal from being read between the magnetic head and the write circuit during reading of magnetic information. A card readeris provided with a magnetic headwhich reads and writes magnetic information. Bidirectional diodesA,B are arranged inside of a head caseof the magnetic head. A write signal from a write circuitis inputted via the bidirectional diodesA,B to a writing coilwound around a coreof the magnetic head. The bidirectional diodesA,B and a demodulation ICare mounted on a first board surfaceA of a control circuit board, and the control circuit boardis fixed to the head caseso that the bidirectional diodesA,B and the demodulation ICare covered by the head case

Magnetic head and magnetic recording medium processing device

A magnetic field generator may include a magnetic field generation part including a resonance part including an inductor and a capacitor connected with each other, and which is structured so that an AC current is flowed between the inductor and the capacitor by charging electric charge to the capacitor and discharging the electric charge to generate a magnetic field by a resonance; a current direction monitoring section structured to monitor a direction of a current flowing through the inductor of the magnetic field generation part; and a judging section structured to control a timing for charging in the magnetic field generation part depending on the direction of the current flowing through the inductor which is obtained by monitoring of the current direction monitoring section.

Magnetic field generator, control method for magnetic field generator, and magnetic recording medium processing device

A magnetic recording medium processing device may include a magnetic recording medium insertion slot; a medium pathway connected to the magnetic recording medium insertion slot; a magnetic head arranged to face the medium pathway; and an interference magnetic field generating device structured to generate interference magnetic fields outside the magnetic recording medium insertion slot. The interference magnetic field generating device may include a coil, a capacitor, a first power line, a second power line to which a voltage different from that to the first power line is applied, multiple switches structured to switch the connections between the first power line and the second power line of the coil and the capacitor, and a switch control unit structured to control the multiple switches.

Magnetic recording medium processing device and method of generating interference field

A card reader may include a card insertion port; a magnetoresistive (MR) sensor; and a disturbing magnetic field generator, wherein the card may include a magnetic stripe, and magnetic data recorded in the magnetic stripe may be arranged in a moving direction of the card inserted through the card insertion port. The MR sensor may include a first resistor and a second resistor separated by a distance which is less than a bit interval of magnetic data, in a case that '0' data are recorded in the magnetic stripe, in the moving direction of the card.

Card reader

A card reader for use with a card incorporated with an IC chip may include an insertion port into which the card is inserted; a metal detection mechanism structured to detect an external connection terminal of the IC chip provided in the card; and a tip end detection mechanism structured to detect a tip end in an inserting direction of the card inserted into the insertion port. The metal detection mechanism and the tip end detection mechanism may be disposed so that, when the tip end detection mechanism detects the tip end in the inserting direction of the card inserted into the insertion port in a correct posture, the metal detection mechanism detects the external connection terminal.

Card reader and control method therefor

A card reader for use with a card may include a card insertion part formed with an insertion port into which the card is inserted; and a magnetic head provided in the card insertion part and structured to contact with the card. A magnetic gap in a straight shape may be formed at a tip end of the magnetic head where the card is to be contacted. When a forming direction of the magnetic gap formed in the straight shape is a gap direction, the gap direction may be inclined with respect to a first direction perpendicular to an inserting direction of the card when viewed in a thickness direction of the card inserted into the insertion port.

Growing community of inventors

Nagano, Japan

Yohei Shimizu