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公开(公告)号：US20200381010A1
公开(公告)日：2020-12-03
申请号：US16955048
申请日：2018-12-04
Applicant: NIDEC SANKYO CORPORATION
Inventor： Jo TANAKA , Yohei SHIMIZU , YUFEI Gu
Abstract: 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.
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公开(公告)号：US20200034581A1
公开(公告)日：2020-01-30
申请号：US16337404
申请日：2017-09-06
Applicant: NIDEC SANKYO CORPORATION
Inventor： Yohei SHIMIZU , Shinya MIYAZAWA , Kazuto SAEKI
IPC: G06K7/08
Abstract: A card reader performs a reading operation of reading magnetic data by scanning the magnetic data in a first direction and a writing operation of writing the magnetic data by scanning the magnetic data in a second direction. Prior to these reading operation and writing operation, a head moving mechanism performs a preparatory operation of moving a magnetic head positioned in a head retracted position to a head contact position and a preliminary operation of moving the magnetic head slightly (e.g., about 1 mm) in the same direction as a scanning direction when the reading operation and the writing operation are performed. By performing the preliminary operation, even if a backlash caused by wearing due to use, gaps present for reasons of design, or the like increases and an unloaded area increases, a phenomenon that the head moving mechanism 8 operates unloaded during the preliminary operation can be eliminated.
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3.发明申请公开(公告)号：US20190005979A1
公开(公告)日：2019-01-03
申请号：US16019977
申请日：2018-06-27
Applicant: NIDEC SANKYO CORPORATION
Inventor： Katsuhisa HIGASHI , Ikuro KURIBAYASHI , Keiji MIYAZAWA , Yohei SHIMIZU
IPC: G11B5/09
CPC classification number: G11B5/09 , G06K7/08 , G11B5/00808
Abstract: 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.
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公开(公告)号：US20180075263A1
公开(公告)日：2018-03-15
申请号：US15563091
申请日：2016-03-29
Applicant: NIDEC SANKYO CORPORATION
Inventor： Kazutoshi ISHIKAWA , Katsuhisa HIGASHI , Yukihiko TAKITA , Yohei SHIMIZU
IPC: G06K7/08
CPC classification number: G06K7/087 , G06K7/08 , G06K7/10 , G06K19/073
Abstract: 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.
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5.发明申请公开(公告)号：US20170140180A1
公开(公告)日：2017-05-18
申请号：US15323158
申请日：2015-06-23
Applicant: NIDEC SANKYO CORPORATION
Inventor： Keiji HOSON , Ikuro KURIBAYASHI , Tomomi TAKEDA , Yohei SHIMIZU
IPC: G06K7/08
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US20200302129A1
公开(公告)日：2020-09-24
申请号：US16089368
申请日：2017-03-08
Applicant: NIDEC SANKYO CORPORATION
Inventor： Katsuhisa HIGASHI , Yohei SHIMIZU
IPC: G06K7/08 , G06K13/067
Abstract: A card reader (1) is provided with: a pre-head (50) which detects change in the magnetic field by magnetoresistive elements (21, 22); a voltage applying circuit (23) which applies a voltage to the pre-head (50); and a reference voltage circuit (30) which superimposes a reference voltage (V0) onto the voltage signal (S1) from the pre-head (50); the card reader is also provided with a signal processing circuit (24) which outputs a detection signal (S4) on the basis of the difference between the voltage signal (S1) and the reference voltage V0. Further, the card reader (1) is provided with a coupling capacitor (26) which is inserted between the pre-head (50) and the signal processing circuit (24), and a switching circuit (27) which connects the coupling capacitor (26) and the signal processing circuit (24) at the same time that voltage is applied to the pre-head (50) from the voltage applying circuit (23).
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公开(公告)号：US20210256228A1
公开(公告)日：2021-08-19
申请号：US17252422
申请日：2019-06-06
Applicant: NIDEC SANKYO CORPORATION
Inventor： Keiji MIYAZAWA , Yohei SHIMIZU , Satoru AOKI
Abstract: 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.
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公开(公告)号：US20200098393A1
公开(公告)日：2020-03-26
申请号：US16583265
申请日：2019-09-26
Applicant: NIDEC SANKYO CORPORATION
Inventor： Yohei SHIMIZU
Abstract: Provided is a magnetic recording medium processing device including a loading slot into which a magnetic recording medium, a medium movement path extending from the loading slot, a first magnetic head arranged in the medium movement path and detecting a magnetic signal from the magnetic recording medium, a magnetic information reproducer reproducing the magnetic information, based on a signal of a specific frequency included in analog signals output from the first magnetic head, an interfering magnetic field generator generating an interfering magnetic field along the medium movement path, and an interfering magnetic field controller controlling the interfering magnetic field generator to generate a first interfering magnetic field until the first magnetic head starts detecting the magnetic signal, and controlling the interfering magnetic field generator to generate a second interfering magnetic field different in frequency spectrum from the first interfering magnetic field while the first magnetic head detects the magnetic signal.
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公开(公告)号：US20160140366A1
公开(公告)日：2016-05-19
申请号：US14781413
申请日：2014-07-24
Applicant: NIDEC SANKYO CORPORATION
Inventor： Jo TANAKA , Shinya MIYAZAWA , Akihiro NEGISHI , Yohei SHIMIZU , Kazuto SAEKI
IPC: G06K7/08
CPC classification number: G06K7/087 , G06K7/0021 , G06K7/0069 , G06K13/067 , G06K13/0881
Abstract: Provided is a card reader that accepts and processes the short side of a substantially rectangular IC card conforming to international and JIS standards, said card reader being capable of easily determining whether or not the orientation of the inserted IC card is correct. This card reader comprises: an insertion port wherein a card having a built-in IC chip is inserted; a metal detection mechanism for detecting an external connection terminal of the IC chip formed in the card; and a tip detection mechanism for detecting the tip, in the insertion direction, of the card inserted from the insertion port. In this card reader, the metal detection mechanism and the tip detection mechanism are provided such that, when the tip detection mechanism detects the tip, in the insertion direction, of the card inserted in the correct orientation from the insertion port, the metal detection mechanism is arranged at a position that detects the external connection terminal.
Abstract translation: 提供了一种读卡器，其接受和处理符合国际和JIS标准的大致矩形的IC卡的短边，所述读卡器能够容易地确定插入的IC卡的取向是否正确。 该读卡器包括：插入端口，其中插入具有内置IC芯片的卡; 金属检测机构，用于检测形成在卡中的IC芯片的外部连接端子; 以及尖端检测机构，用于检测从插入口插入的卡片在插入方向上的尖端。 在该读卡器中，金属检测机构和前端检测机构被设置成使得当尖端检测机构在从插入口以正确的方向插入的卡片的插入方向上检测到尖端时，金属检测机构 被布置在检测外部连接端子的位置。
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公开(公告)号：US20190130935A1
公开(公告)日：2019-05-02
申请号：US16089386
申请日：2017-03-08
Applicant: NIDEC SANKYO CORPORATION
Inventor： Katsuhisa HIGASHI , Yohei SHIMIZU
CPC classification number: G11B5/00808 , G06K7/08 , G11B5/09 , G11B5/105 , G11B5/17 , G11B5/3109
Abstract: 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 reader 1 is provided with a magnetic head 6 which reads and writes magnetic information. Bidirectional diodes 54A, 54B are arranged inside of a head case 21 of the magnetic head 6. A write signal from a write circuit 72 is inputted via the bidirectional diodes 54A, 54B to a writing coil 34 wound around a core 32 of the magnetic head 6. The bidirectional diodes 54A, 54B and a demodulation IC 61 are mounted on a first board surface 62A of a control circuit board 62, and the control circuit board 62 is fixed to the head case 21 so that the bidirectional diodes 54A, 54B and the demodulation IC 61 are covered by the head case 21.
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