JP2011192182A - Magnetic reading device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic reading device where magnetic data recorded on a magnetic recording medium are not stolen by an illegal magnetic recorder. <P>SOLUTION: The magnetic reading device is provided with: a foreign substance detection part which detects whether a foreign substance exists in the vicinity of a card slot through which the insertion or discharge of a magnetic card is performed; a magnetic field generating part which generates an interference magnetic field for interfering with the magnetic field discharged from the foreign substance in the vicinity of the card slot; and a control part which determines whether the foreign substance detection part has detected the foreign substance, and when determining that the foreign substance detection part has detected the foreign substance, displaces the intensity of the interference magnetic field which the magnetic field generating part generates. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a magnetic reading device having a function of preventing illegal reading of magnetic data of a magnetic information recording medium and reading magnetic data of the magnetic information recording medium.

  Records cash transaction processing devices such as cash dispensers (CDs) and automated teller machines (hereinafter ATMs), and magnetic information such as cards and passbooks. In a transaction processing terminal for performing transaction processing using the recorded medium, an illegal magnetic reader equipped with a magnetic head is installed so as to cover the insertion slot of the magnetic information recording medium of the original magnetic reader, and the magnetic stripe There is a crime A called skimming that illegally obtains magnetic information. As measures against this, Measure 1 for detecting an attached illegitimate magnetic reader, Measure 2 for making it difficult for the illegitimate magnetic reader to read magnetic data by intermittently driving and taking in and returning the magnetic information recording medium, Various techniques such as Measure 3 for preventing an illegal magnetic reader from functioning by a magnetic field have been disclosed.

  As one of such techniques, there is a magnetic card transaction apparatus that generates a magnetic field in an area of an outer portion of a magnetic card insertion / ejection card slot and obstructs an illegal magnetic reader (see, for example, Patent Document 1). . In this magnetic card transaction apparatus, even if the magnetic head is illegally attached to the outside of the card slot, the magnetic card inserted or ejected using the illegal magnetic head is read by the disturbing magnetic field generated by the magnetic field generating means. Can be prevented.

  In addition, there is a magnetic reading device in which a loop antenna is installed around the insertion opening of the magnetic information recording medium to obstruct reading of magnetic information in front of the insertion opening (see Patent Document 2). In this magnetic reading device, a loop antenna attached to surround the magnetic information recording medium, an oscillator for generating a magnetic field from the loop antenna, and a medium detection for detecting the magnetic information recording medium inserted in the insertion slot When the medium detection sensor detects the magnetic information recording medium, the oscillator generates a magnetic field from the loop antenna, thereby preventing magnetic data reading of the magnetic information recording medium in front of the insertion slot. .

JP 2001-67524 A JP 2005-266999 A

  In Patent Document 1 described above, the magnetic field generation unit generates a magnetic field in a region including a passage path through which the magnetic stripe of the magnetic card passes in the outer portion of the card slot. If a fraudulent magnetic reader (eg, a magnetic plate) is installed so as to block the magnetic field from the magnetic field generator, the magnetic data can be read by the fraudulent magnetic reader. There was a problem that sometimes.

  As shown in FIG. 11, the magnetic field is generated when the magnetic information recording medium is inserted and ejected. Therefore, from when the user inserts the magnetic information recording medium to when the insertion of the magnetic information recording medium is detected (A in FIG. 11), from when the magnetic information recording medium is ejected until the user pulls out the magnetic information recording medium. During this period (B in FIG. 11), there was a problem that the magnetic information was read by the unauthorized magnetic reader.

  Moreover, in patent document 2, the loop antenna attached so that the circumference | surroundings of an insertion opening may be enclosed as a magnetic field generation | occurrence | production part, and the magnetic field of a some frequency is generated. However, as in the case of Patent Document 1, when an illegal magnetic reader is installed so as to block a magnetic field, there is a problem that magnetic data can be read by the illegal magnetic reader.

  An object of the present invention is to provide a magnetic reading device in which magnetic data recorded on a magnetic recording medium is not stolen by the illegal magnetic reading device even when the illegal magnetic reading device is installed so as to block the magnetic field. It is to provide.

  In order to achieve the above-described object, a magnetic reading apparatus according to the present invention includes a foreign matter detection unit that detects whether or not there is a foreign matter near a card insertion slot for inserting or ejecting a magnetic card, and the vicinity of the card insertion slot. A magnetic field generation unit that generates a disturbing magnetic field for preventing a magnetic field emitted from the foreign matter, and whether or not the foreign matter detection unit has detected the foreign matter, and the foreign matter detection unit has detected the foreign matter. A control unit that displaces the intensity of the disturbing magnetic field generated by the magnetic field generation unit when it is determined.

  According to the present invention, there is provided a magnetic reader in which magnetic data recorded on a magnetic recording medium is not stolen by the illegal magnetic reader even when the illegal magnetic reader is installed so as to block the magnetic field. Can be provided.

It is a block diagram which shows the structure of the principal part of the magnetic reader concerning this embodiment. (A) It is the schematic which shows the internal structure of the magnetic reader concerning this embodiment. (B) It is a figure which shows the positional relationship of an insertion port and a core. (C) It is a figure which shows thanks when the loop antenna is arrange | positioned above and below an insertion port. (A) It is a flowchart which shows the process sequence of the initial operation after the power supply of a magnetic reader is turned on. (B) It is a flowchart which shows the process sequence of a foreign material detection process. It is a flowchart which shows the process sequence in case the magnetic reader concerning this embodiment performs the taking-in operation of a card | curd, or reading operation. It is a flowchart which shows the process sequence in case the magnetic reader concerning this embodiment performs the return operation | movement of a card | curd. It is a figure which shows a mode that it controls to increase the electric current sent through a loop antenna with respect to a magnetic field generation | occurrence | production part, and enlarges a generated magnetic field. It is a figure which shows a mode that a magnetic field control part changes a frequency, when a foreign material detection part detects a foreign material. It is a block diagram which shows the structure of the principal part of the magnetic reader which installed the ammeter. It is a flowchart which shows the process sequence of the taking-in operation | movement of a card | curd in the case where a core is not installed, and reading operation. (A) It is a timing chart of the magnetic field which a magnetic field generation part always generates with respect to the front side of an insertion slot. (B) It is a timing chart of the magnetic field which a magnetic field generation part produces | generates when the process of the flowchart shown in FIG. 9 is performed. It is a figure which shows the generation | occurrence | production time of the magnetic field by a prior art.

  Hereinafter, an embodiment of a magnetic reading apparatus according to the present invention will be described in detail with reference to FIGS.

  FIG. 1 is a block diagram showing the configuration of the main part of the magnetic reading apparatus 1 according to the present embodiment. The magnetic reader 1 includes a control unit (CPU) 2 that controls the operation of the main body, a magnetic information reading unit 3 that reads magnetic data recorded on a magnetic card inserted into the main body, and a card that is inserted into the main body. A card transport path 4 for transporting, a card position sensor 5 for detecting the position of the card in the card transport path 4, a memory 6 for storing magnetic information read by the magnetic information reading section 3, and a connection section with a host device. The host interface 7, the card insertion slot unit 24 installed on the front surface of the main body, the magnetic field generator 8 installed in the card insertion slot unit 24 and generating a magnetic field, and the magnetic field control for controlling the operation of the magnetic field generator 8 Unit 9, a foreign object detection unit 10 that is installed in the card insertion slot unit 24 and detects a foreign object installed outside the magnetic reader 1, and a foreign object that controls the operation of the foreign object detection unit 10. A knowledge control section 11, a card transport control section 40 for controlling the conveyance of the card is configured to include a customer detection sensor 50 for detecting the user, the.

  FIG. 2A is a schematic diagram showing the internal structure of the magnetic reading apparatus 1 according to the present embodiment. In FIG. 2A, reference numeral 21 denotes a magnetic card (hereinafter referred to as card 21). An insertion slot 22 into which the card 21 is inserted is formed on the front surface of the magnetic reader 1 main body. An insertion detection sensor 23 that detects the card 21 inserted into the insertion slot 22 is provided near the insertion slot 22. The insertion detection sensor 23 is a pressure sensor and is disposed at a position pressed by the card 21 inserted from the insertion port 22.

  A pair of transport rollers 25 to 28 that sandwich and transport the card 21 are arranged in the transport direction of the card 21. The magnetic reading apparatus 1 forms a card 21 conveyance path as a card conveyance path 4 by these conveyance rollers 25 to 28. One of the pair of conveying rollers 25 to 28 is a driving roller to which the rotational force of the motor is transmitted, and the other is a driven roller that is rotated by the driving roller. There is one motor (not shown) that drives the transport rollers 25 to 28.

  The card conveyance control unit 40 takes in the card 21 and discharges (returns) the card by controlling the rotation (including the rotation direction and rotation speed) and stop of the motor. The magnetic information reading unit 3 includes a magnetic head 29 that reads magnetic information recorded on the magnetic stripe of the card 21 being conveyed through the card conveyance path 4 formed by the conveyance rollers 25 to 28. In addition, sensors 30 to 33 that detect the presence or absence of the card 21 are arranged along the conveyance path of the card 21. The arrangement interval of the sensors 30 to 33 is shorter than the length of the card 21 in the transport direction. The sensors 30 to 33 are optical sensors each composed of a light emitting unit and a light receiving unit (both not shown), and are arranged with the light emitting unit and the light receiving unit facing each other across the conveyance path.

  The sensor 30 is for detecting that the card 21 is sandwiched between the transport rollers 25 closest to the insertion slot 22. The sensor 33 is used to detect that the card 21 inserted into the main body has reached a storage unit (not shown) that temporarily holds the card 21. The sensors 31 and 32 are for detecting the position of the card 21 being conveyed through the card conveyance path 4. Based on the detection results of the insertion detection sensor 23 and the sensors 30 to 33, whether the card 21 is inserted in the main body and the position of the card 21 in the transport path are detected. In addition, since the arrangement interval between the magnetic head 29 and the sensor 33 is slightly longer than the length of the card 21 in the transport direction, the sensor 33 detects the leading end of the card 21 when the card 21 reaches the storage section. When the position is reached, the magnetic data reading unit 3 has finished reading the magnetic data recorded on the card 21.

  In addition, a foreign matter detection sensor 36 is provided on the front surface of the magnetic reading device 1, and when a foreign matter is installed in front of the insertion port 22, a signal (detection signal) indicating that the foreign matter has been detected is sent to the control unit 2. Output.

  A core 34 is installed on the front surface of the magnetic reading apparatus 1 so as to surround the periphery of the insertion slot 22. The left part of FIG. 2A is a diagram illustrating a state in which the core 34 surrounds the periphery of the insertion port 22. The insertion opening 22 is provided with a loop antenna 35 (an antenna in which a conductor is wound once or a plurality of times in a loop shape) so as to surround the periphery thereof. The material of the core 34 is a material having a high magnetic permeability such as ferrite. FIG. 2B is a diagram showing the positional relationship between the insertion slot 22 and the core 34. As shown in FIG. 2B, the core 34 surrounds the insertion opening 22 and covers the back of the loop antenna 35 (on the magnetic head 29 side of the magnetic reading device 1). The loop antenna 35 is provided so as to surround the core 34. When a drive signal is applied from both ends of the loop antenna 35 from the magnetic field controller 9, the loop antenna 35 generates a magnetic field around the insertion opening 22. This magnetic field prevents the magnetic information of the magnetic card 21 from being stolen by the unauthorized magnetic information reader attached to the front surface of the insertion slot 22.

  The core 34 is arranged in an L-shaped (or inverted L-shaped) shape as shown in FIG. 2A, and absorbs a magnetic field radiated from the loop antenna 35 toward the inside of the magnetic reader 1. Radiates to the insertion port 22 side. Accordingly, the provision of the core 34 can suppress the influence of the magnetic field radiated from the loop antenna 35 on the inside of the magnetic reading apparatus 1. That is, since the influence of the magnetic field on the card 21 and the magnetic head 29 inserted through the insertion port 22 and conveyed on the conveyance path can be suppressed, the magnetic head 29 can read the magnetic information of the card 21 without being influenced by the magnetic field. Can be read.

  Further, since the core 34 is arranged in the shape described above, the magnetic field radiated to the front side of the insertion port 22 can be increased. Further, by permanently providing such a core 34, it is possible to always generate a magnetic field on the front side of the insertion port 22, as shown in FIG. Further, as will be described later, since the magnetic field radiated from the loop antenna 35 can be changed and increased, the current flowing through the loop antenna 35 can be reduced, and the power consumed by the main body of the magnetic reader 1 can be suppressed. be able to.

  In the following description, the loop antenna 35 is disposed so as to surround the core 34. However, as shown in FIG. 2C, the loop antenna 35 is located above and below the insertion slot 22 (or symmetrical positions such as left and right). It is good also as arranging. In this case, a plurality of magnetic field generators 8 are provided in accordance with the number of loop antennas 35, and a magnetic field larger than that in the case where the loop antennas 35 are arranged so as to surround the core 34 is generated. Can be disturbed. Furthermore, in the case shown in FIG. 2C, the magnetic field control unit 9 may be set so as to generate magnetic fields having different frequencies from the plurality of magnetic field generation units 8. In this case, a magnetic field having a low frequency reduces energy lost due to iron loss, and can more effectively interfere with an illegal magnetic reader.

  Next, the operation of the magnetic reading apparatus 1 according to the present embodiment will be described. FIG. 3A is a flowchart showing a processing procedure of an initial operation after the magnetic reader 1 is powered on. After the power is turned on, the magnetic field controller 9 of the magnetic reading device 1 drives the magnetic field generator 8 to generate a magnetic field around the insertion port 22 (step S1). Further, the foreign matter detection control unit 11 of the magnetic reading device 1 drives the foreign matter detection sensor 36 (step S2), and starts the foreign matter detection process.

  FIG. 3B is a flowchart showing a processing procedure for foreign object detection processing. As shown in FIG. 3B, in the foreign object detection process, first, the foreign object detection control unit 11 determines whether or not the foreign object detection sensor 36 has detected a foreign object (step S31). When the foreign object detection control unit 11 determines that the foreign object detection sensor 36 has detected a foreign object (step S31; Yes), the magnetic field control unit 9 loops over the magnetic field generation unit 8 as shown in FIG. Control is performed to increase the current flowing through the antenna 35, and the generated magnetic field is increased (step S32). On the other hand, when the foreign matter detection control unit 11 determines that the foreign matter detection sensor 36 has not detected the foreign matter (step S31; No), the foreign matter detection control unit 11 stands by as it is.

  Thereafter, the foreign object detection control unit 11 determines whether or not the foreign object detection sensor 36 has detected the foreign object (step S33), and determines that the foreign object detection sensor 36 has detected no foreign object (step S33; No). The magnetic field control unit 9 controls the magnetic field generation unit 8 so as to restore the current flowing through the loop antenna 35 (step S34), and ends the process. When it is determined that the foreign object detection sensor 36 detects a foreign object (step S33; Yes), the magnetic field control unit 9 maintains the magnitude of the current flowing through the loop antenna 35. When step S34 is completed, all the processes shown in FIGS. 3A and 3B are completed.

  In the example shown in FIG. 6, the magnetic field generator 8 increases the drive current so that the drive current value P2 is larger than the drive current value P1 before the foreign object detection sensor 36 detects the foreign object, and then detects the foreign object. When the sensor 36 no longer detects the foreign object, the magnetic field generator 8 reduces the drive current so that the original drive current value P1 before the foreign object detection sensor 36 detects the foreign object is obtained. As described above, even when an illegal magnetic reader (for example, a magnetic foreign object) is placed in front of the insertion port 22 by increasing the magnetic field when the foreign object detection sensor 36 detects a foreign object, Unauthorized acts such as skimming on the magnetic reader 1 by the unauthorized magnetic reader can be prevented.

  FIG. 4 is a flowchart showing a processing procedure when the magnetic reading device 1 according to the present embodiment performs the taking-in operation or the reading operation of the card 21. Hereinafter, although it demonstrates along this flowchart, in the magnetic reader 1, suppose that the card | curd 21 is not detected by the insertion detection sensor 23 and the sensors 30-33. Further, it is assumed that the magnetic field generation unit 8 passes a driving current through the loop antenna 35 and radiates a magnetic field from the loop antenna 35.

  As shown in FIG. 4, the control unit 2 determines whether or not the insertion detection sensor 23 has detected the card 21 (step S41), and determines that the insertion detection sensor 23 has detected the card 21 (step S41; Yes), it determines with the card | curd 21 having been inserted, and the card | curd conveyance control part 40 starts rotation of the conveyance rollers 25-28 (step S42). On the other hand, if the control part 2 determines with the insertion detection sensor 23 not detecting the card | curd 21 (step S41; No), it will wait as it is.

  In the process of step S42 described above, the transport rollers 25 to 28 rotate in a direction in which the inserted card 21 is taken into the main body (hereinafter referred to as a positive direction). Thereafter, the card transport control unit 40 transports the card 21 to the storage unit at a constant speed. When the card transport control unit 40 transports the card 21 to the storage unit, the magnetic head 29 comes into contact with the magnetic stripe of the card 21, and the magnetic information reading unit 3 reads the magnetic data recorded on the card 21. Read (step S43).

  The controller 2 determines whether or not the sensor 33 arranged next to the conveyance roller 28 has detected the card 21 (step S44), and the sensor 33 arranged next to the conveyance roller 28 has detected the card 21. (Step S44; Yes), it is determined that the conveyed card 21 has reached the rear end, and the card conveyance control unit 40 stops the rotation of the conveyance roller (Step S45). On the other hand, if it is determined that the sensor 33 arranged next to the transport roller 28 has not detected the card 21 (step S44; No), the process waits as it is. When step S45 ends, all the processes shown in FIG. 4 end.

  Next, an operation (card return operation) for returning the card 21 stored in the storage unit to the user will be described. FIG. 5 is a flowchart showing a processing procedure when the magnetic reading device 1 according to the present embodiment performs the return operation of the card 21.

  First, the card conveyance control unit 40 starts rotation of the conveyance rollers 25 to 28 (step S51). In step S51, the card transport control unit 40 rotates the transport rollers 25 to 28 in a direction (hereinafter referred to as a reverse direction) in which the card 21 is transported from the storage unit to the insertion port 22, and the card 21 is at a constant speed. It is conveyed to the insertion port 22. Also at this time, the magnetic field controller 9 controls the magnetic field generator 8 to emit a disturbing magnetic field from the loop antenna 35. The controller 2 determines whether or not the sensor 30 disposed next to the transport roller 25 has detected the rear end of the card 21 (step S52).

  And when the control part 2 determines with the sensor 30 arrange | positioned next to the conveyance roller 25 having detected the rear end of the card | curd 21 (step S52; Yes), the card conveyance control part 40 is rotated in the reverse direction. The rotation of the conveying rollers 25 to 28 is stopped (step S53). On the other hand, when the control unit 2 determines that the sensor 30 disposed next to the transport roller 25 has not detected the rear end of the card 21 (step S52; No), the control unit 2 stands by. Here, since the front end and the rear end of the card 21 are described based on the conveyance direction of the card 21, the rear end of the card 21 during the above-described card 21 taking-in operation and reading operation is the card 21. It is the tip of the card 21 at the time of return.

  The control unit 2 determines whether or not the state in which the sensor 30 detects the card 21 has changed to a state in which the card 21 is not detected (step S53), and the state in which the sensor 30 detects the card 21 The card conveyance control unit 40 stops the conveyance rollers 25 to 28 when it is determined that the card 21 has not been detected, that is, the sensor 30 has detected that the rear end of the card 21 has been detected (step S53; Yes). Thus, the conveyance of the card 21 is stopped (step S54). On the other hand, when it determines with the sensor 30 not detecting the rear end of the card | curd 21 (step S53; No), the control part 2 waits as it is. In these processes, the card 21 is sandwiched between the transport rollers 25, and the tip portion of the card 21 projects outward from the insertion port 22. Therefore, the user can grasp and remove the tip portion of the card 21 protruding from the insertion slot 22.

  The control unit 2 determines whether or not the state in which the insertion detection sensor 23 detects the card 21 has changed to a state in which the card 21 is not detected (step S55), and the insertion detection sensor 23 detects the card 21. When it is determined that the card 21 has not been detected from the current state, that is, it is determined that the card 21 has been removed (step S55; Yes), the control unit 2 ends the process. On the other hand, when it determines with the card | curd 21 not having been extracted (step S55; No), the control part 2 waits as it is. When the process of step S55 is finished, all the processes shown in FIG. 5 are finished.

  In the embodiment described above, the magnetic field generated in the loop antenna 35 is changed by increasing the value of the current passed through the loop antenna 35. However, when the foreign object detection unit 9 detects a foreign object, the magnetic field The frequency of the drive current generated by the control unit 9 may be changed.

  FIG. 7 is a diagram illustrating how the magnetic field control unit 9 changes the frequency when the foreign object detection unit 10 detects a foreign object. As shown in FIG. 7, when the foreign object detection unit 10 detects a foreign object, the magnetic field control unit 9 sets the frequency value of the drive current to the loop antenna 35 to F1 lower than F2 to F2. Thus, by setting the frequency value of the drive current to F1 which is lower than F2 to F2, the frequency of the magnetic field generated from the loop antenna 35 is lowered. Therefore, when the foreign material placed in front of the insertion port 22 is a magnetic body, the energy lost due to iron loss is reduced, and skimming of the magnetic reading device 1 by the illegal magnetic reader installed in front of the insertion port 22 is reduced. It is possible to prevent illegal acts such as

  In the above embodiment, the foreign object detection sensor 36 is provided, but an ammeter 12 for measuring the current value of the loop antenna 35 may be installed instead. FIG. 8 is a block diagram showing the configuration of the main part of the magnetic reading apparatus 1 in which the ammeter 12 is installed. By measuring the current value flowing through the loop antenna 35 with the ammeter 12, it is detected that a foreign matter having a high magnetic permeability such as an iron plate or ferrite is attached to the front surface of the loop antenna 35. When a foreign substance having a high magnetic permeability is attached, the inductance of the loop antenna 35 changes. As a result, the current value changes compared to a case where a foreign matter having high magnetic permeability is not attached. In this case, the magnetic field controller 9 determines whether or not the measured current value is within a predetermined range, and if it is determined that the measured current value is not within the predetermined range, The magnetic field controller 9 determines that a foreign object has been attached, and increases the drive current to increase the magnetic field generated from the loop antenna 35.

  Further, in the above-described embodiment, the core 34 is used to prevent the magnetic head 29 from reading the magnetic information on the card 21. However, the core 34 may not be installed. When the core 34 as shown in FIG. 2A is not installed, the magnetic field from the loop antenna 35 cannot be physically prevented from being radiated to the magnetic head 29 side. However, the magnetic head 29 performs the reading operation of the card 21 by the magnetic field radiated from the loop antenna 35 by changing the magnetic field generated by the magnetic field control unit 9 when the card 21 is taken in or read out. It is possible to prevent the influence of the situation.

  FIG. 9 is a flowchart showing the processing procedure of the taking-in operation and the reading operation of the card 21 when the core 34 is not installed. Hereinafter, although it demonstrates along this flowchart, the magnetic reader 1 assumes that the card | curd 21 is not detected in the insertion detection sensor 23 and the sensors 30-33. Further, it is assumed that the magnetic field generation unit 8 passes a driving current through the loop antenna 35 and radiates a magnetic field from the loop antenna 35.

  As shown in FIG. 9, the control unit 2 determines whether or not the insertion detection sensor 23 has detected the card 21 (step S91). And when the control part 2 determines with the insertion detection sensor 23 having detected the card | curd 21 (step S91; Yes), it determines with the card | curd 21 having been inserted and the card | curd conveyance control part 40 has the conveyance rollers 25-28. Control is performed to start rotation in the positive direction (step S92). Thereafter, the card transport control unit 40 transports the card 21 to the storage unit at a constant speed, and passes over the sensors 30 to 33 when the card transport control unit 40 transports the card 21 to the storage unit.

  The control unit 2 determines whether or not the sensor 31 installed on the side closer to the insertion port 22 than the magnetic head 29 has detected the card 21 (step S93), and is installed on the side closer to the insertion port 22 than the magnetic head 29. When it is determined that the detected sensor 31 has detected the card 21 (step S93; Yes), the drive signal to the loop antenna 35 is stopped and the generation of the magnetic field is stopped (step S94). Since the distance between the sensor 31 and the insertion slot 22 is longer than that of the card 21, even if the generation of the magnetic field is stopped, the magnetic information is not read by the illegal magnetic reader installed in front of the insertion slot 22. On the other hand, when it is determined that the sensor 31 installed on the side closer to the insertion port 22 than the magnetic head 29 has not detected the card 21 (step S93; No), the process stands by.

  Thereafter, the magnetic head 29 comes into contact with the magnetic stripe of the card 21 and the magnetic information reading unit 3 reads the magnetic data recorded on the card 21 (step S95). The control unit 2 determines whether or not the sensor 33 arranged next to the conveyance roller 28 has detected the card 21 (step S96), and determines that the sensor 33 has detected the card 21 (step S96; Yes). ), It is determined that the card 21 has reached the rear end, and the card transport control unit 40 stops the rotation of the transport roller (step S97). Thereafter, the magnetic field generator 8 applies a drive signal to the loop antenna 35 in accordance with an instruction from the controller 2, and the loop antenna 35 generates a magnetic field again (step S98). The card return operation is the same as the flowchart shown in FIG.

  FIG. 10B is a timing chart of magnetic field generation when the process of the flowchart shown in FIG. 9 is performed. As shown in FIG. 10B, when the sensor 31 detects the leading edge of the card 21, the magnetic field control unit 9 stops the magnetic field generated from the loop antenna 35, and then the sensor 33 detects the trailing edge of the card 21. When detected, the magnetic field controller 9 again generates a magnetic field from the loop antenna 35. As described above, even when the core 34 is not installed, the loop antenna 35 is used only while the magnetic head 29 reads the magnetic data of the card 21 (while the card 21 is detected by the sensor 31 and the sensor 33). Since the generated magnetic field is stopped, fraudulent acts such as skimming on the magnetic reader 1 by the illegal magnetic reader when the card 21 is inserted or the card 21 is ejected can be prevented.

  In this way, the foreign matter detection unit 10 detects whether or not there is an illegal magnetic reader near the insertion slot 22 where the card 21 is inserted or ejected, and a magnetic field emitted from the illegal magnetic reader near the insertion slot 22. The magnetic field generation unit 8 that generates a disturbing magnetic field for preventing the magnetic field and the magnetic field control unit 9 determine whether or not the foreign matter detection unit 10 has detected the illegal magnetic reader, and the foreign matter detection unit 10 uses the illegal magnetic reader. When it is determined that the detection has been detected, the intensity of the disturbing magnetic field generated by the magnetic field generation unit 8 is displaced. Therefore, even if the illegal magnetic reader is installed so as to block the magnetic field, the illegal magnetic reader This prevents the magnetic data recorded on the magnetic recording medium from being stolen.

  For example, even when an illegal magnetic reader that cuts off the magnetic field using a magnetic plate is installed around the magnetic reader, the foreign matter detector 10 detects the illegal magnetic reader and the magnetic field generator 8 Since the magnetic field to be generated is increased, the illegal magnetic reader can be disturbed. Also, since the magnetic field is greatly displaced at the timing when the foreign matter detection unit 10 detects the illegal magnetic reader, the card is detected by the illegal magnetic reader after the card 21 is inserted until the insertion of the card 21 is detected. 21 magnetic data is not stolen.

  Further, as shown in FIG. 2C, a plurality of magnetic field generation units 8 are provided, and when the foreign object detection unit 10 detects a foreign object such as an improper time reading device, a magnetic field is generated from each of the plurality of magnetic field generation units. Even if the illegal magnetic reader as described above is installed, the foreign matter detector 10 detects the illegal magnetic reader and generates a magnetic field from the plurality of magnetic field generators 8. The generated magnetic field can be increased to interfere with the illegal magnetic reader.

  Further, since the magnetic field control unit 9 displaces the frequency of the generated magnetic field when the foreign material detection unit 10 detects the foreign material, the magnetic field control unit 9 loses due to iron loss when an illegal magnetic reader as described above is installed. The frequency can be displaced so that the energy that is generated can be reduced, thereby interfering with the illegal magnetic reader.

  Furthermore, since the frequencies of the magnetic fields generated from the plurality of magnetic field generators 8 are set to be different from each other, for example, when a fraudulent magnetic reader that cuts off the magnetic field using a magnetic plate is installed, the frequency of A low magnetic field reduces the energy lost due to iron loss and can interfere with unauthorized magnetic readers.

  Also, since the magnetic field generator 8 generates a magnetic field only when the foreign object detector 10 detects a foreign object, the magnetic information recorded on the card 21 can be stolen when the unauthorized magnetic reader is installed. Can be disturbed. In addition, when no illegal magnetic reader is installed, no magnetic field is generated, and power is not wasted.

  In the above-described embodiment, the foreign matter detection unit 10 detects an illegal magnetic reader, and the magnetic field control unit 9 controls the magnitude of the magnetic field generated by the magnetic field generation unit 8. For example, a customer detection sensor When 50 detects a user by infrared rays or the like, the magnetic field controller 9 may be displaced so as to increase the magnetic field generated by the magnetic field generator 8. In this case, it is possible to prevent the fraudulent magnetic information from being stolen by the unauthorized magnetic reader when the user brings the card 21 close to the magnetic reader 1 (before insertion into the magnetic reader 1).

  It should be noted that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

DESCRIPTION OF SYMBOLS 1 ... Magnetic reader 2 ... Control part (CPU)
DESCRIPTION OF SYMBOLS 3 ... Magnetic information reading part 4 ... Card conveyance path 5 ... Card position sensor 6 ... Memory 7 ... Host interface 8 ... Magnetic field generation part 9 ... Magnetic field control part 10 ... Foreign object detection part 11 ... Foreign object detection control part 12 ... Ammeter 21 ... Magnetic card 22 ... Card insertion slot 23 ... Card insertion detection sensor 24 ... Card insertion slot unit 29 ... Magnetic head 34 ... Magnetic cores 35, 35a, 35b ... Loop antenna 36 ... Foreign matter detection sensor 40 ... Card transport control unit 50 ... Customer Detection sensor.

Claims (6)

A foreign object detector for detecting whether there is a foreign object near the card insertion slot for inserting or ejecting the magnetic card;
Near the card insertion slot, a magnetic field generator for generating a disturbing magnetic field for preventing a magnetic field emitted from the foreign matter,
It is determined whether the foreign object detection unit has detected the foreign object, and when the foreign object detection unit determines that the foreign object has been detected, the intensity of the disturbing magnetic field generated by the magnetic field generation unit is displaced. A control unit;
A magnetic reading apparatus comprising: A plurality of the magnetic field generation units are provided near the card insertion slot,
The control unit displaces the intensity of the disturbing magnetic field generated by each magnetic field generation unit when the foreign object detection unit detects the foreign object,
The magnetic reader according to claim 1. When the control unit determines that the foreign matter detection unit has detected the foreign matter, the control unit displaces the strength of the magnetic field so as to increase the strength of the disturbing magnetic field generated by the magnetic field generation unit.
The magnetic reader according to claim 1, wherein the magnetic reader is a magnetic reader. When the control unit determines that the foreign object detection unit has detected the foreign object, the control unit displaces the frequency of the disturbing magnetic field generated by the magnetic field generation unit.
The magnetic reading device according to claim 1, wherein the magnetic reading device is a magnetic reading device. A member is provided that absorbs the magnetic field emitted from the disturbing magnetic field generated by the magnetic field generator toward the inside of the magnetic reader;
The magnetic reading device according to claim 1, wherein the magnetic reading device is a magnetic reading device. A detection unit for detecting a user;
The control unit displaces the intensity of the disturbing magnetic field generated by the magnetic field generation unit when the detection unit detects the user.
The magnetic reading device according to claim 1, wherein the magnetic reading device is a magnetic reading device.

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