WO2013030876A1 - Device for reading magnetic recording medium - Google Patents

Device for reading magnetic recording medium Download PDF

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Publication number
WO2013030876A1
WO2013030876A1 PCT/JP2011/004826 JP2011004826W WO2013030876A1 WO 2013030876 A1 WO2013030876 A1 WO 2013030876A1 JP 2011004826 W JP2011004826 W JP 2011004826W WO 2013030876 A1 WO2013030876 A1 WO 2013030876A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
magnetic field
recording medium
disturbing
card
Prior art date
Application number
PCT/JP2011/004826
Other languages
French (fr)
Japanese (ja)
Inventor
明博 忠政
弘之 鈴木
智哉 木村
Original Assignee
日立オムロンターミナルソリューションズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日立オムロンターミナルソリューションズ株式会社 filed Critical 日立オムロンターミナルソリューションズ株式会社
Priority to PCT/JP2011/004826 priority Critical patent/WO2013030876A1/en
Priority to JP2013530867A priority patent/JP5695204B2/en
Priority to CN201180072818.9A priority patent/CN103733232B/en
Publication of WO2013030876A1 publication Critical patent/WO2013030876A1/en

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F19/00—Complete banking systems; Coded card-freed arrangements adapted for dispensing or receiving monies or the like and posting such transactions to existing accounts, e.g. automatic teller machines
    • G07F19/20—Automatic teller machines [ATMs]
    • G07F19/205—Housing aspects of ATMs
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
    • G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
    • G06K7/083—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F19/00—Complete banking systems; Coded card-freed arrangements adapted for dispensing or receiving monies or the like and posting such transactions to existing accounts, e.g. automatic teller machines
    • G07F19/20—Automatic teller machines [ATMs]
    • G07F19/205—Housing aspects of ATMs
    • G07F19/2055—Anti-skimming aspects at ATMs
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G07F7/0873—Details of the card reader

Definitions

  • the present invention relates to an apparatus for reading data recorded on a magnetic recording medium, and more particularly to a magnetic recording medium reading apparatus having a function of preventing unauthorized acquisition of data.
  • Transaction processing devices such as ATM (Automated Teller Machine) and CD (Cash Dispenser) are equipped with a card reader that reads magnetic cards.
  • ATM Automated Teller Machine
  • CD Credit Dispenser
  • a card reader that reads magnetic cards.
  • skimming that illegally obtains data recorded on the magnetic stripe of the card has occurred.
  • an unauthorized reading device equipped with a magnetic head is installed in the vicinity of the card insertion slot of a card reader provided in an ATM or CD, and is inserted into the card reader by the magnetic head of this unauthorized reading device.
  • Patent Document 1 listed below describes a card reader in which a disturbing magnetic field generator is provided in the vicinity of a card insertion slot.
  • a disturbing magnetic field generator generates a disturbing magnetic field in the outer region of the card insertion slot. For this reason, even if an unauthorized reading device is attached to the outside of the card insertion slot, the data read by the device is affected by the disturbing magnetic field and becomes different from the original data recorded on the card. Thereby, it is possible to prevent the card data from being illegally acquired.
  • Patent Document 2 described later describes a card reader in which a loop antenna for generating a disturbing magnetic field is provided around a card insertion slot.
  • the antenna surface of the loop antenna is parallel to the front surface of the card insertion slot.
  • a disturbing magnetic field is generated in the outer area of the card insertion slot, it is possible to prevent illegal acquisition of card data even if an unauthorized reading device is attached to the outside of the card insertion slot. Can do.
  • FIG. 19 shows an example of a card reader equipped with a disturbing magnetic field generator.
  • a card insertion slot unit 24 is provided on the front surface of the housing 100 of the card reader 1.
  • the card insertion slot unit 24 is formed with an insertion slot 22 into which the magnetic card 21 is inserted.
  • a disturbing magnetic field generator 35 is provided in the vicinity of the insertion port 22.
  • a magnetic head 29 that reads data from the magnetic card 21 is provided inside the housing 100.
  • the card reader 1 is disposed inside the panel 200 of the transaction processing apparatus.
  • the disturbing magnetic field generated by the disturbing magnetic field generator 35 acts on the unauthorized reading device 300 attached to the front surface of the panel 200, and prevents data from being illegally acquired from the magnetic card 21 inserted in the A direction.
  • JP 2001-67524 A Japanese Patent No. 4425674
  • the stronger the intensity of the disturbing magnetic field is, the stronger the intensity of the magnetic field generated on the rear side of the disturbing magnetic field generator 35 is to prevent skimming in the unauthorized reading device 300.
  • a disturbing magnetic field is applied to the magnetic head 29 in the housing 100, and there is a problem that the data reading performance is deteriorated.
  • an object of the present invention is to provide a magnetic recording medium in which the reading performance of data is not deteriorated by preventing a disturbing magnetic field from reaching the magnetic head while causing a strong disturbing magnetic field to act on the unauthorized reading device. To provide a reader.
  • a magnetic recording medium reading apparatus includes an insertion slot into which a magnetic recording medium is inserted, a conveying means for conveying the magnetic recording medium inserted from the insertion opening, and a magnetic recording medium conveyed by the conveying means.
  • a magnetic head that reads data; and a magnetic field generator that generates a disturbing magnetic field that prevents reading of data on a magnetic recording medium by an unauthorized reading device that is provided in the vicinity of the insertion slot and is attached in front of the insertion slot.
  • a magnetic body or a loop antenna is provided for unevenly distributing the disturbing magnetic field generated from the magnetic field generator so as not to reach the magnetic head.
  • the disturbing magnetic field generated from the magnetic field generator is unevenly distributed due to the action of the magnetic body and the loop antenna, so that the disturbing magnetic field does not reach the magnetic head. For this reason, the magnetic head can read the data on the magnetic recording medium without being affected by the disturbing magnetic field, and the data reading performance is prevented from deteriorating.
  • a magnetic body may be provided in front of the magnetic field generation unit, and the disturbing magnetic field generated from the magnetic field generation unit may be unevenly distributed forward through the magnetic body.
  • a loop antenna is provided in front of the magnetic field generating unit, and the disturbing magnetic field is unevenly distributed forward by further generating a disturbing magnetic field in the loop antenna by electromagnetic induction based on the disturbing magnetic field generated from the magnetic field generating unit. May be.
  • a loop antenna is provided in front of the magnetic field generator, and the disturbing magnetic field is unevenly distributed forward by further generating a disturbing magnetic field in the loop antenna by magnetic resonance based on the disturbing magnetic field generated from the magnetic field generator. May be.
  • a magnetic material may be inserted into the loop antenna.
  • the frequency of the disturbing magnetic field generated by the loop antenna may be lower than the frequency of the disturbing magnetic field generated by the magnetic field generating unit.
  • a magnetic material may be provided behind the magnetic field generator, and this magnetic material may be disposed in the vicinity of the magnetic head.
  • the magnetic body may constitute a part of a roller provided to face the magnetic head.
  • the magnetic body may be disposed on one side or both sides of the magnetic head so as to face the magnetic head.
  • the magnetic body may be provided in front of and behind the magnetic field generator.
  • the loop antenna may be provided in front of the magnetic field generator and the magnetic body may be provided behind the magnetic field generator.
  • the disturbing magnetic field does not reach the magnetic head, and therefore a magnetic recording medium reading device in which the data reading performance is not deteriorated can be provided.
  • FIG. 1 is a block diagram showing an electrical configuration of a card reader according to an embodiment of the present invention.
  • FIG. 2 is a side sectional view and a front view of the card reader according to the first embodiment.
  • FIG. 3 is a plan view of the magnetic card.
  • FIG. 4 is a diagram showing the distribution of the disturbing magnetic field in the first embodiment.
  • FIG. 5 is a waveform diagram for explaining the detection of the magnetic stripe.
  • FIG. 6 is a side sectional view of the card reader according to the second embodiment.
  • FIG. 7 is a diagram showing the distribution of the disturbing magnetic field in the second embodiment.
  • FIG. 8 is a diagram showing the distribution of the disturbing magnetic field in the third embodiment.
  • FIG. 9 is a circuit diagram for explaining magnetic resonance.
  • FIG. 1 is a block diagram showing an electrical configuration of a card reader according to an embodiment of the present invention.
  • FIG. 2 is a side sectional view and a front view of the card reader according to the first embodiment.
  • FIG. 3 is
  • FIG. 10 is a side sectional view of the card reader according to the fourth embodiment.
  • FIG. 11 is a diagram showing the distribution of the disturbing magnetic field in the fourth embodiment.
  • FIG. 12 is a side sectional view of a card reader and a side sectional view of a roller according to a fifth embodiment.
  • FIG. 13 is a diagram showing the distribution of the disturbing magnetic field in the fifth embodiment.
  • FIG. 14 is an enlarged view of the main part showing the distribution of the disturbing magnetic field in the sixth embodiment.
  • FIG. 15 is a side sectional view of the card reader according to the seventh embodiment.
  • FIG. 16 is a side sectional view of the card reader according to the eighth embodiment.
  • FIG. 17 is a side sectional view of the card reader according to the ninth embodiment.
  • FIG. 18 is a side sectional view of the card reader according to the tenth embodiment.
  • FIG. 19 is a side sectional view of a conventional card reader.
  • the card reader 1 includes a control unit 2 composed of a CPU that controls the operation of the entire apparatus, a magnetic information reading unit 3 that reads magnetic data recorded on a magnetic card, and a magnetic A card transport unit 4 that transports a card, a card detection sensor 5 that detects a magnetic card, a memory 6 that stores magnetic data read by the magnetic information reading unit 3, and a connection unit between a host device (for example, ATM).
  • the host interface 7 includes a magnetic stripe detector 10 that detects a magnetic stripe of the magnetic card, and a magnetic field generator 8 that generates a disturbing magnetic field for preventing reading of data recorded on the magnetic stripe.
  • the control unit 2 includes a magnetic field control unit 9 that controls the magnetic field generation unit 8 and a card conveyance control unit 12 that controls the card conveyance unit 4.
  • the magnetic stripe detection unit 10 and the magnetic field generation unit 8 are installed in the card insertion slot unit 24.
  • the magnetic stripe detection unit 10 includes a magnetic head 34 (FIG. 2) described later.
  • a card insertion slot unit 24 is provided on the front surface of the casing 100 of the card reader 1.
  • the card insertion slot unit 24 is formed with an insertion slot 22 into which a magnetic card (hereinafter simply referred to as “card”) 21 is inserted.
  • the card 21 has a magnetic stripe 21a.
  • FIG. 3 is a view of the card 21 as seen from the back side.
  • a card insertion detection sensor 23 that detects the inserted card 21, a magnetic head 34 that detects the magnetic stripe 21 a of the card 21, and a magnetic field generator 8 that generates a disturbing magnetic field are provided. ing.
  • the magnetic field generator 8 includes, for example, an iron core and a coil wound around the iron core. As can be seen from FIG. 2B, the magnetic field generator 8 is provided on the magnetic head 34 side for magnetic stripe detection toward the insertion slot 22.
  • transport rollers 25 to 28, card position detection sensors 30 to 33, and a magnetic head 29 are provided inside the casing 100 of the card reader 1.
  • a pair of transport rollers 25 to 28 is provided across the transport path P, and the card 21 is sandwiched and transported by the pair of rollers.
  • These transport rollers 25 to 28 are connected to a motor (not shown) via a transport belt (not shown).
  • a motor not shown
  • a transport belt not shown
  • the card transport unit 4 is an example of the “transport means” in the present invention.
  • the card position detection sensors 30 to 33 are transmissive optical sensors, each having a light emitting part and a light receiving part that are opposed to each other with the conveyance path P interposed therebetween.
  • the arrangement interval of these sensors 30 to 33 is shorter than the length of the magnetic card 21 in the transport direction.
  • the sensor 30 detects that the card 21 is sandwiched between the transport rollers 25 closest to the insertion port 22.
  • the sensor 33 detects that the inserted card 21 has reached a storage part (not shown) that temporarily stores the card.
  • the sensors 31 and 32 detect the position of the card 21 being conveyed.
  • These card position detection sensors 30 to 33 together with the card insertion detection sensor 23 constitute a card detection sensor 5 (FIG. 1).
  • the magnetic head 29 is provided below the conveyance path P between the conveyance roller 26 and the conveyance roller 27.
  • the magnetic head 29 reads data recorded on the magnetic stripe 21 a of the card 21 in the process in which the inserted card 21 is transported along the transport path P.
  • the magnetic head 34 is a magnetic head for detecting the presence / absence of data recorded on the magnetic stripe
  • the magnetic head 29 is a magnetic head for reproducing the data itself recorded on the magnetic stripe. Head.
  • the distance between the magnetic head 29 and the sensor 33 is slightly longer than the length of the card 21 in the transport direction. Therefore, when the card 21 reaches the storage unit, that is, when the tip of the card 21 reaches the position of the sensor 33, the magnetic head 29 has completed reading of data recorded on the card 21. .
  • the card reader 1 is disposed inside the panel 200 of the transaction processing apparatus.
  • the card 21 inserted in the A direction from the opening of the panel 200 is guided to the insertion port 22 of the card reader 1.
  • a magnetic body 36 made of a material having high magnetic permeability such as ferrite or iron is disposed between the panel 200 and the card insertion slot unit 24 in front of the magnetic field generator 8.
  • the magnetic body 36 is attached to a support member (not shown) provided on the panel 200, for example.
  • the card reader 1 and the magnetic body 36 constitute a magnetic recording medium reading device of the present invention.
  • the magnetic field generator 8 When a drive current flows through the magnetic field generator 8 based on the control of the magnetic field controller 9 (FIG. 1), the magnetic field generator 8 generates a disturbing magnetic field.
  • the magnetic field generator 8 always generates a disturbing magnetic field by continuously supplying a drive current to the magnetic field generator 8.
  • the disturbing magnetic field generated by the magnetic field generation unit 8 is guided to the magnetic body 36 serving as a kind of waveguide, extends forward (X direction), and acts on the unauthorized reading device 300. Therefore, the data read by the unauthorized reading device 300 is different from the original data recorded on the card 21 due to the influence of the disturbing magnetic field. Thereby, it is possible to prevent the data of the card 21 from being illegally acquired.
  • the disturbing magnetic field generated by the magnetic field generator 8 is also present behind the magnetic field generator 8 (Y direction).
  • the disturbing magnetic field does not extend backward through the magnetic material. Therefore, the disturbing magnetic field does not reach the magnetic data reading magnetic head 29, and the magnetic head 29 can read the data of the card 21 without being affected by the disturbing magnetic field.
  • the disturbing magnetic field generated in the magnetic field generator 8 is unevenly distributed forward via the magnetic body 36. Become.
  • the intensity of the disturbing magnetic field is strong at the front and weak at the rear. Therefore, by applying a strong disturbing magnetic field to the unauthorized reading device 300 attached to the front surface of the panel 200, skimming can be surely prevented, and against the magnetic head 29 in the card reader 1. Therefore, it is possible to prevent the data reading performance from deteriorating by preventing the disturbing magnetic field from reaching.
  • the disturbing magnetic field generated by the magnetic field generator 8 also acts on the magnetic head 34 for detecting the magnetic stripe. For this reason, even when an unauthorized reading device is connected to the magnetic head 34 via a lead wire, it is possible to prevent data from being illegally acquired. Even if the disturbing magnetic field always acts on the magnetic head 34, the magnetic head 34 does not need to reproduce the magnetic data itself. For example, the fact that the detection signal pattern is different before and after the detection of the magnetic stripe 21a is used. Thus, the magnetic stripe 21a can be detected. This will be described with reference to FIG.
  • FIG. 5A shows the waveform of the drive current flowing through the magnetic field generator 8. A disturbing magnetic field corresponding to this drive current is generated from the magnetic field generator 8.
  • FIG. 5B shows a waveform of a detection signal output from the magnetic head 34 when there is no disturbing magnetic field.
  • FIG. 5C shows a waveform of a detection signal output from the magnetic head 34 when a disturbing magnetic field exists, and is a waveform obtained by synthesizing FIG. 5A and FIG. 5B.
  • the pattern of the detection signal is different before and after the time t when the magnetic stripe is detected. Therefore, the magnetic stripe can be detected by the change of the pattern.
  • FIG. 6 shows a card reader according to the second embodiment.
  • the magnetic body 36 is provided in front of the magnetic field generator 8.
  • a loop antenna 37 is provided in front of the magnetic field generator 8.
  • the loop antenna 37 is also attached to a support member (not shown) provided on the panel 200.
  • the card reader 1 and the loop antenna 37 constitute a magnetic recording medium reading device of the present invention. Since other configurations are the same as those in FIG. 2, description of overlapping portions is omitted.
  • the disturbing magnetic field is always generated from the magnetic field generator 8.
  • the disturbing magnetic field (primary disturbing magnetic field) generated by the magnetic field generator 8 is linked to the loop antenna 37 as indicated by a broken line in FIG.
  • an interference magnetic field (secondary interference magnetic field) as shown by a one-dot chain line is generated by electromagnetic induction.
  • the primary disturbing magnetic field does not reach the unauthorized reading device 300
  • the secondary disturbing magnetic field acts on the unauthorized reading device 300.
  • the data read by the unauthorized reading device 300 is different from the original data recorded on the card 21 due to the influence of the secondary disturbing magnetic field. Thereby, it is possible to prevent the data of the card 21 from being illegally acquired.
  • the primary disturbing magnetic field generated by the magnetic field generator 8 is also present behind the magnetic field generator 8 (Y direction).
  • the primary disturbing magnetic field does not extend backward. Therefore, the primary disturbing magnetic field does not reach the magnetic head 29 for reading magnetic data, and the magnetic head 29 can read the data on the card 21 without being affected by the primary disturbing magnetic field.
  • the influence of the primary disturbing magnetic field on the magnetic stripe detecting magnetic head 34 is the same as in the first embodiment.
  • the loop antenna 37 is provided in front of the magnetic field generation unit 8, and the secondary disturbance magnetic field due to electromagnetic induction by the loop antenna 37 based on the primary disturbance magnetic field generated by the magnetic field generation unit 8. Is generated.
  • the primary disturbing magnetic field is apparently distributed forward via the loop antenna 37.
  • the “uneven distribution” in the present invention includes such apparent uneven distribution.
  • the intensity of the disturbing magnetic field is strong at the front and weak at the rear. Therefore, by applying a strong disturbing magnetic field to the unauthorized reading device 300 attached to the front surface of the panel 200, skimming can be surely prevented, and against the magnetic head 29 in the card reader 1. Therefore, it is possible to prevent the data reading performance from deteriorating by preventing the disturbing magnetic field from reaching.
  • a loop antenna 37 is provided in front of the magnetic field generator 8 as in the second embodiment (FIG. 6).
  • a secondary disturbing magnetic field is generated in the loop antenna 37 by electromagnetic induction
  • a secondary disturbing magnetic field is generated in the loop antenna 37 by magnetic resonance.
  • the magnetic resonance causes the vibration of the magnetic field generated by the resonance of one resonance circuit to be transmitted to the other resonance circuit, and the other resonance circuit. This is a phenomenon in which a circuit resonates to generate a magnetic field vibration having the same frequency.
  • FIG. 8 shows the distribution of the disturbing magnetic field in the third embodiment.
  • a primary disturbing magnetic field indicated by a broken line is always generated from the magnetic field generator 8.
  • the primary disturbing magnetic field does not need to be linked to the loop antenna 37.
  • the loop antenna 37 is resonated by magnetic resonance, and a secondary disturbing magnetic field as indicated by a one-dot chain line is generated in the loop antenna 37.
  • the secondary disturbing magnetic field acts on the unauthorized reading device 300. For this reason, as in the case of the second embodiment, the illegal reading device 300 can prevent the data on the card 21 from being illegally acquired.
  • the primary disturbing magnetic field generated by the magnetic field generator 8 is also present behind the magnetic field generator 8 (Y direction).
  • the primary disturbing magnetic field does not extend backward.
  • the magnetic head 29 can read the data of the card 21 without being affected by the primary disturbing magnetic field.
  • the influence of the primary disturbing magnetic field on the magnetic stripe detecting magnetic head 34 is the same as in the first embodiment.
  • the loop antenna 37 is provided in front of the magnetic field generation unit 8, and the secondary disturbance magnetic field due to magnetic resonance is generated in the loop antenna 37 based on the primary disturbance magnetic field generated by the magnetic field generation unit 8. Is generated.
  • the primary disturbing magnetic field is apparently distributed forward via the loop antenna 37.
  • the intensity of the disturbing magnetic field is strong at the front and weak at the rear. Therefore, by applying a strong disturbing magnetic field to the unauthorized reading device 300 attached to the front surface of the panel 200, skimming can be surely prevented, and against the magnetic head 29 in the card reader 1. Therefore, it is possible to prevent the data reading performance from deteriorating by preventing the disturbing magnetic field from reaching.
  • FIG. 10 shows a card reader according to the fourth embodiment.
  • a magnetic body 38 made of a material having a high magnetic permeability such as ferrite or iron is inserted into the loop antenna 37 shown in FIG. Since other configurations are the same as those in FIG. 6, description of overlapping portions is omitted.
  • FIG. 11 shows the distribution of the disturbing magnetic field in the fourth embodiment.
  • a primary disturbing magnetic field indicated by a broken line is always generated from the magnetic field generator 8.
  • the primary disturbing magnetic field is guided to the magnetic body 38 that is a kind of waveguide, extends forward (X direction), and acts on the unauthorized reading device 300.
  • a secondary disturbing magnetic field indicated by a one-dot chain line is generated in the loop antenna 37 by electromagnetic induction.
  • the secondary disturbing magnetic field also acts on the unauthorized reading device 300.
  • both the primary disturbing magnetic field generated by the magnetic field generator 8 and the secondary disturbing magnetic field generated by the loop antenna 37 act on the unauthorized reading device 300. Accordingly, it is possible to more effectively prevent the data on the card 21 from being illegally acquired.
  • the influence of the primary disturbing magnetic field on the magnetic head 29 for reading magnetic data and the influence of the primary disturbing magnetic field on the magnetic head 34 for detecting the magnetic stripe are the same as those in the first embodiment.
  • the primary disturbing magnetic field is unevenly distributed forward via the magnetic body 38, and the loop antenna.
  • a secondary disturbing magnetic field is generated.
  • both the primary disturbing magnetic field and the secondary disturbing magnetic field can be applied to the unauthorized reading device 300, and skimming can be more reliably prevented by applying a stronger disturbing magnetic field.
  • the magnetic head 29 in the card reader 1 can be prevented from being affected by a disturbing magnetic field, thereby preventing the data reading performance from deteriorating.
  • FIG. 12A shows a card reader according to the fifth embodiment.
  • a roller 27 a for pressing the card 21 against the magnetic head 29 is provided facing the magnetic head 29.
  • the roller 27a includes a core member 27b and a covering member 27c such as rubber that covers the outer periphery of the core member 27b.
  • the core member 27b is made of a material having high magnetic permeability such as ferrite or iron. That is, in this embodiment, a part of the roller 27a is a magnetic body.
  • FIG. 13 shows a disturbing magnetic field distribution in the fifth embodiment.
  • a disturbing magnetic field indicated by a broken line is always generated from the magnetic field generator 8. Since the disturbing magnetic field is strong, it extends forward (X direction) and acts on the unauthorized reading device 300. For this reason, it is possible to prevent the illegal reading device 300 from illegally acquiring the data on the card 21.
  • the disturbing magnetic field generated by the magnetic field generator 8 has a high strength and therefore extends backward (Y direction).
  • the core member 27 b of the roller 27 a facing the magnetic head 29 is a magnetic body, the upper half of the disturbing magnetic field extending backward is concentrated on the roller 27 a and does not reach the magnetic head 29. Further, the lower half of the disturbing magnetic field extending rearward is below the magnetic head 29 and does not reach the magnetic head 29. For this reason, the magnetic head 29 can read the data of the card 21 without being influenced by the disturbing magnetic field.
  • the disturbing magnetic field (upper half) existing behind the magnetic field generator 8 is unevenly distributed toward the magnetic body. Will be. As a result, even if the disturbing magnetic field is strengthened to prevent skimming, the disturbing magnetic field does not reach the magnetic head 29, so that it is possible to prevent the data reading performance from deteriorating.
  • FIG. 14A shows a main part of the card reader according to the sixth embodiment.
  • a magnetic body 40 facing the magnetic head 29 is provided instead of the roller 27a of the fifth embodiment (FIG. 12).
  • the magnetic body 40 is made of a material having high magnetic permeability such as ferrite or iron.
  • the disturbing magnetic field existing behind the magnetic field generator 8 is unevenly distributed toward the magnetic body 40 as shown by the broken line. For this reason, as in the fifth embodiment, even if the disturbing magnetic field is strengthened to prevent skimming, the disturbing magnetic field does not reach the magnetic head 29, so that it is possible to avoid a decrease in data reading performance. it can.
  • the magnetic body 40 is provided on one side of the magnetic head 29, but the magnetic bodies 40a and 40b may be provided on both sides of the magnetic head 29 as shown in FIG. 14B.
  • the magnetic body 40 b of FIG. 14B may be provided below the magnetic head 29. In this way, the lower magnetic body 40b can effectively prevent the lower half of the disturbing magnetic field in FIG. 13 from reaching the magnetic head 29.
  • the magnetic body is provided at a position facing the magnetic head 29, but the position of the magnetic body is not limited to the position facing the magnetic head 29, but is a position near the magnetic head 29. If it is.
  • FIG. 15 shows a seventh embodiment of the present invention.
  • the seventh embodiment is a combination of the first embodiment (FIG. 2) and the fifth embodiment (FIG. 12). That is, a magnetic body 36 is provided in front of the magnetic field generation unit 8, and a roller 27 a including a magnetic body is provided in the rear of the magnetic field generation unit 8 so as to face the magnetic head 29. Since other configurations are the same as those in FIGS. 2 and 12, the description of the overlapping portions is omitted.
  • the disturbing magnetic field generated by the magnetic field generator 8 is unevenly distributed forward via the magnetic body 36, so that a strong disturbing magnetic field acts on the unauthorized reading device 300 to prevent skimming.
  • the rear disturbing magnetic field is unevenly distributed toward the roller 27a, it is possible to prevent the disturbing magnetic field from reaching the magnetic head 29 and the data reading performance from being deteriorated.
  • FIG. 16 shows an eighth embodiment of the present invention.
  • the eighth embodiment is a combination of the first embodiment (FIG. 2) and the sixth embodiment (FIG. 14 (a)). That is, the magnetic body 36 is provided in front of the magnetic field generation unit 8, and the magnetic body 40 is provided in the rear of the magnetic field generation unit 8 so as to face the magnetic head 29. Since other configurations are the same as those in FIG. 2 and FIG. 14A, the description of the overlapping portions is omitted.
  • the disturbing magnetic field generated by the magnetic field generator 8 is unevenly distributed forward via the magnetic body 36, so that a strong disturbing magnetic field acts on the unauthorized reading device 300 to prevent skimming.
  • the rear disturbing magnetic field is unevenly distributed toward the magnetic body 40, it is possible to prevent the disturbing magnetic field from reaching the magnetic head 29 and the data reading performance from being deteriorated.
  • FIG. 2 and FIG. 14 (b) are also possible.
  • FIG. 17 shows a ninth embodiment of the present invention.
  • the ninth embodiment is a combination of the second or third embodiment (both are FIG. 6) and the fifth embodiment (FIG. 12). That is, a loop antenna 37 is provided in front of the magnetic field generation unit 8, and a roller 27 a including a magnetic material is provided in the rear of the magnetic field generation unit 8 so as to face the magnetic head 29. Since other configurations are the same as those in FIGS. 6 and 12, description of overlapping portions is omitted.
  • the disturbing magnetic field generated by the magnetic field generator 8 is apparently unevenly distributed forward via the loop antenna 37, so that a strong disturbing magnetic field acts on the unauthorized reading device 300 to prevent skimming. Further, since the rear disturbing magnetic field is unevenly distributed toward the roller 27a, the disturbing magnetic field does not reach the magnetic head 29, and it is possible to avoid the deterioration of the data reading performance.
  • FIG. 18 shows a tenth embodiment of the present invention.
  • the tenth embodiment is a combination of the second embodiment or the third embodiment (both are FIG. 6) and the sixth embodiment (FIG. 14A). That is, a loop antenna 37 is provided in front of the magnetic field generator 8, and a magnetic body 40 is provided in the rear of the magnetic field generator 8 so as to face the magnetic head 29. Since other configurations are the same as those in FIG. 6 and FIG. 14A, the description of the overlapping portions is omitted.
  • the disturbing magnetic field generated by the magnetic field generator 8 is apparently unevenly distributed forward via the loop antenna 37, so that a strong disturbing magnetic field acts on the unauthorized reading device 300 to prevent skimming. Further, since the rear disturbing magnetic field is unevenly distributed toward the magnetic body 40, the disturbing magnetic field does not reach the magnetic head 29, and it is possible to avoid the deterioration of the data reading performance.
  • FIG. 6 and FIG. 14B a combination of FIG. 6 and FIG. 14B is also possible.
  • FIG. 10 and FIG. 14 (a) and the combination of FIG. 10 and FIG.14 (b) are also possible.
  • the magnetic field generation unit 8 is constituted by an iron core and a coil wound around the core, but the magnetic field generation unit 8 in the present invention is not limited to this.
  • the magnetic field generator 8 may be configured with a loop antenna.
  • the magnetic body 36 and the loop antenna 37 provided in front of the magnetic field generating unit 8 are attached to the panel 200 side.
  • the magnetic body 36 may be used.
  • the loop antenna 37 may be provided on the card reader side.
  • the frequency f2 of the disturbing magnetic field (secondary disturbing magnetic field) generated by the loop antenna 37 is set to be higher than the frequency f1 of the disturbing magnetic field (primary disturbing magnetic field) generated by the magnetic field generating unit 8. It may be a low frequency.
  • a frequency conversion circuit is attached to the loop antenna 37. In this way, the loop antenna 37 generates a low-frequency magnetic field suitable for interference (which is difficult to filter), and therefore skimming can be effectively prevented.
  • the magnetic field generation unit 8 since the magnetic field generation unit 8 generates a high-frequency magnetic field that can be propagated to a long distance, even if the distance between the loop antenna 37 and the magnetic field generation unit 8 is long, the magnetic field generation unit 8 can reliably connect to the loop antenna 37. Can transmit a magnetic field.
  • each countermeasure for skimming for the illegal reading device 300 attached to the front surface of the panel 200 and skimming for the magnetic head 34 for detecting the magnetic stripe has been described.
  • a countermeasure against skimming for the magnetic head 29 for reading magnetic data for example, a countermeasure such as encryption of data read by the magnetic head 29 is taken.
  • a magnetic card having a magnetic stripe on the back surface is taken as an example of the magnetic recording medium.
  • the present invention can also be applied to a magnetic recording medium reading apparatus that handles a magnetic card having magnetic stripes on the front surface or both surfaces.
  • a magnetic card is taken as an example of the magnetic recording medium.
  • the present invention can be applied not only to a magnetic card but also to an apparatus for reading a magnetic recording medium such as a passbook having a magnetic stripe.
  • the present invention can be applied to all devices for reading a magnetic recording medium, such as a card reader or passbook reader installed in an automatic transaction processing apparatus such as ATM, or a card reader installed in a card authentication terminal.

Abstract

This card reader (1) is provided with: an insertion opening (22) to which a magnetic card (21) is inserted; a conveyance means (25-28) that conveys the magnetic card (21) inserted from the insertion opening (22); a magnetic head (29) that reads data from the conveyed magnetic card (21); and a magnetic field generating unit (8) provided to the vicinity of the insertion opening (22). A magnetic body (36) is provided anteriorly to the magnetic field generating unit (8), and by means of the interfering magnetic field generated from the magnetic field generating unit (8) being biased anteriorly via the magnetic body (36), a strong interfering magnetic field acts on illicit reading devices (300) attached to the front surface of a panel (200). Meanwhile, a magnetic body is not provided posteriorly to the magnetic field generating unit (8), and so an interfering magnetic field does not extend posteriorly and the magnetic head (29) can read data from the magnetic card (21) without being affected by the interfering magnetic field.

Description

磁気記録媒体読取装置Magnetic recording medium reader
　本発明は、磁気記録媒体に記録されたデータを読み取る装置に関し、特に、データの不正取得を防止する機能を備えた磁気記録媒体読取装置に関する。 The present invention relates to an apparatus for reading data recorded on a magnetic recording medium, and more particularly to a magnetic recording medium reading apparatus having a function of preventing unauthorized acquisition of data.
　ＡＴＭ（Automated　Teller　Machine：現金自動預け払機）やＣＤ（Cash　Dispenser：現金自動支払機）などの取引処理装置には、磁気カードを読み取るカードリーダが搭載されている。このような取引処理装置において、最近では、磁気カードがカードリーダに挿入される際に、カードの磁気ストライプに記録されたデータを不正に取得するスキミングと呼ばれる犯罪が発生している。 Transaction processing devices such as ATM (Automated Teller Machine) and CD (Cash Dispenser) are equipped with a card reader that reads magnetic cards. In such a transaction processing apparatus, recently, when a magnetic card is inserted into a card reader, a crime called skimming that illegally obtains data recorded on the magnetic stripe of the card has occurred.
　典型的なスキミングの例として、磁気ヘッドを備えた不正読取装置を、ＡＴＭやＣＤに備わるカードリーダのカード挿入口の付近に設置し、この不正読取装置の磁気ヘッドにより、カードリーダに挿入される磁気カードのデータを不正に取得する方法がある。 As an example of typical skimming, an unauthorized reading device equipped with a magnetic head is installed in the vicinity of the card insertion slot of a card reader provided in an ATM or CD, and is inserted into the card reader by the magnetic head of this unauthorized reading device. There is a method for illegally obtaining data on a magnetic card.
　上記のようなスキミングに対しては、これまでにも種々の対策が提案されている。例えば、後掲の特許文献１には、カード挿入口の近傍に妨害磁界発生器を設けたカードリーダが記載されている。このカードリーダにおいては、妨害磁界発生器により、カード挿入口の外側領域に妨害磁界が発生する。このため、カード挿入口の外側に不正読取装置が取り付けられたとしても、当該装置で読み取ったデータは、妨害磁界の影響を受けて、カードに記録された元のデータとは異なるデータとなる。これにより、カードのデータが不正に取得されるのを防止することができる。 Various measures have been proposed for skimming as described above. For example, Patent Document 1 listed below describes a card reader in which a disturbing magnetic field generator is provided in the vicinity of a card insertion slot. In this card reader, a disturbing magnetic field generator generates a disturbing magnetic field in the outer region of the card insertion slot. For this reason, even if an unauthorized reading device is attached to the outside of the card insertion slot, the data read by the device is affected by the disturbing magnetic field and becomes different from the original data recorded on the card. Thereby, it is possible to prevent the card data from being illegally acquired.
　また、後掲の特許文献２には、カード挿入口の周囲に、妨害磁界を発生させるためのループアンテナを配設したカードリーダが記載されている。ループアンテナのアンテナ面は、カード挿入口の前面と平行になっている。このカードリーダにおいても、カード挿入口の外側領域に妨害磁界が発生するので、カード挿入口の外側に不正読取装置が取り付けられたとしても、カードのデータが不正に取得されるのを防止することができる。 Also, Patent Document 2 described later describes a card reader in which a loop antenna for generating a disturbing magnetic field is provided around a card insertion slot. The antenna surface of the loop antenna is parallel to the front surface of the card insertion slot. Also in this card reader, since a disturbing magnetic field is generated in the outer area of the card insertion slot, it is possible to prevent illegal acquisition of card data even if an unauthorized reading device is attached to the outside of the card insertion slot. Can do.
　図１９は、妨害磁界発生器を備えたカードリーダの一例を示している。カードリーダ１の筐体１００の前面に、カード挿入口ユニット２４が設けられている。カード挿入口ユニット２４には、磁気カード２１が挿入される挿入口２２が形成されている。挿入口２２の付近には、妨害磁界発生器３５が設けられている。筐体１００の内部には、磁気カード２１のデータを読み取る磁気ヘッド２９が設けられている。カードリーダ１は、取引処理装置のパネル２００の内側に配設されている。妨害磁界発生器３５の発生する妨害磁界は、パネル２００の前面に取り付けられる不正読取装置３００に作用し、Ａ方向に挿入される磁気カード２１からデータが不正取得されるのを阻止する。 FIG. 19 shows an example of a card reader equipped with a disturbing magnetic field generator. A card insertion slot unit 24 is provided on the front surface of the housing 100 of the card reader 1. The card insertion slot unit 24 is formed with an insertion slot 22 into which the magnetic card 21 is inserted. A disturbing magnetic field generator 35 is provided in the vicinity of the insertion port 22. A magnetic head 29 that reads data from the magnetic card 21 is provided inside the housing 100. The card reader 1 is disposed inside the panel 200 of the transaction processing apparatus. The disturbing magnetic field generated by the disturbing magnetic field generator 35 acts on the unauthorized reading device 300 attached to the front surface of the panel 200, and prevents data from being illegally acquired from the magnetic card 21 inserted in the A direction.
特開２００１－６７５２４号公報JP 2001-67524 A 特許第４４２５６７４号公報Japanese Patent No. 4425674
　図１９に示したカードリーダ１において、不正読取装置３００におけるスキミングを確実に防止するために、妨害磁界の強度を強くすればするほど、妨害磁界発生器３５の後方側に生じる磁界の強度も強くなるので、筐体１００内の磁気ヘッド２９へ妨害磁界が及んで、データの読取性能が低下するという問題がある。 In the card reader 1 shown in FIG. 19, the stronger the intensity of the disturbing magnetic field is, the stronger the intensity of the magnetic field generated on the rear side of the disturbing magnetic field generator 35 is to prevent skimming in the unauthorized reading device 300. As a result, a disturbing magnetic field is applied to the magnetic head 29 in the housing 100, and there is a problem that the data reading performance is deteriorated.
　そこで、本発明の目的は、不正読取装置に対して強い妨害磁界を作用させつつも、妨害磁界が磁気ヘッドへ及ばないようにすることで、データの読取性能が低下しないようにした磁気記録媒体読取装置を提供することにある。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a magnetic recording medium in which the reading performance of data is not deteriorated by preventing a disturbing magnetic field from reaching the magnetic head while causing a strong disturbing magnetic field to act on the unauthorized reading device. To provide a reader.
　本発明に係る磁気記録媒体読取装置は、磁気記録媒体が挿入される挿入口と、この挿入口から挿入された磁気記録媒体を搬送する搬送手段と、この搬送手段により搬送される磁気記録媒体からデータを読み取る磁気ヘッドと、挿入口付近に設けられ、当該挿入口の前方に取り付けられる不正読取装置によって磁気記録媒体のデータが読み取られるのを妨害する妨害磁界を発生する磁界発生部とを備えており、また、磁界発生部から発生する妨害磁界を偏在させて、磁気ヘッドに及ばないようにするための磁性体またはループアンテナが設けられる。 A magnetic recording medium reading apparatus according to the present invention includes an insertion slot into which a magnetic recording medium is inserted, a conveying means for conveying the magnetic recording medium inserted from the insertion opening, and a magnetic recording medium conveyed by the conveying means. A magnetic head that reads data; and a magnetic field generator that generates a disturbing magnetic field that prevents reading of data on a magnetic recording medium by an unauthorized reading device that is provided in the vicinity of the insertion slot and is attached in front of the insertion slot. In addition, a magnetic body or a loop antenna is provided for unevenly distributing the disturbing magnetic field generated from the magnetic field generator so as not to reach the magnetic head.
　このように構成したことにより、磁界発生部から発生する妨害磁界が、磁性体やループアンテナの働きによって偏在するので、妨害磁界が磁気ヘッドに及ばなくなる。このため、磁気ヘッドでは、妨害磁界に影響されずに磁気記録媒体のデータを読み取ることができ、データの読取性能が低下することが回避される。 With this configuration, the disturbing magnetic field generated from the magnetic field generator is unevenly distributed due to the action of the magnetic body and the loop antenna, so that the disturbing magnetic field does not reach the magnetic head. For this reason, the magnetic head can read the data on the magnetic recording medium without being affected by the disturbing magnetic field, and the data reading performance is prevented from deteriorating.
　本発明では、磁界発生部の前方に磁性体を設け、磁界発生部から発生する妨害磁界が、磁性体を介して前方へ偏在するようにしてもよい。 In the present invention, a magnetic body may be provided in front of the magnetic field generation unit, and the disturbing magnetic field generated from the magnetic field generation unit may be unevenly distributed forward through the magnetic body.
　本発明では、磁界発生部の前方にループアンテナを設け、磁界発生部から発生する妨害磁界に基づき、電磁誘導によりループアンテナに更に妨害磁界が発生することによって、妨害磁界が前方へ偏在するようにしてもよい。 In the present invention, a loop antenna is provided in front of the magnetic field generating unit, and the disturbing magnetic field is unevenly distributed forward by further generating a disturbing magnetic field in the loop antenna by electromagnetic induction based on the disturbing magnetic field generated from the magnetic field generating unit. May be.
　本発明では、磁界発生部の前方にループアンテナを設け、磁界発生部から発生する妨害磁界に基づき、磁気共鳴によりループアンテナに更に妨害磁界が発生することによって、妨害磁界が前方へ偏在するようにしてもよい。 In the present invention, a loop antenna is provided in front of the magnetic field generator, and the disturbing magnetic field is unevenly distributed forward by further generating a disturbing magnetic field in the loop antenna by magnetic resonance based on the disturbing magnetic field generated from the magnetic field generator. May be.
　本発明では、ループアンテナに磁性体が挿入されていてもよい。 In the present invention, a magnetic material may be inserted into the loop antenna.
　本発明では、ループアンテナが発生する妨害磁界の周波数は、磁界発生部が発生する妨害磁界の周波数よりも低い周波数であってもよい。 In the present invention, the frequency of the disturbing magnetic field generated by the loop antenna may be lower than the frequency of the disturbing magnetic field generated by the magnetic field generating unit.
　本発明では、磁界発生部の後方に磁性体を設け、この磁性体を、磁気ヘッドの近傍に配置してもよい。この場合、磁性体は、磁気ヘッドと対向して設けられたローラの一部を構成するものであってもよい。また、磁性体は、磁気ヘッドと対向して、当該磁気ヘッドの片側または両側に配置されていてもよい。 In the present invention, a magnetic material may be provided behind the magnetic field generator, and this magnetic material may be disposed in the vicinity of the magnetic head. In this case, the magnetic body may constitute a part of a roller provided to face the magnetic head. The magnetic body may be disposed on one side or both sides of the magnetic head so as to face the magnetic head.
　本発明では、磁性体を、磁界発生部の前方および後方に設けてもよい。 In the present invention, the magnetic body may be provided in front of and behind the magnetic field generator.
　本発明では、ループアンテナを磁界発生部の前方に設け、磁性体を磁界発生部の後方に設けてもよい。 In the present invention, the loop antenna may be provided in front of the magnetic field generator and the magnetic body may be provided behind the magnetic field generator.
　本発明によれば、不正読取装置に対して強い妨害磁界を作用させても、妨害磁界が磁気ヘッドへ及ばないので、データの読取性能が低下しない磁気記録媒体読取装置を提供することができる。 According to the present invention, even if a strong disturbing magnetic field is applied to the unauthorized reading device, the disturbing magnetic field does not reach the magnetic head, and therefore a magnetic recording medium reading device in which the data reading performance is not deteriorated can be provided.
図１は、本発明の実施形態に係るカードリーダの電気的構成を示したブロック図である。FIG. 1 is a block diagram showing an electrical configuration of a card reader according to an embodiment of the present invention. 図２は、第１実施形態によるカードリーダの側面断面図および正面図である。FIG. 2 is a side sectional view and a front view of the card reader according to the first embodiment. 図３は、磁気カードの平面図である。FIG. 3 is a plan view of the magnetic card. 図４は、第１実施形態における妨害磁界の分布を示した図である。FIG. 4 is a diagram showing the distribution of the disturbing magnetic field in the first embodiment. 図５は、磁気ストライプの検出を説明するための波形図である。FIG. 5 is a waveform diagram for explaining the detection of the magnetic stripe. 図６は、第２実施形態によるカードリーダの側面断面図である。FIG. 6 is a side sectional view of the card reader according to the second embodiment. 図７は、第２実施形態における妨害磁界の分布を示した図である。FIG. 7 is a diagram showing the distribution of the disturbing magnetic field in the second embodiment. 図８は、第３実施形態における妨害磁界の分布を示した図である。FIG. 8 is a diagram showing the distribution of the disturbing magnetic field in the third embodiment. 図９は、磁気共鳴を説明するための回路図である。FIG. 9 is a circuit diagram for explaining magnetic resonance. 図１０は、第４実施形態によるカードリーダの側面断面図である。FIG. 10 is a side sectional view of the card reader according to the fourth embodiment. 図１１は、第４実施形態における妨害磁界の分布を示した図である。FIG. 11 is a diagram showing the distribution of the disturbing magnetic field in the fourth embodiment. 図１２は、第５実施形態によるカードリーダの側面断面図およびローラの側面断面図である。FIG. 12 is a side sectional view of a card reader and a side sectional view of a roller according to a fifth embodiment. 図１３は、第５実施形態における妨害磁界の分布を示した図である。FIG. 13 is a diagram showing the distribution of the disturbing magnetic field in the fifth embodiment. 図１４は、第６実施形態における妨害磁界の分布を示した要部拡大図である。FIG. 14 is an enlarged view of the main part showing the distribution of the disturbing magnetic field in the sixth embodiment. 図１５は、第７実施形態によるカードリーダの側面断面図である。FIG. 15 is a side sectional view of the card reader according to the seventh embodiment. 図１６は、第８実施形態によるカードリーダの側面断面図である。FIG. 16 is a side sectional view of the card reader according to the eighth embodiment. 図１７は、第９実施形態によるカードリーダの側面断面図である。FIG. 17 is a side sectional view of the card reader according to the ninth embodiment. 図１８は、第１０実施形態によるカードリーダの側面断面図である。FIG. 18 is a side sectional view of the card reader according to the tenth embodiment. 図１９は、従来のカードリーダの側面断面図である。FIG. 19 is a side sectional view of a conventional card reader.
　以下、本発明の実施形態について、図面を参照しながら説明する。各図において、同一符号は、同一部分または対応部分を表している。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the same code | symbol represents the same part or a corresponding part.
（第１実施形態）
　まず、図１および図２を参照して、第１実施形態によるカードリーダの構成について説明する。 (First embodiment)
First, the configuration of the card reader according to the first embodiment will be described with reference to FIG. 1 and FIG.
　図１に示すように、本実施形態によるカードリーダ１は、装置全体の動作を制御するＣＰＵからなる制御部２と、磁気カードに記録されている磁気データを読み取る磁気情報読取部３と、磁気カードを搬送するカード搬送部４と、磁気カードを検出するカード検出センサ５と、磁気情報読取部３で読み取った磁気データを記憶するメモリ６と、上位装置（例えばＡＴＭ）との接続部であるホストインターフェース７と、磁気カードの磁気ストライプを検出する磁気ストライプ検出部１０と、磁気ストライプに記録されたデータの読み取りを妨げるための妨害磁界を発生する磁界発生部８とを備えている。 As shown in FIG. 1, the card reader 1 according to the present embodiment includes a control unit 2 composed of a CPU that controls the operation of the entire apparatus, a magnetic information reading unit 3 that reads magnetic data recorded on a magnetic card, and a magnetic A card transport unit 4 that transports a card, a card detection sensor 5 that detects a magnetic card, a memory 6 that stores magnetic data read by the magnetic information reading unit 3, and a connection unit between a host device (for example, ATM). The host interface 7 includes a magnetic stripe detector 10 that detects a magnetic stripe of the magnetic card, and a magnetic field generator 8 that generates a disturbing magnetic field for preventing reading of data recorded on the magnetic stripe.
　制御部２は、磁界発生部８を制御する磁界制御部９と、カード搬送部４を制御するカード搬送制御部１２とを含む。磁気ストライプ検出部１０および磁界発生部８は、カード挿入口ユニット２４内に設置されている。磁気ストライプ検出部１０は、後述する磁気ヘッド３４（図２）を含む。 The control unit 2 includes a magnetic field control unit 9 that controls the magnetic field generation unit 8 and a card conveyance control unit 12 that controls the card conveyance unit 4. The magnetic stripe detection unit 10 and the magnetic field generation unit 8 are installed in the card insertion slot unit 24. The magnetic stripe detection unit 10 includes a magnetic head 34 (FIG. 2) described later.
　図２（ａ）に示すように、カードリーダ１の筐体１００の前面には、カード挿入口ユニット２４が設けられている。カード挿入口ユニット２４には、磁気カード（以下、単に「カード」という。）２１が挿入される挿入口２２が形成されている。カード２１は、図３に示すように、磁気ストライプ２１ａを有している。図３は、カード２１を裏面から見た図である。挿入口２２の付近には、挿入されたカード２１を検出するカード挿入検出センサ２３と、カード２１の磁気ストライプ２１ａを検出する磁気ヘッド３４と、妨害磁界を発生する磁界発生部８とが設けられている。 As shown in FIG. 2A, a card insertion slot unit 24 is provided on the front surface of the casing 100 of the card reader 1. The card insertion slot unit 24 is formed with an insertion slot 22 into which a magnetic card (hereinafter simply referred to as “card”) 21 is inserted. As shown in FIG. 3, the card 21 has a magnetic stripe 21a. FIG. 3 is a view of the card 21 as seen from the back side. In the vicinity of the insertion slot 22, a card insertion detection sensor 23 that detects the inserted card 21, a magnetic head 34 that detects the magnetic stripe 21 a of the card 21, and a magnetic field generator 8 that generates a disturbing magnetic field are provided. ing.
　磁界発生部８は、例えば、鉄心と、これに巻回されたコイルとから構成される。図２（ｂ）からわかるように、磁界発生部８は、挿入口２２に向って、磁気ストライプ検出用の磁気ヘッド３４側に設けられている。 The magnetic field generator 8 includes, for example, an iron core and a coil wound around the iron core. As can be seen from FIG. 2B, the magnetic field generator 8 is provided on the magnetic head 34 side for magnetic stripe detection toward the insertion slot 22.
　カードリーダ１の筐体１００の内部には、搬送ローラ２５～２８、カード位置検出センサ３０～３３、磁気ヘッド２９が設けられている。搬送ローラ２５～２８は、それぞれ搬送路Ｐを挟んで１対設けられており、１対のローラでカード２１を挟持して搬送する。これらの搬送ローラ２５～２８は、搬送ベルト（図示省略）を介して、モータ（図示省略）に連結されている。１対の搬送ローラのうち、一方はモータの回転力が伝達される駆動ローラであり、他方はこの駆動ローラに従動して回転する従動ローラである。搬送ローラ２５～２８は、上記の搬送ベルトおよびモータとともに、カード搬送部４（図１）を構成する。カード搬送部４は、本発明における「搬送手段」の一例である。 Inside the casing 100 of the card reader 1, transport rollers 25 to 28, card position detection sensors 30 to 33, and a magnetic head 29 are provided. A pair of transport rollers 25 to 28 is provided across the transport path P, and the card 21 is sandwiched and transported by the pair of rollers. These transport rollers 25 to 28 are connected to a motor (not shown) via a transport belt (not shown). Of the pair of transport rollers, one is a driving roller to which the rotational force of the motor is transmitted, and the other is a driven roller that rotates following the driving roller. The conveyance rollers 25 to 28, together with the above-described conveyance belt and motor, constitute the card conveyance unit 4 (FIG. 1). The card transport unit 4 is an example of the “transport means” in the present invention.
　カード位置検出センサ３０～３３は、透過型の光センサであり、それぞれ、搬送路Ｐを挟んで対向する発光部と受光部を有している。これらのセンサ３０～３３の配置間隔は、磁気カード２１の搬送方向の長さよりも短くなっている。センサ３０は、挿入口２２に最も近い搬送ローラ２５にカード２１が挟持されたことを検出する。センサ３３は、挿入されたカード２１が、カードを一時的に貯留する貯留部（図示省略）に達したことを検出する。センサ３１、３２は、搬送中のカード２１の位置を検出する。これらのカード位置検出センサ３０～３３は、前記のカード挿入検出センサ２３とともに、カード検出センサ５（図１）を構成する。 The card position detection sensors 30 to 33 are transmissive optical sensors, each having a light emitting part and a light receiving part that are opposed to each other with the conveyance path P interposed therebetween. The arrangement interval of these sensors 30 to 33 is shorter than the length of the magnetic card 21 in the transport direction. The sensor 30 detects that the card 21 is sandwiched between the transport rollers 25 closest to the insertion port 22. The sensor 33 detects that the inserted card 21 has reached a storage part (not shown) that temporarily stores the card. The sensors 31 and 32 detect the position of the card 21 being conveyed. These card position detection sensors 30 to 33 together with the card insertion detection sensor 23 constitute a card detection sensor 5 (FIG. 1).
　磁気ヘッド２９は、搬送ローラ２６と搬送ローラ２７との間で、搬送路Ｐの下側に設けられている。この磁気ヘッド２９は、挿入されたカード２１が搬送路Ｐを搬送される過程で、カード２１の磁気ストライプ２１ａに記録されているデータを読み取る。前述の磁気ヘッド３４が、磁気ストライプに記録されているデータの有無を検出するための磁気ヘッドであるのに対し、磁気ヘッド２９は、磁気ストライプに記録されているデータそのものを再生するための磁気ヘッドである。磁気ヘッド２９とセンサ３３との間隔は、カード２１の搬送方向の長さよりも少し長くなっている。したがって、カード２１が貯留部に達した際、すなわち、カード２１の先端がセンサ３３の位置に達した際には、磁気ヘッド２９は、カード２１に記録されているデータの読み取りを完了している。 The magnetic head 29 is provided below the conveyance path P between the conveyance roller 26 and the conveyance roller 27. The magnetic head 29 reads data recorded on the magnetic stripe 21 a of the card 21 in the process in which the inserted card 21 is transported along the transport path P. The magnetic head 34 is a magnetic head for detecting the presence / absence of data recorded on the magnetic stripe, whereas the magnetic head 29 is a magnetic head for reproducing the data itself recorded on the magnetic stripe. Head. The distance between the magnetic head 29 and the sensor 33 is slightly longer than the length of the card 21 in the transport direction. Therefore, when the card 21 reaches the storage unit, that is, when the tip of the card 21 reaches the position of the sensor 33, the magnetic head 29 has completed reading of data recorded on the card 21. .
　カードリーダ１は、取引処理装置のパネル２００の内側に配設されている。パネル２００の開口からＡ方向に挿入されたカード２１は、カードリーダ１の挿入口２２へ導かれる。磁界発生部８の前方で、パネル２００とカード挿入口ユニット２４との間には、フェライトや鉄のような透磁率の高い材料からなる磁性体３６が配設されている。この磁性体３６は、例えば、パネル２００に設けられた支持部材（図示省略）に取り付けられている。カードリーダ１と磁性体３６により、本発明の磁気記録媒体読取装置が構成される。 The card reader 1 is disposed inside the panel 200 of the transaction processing apparatus. The card 21 inserted in the A direction from the opening of the panel 200 is guided to the insertion port 22 of the card reader 1. A magnetic body 36 made of a material having high magnetic permeability such as ferrite or iron is disposed between the panel 200 and the card insertion slot unit 24 in front of the magnetic field generator 8. The magnetic body 36 is attached to a support member (not shown) provided on the panel 200, for example. The card reader 1 and the magnetic body 36 constitute a magnetic recording medium reading device of the present invention.
　次に、図２（ａ）のように、パネル２００の前面に磁気ヘッドを含む不正読取装置３００が取り付けられた場合のスキミング対策について説明する。 Next, as shown in FIG. 2A, a countermeasure against skimming when an illegal reading device 300 including a magnetic head is attached to the front surface of the panel 200 will be described.
　磁界制御部９（図１）の制御に基づき、磁界発生部８に駆動電流が流れると、磁界発生部８は、妨害磁界を発生させる。本実施形態では、磁界発生部８に継続して駆動電流を流すことで、磁界発生部８は常時、妨害磁界を発生している。磁界発生部８で発生した妨害磁界は、図４の破線で示すように、一種の導波路となる磁性体３６に導かれて、前方（Ｘ方向）へ延び、不正読取装置３００に作用する。このため、不正読取装置３００で読み取ったデータは、妨害磁界の影響を受けて、カード２１に記録された元のデータとは異なるデータとなる。これにより、カード２１のデータが不正に取得されるのを防止することができる。 When a drive current flows through the magnetic field generator 8 based on the control of the magnetic field controller 9 (FIG. 1), the magnetic field generator 8 generates a disturbing magnetic field. In the present embodiment, the magnetic field generator 8 always generates a disturbing magnetic field by continuously supplying a drive current to the magnetic field generator 8. As shown by the broken line in FIG. 4, the disturbing magnetic field generated by the magnetic field generation unit 8 is guided to the magnetic body 36 serving as a kind of waveguide, extends forward (X direction), and acts on the unauthorized reading device 300. Therefore, the data read by the unauthorized reading device 300 is different from the original data recorded on the card 21 due to the influence of the disturbing magnetic field. Thereby, it is possible to prevent the data of the card 21 from being illegally acquired.
　一方、磁界発生部８で発生した妨害磁界は、磁界発生部８の後方（Ｙ方向）にも存在する。しかしながら、磁界発生部８の後方には、磁性体が設けられていないため、妨害磁界は磁性体を介して後方へ延びることはない。このため、妨害磁界が、磁気データ読取用の磁気ヘッド２９に及ぶことがなく、磁気ヘッド２９は、妨害磁界に影響されずにカード２１のデータを読み取ることができる。 On the other hand, the disturbing magnetic field generated by the magnetic field generator 8 is also present behind the magnetic field generator 8 (Y direction). However, since no magnetic material is provided behind the magnetic field generator 8, the disturbing magnetic field does not extend backward through the magnetic material. Therefore, the disturbing magnetic field does not reach the magnetic data reading magnetic head 29, and the magnetic head 29 can read the data of the card 21 without being affected by the disturbing magnetic field.
　このように、第１実施形態においては、磁界発生部８の前方に磁性体３６を設けたことにより、磁界発生部８で発生した妨害磁界が、磁性体３６を介して前方へ偏在することとなる。この結果、妨害磁界の強度は、前方が強く、後方が弱いものとなる。したがって、パネル２００の前面に取り付けられた不正読取装置３００に対しては、強い妨害磁界を作用させることで、スキミングを確実に防止することができ、また、カードリーダ１内の磁気ヘッド２９に対しては、妨害磁界が及ばないようにして、データの読取性能が低下するのを回避することができる。 As described above, in the first embodiment, by providing the magnetic body 36 in front of the magnetic field generator 8, the disturbing magnetic field generated in the magnetic field generator 8 is unevenly distributed forward via the magnetic body 36. Become. As a result, the intensity of the disturbing magnetic field is strong at the front and weak at the rear. Therefore, by applying a strong disturbing magnetic field to the unauthorized reading device 300 attached to the front surface of the panel 200, skimming can be surely prevented, and against the magnetic head 29 in the card reader 1. Therefore, it is possible to prevent the data reading performance from deteriorating by preventing the disturbing magnetic field from reaching.
　また、磁界発生部８で発生した妨害磁界は、磁気ストライプ検出用の磁気ヘッド３４にも作用する。このため、磁気ヘッド３４にリード線を介して不正読取装置が接続された場合でも、データが不正に取得されるのを防止することができる。なお、妨害磁界が常時磁気ヘッド３４に作用しても、磁気ヘッド３４は磁気データそのものを再生する必要はないので、例えば、磁気ストライプ２１ａの検出の前後で検出信号のパターンが異なることを利用して、磁気ストライプ２１ａを検出することができる。これを図５で説明する。 The disturbing magnetic field generated by the magnetic field generator 8 also acts on the magnetic head 34 for detecting the magnetic stripe. For this reason, even when an unauthorized reading device is connected to the magnetic head 34 via a lead wire, it is possible to prevent data from being illegally acquired. Even if the disturbing magnetic field always acts on the magnetic head 34, the magnetic head 34 does not need to reproduce the magnetic data itself. For example, the fact that the detection signal pattern is different before and after the detection of the magnetic stripe 21a is used. Thus, the magnetic stripe 21a can be detected. This will be described with reference to FIG.
　図５（ａ）は、磁界発生部８に流れる駆動電流の波形である。磁界発生部８からは、この駆動電流に応じた妨害磁界が発生する。図５（ｂ）は、妨害磁界が存在しない場合に、磁気ヘッド３４から出力される検出信号の波形である。図５（ｃ）は、妨害磁界が存在する場合に、磁気ヘッド３４から出力される検出信号の波形であり、図５（ａ）と図５（ｂ）とを合成した波形となる。図５（ｃ）からわかるように、磁気ストライプが検出された時刻ｔの前と後とでは、検出信号のパターンが異なる。したがって、このパターンの変化を以って、磁気ストライプの検出が可能となる。 FIG. 5A shows the waveform of the drive current flowing through the magnetic field generator 8. A disturbing magnetic field corresponding to this drive current is generated from the magnetic field generator 8. FIG. 5B shows a waveform of a detection signal output from the magnetic head 34 when there is no disturbing magnetic field. FIG. 5C shows a waveform of a detection signal output from the magnetic head 34 when a disturbing magnetic field exists, and is a waveform obtained by synthesizing FIG. 5A and FIG. 5B. As can be seen from FIG. 5C, the pattern of the detection signal is different before and after the time t when the magnetic stripe is detected. Therefore, the magnetic stripe can be detected by the change of the pattern.
（第２実施形態）
　次に、本発明の第２実施形態について説明する。なお、第２実施形態におけるカードリーダの電気的構成については、図１と同じであるので、説明を省略する。 (Second Embodiment)
Next, a second embodiment of the present invention will be described. The electrical configuration of the card reader in the second embodiment is the same as that in FIG.
　図６は、第２実施形態によるカードリーダを示している。前記の第１実施形態（図２）では、磁界発生部８の前方に、磁性体３６が設けられていた。これに対して、第２実施形態では、磁界発生部８の前方に、ループアンテナ３７が設けられている。このループアンテナ３７も、磁性体３６と同様に、パネル２００に設けられた支持部材（図示省略）に取り付けられている。カードリーダ１とループアンテナ３７により、本発明の磁気記録媒体読取装置が構成される。その他の構成に関しては、図２と同じであるので、重複部分の説明を省略する。 FIG. 6 shows a card reader according to the second embodiment. In the first embodiment (FIG. 2), the magnetic body 36 is provided in front of the magnetic field generator 8. On the other hand, in the second embodiment, a loop antenna 37 is provided in front of the magnetic field generator 8. Similarly to the magnetic body 36, the loop antenna 37 is also attached to a support member (not shown) provided on the panel 200. The card reader 1 and the loop antenna 37 constitute a magnetic recording medium reading device of the present invention. Since other configurations are the same as those in FIG. 2, description of overlapping portions is omitted.
　磁界発生部８からは、常時、妨害磁界が発生している。本実施形態では、磁界発生部８で発生した妨害磁界（１次妨害磁界）が、図７の破線で示すように、ループアンテナ３７と鎖交する。このため、ループアンテナ３７において、電磁誘導により、一点鎖線で示すような妨害磁界（２次妨害磁界）が発生する。そして、１次妨害磁界が不正読取装置３００に届かなくても、２次妨害磁界が不正読取装置３００に作用する。このため、不正読取装置３００で読み取ったデータは、２次妨害磁界の影響を受けて、カード２１に記録された元のデータとは異なるデータとなる。これにより、カード２１のデータが不正に取得されるのを防止することができる。 The disturbing magnetic field is always generated from the magnetic field generator 8. In the present embodiment, the disturbing magnetic field (primary disturbing magnetic field) generated by the magnetic field generator 8 is linked to the loop antenna 37 as indicated by a broken line in FIG. For this reason, in the loop antenna 37, an interference magnetic field (secondary interference magnetic field) as shown by a one-dot chain line is generated by electromagnetic induction. Even if the primary disturbing magnetic field does not reach the unauthorized reading device 300, the secondary disturbing magnetic field acts on the unauthorized reading device 300. For this reason, the data read by the unauthorized reading device 300 is different from the original data recorded on the card 21 due to the influence of the secondary disturbing magnetic field. Thereby, it is possible to prevent the data of the card 21 from being illegally acquired.
　一方、磁界発生部８で発生した１次妨害磁界は、磁界発生部８の後方（Ｙ方向）にも存在する。しかしながら、磁界発生部８の後方には、磁性体やループアンテナが設けられていないため、１次妨害磁界は後方へ延びることはない。このため、１次妨害磁界が、磁気データ読取用の磁気ヘッド２９に及ぶことがなく、磁気ヘッド２９は、１次妨害磁界に影響されずにカード２１のデータを読み取ることができる。なお、磁気ストライプ検出用の磁気ヘッド３４に対する１次妨害磁界の影響については、第１実施形態の場合と同じである。 On the other hand, the primary disturbing magnetic field generated by the magnetic field generator 8 is also present behind the magnetic field generator 8 (Y direction). However, since no magnetic material or loop antenna is provided behind the magnetic field generator 8, the primary disturbing magnetic field does not extend backward. Therefore, the primary disturbing magnetic field does not reach the magnetic head 29 for reading magnetic data, and the magnetic head 29 can read the data on the card 21 without being affected by the primary disturbing magnetic field. The influence of the primary disturbing magnetic field on the magnetic stripe detecting magnetic head 34 is the same as in the first embodiment.
　このように、第２実施形態においては、磁界発生部８の前方にループアンテナ３７を設け、磁界発生部８で発生した１次妨害磁界に基づいて、ループアンテナ３７で電磁誘導による２次妨害磁界を発生させる。この結果、１次妨害磁界が、見掛け上、ループアンテナ３７を介して前方へ偏在することとなる。本発明でいう「偏在」は、このような見掛け上の偏在も含む。この結果、妨害磁界の強度は、前方が強く、後方が弱いものとなる。したがって、パネル２００の前面に取り付けられた不正読取装置３００に対しては、強い妨害磁界を作用させることで、スキミングを確実に防止することができ、また、カードリーダ１内の磁気ヘッド２９に対しては、妨害磁界が及ばないようにして、データの読取性能が低下するのを回避することができる。 As described above, in the second embodiment, the loop antenna 37 is provided in front of the magnetic field generation unit 8, and the secondary disturbance magnetic field due to electromagnetic induction by the loop antenna 37 based on the primary disturbance magnetic field generated by the magnetic field generation unit 8. Is generated. As a result, the primary disturbing magnetic field is apparently distributed forward via the loop antenna 37. The “uneven distribution” in the present invention includes such apparent uneven distribution. As a result, the intensity of the disturbing magnetic field is strong at the front and weak at the rear. Therefore, by applying a strong disturbing magnetic field to the unauthorized reading device 300 attached to the front surface of the panel 200, skimming can be surely prevented, and against the magnetic head 29 in the card reader 1. Therefore, it is possible to prevent the data reading performance from deteriorating by preventing the disturbing magnetic field from reaching.
（第３実施形態）
　次に、本発明の第３実施形態について説明する。なお、第３実施形態におけるカードリーダの構成については、図１および図６と同じであるので、説明を省略する。 (Third embodiment)
Next, a third embodiment of the present invention will be described. The configuration of the card reader in the third embodiment is the same as that shown in FIGS.
　第３実施形態では、第２実施形態（図６）と同様に、磁界発生部８の前方に、ループアンテナ３７が設けられる。但し、第２実施形態の場合は、電磁誘導によりループアンテナ３７に２次妨害磁界を発生させたのに対し、第３実施形態の場合は、磁気共鳴によりループアンテナ３７に２次妨害磁界を発生させる。 In the third embodiment, a loop antenna 37 is provided in front of the magnetic field generator 8 as in the second embodiment (FIG. 6). However, in the second embodiment, a secondary disturbing magnetic field is generated in the loop antenna 37 by electromagnetic induction, whereas in the third embodiment, a secondary disturbing magnetic field is generated in the loop antenna 37 by magnetic resonance. Let
　磁気共鳴は、図９に示すように、同じ共振周波数を有する２つの共振回路を近づけて配置したとき、一方の共振回路の共振により発生した磁場の振動が他方の共振回路に伝わり、他方の共振回路が共振して同じ周波数の磁場の振動を発生させる現象である。 As shown in FIG. 9, when two resonance circuits having the same resonance frequency are arranged close to each other, the magnetic resonance causes the vibration of the magnetic field generated by the resonance of one resonance circuit to be transmitted to the other resonance circuit, and the other resonance circuit. This is a phenomenon in which a circuit resonates to generate a magnetic field vibration having the same frequency.
　図８は、第３実施形態における妨害磁界の分布を示している。磁界発生部８からは、常時、破線で示す１次妨害磁界が発生している。本実施形態では、磁気共鳴を利用するので、１次妨害磁界はループアンテナ３７と鎖交する必要はない。磁界発生部８で共振により１次妨害磁界が発生すると、磁気共鳴によりループアンテナ３７が共振し、ループアンテナ３７において、一点鎖線で示すような２次妨害磁界が発生する。そして、この２次妨害磁界が不正読取装置３００に作用する。このため、第２実施形態の場合と同様に、不正読取装置３００によりカード２１のデータが不正に取得されるのを防止することができる。 FIG. 8 shows the distribution of the disturbing magnetic field in the third embodiment. A primary disturbing magnetic field indicated by a broken line is always generated from the magnetic field generator 8. In this embodiment, since magnetic resonance is used, the primary disturbing magnetic field does not need to be linked to the loop antenna 37. When a primary disturbing magnetic field is generated by resonance in the magnetic field generator 8, the loop antenna 37 is resonated by magnetic resonance, and a secondary disturbing magnetic field as indicated by a one-dot chain line is generated in the loop antenna 37. The secondary disturbing magnetic field acts on the unauthorized reading device 300. For this reason, as in the case of the second embodiment, the illegal reading device 300 can prevent the data on the card 21 from being illegally acquired.
　一方、磁界発生部８で発生した１次妨害磁界は、磁界発生部８の後方（Ｙ方向）にも存在する。しかしながら、磁界発生部８の後方には、磁性体やループアンテナが設けられていないため、１次妨害磁界は後方へ延びることはない。このため、第２実施形態の場合と同様に、磁気ヘッド２９は、１次妨害磁界に影響されずにカード２１のデータを読み取ることができる。なお、磁気ストライプ検出用の磁気ヘッド３４に対する１次妨害磁界の影響については、第１実施形態の場合と同じである。 On the other hand, the primary disturbing magnetic field generated by the magnetic field generator 8 is also present behind the magnetic field generator 8 (Y direction). However, since no magnetic material or loop antenna is provided behind the magnetic field generator 8, the primary disturbing magnetic field does not extend backward. For this reason, as in the case of the second embodiment, the magnetic head 29 can read the data of the card 21 without being affected by the primary disturbing magnetic field. The influence of the primary disturbing magnetic field on the magnetic stripe detecting magnetic head 34 is the same as in the first embodiment.
　このように、第３実施形態においては、磁界発生部８の前方にループアンテナ３７を設け、磁界発生部８で発生した１次妨害磁界に基づいて、ループアンテナ３７で磁気共鳴による２次妨害磁界を発生させる。この結果、１次妨害磁界が、見掛け上、ループアンテナ３７を介して前方へ偏在することとなる。この結果、妨害磁界の強度は、前方が強く、後方が弱いものとなる。したがって、パネル２００の前面に取り付けられた不正読取装置３００に対しては、強い妨害磁界を作用させることで、スキミングを確実に防止することができ、また、カードリーダ１内の磁気ヘッド２９に対しては、妨害磁界が及ばないようにして、データの読取性能が低下するのを回避することができる。 As described above, in the third embodiment, the loop antenna 37 is provided in front of the magnetic field generation unit 8, and the secondary disturbance magnetic field due to magnetic resonance is generated in the loop antenna 37 based on the primary disturbance magnetic field generated by the magnetic field generation unit 8. Is generated. As a result, the primary disturbing magnetic field is apparently distributed forward via the loop antenna 37. As a result, the intensity of the disturbing magnetic field is strong at the front and weak at the rear. Therefore, by applying a strong disturbing magnetic field to the unauthorized reading device 300 attached to the front surface of the panel 200, skimming can be surely prevented, and against the magnetic head 29 in the card reader 1. Therefore, it is possible to prevent the data reading performance from deteriorating by preventing the disturbing magnetic field from reaching.
（第４実施形態）
　次に、本発明の第４実施形態について説明する。なお、第４実施形態におけるカードリーダの電気的構成については、図１と同じであるので、説明を省略する。 (Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. The electrical configuration of the card reader in the fourth embodiment is the same as that in FIG.
　図１０は、第４実施形態によるカードリーダを示している。図１０では、図６におけるループアンテナ３７に、フェライトや鉄のような透磁率の高い材料からなる磁性体３８が挿入されている。その他の構成に関しては、図６と同じであるので、重複部分の説明を省略する。 FIG. 10 shows a card reader according to the fourth embodiment. In FIG. 10, a magnetic body 38 made of a material having a high magnetic permeability such as ferrite or iron is inserted into the loop antenna 37 shown in FIG. Since other configurations are the same as those in FIG. 6, description of overlapping portions is omitted.
　図１１は、第４実施形態における妨害磁界の分布を示している。磁界発生部８からは、常時、破線で示す１次妨害磁界が発生している。この１次妨害磁界は、一種の導波路となる磁性体３８に導かれて、前方（Ｘ方向）へ延び、不正読取装置３００に作用する。また、１次妨害磁界がループアンテナ３７と鎖交することにより、ループアンテナ３７において、電磁誘導により、一点鎖線で示す２次妨害磁界が発生する。そして、この２次妨害磁界も不正読取装置３００に作用する。このため、不正読取装置３００には、磁界発生部８で発生した１次妨害磁界と、ループアンテナ３７で発生した２次妨害磁界の両方が作用することになる。したがって、カード２１のデータが不正に取得されるのをより効果的に防止することができる。 FIG. 11 shows the distribution of the disturbing magnetic field in the fourth embodiment. A primary disturbing magnetic field indicated by a broken line is always generated from the magnetic field generator 8. The primary disturbing magnetic field is guided to the magnetic body 38 that is a kind of waveguide, extends forward (X direction), and acts on the unauthorized reading device 300. Further, when the primary disturbing magnetic field is linked to the loop antenna 37, a secondary disturbing magnetic field indicated by a one-dot chain line is generated in the loop antenna 37 by electromagnetic induction. The secondary disturbing magnetic field also acts on the unauthorized reading device 300. For this reason, both the primary disturbing magnetic field generated by the magnetic field generator 8 and the secondary disturbing magnetic field generated by the loop antenna 37 act on the unauthorized reading device 300. Accordingly, it is possible to more effectively prevent the data on the card 21 from being illegally acquired.
　なお、磁気データ読取用の磁気ヘッド２９に対する１次妨害磁界の影響、および磁気ストライプ検出用の磁気ヘッド３４に対する１次妨害磁界の影響については、第１実施形態の場合と同じである。 The influence of the primary disturbing magnetic field on the magnetic head 29 for reading magnetic data and the influence of the primary disturbing magnetic field on the magnetic head 34 for detecting the magnetic stripe are the same as those in the first embodiment.
　また、ここでは、電磁誘導により２次妨害磁界を発生させる例を挙げたが、磁気共鳴より２次妨害磁界を発生させる場合にも、第４実施形態は適用が可能である。 Also, here, an example has been given in which a secondary disturbing magnetic field is generated by electromagnetic induction, but the fourth embodiment can also be applied when a secondary disturbing magnetic field is generated by magnetic resonance.
　このように、第４実施形態においては、磁界発生部８の前方にループアンテナ３７および磁性体３８を設けたことにより、１次妨害磁界が磁性体３８を介して前方へ偏在するとともに、ループアンテナ３７において２次妨害磁界が発生する。この結果、不正読取装置３００に対して１次妨害磁界と２次妨害磁界の両方を作用させることができ、より強い妨害磁界を作用させることで、スキミングを一層確実に防止することができる。また、カードリーダ１内の磁気ヘッド２９に対しては、妨害磁界が及ばないようにして、データの読取性能が低下するのを回避することができる。 Thus, in the fourth embodiment, by providing the loop antenna 37 and the magnetic body 38 in front of the magnetic field generator 8, the primary disturbing magnetic field is unevenly distributed forward via the magnetic body 38, and the loop antenna. At 37, a secondary disturbing magnetic field is generated. As a result, both the primary disturbing magnetic field and the secondary disturbing magnetic field can be applied to the unauthorized reading device 300, and skimming can be more reliably prevented by applying a stronger disturbing magnetic field. Further, the magnetic head 29 in the card reader 1 can be prevented from being affected by a disturbing magnetic field, thereby preventing the data reading performance from deteriorating.
（第５実施形態）
　次に、本発明の第５実施形態について説明する。なお、第５実施形態におけるカードリーダの電気的構成については、図１と同じであるので、説明を省略する。 (Fifth embodiment)
Next, a fifth embodiment of the present invention will be described. The electrical configuration of the card reader in the fifth embodiment is the same as in FIG.
　図１２（ａ）は、第５実施形態によるカードリーダを示している。図１２（ａ）では、磁気ヘッド２９と対向して、カード２１を磁気ヘッド２９に押圧するためのローラ２７aが設けられている。このローラ２７aは、図１２（ｂ）に示すように、コア部材２７ｂと、その外周を覆うゴムなどの被覆部材２７ｃとから構成される。そして、コア部材２７ｂはフェライトや鉄のような透磁率の高い材料からなる。すなわち、本実施形態では、ローラ２７aの一部が磁性体となっている。 FIG. 12A shows a card reader according to the fifth embodiment. In FIG. 12A, a roller 27 a for pressing the card 21 against the magnetic head 29 is provided facing the magnetic head 29. As shown in FIG. 12B, the roller 27a includes a core member 27b and a covering member 27c such as rubber that covers the outer periphery of the core member 27b. The core member 27b is made of a material having high magnetic permeability such as ferrite or iron. That is, in this embodiment, a part of the roller 27a is a magnetic body.
　図１３は、第５実施形態における妨害磁界の分布を示している。磁界発生部８からは、常時、破線で示す妨害磁界が発生している。この妨害磁界は、強度が強いため、前方（Ｘ方向）へ延びて、不正読取装置３００に作用する。このため、不正読取装置３００によりカード２１のデータが不正に取得されるのを防止することができる。 FIG. 13 shows a disturbing magnetic field distribution in the fifth embodiment. A disturbing magnetic field indicated by a broken line is always generated from the magnetic field generator 8. Since the disturbing magnetic field is strong, it extends forward (X direction) and acts on the unauthorized reading device 300. For this reason, it is possible to prevent the illegal reading device 300 from illegally acquiring the data on the card 21.
　一方、磁界発生部８で発生した妨害磁界は、強度が強いことから、後方（Ｙ方向）へも延びる。しかるに、磁気ヘッド２９と対向するローラ２７aのコア部材２７ｂが磁性体であるため、後方に延びる妨害磁界の上半分は、ローラ２７aに集約され、磁気ヘッド２９には及ばない。また、後方に延びる妨害磁界の下半分は、磁気ヘッド２９の下方にあり、磁気ヘッド２９には及ばない。このため、磁気ヘッド２９は、妨害磁界に影響されずにカード２１のデータを読み取ることができる。 On the other hand, the disturbing magnetic field generated by the magnetic field generator 8 has a high strength and therefore extends backward (Y direction). However, since the core member 27 b of the roller 27 a facing the magnetic head 29 is a magnetic body, the upper half of the disturbing magnetic field extending backward is concentrated on the roller 27 a and does not reach the magnetic head 29. Further, the lower half of the disturbing magnetic field extending rearward is below the magnetic head 29 and does not reach the magnetic head 29. For this reason, the magnetic head 29 can read the data of the card 21 without being influenced by the disturbing magnetic field.
　このように、第５実施形態においては、磁気ヘッド２９と対向して磁性体が設けられているので、磁界発生部８の後方に存在する妨害磁界（上半分）は、磁性体に向けて偏在することとなる。この結果、スキミング防止のために妨害磁界を強くしても、磁気ヘッド２９に対して妨害磁界が及ばないので、データの読取性能が低下するのを回避することができる。 As described above, in the fifth embodiment, since the magnetic body is provided to face the magnetic head 29, the disturbing magnetic field (upper half) existing behind the magnetic field generator 8 is unevenly distributed toward the magnetic body. Will be. As a result, even if the disturbing magnetic field is strengthened to prevent skimming, the disturbing magnetic field does not reach the magnetic head 29, so that it is possible to prevent the data reading performance from deteriorating.
（第６実施形態）
　次に、本発明の第６実施形態について説明する。なお、第６実施形態におけるカードリーダの電気的構成については、図１と同じであるので、説明を省略する。 (Sixth embodiment)
Next, a sixth embodiment of the present invention will be described. The electrical configuration of the card reader in the sixth embodiment is the same as that in FIG.
　図１４（ａ）は、第６実施形態によるカードリーダの要部を示している。第６実施形態では、第５実施形態（図１２）のローラ２７ａに代えて、磁気ヘッド２９と対向する磁性体４０が設けられている。この磁性体４０は、フェライトや鉄のような透磁率の高い材料からなる。 FIG. 14A shows a main part of the card reader according to the sixth embodiment. In the sixth embodiment, a magnetic body 40 facing the magnetic head 29 is provided instead of the roller 27a of the fifth embodiment (FIG. 12). The magnetic body 40 is made of a material having high magnetic permeability such as ferrite or iron.
　このように、磁気ヘッド２９と対向して磁性体４０を設けた場合も、磁界発生部８の後方に存在する妨害磁界は、破線で示すように、磁性体４０に向けて偏在する。このため、第５実施形態と同様に、スキミング防止のために妨害磁界を強くしても、磁気ヘッド２９に対して妨害磁界が及ばないので、データの読取性能が低下するのを回避することができる。 As described above, even when the magnetic body 40 is provided so as to face the magnetic head 29, the disturbing magnetic field existing behind the magnetic field generator 8 is unevenly distributed toward the magnetic body 40 as shown by the broken line. For this reason, as in the fifth embodiment, even if the disturbing magnetic field is strengthened to prevent skimming, the disturbing magnetic field does not reach the magnetic head 29, so that it is possible to avoid a decrease in data reading performance. it can.
　図１４（ａ）では、磁気ヘッド２９の片側に磁性体４０が設けられているが、図１４（ｂ）に示すように、磁気ヘッド２９の両側に磁性体４０ａ、４０ｂを設けてもよい。また、図１２において、磁気ヘッド２９の下側に、図１４（ｂ）の磁性体４０ｂを設けてもよい。このようにすれば、図１３における下半分の妨害磁界が磁気ヘッド２９に及ぶのを、下側の磁性体４０ｂによって効果的に阻止することができる。 14A, the magnetic body 40 is provided on one side of the magnetic head 29, but the magnetic bodies 40a and 40b may be provided on both sides of the magnetic head 29 as shown in FIG. 14B. In FIG. 12, the magnetic body 40 b of FIG. 14B may be provided below the magnetic head 29. In this way, the lower magnetic body 40b can effectively prevent the lower half of the disturbing magnetic field in FIG. 13 from reaching the magnetic head 29.
　なお、図１２および図１４においては、磁気ヘッド２９と対向する位置に磁性体を設けたが、磁性体の位置は、磁気ヘッド２９と対向する位置だけに限らず、磁気ヘッド２９の近傍の位置であればよい。 In FIGS. 12 and 14, the magnetic body is provided at a position facing the magnetic head 29, but the position of the magnetic body is not limited to the position facing the magnetic head 29, but is a position near the magnetic head 29. If it is.
（第７実施形態）
　図１５は、本発明の第７実施形態を示している。第７実施形態は、第１実施形態（図２）と、第５実施形態（図１２）とを組み合わせたものである。すなわち、磁界発生部８の前方には、磁性体３６が設けられるとともに、磁界発生部８の後方には、磁気ヘッド２９と対向して磁性体を含むローラ２７ａが設けられる。その他の構成に関しては、図２および図１２と同じであるので、重複部分の説明を省略する。 (Seventh embodiment)
FIG. 15 shows a seventh embodiment of the present invention. The seventh embodiment is a combination of the first embodiment (FIG. 2) and the fifth embodiment (FIG. 12). That is, a magnetic body 36 is provided in front of the magnetic field generation unit 8, and a roller 27 a including a magnetic body is provided in the rear of the magnetic field generation unit 8 so as to face the magnetic head 29. Since other configurations are the same as those in FIGS. 2 and 12, the description of the overlapping portions is omitted.
　第７実施形態によれば、磁界発生部８で発生した妨害磁界が、磁性体３６を介して前方へ偏在することで、不正読取装置３００に強い妨害磁界が作用してスキミングを防止することができ、また、後方の妨害磁界が、ローラ２７ａに向けて偏在することで、磁気ヘッド２９に妨害磁界が及ばなくなり、データの読取性能が低下するのを回避することができる。 According to the seventh embodiment, the disturbing magnetic field generated by the magnetic field generator 8 is unevenly distributed forward via the magnetic body 36, so that a strong disturbing magnetic field acts on the unauthorized reading device 300 to prevent skimming. In addition, since the rear disturbing magnetic field is unevenly distributed toward the roller 27a, it is possible to prevent the disturbing magnetic field from reaching the magnetic head 29 and the data reading performance from being deteriorated.
（第８実施形態）
　図１６は、本発明の第８実施形態を示している。第８実施形態は、第１実施形態（図２）と、第６実施形態（図１４（ａ））とを組み合わせたものである。すなわち、磁界発生部８の前方には、磁性体３６が設けられるとともに、磁界発生部８の後方には、磁気ヘッド２９と対向して磁性体４０が設けられる。その他の構成に関しては、図２および図１４（ａ）と同じであるので、重複部分の説明を省略する。 (Eighth embodiment)
FIG. 16 shows an eighth embodiment of the present invention. The eighth embodiment is a combination of the first embodiment (FIG. 2) and the sixth embodiment (FIG. 14 (a)). That is, the magnetic body 36 is provided in front of the magnetic field generation unit 8, and the magnetic body 40 is provided in the rear of the magnetic field generation unit 8 so as to face the magnetic head 29. Since other configurations are the same as those in FIG. 2 and FIG. 14A, the description of the overlapping portions is omitted.
　第８実施形態によれば、磁界発生部８で発生した妨害磁界が、磁性体３６を介して前方へ偏在することで、不正読取装置３００に強い妨害磁界が作用してスキミングを防止することができ、また、後方の妨害磁界が、磁性体４０に向けて偏在することで、磁気ヘッド２９に妨害磁界が及ばなくなり、データの読取性能が低下するのを回避することができる According to the eighth embodiment, the disturbing magnetic field generated by the magnetic field generator 8 is unevenly distributed forward via the magnetic body 36, so that a strong disturbing magnetic field acts on the unauthorized reading device 300 to prevent skimming. In addition, since the rear disturbing magnetic field is unevenly distributed toward the magnetic body 40, it is possible to prevent the disturbing magnetic field from reaching the magnetic head 29 and the data reading performance from being deteriorated.
　なお、第８実施形態の変形例として、図２と、図１４（ｂ）との組み合わせも可能である。 As a modification of the eighth embodiment, a combination of FIG. 2 and FIG. 14 (b) is also possible.
（第９実施形態）
　図１７は、本発明の第９実施形態を示している。第９実施形態は、第２実施形態または第３実施形態（いずれも図６）と、第５実施形態（図１２）とを組み合わせたものである。すなわち、磁界発生部８の前方には、ループアンテナ３７が設けられるとともに、磁界発生部８の後方には、磁気ヘッド２９と対向して磁性体を含むローラ２７ａが設けられる。その他の構成に関しては、図６および図１２と同じであるので、重複部分の説明を省略する。 (Ninth embodiment)
FIG. 17 shows a ninth embodiment of the present invention. The ninth embodiment is a combination of the second or third embodiment (both are FIG. 6) and the fifth embodiment (FIG. 12). That is, a loop antenna 37 is provided in front of the magnetic field generation unit 8, and a roller 27 a including a magnetic material is provided in the rear of the magnetic field generation unit 8 so as to face the magnetic head 29. Since other configurations are the same as those in FIGS. 6 and 12, description of overlapping portions is omitted.
　第９実施形態によれば、磁界発生部８で発生した妨害磁界が、見掛け上、ループアンテナ３７を介して前方へ偏在することで、不正読取装置３００に強い妨害磁界が作用してスキミングを防止することができ、また、後方の妨害磁界が、ローラ２７ａに向けて偏在することで、磁気ヘッド２９に妨害磁界が及ばなくなり、データの読取性能が低下するのを回避することができる。 According to the ninth embodiment, the disturbing magnetic field generated by the magnetic field generator 8 is apparently unevenly distributed forward via the loop antenna 37, so that a strong disturbing magnetic field acts on the unauthorized reading device 300 to prevent skimming. Further, since the rear disturbing magnetic field is unevenly distributed toward the roller 27a, the disturbing magnetic field does not reach the magnetic head 29, and it is possible to avoid the deterioration of the data reading performance.
　なお、第９実施形態の変形例として、第４実施形態（図１０）と、第５実施形態（図１２）との組み合わせも可能である。 As a modification of the ninth embodiment, a combination of the fourth embodiment (FIG. 10) and the fifth embodiment (FIG. 12) is also possible.
（第１０実施形態）
　図１８は、本発明の第１０実施形態を示している。第１０実施形態は、第２実施形態または第３実施形態（いずれも図６）と、第６実施形態（図１４（ａ））とを組み合わせたものである。すなわち、磁界発生部８の前方には、ループアンテナ３７が設けられるとともに、磁界発生部８の後方には、磁気ヘッド２９と対向して磁性体４０が設けられる。その他の構成に関しては、図６および図１４（ａ）と同じであるので、重複部分の説明を省略する。 (10th Embodiment)
FIG. 18 shows a tenth embodiment of the present invention. The tenth embodiment is a combination of the second embodiment or the third embodiment (both are FIG. 6) and the sixth embodiment (FIG. 14A). That is, a loop antenna 37 is provided in front of the magnetic field generator 8, and a magnetic body 40 is provided in the rear of the magnetic field generator 8 so as to face the magnetic head 29. Since other configurations are the same as those in FIG. 6 and FIG. 14A, the description of the overlapping portions is omitted.
　第１０実施形態によれば、磁界発生部８で発生した妨害磁界が、見掛け上、ループアンテナ３７を介して前方へ偏在することで、不正読取装置３００に強い妨害磁界が作用してスキミングを防止することができ、また、後方の妨害磁界が、磁性体４０に向けて偏在することで、磁気ヘッド２９に妨害磁界が及ばなくなり、データの読取性能が低下するのを回避することができる。 According to the tenth embodiment, the disturbing magnetic field generated by the magnetic field generator 8 is apparently unevenly distributed forward via the loop antenna 37, so that a strong disturbing magnetic field acts on the unauthorized reading device 300 to prevent skimming. Further, since the rear disturbing magnetic field is unevenly distributed toward the magnetic body 40, the disturbing magnetic field does not reach the magnetic head 29, and it is possible to avoid the deterioration of the data reading performance.
　なお、第１０実施形態の変形例として、図６と図１４（ｂ）との組み合わせも可能である。また、図１０と図１４（ａ）との組み合わせ、および、図１０と図１４（ｂ）との組み合わせも可能である。 In addition, as a modification of the tenth embodiment, a combination of FIG. 6 and FIG. 14B is also possible. Moreover, the combination of FIG. 10 and FIG. 14 (a) and the combination of FIG. 10 and FIG.14 (b) are also possible.
（その他の実施形態）
　本発明では、以上述べた実施形態以外にも、種々の実施形態を採用することができる。 (Other embodiments)
In the present invention, various embodiments can be adopted in addition to the embodiments described above.
　例えば、以上述べた各実施形態においては、磁界発生部８を、鉄心と、これに巻回されたコイルとから構成したが、本発明における磁界発生部８はこれのみに限定されない。例えば、磁界発生部８をループアンテナにより構成してもよい。 For example, in each of the embodiments described above, the magnetic field generation unit 8 is constituted by an iron core and a coil wound around the core, but the magnetic field generation unit 8 in the present invention is not limited to this. For example, the magnetic field generator 8 may be configured with a loop antenna.
　また、図２や図６においては、磁界発生部８の前方に設けられる磁性体３６やループアンテナ３７が、パネル２００側に取り付けられる例を挙げたが、カードリーダの構造によっては、磁性体３６やループアンテナ３７を、カードリーダ側に設けてもよい。 In FIGS. 2 and 6, the magnetic body 36 and the loop antenna 37 provided in front of the magnetic field generating unit 8 are attached to the panel 200 side. However, depending on the structure of the card reader, the magnetic body 36 may be used. Alternatively, the loop antenna 37 may be provided on the card reader side.
　また、ループアンテナ３７を設ける実施形態においては、ループアンテナ３７が発生する妨害磁界（２次妨害磁界）の周波数ｆ２を、磁界発生部８が発生する妨害磁界（１次妨害磁界）の周波数ｆ１より低い周波数としてもよい。この場合には、ループアンテナ３７に周波数変換回路が付設される。このようにすると、ループアンテナ３７からは、妨害に適した（フィルタリングが困難な）低周波の磁界が発生するので、スキミングを効果的に防止することができる。また、磁界発生部８からは、遠距離まで伝播が可能な高周波の磁界が発生するので、ループアンテナ３７と磁界発生部８との距離が長くても、磁界発生部８からループアンテナ３７へ確実に磁界を伝達することができる。 In the embodiment in which the loop antenna 37 is provided, the frequency f2 of the disturbing magnetic field (secondary disturbing magnetic field) generated by the loop antenna 37 is set to be higher than the frequency f1 of the disturbing magnetic field (primary disturbing magnetic field) generated by the magnetic field generating unit 8. It may be a low frequency. In this case, a frequency conversion circuit is attached to the loop antenna 37. In this way, the loop antenna 37 generates a low-frequency magnetic field suitable for interference (which is difficult to filter), and therefore skimming can be effectively prevented. Further, since the magnetic field generation unit 8 generates a high-frequency magnetic field that can be propagated to a long distance, even if the distance between the loop antenna 37 and the magnetic field generation unit 8 is long, the magnetic field generation unit 8 can reliably connect to the loop antenna 37. Can transmit a magnetic field.
　また、以上の説明では、カード２１が挿入される場合のスキミング対策について述べたが、磁界発生部８から妨害磁界が常時発生していることから、カード２１が返却される場合にも、スキミングを防止することができる。 Further, in the above description, the countermeasure for skimming when the card 21 is inserted has been described. However, since the disturbing magnetic field is constantly generated from the magnetic field generator 8, the skimming is performed even when the card 21 is returned. Can be prevented.
　なお、妨害磁界を常時発生させることは、本発明にとって必須ではなく、妨害磁界に休止期間を設けるようにしてもよい。 Note that it is not essential for the present invention to always generate the disturbing magnetic field, and a pause period may be provided for the disturbing magnetic field.
　また、以上の説明では、パネル２００の前面に取り付けられた不正読取装置３００に対するスキミングと、磁気ストライプ検出用の磁気ヘッド３４に対するスキミングの各対策について述べた。一方、磁気データ読取用の磁気ヘッド２９に対するスキミング対策としては、例えば、磁気ヘッド２９で読み取ったデータを暗号化するなどの対策がとられる。 Further, in the above description, each countermeasure for skimming for the illegal reading device 300 attached to the front surface of the panel 200 and skimming for the magnetic head 34 for detecting the magnetic stripe has been described. On the other hand, as a countermeasure against skimming for the magnetic head 29 for reading magnetic data, for example, a countermeasure such as encryption of data read by the magnetic head 29 is taken.
　また、以上の各実施形態においては、磁気記録媒体として、裏面に磁気ストライプのある磁気カードを例に挙げた。しかしながら、本発明は、磁気ストライプが表面もしくは表裏両面にある磁気カードを扱う磁気記録媒体読取装置にも適用することができる。 In each of the above embodiments, a magnetic card having a magnetic stripe on the back surface is taken as an example of the magnetic recording medium. However, the present invention can also be applied to a magnetic recording medium reading apparatus that handles a magnetic card having magnetic stripes on the front surface or both surfaces.
　また、以上の各実施形態においては、磁気記録媒体として磁気カードを例に挙げた。しかしながら、本発明は、磁気カードに限らず、磁気ストライプを有する通帳のような磁気記録媒体を読み取る装置にも適用することができる。 In each of the above embodiments, a magnetic card is taken as an example of the magnetic recording medium. However, the present invention can be applied not only to a magnetic card but also to an apparatus for reading a magnetic recording medium such as a passbook having a magnetic stripe.
　本発明は、ＡＴＭのような自動取引処理装置に搭載されるカードリーダや通帳リーダ、あるいはカード認証端末に搭載されるカードリーダなど、磁気記録媒体を読み取る装置全般に適用することができる。 The present invention can be applied to all devices for reading a magnetic recording medium, such as a card reader or passbook reader installed in an automatic transaction processing apparatus such as ATM, or a card reader installed in a card authentication terminal.
　　１　　　カードリーダ
　　４　　　カード搬送部
　　８　　　磁界発生部
　　９　　　磁界制御部
　　２１　　磁気カード
　　２２　　挿入口
　　２７ａ　ローラ
　　２９　　磁気ヘッド
　　３６　　磁性体
　　３７　　ループアンテナ
　　３８　　磁性体
　　４０、４０ａ、４０ｂ　磁性体 DESCRIPTION OF SYMBOLS 1 Card reader 4 Card conveyance part 8 Magnetic field generation part 9 Magnetic field control part 21 Magnetic card 22 Insertion slot 27a Roller 29 Magnetic head 36 Magnetic body 37 Loop antenna 38 Magnetic body 40, 40a, 40b Magnetic body

Claims (11)

  1. 　磁気記録媒体が挿入される挿入口と、
    　前記挿入口から挿入された磁気記録媒体を搬送する搬送手段と、
    　前記搬送手段により搬送される磁気記録媒体からデータを読み取る磁気ヘッドと、
    　前記挿入口付近に設けられ、当該挿入口の前方に取り付けられる不正読取装置によって前記磁気記録媒体のデータが読み取られるのを妨害する妨害磁界を発生する磁界発生部と、を備えた磁気記録媒体読取装置において、
    　前記磁界発生部から発生する妨害磁界を偏在させて、前記磁気ヘッドに及ばないようにするための磁性体またはループアンテナを設けたことを特徴とする磁気記録媒体読取装置。     An insertion slot into which a magnetic recording medium is inserted;
    Conveying means for conveying the magnetic recording medium inserted from the insertion port;
    A magnetic head for reading data from a magnetic recording medium conveyed by the conveying means;
    A magnetic recording medium reading comprising: a magnetic field generation unit that generates a disturbing magnetic field that is provided in the vicinity of the insertion port and prevents data from being read from the magnetic recording medium by an unauthorized reading device attached in front of the insertion port. In the device
    A magnetic recording medium reading device comprising a magnetic body or a loop antenna for unevenly distributing a disturbing magnetic field generated from the magnetic field generation unit so as not to reach the magnetic head.
  2. 　請求項１に記載の磁気記録媒体読取装置において、
    　前記磁界発生部の前方に前記磁性体が設けられており、
    　前記磁界発生部から発生する妨害磁界が、前記磁性体を介して前方へ偏在することを特徴とする磁気記録媒体読取装置。     The magnetic recording medium reader according to claim 1,
    The magnetic body is provided in front of the magnetic field generator,
    The magnetic recording medium reading device, wherein the disturbing magnetic field generated from the magnetic field generating unit is unevenly distributed forward through the magnetic body.
  3. 　請求項１に記載の磁気記録媒体読取装置において、
    　前記磁界発生部の前方に前記ループアンテナが設けられており、
    　前記磁界発生部から発生する妨害磁界に基づき、電磁誘導により前記ループアンテナに更に妨害磁界が発生することによって、妨害磁界が前方へ偏在することを特徴とする磁気記録媒体読取装置。     The magnetic recording medium reader according to claim 1,
    The loop antenna is provided in front of the magnetic field generator,
    A magnetic recording medium reading device, wherein a disturbing magnetic field is unevenly distributed forward by further generating a disturbing magnetic field in the loop antenna by electromagnetic induction based on the disturbing magnetic field generated from the magnetic field generator.
  4. 　請求項１に記載の磁気記録媒体読取装置において、
    　前記磁界発生部の前方に前記ループアンテナが設けられており、
    　前記磁界発生部から発生する妨害磁界に基づき、磁気共鳴により前記ループアンテナに更に妨害磁界が発生することによって、妨害磁界が前方へ偏在することを特徴とする磁気記録媒体読取装置。     The magnetic recording medium reader according to claim 1,
    The loop antenna is provided in front of the magnetic field generator,
    A magnetic recording medium reading device, wherein a disturbing magnetic field is unevenly distributed forward by further generating a disturbing magnetic field in the loop antenna by magnetic resonance based on the disturbing magnetic field generated from the magnetic field generator.
  5. 　請求項３または請求項４に記載の磁気記録媒体読取装置において、
    　前記ループアンテナに磁性体が挿入されていることを特徴とする磁気記録媒体読取装置。     The magnetic recording medium reading device according to claim 3 or 4,
    A magnetic recording medium reading device, wherein a magnetic material is inserted into the loop antenna.
  6. 　請求項３ないし請求項５のいずれかに記載の磁気記録媒体読取装置において、
    　前記ループアンテナが発生する妨害磁界の周波数は、前記磁界発生部が発生する妨害磁界の周波数よりも低い周波数であることを特徴とする磁気記録媒体読取装置。     The magnetic recording medium reader according to any one of claims 3 to 5,
    The magnetic recording medium reader according to claim 1, wherein the frequency of the disturbing magnetic field generated by the loop antenna is lower than the frequency of the disturbing magnetic field generated by the magnetic field generator.
  7. 　請求項１に記載の磁気記録媒体読取装置において、
    　前記磁界発生部の後方に前記磁性体が設けられており、
    　前記磁性体は、前記磁気ヘッドの近傍に配置されていることを特徴とする磁気記録媒体読取装置。     The magnetic recording medium reader according to claim 1,
    The magnetic body is provided behind the magnetic field generator,
    The magnetic recording medium reading device, wherein the magnetic body is disposed in the vicinity of the magnetic head.
  8. 　請求項７に記載の磁気記録媒体読取装置において、
    　前記磁性体は、前記磁気ヘッドと対向して設けられたローラの一部であることを特徴とする磁気記録媒体読取装置。     The magnetic recording medium reader according to claim 7,
    The magnetic recording medium reading device, wherein the magnetic body is a part of a roller provided to face the magnetic head.
  9. 　請求項７に記載の磁気記録媒体読取装置において、
    　前記磁性体は、前記磁気ヘッドと対向して、当該磁気ヘッドの片側または両側に配置されていることを特徴とする磁気記録媒体読取装置。     The magnetic recording medium reader according to claim 7,
    The magnetic recording medium reading device, wherein the magnetic body is disposed on one side or both sides of the magnetic head so as to face the magnetic head.
  10. 　請求項１に記載の磁気記録媒体読取装置において、
    　前記磁性体が、前記磁界発生部の前方および後方に設けられていることを特徴とする磁気記録媒体読取装置。     The magnetic recording medium reader according to claim 1,
    The magnetic recording medium reading device, wherein the magnetic body is provided in front of and behind the magnetic field generator.
  11. 　請求項１に記載の磁気記録媒体読取装置において、
    　前記ループアンテナが、前記磁界発生部の前方に設けられており、
    　前記磁性体が、前記磁界発生部の後方に設けられていることを特徴とする磁気記録媒体読取装置。     The magnetic recording medium reader according to claim 1,
    The loop antenna is provided in front of the magnetic field generator;
    The magnetic recording medium reading device, wherein the magnetic body is provided behind the magnetic field generator.
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