JP5807123B2 - Magnetic recording medium reader - Google Patents

Description

  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.

  A transaction reader such as an ATM (Automated Teller Machine) or a CD (Cash Dispenser) is equipped with a card reader that reads a magnetic card. 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.

  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.

  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.

  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.

  FIG. 20 shows an example of a card reader provided 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 card insertion detection sensor 23 that detects the inserted card 21, a magnetic head 34 that detects the magnetic stripe of the card 21, and a disturbing magnetic field generator 35 that generates a disturbing magnetic field are provided near the insertion slot 22. ing.

  Inside the housing 100 are provided transport rollers 25 to 28 for transporting the card 21, card position detection sensors 30 to 33 for detecting the position of the card 21, a magnetic head 29 for reading data of the magnetic card 21, and the like. . 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

  In the card reader 1 shown in FIG. 20, in order to reliably prevent skimming in the unauthorized reading device 300, the stronger the intensity of the disturbing magnetic field, the stronger the intensity of the magnetic field generated on the rear side of the disturbing magnetic field generator 35. 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.

  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.

  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. Yes. In addition, a magnetic body is arranged below the magnetic head so that the disturbing magnetic field generated from the magnetic field generator is unevenly distributed so as not to reach the magnetic head.

  By doing so, the disturbing magnetic field generated rearward from the magnetic field generating unit is unevenly distributed so as to pass through the magnetic body disposed on the lower side of the magnetic head, 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.

  In the present invention, the magnetic body may be disposed below and on the side of the magnetic head.

  According to this, since the disturbing magnetic field of the magnetic field generating part is unevenly distributed not only on the lower side but also on the side, the disturbing magnetic field is more difficult to reach the magnetic head.

  In this case, the magnetic body includes a first magnetic body disposed on the lower side of the magnetic head and a second magnetic body disposed on the side of the magnetic head, and the first magnetic body includes the magnetic head. The second magnetic body may be disposed near the end of the first magnetic body on the side away from the magnetic head.

  Due to the installation space of the magnetic body, the first magnetic body may be inevitably arranged to face the magnetic head obliquely. In this case, since the distance between the first magnetic body and the magnetic head increases at the end of the first magnetic body on the side away from the magnetic head, the magnetic head may be affected by the disturbing magnetic field. However, if the second magnetic body is disposed in the vicinity of the end portion of the first magnetic body, the disturbing magnetic field is induced by the second magnetic body and is unevenly distributed, so that the disturbing magnetic field does not easily reach the magnetic head.

  In the present invention, a holding member that holds the first and second magnetic bodies is provided, and the holding member has a first holding portion that holds the first magnetic body and a second holding the second magnetic body. The first holding part and the second holding part may be integrally formed so as to form a predetermined angle.

  According to this, the first magnetic body and the second magnetic body are simply held by the first holding portion of the holding member and the second magnetic body is held by the second holding portion of the holding member. The magnetic body can be positioned at a predetermined angle, and the efficiency of assembly work can be improved.

  In the present invention, the first holding portion of the holding member has a first engaging portion that engages with the first magnetic body, and the second holding portion engages with the second magnetic body. You may have two engaging parts.

  According to this, by engaging the first magnetic body with the first engaging portion of the holding member and engaging the second magnetic body with the second engaging portion of the holding member, It can be easily attached to the holding member.

  In the present invention, the holding member may include a fixing piece for fixing to the apparatus main body and a stopper piece for restricting the movement of the holding member.

  According to this, when the holding member is fixed to the apparatus main body by the fixing piece, the movement of the holding member is restricted by the stopper piece, so that the holding member can be fixed to the apparatus main body in a stable state.

  In the present invention, the first and second magnetic bodies may be noise shielding ferrite cores attached to a flat cable.

  According to this, it is not necessary to design and manufacture a magnetic body as a dedicated component, and a commercially available general-purpose component that can be easily obtained can be used. As a result, the manufacturing cost can be kept low.

  In the present invention, the magnetic body may be arranged in at least one place on the upper side, side, front, and rear of the magnetic head.

  According to this, it is possible to arrange the magnetic body at an optimum place according to the situation such as parts and spaces existing around the magnetic head.

  In the present invention, the magnetic body may be arranged to be inclined with respect to the magnetic head so that the disturbing magnetic field generated from the magnetic field generator is unevenly distributed in the direction away from the magnetic head.

  According to this, since the disturbing magnetic field of the magnetic field generating part is unevenly distributed in the direction away from the magnetic head, the disturbing magnetic field is more difficult to reach the magnetic head.

  According to the present invention, even if a strong disturbing magnetic field is applied to an unauthorized reading device, the disturbing magnetic field does not reach the magnetic head, so that it is possible to provide a magnetic recording medium reading device in which the data reading performance does not deteriorate.

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 arrangement of magnetic bodies and the uneven distribution of disturbing magnetic fields 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 a card reader according to a modification of the first embodiment. FIG. 7 is a side sectional view of the card reader according to the second embodiment. FIG. 8 is a diagram showing the arrangement of magnetic bodies and the uneven distribution of disturbing magnetic fields in the second embodiment. FIG. 9 is a diagram showing another example of the arrangement of magnetic bodies and the uneven distribution of disturbing magnetic fields in the second embodiment. FIG. 10 is a perspective view of the card reader as seen from the back side. FIG. 11 is a plan view of the card reader as seen from the back side. 12 is a cross-sectional view taken along the line X-X and the line Y-Y in FIG. 11. FIG. 13 is an exploded view of the magnetic body and the holding member. FIG. 14 is an assembly diagram of the magnetic body and the holding member. FIG. 15 is a diagram showing the arrangement of magnetic bodies and the uneven distribution of disturbing magnetic fields in the third embodiment. FIG. 16 is a diagram showing another example of the arrangement of the magnetic bodies and the uneven distribution of the disturbing magnetic field in the third embodiment. FIG. 17 is a diagram showing the arrangement of magnetic bodies and the uneven distribution of disturbing magnetic fields in the fourth embodiment. FIG. 18 is a diagram showing another example of the arrangement of magnetic bodies and the uneven distribution of disturbing magnetic fields in the fourth embodiment. FIG. 19 is a diagram showing the arrangement of magnetic bodies and the uneven distribution of disturbing magnetic fields in the fifth embodiment. FIG. 20 is a side sectional view of a conventional card reader.

  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.

(First embodiment)
First, the configuration of the card reader according to the first embodiment will be described with reference to FIG. 1 and FIG. 2, F represents the forward direction, B represents the backward direction, L represents the left direction, R represents the right direction, U represents the upward direction, and D represents the downward direction (the same applies to the following drawings).

  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.

  The control unit 2 includes a magnetic field control unit 9 that controls the magnetic field generation unit 8 and a card transport control unit 12 that controls the card transport 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. The configuration of FIG. 1 is common to the embodiments described later.

  As shown in FIG. 2A, 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 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.

  The magnetic field generation unit 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.

  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 constitute the card conveyance unit 4 (FIG. 1) together with the conveyance belt and the motor. 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 portion and a light receiving portion that face each other with the transport 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, whereas the magnetic head 29 is a magnetic head for reproducing the data itself recorded on the magnetic stripe. Head. A magnetic body 40 is provided on the lower side (D direction) of the magnetic head 29. The magnetic body 40 is made of a material having high magnetic permeability such as ferrite or iron.

  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. The card reader 1 constitutes a magnetic recording medium reader of the present invention.

  Next, as shown in FIG. 2A, a countermeasure against skimming when an unauthorized reading device 300 including a magnetic head is attached to the front surface of the panel 200 will be described.

  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. The disturbing magnetic field generated by the magnetic field generator 8 extends forward (F 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.

  On the other hand, the disturbing magnetic field generated by the magnetic field generator 8 is also present behind the magnetic field generator 8 (direction B). However, since the magnetic body 40 is disposed below the magnetic head 29, the disturbing magnetic field M is unevenly distributed so as to pass through the magnetic body 40 as shown in FIG. Therefore, the disturbing magnetic field M 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 disturbing magnetic field M.

  As shown in FIG. 4B, the magnetic body 40 may be disposed to be inclined toward the D direction with respect to the magnetic head 29 (with respect to the FB direction). As a result, the disturbing magnetic field M is unevenly distributed in a direction further away from the magnetic head 29, so that the disturbing magnetic field M is less likely to reach the magnetic head 29.

  Thus, according to the first embodiment, skimming can be prevented by applying the disturbing magnetic field generated from the magnetic field generator 8 to the unauthorized reading device 300 attached to the front surface of the panel 200. it can. On the other hand, since the magnetic body 40 is disposed below the magnetic head 29, the disturbing magnetic field generated by the magnetic field generator 8 is less likely to reach the magnetic head 29 in the card reader 1, so that the data reading performance is improved. It is possible to avoid the decrease.

  Further, 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. 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 this pattern change (the same applies to the following embodiments).

  In the card reader 1 described above, as shown in FIG. 6, a magnetic body 36 may be disposed between the panel 200 and the card insertion slot unit 24 in front of the magnetic field generator 8 (the following embodiments). But the same). Like the magnetic body 40, the magnetic body 36 is made of a material having high magnetic permeability such as ferrite and iron. The magnetic body 36 is attached to a support member (not shown) provided on the panel 200, for example. Instead of the magnetic body 36, a loop antenna may be arranged.

  When such a magnetic body 36 is provided, the disturbing magnetic field generated by the magnetic field generator 8 is guided to the magnetic body 36 serving as a kind of waveguide and extends forward, so that a strong disturbing magnetic field acts on the unauthorized reading device 300. be able to. For this reason, skimming by the unauthorized reading device 300 can be more effectively prevented.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.

  FIG. 7 shows a card reader 1 according to the second embodiment. In the first embodiment (FIG. 2), the magnetic body 40 is provided below the magnetic head 29. On the other hand, in the second embodiment, the magnetic body 40 is provided on the side of the magnetic head 29. 7A, the magnetic body 40 is provided on the front side of the magnetic head 29, and in FIG. 7B, the magnetic body 40 is provided on the other side of the magnetic head 29.

  The distribution of the disturbing magnetic field in the second embodiment is as shown in FIG. FIG. 8 is a view of the magnetic head 29 as viewed from above. In FIG. 8A, the magnetic body 40 is provided on the side of the magnetic head 29 in the L direction, and the disturbing magnetic field M is unevenly distributed in the L direction through the magnetic body 40. In FIG. 8B, the magnetic body 40 is provided on the side of the magnetic head 29 in the R direction, and the disturbing magnetic field M is unevenly distributed in the R direction through the magnetic body 40. In FIG. 8C, the magnetic body 40 is provided on each side of the magnetic head 29 in the L direction and the R direction, and the disturbing magnetic field M is unevenly distributed in the L direction and the R direction through these magnetic bodies 40. doing.

  Thus, according to the second embodiment, skimming can be prevented by applying the disturbing magnetic field generated from the magnetic field generator 8 to the unauthorized reading device 300 attached to the front surface of the panel 200. it can. On the other hand, since the magnetic body 40 is arranged on the side of the magnetic head 29, the disturbing magnetic field generated in the magnetic field generator 8 is less likely to reach the magnetic head 29 in the card reader 1, so that the data reading performance is improved. It is possible to avoid the decrease.

  In FIG. 8, the magnetic body 40 is arranged in parallel with the magnetic body 40. However, as shown in FIG. 9, the magnetic body 40 may be arranged inclined with respect to the magnetic head 29. As a result, the disturbing magnetic field M can be unevenly distributed in a direction further away from the magnetic head 29, so that the disturbing magnetic field M is less likely to reach the magnetic head 29.

  Next, an example of the card reader 1 using both the first embodiment and the second embodiment will be described with reference to FIGS.

  FIG. 10 is a perspective view of the card reader 1 viewed from the back side, and FIG. 11 is a plan view of the card reader 1 viewed from the back side. In both figures, some parts are not shown. An XX sectional view of FIG. 11 is shown in FIG. 12A, and a YY sectional view of FIG. 11 is shown in FIG. 12B.

  10 to 12, a magnetic head 29 and a plurality of transport rollers 61 are provided inside the housing 100. As shown in FIG. 12, the magnetic head 29 protrudes from the opening 60 formed in the housing 100 in the U direction (upper side) and faces the conveyance path P. The conveyance roller 61 also protrudes from the opening 62 (see FIGS. 10 and 11) formed in the housing 100 in the U direction (upper side) and faces the conveyance path P.

  In the vicinity of the magnetic head 29, two magnetic bodies 41 and 42 for causing the disturbing magnetic field to be unevenly distributed are arranged. As shown in FIG. 12B, the magnetic body 41 (first magnetic body) is located on the lower side (D direction) of the magnetic head 29, and the magnetic body 42 (second magnetic body) is It is located on the side (L direction) of the magnetic head 29. These magnetic bodies 41 and 42 are held by a holding member 50 made of a resin molded product.

  As shown in FIG. 13, the holding member 50 includes a holding portion 51 (first holding portion) that holds the magnetic body 41, a holding portion 52 (second holding portion) that holds the magnetic body 42, and a holding member. A fixing piece 53 for fixing 50 to the card reader body and a stopper piece 54 for restricting the movement of the holding member 50 are provided. The holding part 51 and the holding part 52 are integrally formed so as to form a predetermined angle. The holding portion 51 is formed with a pair of engaging portions 51 a and 51 b (first engaging portions) that engage with the magnetic body 41, and the holding portion 52 includes three pieces that engage with the magnetic body 42. Engagement parts 52a, 52b, 52c (second engagement parts) are formed.

  The magnetic bodies 41 and 42 are made of a commercially available ferrite core for noise shielding attached to a flat cable. For this reason, the magnetic body 41 has a flat shape, and a through hole 41a through which a flat cable (not shown) is inserted is formed at the center. Similarly, the magnetic body 42 has a flat shape and is formed with a through hole 42a through which a flat cable is inserted.

  The magnetic body 41 is held as shown in FIG. 14 by engaging one opening end of the through hole 41a with the engaging portion 51a and engaging the other opening end of the through hole 41a with the engaging portion 51b. Held in the part 51. As shown in FIG. 14, the magnetic body 42 has one open end of the through hole 42a engaged with the engaging portions 52a and 52b and the other open end of the through hole 42a engaged with the engaging portion 52c. Is held by the holding unit 52. 14A is a view of the holding member 50 as viewed obliquely from above, and FIG. 14B is a view of the holding member 50 as viewed from the side.

  By the way, as shown in FIG. 12B, the magnetic body 41 is disposed so as to face the magnetic head 29 obliquely, and the end of the magnetic body 41 on the side away from the magnetic head 29 (L direction side). A magnetic body 42 is disposed in the vicinity of 41b. The reason why the magnetic body 41 is disposed obliquely is to avoid interference with other members (not shown) in the installation space of the magnetic body 41.

  In this case, since the distance between the magnetic body 41 and the magnetic head 29 is short at the end 41c on the R direction side of the magnetic body 41, the disturbing magnetic field is unevenly distributed so as to pass through the magnetic body 41. At the end 41b on the direction side, the distance between the magnetic body 41 and the magnetic head 29 increases, so that the effect of the magnetic body 41 inducing the disturbing magnetic field is not sufficiently exerted, and the magnetic head 29 is affected by the disturbing magnetic field. there is a possibility. However, by arranging the magnetic body 42 in the vicinity of the end 41 b on the L direction side of the magnetic body 41, the disturbing magnetic field is induced and unevenly distributed to the magnetic body 42, so that the disturbing magnetic field does not reach the magnetic head 29.

  10 to 14 described above, since the disturbing magnetic field is unevenly distributed not only on the lower side but also on the side, the disturbing magnetic field is more difficult to reach the magnetic head 29. Moreover, each magnetic body 41 and 42 can be easily attached to the holding member 50 by engagement. Furthermore, since the holding portions 51 and 52 are integrally formed with the holding member 50 so as to form a predetermined angle, the magnetic bodies 41 and 42 are simply held by the holding portions 51 and 52, respectively. 42 can be positioned at a predetermined angle, and the efficiency of assembly work can be improved.

  Further, when the holding member 50 is fixed to the card reader main body by the fixing piece 53, the movement of the holding member 50 is regulated by bringing the stopper piece 54 into contact with a part of the main body. It can be fixed to the reader body in a stable state.

  Furthermore, as the magnetic bodies 41 and 42, a ferrite core for noise shielding mounted on a flat cable is used, so there is no need to design and manufacture a magnetic body as a dedicated part, and a commercially available general-purpose part that can be easily obtained. As a result, the manufacturing cost can be kept low.

(Third embodiment)
Next, a third embodiment of the present invention will be described. The overall configuration of the card reader according to the third embodiment is the same as that shown in FIG.

  FIG. 15 shows the arrangement of the magnetic body 40 and the uneven distribution of the disturbing magnetic field in the third embodiment, and is a view of the magnetic head 29 as viewed from above. In FIG. 15, the magnetic body 40 is provided in front of the magnetic head 29 (F direction).

  Specifically, in FIG. 15A, the magnetic body 40 is disposed at an obliquely forward position on the F direction side and the L direction side when viewed from the magnetic head 29. And the magnetic body 40 is inclined and provided in the L direction side with respect to the FB direction. As a result, the disturbing magnetic field M is unevenly distributed in the direction away from the magnetic head 29 by being guided to the magnetic body 40 (L direction) and does not reach the magnetic head 29.

  In FIG. 15B, the magnetic body 40 is disposed at an obliquely forward position on the F direction side and the R direction side when viewed from the magnetic head 29. And the magnetic body 40 is inclined and provided in the R direction side with respect to the FB direction. Thereby, the disturbing magnetic field M is unevenly distributed in a direction (R direction) away from the magnetic head 29 by being guided to the magnetic body 40 and does not reach the magnetic head 29.

  In FIG. 15C, the magnetic body 40 is disposed at an obliquely forward position on the F direction side and on both the L direction side and the R direction side when viewed from the magnetic head 29. And the magnetic body 40 is inclined and provided in the L direction side and the R direction side with respect to the FB direction. Thereby, the disturbing magnetic field M is unevenly distributed in directions (L direction and R direction) away from the magnetic head 29 by being guided by the two magnetic bodies 40 and does not reach the magnetic head 29.

  FIG. 16 shows another example of the arrangement of the magnetic body 40. FIG. 16A is a diagram of the magnetic head 29 viewed from the side. FIG. 16B is a view of the magnetic head 29 as viewed from above. The magnetic body 40 is disposed at an obliquely forward position on the F direction side and the D direction side when viewed from the magnetic head 29. And the magnetic body 40 is inclined and provided in the D direction side with respect to the FB direction. As a result, the disturbing magnetic field M is unevenly distributed in a direction (D direction) that is guided to the magnetic body 40 and away from the magnetic head 29, and does not reach the magnetic head 29.

  As shown by a broken line in FIG. 16A, the magnetic body 40 is disposed at an obliquely forward position on the F direction side and the U direction side when viewed from the magnetic head 29, and with respect to the FB direction. You may incline and provide in the U direction side. In this case, the disturbing magnetic field is unevenly distributed in the U direction and does not reach the magnetic head 29. Further, the magnetic body 40 may be disposed at an obliquely forward position on the F direction side and on both the D direction side and the U direction side when viewed from the magnetic head 29.

  As described above, according to the third embodiment, skimming is performed by applying the disturbing magnetic field generated from the magnetic field generation unit 8 to the unauthorized reading device 300 (FIG. 2) attached to the front surface of the panel 200. Can be prevented. On the other hand, since the magnetic body 40 is disposed obliquely in front of the magnetic head 29, the disturbing magnetic field generated by the magnetic field generator 8 is less likely to reach the magnetic head 29 in the card reader 1, so that data reading performance is achieved. Can be avoided.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. The overall configuration of the card reader according to the fourth embodiment is the same as that shown in FIG.

  FIG. 17 shows the arrangement of the magnetic body 40 and the uneven distribution of the disturbing magnetic field in the fourth embodiment, and is a view of the magnetic head 29 as viewed from above. In FIG. 17, the magnetic body 40 is provided behind the magnetic head 29 (B direction).

  Specifically, in FIG. 17A, the magnetic body 40 is disposed at an obliquely rearward position on the B direction side and the L direction side when viewed from the magnetic head 29. And the magnetic body 40 is inclined and provided in the L direction side with respect to the FB direction. As a result, the disturbing magnetic field M is unevenly distributed in the direction away from the magnetic head 29 by being guided to the magnetic body 40 (L direction) and does not reach the magnetic head 29.

  In FIG. 17B, the magnetic body 40 is disposed at an obliquely rear position on the B direction side and the R direction side as viewed from the magnetic head 29. And the magnetic body 40 is inclined and provided in the R direction side with respect to the FB direction. Thereby, the disturbing magnetic field M is unevenly distributed in a direction (R direction) away from the magnetic head 29 by being guided to the magnetic body 40 and does not reach the magnetic head 29.

  In FIG. 17C, the magnetic body 40 is disposed on the B direction side and obliquely rearward positions on both the L direction side and the R direction side when viewed from the magnetic head 29. And the magnetic body 40 is inclined and provided in the L direction side and the R direction side with respect to the FB direction. Thereby, the disturbing magnetic field M is unevenly distributed in directions (L direction and R direction) away from the magnetic head 29 by being guided by the two magnetic bodies 40 and does not reach the magnetic head 29.

  FIG. 18 shows another example of the arrangement of the magnetic body 40. FIG. 18A shows the magnetic head 29 as viewed from the side. FIG. 18B is a view of the magnetic head 29 as viewed from above. The magnetic body 40 is disposed at an obliquely rear position on the B direction side and the D direction side when viewed from the magnetic head 29. And the magnetic body 40 is inclined and provided in the D direction side with respect to the FB direction. As a result, the disturbing magnetic field M is unevenly distributed in a direction (D direction) that is guided to the magnetic body 40 and away from the magnetic head 29, and does not reach the magnetic head 29.

  As shown by a broken line in FIG. 18A, the magnetic body 40 is disposed at an obliquely rearward position on the B direction side and the U direction side when viewed from the magnetic head 29, and with respect to the FB direction. You may incline and provide in the U direction side. In this case, the disturbing magnetic field is unevenly distributed in the U direction and does not reach the magnetic head 29. Further, the magnetic body 40 may be disposed at an oblique rear position on the B direction side and on both the D direction side and the U direction side when viewed from the magnetic head 29.

  Thus, according to the fourth embodiment, skimming is performed by applying the disturbing magnetic field generated from the magnetic field generator 8 to the unauthorized reading device 300 (FIG. 2) attached to the front surface of the panel 200. Can be prevented. On the other hand, since the magnetic body 40 is disposed obliquely behind the magnetic head 29, the disturbing magnetic field generated by the magnetic field generator 8 does not easily reach the magnetic head 29 in the card reader 1, so that data reading performance is achieved. Can be avoided.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described. The overall configuration of the card reader according to the fifth embodiment is the same as that shown in FIG.

  FIG. 19 shows the arrangement of the magnetic body 40 and the uneven distribution of the disturbing magnetic field in the fifth embodiment, and is a view of the magnetic head 29 as viewed from the side. In FIG. 19, the magnetic body 40 is provided on the upper side (U direction) of the magnetic head 29.

  Specifically, in FIG. 19A, the magnetic body 40 is disposed at a position facing the magnetic head 29 with the conveyance path P interposed therebetween. As a result, the disturbing magnetic field M is unevenly distributed in a direction (U direction) away from the magnetic head 29 by being guided to the magnetic body 40 and does not reach the magnetic head 29. In addition, you may provide the magnetic body 40 inclining to the U direction side with respect to FB direction. In this case, the disturbing magnetic field M is more difficult to reach the magnetic head 29. Further, as shown in FIG. 19B, the magnetic body 40 may be provided on both the upper side (U direction) and the lower side (D direction) of the magnetic head 29. Also in this case, the magnetic body 40 may be provided to be tilted toward the U direction and the D direction with respect to the FB direction.

  As described above, according to the fifth embodiment, skimming is performed by applying the disturbing magnetic field generated from the magnetic field generation unit 8 to the unauthorized reading device 300 (FIG. 2) attached to the front surface of the panel 200. Can be prevented. On the other hand, since the magnetic body 40 is arranged on the upper side of the magnetic head 29, the disturbing magnetic field generated in the magnetic field generator 8 is less likely to reach the magnetic head 29 in the card reader 1, so that the data reading performance is deteriorated. Can be avoided.

(Other embodiments)
In the present invention, various embodiments can be adopted in addition to the embodiments described above. For example, regarding the arrangement of the magnetic body 40, the arrangements of the first to fifth embodiments can be arbitrarily combined. Therefore, the magnetic body 40 may be disposed in at least one place on the lower side, upper side, side, front, and rear of the magnetic head 29. As a result, the magnetic body 40 can be arranged at an optimum location according to the situation such as parts and spaces existing around the magnetic head 29.

  In the embodiment shown in FIGS. 10 to 14, the magnetic bodies 41 and 42 are configured from separate parts, but a single L-shaped or V-shaped magnetic body that integrates them may be used.

  Moreover, in each embodiment described above, although the magnetic field generation part 8 was comprised from the iron core and the coil wound around this, the magnetic field generation part 8 in this invention is not limited only to this. For example, the magnetic field generator 8 may be configured with a loop antenna.

  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. 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.

  In the above description, the countermeasures for skimming for the illegal reading device 300 attached to the front surface of the panel 200 and for skimming for the magnetic head 34 for detecting the magnetic stripe are 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.

  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.

  In each of the above embodiments, a magnetic card is used 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.

  The present invention can be applied to all devices that read magnetic recording media, such as card readers and passbook readers mounted on automatic transaction processing devices such as ATMs, or card readers mounted on card authentication terminals.

DESCRIPTION OF SYMBOLS 1 Card reader 4 Card conveyance part 8 Magnetic field generation part 21 Magnetic card 22 Insertion slot 29 Magnetic head 40,41,42 Magnetic body 41b End part 50 Holding member 51,52 Holding part 51a, 51b, 52a, 52b, 52c Engagement part 53 Fixed piece 54 Stopper piece M Disturbance magnetic field

Claims (8)

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 opening and prevents data from being read from the magnetic recording medium by an unauthorized reading device attached in front of the insertion opening. In the device
A magnetic body is provided for unevenly distributing the disturbing magnetic field generated from the magnetic field generation unit so as not to reach the magnetic head,
The magnetic body is a ferrite core for noise shielding attached to a flat cable,
A magnetic recording medium reading device, wherein the magnetic body is disposed below the magnetic head. 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 opening and prevents data from being read from the magnetic recording medium by an unauthorized reading device attached in front of the insertion opening. In the device
A magnetic body is provided for unevenly distributing the disturbing magnetic field generated from the magnetic field generation unit so as not to reach the magnetic head,
The magnetic body is a ferrite core for noise shielding attached to a flat cable,
A magnetic recording medium reading apparatus, wherein the magnetic body is disposed below and to the side of the magnetic head. The magnetic recording medium reader according to claim 2,
The magnetic body includes a first magnetic body disposed on the lower side of the magnetic head and a second magnetic body disposed on a side of the magnetic head,
The first magnetic body is disposed so as to face the magnetic head obliquely,
The magnetic recording medium reading device, wherein the second magnetic body is disposed in the vicinity of an end of the first magnetic body on the side away from the magnetic head. The magnetic recording medium reader according to claim 3.
A holding member for holding the first and second magnetic bodies;
The holding member has a first holding part that holds the first magnetic body, and a second holding part that holds the second magnetic body,
The magnetic recording medium reading device, wherein the first holding unit and the second holding unit are integrally formed so as to form a predetermined angle. The magnetic recording medium reader according to claim 4,
The first holding portion has a first engaging portion that engages with the first magnetic body,
The magnetic recording medium reading device, wherein the second holding portion has a second engaging portion that engages with the second magnetic body. The magnetic recording medium reader according to claim 4,
The magnetic recording medium reading device, wherein the holding member includes a fixing piece for fixing to the apparatus main body and a stopper piece for restricting the movement of the holding member. 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 generating unit that generates a disturbing magnetic field that is provided in the vicinity of the insertion slot and prevents data from being read from the magnetic recording medium by an unauthorized reading device attached in front of the insertion slot. In the device
A magnetic body is provided for unevenly distributing the disturbing magnetic field generated from the magnetic field generation unit so as not to reach the magnetic head,
The magnetic body is a ferrite core for noise shielding attached to a flat cable,
A magnetic recording medium reading device, wherein the magnetic body is disposed in at least one place on the upper side, side, front, and rear of the magnetic head. The magnetic recording medium reader according to claim 1, 2, or 8,
A magnetic recording medium reading device, wherein the magnetic body is arranged to be inclined with respect to the magnetic head so that a disturbing magnetic field generated from the magnetic field generation unit is unevenly distributed in a direction away from the magnetic head.

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