JPH0652008U - Magnetic head holding structure in card reader - Google Patents

Abstract

(57) [Summary] [Purpose] Stabilize writing and erasing with the magnetic head for pseudo data, and prevent unauthorized card processing of legitimate cards. [Structure] The magnetic head 9 and the touch roller 30 are in contact with each other with the card transport path 4 interposed therebetween. An AC head 16 as a pseudo data head is housed in a head holder 12 formed integrally with the upper housing 2 along the card transport path 4. And the bottom part 13 of the head holder 12
Is set to a distance at which the AC head 16 writes / erases the pseudo data on the magnetic card. The distance between the bottom surface portion 13 and the bulging portion 34 of the lower housing 3 facing the bottom surface portion 13 is formed to be the same as the thickness of the magnetic card.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic head holding structure for a card reader including a read / write magnetic head for reading / writing magnetic data of a card and a pseudo data magnetic head for writing / erasing pseudo data in the card.

[0002]

[Prior art]

 Conventionally, in order to prevent forgery and unauthorized use of a magnetic card, another magnetic recording layer for recording pseudo data is provided on the magnetic card in addition to the magnetic recording layer for recording normal magnetic data. Pseudo data is written and erased by a pseudo data magnetic head, which is different from the read / write magnetic head for reading and writing magnetic data on the magnetic recording layer.

FIG. 4 is a main part front view and a main part side view showing the structure of a conventional magnetic head touch roller of this type. In the figure, reference numeral 9 is a read / write magnetic head, and a touch roller 27 rotatably supported by a shaft 28 is disposed on the surface of the magnetic head 9 so as to be in close contact with it by a biasing means (not shown). . Reference numeral 16 is a magnetic head for pseudo data for applying an AC (alternating current) bias to the magnetic card 6, 37 is a side guide plate of the card conveying path, and 38 is an upper guide plate arranged above the magnetic head 16.

By the way, since reading and writing of magnetic data in the read / write magnetic head 9 requires extremely strict accuracy, a card is brought into close contact with the read / write magnetic head 9, and therefore the magnetic head 9 is greatly worn. There is a drawback. On the other hand, the accuracy of writing and erasing the suspicious data is not as severe as the card 6 is closely attached like the read / write magnetic head, and is to reduce the wear of the surface of the pseudo data magnetic head 16. In addition, a gap t of 0.4 mm is generally provided between the surface of the head 16 and the card 6.

[0005]

[Problems to be solved by the device]

 However, since a relatively hard polyacetal resin (POM) is used as the material of the above-mentioned conventional touch roller, abrasion due to contact between the touch roller and the magnetic head that occurs after passing the card causes the touch roller to move as shown in FIG. As shown in b), a substantially V-shaped depression 9a is formed at the center of the surface of the magnetic head 9. The card 6 sandwiched between the touch roller 27 and the read / write magnetic head 9 by the recess 9a is curved as shown by the chain double-dashed line, and the gap between the pseudo data magnetic head 16 and the card 6 is 0.4 mm. In some cases, the allowable accuracy range of writing / erasing by the pseudo data magnetic head 16 may be exceeded. For this reason, the pseudo data could not be written / erased normally, resulting in an update error, and even a legitimate card was judged to be a fraudulent card and processed as a fraudulent card, which made the card unusable.

Therefore, the present invention has been made in view of the above-mentioned conventional drawbacks, and an object of the present invention is to stabilize writing / erasing with a magnetic head for pseudo data and to prevent unauthorized use of a legitimate card. It is to provide a holding structure for a magnetic head in a card reader that prevents card processing.

[0007]

[Means for Solving the Problems]

 In order to achieve this object, the present invention provides a read / write magnetic head for reading / writing card magnetic data along a card transport path, and a pseudo data magnetic head for writing / erasing pseudo data on the card. And a touch roller that is pressed against the read / write magnetic head with the card transport path sandwiched between the read and write magnetic heads, and has a space wall between the read / write magnetic head and the card transport path. A holder for accommodating the magnetic head for data is provided, and the distance between the partition wall of the holder and the opposing card transport surface is made approximately the same as the thickness of the card.

[0008]

[Action]

 According to the present invention, the distance between the surface of the magnetic head for pseudo data and the magnetic card is always kept constant regardless of the state of the surface of the read / write magnetic head.

[0009]

【Example】

 FIG. 1 is a plan view of a card reader according to the present invention, FIG. 2 is a plan view of an essential part of the same, and FIG. 3 is a sectional view taken along line III-III of FIG. In these figures, 1 is a card reader, which is composed of an upper housing 2 and a lower housing 3 which form a card transport path 4 and which are made of synthetic resin. Reference numeral 5 is a card insertion slot for inserting the card 6, 7 is a punch unit, 8 is a window for a head formed in the upper housing 2, 9 is a read / write magnetic head, which is erected on the upper housing 2 via a bracket 10. It is attached to the rib 11 and protrudes from the head window 8 into the card transport path 4 and contacts the touch roller 30 described later.

Reference numeral 12 denotes a box-shaped head holder, which is integrally formed with the upper housing 2 and has a bottom surface portion 13 facing the card transport path 4 that is curved and protrudes toward the card transport path 4 side. A hole 14 is provided, and a pair of engaging projections 15 are formed on the upper end portion so as to face each other. An AC head 16 which is a magnetic head for pseudo data is fitted and fixed in the head holder 12 and is prevented from coming off by an engaging projection 15. The bottom surface portion 13 functions as a spacing wall that maintains the spacing between the AC head 16 that is fitted and fixed and the card transport path 4.

The wall thickness of the bottom surface portion 13 is formed at t (0.4 mm), which is a distance suitable for the AC head 16 to accurately write and erase pseudo data on the magnetic card 6. Reference numeral 18 is a gear of the motor 17 (not shown), and 19 is a connecting belt wound around the gear 18 and the gear 20. Reference numeral 22 is a drive roller axially attached to the rotary shaft 21 of the gear 20, 23 is a driven roller, 24 is an endless belt stretched between the drive roller 22 and the driven roller 23, and 25 is tension applied to the endless belt 24. The tension roller 26 is a conveying roller that holds the lower endless belt (not shown) stretched on the side of the lower housing 3 and the upper endless belt 24 in an intermediate portion under pressure contact.

A rectangular window 31 is formed in the lower housing 3 so as to correspond to the magnetic head 9, and bearing portions 29 having U-shaped grooves 30 are oppositely provided at both ends of the window 31. The shaft 28 is loosely fitted in the U-shaped groove 30 so that the touch roller 27 projects from the window 31 to the card transport path 4. A leaf spring 32 is screwed to a boss 33 formed to project from the lower housing 3, abuts against the shaft 28, and presses the touch roller 27 against the surface of the magnetic head 9. A bulging portion 38 having an arcuate side view is formed at a position of the lower housing 3 corresponding to the bottom surface portion 13 of the holder 12. The distance between the front end of the bulging portion 38 and the front end of the bottom surface 13 is formed to be substantially the same as the thickness of the magnetic card 6.

Next, the operation of the card reader having the above configuration will be described. When the card 6 is inserted into the card transport path 4 through the card insertion slot 5, a motor (not shown) rotates, and this rotation is transmitted to the drive roller 22 and the upper endless belt 24 moves. The lower endless belt pressed against the upper endless belt 24 also moves, and the card 6 is conveyed by being sandwiched by both belts and taken into the card conveying path 4. In the magnetic card 6, first, the pseudo data written in the card 6 by the AC head 16 is erased, then the read / write head 9 performs reading / writing, and then the pseudo data is written by the AC head 16 again. Will be returned from the card insertion slot 5.

Here, the magnetic card 6 conveyed to a position corresponding to the AC head 16 is sandwiched between the bottom surface portion 13 of the head holder 12 and the bulging portion 34, and comes into close contact with the bottom surface portion 13. Therefore, the distance between the surfaces of the magnetic card 6 and the AC head 16 that are in close contact with each other is always maintained at the thickness of the bottom surface portion 13, that is, an appropriate distance t between the surfaces of the magnetic card 6 and the AC head 16. , The pseudo data is accurately written and erased by the AC head 16, and thus it is possible to prevent the false data from being written and erased to the legitimate card and to be erroneously processed as an illegal card. Further, since the magnetic card 6 does not come into direct contact with the AC head 16 due to the bottom surface portion 13, the surface of the AC head 16 is not worn.

In this embodiment, the AC head 16 is used as the pseudo data head to apply the AC bias to the magnetic card 6. However, the present invention is not limited to this, and the DC bias is applied by the DC head. Of course, you can also call.

[0016]

[Effect of device]

 As described above, according to the present invention, the read / write magnetic head for reading / writing the magnetic data of the card along the card transport path and the pseudo data magnetic head for writing / erasing the pseudo data on the card are arranged in parallel. A holder is provided for accommodating the magnetic head for suspicious data, which has a space wall between it and the transport path.The space between the partition wall of the holder and the opposing card transport surface is approximately equal to the thickness of the card. Since the same distance is maintained, the surface distance between the magnetic card and the pseudo data magnetic head is kept constant regardless of the wear state of the read / write magnetic head surface. It is possible to prevent the false card from being mistakenly processed as a false card because the pseudo data cannot be written / erased on the regular card. In addition, since the magnetic card does not come into direct contact with the dummy data head due to this spacing wall, the surface of the dummy data head does not wear, and replacement due to wear is not necessary and the service life is extended. be able to.

[Brief description of drawings]

FIG. 1 is a plan view of a card reader according to the present invention.

FIG. 2 is a plan view of a main part of a magnetic head holding structure in the card reader according to the present invention.

3 is a sectional view taken along line III-III of FIG.

4A and 4B show a magnetic head holding structure in a conventional card reader, in which FIG. 4A is a front view and FIG. 4B is a side view.

[Explanation of symbols]

 1 Card Reader 2 Upper Housing 3 Lower Housing 4 Card Carrying Path 5 Card Insertion Port 6 Card 9 Read / Write Head 12 Head Holder 13 Bottom Part 16 AC Head 24 Endless Belt 30 Touch Roller 34 Swelling Part

Claims (1)

[Scope of utility model registration request] 1. A read / write magnetic head for reading / writing magnetic data of a card along with a card transport path and a pseudo data magnetic head for writing / erasing pseudo data on / from the card are arranged in parallel, and the read / write is performed. In a card reader in which a touch roller is provided in pressure contact with a magnetic head for a card while sandwiching the card transport path, a holder having a partition wall between the magnetic head and the card transport path for accommodating the pseudo data magnetic head is provided. A structure for holding a magnetic head in a card reader, characterized in that the distance between the partition wall of the holder and the opposing card transport surface is substantially the same as the thickness of the card.