JPH01185806A - Magnetic recording system and its magnetic head - Google Patents

Abstract

PURPOSE:To improve security against illegal use of a magnetic card by using a magnetic head having plural pieces of write/read gaps that are not parallel with each other and recording/reproducing information as moving a magnetic card sequentially in plural directions respectively perpendicular to the write/read gaps. CONSTITUTION:On the recording medium 21 of a magnetic card 2, data is recorded zigzag so that recording tracks come perpendicular to each other for magnetization patterns 22, 23, 24. A magnetic card reader/writer equipment is so constituted that the inserted magnetic card 2 is moved zigzag relatively with the magnetic head 1 as shown by the arrows A, B, C. Therefore, the magnetic head 1 relatively moves on the recording medium 21 sequentially as shown by the arrows A', B', C'. The magnetic pattern formed by recording on the zigzag recording tracks by means of the dedicated magnetic head having the read/write gaps corresponding to respective recording tracks, will not be read by an ordinary magnetic head having only one gap that scans only in one direction, hence the security can be improved.

Description

[Detailed Description of the Invention] [Summary] A magnetic recording method that has excellent security functions, especially against counterfeiting and misuse of magnetic cards, relating to a magnetic recording method for writing and reading data to and from a magnetic card and its magnetic head. The purpose of the present invention is to provide a magnetic recording system that is difficult to record and reproduce using the unidirectional scanning of a normal one-gap type magnetic head, and has multiple write/read gaps that are not parallel to each other. This configuration uses a magnetic head to sequentially move a magnetic card in a plurality of directions perpendicular to each write/read gap to write/reproduce information.

[Industrial application field]

The present invention relates to a magnetic recording method for writing and reading data to and from a magnetic card and its magnetic node.
In particular, the present invention relates to a magnetic recording system and its magnetic head that have excellent security functions against counterfeiting and misuse of magnetic cards.

Prepaid card systems using magnetic cards have become rapidly popular in recent years due to the convenience of being able to pay bills without having to carry cash. However, now that magnetic recording methods have become commonplace, it is relatively easy to read the recorded data on magnetic cards, and there is a risk that magnetic cards may be counterfeited and used fraudulently based on this data.

In order to prevent this, there is a strong demand for a magnetic recording system with excellent security functions, which is difficult to easily record/reproduce with a general magnetic head.

[Conventional technology]

FIG. 2 is a conceptual diagram showing a conventional magnetic card recording system.

Conventionally, recording and reproducing are performed by moving the magnetic card 2 in the direction of an arrow approximately perpendicular to the gap with respect to the magnetic head 3 having one write/read gear 31 for the lid, and forming a magnetic pattern 24 on the recording medium 21. Data was recorded only in one direction, and the data was read by moving in the same way.

Therefore, the recorded data is arranged in a straight line.

[Problems to be Solved by the Invention] Data recorded using the conventional magnetic recording method described above is obtained by: - A magnetic card is moved linearly in one direction under a magnetic head for a tape recorder, which is commonly used for boat fishing. By this,
It is relatively easy to read data such as ID codes and balances of value as cash vouchers, and based on this data, unrecorded magnetic cards can be counterfeited, or money data can be rerecorded on used magnetic cards for fraudulent use. There is a risk of being

The present invention was created in view of the above-mentioned problems.
The object of the present invention is to provide a magnetic recording system that is difficult to record and reproduce by scanning in one direction with a gap-type magnetic head, and has an excellent security function against misuse.

[Means for solving problems]

The above problem can be solved by using a magnetic head having a plurality of write/read gaps that are not parallel to each other and sequentially moving a magnetic card in a plurality of directions perpendicular to each write/read gap to write information. ! / A recording method for a magnetic card characterized by performing reproduction, and further a magnetic head for recording/reproducing digital data on a magnetic card, characterized by providing a plurality of write/read gaps that are not parallel to each other. This problem is solved by a magnetic head that

[For production]

The direction of movement of the magnetic card is not unidirectional, but the direction of movement is changed sequentially according to a predetermined sequence, and recording/reproduction is performed with write/read gaps corresponding to each direction of movement, so magnetically recorded data is recorded in one piece. Since it is not disposed on a straight trunk, it becomes difficult for a general magnetic head with an l gap to read recorded data by scanning in only one direction, and the security function is improved.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a conceptual diagram showing a magnetic recording system according to the present invention.

In the figure, 1 is a magnetic head, and 2 is a magnetic card having a recording medium 21.

The magnetic hand 1 consists of three substantially U-shaped core halves 13, 14, 15 made of magnetic material and two coils 16, 17. A pair of core halves 13 and 14 are joined with their end faces facing each other to form a magnetic circuit, and a first write/read gear 11 is formed on the lower magnetic card facing surface.
A first coil 16 for supplying recording magnetic flux to the second gear or detecting reading magnetic flux is wound thereon. A core half 15 is joined to the side surface of the first magnetic circuit, forming a second magnetic circuit having a second write/read gap 12 that is perpendicular to the first write/read gap, and The second write/read gap 12
A second coil 17 for recording and reading is wound thereon.

The magnetic recording method of the present invention using the above magnetic head is performed as follows.

On the recording medium 2I of the magnetic card 2, required data is recorded in a zigzag pattern as magnetization patterns 22, 23, and 24, each having a predetermined number of bits, by a method described later, such that the directions of the recording tracks are orthogonal to each other. shall be taken as a thing.

A magnetic card reader/writer device into which a magnetic card 2 having such recorded data is inserted moves the inserted magnetic card 2 through a magnetic head l in a zigzag manner as shown by arrows A, B, and C.
It is configured to move relative to. Therefore, the magnetic head l moves relative to the recording medium 21 in the order of arrows A', B', and C'. Then, the read circuit of the magnetic card reader/writer first operates through a second read lead gap 12 which is orthogonal to the movement direction when moving in the direction of arrow A'.
The magnetization pattern 22 is read by the first write/read gap 11 which is perpendicular to the second read gap 12 when the magnetization pattern 22 is read by the first write/read gap 11 which is perpendicular to the second read gap 12. During the movement, control B is performed so that the magnetization pattern 24 is read again in the second write/read gap 12.

When recording data, the recording medium 2 is moved relative to the magnetic head 1 in the same way as described above, and predetermined data is recorded on the zigzag recording track by the write/read gap corresponding to each movement. A magnetization pattern like this can be obtained.

In this way, the magnetization pattern recorded on a zigzag recording track with a dedicated magnetic head having a read/write gap corresponding to each recording track is similar to that of a general one.
Scanning the magnetic head of the gap in one direction prevents it from being easily read (improves security against counterfeiting and intentional counterfeiting of magnetic cards, etc.).

〔Effect of the invention〕

According to the present invention, it is possible to provide a magnetic recording method and its magnetic head that make it difficult to easily read data on a magnetic card, and it is possible to prevent misuse when using a magnetic card for a prepaid card, etc., and to put it into practical use. The effect is significant.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the magnetic recording system according to the present invention, and FIG. 2 is a schematic diagram of the magnetic recording system of a conventional magnetic card. In the figure, 1.3-・Magnetism・Nod, 11, 12.3
1- Read/Write gap, 13.
14.15- Core Raw Naka 16.17- Coil,
2--Magnetic card, 21--Recording medium,
22, 23, 24. 25--magnetic pattern.

Claims (2)

[Claims] (1) Using a magnetic head (1) having a plurality of write/read gaps (11, 12) that are not parallel to each other, magnetic A magnetic recording method characterized by recording/reproducing information by sequentially moving a card (2). (2) A magnetic head (1) for recording/reproducing digital data on/from a magnetic card (2), characterized in that a plurality of write/read gaps (11, 12) which are not parallel to each other are provided.