JPH0476817A - Magnetic recording type ticket piece - Google Patents

Abstract

PURPOSE:To improve reliability by adopting various recording systems for making deciphering difficult as a system to read a recorded signal according to the difference of coersive force. CONSTITUTION:On one side of a card base body at least, more than three kinds of magnetic recording areas are formed with different coercive force. For a magnetic card A, three square-formed magnetic recording areas 2, 3 and 4 are respectively distributedly arranged, and the respectively different coercive force is set in each area on one side of an almost rectangular card base body. Therefore, as a reader, a specified device is used while arranging a coercive force measuring head and a magnetic signal reading head corresponding to an arranging pattern. Therefore, it is effective for preventing the deciphering of recorded information with ill will or the rivision of signals, and high security is realized.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a magnetic recording type ticket piece typified by a magnetic card used in a prepaid card or the like.

[Conventional technology]

Conventionally, a magnetic barcode type magnetic card is known as a typical ticket piece of this type.

This magnetic barcode divides the magnetic recording area composed of a magnetic coating film into small units, and differentiates each division unit by 1.0 depending on whether it has a magnetic signal or not. It was designed to record.

[Problem to be solved by the invention]

However, with the above-mentioned magnetic barcode method,
Since the entire magnetic recording area has a certain coercive force, the signal can be easily read with a simple magnetic measuring device such as a magnetic viewer, and confidential information can be deciphered if the card is stolen or lost. The disadvantage is that it is easy to be misused or maliciously tampered with the signal.

In view of the above-mentioned circumstances, this invention provides a highly reliable magnetic recording type ticket piece that can adopt various recording formats that make it difficult to read the recorded signal with a simple magnetic measuring instrument and that makes it difficult to decipher. It is intended to serve.

[Means to solve the problem]

As a result of intensive studies to achieve the above objective, the inventors discovered that if recorded signals are read based on differences in coercive force, rather than based on the presence or absence of magnetic signals as in the past, simple magnetic The inventors have discovered that it is possible to prevent signals from being read by a measuring tool, and to make it difficult to decipher information by setting various arrangement patterns of regions with different coercive forces, and have thus come up with this invention.

That is, the present invention relates to a magnetic recording type ticket piece in which magnetic recording areas having three or more different coercive forces are formed on at least one side of a card base.

[For production]

Since the ticket of the present invention has three or more magnetic recording areas having different coercive forces as described above, the difference in coercive force between these areas can be used as a signal for determining authenticity. For example, with a simple magnetic measuring device like Magnet Pure, even if it scans each of the above areas, it will only determine that there is a magnetic signal, but the difference in coercive force can be determined by the coercive force measuring device or each coercive force. It is unreadable unless you use a special device such as a devious Magnet Pure.

Therefore, this ticket piece is very effective in preventing malicious decoding of recorded information and signal tampering, and has high security.

To form magnetic recording areas with different coercive forces as described above, magnetic paints using magnetic powders with different coercive forces are applied to predetermined positions and areas on the card base, and dried to form a magnetic coating film. do it.

The above-mentioned magnetic powders have been widely used as magnetic recording elements of magnetic recording media such as magnetic tapes and magnetic disks, and powders having various coercive forces can be easily obtained at the current state of the art. However, since the selection of magnetic powder, preparation of magnetic paint, formation of magnetic coating film, etc. require highly specialized knowledge and equipment, it is generally not easy to reproduce the card base itself.

Although the magnetic recording ticket of the present invention has three or more types of magnetic recording areas having different coercive forces, it is not necessary that all the areas have different coercive forces. In other words, out of the n regions, (n>k≧3) regions have different coercive forces, and the remaining n− regions have the same coercive force as any of the former regions. It is also possible to have one. In addition, various information can be magnetically recorded in each magnetic recording area using conventional means, and the recorded information can be erased by degaussing.

The arrangement of the magnetic recording area on the card base as described above is as follows:
The plurality of regions may be arranged along the running direction of the ticket in the writing/reading device (reader/writer), or may be arranged in a direction perpendicular to the running direction. Also,
A dispersed non-array arrangement may also be used. In such an arrangement pattern or arrangement of regions having different coercive forces, the permutation pattern itself can be used as a signal.

In addition, as a way of using the ticket, one area (l<m) out of m areas is demagnetized in advance, and then it can be reused by demagnetizing all m areas after use or during use. can be set to be disabled. Further, a ticket piece in which regions having different coercive forces are arranged in a certain order, for example, coercive force A
, B, and C are arranged in the order of ABACBC, and the magnetic information read from the ticket is rearranged in a different order than the above arrangement, for example, in the order of AABBCC, so that it can be read as correct information, further increasing security. Is possible.

〔Example〕

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

FIG. 1 shows a magnetic card A of the first embodiment. This magnetic card A has three square magnetic recording areas 2.degree. 3.4 arranged in a dispersed manner on one side of a substantially rectangular card base 1. The coercivity of each region is 300 oersted in region 2, 650 oersted in region 3, 1 in region 4,
Each is set at 200 oersted.

In such a magnetic card A, the arrangement pattern of each area 2 to 4 on the card base 1 can also be used as a signal. Therefore, as a reading device, one in which a coercive force measuring head and a magnetic signal reading head are arranged in accordance with the above arrangement pattern is used.

FIG. 2 shows a magnetic card B according to a second embodiment. This magnetic card B has six square magnetic recording areas 5 to 10 arranged on one side of a card base 1 similar to the above, along the reading direction shown by the arrow. , and the entire card surface other than these areas also constitutes the magnetic recording area 11. The coercivity of each region is 300 Oersteds for regions 5 and 9, 650 Oersteds for region 7, 1,200 Oersteds for region yi6, and 170 Oersteds for regions 8 and 10.
They are set at 50 oersted and 11 areas and 2.750 oersted, respectively.

In this magnetic card B, the permutation of areas 5 to 10 can be used as a signal, and in order to improve security, the read signals can be rearranged in a different order from areas 5 to 0 so that the correct information can be decoded. It is also possible.

In addition, in the magnetic recording type ticket of the present invention, various design changes other than those shown in the example can be made with respect to the number, shape, size, arrangement pattern, set coercive force, shape of the card body, etc. of the magnetic recording areas.

〔Effect of the invention〕

According to this invention, it is equipped with three or more types of magnetic recording areas with different coercive forces, and the difference in coercive force between these areas can be used as a signal for determining authenticity, making it difficult to read the signals with a simple magnetic measuring instrument. Furthermore, the arrangement pattern of the magnetic recording areas itself can be used as a signal, making it possible to provide highly secure magnetic recording tickets such as magnetic cards.

[Brief explanation of drawings]

FIG. 1 is a plan view of a magnetic cart according to a first embodiment of this invention;
FIG. 2 is a plan view of a magnetic card according to a second embodiment of the invention. A, B...Magnetic card, 1...Card base, 2-1
1...Magnetic recording area patent applicant Representative of Hitachi Maxell Co., Ltd. Patent attorney Hajime Neyuki

Claims (1)

[Claims] (1) A magnetic recording type ticket piece in which magnetic recording areas having three or more different coercive forces are formed on at least one side of a card base.