JPS62203290A - Card identification device - Google Patents

Abstract

PURPOSE:To obtain a device with high illegal use effect by providing a magnetizing means for magnetizing a soft magnetic substance and providing a detection means for detecting the magnetizing state. CONSTITUTION:When it is supposed that a current of a degree magnetizing a magnetic layer 2 is fed to an exciting reproducing coil 4 by a constant current circuit 5 and a card 1 is carried in the direction of arrow, then magnetic flux is changed at a part where the magnetic layer 2 of the edge of the card 1 is discontinuous and the result is extracted as the output in the coil 4 and the result is obtained as a prescribed output by an amplifier circuit 6. Then at which position a punch hole exists is judged depending on the comparison with the position information for a motor clock signal or the like. In this state, even when a punch hole is choked by a tape, since he detection is made by magnetism, an output is extracted to a tape of a certain thickness. Thus, the illegal use preventing effect is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a card identification device for determining the authenticity of a card or the like.

[Conventional technology]

BACKGROUND ART Conventionally, a card is used as a coupon ticket, and for the convenience of the user, a hole is punched in the card each time the card is used or after a certain number of uses, so that the usage status can be visually checked. Furthermore, using the punch hole, the punch hole position on the card is detected by an optical sensor installed in the device, and the authenticity of the card is determined based on the position information and information recorded on the card, for example, by magnetic means. is being determined.

[Problem that the invention seeks to solve]

However, the value of this type of card is determined by the number of punch holes or the position of the punch holes, so if the punch hole is covered with tape, etc., the optical sensor will not be able to detect it, and the punch hole information will become undetectable. There were drawbacks such as the card being misread as a high-value card.

An object of the present invention is to provide a card identification device that can detect punch holes even if they are covered with tape or the like.

[Means for solving problems]

The card identification device according to the present invention uses a card coated with a soft magnetic material having almost no coercive force in the punched hole part, and includes a magnetizing means for magnetizing the soft magnetic material;
It is provided with a detection means for detecting the state of magnetization.

[Effect]

While the card is running, the magnetization means magnetizes the soft magnetic material provided in the punch hole part of the card, and when the magnetization state is detected, it is determined whether the soft magnetic material on the card is coated or not. At the boundary between the parts, a change in magnetic flux occurs due to the difference in magnetic permeability, which can be taken out as an output to the detection means. On the other hand, since the magnetic permeability does not change in a portion where there is no soft magnetic material or in a soft magnetic material portion, it does not appear as an output to the detection means. When a hole is punched in a soft magnetic material portion, a boundary exists because there is no magnetic material in the hole, and it can be taken out as an output to the detection means.

〔Example〕

FIG. 1 shows an embodiment of the present invention, where 1 is a card and 2 is a magnetic layer made of a soft magnetic material such as MnZn ferrite. It is provided. 3 is a magnetic head, and 4 is an excitation reproducing coil wound around the magnetic head 3. 5
is a constant current circuit, and 6 is an amplifier circuit. 7 is a punch hole punched at the position of the magnetic layer 2, and the punch hole 7 passes through the magnetic layer 2 and the card 1. 8 is a coupling capacitor.

Now, suppose that the card 1 is being conveyed in the direction of the arrow while the constant current circuit 5 is applying a current sufficient to magnetize the magnetic layer 2 to the excitation reproducing coil 4. The magnetic flux changes at the discontinuous portion, and can be taken out as an output to the excitation reproducing coil 4, and can be obtained as a predetermined output value by the amplifier circuit 6. Then, by comparing the position information with the motor clock signal, etc.,
It is possible to determine where the punch hole is placed.

To provide an identification device with an extremely high fraud prevention effect, since even if the punch hole is covered with tape in this state, the output can be taken out for tapes up to a certain thickness because the detection is based on magnetism. I can do it.

The above embodiment is based on the magnetic herad 3. The excitation reproducing coil 4 and the constant current circuit 5 constitute a magnetizing means, and the magnetic head 3. Excitation regeneration coil 4. In an example in which the detection means is configured by the amplifier circuit 6,
Magnetic head 3. Although the excitation reproducing coil 4 is provided in common to both means, the excitation reproducing coil 4 may be provided separately for excitation and regeneration.

FIG. 2 (Lt) shows the actual values measured in the above example, where the horizontal axis is the position of the card in the longitudinal direction, ■ is the edge of the card, and ■ is the position of the punched hole. The vertical axis is the output after amplification, which is shown as a relative value.

Figure 2(b) shows the measurement taken by placing a tape made of a non-magnetic material with a thickness of about 0.1 mm on the magnetic layer 2, and Figure 2(c) shows the measurement with a tape made of a non-magnetic material placed on the magnetic layer 2. The measurements were taken using a music tape consisting of: From this, it can be seen that although the detection output decreases somewhat when a non-magnetic material is applied, detection is possible as long as the thickness is around this level. It can also be seen that when a magnetic material is used, the same level of output as a normal case can be obtained.

Note that the thickness of the card can be regulated by the card insertion slot (not shown), and if the thickness is regulated so that cards with a thickness that cannot be detected by the detection method of this invention cannot be inserted, this problem will not occur. There isn't.

〔Effect of the invention〕

As explained above, the present invention is an identification device for a card coated with a soft magnetic material having almost no coercive force so as to include at least the punch hole portion, and the present invention includes a magnetizing means for magnetizing the soft magnetic material, and a magnetizing means for magnetizing the soft magnetic material. To provide a device that is extremely effective in preventing fraud, and is equipped with a detection means for detecting the state, so that it is possible to detect punch holes even if there is fraud such as applying tape when detecting punch holes. I can do it.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts and connections showing one embodiment of the present invention, and FIGS. 2(a) and (b). (C) is a diagram showing actual measured values of the identification means according to the present invention. In the figure, 1 is a card, 2 is a magnetic layer, 3 is a magnetic head, 4 is an excitation reproducing coil, 5 is a constant current circuit, 6 is an amplifier circuit, and 7 is a punch hole. □+1 □Old R♀
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Claims (1)

[Claims] An identification device for a card which is used like a coupon ticket and has an indication of the number of times of use etc. visually visible through a punched hole, and which is coated with a soft magnetic material having almost no coercive force so as to include at least the part where the punched hole is punched. A card identification device comprising: magnetization means for magnetizing the soft magnetic material; and detection means for detecting the state of magnetization.