JPH05197825A - Reading method for punch hole and magnetic bar code - Google Patents

Abstract

PURPOSE:To provide a magnetic card reproducing method which can detect a punch hole with a magnetic head and also can read the magnetic information. CONSTITUTION:A magnetic bar code is formed on a magnetic recording layer 5 of a magnetic card 1 with use of a soft magnetic material 6. Then the positions of the punch holes 2 are set on the layer 5 on the same track position as the magnetic bar code and at different positions of the bar code. The magnetic resistance of the track is detected by a magnetic head, and the area corresponding to the detection signal which is started with reduction of the detected magnetic resistance is detected as the information on the magnetic bar code. Meanwhile the area corresponding to the detection signal which is started with increase of the magnetic resistance is detected as a hole 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic card for recording various kinds of information, and to a method for reading a magnetic bar code and a punched hole when the punched hole is provided.

[0002]

2. Description of the Related Art In conventional magnetic cards used for finance, distribution, transportation, telephones, etc., punch holes and magnetic information may be provided in the magnetic cards. For example, as shown in the plan view of FIG. 3 (A) for indicating that the card has been used or for displaying the frequency, a punch hole 2 is punched in the magnetic card 1 or, apart from this, for example, An operator's code or the like is recorded on the magnetic recording layer 5 as magnetic information.

The punch hole is detected by detecting the presence of the punch hole 2 when the magnetic card 1 is inserted into the reading / writing device, as shown in the sectional view of FIG. 3 (B). The punch hole 2 is checked by arranging 4a and the light-receiving element 4b above and below the passage point of the card 1.

[0004]

However, according to the above-mentioned prior art, in addition to the magnetic head for reading the magnetic information on the magnetic recording layer 5, the optical element 4a for detecting the punch hole 2,
It was necessary to equip 4b, and there was a problem that the number of parts increased.

In view of the above problems, it is an object of the present invention to provide a method capable of detecting punched holes as well as reading magnetic information by a magnetic head.

[0006]

In order to achieve the above object, the present invention forms a magnetic bar code made of a soft magnetic material on a magnetic recording layer of a magnetic card, and at the same track position as the magnetic bar code. A portion corresponding to a detection signal starting from a decrease in the magnetic resistance detected by the magnetic head is set by setting a portion where a punch hole is provided at a position different from the magnetic bar code, detecting the magnetic resistance of the track by the magnetic head. Is detected as magnetic bar code information, and a portion corresponding to a detection signal started from an increase in magnetic resistance is detected as punch hole information.

[0007]

According to the present invention, as described above, the magnetic bar code made of the soft magnetic material is formed on the magnetic recording layer of the card, and different positions of the same track are set as punching positions of the magnetic head. When the magnetic resistance is detected by the method, the magnetic resistance decreases at the magnetic bar code portion, and the decrease in the magnetic resistance can be detected as magnetic bar code information. On the contrary, in the case of a punch hole, the magnetic resistance increases, so that it can be grasped as punch hole information.

[0008]

1A is a plan view showing an example of a magnetic card embodying the present invention, FIG. 1B is a partially enlarged view thereof, and FIG.
FIG. 1A is an enlarged sectional view of FIG. In these figures, 5 is a magnetic recording layer formed on the magnetic card 1, and 6 is a magnetic recording layer.
Is a magnetic material formed on the magnetic recording layer 5 to form a magnetic bar code, which is formed with different widths or intervals to provide position information. Reference numeral 7 denotes a magnetic head, which has an input winding 8 for passing a direct current and an output winding 9 for detecting a magnetic resistance. A protective layer 10 covers the magnetic bar code 6 and the magnetic recording layer 5.

FIG. 1C is a circuit for performing the signal processing of this embodiment, and FIG. 2B is a waveform diagram showing its operation.
In the circuit diagram of FIG. 1C, 11 is an amplifier circuit which obtains the output signal of the output winding 9 of the magnetic head 7 having the waveform shown in a of FIG. 2B, and 12 is the signal a from 1 A bistable multivibrator circuit that changes the output level for each pulse, 13 is a circuit that determines the polarity of the signal a, 1
Reference numeral 4 is a logic circuit that takes the logical product of the positive display signal c and the output signal b of the bistable multivibrator circuit, and 15 is the logical product of the negative display signal d and the output signal b of the bistable multivibrator circuit. It is a logic circuit.

With this structure, the magnetic card 1 is moved as shown by the arrow X in FIG. 2A, a DC current is passed through the input winding 8 of the magnetic head 7, and the output signal of the output winding 9 is output. When added to the amplifier circuit 11, when the gap of the magnetic head 7 moves from the magnetic recording layer 5 to a position facing the edge of the soft magnetic material 6 and the magnetic resistance decreases, the action of the circuits 11 to 15 causes the magnetic bar to move. When the code display signal e is turned on, the circuit (not shown) processes it as magnetic bar code information, and when the punch hole 2 reaches the position facing the magnetic head 7 and the magnetic resistance becomes large, the punch hole display signal f is changed. When it is turned on, it is determined as a punch hole, and a circuit (not shown) performs processing as punch hole information. A microcomputer may be used instead of the circuits 12 to 15.

[0011]

According to the present invention, a magnetic bar code made of a soft magnetic material is formed on a magnetic recording layer, and punch holes are provided at the same track position as the magnetic bar code and at a position different from the magnetic bar code. The change in magnetic resistance between the soft magnetic material and the punch hole caused by the relative movement of the card and the magnetic head is used to determine whether it is a magnetic bar code or a punch hole. The code reading head also serves as punch hole detection, which contributes to a reduction in the number of parts.

[Brief description of drawings]

FIG. 1A is a plan view showing an example of a magnetic card 1 embodying the present invention, FIG. 1B is a partially enlarged view of FIG. 1A, and FIG. 1C is an example of a signal processing circuit of this embodiment. is there.

FIG. 2A is a side sectional view of a magnetic card of this embodiment,
(B) is a signal processing waveform diagram drawn in relation to (A).

FIG. 3A is a plan view illustrating a punch hole in a conventional magnetic card, and FIG. 3B is a side view of a magnetic card device illustrating a conventional punch hole reading method.

[Explanation of symbols]

 1 magnetic card 2 punch hole 5 magnetic recording layer 6 soft magnetic material 7 magnetic head 8 input winding 9 output winding 10 protective layer 11 amplification circuit 12 bistable multivibrator 13 polarity determination circuit 14, 15 logic circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroya Kitagawa 13-1 Nihonbashi, Chuo-ku, Tokyo T-DK Corporation

Claims (1)

[Claims] 1. A magnetic bar code made of a soft magnetic material is formed on a magnetic recording layer of a magnetic card, and a punch hole is provided at the same track position as the magnetic bar code and at a position different from the magnetic bar code. The magnetic resistance of the track is detected by the magnetic head, and the portion corresponding to the detection signal started from the decrease of the magnetic resistance detected by the magnetic head is detected as the magnetic barcode information, and the increase of the magnetic resistance is started. A method of reading a punched hole and a magnetic bar code, characterized in that a portion corresponding to the detected signal is detected as punched hole information.