JPS6356625B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a magnetic card reader that is capable of reading magnetically recorded signals recorded on, for example, a magnetic card, and also capable of reading magnetically recorded signals recorded on a magnetic passbook. It is.

Conventionally, there has been a magnetic card reader as described above, but in this type of magnetic card reader, when a magnetic card or a magnetic passbook is run along the running path of the magnetic card reader, Since the position where the magnetic recording band passes is different between a magnetic card and a magnetic passbook, a magnetic head is provided for each position corresponding to the position where the magnetic recording band passes, and a magnetic recording signal read by the magnetic head is used. Separate demodulation circuits are installed to extract the data from the magnetic card and magnetic passbook.
There was a configuration in which separate demodulation circuits were used to extract data. This type of magnetic card reader has the drawback that it has a complicated circuit configuration and is difficult to miniaturize because it uses separate demodulation circuits to retrieve data.

There are also magnetic card readers with a single demodulation circuit, but in this type of magnetic card reader, the type of magnetic recording medium is set by operating the magnetic card reader from the outside, and the demodulation circuit Since it was configured to take out data, it had the disadvantage that if the type of magnetic recording medium was incorrectly set, data could not be taken out from the demodulation circuit.

The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to simplify the circuit configuration, and to automatically switch the connection state between the magnetic head and the demodulation circuit so that the demodulation circuit can be disconnected from the demodulation circuit. The object of the present invention is to provide a magnetic card reader that can reliably retrieve data.

The present invention is characterized by a magnetic head that is connected to the magnetic head that reads the magnetic recording strip in advance among the two magnetic heads, and that determines whether or not there is a reproduction output from the magnetic recording strip and outputs a determination signal. a recording signal discriminating means; a magnetic recording medium detecting means for outputting a detection signal that is a discrimination timing for the magnetic recording signal discriminating means when the leading edge of the magnetic recording medium is detected; the two magnetic heads; and the demodulating circuit. and switching means for switching the connection, and when the detection signal is output, the judgment result of the judgment means is that if there is an output, the magnetic recording band passes first, the magnetic head side, and if there is no output, the magnetic head side passes through first. The reason is that the connection of the demodulation circuit is switched to the side of the magnetic head through which the recording band passes later.

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

In FIG. 1, 1 is a magnetic card, and 1a is a magnetic recording band formed at a predetermined position on the magnetic card 1. In FIG. 2 is a magnetic passbook, and 2a is a magnetic recording band formed at a predetermined position of the magnetic passbook 2.
When the magnetic card 1 or the magnetic passbook 2 is run along the reference surface 3a of the magnetic card reader 3,
The magnetic recording band 1a and the magnetic recording band 2a pass through different positions on the travel path 3b. The magnetic card reader 3 has a magnetic head 4 for reading the magnetic recording signal recorded on the magnetic recording strip 1a and a magnetic recording signal recorded on the magnetic recording strip 2a at positions where the magnetic recording strips 1a and 2a pass. A magnetic head 5 for reading the information is provided respectively. 6 is a sensor for detecting a magnetic recording medium such as a magnetic card 1 or a magnetic passbook 2, which detects the leading edge of the magnetic recording medium and outputs a detection signal after the magnetic head 4 reads the magnetic recording signal. Therefore, it is disposed further back than the magnetic head 4 disposed on the side of the magnetic recording medium insertion opening 3c. The magnetic head 4 includes a switch means 7 consisting of a transistor or the like for switching connection states, and a demodulation circuit 10 for extracting the magnetic recording signals read by the magnetic heads 4 and 5 as data through amplifiers 8 and 9. and an analog counter 11 whose output potential becomes high level when a predetermined number of read pulses of the magnetic recording signal are input. On the other hand, the magnetic head 5 is connected to the demodulation circuit 10 via a switch means 7' and amplifiers 8' and 9'.
It is connected to. And analog counter 1
Reference numeral 1 functions as a magnetic recording signal discrimination means, that is, it has a function of discriminating the presence or absence of a magnetic recording signal and outputting a discrimination signal. This analog counter 11 is connected to the D terminal of a flip-flop 12. Further, the T terminal and Rs terminal of this flip-flop 12 are connected to the magnetic recording medium detecting means 6 via an amplifier 13, respectively. And this flip-flop 12 is
It is configured so that the potential of the Q output terminal becomes low level and the potential of the output terminal becomes high level only when the potential of the D input terminal is low level and the potential of the T input terminal is high level. On the other hand, when the relationship between the potentials of the T input terminal and the D input terminal is other than the above, the configuration is such that the potential of the Q output terminal is high level and the potential of the output terminal is low level. The Q output terminal is connected to switch means 7, while the output terminal is connected to switch means 7'. When the potential of the Q output terminal is at a high level, the magnetic head 4 and the demodulation circuit 10
When the magnetic head 5 and the demodulation circuit 10 are connected by the switch means 7, and the potential of one output terminal is at a high level, the magnetic head 5 and the demodulation circuit 10 are connected. That is, the switch means 7, 7' and the flip-flop 12 constitute a switching means for switching the demodulation circuit connected to one magnetic head 4 to the other magnetic head 5.

The operation of the embodiment according to the present invention will be explained below.

First, a case will be described in which the magnetic card 1 is run along the reference surface 3a. Before running the magnetic card 1, the flip-flop 12
The potential of the Q terminal of is at a high level due to the reset. Here, when the magnetic card 1 is run along the reference surface 3a, the magnetic recording signal recorded on the magnetic recording band 1a is read as shown in FIG. 3A.
The pulses of this magnetic recording signal are input to the analog counter 11, and after a predetermined number of pulses have been input, the potential of the analog counter 11 becomes high level as shown in FIG. 3B. Also,
After the analog counter 11 becomes high level, the leading edge of the magnetic card 1 is detected and the magnetic recording medium detecting means 6 becomes high level as shown in FIG. 3C. Therefore, the potential of the D terminal is high level,
In addition, since the potential at the T terminal becomes low level, the potential at the Q terminal remains at high level as shown in FIG. 3D. That is, the connection state between the magnetic head 4 and the demodulation circuit 10 is maintained, and the demodulation circuit 1
Data will be taken out from 0.

Next, a case will be described in which the magnetic passbook 2 is made to run along the reference surface 3a. Before the magnetic passbook 2 is run, the potential of the Q terminal is at a high level. Here, when the magnetic passbook 2 is run along the reference surface 3a, the magnetic recording signal recorded on the magnetic recording band 2a by the magnetic head 4 is not read as shown in E of FIG. No pulse is input to the analog counter 11, and the potential of the analog counter 11 remains at a low level as shown in FIG. Thereafter, the leading edge of the magnetic bankbook 2 is detected and the magnetic recording medium detecting means 6 becomes high level as shown in FIG. Therefore, the potential of the D terminal becomes a low level and the level of the T terminal becomes a high level, so the potential of the Q terminal becomes a low level,
The potential of the terminal becomes high level. Then, since the potential of the terminal becomes high level as shown in FIG.
The magnetic head 5 and the demodulation circuit 10 are brought into a connected state by the switch means 7'. Thereafter, the magnetic recording signal is read by the magnetic head 5 as shown in FIG. 4, and data is taken out from the demodulation circuit 10.

In the above embodiment, the magnetic recording signal discriminating means 11 is used for the magnetic card 1 (the side that reads it in advance).
However, instead of this, the determining means 11 can be replaced by the magnetic head 5 for the magnetic bankbook 2 (the side to be read later).
It can be provided as a device for determining the presence or absence of reproduction output. In this case, the detection means 6 may be arranged in such a positional relationship that the leading end of the magnetic recording medium is read by the magnetic head 5 when the leading end of the magnetic passbook 2 passes therethrough. As a result, when the magnetic recording medium detection means 6 is outputting a detection signal, if the magnetic recording signal determination means 11 determines that there is a reproduction output, the demodulation circuit 10 detects the magnetic head from the connection state with the magnetic head 4. The connection state is switched to 5.

In this embodiment, a magnetic card 1 and a magnetic passbook 2 are used.
Although the explanation has been given by taking as an example the magnetic recording signals recorded on the same magnetic card, it is clear from the above description that the magnetic card reader according to the present invention can read magnetic recording signals recorded on different positions on the same magnetic card. it is obvious.

Further, it is not necessary to provide the magnetic head 4 and the magnetic head 5 side by side as shown in FIG. Both magnetic heads 4 and 5 may be provided with their positions shifted in the running direction.

Note that a few millimeters at the end of the magnetic passbook 2 is actually a no-signal zone, so the magnetic head 4 is closed during this period.
Switching from the magnetic head to the magnetic head 5 is advantageous in terms of noise countermeasures.

In addition, when the magnetic passbook 2 is run along the magnetic card running path, if the detection signal is input to the analog counter and the analog counter is maintained at a low level, the amplifier can also be configured in one system. can.

In the present invention, the magnetic recording signal discriminating means is connected to the magnetic head of the two magnetic heads that reads the magnetic recording strip in advance, and when the magnetic recording medium detecting means detects the leading edge of the magnetic recording medium, The determination means determines whether or not there is a reproduction output, and if the determination result of the determination means when the detection signal is output is that there is an output, the magnetic head side through which the magnetic recording band passes first is sent to the magnetic head side where the magnetic recording band passes first. If so, the above demodulation circuit is connected to the magnetic head side through which the magnetic recording band passes later, so not only can the demodulation circuit be made into a single one, but also the complicated circuit for determining the magnetic recording medium can be omitted and the circuit configuration can be improved. This has the effect of simplifying the process and automatically setting the reading of the magnetic recording signal.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram for explaining the positional relationship of magnetic recording bands, Fig. 2 is a circuit block diagram of a magnetic card reader according to the present invention, and Fig. 3 A to D are magnetic recording signals recorded on a magnetic card. FIGS. 4(e) to 4(e) are timing charts for explaining reading of magnetic recording signals recorded on a magnetic passbook. 1... Magnetic card, 2... Magnetic passbook, 4, 5...
...Magnetic head, 6...Magnetic recording medium detection means,
7, 7'... switch means, 10... demodulation circuit,
11...Analog counter, 12...Flip-flop.

Claims (1)

[Claims] 1. Magnetic recording signals recorded on a magnetic recording medium having magnetic recording bands whose passing positions are different with respect to a running reference plane are recorded on a magnetic recording medium provided corresponding to the passing positions of the magnetic recording bands. In a magnetic card reader which reads data with a time difference between two magnetic heads, and demodulates the read magnetic recording signal by a demodulation circuit to extract data, a magnetic recording signal discriminating means connected to the magnetic head on the reading side and outputting a discriminating signal by discriminating the presence or absence of reproduction output from the magnetic recording band; and the magnetic recording signal discriminating means when the leading edge of the magnetic recording medium is detected. magnetic recording medium detection means for outputting a detection signal serving as a determination timing; and switching means for switching connection between the two magnetic heads and the demodulation circuit; If the determination result is that there is an output, the demodulation circuit is connected to the magnetic head side through which the magnetic recording band passes first, and if there is no output, the demodulation circuit is connected to the magnetic head side through which the magnetic recording band passes later. A magnetic card reader featuring: