JPS5928550Y2 - card reader - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a card reader installed in a cooking appliance such as a microwave oven, which allows cooking information to be set using a magnetic card, for example.

In recent years, many control devices using magnetic cards have come into use.

Their format varies depending on the application, but for example, magnetic cards are also used in cooking devices such as microwave ovens used at home to control the operation of the cooking device, that is, cooking information (cooking time, cooking temperature, etc.).
There is a tendency to simplify input operations for data such as high heat, low heat, etc.

In this case, the most suitable card reader would be one in which the magnetic card is manually inserted into a predetermined position and then the magnetic card is pulled out.

A magnetic card is basically the same as a tape recorder,
Magnetic recording is performed in the running direction using a digital recording method.

Further, data recorded on a magnetic card is read or written when the magnetic head is in close contact with the magnetic stripe when the card is running.

Therefore, it is desirable that the card travel be as constant and smooth as possible.

Therefore, in manually inserted magnetic card readers, reading or writing is normally performed when the card is removed.

According to this manual insertion type magnetic card reader, there are four directions for inserting a magnetic card into the reader's insertion slot: the front, back, front, and back of the card, but only one direction allows data to be read or written properly. There is only one direction in which the magnetic stripe surface on the card and the magnetic head of the reader can make contact.

Therefore, it would be very convenient if the reader were provided with a notification function that would notify the user whether or not the insertion direction is correct when the card is completely inserted into the insertion slot of the reader.

Therefore, a method of making the shape of the card asymmetric and mechanically or optically detecting whether the insertion direction is correct may be considered.

The present invention is completely different from that method, and is devised to detect the proper position regardless of the shape of the Ricardo, and will be explained below with reference to the drawings.

Figure 1 shows a typical block diagram of a manually inserted magnetic card reader. According to this, the magnetic head 1 is used for reading and writing data, and the magnetic head 2 is used for writing, which is a timing signal at the time of writing. Used for reading clock pulses.

These magnetic heads 1 and 2 are connected to a magnetic card reader 3 in FIG.
As shown in the schematic structure, the magnetic card 4 is disposed with its head surface facing the card running path 5, and comes into contact with the magnetic stripe 4' of the magnetic card 4 that is slidable on the roller 6.

1 and 4, a normally closed card switch 7 is disposed at the innermost part of the card running path 5 of the magnetic card reader 3, and when the magnetic card 4 is inserted all the way, the magnetic card 4 The end of the movable element 8 is pushed and opened.

9 is "0" detected by the magnetic head 1;

This is a read amplifier that amplifies serial data consisting of a "1" signal, and its output is input to a level detection circuit 10 and a decoder circuit 11.

This level detection circuit 10 outputs "111" when there is a signal, and outputs "0pa" when there is no signal.

The decoder circuit 11 converts the read serial data into 5-bit parallel data including parity pits, and outputs read data RDD together with a read clock RCP.

12 is a write amplifier, which converts the 5-bit parallel data input DIN into serial data using the encoder circuit 13, amplifies the serial data, and writes the data into the data track on the magnetic stripe 4' of the magnetic card 4 using the magnetic head 1. This is an amplifier for

In this writing, a timing signal recorded in advance on the magnetic stripe l of the magnetic card 4 is read out by the magnetic head 2 and output as a write clock pulse WCP via the clock amplifier 14.

On the other hand, this write clock pulse UCP reaches the level detection circuit 15, and the presence or absence of the signal is detected.

Next, the card misset detection circuit, which is the essential part of the present invention, will be explained with reference to FIG.

In this circuit, a start signal STR and a card running signal BU are input to each of the anime games 1-16 and 17.
SY is in series with the card switch 7 which is connected to ground as shown in FIG.

The connection point with the resistor 18 connected to the level detection circuit 10
．． These are signals output from each output terminal of the OR circuit 19 which inputs the outputs of the circuits 15 and 15.

As shown in the time chart of FIG. 3, this start signal STR becomes "1" when the card 4 is inserted to the deepest part of the card running path 5 and the card switch 7 is in the open state.
Take the level of.

Further, the card running signal BUSY detects the "1" level only when the magnetic card 4 is inserted into the card reader 3 in the proper direction as shown in FIG. Le.

Assume now that the magnetic card 4 is inserted into the card reader 3 in the proper direction as shown in FIG.

In this case, the set terminal S1 and reset terminal R of the R8 type flip-flop 21 are connected to the card's The set signal Se shown in FIG. 3 is generated at the time of insertion and withdrawal, respectively.
t, the reset signal Re5et is input.

That is, since the set signal Set is generated when the card is inserted into the innermost part and when the card is pulled out, there is a set output from the output terminal Q of the R8 type flip-flop 21 while the card is inserted into the innermost part. .

Therefore, when the collector emitter is connected in series with the light emitting diode 22, the switching transistor 23 becomes conductive during that time, lights up the light emitting diode 22, and reports that the correct setting has been made.

If the card 4 is not inserted in the correct direction, the magnetic heads 1 and 2 will not come into contact with the magnetic stripe 4', so the card running signal BUSY will not be output at all during either reading or writing. , no set output is generated from the R8 type flip-flop 21.

Therefore, since the light emitting diode 22 does not light up, it is known that the setting is incorrect.

As explained above, the present invention provides a means for detecting that the card has been inserted to the deepest part of the travel path, a means for reading information recorded on the card, and a signal from the detecting means and a signal from the reading means. In combination, the card is equipped with a card mis-setting detection means consisting of a means for obtaining a set signal and a reset signal of the R8 type flip-flop, and a display means connected to the output terminal of the above-mentioned flip-flop. Since the display means can be operated while the card is inserted normally, the user can immediately know that the card has been inserted correctly, which is extremely convenient, and also makes it easier to check for malfunctions in terms of service. The location becomes clear and can be of high practical value.

[Brief explanation of drawings]

Fig. 1 is an electrical circuit diagram of a magnetic card reader (assembled therein) which is an embodiment of the present invention. Fig. 2 is a card misset detection circuit diagram assembled in the magnetic card reader. A time chart of signals generated in each part of the circuit. Fig. 4 is a schematic configuration diagram of the magnetic card reader, and a
The figure is a side view, and figure b is a plan view. 1.2...magnetic head, 3...magnetic card reader, 4...magnetic card, 4'...magnetic stripe, 5...card running Road, 7...
...Card switch, 9...Lead amplifier,
10... Level detection circuit, 14... Clock amplifier, 15... Level detection circuit, 19
...OR circuit, 16,17...AND gate, 20...Inverter, 21...
・R8 type flip-flop, 22... Light emitting diode, 23... Transistor, RDD...
...Read data, BUSY...Card running signal, WCP/song/write clock pulse, STR...
...Start signal.

Claims (1)

[Scope of utility model registration request] A means for detecting that the card has been inserted to the deepest part of the travel path, a means for reading out information recorded on the card, and a set signal for the R8 type flip-flop by combining the signal of the detection means and the signal of the reading means. What is claimed is: 1. A card reader comprising: means for detecting incorrect card setting; and means for obtaining a reset signal; and display means connected to an output terminal of the flip-flop.