JPS63157293A - Card detection system - Google Patents

Abstract

PURPOSE:To discriminate the front surface from the rear surface of a card inserted in the inlet of a card reader or card reader/writer by detecting the protrusion and recession of the emboss part provided in the card. CONSTITUTION:If a card is inserted in a card inlet, a card sensor 1 transmits not only a signal representing the insertion of the card but a detection signal about the card emboss provided in the card. A card setting detection circuit 2 detects whether the card is inserted with its front surface or rear surface up by using said detection signal from the card sensor 1, discriminates whether the setting is normal or not, and submits a discrimination result to an information control circuit 3. The circuit 3, when the discrimination result from the circuit 2 shows an abnormal setting, reports it to the host device, prohibits accessing to a card interface control circuit 4, but in case of a normal setting, follows an instruction from the host device and accesses the circuit 4.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a card detection method in a card reading or reading/writing device, and in particular, a card detection method suitable for detecting the setting state of the front and back of a card. Regarding the method.

[Conventional technology]

2. Description of the Related Art As a conventional technique related to card reading or handling of cards in a reading and shaving device, for example, a technique described in Japanese Patent Application Laid-Open No. 121474/1984 is known. This conventional technology has two magnetic heads installed near the card insertion slot, and after detecting the characteristics of the card, immediately drives a shutter opening/closing mechanism installed in the card insertion slot, thereby quickly inserting the card into the device. It is designed so that it can enter inside.

[Problem that the invention seeks to solve]

In the prior art, since the percentage of the card is detected by a magnetic head, when the card is inserted into the handle with the face reversed,
! There is a problem in that it is not possible to automatically determine whether there is a poor connection at the contact part at the interface with the cm side, whether the card is inserted upside down, or whether information is destroyed inside the card. Also, when using an IC card as a card, depending on the card,
Contact terminals are provided on both the front and back sides, and even if the card is inserted upside down, there is a possibility that the contact terminals will be in the same position as when inserted normally. There is a problem in that information is read or written.

The purpose of the present invention is to prevent the card from being inserted into the insertion slot of a card reading or reading/soaking device upside down.
It is an object of the present invention to provide a card detection method that can automatically detect reverse insertion and solve the problems of the prior art.

[Means for solving problems]

According to the present invention, the above purpose is to read, read, and write the front and back of the card inserted into the insertion slot of the VCfit by detecting the uneven sensor on the embossed part provided on the card. This is achieved by making a distinction.

[For production]

The unevenness of the embossed portion provided on the card is located at a predetermined position defined by the JI8 standard, and is detected by a sensor at that position. By doing this, it is possible to determine that the side to be inserted with unevenness is the front, and the side without unevenness is the back.If the reverse side is set when the front side is expected, it will automatically determine whether the card is inserted in the opposite direction. be able to.

〔Example〕

Hereinafter, one embodiment of the card detection method according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a card reading or reading/writing device to which the card detection method according to the present invention is applied, and FIG. 2 is a block diagram of an embodiment of the present invention for detecting the card layer table. 3 is a block diagram of a circuit for extracting a sensor signal, and FIG. 4 is a diagram showing a senna signal waveform. 1, 2, and 3, 1 is a card sensor, 2 is a card setting configuration circuit, 3 is an information control circuit, and 4 is a card sensor.
2 is a card interface control path, 20 is a card reading/writing section, 21 is a card, 22 is a card emboss, 23 is a census inch, 24 is a gate, and 25 is a flip-flop.

reading a card with a card detection method according to the invention;
Alternatively, as shown in FIG. 1, the reading and discarding device includes a card sensor 1 provided in the card insertion slot and a card setting detection circuit that detects the insertion status of the card based on the detection signal detected by the card sensor 1. 2, a card interface control circuit 4 that controls reading of information in the card or writing of information in the card, and an information control circuit that communicates with a host device (not shown) and controls the aforementioned functional circuits. 3.

Now, in order to carry out some kind of transaction, the cardholder
When a card (not shown) is inserted into the card slot of the device shown in Figure 1, the card sensor 1 detects the card emboss on the inserted card at the same time as the card is inserted. Send to detection circuit 2. The card setting detection circuit 2 detects in which direction the card is inserted into the production table based on the detection signal from the card sensor 1, determines whether the setting is normal or not, and sends the determination result to the information control circuit 3. hand over. If the determination result from the card setting cutting circuit 2 is abnormally revised, the information control circuit 3 controls the upper level RK.
A report to that effect is made and access to the card interface control circuit 4 is prohibited, and if the setting is normal, the card interface control circuit 4 is accessed according to instructions from the host device.

The card sensor 1 is placed in the card insertion slot of the card reading/writing section 20, as shown in FIG. It is composed of a sensor switch 23 having a fixed movable contact a1, and a gate 24 and a flip-flop 25 connected to the movable contact a as shown in FIG. Also,
The card 21 is provided with a card embossment 22 formed by unevenness fVc at a predetermined position on the card 21.

When this card 21 is in a normal state, as shown in the figure, when it is inserted into the card insertion slot with the card embossing 22 facing upward, the sensor switch 23 will cause the kb contact a to contact the fixed contact at the protrusion of the card embossing 22. The recess makes contact with the fixed contact and moves it away from the fixed contact. Therefore, when the card 21 is set normally, the output signal (a) from the flip-flop 25 in the circuit block diagram shown in Figure 3 will change as the normal waveform shown in Figure 4 as the card is inserted. It becomes a rectangular pulse shaped iki number.

On the other hand, when the card 21 is inserted into the card insertion slot in an abnormal state, that is, in the case shown, with the card embossing 22 facing downward, the movable contact a of the sensor switch 23 remains in contact with the fixed contact. It becomes the state of flip 70
The output signal (a) of the toggle 25 becomes a signal shown as an abnormal waveform in FIG. 4.

The card setting detection circuit 2 shown in FIG.
Upon receiving the output signal from the frog 25, the above-mentioned judgment is made, and the card interface control circuit 4 reads +' according to the instructions from the information control circuit 3 and reads the card through the card reading and shaving unit 20 shown in FIG. Controls reading and collection of information on the card.

In the embodiment of the present invention described above, in order to detect the card embossment 22 provided on the card 21, a sensor switch 23 was used which performs contact and non-contact operation depending on the unevenness of the card embossment. 230
Alternatively, 5iC may be used to detect the unevenness of the card embossing using an optical sensor or the like.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a card handling terminal device to which the card detection method according to the present invention is applied, and FIG. FIG. 3 is a block diagram of an embodiment of the present invention for detecting & tables, FIG. 3 is a block diagram of a circuit for extracting sensor signals, and FIG. 4 is a diagram showing sensor signal shaping. 1... Card sensor, 2... Card setting detection circuit, 3... Information control circuit, 4...
... Card interface control circuit, 20 ... Song card reading and writing section, 21 ... Song card, 22 - Concave card enhancer, 23 ... Census inch, 24
...Kate, 25...Flip Frog. ,' Agent: Patent attorney Katsuo Ogawa (1 person, Fig. 1, Fig. 2, Fig. 3, Fig. 4)

Claims (1)

[Claims] 1. A card reading/reading/writing device equipped with a card, which is equipped with a control circuit that reads information on the card, writes information on the card, and sends and receives information to and from a host device. A card detection method that detects normal insertion or abnormal insertion of a card by detecting unevenness of the emboss with a sensor.