KR100222747B1 - Ic card reader and writer - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide an IC card reading and writing apparatus for inspecting a contact state of an IC card with a contact.

The means of the present invention for achieving the above object is a voltage detecting means for detecting the voltage of the contact pins (15) (17) connected to the two terminals (40) (42) for supplying an operating voltage to the IC card ( 24) and the judging means 25 which compares this detected voltage with a predetermined reference value, and outputs a signal for stopping access to the IC card to the access control means 21 when it deviates from the reference value. And when an out-of-standard IC card is inserted or when contact is not made normally with the IC card, the access to the IC card is stopped because the voltage between the terminals 40 and 42 deviates from the reference value. It is configured to be.

Description

IC card reading and writing device

1 is a diagram showing an embodiment of an IC card reading and writing apparatus.

2 is a block diagram showing an embodiment of the present invention.

3 is a block diagram showing another embodiment of the present invention.

4 (a) and 4 (b) are partial sectional views and block diagrams each showing an example of an IC card.

* Explanation of symbols for main parts of the drawings

9: contact head 10-17: contact pin

23: contact inspection means 30: IC card

35 ~ 42: Contact

[Industrial use]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC card reading and writing device for reading data from or writing data to a card-type storage medium incorporating a semiconductor memory circuit.

[Prior art]

A card-type memory medium incorporating a semiconductor memory circuit, a so-called IC card 30, includes a semiconductor memory device 31 such as an EEPROM and an IC card reading and writing device as shown in FIG. The control device 32 which performs control to read or write data from the semiconductor memory device 31 by performing communication with the semiconductor device 31 is molded into a plastic substrate to form a plate 33. A plurality of contacts 35, 36, 37, 38, 39, 40, 41 and 42 in contact with the contacts of the contact heads of the IC card reading and writing apparatus are provided.

4 (b) shows an embodiment of the above-described IC card, through the CPU 43 and the contacts 37 and 38 which receive clock pulses and reset signals through the contacts 35 and 36. EEPROM control means 44 for receiving data and timing signals, and EEPROM control means for accessing the EEPROM 45 under the control of the CPU 43 while receiving a bias voltage through the terminal 39 ( 46), it is configured to receive electric power from the power supply terminal 40 and ground terminal 42 which are connected to the operating voltage supply terminal and the ground terminal of the contact head.

In the figure, reference numerals 47 and 48 each denote a ROM which stores a program for controlling the CPU 43 and a RAM constituting a work area.

Therefore, the contacts 35, 36, 37, 38, 39, 40, 41 and 42 provided in the IC card 30, or the contact pins of the IC card reader and write device, Because of the extremely small size, there is a problem that short circuits or poor contact are likely to occur. Nevertheless, the contacts of the IC card are exposed to the outside, so it is possible to easily clean the contacts by cloth or the like.However, the contact pins of the IC card reading and writing device are located in the tube body. For this reason, for example, it is proposed to perform a recovery operation of a contact using a cleaning member as shown in Japanese Patent Application Laid-Open No. 60-15887. (contact) is not secured.

In addition, IC cards exist in various standards, and there is a possibility that IC cards other than the standard are inserted incorrectly. When an IC card other than the standard is inserted, of course, even if it meets the standard, the IC card is accessed while the normal contact is not secured, and the data is read or written. There is a problem that the data and circuit means of the reading and writing apparatus are destroyed.

[Problem to Solve Invention]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is that a regular IC card is loaded and an IC card can be accessed only when a connection with an inserted IC card is normally performed. An IC card reading and writing apparatus is provided.

[Means for solving the problem]

In order to solve such a problem, in the present invention, an IC card reading and writing device having a contact head having a contact pin contacting a contact of an IC card and an access control means for controlling communication with the IC card. A voltage detection means for detecting a voltage of a contact pin connected to two terminals for supplying an operating voltage to the IC card, the voltage detected by the voltage detection means and a predetermined reference value are compared with each other. And a judging means for outputting a signal for stopping the access to the IC card in the access control means when it deviates from the above.

When a non-standard IC card is inserted and normal contact with the IC card is not made, the voltage between the terminals deviates from the reference value, so that the detection is stopped and the access to the IC card is stopped.

EXAMPLE

EMBODIMENT OF THE INVENTION Below, it demonstrates based on the Example which shows the detail of this invention.

FIG. 1 shows an embodiment of an IC card reading and writing apparatus, in which, reference numeral 1 denotes an IC card conveying means, and an IC card provided near the card insertion port 3 of the conveying path 2. It is comprised as the motor 5 which operates by the signal from the ad-detection means 4, and the roller 6 which connects to this motor 5, and is made | formed by the spring 8 centering on the rotating shaft 7; It is comprised so that the roller 6 may always add a force to the conveyance path 2 side.

Reference numeral 9 denotes a contact head, wherein a plurality of contact pins 10, 11, 12 are placed at positions opposing the contacts 35 to 42 of the IC card 30 when the IC card is stopped at a predetermined position. ) ---- (17), and the contact pins 10 to 17 are moved by the drive means 19 such as solenoids when the detector 18 detects that the IC card has reached a predetermined position. It is comprised so that it may contact with the contact 35-42 of IC card 30.

2 shows an embodiment of the IC card reading and writing apparatus, in which the reference numeral 20 in the figure is an operating voltage supply means, and contacts contacting the contacts 40 and the terminals 42 of the IC card 30. The pin 15 and 17 are supplied with a constant voltage suitable for driving the IC card 30.

Reference numeral 21 denotes an access control means for contacting the terminals 35, 36, 37, 38 and 39 of the IC card when no signal from the contact inspection means 23 described later is applied. The clock pulse, reset signal, timing signal, and bias voltage are supplied to the CPU 43 of the IC card 30 at the pins 10 to 14 for access, and the data is read from the semiconductor storage means 45. When the data is written into the semiconductor storage means 45 and the signal from the contact inspection means 23 is input, the access to the IC card is stopped.

Reference numeral 23 denotes the above-described contact inspection means, which includes voltage detection means 24 for detecting the voltage of the contact pins 15 and 17 in contact with the terminals 40 and 42 of the IC card, and the voltage. Judging means 25 for judging whether or not the predetermined voltage is a predetermined voltage and outputting a signal to the access control means 21, and outputting a signal immediately after the inspection, for example, an IC card, is determined. It is comprised as the test signal output means 26 which operates 25. As shown in FIG.

In this embodiment, the IC card 30 is inserted so that the contact pins 10, 11-17 of the contact head 9 have their respective contacts 35 of the IC card 30. When it contacts with (36)-(42), the operating voltage is supplied from the operating voltage supply means 20 to the IC card 30.

In this state, the voltage between the contact pins 15 and 17 is detected by the voltage detecting means 24 on the basis of the signal from the test signal output means 26, and this voltage is compared with the reference value by the determining means 25. Lose.

If the inserted IC card is a normal one, and the contact pins 10 to 17 and the contacts 35 to 42 of the IC card are in regular contact, the voltage between the terminals 15 and 17 is at a specified value. Therefore, the signal is not output from the contact inspection means 23, and the access control means 21 reads data from the IC card 30 or writes data into the IC card 30. As shown in FIG.

On the other hand, the inserted IC card is not a normal one, or the contact pins 10 to 17 of the contact head 9 and the contacts 35 to 42 of the IC card 30 are in normal contact. If it is short-circuited without a voltage, a signal is output from the contact inspection means 23 because the voltage between the contact pins 10 to 17 deviates from the reference value. For this reason, the access control means 21 stops the access to the IC card 30 and prevents the destruction of the data or the circuit due to the writing or reading of data out of standard.

In the above-described embodiment, the voltage between the terminals 40 and 42 for supplying the operating voltage is checked, but at least one contact connected to the contact of the IC card 30 is shown in FIG. The load resistor 28 is connected between the pin 14 and the access control means 21, and the voltage of the load resistor 28 is determined based on the operation signal from the test signal output means 26. Even if it detects by 24) and makes judgment by the determination means 25, the same effect is acquired.

In other words, when the inserted IC card conforms to the standard, and the contact pins 10 to 17 of the contact head 9 are in normal contact with the contacts 35 to 42 of the IC card 30, Since the specified current flows through the contact pins 10 to 17, the specified voltage is generated in the load resistor 28. However, when the IC card is out of the standard or the contact is poor or other terminals are shorted. If present, the current becomes small or an unusually large current flows, so that the voltage of the load resistor 28 deviates from the specified value.

In the above embodiment, the test signal is output immediately after the IC card is inserted. However, the test signal may be output when the access to data is stopped.

[Effects of the Invention]

As described above, in the present invention, an IC card reading and writing apparatus comprising a contact head having a contact pin in contact with a contact of an IC card, and an access control means for controlling communication with the IC card, When the voltage detection means for detecting the voltage of the contact pin connected to the two terminals supplying the operating voltage to the IC card and the voltage detected by the voltage detection means deviate from the reference value by comparing with a predetermined reference value. Since the access control means includes a determination means for outputting a signal for stopping access to the IC card, an IC card conforming to the standard is inserted, and is accessed only when the contact head and the IC card are firmly in contact with each other. It is possible to prevent the destruction of data or circuits by eliminating abnormal access.

Claims (2)

An IC card reading and writing apparatus, comprising: a contact head having a contact pin in contact with an IC card contact; and access control means for controlling communication with the IC card. A load resistor for connecting between at least one contact pin to be connected and the access control means; Operating voltage supply means for supplying an operating voltage to the IC card when the IC card is inserted and the contact pin of the contact head contacts each contact of the IC card; Voltage detecting means for detecting a voltage applied to the load resistor; Judging means for comparing the voltage detected by said voltage detecting means with a preset reference value and outputting a signal to stop said access to the IC card to said access control means when the detected voltage is out of the set reference value; IC card reading and writing apparatus comprising a. An IC card reading and writing apparatus according to claim 1, further comprising an inspection signal output means, wherein said determination means is operated by a signal from said inspection signal output means.