JP3492778B2 - Phone with sensor for illegal wiring check - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to illegal use in an IC card system, and more particularly to a telephone (reader / writer) capable of preventing leakage of electric signals to the outside and input of illegal signals from the outside.

[0002]

2. Description of the Related Art IC cards have been attracting attention as new information recording media, especially as information recording media to replace magnetic cards, and are becoming increasingly popular. The IC card is a small card equipped with an IC module in which a memory and electrodes are integrated. Conventionally, an IC in an IC card system in which the IC card is inserted into a telephone and used.
It is used as a prepaid card. An IC card system that uses a telephone by using an IC card is one in which a user purchases an IC prepaid card as needed, sets the card in a public telephone and makes a call, and is a reader / writer (R / W) public. The telephone receives an I signal
The frequency in the memory of the C card is read and continuous disconnection of the call is controlled according to the remaining frequency. However, as shown in FIG. 4, even if a wiring is connected to the terminals of the IC card and an IC breadboard (evaluation board) is used, there is a problem in that it can be used. In order to deal with this, conventionally, in the case of this system, in order to prevent leakage of an electric signal by connecting the illegal wiring to the terminal of the card and reading the electric signal to the outside, a telephone ( The method of installing at the entrance of the reader / writer was adopted.

[0003]

However, according to this conventional method, the public telephone requires a movable part for opening and closing the lid, which is apt to cause a failure and is easily tampered with by breaking the lid. There was a problem that it was possible to insert various cards. Further, there is a problem that it cannot be prevented if the illegal wiring itself from the IC card is extremely thin. Under the circumstances, the present invention is intended to provide a telephone (reader / writer) that has a simple structure, does not cause a failure, and can prevent electric signal leakage to the outside (outside the reader / writer). is there.

[0004]

In the telephone with a sensor for illegal wiring check of the present invention, an IC card is used by inserting an IC card into a card insertion port of the telephone and bringing a terminal of the IC card into contact with a contact pin of the telephone. A telephone in a card utilization system is provided with a sensor for electrically detecting the presence or absence of illegal wiring from an IC card inserted in the telephone, and the sensor is provided inside the telephone near the card insertion opening. So that it crosses the card passing surface,
Wired through a connecting portion capable of mechanically connecting and disconnecting electrical connection, the connecting portion capable of mechanically connecting and disconnecting electrical connection,
Except for the disconnection state of the connection part by a predetermined mechanical means such as passage of the IC card itself, the connection state is established, and the wiring of the sensor is electrically disconnected in the connection part other than the predetermined disconnection state. Is to detect illegal wiring. The above is characterized in that the IC card terminal and the telephone contact pin can be contacted only when the sensor determines that there is no illegal wiring.

[0005]

The telephone with sensor for illegal wiring check according to the present invention is configured as described above to allow an illegal person to leak an electric signal to the outside or input an illegal signal.
The existence of illegal wiring (electric wire) can be detected,
It is possible to prevent the use of an illegal IC card provided with such wiring. Since the contact between the IC card terminal and the telephone contact pin can be made only when the sensor determines that there is no illegal wiring,
The use of an IC breadboard (evaluation board) in which illegal wiring is connected to the terminals of the IC card cannot be used at all.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a telephone with a sensor for illegal wiring check according to the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a telephone with a sensor for illegal wiring check according to the embodiment, showing a case where a normal card without illegal wiring is inserted into the telephone, and the electric wiring of the sensor is cut (disconnected). State). In FIG. 1, 100 is a public telephone, 102 is a sensor section, 102A is wiring, 103 is a connection section, 103A is a connection section upper side, 103B is a connection section lower side, 104 is a contact, 105 is a terminal pin, 106 is a card insertion slot, 107A. , 107B are card rotation supporting parts, 110A is an illegal IC card, and 120 is an illegal wiring.

In the telephone 100 with a sensor for illegal wiring check of the present embodiment, as in the conventional case, after the IC card is inserted from the card insertion slot 106 of the public telephone 100, the rotation supporting portions 107A and 107B are used to perform a predetermined operation. Sent to the position and at a predetermined position, the terminal of the IC card and the terminal pin 105 of the contact 104 of the public telephone 100
This is a telephone of a telephone system using an IC card that is used in contact with and has a sensor unit 102 for checking illegal wiring. Sensor unit 102
Is wired through a connecting portion 103 capable of mechanically interrupting electrical connection so as to cross the IC card passage surface inside the telephone near the card insertion port, and as shown in FIG. When the card 110A is inserted, the wiring of the sensor unit 102 is electrically opened (disconnected state) at the connection unit 103, and the current does not flow in the sensor unit 102, which makes it possible to determine that there is defective wiring. is there. Then, the contact 104 is instructed that the connection with the terminal of the illegal IC card 110A is impossible.

The connecting portion 103 is composed of a connecting portion upper side 103A and a connecting portion lower side 103B made of a conductive material,
When the card 110 passes through the connecting portion 103, the connecting portion upper side 103A and the connecting portion lower side 103B are easily separated by the C card 100, and the connecting portion upper side 103A and the connecting portion lower side 103B are separated. If there is nothing in between, the connection state can be maintained. Connection 1
03 is a card rotation support portion 107B and a card insertion slot 10
Located between 6 FIG. 2 is a plan view including the connecting portion 103 from the card insertion opening 106 side, and FIG.
FIG. 2B shows a state in which the upper portion of the connecting portion 103A and the lower portion of the connecting portion 103B are electrically short-circuited in a state in which the C card is not inserted. It shows that the connection portion lower side 103B is electrically disconnected. The connecting portion upper side 103A has a flat plate shape, and in the case of FIG. 2A, is in linear contact with the connecting portion lower side 103B. The material is a relatively hard material such as a copper plate. Lower connection part 103B
May have a square columnar shape or a cylindrical shape, but is not limited thereto.

The operation of the sensor unit 102 will be described below with reference to FIG. 3, and the principle of detecting the presence / absence of illegal wiring from the IC card will be briefly described. FIG. 3 is a view showing a main part of the telephone 100 with a sensor for illegal wiring check according to the present embodiment.
In FIG. 3, 110 is an authorized IC card, and 110B is an unauthorized IC card having an unauthorized wiring 120A. First, when the IC card is not inserted into the public telephone 100 as shown in FIG. 3A, the connection part 103 of the sensor part 102 includes the connection part upper side 103A and the connection part lower side 10A.
3B is in a connected state, and a current of a predetermined value flows through the sensor section. Next, as shown in FIG. 3B, when the IC card 110 is inserted from the card insertion opening 106, the IC card 110 causes the connecting portion 103 to move to the upper connecting portion 103A.
And the connection portion lower side 103B are separated by a mechanical force. Therefore, the wiring of the sensor unit 101 is electrically opened (disconnected state) at the connection unit, and no current flows in the sensor unit. When the IC card 110 is inserted into the card, it is known in advance when the connection section 103 disconnects the wiring. Therefore, it is determined that this is the disconnection state at the connection section by the IC card 110. Then, as shown in FIGS. 3C and 3A, when the IC card 110 is inserted and reaches a predetermined position, if the inserted IC card is a legitimate one without illegal wiring, the connecting portion 103 is again provided. Upper connection part 103A
Is connected to the connection portion lower side 103B, the wiring of the sensor portion 102 is in a connected state, and a current having a predetermined value flows in the sensor portion 102. As a result, it is determined that there is no illegal wiring, and the terminal pin 105 of the contact 104 is brought into contact with the terminal of the card as shown in FIG.
The command from 2 enables the use of the telephone. On the other hand, the IC card 110A provided with the illegal wiring 120A
3D, since there is illegal wiring, as shown in FIG. 3D, even after the IC card 110A is inserted at a predetermined position, the illegal wiring 120A causes the upper portion 103A of the connecting portion 103A and the lower portion of the connecting portion 103A to be connected. Since it remains separated from the side 103B, the wiring of the sensor unit 101 is electrically opened (disconnected state) at the connection portion, and no current flows in the sensor unit. It is understood that this is not the predetermined disconnection state when the IC card is inserted. Therefore, since it is determined that there is illegal wiring and the terminal pin is not brought into contact with the terminal of the card in response to a command from the sensor unit 102, a public telephone cannot be used. The position of the IC card can be confirmed mechanically or optically, and the IC card itself can be connected to the connecting portion 1.
The period in which the wiring is disconnected at 03 is known in advance. Also,
The arrow in FIGS. 1 and 3 indicates the contact 1 from the sensor section 102.
It shows the command to 04.

[0010]

The present invention uses the above-mentioned sensor for illegal wiring check, does not cause a failure unlike the conventional public telephone, and changes the signal of the sensor.
It is possible to detect the presence or absence of unauthorized wiring for the purpose of leaking electrical signals to the outside or inputting unauthorized signals from the outside. As a result, the supply of the electric signal to the illegal wiring can be cut off, and the leakage of the electric signal of the IC card to the outside and the input from the outside can be reliably prevented. Further, by having such a structure for the connecting portion that mechanically connects and disconnects the wiring of the sensor, the sensor portion can have a relatively simple structure.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a telephone with a sensor for illegal wiring check according to an embodiment.

FIG. 2 is a schematic plan view for explaining a connecting portion.

FIG. 3 is a diagram for explaining the operation of a telephone with a sensor for illegal wiring check.

FIG. 4 is a diagram showing an example of an IC card having illegal wiring.

[Explanation of symbols]

100 public telephone 102 sensor 102A wiring 103 connection 103A Connection part upper side 103B Connection part lower side 104 contacts 105 terminal pin 106 card slot 107A, 107B Card rotation support 110 IC card 110A, 110B Illegal IC card 120, 120A Illegal wiring

Claims (2)

(57) [Claims] 1. A telephone in an IC card using system in which an IC card is inserted into a card insertion slot of a telephone and a terminal of the IC card and a contact pin of the telephone are brought into contact with each other. A sensor for electrically detecting the presence or absence of illegal wiring is provided, and the sensor can mechanically connect and disconnect the electric connection so as to cross the IC card passage surface inside the telephone near the card insertion slot. The connection portion, which is wired through the connection portion and is capable of mechanically connecting and disconnecting the electrical connection, is in a connection state except the disconnection state of the connection portion by a predetermined mechanical means such as passage of the IC card itself. With a sensor for illegal wiring check characterized by detecting illegal wiring when the sensor wiring is electrically disconnected at the connection part other than the predetermined disconnection state Telephone. 2. The telephone set with a sensor for illegal wiring check according to claim 1, wherein the contact between the IC card terminal and the telephone contact pin can be made only when the sensor determines that there is no illegal wiring.