JPH1155158A - Portable radio communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve security when an owner carries or preserves portable radio communication equipment such as an ID card, for example, provided with an antenna circuit for tuning a prescribed frequency so as to communicate a radio signal at a prescribed frequency through the antenna circuit. SOLUTION: In a system for communicating the radio signal at a prescribed frequency f1 between a fixed station 4 provided with an antenna T and an ID card 1, for example, the base body of the ID card 1 is constituted of a main body part 2 and an attaching/detaching part 3 detachably connected to the main body part 2 and by providing an antenna circuit A over the main body part 2 and the attaching/detaching part 3, only in the state of connecting the main body part 2 and the attaching/detaching part 3, the antenna circuit A is formed and tuned at the prescribed frequency f1. In this case, the main body part 12 is provided with a radio part 11 for controlling radio communication and a data part 12 equipped with a memory or the like, and the antenna circuit A is constituted of capacitors C1, C2 and C3 and a coil L1 or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable radio communication device such as an ID card having an antenna circuit tuned to a predetermined frequency and communicating a radio signal of the predetermined frequency by the antenna circuit. The present invention relates to a portable wireless communication device that improves security by being configured to be separable into a main unit and a detachable unit.

[0002]

2. Description of the Related Art A portable radio communication device such as an ID card is provided with an antenna circuit tuned to a predetermined frequency, and a radio signal of the predetermined frequency is communicated by the antenna circuit. For example, in an ID card, each card stores an identifier (ID data) for identifying the owner of the card, and is used for, for example, authentication of a person who intends to enter a room that can be used only by a specific person. Have been. That is, the ID card carried by the person who is going to enter the room receives an inquiry signal wirelessly transmitted from a fixed station installed at the entrance of the room or the like,
In response to this inquiry, the ID data stored therein is wirelessly transmitted to the fixed station. This allows
At the fixed station, based on the received ID data,
It authenticates whether the person who carries the card can be put into the room.

[0003]

However, the above-mentioned portable radio communication apparatus has a drawback that, for example, when a card is lost, the card is easily used by another person who picked up the card. there were. In addition, portable wireless communication devices such as ID cards generally store highly confidential data in many cases. For example, such cards are passed on to other people's hands, and the highly confidential data is used without permission. There was a problem that it was done. For these reasons, there has been a demand for improving the security of the portable wireless communication device.

Incidentally, for example, an ID card having only a memory for storing ID data of an owner and a wireless communication function does not have a key for inputting data, and the performance of a CPU is not so excellent. For this reason, in many cases, it is difficult to provide a lock function for improving security by authenticating password data and the like, and therefore, there has been a particularly strong demand for such cards to improve security.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and includes a portable radio communication system having an antenna circuit tuned to a predetermined frequency and communicating a radio signal of the predetermined frequency by the antenna circuit. It is an object of the present invention to provide a portable wireless communication device capable of improving security when an owner carries the device or stores the device.

[0006]

In order to achieve the above object, a portable radio communication apparatus according to the present invention includes an antenna circuit tuned to a predetermined frequency, and communicates a radio signal of the predetermined frequency by the antenna circuit. The portable wireless communication device was configured as follows. That is, the base of the device is composed of a main body and a detachable unit detachably connected to the main unit, and the antenna circuit is provided over the main unit and the detachable unit, so that the main unit and the detachable unit are separated from each other. Only in the connected state, the antenna circuit is formed to tune to the predetermined frequency.

Therefore, unless the portable radio communication device has a main body and a detachable portion, the device cannot communicate the radio signal of the predetermined frequency. If the device is lost, it is possible to prevent the device from being used by another person who has picked up only the attaching / detaching portion. Further, for example, even when the main unit and the detachable unit have been lost, if these devices do not reach the hand of the same person, it is possible to prevent the device from being used by the other person. . Thus, the security of the portable wireless communication device can be improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment according to the present invention will be described with reference to the drawings. FIG. 1 shows an example of a system using a portable wireless communication device 1 according to the present invention. In this example, a case where an ID card is used as the portable wireless communication device 1 will be described. The system shown in FIG. 1 includes an ID card 1 storing an identifier (ID data) for identifying an owner, and a fixed station 4 for performing wireless communication with the ID card 1. The fixed station 4 has an antenna T for transmitting and receiving a radio signal of a predetermined frequency f1.
For example, an inquiry signal is wirelessly transmitted to the ID card 1, and ID data wirelessly transmitted from the ID card 1 is received and authenticated in response to the inquiry.

The base of the ID card 1 comprises a main body 2 and a detachable section 3 detachably connected to the main section 2. In FIG. 1, the main body 2 and the detachable section 3 are connected. FIG. The ID card 1 includes a wireless unit 11 for controlling wireless communication processing by a CPU or the like, a data unit 12 having a memory or the like, and capacitors C1, C2, and C3.
And a coil L1. Note that the data section 1
2 stores the above-described ID data, and a wireless unit 11 is connected to the data unit 12.

In this embodiment, the above-mentioned capacitors C1, C
2, C3 and the coil L1 constitute an antenna circuit A.
Communicates the radio signal of the predetermined frequency f1 with the fixed station 4. That is, the antenna circuit A is configured to tune to the predetermined frequency f1.

As shown in FIG. 1, the antenna circuit A is provided over the main body 2 and the detachable part 3. That is, in this example, the capacitor C3 and the coil L1
Is provided in the main body 2. One of the two electrode plates constituting the capacitor C1 is provided in the main body 2, and the other is provided in the attachment / detachment section 3. Similarly, one of the two electrode plates constituting the capacitor C <b> 2 is provided in the main body 2, and the other is provided in the detachable unit 3.

The one electrode plate of the capacitor C1 is connected to the radio section 11 of the main body 2 via a coil L1 by a conductor, and the one electrode plate of the capacitor C2 is connected to the radio section 11 by a conductor. . Further, a terminal a provided on a conductor of the former coil L1 on the radio section 11 side and a terminal b provided on the latter conductor are connected via a capacitor C3. In addition, in the attaching / detaching portion 3, the capacitor C
The other electrode plate of 1 and the other electrode plate of the capacitor C2 are connected via a conductive wire.

For example, as shown in FIG. 2, when the two cards of the main body 2 and the detachable section 3 are separated from each other, the above-described capacitors C1 and C2 are not formed. The circuits of the unit 2 and the attaching / detaching unit 3 do not tune to the predetermined frequency f1, and cannot communicate a radio signal with the fixed station 4. That is, the main unit 2 and the detachable unit 3
In a state in which the capacitor C1 and the capacitor C2 are separated from each other, the tuning circuit is formed only from the capacitor C3 and the coil L1 in the main body 2, for example.
The frequency tuned by the tuning circuit greatly deviates from the predetermined frequency f1, and the antenna sensitivity is substantially reduced, so that it becomes impossible to transmit or receive radio signals as radio waves with the fixed station 4.

For example, as shown in FIG.
In a state in which the two cards of the card and the attaching / detaching unit 3 are overlapped and connected, the above-described capacitors C1 and C2
Is formed, whereby the antenna circuit A is formed and tuned to the predetermined frequency f1.
In the ID card 1 in which the base station and the detachable unit 3 are connected, the fixed station 4
Wireless communication can be performed with the.

As described above, the substrate of the ID card 1 is divided into the main body 2 and the attaching / detaching section 3, and the antenna circuit A is formed only when the main body 2 and the attaching / detaching section 3 are connected to each other so as to have a predetermined frequency. For example, even if only the main body 2 or only the attaching / detaching part 3 has passed over to another person's hand, the other person cannot use the ID card 1,
From this point, security can be improved.

Also, for example, even if the owner of the ID card 1 has lost the main body 2 and the detachable part 3,
If the main unit 2 and the detachable unit 3 do not reach the hand of the same person, the other person cannot use the ID card 1, so that security can be improved in this respect. That is, when the owner of the ID card 1 stores the card or carries the card,
For example, by dividing and holding the ID card 1 such that the main body 2 and the detachable portion 3 are stored or carried in different places, the main body 2 and the detachable portion 3 can be held in the same hand of another person. It can be prevented from being used across, and the like, whereby security can be ensured.

Further, in the case of an ID card having only a CPU or a memory for performing simple processing as in the above-described embodiment, for example, a lock function for authenticating password data is required because a great load is imposed on the CPU. In many cases, it is difficult to provide a security device. For this reason, a novel device configuration in which the card substrate itself is divided to improve security as in the present invention is a particularly effective means for ensuring security.

An antenna circuit tuned to a predetermined frequency is provided over a main body and a detachable part,
Any circuit configuration may be used as long as the antenna circuit is formed and tuned to a predetermined frequency only when the main unit and the detachable unit are connected. In addition, for example, as in the above embodiment, each of the two electrode plates constituting the capacitor is separately provided in the main body portion and the detachable portion,
When the capacitor is formed in a state where the main body and the detachable portion are connected, when the main body and the detachable portion are connected, the circuit element of the main body and the circuit element of the detachable portion are directly connected. This is preferable in that the main unit and the attaching / detaching unit can be attached and detached without causing circuit elements to be worn out due to the contact since the contact does not occur.

Here, in the above-described embodiment, the case where the portable radio communication device is constituted by one main body and one detachable portion is shown, but the number of components constituting the portable radio communication device is plural. Any number may be used as long as the antenna circuit tuned to the predetermined frequency is provided over the plurality of components as described above. That is,
For example, in the case of an ID card, a configuration in which the card is divided into two cards as in the above embodiment may be used.
The configuration may be such that the antenna circuit is divided into an arbitrary number of cards such as four or four, and the point is that the antenna circuit described above is formed only in a state where the plurality of cards are connected. . Further, the method of dividing the portable wireless communication device into a plurality of components may be arbitrary.

Further, in the above embodiment, an ID card has been described as an example of a portable wireless communication device.
For example, the present invention may be applied to any portable wireless communication device such as an IC card, a pager, and a portable wireless telephone terminal. For example, when the present invention is applied to an IC card, a pager, a portable wireless telephone terminal, or the like, the security is ensured by the present invention. Therefore, it is not always necessary to provide the above-described lock function or the like in these devices. It is possible to reduce the burden of password authentication processing and the like by the CPUs provided in these devices.

In addition, when the present invention is applied to a card such as an ID card or an IC card, security can be ensured by forming the base of the card from a plurality of divided components. There is no need to provide the card with a lock function or the like, which makes it possible to reduce the thickness and weight of the card, reduce power consumption, and the like. Similarly, it is possible to reduce the performance of the CPU, reduce the number of components constituting the card, and the like, so that the cost of the card can be reduced. In addition, the predetermined frequency of the wireless signal communicated by the portable wireless communication device may be arbitrarily set according to the state of a system to which the portable wireless communication device is applied.

[0022]

As described above, according to the portable radio communication apparatus according to the present invention, the portable radio communication apparatus having the antenna circuit tuned to the predetermined frequency and communicating the radio signal of the predetermined frequency by the antenna circuit. In the device, since the base of the device is composed of a main body portion and a detachable portion, and is configured to be able to communicate the radio signal of the predetermined frequency only in a state where the main body portion and the detachable portion are connected, for example, the device The security can be improved when the owner carries, stores, or the like. That is, for example, even if the owner of the portable wireless communication device loses the main unit and the detachable unit, if the main unit and the detachable unit do not reach the same person's hand, the other person will A portable wireless communication device cannot be used, and in this respect security can be improved compared to, for example, a conventional device composed of a single base.

[Brief description of the drawings]

FIG. 1 is an example of a system using a portable wireless communication device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a state in which a main body unit and a detachable unit of the portable wireless communication device are separated.

FIG. 3 is a diagram illustrating a state in which a main body unit and a detachable unit of the portable wireless communication device are connected.

[Explanation of symbols]

1. Portable radio communication device, 2. Main unit, 3. Removable unit, 4. Fixed station, T. Antenna, 11. Radio unit, 12. Data unit, C1, C2, C3. Capacitor, L1 coil

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuzo Miura 3-14-20 Higashinakano, Nakano-ku, Tokyo Kokusai Denki Co., Ltd. Inside the corporation

Claims (1)

[Claims] 1. A portable wireless communication device having an antenna circuit tuned to a predetermined frequency and communicating a radio signal of the predetermined frequency by the antenna circuit, wherein a base of the device is detachably connected to the main body and the main body. By providing the antenna circuit over the main body and the detachable portion, the antenna circuit is formed only in a state where the main body and the detachable portion are connected, and the antenna circuit is provided with the predetermined frequency. A portable wireless communication device characterized in that it is tuned.