JPS6361390A - Contactless connecting system for ic card or the like - Google Patents

Abstract

PURPOSE:To eliminate a contact by a conductor, to supply a power and to transmit and receive a signal with high reliability by connecting the card of an IC card, etc., to a reader or writer with a mutual induction action. CONSTITUTION:When a card 1 is inserted into the inserting part 5 of the reader or writer 4 and an alternating current signal oscillator 7 for excitation is operated, a power supplying coil 6 is excited and the magnetic force line passes through the internal part of a coil 2 for receiving and supplying a power. Thus, an alternating current electricity is generated at the coil 2 for receiving and supplying the power, and a power circuit 8 rectifies, stabilizes the AC current and makes the current into a power source. When modulation is executed to the data with a frequency different from the oscillation frequency of an alternating current signal oscillator 6 for excitation, the data can be transmitted and received by overlapping to the coil 6 for supplying the power and the coil 2 for receiving and supplying the power.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an electrical connection method between an IC card or the like and a reading or writing device thereof, and in particular: a non-contact connection that enables electrical connection without contacts. Regarding the method.

[Technical background of the invention and its problems] Conventionally, when a card such as an IC card or an optical card is inserted into a reading or writing device for use, the connection between the card and the device is made using conductors provided on both sides. This was accomplished by making contact with the terminals upon insertion, which allowed the device to send and receive power and other signals to the cart. For example, as shown in FIG.
In addition to having a built-in IC card reading or writing device [12], by inserting an IC card IO into
The power supply terminal 13 of No. 2 and the power reception terminal 11 of the IC card 10 were connected to each other so that power was supplied to the IC card 10.

In this way, the conventional power supply method for IC cards, etc. is a contact method that is made possible by the contact of each terminal 11. There is a possibility that the alloying or dust in the atmosphere may cause a contact failure in the contact portion, making it impossible to supply power.

[Object of the Invention] The present invention has been made to eliminate the above-mentioned drawbacks of the conventional technology, and provides a contactless connection method that enables highly reliable electrical connection between an IC card, etc. and its reading or writing device. This is what we intend to provide.

[Summary of the Invention] In order to achieve such an object, in the contactless connection method of an IC card or the like of the present invention, a secondary coil is provided in a card such as an IC cart, and a secondary coil is provided in the card reading or writing device. A primary coil is provided at a position opposite to the secondary coil when the card is inserted, and when the card is inserted into the reading or writing device, the card and the reading are caused by induction between the surface primary coil and the secondary coil. Alternatively, it is characterized in that it is electrically connected to a writing device.

[Embodiments of the Invention] An embodiment in which the connection method of the present invention is applied to a power supply method to an IC card will be described below with reference to the drawings.

In FIG. 1, a car F 2 such as an IC card includes a power receiving coil 2 which is a secondary coil and a power supply circuit 3 connected to the power receiving coil 2. The power receiving coil 2 is provided so that the direction of its magnetic core coincides with the thickness direction of the card. The power supply circuit 3 is composed of a diode and the like, and supplies *g for the operation of the card by rectifying and stabilizing the alternating current voltage generated in the power receiving coil 2. - On the other hand, the card 1 reading or writing device 4 is provided with a power supply coil 6 as a primary coil facing inside the insertion portion 5 into which the card 1 is inserted. An excitation AC signal oscillator 7 is connected to the power supply coil 6 . The power supply coil 6 is located at a position facing the power reception coil 2 of the card 1 when the card 1 is inserted into the insertion section.
The magnetic core of the power supply coil 6 and the magnetic core of the power supply coil 6 are installed in a straight line.

In such a configuration, the card 1 is inserted into the insertion section 5 of the reading or writing device 4, and the excitation AC signal oscillation D
7 is activated, the power supply coil 6 is excited, and its magnetic lines of force also pass through the inside of the power reception coil 2. As a result, alternating current electricity is generated in the power receiving coil 2, and the am circuit 8 rectifies and stabilizes this alternating current electricity to use it as a power source. In this way, power can be supplied to the card 1 and the reading or writing device 4 without contact, and data in the card can be read or written.

In the above embodiment, the method of supplying power to the IC card has been described, but when transmitting and receiving other data, the data is modulated at a frequency different from the oscillation frequency of the excitation AC signal oscillator 6 for power supply, and the power supply is It can be superimposed on the power receiving coil and the power receiving coil for transmission and reception. Of course, it is also possible to provide coils on the card side and on the device side, separately from the power supply/reception coils, and use them to perform data-only transmission and reception.

[Effect of the invention] As is clear from the above explanation, in the present invention, I
To create a highly reliable IC card that connects a card such as a C card and its reading or writing device by mutual induction, making it possible to supply power and send and receive signals without having conductor contacts. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the non-contact connection method of the present invention,
FIG. 2 is a diagram showing a conventional connection method. l・・・・・・Card 2・・・・・・Power receiving coil (secondary coil)
３・・・・・・・・・Power circuit

Claims (1)

[Claims] A secondary coil is provided on a card such as an IC card, and a primary coil is provided in a position where the secondary coil faces the card when the card is inserted in the card reading or writing device, and the card is inserted into the reading or writing device. A non-contact connection method for an IC card, etc., characterized in that when the card is read or written, the card and the reading or writing device are electrically connected by induction between the primary coil and the secondary coil.