JPS6351194A - Noncontact alternate transmission and reception system information card - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is applicable to office automation.
Automation, OA), Factory Automation
The present invention relates to information cards such as IC cards used in fields such as .

(Prior Art) A general information card has an integrated circuit such as a semiconductor memory built into a card body made of plastic or the like, and a contact terminal for connecting to an external device is provided on the card surface.

Conventionally, technologies in this field include ■Nikkei Mechanical, (1985-10-21) Nikkei McGraw-Hill Co., Ltd.
c card JP, 1e7-170, Nikkei Electronics, (1985-12-2) Nikkei McGraw-Hill Co., Ltd.
IG card market/Electronics manufacturers pouring in (top) JP, 275-292, ■Nikkei Electronics, (1985-12-6) Nikkei McGraw-Hill rElectronics manufacturers pouring into the IC card market (bottom)'' P, 249-2Ei2 , ■Jitkai Showa 56-1
There was one described in Publication No. 09111i6. The configuration will be explained below using diagrams.

FIG. 2 is a block diagram showing an example of the configuration of a conventional information card, and FIG. 3 is a perspective view showing an example of its implementation.

In FIG. 2, 1 is an external device for reading and writing information, and 2 is an information card. DC power supplies Vc and E are supplied from the external bag 1 to the information card 2, and the external device 1 and information card 2 person, output signal l10
1 to l10n are exchanged. As shown in FIGS. 2 and 3, the information card 2 has a rectangular card body 3 made of plastic or the like, and the card body 3 has a plurality of power and signal ports exposed on its surface. contact type terminal 4
is provided, and an electronic integrated circuit (hereinafter referred to as IC) is provided inside.
) 5 is provided. [5 is semiconductor memory 6
and a microprocessor 7 that controls writing and reading of information to and from the memory 6.

When this type of information card 2 is inserted into the external device 1, the terminals 4 on the card 2 side come into contact with the terminals on the external device 1 side, and the information stored in the memory 6 is transferred to the external device through these terminals 4 etc. Read with l or external bag 21! ■
information on the side is written into the memory 6.

(Problem to be Solved by the Invention) However, in the information card with the above configuration, the terminal 4 is exposed to the outside, so the terminal joint may be susceptible to poor contact due to dirt, oxidation, corrosion, wear, etc., or leakage current. In addition, the IC5 was destroyed due to static electricity and external voltage, resulting in reliability problems.

The present invention provides an information card using a non-contact alternate transmission/reception method that solves the problem of low reliability that the prior art had.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides information reading,
Alternatively, in an information card that performs reading and writing, there is a transmission medium that supplies power from the outside and exchanges signals with the outside without contact, and a transmission medium that has a power storage function and receives power that is input through the transmission medium. A power supply circuit that converts to DC power, a switch circuit that is connected to the transmission medium and switches the signal path based on a switching signal, a reception circuit that receives external signals input through this switch circuit, and a memory that stores information. a memory control circuit that controls the operation of the memory based on the output of the receiving circuit and outputs an output signal and the switching signal at a predetermined timing; and a memory control circuit that transmits the output signal of the memory control circuit to the transmission medium through the switch circuit. A transmitting circuit for transmitting data to a card is housed in a substantially rectangular card body.

(Function) According to the present invention, since the information card is configured as described above, the transmission medium supplies power and sends/receives signals without contact, and the power supply circuit converts the power from the transmission medium into DC power. Converts and supplies it to internal circuits. The switch circuit switches between a reception path to the reception circuit and a transmission path from the transmission circuit based on a switching signal from the memory control circuit. This makes it possible to send and receive signals without contact6, thereby eliminating the above-mentioned problem.

(Embodiment) FIG. 1 is a block diagram of the structure of an information card of a non-contact alternate transmission/reception system showing an embodiment of the present invention.

In FIG. 1, IO is an external device, and an information card 20 is inserted into this external device 10.

The external device 10 has a transmitting circuit 11 and a receiving circuit 12,
A transmission medium 14 is connected to it via a switch circuit 13. The transmitting circuit 11 is a circuit that converts the input signal Si into a transmission signal, and provides the transmission signal and power source power to the transmission medium 14 through the switch circuit 13, and the receiving circuit 1
2 is a circuit that converts the transmission signal input through the switch circuit 13 into the original output signal So. The switch circuit 13 is a circuit that connects the transmitting circuit 11 and the transmission medium 14 or the transmission medium 14 and the receiving circuit 12 using a switching signal S1. The transmission medium 14 transmits power to the information card 20
In addition to contactless transmission to the information card 20 side, transmission signals are also transmitted and received to and from the information card 20 side in a contactless manner.

On the other hand, the information card 20 has a substantially rectangular card body 21 made of plastic.
Inside, there is provided a transmission medium 22 for power transmission and signal transmission, which faces the transmission medium 14 on the external device IO side, and also houses an I(:23).
It has a power supply circuit 24 and a switch circuit 25 connected to a transmission medium 22, and the switch circuit 25 has a reception circuit 26.
A memory control circuit 28 and a memory 29 are connected via a transmission circuit 27.

The power supply circuit 24 is a circuit that has a power storage function and converts the power supplied manually through the transmission medium 22 into a stabilized DC voltage Vdc. The switch circuit 25 is the memory control circuit 2
Based on the switching signal S2 of 8, the transmission medium 22 and the receiving circuit 2
6 or the transmission circuit 27 and the transmission medium 22. The receiving circuit 26 converts the transmission signal input through the switch circuit 25 into the original signal and supplies it to the memory control circuit 28. The transmitting circuit 27 converts the output signal of the memory control circuit 28 into a transmission signal and sends it to the original signal. This circuit supplies the signal to the transmission medium 22 through the switch circuit 25. The memory control circuit 28 is composed of, for example, a microprocessor, and is a circuit that controls reading and writing of the memory 29, outputs a switching signal S2, or performs serial/parallel conversion of data. The memory 28 is a medium for storing various types of information, including read-only memory (ROM), writable ROM (PRO), electrically erasable and writable RO)! (EEPRO) I), ultraviolet erasable and writable ROM (EPROM), etc.

Note that the input signal Si in the external device H10 is an initial setting (initial setting) of the memory control circuit 28 on the information card 20 side, a control signal for reading and writing information, etc.
Further, signals to be written into the memory 29 are serialized. In addition, the output signal So is the memory 2
9, the operation confirmation signal inside the information card 20, etc. are serialized in the memory control circuit 28.

Next, the operation shown in FIG. 1 will be explained with reference to the time chart of the fourth UA.

When the information card 20 is inserted into the external device 10, the charging signal for power source power sent from the transmitting circuit 11 on the external device IO side is transmitted to the switch circuit 13. and contactless transmission medium 14
．． 22 to the power supply circuit 24.

The power supply circuit 24 starts charging according to the input charging signal, and when 1 has elapsed within the minimum time for the power supply circuit 24 to become operational, it outputs a DC voltage Vdc to supply power to each circuit in the card body 21. Supply as.

The card control signal, which is the input signal Si on the external device IO side, is converted into a transmission signal by the transmission circuit 11, and then transmitted to the switch circuit 25 on the information card 20 side through the switch circuit 13 and the non-contact transmission medium 14.22. be done. Receiving circuit 2
6 receives external information through the switch circuit 25, converts it into the original signal, and supplies it to the memory control circuit 28.

After specifying an address and writing information to the memory 29 based on external information included in the input signal, such as write information, the memory control circuit 28 gives a write completion signal to the transmitting circuit 27 and also outputs a switching signal. S2 is output to switch the switch circuit 25 to the transmitting circuit 27 side. In synchronization with this, the switch circuit 13 on the external side 10 is also switched to the receiving circuit 12 side by the switching signal S1. In addition, the receiving circuit 2
6 finishes receiving the external information, the power supply circuit 24 shifts from charging to discharging operation and continues to supply the DC voltage Vdc.

The transmitting circuit 27 converts the card information output from the memory control circuit 28 into a transmission signal and sends it to the switch circuit 25 and the transmitter circuit 27 after a guard time of 2 has elapsed from receiving external information to transmitting the card information. It is transmitted to the external device to side through the transmission medium 22.14.

The card information transmitted to the external device 10 side is received by the receiving circuit 12 through the switch circuit 13, where it is converted into the original signal and sent out in the form of the output signal So.

Thereafter, after the transmission of power and external information from the external device 10 to the information card 20 and the communication of the card information from the information card 20 to the external device 10 are repeated a predetermined number of times, the information card 20 is It is removed from the external device 10 and the operation ends.

5 to 11 are diagrams embodying the information card of FIG. 1.

Of these, FIG. 5 is a block diagram of the configuration of an information card using a magnetic coupling alternate transmission/reception method, and FIGS. 6 to 8 are plan views showing examples of mounting the information card 20 in FIG. 5.

In the circuit shown in FIG. 5, the transmission medium 14.22 is composed of magnetic coupling coils 14A and 22A, and the power supply circuit 24 is composed of a rectifier charging circuit 24A and a secondary battery (battery) 24B. Here, the secondary battery 24B has an IC: 23
It is buried inside the outer card body 21. Power transmission and signal exchange are performed contactlessly through the magnetic coupling coils 14A, 22A.
The power supplied to the information card 20 side through A is converted into a DC voltage Vdc by a rectifier charging circuit 24A, and is stored in a secondary battery 24B.

In FIG. 6 showing a mounting example of the information card 20 in FIG. 5, the magnetic coupling coil 22A is formed in a circular shape and
It is buried inside.

In the implementation example shown in FIG. 7, the center lx of the long side of the card body 21
A circular magnetic coupling coil 22A is disposed with its center point at the intersection of the center line Y of the short side and the center line Y of the short side. If the magnetic coupling coil 14A on the external device 10 side is placed opposite to this,
No matter which direction the information card 20 is inserted, ie, up/down, left/right, or reversed, the same operation is always possible.

In the implementation example shown in FIG. 8, a substantially rectangular magnetic coupling coil 22
A is arranged symmetrically on the center lines X and Y, and has the same advantages as in FIG.

Figure 9 is a block diagram of the configuration of an information card using the capacitive coupling alternate transmission/reception method, Figures 10 (1), (2), and Figure 11 (1).
, (2) are a plan view and a vertical sectional view showing an example of mounting the information card 20 in FIG. 5.

In the circuit of FIG. 9, the magnetic coupling coils 14A and 2 of FIG.
2A is each pair of capacitive coupling electrode plates 14B1, 14B2 and 2
2B+ and 22B2, but perform the same operation as in FIG. 9. In addition, each pair of electrode plates 14B1.

Pole plate 14B2 for each one of 14th 2 and 22B1.22B2
and 2282 are each grounded, forming a return loop.

In FIGS. 1O (1) and (2) showing the mounting example in FIG. 9, rectangular electrode plates 22Bl and 22B2 having substantially the same shape are embedded in the card body 21. Also, Figure 11 (1
), (2), the rectangular electrode plate 22 has almost the same shape.
B1.22B2 are arranged symmetrically on the center lines X and Y of the card body 21, and if the electrode plate 14B1.14B2 on the external device 10 side is also arranged opposite to this, the information card 2
The same operation is possible no matter which direction 0 is inserted.

Each of the above embodiments has the following advantages.

■ Since the terminals of the internal circuit are not exposed to the outside as in the past, and power can be supplied and signals can be output without contact, there is no need to expose the internal circuit terminals to the outside. There is no effect of poor contact due to wear etc. Furthermore, not only is there no failure or malfunction due to leakage current, there is no need to protect the internal circuitry from external voltage or static air. Therefore, high reliability can be obtained.

■ Completely sealed structure improves explosion-proof and waterproof properties. Therefore, in addition to normal OA equipment and FA functions,
It can also be applied to equipment in harsh environments or in locations that require explosion-proof measures.

■ Built-in rechargeable power supply circuit 24 eliminates the need for battery replacement.

■ Transfer the transmission medium 22 on the information card 20 side to the card body 21.
If the information card 2o is arranged symmetrically with respect to the center lines X and Y, and the transmission medium 14 on the external device lo side is arranged opposite to this, the information card 2o can be moved in any direction, i.e., "two down, left and right,"
It can operate even if it is inserted into the external device 10 with the front side reversed (m
It is. In this way, there is no restriction on the insertion direction of the information card 20, which improves usability.

Note that the present invention is not limited to the illustrated embodiment, and various modifications are possible. For example, the transmission medium 22 may be configured with something other than the magnetic coupling coil 22A or the polar plate 22B1.2282, the shape or arrangement of the transmission medium 22 may be changed to something other than shown, or the circuit configuration within the IC 23 may be changed. It is also possible to transform it into other methods such as a hybrid method.

(Effect of the invention) As described in detail above, according to the present invention.

Since power input and signal output are performed through a transmission medium that is not exposed to the outside, there is a risk of poor contact with external devices, malfunctions due to leakage current, and damage to internal circuits due to static electricity or external voltage. can be prevented. Moreover, if the transmission medium is arranged symmetrically with respect to the center line of each side of the card body, there is no restriction on the direction in which the information card can be inserted, and it can be expected that the usability will be improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the configuration of an information card using a non-contact alternate transmission/reception method showing an embodiment of the present invention, FIG. 2 is a block diagram of the configuration of a conventional information card, and FIG. A perspective view of the card, FIG. 4 is a time chart showing the operation of FIG. 1, FIGS. 5 to 11 show specific examples of FIG. 1, and FIG. 5 is a magnetic coupling alternate transmission and reception of FIG. 1. FIGS. 6, 7, and 8 are plan views of the information card showing the implementation example of FIG. Card configuration block diagram, Figure 1O (1), (2) and Figure 11 (1)
, (2) are a plan view and a vertical sectional view of an information card showing the implementation example of FIG. 9. 10... External device, 11.27... Transmitting circuit, 12.26... Receiving circuit 43.25.
...Switch circuit, 14.22...Transmission medium, 20...Information card, 21...
・Card body, 23...IC224...
・Power supply circuit, 28・Old...Memory control circuit, 29...
...Memory, 14A, 22A...Magnetic coupling coil, 14'B1, 14B2.22B1.22B2
・Old...Pole plate. Applicant's representative: Takashi Kakinoki Structure of success report card Prolag series 2 Figure 2 Practical diagram of Figure 2 Figure 3 Other implementation example of Figure 9 Figure 11

Claims (5)

[Claims] 1. a transmission medium that supplies power from the outside and exchanges signals with the outside without contact; a power supply circuit that has a power storage function and converts the power that is input through the transmission medium into DC power; a switch circuit that is connected to a transmission medium and switches a signal path based on a switching signal; a receiver circuit that receives an external signal input through the switch circuit; a memory that stores information; and a memory that stores information based on the output of the receiver circuit. A memory control circuit that controls the operation of the memory and outputs an output signal and the switching signal at a predetermined timing, and a transmitting circuit that sends the output signal of the memory control circuit to the transmission medium through the switch circuit, are arranged in a substantially rectangular shape. An information card using a non-contact alternate transmission and reception method, characterized by being housed within a shaped card body. 2. 2. The contactless alternate transmission/reception type information card according to claim 1, wherein said transmission medium is constituted by a magnetic coupling coil, and said power supply circuit is constituted by a rectifier charging circuit and a secondary battery. 3. 2. The contactless alternate transmission/reception type information card according to claim 1, wherein said transmission medium is constituted by a pair of capacitive coupling electrode plates, and said power supply circuit is constituted by a rectifier charging circuit and a secondary battery. 4. 3. The information card according to claim 2, wherein the magnetic coupling coils are arranged symmetrically with respect to the center line of each side of the card body. 5. 4. The information card according to claim 3, wherein the pair of capacitive coupling electrode plates are arranged symmetrically with respect to the center line of each side of the card body.