JPH0620628Y2 - Transmission medium symmetrically arranged information card - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is applied to office automation (off-ice Autom
ation, OA), factory automation (Factory
Information cards such as IC cards used in the field of automation, FA, etc., especially non-power source (without built-in battery) and non-contact type transmission medium symmetrical arrangement type that does not have contact terminals for power supply and signal input / output It concerns information cards.

(Prior Art) In a general information card, an integrated circuit such as a semiconductor memory is built in a card body made of plastic or the like, and a contact terminal with an external device is provided on the card surface.

Conventionally, as a technology in such a field, Nikkei Mechanical (1985-10-21) Nikkei McGraw-Hill "IC card" P.167-
170, Nikkei Electronics, (1985-15-2) Nikkei McGraw-Hill, Inc. "Electronics manufacturer into the IC card market (above)" P.275-292, Nikkei Electronics, (1985-12-6) Nikkei McGraw-Hill, Inc. "IC card An electronics manufacturer (below), which slumps into the market ”P.249-26
2. Some were described in Japanese Utility Model Publication No. 56-109166. The configuration will be described below with reference to the drawings.

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

In FIG. 2, 1 is an external device for reading and writing information, 2 is an information card, and DC power Vc, E is supplied from the external device 1 to the information card 2 and the external device 1 Input / output signal I / 01 between the information cards 2
I / 0n is given and received. 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 sources and signals exposed on its surface. The contact type terminal 4 is provided, and an electronic integrated circuit (hereinafter referred to as IC) 5 is provided inside. IC5 is semiconductor memory 6,
It has a microprocessor 7 which 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 terminal 4 on the card 2 side comes into contact with the terminal on the external device 1 side, and the information stored in the memory 6 is passed through these terminals 4 and the like to the external device 1. 1 or read the information on the external device 1 side into the memory 6.

(Problems to be solved by the invention) However, in the information card having the above configuration, since the terminal 4 is exposed to the outside, contact failure due to dirt, oxidation, corrosion, wear, etc. of the terminal contact portion, and leakage current. There was a problem in reliability due to malfunction due to the above, and further damage to the IC 5 due to static electricity and external voltage.

In order to eliminate this problem, a battery, an oscillator, a loop antenna, etc. are built in the card body 3 without exposing the terminal 4 to the surface of the card body 3, and a non-contact type that sends out a signal from the loop antenna using the battery. Although an information card has been proposed, there is a problem in that the card body 3 becomes thick due to the attachment of the battery and the battery is replaced.

In addition, the direction in which the information card 2 is inserted into the external device 1 is limited to a certain direction because the terminal 4 on the card 2 side and the terminal on the external device 1 side need to be in contact with each other. When it was inserted, it had to be inserted again from the correct direction, which was disadvantageous in use.

In order to solve these problems, JP-A-60-21158
No. 2 and Japanese Patent Laid-Open No. 61-101886,
A contactless information card has also been proposed which uses a coupling coil to receive power from a power source and exchange signals. However,
It is not easy to multiplex / separate transmitted / received signals, the circuit configuration becomes complicated, or the received signal and the transmitted signal are signals of the same system, so signal transmission errors occur due to mutual interference between the two signals. There is.

The present invention has the problems that the above-mentioned conventional techniques have, because it is not easy to multiplex / separate the transmission / reception signals, the transmission / reception circuit configuration becomes complicated, and the reliability due to the influence of static electricity, signal transmission error, etc. It is intended to provide an information card that solves a problem and a restriction on the insertion direction.

(Means for Solving Problems) In order to solve the above problems, the present invention is housed in a card body having a substantially rectangular shape and does not receive power from the outside or exchange signals with the outside. Equipped with a contact transmission medium,
In an information card that reads internal information through the transmission medium and writes external information inside, the transmission medium is configured as follows.

That is, the transmission medium includes a power receiving / receiving means configured by either a magnetic coupling coil or a capacitive coupling electrode plate that commonly or independently receives power and receives signals, and the magnetic coupling for performing signal transmission. A magnetic coupling coil and a capacitive coupling polar plate, and the magnetic coupling coil and the capacitive coupling polar plate are arranged symmetrically with respect to the center line of each side of the card body. .

(Operation) According to the present invention, since the information card is configured as described above, the power receiving / receiving means receives the power source power and receives the signal in a non-contact manner. The internal signal is transmitted by contact. At this time, the arrangement structure of the magnetic coupling coil and the capacitive coupling polar plate has a function of accurately transmitting the power source power and the signal in any insertion direction. Therefore, the above problems can be eliminated.

(Embodiment) FIG. 1 is a block diagram showing a configuration of a transmission medium symmetrical arrangement type information card of a magnetic coupling power feeding / magnetic coupling receiving / capacitive coupling transmitting system showing an embodiment of the present invention.

In FIG. 1, 10 is an external device, and the external device 10
An information card 20 is inserted in the.

The external device 10 has an oscillation circuit 11 that outputs AC power, a transmission circuit 12 that converts the input signal Si into a transmission signal, and a reception circuit 13 that converts the transmission signal into an output signal So. Further, the transmission circuit 12 has respective magnetic coupling coils 14 and 15 which are power receiving / receiving means, and the reception circuit 13 has one of the pair of capacitive coupling polar plates 16 and 17 which is a transmitting means.
Are connected to each other. The other plate 17 is grounded to form a return loop.

Further, the information card 20 has a substantially rectangular card body 21 made of plastic or the like, and in the card body 21, a pair of magnetic couplings facing the magnetic coupling coils 14 and 15 of the external device 10 side. The coils 22 and 23 and a pair of capacitive coupling polar plates 24 and 25 facing the polar plates 16 and 17 are provided, and the IC 26 is housed therein. In IC26, each magnetic coupling coil 22,23
Power circuit 27, receiver circuit 28, and electrode plate 24 connected to
There are provided a transmission circuit 29 connected to, a memory control circuit 30 and a memory 31 connected to the reception circuit 28 and the transmission circuit 29. The electrode plate 25 is grounded to form a return loop.

The power supply circuit 27 is a circuit for converting the AC power input through the magnetic coupling coils 14 and 22 into a stabilized DC voltage Vdc, and the receiving circuit 28 is the original signal based on the transmission signal input through the magnetic coupling coils 15 and 23. The transmitting circuit 29 is a circuit for converting the output signal of the memory control circuit 30 into a signal for transmission and sending it to the electrode plates 24, 25, 16, 17. The memory control circuit 30 is composed of, for example, a microprocessor, and is a circuit that controls reading and writing of the memory 31, and performs serial-parallel conversion of data. The memory 31 is a medium for storing various information, and includes a read-only memory (ROM), a writable ROM (PROM), and an electrically erasable and writable ROM (EEPRO).
M), an ultraviolet erasable and writable ROM (EPROM), and the like.

The input signal Si in the external device 10 is the information card 20.
An initial set (initial setting) of the memory control circuit 30 on the side, control signals for reading and writing information, and signals to be written in the memory 31 are serialized. Further, the output signal So is obtained by serializing the read information of the memory 31 and the operation confirmation signal inside the information card in the memory control circuit 30.

FIG. 4 is a plan view showing a mounting example of the information card 20 in FIG. In this information card 20, circular magnetic coupling coils 22 and 23 are concentrically arranged with the intersection of a center line X in the long side direction and a center line Y in the short side direction of the card body 21 as the center point. On the center line X located on the outer circumference of the magnetic coupling coils 22 and 23, rectangular pole plates 24 and 25 having the same shape are symmetrically arranged. These magnetic coupling coils 22,23
Also, the magnetic coupling coils 14 and 15 and the pole plates 16 and 17 on the side of the external device 10 corresponding to the pole plates 24 and 25 are similarly arranged.

FIG. 5 is a plan view showing another embodiment of the information card 20 in FIG. In this information card 20, unlike FIG. 4, rectangular pole plates 24 and 25 having the same shape are symmetrically arranged on the center line Y. Corresponding to this, the electrode plate on the external device 10 side
16 and 17 are arranged in the same way.

Next, the operation will be described.

When the information card 20 is inserted into the external device 10, the AC power output from the oscillation circuit 11 in the external device 10 is supplied to the information card 20 side through the magnetic coupling coils 14 and 22, and the input signal Si is transmitted by the transmission circuit 12. The signal is converted into a transmission signal and transmitted to the information card 20 side through the magnetic coupling coils 15 and 23.

The AC power supplied to the magnetic coupling coil 22 on the information card 20 side is converted into a DC voltage Vdc stabilized by a power supply circuit 27, and then supplied to each circuit in the IC 26 as a power supply.
Furthermore, the transmission signal input to the magnetic coupling coil 23 is
The signal is converted into the original signal Si by the receiving circuit 28 and the memory control circuit
Given to 30. The memory control circuit 30 receives the input signal Si
After writing the information in the memory 31 by designating an address based on the information contained in, for example, the write information, the write completion signal is output. This signal is converted into a transmission signal by the transmission circuit 29, and then transmitted to the external device 1 through the plates 24, 25, 16 and 17.
It is transmitted to the receiving circuit 13 on the 0 side.

The receiving circuit 13 converts the given transmission signal into the original signal So and outputs the signal So.

Here, the magnetic coupling coils 22 and 23 and the electrode plates 24 and 25 on the information card 20 side are arranged symmetrically with the magnetic coupling coils 14 and 15 and the electrode plates 16 and 17 on the external device 10 side, respectively. , The magnetic coupling coils 22 and 23, no matter which direction the information card 20 is inserted, that is, the top, bottom, left, and right sides are inserted into the external device 10.
Since the combined state of the electrodes 14, 15 and the electrode plates 24, 25 and 16, 17 is constant, the above operation is always possible.

FIG. 6 shows another embodiment of the present invention, which is a magnetic coupling power supply receiver.
It is a block diagram of the information card of a capacity coupling transmission system.

In this circuit, the magnetic coupling coils 14 and 22 shown in FIG. 1 are omitted, and the magnetic coupling coils 15 and 23 share power transmission and signal transmission. Further, the transmission circuit 12 has a circuit configuration that modulates AC power with the input signal Si and transmits it to the information card 20 side through the magnetic coupling coils 15 and 23, and the reception circuit 28 on the information card 20 side is magnetic. The circuit configuration is such that only the signal component of the transmission signal input from the coupling coil 23 is extracted and converted into the original signal Si. In this way, even if the magnetic coupling coils 14 and 22 are omitted, the same operation as the circuit of FIG. 1 can be performed.

7 and 8 are plan views showing mounting examples of the information card 20 of FIG. In the information card 20 of FIG. 7, a circular magnetic coupling coil 23 is arranged centering on the intersection of the center lines X and Y, and rectangular pole plates 24 and 25 of the same shape are arranged on the center line X on the outer periphery thereof. They are arranged symmetrically. Also, the eighth
In the illustrated information card 20, a magnetic coupling coil 23 having a substantially rectangular shape is arranged with the intersection as a center point, and rectangular pole plates 24 and 25 having the same shape are arranged on the center line Y on the outer periphery thereof. . Corresponding to the magnetic coupling coil 23 and the pole plates 24 and 25 of FIGS. 7 and 8, the magnetic coupling coil 1 on the side of the external device 10
5 and electrode plates 16 and 17 are also arranged. Therefore, the same operation is possible no matter which direction the information card 20 is inserted.

FIG. 9 is a block diagram of an information card of the capacitive coupling power supply reception / magnetic coupling transmission system showing still another embodiment of the present invention, and FIGS. 10 and 11 are perspective views showing an example of mounting the information card. .

The circuit of FIG. 9 replaces the magnetic coupling coils 15 and 23 for power supply and reception of FIG. 6 with the plates 16, 17, 24 and 25, and the transmission plates 16, 17, 24 and 25 are magnetic. This is a structure in which the coupling coils 15 and 23 are replaced, and operates almost in the same manner as in FIG.

Further, in the mounting examples of FIGS. 10 and 11, the shape of the electrode plates 24, 25 is made larger than that of FIGS. 7 and 8 to improve the power receiving efficiency.

The above embodiments have the following advantages.

Unlike the conventional method, the terminals of the internal circuit are not exposed to the outside and power can be received and signals can be input / output without contact.
There is no influence of poor contact due to wear. Furthermore, not only is there no failure or malfunction due to leakage current, but there is no need to protect the internal circuit due to external voltage or static electricity. Therefore, high reliability can be obtained.

The completely sealed structure improves explosion-proof and waterproof properties. Therefore, it can be applied not only to ordinary OA equipment and FA equipment, but also to equipment in a bad environment or a place where explosion-proof measures are required.

Since it does not have a built-in battery, there is no need to replace the battery,
Further, the card body 21 can be thinned by the space for installing the battery. Further, it can be expected to have a longer life as compared with a conventional solar cell having a built-in solar cell.

Since the magnetic coupling structures 22 and 23 and the electrode plates 24 and 25 on the information card 20 side are symmetrically arranged with respect to the center lines X and Y of the card body 21, which direction the information card 20 is, that is, up and down,
The operation can be performed by inserting the external device 10 with the right and left sides reversed. In this way, since the insertion direction of the information card 20 is not restricted, usability is improved.

Since the received signal and the transmitted signal are transmitted by different signal systems, the two signals are separated and mutual interference does not occur. Therefore, there is no signal transmission error.

Magnetic coupling coils 14, 15, 22, 23 and capacitive coupling plates 16, 1
Since power supply power and signal transmission / reception are performed using 7, 24 and 25, signal multiplexing / demultiplexing is easy and the transmission / reception circuit configuration is simple.

The magnetic coupling coils 16, 17, 24, 25 can suppress the generation of static electricity and improve the mechanical strength against bending.

The present invention is not limited to the illustrated embodiment, and various modifications can be made. For example, the magnetic coupling coils 22 and 23 and the pole plate 2
Change the shape and arrangement of 4,25 to something other than the one shown,
It is also possible to transform the circuit configuration in the IC27 into another one such as a hybrid system.

(Effect of the Invention) As described in detail above, according to the present invention, since the reception signal and the transmission signal are transmitted by different signal systems, these two signals are separated from each other and mutual interference does not occur.
Therefore, there is no signal transmission error. In addition, since the power supply power and the signal transmission / reception are performed by using the magnetic coupling coil and the capacitive coupling polar plate, it is easy to multiplex / separate the signal and the transmission / reception circuit configuration becomes simple. Furthermore, the capacitive coupling electrode plate can suppress the generation of static electricity and improve the mechanical strength against bending of the card. Moreover, since the magnetic coupling coil and the capacitive coupling polar plate forming the transmission medium are symmetrically arranged with respect to the center line of each side of the card body, there is no restriction in the insertion direction of the information card, and the usability is improved. improves.

[Brief description of drawings]

FIG. 1 is a block diagram of a magnetically coupled power feeding / magnetically coupled reception / capacitively coupled transmission system symmetrically arranged information card showing an embodiment of the present invention. FIG. 2 is a block diagram of a conventional information card. 3 is a perspective view showing the mounting example of FIG. 2, FIG. 4 is a plan view showing the mounting example of FIG. 1, FIG. 5 is a plan view showing another mounting example of FIG. 1, and FIG. Another embodiment of the present invention is a block diagram showing the configuration of an information card of the magnetically coupled feeding / capacitively coupled transmitting system, FIG. 7 is a plan view showing the mounting example of FIG. 6, FIG. 8 is another of FIG. 9 is a plan view showing a mounting example of FIG.
FIG. 1 is a block diagram showing the configuration of an information card of a capacitively coupled power supply receiving / magnetically coupling transmitting system showing a further embodiment of the present invention.
10 is a plan view showing the mounting example of FIG. 9, and FIG. 11 is a plan view showing another mounting example of FIG. 10 …… External device, 11 …… Oscillation circuit, 12,29 …… Transmission circuit, 13,28 …… Reception circuit, 14,15,22,23, …… Magnetic coupling coil, 16,17,24,25… … Pole plate, 20… Information card, 21…
… Card body, 26 …… IC, 27 …… Power supply circuit, 28 …… Reception circuit, 29 …… Transmission circuit, 30 …… Memory control circuit, 31 ……
memory.

Claims (3)

[Scope of utility model registration request] 1. A transmission medium which is housed in a card body having a substantially rectangular shape and which receives electric power from the outside and exchanges signals with the outside in a non-contact manner, and reads internal information through the transmission medium. In an information card for writing external information to the inside, the transmission medium comprises a magnetic coupling coil or a capacitive coupling electrode plate for commonly or independently receiving electric power and signal reception. A receiving means and a transmitting means configured by either the magnetic coupling coil or the capacitive coupling electrode plate for performing signal transmission, wherein the magnetic coupling coil and the capacitive coupling electrode plate are provided on the card main body. A symmetrically arranged transmission medium information card characterized by being symmetrically arranged on the center line of each side. 2. The magnetic coupling coil is composed of a pair of coils arranged concentrically at the intersections of the center lines of the respective sides of the card body, and the capacitive coupling polar plate defines the intersections of the center lines. The transmission medium symmetrically arranged information card according to claim 1, wherein the utility model registration is constituted by a pair of polar plates symmetrically arranged on the center line as a reference. 3. The magnetic coupling coil is composed of one coil arranged in the center of the card body, and the capacitive coupling electrode plate is centered around the one coil and at the outer periphery thereof, and The transmission medium symmetrical arrangement type information card according to claim 1, wherein the utility model registration comprises a pair of polar plates symmetrically arranged on the center line.