JP2001319192A - Card reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a card reader which transmits and receives data to from a nonconta IC card and also supplies electric power to the IC card with use of feeble radio waves without needing radio license so that communication is attained between the card reader and the IC card. SOLUTION: This card reader 10 is provided at least with an antenna part 1 for performing the communication of data and supply of electric power to a contactless IC card 20, and the antenna part 1 consists of a magnetic member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card reader capable of reading data from an IC card at least in a non-contact manner, and more particularly to a card reader which is used in a non-contact IC card communication system and does not require a wireless license. The present invention relates to a card reader capable of performing communication by radio waves.

[0002]

2. Description of the Related Art Conventionally, data has been communicated between a card reader and a non-contact IC card using electromagnetic induction.
2. Description of the Related Art A non-contact IC card communication system that supplies power from a card reader to a non-contact IC card is known.

[0003] The carrier frequency used for communication between the card reader and the non-contact IC card and for power supply is determined by standards, and the electric field radiated from the antenna of the card reader also complies with the regulation values of the Radio Law. There is a need to.

[0004] In order to comply with the regulation value of the Radio Law, specifically, it is necessary that the radiated electric field from the antenna satisfy 500 µV / m or less at a distance of 3 m. If the value falls outside this regulation, a wireless license is required.

By the way, regarding only the radiated electric field,
It is not difficult to satisfy 500 μV / m or less at a distance of 3 m, that is, it can be satisfied simply by weakening the electric field strength. However, weakening the electric field strength from the antenna is nothing less than weakening the magnetic field strength emitted at the same time. If the strength of the magnetic field is weakened, there is a problem that it becomes difficult to supply power to the non-contact IC card by electromagnetic induction.

An invention for weakening the electric field strength at a distant place for the purpose of complying with the regulations of the Radio Law is disclosed in Japanese Patent Application Laid-Open No.
No. 88036 discloses this. According to the present invention, by forming a conductor member that forms a mirror image of an antenna on a spiral or coil antenna that generates an electromagnetic field for supplying electric power to an IC card, the regulation value of the Radio Law is established. And supplies electric power capable of stably operating the IC card to be approached.

[0007]

As described above, in the conventional card reader, the electric field intensity output from the antenna of the card reader is changed to a radio wave in order to enable communication with a weak radio wave that does not require a wireless license. Satisfies the regulation value by the law (500 μV / m or less at a distance of 3 m), and
There is a problem that it is difficult to transmit and receive data and supply power to the contactless IC card. That is, there is a problem that it is difficult to transmit and receive and supply power, and it is difficult to make the electric field strength at a distant place less than a value regulated by the Radio Law.

Further, when a conductor member that forms a mirror image of an antenna is formed on a spiral or coil antenna that generates an electromagnetic field for supplying power to an IC card, the mechanism is not clear. However, since the magnetic field and electric field of a mirror image formed by the antenna and the conductive member are combined and the electromagnetic field strength at a distant place is suppressed, it is necessary to accurately set the positional relationship between the antenna and the conductive member. However, there is also a problem that there are many restrictions on design since it is necessary to consider the influence of electronic components and the like set near the antenna. Since the antenna and the conductive member form a mirror image, a distance between the antenna and the conductive member is essential. Therefore, a space is required to incorporate the antenna and the conductive member. Therefore, since the antenna and the component of the conductive member are arranged with a space therebetween, measures against vibration are indispensable. Fluctuations in the distance between the two parts due to vibration affect the mirror image, resulting in fluctuations in the electromagnetic field strength. Even when the cushioning material is inserted between the two parts, there is a problem that the influence of the electromagnetic field must be considered.

The present invention relates to a non-contact IC card which transmits and receives data and supplies power to the non-contact IC card by using a weak radio wave that does not require a wireless license, thereby enabling communication between the non-contact IC card and the card reader. The purpose is to provide a card reader.

[0010]

In order to solve the above-mentioned problems, a card reader according to the present invention is a card reader having at least an antenna section for performing data communication and power supply to a card, wherein the antenna section is provided. And a magnetic member.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION
A card reader having an antenna unit for performing at least data communication and power supply to a card, wherein the card reader is provided with a magnetic member in the antenna unit, and suppresses electric field strength at a distant place. Power can be supplied to the card, and good data communication can be performed.

According to a second aspect of the present invention, in the first aspect, the carrier frequency output from the antenna unit is:
A card reader characterized in that the resonance frequency of the antenna of the antenna section is different, and the simple configuration of shifting the resonance frequency from the carrier frequency makes it possible to extremely easily suppress the electric field strength at a distant place. .

According to a third aspect of the present invention, there is provided a card reader according to the first or second aspect, wherein the antenna of the antenna section is a loop antenna, and the antenna can be thin and lightweight, and the number of turns can be reduced. The inductance can be easily determined by the shape, and the resonance frequency can be easily changed only by adjusting the capacitor of the resonance circuit to be connected.

According to a fourth aspect of the present invention, there is provided a card reader according to any one of the first to third aspects, wherein the magnetic member is ferrite. The card reader has good magnetism and can be easily mounted on the antenna. is there.

According to a fifth aspect of the present invention, there is provided a card reader according to any one of the first to fourth aspects, wherein an electric field intensity output from the antenna section is 500 μV / m or less at a distance of 3 m from the antenna section. Yes, it can satisfy the regulation value of the Radio Law.

According to a sixth aspect of the present invention, there is provided a card reader having at least an antenna unit for performing data communication and power supply to the card, wherein the magnetic member is provided on a surface of the antenna unit which is different from the direction of communication with the card. It is a card reader characterized by having, in the communication direction with the card, it is possible to suppress the electric field strength at a distant place, supply power to the card, and perform good data communication it can.

According to a seventh aspect of the present invention, there is provided a card reader according to any one of the first to sixth aspects, further comprising a card slot for inserting a card, wherein a user of the card inserts the card into the card slot. Alternatively, it can be left stationary, and communication with the card can be easily performed.

According to an eighth aspect of the present invention, in the seventh aspect, the antenna section and the control board section for controlling the antenna section face each other, and a card slot section is provided between the antenna section and the control board section. The card reader is characterized in that the card reader can be made compact, and interference of the control board with the antenna can be avoided.

Hereinafter, embodiments of the present invention will be described.

(Embodiment 1) FIG. 1 is an external perspective perspective view showing a card reader according to Embodiment 1 of the present invention.

In FIG. 1, 10 is a card reader, 1 is an antenna section, 2 is a control circuit board section, 3 is a power supply board section, and 4 is a card proximity section. Reference numeral 20 denotes a card.

As shown in FIG. 1, the card reader 10
An antenna unit 1 for transmitting / receiving data (at least data can be read) to / from the card 20 and supplying power to the housing, control of data transmission / reception to / from the card 20 via the antenna unit 1, control of the antenna unit 1, A control circuit board unit 2 controls data transmission and reception with an externally connected device such as a host computer, and a power supply board unit 3 that supplies power to each component of the card reader 10. Although not shown, the antenna unit 1, the control circuit board unit 2, and the power supply board unit 3 are electrically connected.

Then, by bringing the card 20 closer to the card proximity unit 4, data transmission / reception and power supply are performed.

It is preferable that the material of the housing of the card reader 10 be made of a material having no magnetic shielding effect or a material which is not charged. That is, as described later, when exchanging signals with the card 20 by electromagnetic induction, if the main body case is made of a material having a magnetic shielding effect or a charged material, signals may not be exchanged well. is there. However, when the intensity of the magnetic field to be generated is strong, a constituent material is selected in consideration of workability, cost, or strength, and the constituent material may have a certain magnetic shielding effect and a certain charge. . As a constituent material of the main body case, for example, plastic, synthetic resin, or the like is particularly preferably used in terms of workability and cost, and resins such as acryl, vinyl chloride, and epoxy resin are used as specific materials.

Next, the antenna section of the card reader of the present invention will be described.

FIG. 2 is a perspective view showing the configuration of the antenna section of the card reader according to Embodiment 1 of the present invention.

In FIG. 2, 1a is a loop antenna, 1
b is a magnetic member.

The antenna unit 1 outputs a radio wave for supplying data and power necessary for communicating with the card 20. Since the antenna unit 1 has the magnetic member 1b attached to the front surface of the back surface of the loop antenna 1a, the radio wave output to the back side of the loop antenna 1a is absorbed by the magnetic member 1b and the radio wave output to the outside of the card. Is only in the front direction of the loop antenna 1a, and the card 20
, The communication in the proximity becomes possible. This is the direction in which the antenna unit 1 passes through the card proximity unit 4 in FIG.

FIG. 3 is a graph showing the relationship between the electric field strength output from the loop antenna of the card reader and the resonance frequency.

In FIG. 3, the vertical axis represents the electric field strength (dBμV).
/ M), and the horizontal axis is the resonance frequency (MH) of the loop antenna 1a.
z). The carrier frequency is 1 if it complies with the standard.
Provided at 3.56 MHz.

As shown in FIG. 3, when the resonance frequency of the loop antenna 1a matches the carrier frequency, the electric field intensity output from the loop antenna 1a becomes maximum. In this case, it is possible to supply data and power to the non-contact IC card most efficiently.
m exceeds 500 μV / m (= 54 dBμV / m or less). Therefore, by shifting the resonance frequency of the loop antenna 1a from the carrier frequency of the radio wave output from the loop antenna 1a, it is possible to make the electric field strength satisfy the regulation value of the Radio Law. That is,
500 μV / m at a distance of 3 m, which is the regulation value of the Radio Law
(= 54 dBμV / m) is realized by shifting the resonance frequency from the carrier frequency standard value of 13.56 MHz so as to satisfy the electric field strength of (= 54 dBμV / m) or less.

Here, the resonance frequency of the loop antenna 1a is given by the following equation.

[0033]

(Equation 1)

In equation (1), fr is the resonance frequency, L
Is an inductance and C is a capacitance. L is determined by the number of turns and the shape of the coil of the loop antenna 1a, and C is given by an adjusting capacitor of a resonance circuit constituting the loop antenna 1a. Therefore, if the number of turns and the shape of the coil are determined, L becomes constant, so that the resonance frequency f
r is variable by C.

Therefore, in order to shift the resonance frequency of the loop antenna 1a from the carrier frequency of the radio wave output from the loop antenna 1a, that is, to make them different from each other, an adjusting capacitor of a circuit constituting the loop antenna 1a is required. , And by changing the capacity.

As an antenna constituting such an antenna unit 1, a bar antenna or the like can be used other than the loop antenna. In particular, the output of the loop antenna is easy to adjust, and by changing the number of turns and shape of the coil,
In addition to being able to cope with various specifications, also in manufacturing, the reproducibility of characteristics is high and the cost is low, which is preferable.

On the other hand, by shifting the resonance frequency from the carrier wave frequency, it is possible to satisfy the regulation value of the Radio Law, but this results in lowering not only the electric field strength but also the magnetic field strength. The decrease in the magnetic field strength causes a problem that the power supply to the card 20 cannot be performed efficiently.
As described above, since the magnetic member 1b is attached to the back surface of the loop antenna 1a, power can be efficiently supplied to the card 20.

The magnetic material constituting the magnetic member mounted on the back surface of the antenna includes Mn-Zn, Ni-Z
Conventionally known magnetic materials such as various ferrites represented by n and Mg-Zn ferrites can be used. In particular, ferrite has stable properties as a magnetic material,
Low cost and preferred.

FIG. 4 is a perspective plan view showing a card used in the card reader according to the first embodiment of the present invention. The card 20 is a so-called non-contact type IC card. As shown in FIG. 4, the structure of the card 20 is such that a loop-shaped coil is formed in a base material 21 made of a resin material such as vinyl chloride or polyethylene terephthalate. And an integrated circuit 23 connected to the antenna unit 22 is embedded. When an external magnetic field generated from the card reader enters the loop coil serving as the antenna unit 22, an induced current flows through the loop coil serving as the antenna unit 22 by the external magnetic field, and the induced current causes a data transfer in the memory of the integrated circuit 23 to occur. In addition to performing conversion, rewriting, or erasing, the induced current can serve as a power source for the integrated circuit 23. The transmission and reception of data with the card reader is performed via the antenna unit 22.

FIG. 5 is a block diagram showing a communication state between the card reader and the card according to the first embodiment of the present invention. 5 is a CPU, 6 is an RF module, 7 is a clock generator, 8 is a modulator, 9 is a demodulator, 11 is a filter circuit,
Reference numeral 12 denotes an adjusting capacitor.

As shown in FIG. 5, the antenna unit 1 of the card reader 10 outputs radio waves for supplying data and power necessary for communication, and communication with the card 20 is performed.

Here, the loop antenna 1a and the adjusting capacitor 12 are mounted on the antenna unit 1, and the RF module 6, the filter circuit 11, and the CPU 5 are mounted on the control board unit. 3 is supplied with power.

Next, the operation of each section in FIG. 5 will be described.

The CPU 5 controls the card reader.

The RF module 6 is a block composed of a clock generator 7, a modulator 8, a demodulator 9 and the like necessary for communication. The clock generator 7 generates 13.56 MHz, which is the frequency of a carrier used during communication. The modulator 8 modulates data to be transmitted. The demodulation unit 9 demodulates the received signal and extracts data.

The filter circuit 11 is configured to perform transmission and reception efficiently.

The loop antenna 1a is a part for transmitting and receiving radio waves necessary for performing communication with the card 20. The adjustment capacitor 12 adjusts the resonance frequency of the loop antenna 1a.

The card 20 includes an antenna section 22 and an integrated circuit 23. The antenna unit 22 is configured to efficiently receive power supply and data from radio waves from a card reader. The integrated circuit 23 controls reading and writing of data based on data transmitted from the card reader.

Next, the operation will be described.

Even when the card 20 is not in the communicable range, the card reader transmits an interrogation radio wave through the loop antenna 1a. If the card 20 is within the communicable range, the card 20 responds to the card reader. This response allows the card reader to read and write data on the card 20 side. When reading data stored in the card, the CPU 5
Issues a command, and transmits the command and data through the modulation unit 8, the filter circuit 11, and the loop antenna 1a to transmit a modulated radio wave. The card 20 receives the electric wave by the antenna unit 22 and receives power and data. Processing is performed in the integrated circuit 23, and the stored data is transmitted to the card reader side. The card reader receives the transmission radio wave through the loop antenna 1a, restores the data by the demodulation unit 9, and reads the data. The same operation is performed for writing data.

The card reader according to the first embodiment may be provided with a display means and a voice generating means as in a second embodiment described later, and may further include a printer for printing the contents of communication with the card. May be provided. Also,
These display means and printing means may be externally connected devices and connected to a card reader.

(Embodiment 2) FIGS. 6, 7, and 8 are an external perspective perspective view, an external perspective view, and a transparent side view showing a card reader according to Embodiment 2 of the present invention, respectively.

6 to 8, 10 is a card reader, 1 is an antenna section, 2 is a control circuit board section, 3 is a power supply board section, 13 is a card slot section, 14 is a marking section, and 15 is a marking section. A display means, 16 is a sound generating means, 17 is a cable escape groove, and 17 is a cable.
Reference numeral 20 denotes a card. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted here.

As shown in FIG. 6, the card reader 10
An antenna unit 1 for transmitting / receiving data to / from the card 20 and supplying power to the card, and a card 2 via the antenna unit 1 in the housing.
0, control of the antenna unit 1, control of data transmission / reception to / from an externally connected device such as a host computer, control of a display command to the display unit 15, control of a voice generation command to the voice generation unit 16, and the like. A control circuit board unit 2, a power supply board unit 3 for supplying power to each component of the card reader 10, a display unit 15 for displaying a communication state with the card 20,
It has a sound generating means 16 for notifying the communication state with the card 20 and the like. Also, an antenna unit 1 and a control circuit board unit 2
And a card slot portion 13 is provided at a position sandwiched between the two.

As described above, by making the antenna unit 1 and the control circuit board unit 2 perpendicular to the horizontal surface on the desk and making them upright, the depth of the device can be reduced, and the card reader can be reduced. 10 can be made compact.

Although not shown, the antenna unit 1
And the control circuit board 2 and the power supply board 3 are electrically connected.

Further, the configuration of the antenna section 1 is the same as that described in the first embodiment, and includes a loop antenna 1a and a magnetic member 1b. It is possible to satisfy the regulation value of the Radio Law, and it is possible to efficiently supply power to the card 20. Since the antenna unit 1 has the magnetic member 1b attached to the front surface of the back surface of the loop antenna 1a, the radio wave output to the back side of the loop antenna 1a is absorbed by the magnetic member 1b and the radio wave output to the outside of the card. Is only in the front direction of the loop antenna 1a, and by bringing the card 20 close to that direction, close communication is possible. This is shown in FIGS.
Through the card slot 13 and the control circuit board 2
And communication within the card slot unit 13 is enabled.

A card 20 is arranged in the card slot section 13 for data transmission / reception and power supply. By providing this card slot section 13,
The user of the card 20 can insert the wallet in the wallet and leave the card 20 in the wallet.

Further, as shown in FIG. 7, the card slot section 13 is provided with a marking section 14. In the marking section 14, "Place the card here."
Information such as "Please let the card pass." And "Card reading unit" are printed or printed, and clarify the existence and position of the card slot 13 as the insertion position of the card 20. The marking section 14 may be printed or printed directly on the housing of the card reader 10, and a label or the like on which information is printed or printed may be printed.
May be affixed to. With these configurations, the user can easily insert or approach the card 20.

The display means 15 is provided for the card reader 10.
This is for visually confirming the communication state between the device and the card 20. The display means 15 includes at least one LE
D can be used. For example, green LED and red L
By using the ED, the green LED blinks while the communication between the card 20 and the antenna unit 1 is continued,
Green LE when communication between the antenna unit 1 is completed successfully
When D lights up and communication between the card 20 and the antenna unit 1 causes an error, the user turns off the antenna unit 1 of the card 20 and the card reader 10 by turning off the green LED and turning on the red LED. The completion of communication between them and the communication error can be easily visually recognized.

The voice generating means 16 is for audibly confirming the communication state between the wireless communication means and the card. At least one buzzer can be used as the sound generator 16. When the communication between the card 20 and the antenna unit 1 is completed successfully, the buzzer does not sound, and when the communication between the card 20 and the antenna unit 1 causes an error, the user sounds the buzzer. Completion of communication between the antenna 20 and the antenna unit 1 of the card reader 10 and a communication error can be easily and audibly recognized.

Further, as shown in FIG.
To 0, a cable 18 such as a communication cable or a power cable connected to the control circuit board section 2 or the power board section 3 is connected. A cable escape groove 17 for routing the connected cable 18 is provided.
The provision of the cable escape groove 17 facilitates the routing of the cable 18 and improves the usability.

The display means 15 is not limited to the LED, but may be a liquid crystal display, an organic / inorganic EL display, a plasma display, a CRT display, or the like. When such a display is used, the user's name, ID number, current time, purchased product name,
The current number of points and the like are displayed.

Then, the card reader 10 may be provided with a keyboard for inputting predetermined data. From the keyboard, for example, data such as the management number of the product used, the management number of the user, the date, and the purchase price are input. The data input device is not limited to a keyboard, but may be a PDA or a touch panel for handwriting input or a voice input device.

The operation of the card reader 10 according to the second embodiment of the present invention will be described. Here, FIG. 9 is a block diagram showing a card reader according to Embodiment 2 of the present invention.

First, the IC memory read / write control unit 30
An electric current is caused to flow through the antenna unit 1 to generate a magnetic field, and the magnetic field generated from the antenna unit 1 by the antenna unit 22 provided in the card 20 inserted into the card slot unit 13 or brought into close or contact with the card unit 13 Receiving the integrated circuit 23
Erasing and updating data stored in the internal memory, and sometimes transmits information from the integrated circuit 23 to the antenna unit 1 through the antenna unit 22, and transmits the information to the CPU 5 provided on the control circuit board unit 2. To transfer predetermined information or data. At this time, the CPU 5 transfers the read data and the like to the host computer 40, and
Then, an operation such as totalizing the read data is performed.
When writing data from the host computer 40 to the integrated circuit 23 of the card 20, the CPU 5 sends a signal corresponding to the data to the IC memory read / write control unit 30.
To generate a predetermined magnetic field in the antenna unit 1 and write data to the integrated circuit 23 in the card 20.

The transmission and reception of signals are performed as described above.
Completion of at least one operation of recording data on the card 20 or reproducing a signal from the card 20 is indicated by I
The C memory read / write control unit 30 detects. The IC memory read / write control unit 30 recognizes, based on the detected signal, whether communication with the card 20 has been successfully completed or an error has occurred. The IC memory read / write control unit 30 sends the recognized data to the CPU 5 as a signal, determines the information (whether the communication has been completed successfully or the communication error) sent to the CPU 5 having received the signal, and displays it on the display control unit 31. Data to be sent,
It is displayed on the display means 15. The CPU 5 sends data to the voice generating means 16 and causes the voice generating means 16 to generate a voice.

The above operation has been described by way of an example, but it goes without saying that other operations can also be executed. Each operation greatly differs depending on the system using the card 20 and the like. There is a need.

For example, a keyboard for inputting predetermined data is provided in the card reader 10 and, in addition to the display unit, a user name, an ID number, a current time, a purchased product name, a current point number, and the like are displayed. In the case where a liquid crystal display for displaying is provided, data input from the keyboard is sent to the CPU 5, and the CPU 5 determines the data.
The data is sent to the host computer 40, and if necessary, the data is transferred to the host computer 40.
If it is necessary to send data to the integrated circuit 23 in 0,
The data is sent to the IC memory read / write control unit 30,
The magnetic field accompanying the signal is output from the antenna unit 1 and data is recorded on the integrated circuit 23 in the card 20. Furthermore,
The CPU 5 determines the information (data from the keyboard, data from the host computer 40, and the like) sent to the CPU 5, and sends the data to be displayed to the display control unit if the display is necessary, and Various modifications, such as display on the display, are possible.

[0070]

An embodiment of such a card reader according to the present invention will be described below. Here, an antenna unit in which a magnetic member is attached to the front surface of the back surface of the loop antenna will be particularly described.

(Embodiment 1) The loop antenna has a carrier frequency of 13.56 MHz, and has a capacitor for adjusting a resonance circuit constituting the loop antenna. And a Mn-Zn ferrite core was used for the magnetic member. In the antenna unit of the first embodiment configured as described above,
The adjustment capacitor of the resonance circuit was adjusted to shift the resonance frequency from 13.56 MHz which is the carrier frequency. In the first embodiment, the resonance frequency is 18 MHz. Further, as for the degree to which the resonance frequency is shifted, in the loop antenna of the first embodiment, the resonance frequency is 13.56 ± 6 MHz.
Then, it was confirmed by experiments that at a distance of 3 m, 500 dBμV / m or less could be satisfied.

(Comparative Example 1) As in Example 1, the loop antenna has a carrier frequency of 13.56 MHz and has a capacitor for adjusting a resonance circuit constituting the loop antenna. And the magnetic member includes Mn-Zn
A ferrite core was used. In the antenna section of Comparative Example 1 configured as described above, the adjustment capacitor of the resonance circuit was adjusted to match 13.56 MHz, which is the carrier frequency, with the resonance frequency.

(Comparative Example 2) As in Embodiment 1, the loop antenna has a carrier frequency of 13.56 MHz, and has a capacitor for adjusting a resonance circuit constituting the loop antenna. In Comparative Example 2, no magnetic member was used. In the antenna unit of Comparative Example 2 configured as described above, the adjustment capacitor of the resonance circuit is adjusted,
The resonance frequency was shifted from the carrier frequency of 13.56 MHz. In Comparative Example 2, the resonance frequency was 20 M
Hz.

(Comparative Example 3) As in Example 1, the loop antenna has a carrier frequency of 13.56 MHz, and has a capacitor for adjusting a resonance circuit constituting the loop antenna. In Comparative Example 3, no magnetic member was used. In the antenna unit of Comparative Example 3 configured as described above, the adjustment capacitor of the resonance circuit is adjusted,
13.56 MHz which is a carrier frequency and its resonance frequency were matched.

The antenna units of Example 1 and Comparative Examples 1 to 3 obtained as described above were mounted on the card reader described in Embodiment 1, and a communication test with a non-contact IC card was performed. In this test, the electric field strength was measured and the power supply to the card was confirmed for each antenna unit of each example and comparative example. The test results are shown in Table 1 together with the resonance frequency of each antenna unit, the presence or absence of a magnetic member, the measured electric field strength, and the like.

[0076]

[Table 1]

In the evaluation items in Table 1, the evaluation criteria in the radio law regulation values are as follows: ○: within the regulation value, ×: outside the regulation value, and the evaluation criterion in the power supply is ：: acceptable; is there.

As is clear from the results, the card reader according to the first embodiment of the present invention provided with the antenna unit having the resonance frequency shifted and the magnetic member mounted thereon has the electric field strength within the regulation value of the Radio Law. , A good power supply could be performed.

[0079]

As described above, the present invention makes it possible to transmit and receive data and supply power to a non-contact IC card by using a weak radio wave that does not require a wireless license, thereby enabling communication between the non-contact IC card and the card reader. A non-contact IC card reader can be provided.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a card reader according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view showing a configuration of an antenna unit of the card reader according to the first embodiment of the present invention.

FIG. 3 is a graph showing a relationship between an electric field intensity output from a loop antenna of a card reader and a resonance frequency.

FIG. 4 is a perspective plan view showing a card used for a card reader according to the first embodiment of the present invention.

FIG. 5 is a block diagram showing a communication state between the card reader and the card according to the first embodiment of the present invention.

FIG. 6 is an external perspective view showing a card reader according to Embodiment 2 of the present invention.

FIG. 7 is an external perspective view showing a card reader according to Embodiment 2 of the present invention.

FIG. 8 is a perspective side view showing a card reader according to Embodiment 2 of the present invention.

FIG. 9 is a block diagram showing a card reader according to Embodiment 2 of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Antenna part 1a Loop antenna 1b Magnetic member 2 Control circuit board part 3 Power supply board part 4 Card proximity part 5 CPU 6 RF module 7 Clock generator 8 Modulation part 9 Demodulation part 10 Card reader 11 Filter circuit 12 Adjustment capacitor 13 Card slot Unit 14 marking unit 15 display means 16 sound generation means 17 cable escape groove 18 cable 20 card 21 base material 22 antenna unit 23 integrated circuit 30 IC memory read / write control unit 31 display control unit 40 host computer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01Q 7/06 G06K 19/00 HJ F term (Reference) 2C005 MA40 NA09 PA04 TA11 TA22 TA27 TA40 5B035 BA03 BB09 CA12 CA23 5B058 CA15 CA22 KA06 KA12 KA24 5J046 AA04 AB11 PA01 PA08

Claims (8)

[Claims] 1. A card reader provided with an antenna unit for performing at least data communication and power supply to a card, wherein the antenna unit is provided with a magnetic member. 2. The card reader according to claim 1, wherein a resonance frequency of an antenna of the antenna unit is made different from a carrier frequency output from the antenna unit. 3. The card reader according to claim 1, wherein the antenna of the antenna unit is a loop antenna. 4. The card reader according to claim 1, wherein said magnetic member is ferrite. 5. An electric field intensity output from said antenna unit is 500 μm at a distance of 3 m from said antenna unit.
The card reader according to any one of claims 1 to 4, wherein V / m is not more than V / m. 6. A card reader having at least an antenna unit for performing data communication and power supply to a card, wherein a magnetic member is provided on a surface of the antenna unit which is different from a direction of communication with the card. A card reader. 7. The card reader according to claim 1, further comprising a card slot for inserting a card. 8. The antenna device according to claim 1, wherein said antenna portion faces a control board portion for controlling said antenna portion, and said card slot portion is provided between said antenna portion and said control board portion. Item 7. The card reader according to Item 7.