JP3960447B2 - Non-contact IC card and its charging device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a non-contact power transmission device that transmits electric power or a signal or both at the same time in a non-contact manner by electromagnetic induction generated between coils.
[0002]
[Conventional art]
Conventionally, a non-contact power transmission device 50 as shown in FIG. 7 is known. In the non-contact power transmission device 50, a charger 56 is used as a power or signal transmission device that supplies at least one of power and signals to the non-contact IC card 51.
[0003]
In the conventional non-contact IC card 51, a flat soft magnetic body 52a is provided on a card substrate 54, and a coil 53a having a flat meander coil shape or a flat spiral coil shape is further provided thereon. Was formed. In addition, the charger 56 is provided with a similar flat soft magnetic body 52b on one surface facing the coil forming surface of the non-contact IC card 51, and a coil having a planar meander coil shape or planar spiral coil shape thereon. Thus, the power transmission part 55b was formed. In this way, the coils 53a and 53b are matched with each other by the soft magnetic bodies 52a and 52b sandwiched on the transmission and reception side. Therefore, the direction of the power receiving unit is limited, and thus the direction of the non-contact IC card 51 with respect to the charger 56 is also limited.
[0004]
Further, in the charger 56 on the power transmission side, the non-contact power transmission coil 53b is only on one side, and the power receiving side and the power transmission side are limited to the direction with the soft magnetic body in the back.
[0005]
[Problems to be solved by the invention]
As described above, the contactless power transmission device according to the prior art has a fixed direction on the power receiving side. For example, when considering a card-like device, it is necessary to bring power closer to a surface that matches the direction of the power transmission side. Transmission is performed, but transmission becomes impossible when the opposite surface is brought close.
[0006]
Specifically, in the case shown in FIG. 7, when the non-contact IC card 51 is placed on the back side, power cannot be transmitted. Moreover, when the opposite surface is brought closer, the soft magnetic material is also heated by induction heating.
[0007]
Therefore, one technical problem of the present invention is to provide a non-contact IC card capable of non-contact power transmission without considering the front and back of the IC card.
[0008]
In addition, another technical problem of the present invention is that charging for a non-contact IC card capable of non-contact power transmission that can perform power transmission to a non-contact IC card capable of non-contact power transmission without considering the front and back of the IC card. To provide an apparatus.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, in the present invention, a power transmission coil and a soft coil are installed on both surfaces of a non-contact IC card having a power transmission coil and a soft magnetic material mounted on both sides, or a charger side storage portion on the power transmission side. One of the non-contact power transmission chargers equipped with a magnetic material is used.
[0010]
That is, according to the present invention, in a non-contact IC card capable of transmitting not only signals but also power in a non-contact manner, the power / signal transmission / reception unit comprising a non-contact power transmission coil and a soft magnetic material is provided on both sides of the card. A non-contact IC card characterized by being mounted on the card is obtained.
[0011]
According to the present invention, in the contactless IC card, the power / signal transmission / reception unit is provided on both sides of the card, so that the contactless IC card can receive twice the power. .
[0012]
In addition, according to the present invention, in the charging device that supplies and charges power in a contactless IC card that can transmit not only signals but also power in a contactless manner, the housing portion that accommodates the contactless IC card. And a power / signal transmission / reception unit made up of a coil for non-contact power transmission and a soft magnetic material is disposed on each of the opposing surfaces facing the front and back of the non-contact IC card. A non-contact IC card charging device capable of non-contact power transmission is obtained.
[0013]
According to the present invention, in the non-contact IC card charging device capable of non-contact power transmission, the card accommodated includes the power / signal transmission / reception unit on both sides or on one side, or If the received card is a non-contact IC card and includes the power / signal transmission / reception unit, corresponding to the number of the power / signal transmission / reception units, A charging device having a configuration for controlling the amount of magnetic flux generated from the non-contact power transmission coil can be obtained.
[0014]
Furthermore, according to the present invention, in any one of the charging devices, the non-contact IC card includes the power / signal transmission / reception unit on both sides, and is charged from both sides, so that double the power as compared with one side is obtained. A charging device characterized by being able to transmit is obtained.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 is a cross-sectional view of a non-contact IC card according to an embodiment of the present invention. As shown in FIG. 1, a non-contact IC card 10 is provided with a flat soft magnetic body 2a on both surfaces of a card base 1 made of an insulator, and a coil 3a having a planar meander coil shape or a planar spiral coil shape thereon. Thus, the power receiving unit 5a as an example of the power / signal transmitting / receiving unit is formed. In this way, power can be transmitted regardless of the front and back by configuring the front and back to have the same shape.
[0017]
FIG. 2 is a diagram illustrating an example of power transmission of the non-contact IC card 10 of FIG. As shown in FIG. 2, the charger 60 is provided with a flat soft magnetic body 52b on one surface of the housing 61, and a coil 53b having a flat meander coil shape or a flat spiral coil shape is further provided thereon. The power receiving unit 55a is formed and has substantially the same structure as that of the prior art.
[0018]
The non-contact IC card 10 shown in FIG. 1 is capable of non-contact power transmission in a charger 60 according to the prior art. Thus, the non-contact IC card 10 according to the embodiment of the present invention can be charged regardless of the direction.
[0019]
FIG. 3 is a cross-sectional view showing a non-contact IC card charger according to an embodiment of the present invention. As shown in FIG. 3, the charger 20 according to the first embodiment of the present invention is provided with a flat soft magnetic body 2 b on the opposing surface in the accommodating portion 21, and further has a planar meander coil shape or A planar spiral coil-shaped coil 3b is provided, and power transmission units 5b and 5b as examples of a power / signal transmission / reception unit are formed, and one surface of the coil 3b is exposed and embedded.
[0020]
By using the charger 20 having such a configuration, the transmission surface, that is, the area of the power transmission unit is doubled and the transmission amount is also doubled. Therefore, the transmission power is 2PI, or the charging time and the transmission area are halved. I can do it.
[0021]
FIG. 4 is a cross-sectional view for explaining the case where power is transmitted to a conventional non-contact IC card using the non-contact charger of FIG.
[0022]
As shown in FIG. 4, a magnetic flux is generated only in the coil 3b on the power transmission unit 5b side on the opposing surface 22 of the coil 53a on the power reception unit 55a side, and the coil 3b on the power transmission side provided on the other surface 23 Magnetic flux is not generated. If comprised in this way, it can be used also for the conventional non-contact IC card.
[0023]
Similarly, FIG. 5A is a cross-sectional view for explaining an example of transmitting power to a non-contact IC card having a conventional structure using the non-contact charger of FIG. 3, and FIG. 5B is a schematic circuit diagram thereof. FIG.
[0024]
As shown in FIGS. 5A and 5B, the non-contact IC card as the power transmitting / receiving surface detecting means for detecting the power transmitting / receiving surface is opposed to the light emitting element 6 on the surface on the power receiving unit 55a side. An optical switch circuit shown in the circuit diagram of FIG. 5B is configured by the light receiving element 7a and the coil 3b on the power transmission unit 5b side of the charger 30 and the coil 3b on the back side of the power transmission unit 5b. When the light receiving element 7a receives light from the light emitting element 6, the optical switch is turned on to supply power to the coil 3b of the power transmission unit 5b.
[0025]
Therefore, in the case shown in FIG. 5A, a magnetic flux is generated only in the coil 3b on the power transmission unit 5b side on the opposing surface 22 of the coil 53a on the power reception unit 55a side, and the power transmission provided on the other surface 23 is performed. Magnetic flux is not generated in the side coil 3b. If comprised in this way, the charger 30 can be used also with respect to the conventional non-contact IC card.
[0026]
6A is a cross-sectional view for explaining another example of transmitting power to a non-contact IC card having a conventional structure using the non-contact charger of FIG. 3, and FIG. It is a circuit schematic diagram.
[0027]
As shown in FIGS. 6A and 6B, the non-contact IC card is provided with a protrusion 8 on the surface on the power receiving portion 55a side as a power transmitting / receiving surface detecting means for detecting the power transmitting / receiving surface. Further, the charger 40 is provided with switches 9 and 9 each having an opening / closing portion that opens and closes a contact at a position corresponding to the position of the protruding portion. The switches 9 and 9 cut off and connect the first and second drive power supplies that supply power to the coil 3b on the power transmission section 5b side and the coil 3b on the rear power transmission section 5b side, respectively.
[0028]
As shown in FIG. 6A, when the non-contact IC card 51 is accommodated in the accommodating portion 21, the open / close portion of the left switch 9 is lowered by the protrusion 8 and is closed. On the other hand, the switch 9 on the right side is not opened, so it remains open. As shown in FIG. 6B, both ends of these switches 9 and 9 are connected to a coil drive power supply source (not shown), and the power supply is connected and cut off by the ON and OFF of the switches 9 and 9. The
[0029]
Therefore, in the case shown in FIG. 6A, the switch 9 of the coil 3b on the power transmission unit 5b side on the opposing surface 22 of the coil 53a on the power reception unit 55a is turned on to generate magnetic flux, and the other surface 23 Since the switch 9 of the coil 3b on the power transmission side provided in is OFF, magnetic flux is not generated.
[0030]
If comprised in this way, it can be used also for the conventional non-contact IC card 51.
[0031]
【The invention's effect】
As described above, according to the present invention, it can be used regardless of the orientation, and power can be transmitted from both sides by arranging the power transmission side on both sides. It is possible to provide a non-contact IC card and a charging device thereof that can be downsized.
[0032]
Further, according to the present invention, the power transmission surface is made double-sided with respect to the non-contact IC card capable of non-contact power transmission, or the transmission coil and the soft magnetic material are arranged on both surfaces inside the non-contact power transmission charger. By doing so, it is possible to provide a non-contact IC card and its charging device that are independent of the direction and improve the usability.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a non-contact IC card according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an example of power transmission of the non-contact IC card 10 of FIG.
FIG. 3 is a cross-sectional view showing a non-contact IC card charger according to an embodiment of the present invention.
4 is a cross-sectional view for explaining the case where power is transmitted to a conventional non-contact IC card using the non-contact charger of FIG. 3. FIG.
FIG. 5A is a cross-sectional view for explaining an example of transmitting power to a conventional non-contact IC card using the non-contact charger of FIG. 3;
(B) is the circuit schematic of (a).
6A is a cross-sectional view used for explaining another example of transmitting power to a conventional non-contact IC card using the non-contact charger of FIG. 3;
(B) is the circuit schematic of (a).
FIG. 7 is a diagram illustrating a non-contact power transmission apparatus according to a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Card base | substrate 2a, 2b Soft magnetic body 3a, 3b Coil 5a, 55a Power receiving part 5b, 55b Power transmission part 6 Light emitting element 7a, 7b Light receiving element 8 Protrusion part 9 Switch 10, 51 Non-contact IC card 20, 30, 40, 60 Charger 21, 61 Housing 22 Opposing surface 23 One surface 50 Non-contact power transmission device 52a, 52b Soft magnetic material 53a, 53b Coil

Claims (5)

In a non-contact IC card that can transmit not only signals but also power in a non-contact manner, a non-contact power transmission coil and a power / signal transmission / reception unit made of a soft magnetic material are mounted on both sides of the card. Non-contact IC card. 2. The non-contact IC card according to claim 1, wherein the power / signal transmission / reception unit is provided on both sides of the card so that double power reception is possible. In a charging device that supplies and charges power in a contactless IC card that can transmit not only signals but also power in a contactless manner, the charging device includes a storage portion that stores the contactless IC card, Non-contact power transmission is possible, characterized in that a non-contact power transmission coil and a power / signal transmission / reception unit made of a soft magnetic material are arranged on each of the opposing surfaces facing the front and back of the non-contact IC card. Charger for contactless IC card. 4. The contactless IC card charging apparatus capable of transmitting contactless power according to claim 3, wherein the card to be accommodated has the power / signal transmitting / receiving unit on both sides or on one side, or on either side. If it is detected whether or not the received card is a non-contact IC card and includes the power / signal transmission / reception unit, the non-contact power corresponds to the number of the power / signal transmission / reception units. A charging device comprising a configuration for controlling the amount of magnetic flux generated from a transmission coil. 5. The charging device according to claim 3, wherein the non-contact IC card includes the power / signal transmission / reception unit on both sides, and is capable of transmitting twice the electric power as compared with one side by charging from both sides. Charging device.

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