JP2019169902A - IC card and IC card case - Google Patents

Abstract

To secure a large mounting area of an antenna for each communication system on a plane of limited size, by using multiple RFID tags capable of radiocommunication by different communication systems.SOLUTION: An IC card includes: a first board 2 having a first antenna 21 for transmitting and receiving signals by an electromagnetic induction system, and a first IC chip 22 connected with the first antenna; a second board 3 having a second antenna 32 for transmitting and receiving signals by a radio system, a second IC chip 33 connected with the second antenna, and a ground plane 31 connected with the second antenna; and a magnetic substance sheet 4 formed of a magnetic substance material. The first and second boards are laminated so that at least a part of the ground plane faces the first board, while interposing the magnetic substance sheet between both boards.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an IC card and an IC card case capable of wireless communication with different communication methods.

  In recent years, an RFID system that reads information recorded on an RFID tag or writes information on the RFID tag by wirelessly communicating with the RFID tag using a reader / writer has been spreading. Communication methods between the RFID system and the reader / writer include an electromagnetic induction method that performs wireless communication using electromagnetic induction and a radio wave method that performs wireless communication using radio waves. Such an RFID tag is used, for example, in an authentication system or an article management system.

  When using different communication methods in the RFID system, for example, when using both an authentication system using an electromagnetic induction RFID tag and an authentication system using a radio frequency RFID tag, from the viewpoint of user convenience It is desirable to combine the electromagnetic induction type RFID tag and the radio wave type RFID tag into one.

  A conventional technique that enables this is proposed in Patent Document 1. In the prior art of Patent Document 1, a coil antenna (spiral conductive object) and a monopole antenna (conductive object) are arranged on the same plane, and in electromagnetic induction communication, a coil antenna is used. In radio communication, a wireless communication device (RFID tag) configured to use a coil antenna and a monopole antenna is disclosed. According to this conventional technology, by sharing the coil antenna in each electromagnetic induction method and radio wave communication method, the mounting area of the antenna for each communication method on a limited size plane such as an IC card, It can be ensured larger than when the antennas are arranged in parallel.

Japanese Patent No. 5051213

  However, in the prior art disclosed in Patent Document 1, since the antennas for the respective communication systems are arranged on the same plane, it is still possible to ensure a large mounting area for each antenna on a plane having a limited size. There was a problem that could not. If a large mounting area of each antenna cannot be secured, each antenna cannot obtain sufficient antenna characteristics.

  The present invention has been devised in view of such problems of the prior art, and each communication method on a limited size plane using a plurality of RFID tags capable of wireless communication with different communication methods. An object of the present invention is to provide an IC card and an IC card case that can secure a large mounting area for the antenna.

  The IC card according to the present invention transmits and receives a signal by a radio wave system to and from a first substrate having a first IC chip connected to the first antenna and transmitting and receiving a signal by an electromagnetic induction system. A second substrate having a second antenna, a second IC chip connected to the second antenna, and a ground plane connected to the second antenna; and a magnetic sheet formed of a magnetic material The first substrate and the second substrate include the magnetic sheet interposed between the two substrates, and at least a part of the ground plane faces the first substrate. It is characterized by being laminated.

  According to the present invention, it is possible to secure a large mounting area of an antenna for each communication method on a limited size plane by using a plurality of RFID tags capable of wireless communication with different communication methods.

1 is a perspective view showing an IC card according to a first embodiment of the present invention. 1 is an exploded perspective view of the IC card shown in FIG. The top view which shows each component of the IC card which concerns on 1st Embodiment of this invention. The top view which shows each component of the IC card based on 2nd Embodiment of this invention The top view which shows each component of the IC card based on 3rd Embodiment of this invention. The top view which shows each component of the IC card based on 4th Embodiment of this invention. A top view showing an IC card case concerning a 5th embodiment of the present invention. The perspective view which shows the state before accommodating the existing IC card in the accommodating part of a case member The perspective view which shows the state after accommodating the existing IC card in the accommodating part of a case member

  A first invention made to solve the above problems includes a first antenna having a first antenna that transmits and receives signals by an electromagnetic induction method, and a first IC chip connected to the first antenna; A second substrate having a second antenna for transmitting and receiving signals by a radio wave system, a second IC chip connected to the second antenna, a ground plane connected to the second antenna, and a magnetic body A magnetic sheet formed of a material, wherein the first substrate and the second substrate have the magnetic sheet interposed between the substrates, and at least a part of the ground plane is the first substrate. It is characterized by being laminated so as to face one substrate.

  According to this, the first antenna that transmits and receives signals by the electromagnetic induction method and the second antenna that transmits and receives signals by the radio wave method can be arranged on different planes. Thereby, compared with the case where a 1st antenna and a 2nd antenna are arrange | positioned on the same plane, the mounting area of each antenna on the plane of a limited size can be ensured large. Further, since the magnetic sheet is interposed between the first substrate and the second substrate, communication of the first antenna or the second antenna is not hindered.

  According to a second aspect of the present invention, in the first aspect of the present invention, the second substrate includes a main body portion whose position overlaps with the first substrate, and the main body so that the position does not overlap with the first substrate. A protruding portion formed to protrude outward from an outer peripheral edge of the portion, wherein the second antenna and the second IC chip are arranged on the protruding portion.

  According to this, since the second antenna can be exposed to the first substrate side (that is, the front side of the IC card), the antenna characteristics of the second antenna can be improved.

  According to a third aspect of the present invention, in the second aspect, the magnetic sheet includes an opening at a central portion thereof, and the opening includes the first antenna and the first antenna of the first substrate. The IC chip is formed so as not to overlap with the IC chip.

  According to this, since the magnetic sheet can be formed from a smaller amount of the magnetic material, it is possible to reduce the manufacturing cost of the IC card. In addition, the portion of the ground plane that overlaps the position of the opening, that is, the portion that does not contact the magnetic material sheet can function as a part of the second antenna. As a result, the antenna characteristics of the second antenna can be improved.

  In a fourth aspect based on the first aspect, the outer shape of the second substrate is substantially the same as the outer shape of the first substrate, and at least the second in the magnetic sheet. A portion where the antenna overlaps with the antenna is cut out.

  According to this, the second substrate can be formed in a rectangular shape. As a result, the IC card of the present invention can be used in the same manner as an existing IC card, so that the convenience of the user at the time of storage or use is improved. Moreover, since it is possible to prevent the magnetic sheet from overlapping the position of the second antenna, the antenna characteristics of the second antenna can be improved.

  In a fifth aspect based on the fourth aspect, the first antenna and the first IC chip on the first substrate overlap with the notched portion of the magnetic sheet. It is arranged so that it does not become.

  According to this, mutual interference between the first antenna and the second antenna can be prevented. As a result, the antenna characteristics of the first antenna and the second antenna can be further improved.

  According to a sixth aspect of the present invention, there is provided a first IC card including a first antenna having a first antenna that transmits and receives a signal by an electromagnetic induction method, and a first IC chip connected to the first antenna. A second portion having a housing portion that can be freely inserted and removed, a second antenna that transmits and receives signals by a radio wave method, a second IC chip connected to the antenna, and a ground plane connected to the second antenna. And a case member provided integrally with a second IC card in which a magnetic sheet made of a magnetic material is laminated, and the first IC card is disposed in the housing portion. In the IC card case, the magnetic sheet is interposed between the first substrate and the second substrate when housed.

  According to this, by accommodating the existing IC card of the electromagnetic induction method in the case member integrally provided with the second substrate and the magnetic material sheet, it is possible to perform wireless communication by different communication methods and It is possible to secure a large mounting area for the antenna for each communication method on the plane of the determined size.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, a first embodiment of the present invention will be described. FIG. 1 is a perspective view showing an IC card according to the first embodiment of the present invention, and FIG. 2 is an exploded perspective view of the IC card shown in FIG.

  As shown in FIGS. 1 and 2, the IC card 1 includes a first substrate 2, a second substrate 3, and a magnetic sheet 4. The IC card 1 shown in FIG. 1 is configured by laminating the first substrate 2 and the second substrate 3 with the magnetic sheet 4 interposed therebetween. As an example, the first substrate 2 is the front side of the IC card 1 and the second substrate 3 is the back side of the IC card 1.

  FIG. 3 is a plan view showing each component of the IC card 1, where (a) shows the first substrate 2, (b) shows the magnetic sheet 4, and (c) shows the second substrate 3.

  As shown in FIG. 3A, the first substrate 2 has a rectangular (card-like) outer shape. Connected to the first substrate 2 are a first antenna 21 which is an antenna coil arranged in a loop around the outer periphery of the first substrate 2 and both ends of the first antenna 21. A first IC chip 22 is mounted. Although not shown, the exposed surface of the first substrate 2 is coated with a surface protective material such as polyethylene terephthalate (PET), PP (polypropylene), vinyl chloride (PVC), etc. The body sheet 4 does not contact.

  The first antenna 21 transmits and receives signals to and from an electromagnetic induction reader / writer (not shown) using an electromagnetic induction method. The electromagnetic induction method is a communication method for transmitting and receiving signals by magnetically coupling the antenna coil of the RFID tag and the antenna coil of the reader / writer. Signal transmission / reception between the first antenna 21 and the electromagnetic induction reader / writer is performed using a frequency in the HF band (for example, 13.56 MHz). A signal received by the first antenna 21 from the electromagnetic induction reader / writer is output to the first IC chip 22.

  The first IC chip 22 stores various information such as personal authentication information and article management information, and is equipped with a predetermined arithmetic processing function and the like. The first IC chip 22 performs arithmetic processing based on a command included in the signal input from the first antenna 21, and outputs the processing result to the first antenna 21. Then, the first antenna 21 transmits a signal including the processing result input from the first IC chip 22 to the electromagnetic induction reader / writer.

  As shown in FIG. 3C, the second substrate 3 includes a main body portion 3a having a rectangular shape substantially the same as the first substrate 2, and a protruding portion protruding outward from the outer peripheral edge of the main body portion 3a. 3b. The outer shape of the protruding portion 3b is smaller than the outer shape of the main body portion 3a. The protruding portion 3b has a rectangular outer shape, and is formed continuously with the main body portion 3a on the upper right side of the main body portion 3a. The position of the protruding portion 3b is not limited to the upper right side of the main body portion 3a, and may be various other positions as long as it is continuous with the main body portion 3a. Further, the shape and size of the protruding portion 3b can be arbitrarily changed.

  A ground plane 31 that is entirely metal is formed on the main body portion 3a, and a meander-shaped second antenna 32 and a second IC chip 33 connected to the ground plane 31 are formed on the protruding portion 3b. Has been implemented. Here, the ground plane 31 and the second IC chip 33 are connected by a meander line. One end of the second antenna 32 is connected to the ground plane 31.

  The shape of the second antenna 32 is not limited to the meander shape, and may be various shapes such as a straight shape (for example, an inverted L shape), a folded shape, and a loop shape. Further, the size of the second antenna 32 can be arbitrarily changed. The shape of the line connecting the ground plane 31 and the second IC chip 33 is not limited to the meander shape, and may be various shapes.

  The second antenna 32 transmits / receives a signal to / from a radio wave type reader / writer (not shown) by a radio wave type. The radio wave system is a communication system in which radio waves are exchanged between an RFID tag antenna and a reader / writer antenna to transmit and receive signals. Signal transmission / reception between the second antenna 32 and the radio wave reader / writer is performed using a UHF band frequency (eg, 920 MHz). A signal received by the second antenna 32 from the radio wave reader / writer is output to the second IC chip 33.

  Similar to the first IC chip 22, the second IC chip 33 stores various information such as personal authentication information and article management information, and is equipped with a predetermined arithmetic processing function and the like. . The second IC chip 33 executes arithmetic processing based on a command included in the signal input from the second antenna 32 and outputs the processing result to the second antenna 32. Then, the second antenna 32 transmits a signal including the processing result input from the second IC chip 33 to the radio wave type reader / writer.

  The magnetic sheet 4 shown in FIG. 3B has a rectangular outer shape that is substantially the same as that of the first substrate 2. The magnetic sheet 4 is made of a magnetic material, and serves to suppress the influence of the first antenna 21 of the first substrate 2 from the ground plane 31 of the adjacent second substrate 3. As a result, when the first antenna 21 performs wireless communication with an electromagnetic induction reader / writer on the front side of the IC card 1 (not shown), eddy current flows through the ground plane 31 and reaction magnetic flux is prevented from being generated. be able to. Then, an oscillating magnetic field from the card reader side is absorbed by the magnetic material sheet 4, passes through the magnetic material sheet 4, is reflected by the ground plane 31, and forms a magnetic path that returns to the reader / writer. The antenna 21 is electromagnetically coupled and can communicate with the reader / writer. Further, even when the electromagnetic induction type reader / writer is on the back side of the IC card 1, communication with the reader / writer can be performed by a magnetic field that wraps around the back side of the IC card 1. In addition, when the second antenna 32 performs wireless communication with the radio wave reader / writer, the second antenna 32 is connected to the ground plane 31 having a large area via the second IC chip 33, so that the antenna performance is improved. Can be secured.

  In the IC card 1 configured in this manner, the first antenna 21 is arranged on the first substrate 2, and the second antenna 32 is arranged on the second substrate 3. The two antennas 32 can be arranged on different planes. Thereby, compared with the case where the 1st antenna 21 and the 2nd antenna 32 are arrange | positioned on the same plane, the mounting area of each antenna 21 and 32 on the plane of a limited size can be ensured large. .

  Further, by arranging the second antenna 32 on the protruding portion 3b of the second substrate 3, contact with the magnetic material sheet 4 can be avoided, so that the antenna characteristics of the second antenna 32 (for example, Gain, radiation efficiency, etc.) can be improved.

  In the present embodiment, the first IC chip 22 and the second IC chip 33 are of the passive type using the signal received from the reader / writer as the power source. However, the first IC chip 22 and the second IC chip are used. 33 may be an active type that uses a built-in battery (not shown) as a power source.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the second embodiment, items not particularly mentioned below are the same as those in the first embodiment described above. The second embodiment is different from the first embodiment in that an opening 41 is formed in the magnetic sheet 4.

  FIG. 4 is a plan view showing each component of the IC card 1 according to the second embodiment of the present invention, wherein (a) is the first substrate 2, (b) is the magnetic sheet 4, and (c) is Each of the second substrates 3 is shown. Since the first substrate 2 in FIG. 4A and the second substrate 3 in FIG. 4C are the same as those in the first embodiment, description thereof is omitted.

  As shown in FIG. 4B, the magnetic sheet 4 includes an opening 41 provided in the central portion thereof and an outer peripheral portion 42 that surrounds the opening 41. The opening 41 is formed so as to open in a rectangular shape, and is formed so as not to overlap the position of the first antenna 21 of the first substrate 2. The outer peripheral portion 42 is formed so as to overlap the position of the first antenna 21 of the first substrate 2.

  As described above, when the opening 41 is provided in the central portion of the magnetic sheet 4, the magnetic sheet 4 can be formed from a smaller amount of magnetic material, so that the manufacturing cost of the IC card 1 can be reduced. It becomes possible. In addition, since the portion of the ground plane 31 that overlaps the position of the opening 41, that is, the portion that does not contact the magnetic material sheet 4, is formed, the portion can be efficiently functioned as the ground plane of the second antenna 32. As a result, the antenna characteristics of the second antenna 32 can be improved.

(Third embodiment)
Next, a third embodiment of the present invention will be described. In the third embodiment, matters not particularly mentioned below are the same as those in the above-described first embodiment. The third embodiment is different from the first embodiment in that the second substrate 3 does not have the protruding portion 3b and the notch 43 is formed in the magnetic material sheet 4.

  FIG. 5 is a plan view showing each component of the IC card 1 according to the third embodiment of the present invention, where (a) is the first substrate 2, (b) is the magnetic sheet 4, and (c) is Each of the second substrates 3 is shown. Since the first substrate 2 in FIG. 4A is the same as that in the first embodiment, description thereof is omitted.

  As shown in FIG. 5C, the second substrate 3 is formed in a rectangular shape that is substantially the same as the first substrate 2. A mounting region 34 for mounting the second antenna 32 and the second IC chip 33 is provided on the upper right side portion of the second substrate 3. The mounting region 34 is formed in a rectangular shape that is substantially the same as the protruding portion 3b shown in FIG. The ground plane 31 is formed in a portion other than the mounting region 34 on the second substrate 3.

  And as shown in FIG.5 (b), the part which the position overlaps with the mounting area | region 34 in the magnetic material sheet 4 is notched. That is, a cutout 43 having a rectangular shape substantially the same as the mounting region 34 is formed in the upper right portion of the magnetic sheet 4.

  In this way, by forming the second substrate 3 in substantially the same rectangular shape as the first substrate 2, the IC card 1 can be used in the same manner as an existing IC card. And user convenience during use is improved. Further, by forming the notch 43 in the magnetic sheet 4, it is possible to prevent the magnetic sheet 4 from overlapping the position of the second antenna 32, thereby improving the antenna characteristics of the second antenna 32. be able to.

  In the example of FIG. 5, the position of the mounting region 34 of the second substrate 3 is the upper right side portion of the second substrate 3, but is not limited to this, and may be various other positions. It's okay. However, considering the antenna characteristics of the second antenna 32, it is desirable to provide the mounting region 34 at the corner of the second substrate 3. Further, the shape and size of the mounting area 34 can be arbitrarily changed.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. In the fourth embodiment, matters not particularly mentioned below are the same as those in the third embodiment described above. The fourth embodiment is different from the third embodiment in that the first antenna 21 of the first substrate 2 is disposed so as not to overlap the position of the notch 43 of the magnetic material sheet 4.

  FIG. 6 is a plan view showing each component of the IC card 1 according to the fourth embodiment of the present invention, where (a) is the first substrate 2, (b) is the magnetic sheet 4, and (c) is Each of the second substrates 3 is shown. Since the magnetic material sheet 4 in FIG. 5B and the second substrate 3 in FIG. 5C are the same as those in the third embodiment, description thereof is omitted.

  As shown in FIG. 6A, the first antenna 21 and the first IC chip 22 of the first substrate 2 are arranged so as not to overlap with the cutout portions 43 of the magnetic sheet 4. 2 is arranged avoiding the upper right side portion. That is, the right side of the upper side 21 a of the first antenna 21 is bent downward along the left side 43 a of the cutout 43 of the magnetic sheet 4, and then bent rightward along the lower side 43 b of the cutout 43. . Since the first IC chip 22 is disposed on the left side portion of the first substrate 2, the position does not overlap with the cutout portion 43 of the magnetic sheet 4.

  Thus, by arranging the first antenna 21 of the first substrate 2 so as not to overlap the mounting region 34 of the second substrate 3, the first antenna 21 and the second antenna 32 are Mutual interference can be suppressed. Thereby, the antenna characteristics of the first antenna 21 and the second antenna 32 can be further improved.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described. In the fifth embodiment, items not particularly mentioned below are the same as those in the first embodiment, the second embodiment, or the third embodiment described above. This fifth embodiment is different from these embodiments in that it further includes a case member 5.

  FIG. 7 is a plan view showing an IC card case 7 according to the fifth embodiment of the present invention. As shown in FIG. 7, an IC card case 7 according to a fifth embodiment of the present invention includes a case member 5, an accommodating portion 51 that can accommodate an existing electromagnetic induction type IC card 6, and a second portion. Substrate 3 and magnetic sheet 4. The existing IC card 6 accommodated in the accommodating part 51 shall have the same structure as the 1st board | substrate 2 of 1st Embodiment. The second substrate 3 and the magnetic sheet 4 are integrated with the case member 5 in a stacked state.

  The case member 5 is formed in the same shape as a general ID card holder, and here, it is assumed that the case member 5 has a strap 52 for hanging on the user's neck. In addition, the case member 5 has an accommodating portion 51 that can accommodate the IC card 6 in a freely removable manner. FIG. 8 is a perspective view illustrating a state before the existing IC card 6 is accommodated in the accommodating portion 51 of the case member 5, and FIG. 9 illustrates a state after the existing IC card 6 is accommodated in the accommodating portion 51. It is a perspective view shown.

  The accommodating part 51 is configured so that the IC card 6 can be aligned so that the IC card 6 is stacked on the magnetic sheet 4 when the IC card 6 is accommodated. Therefore, as shown in FIG. 9, the IC card 6 can be stacked on the magnetic sheet 4 by accommodating the IC card 6 in the accommodating portion 51. That is, a three-layer structure (see FIG. 2) similar to that of the first embodiment in which the IC card 6, the magnetic sheet 4, and the second substrate 3 are laminated in that order can be configured.

  7, 8, and 9, a state in which the second substrate 3 of the first embodiment and the magnetic sheet 4 are laminated is illustrated, but the second substrate of the second embodiment is illustrated. 3 and the magnetic sheet 4 may be laminated, or the second substrate 3 and the magnetic sheet 4 of the third embodiment may be laminated.

  Thus, according to the fifth embodiment, the electromagnetic induction IC card 6 can be used to realize the same configuration as that of the first embodiment, the second embodiment, and the third embodiment. . In other words, an electromagnetic induction type existing IC card 6 is accommodated in an IC card case 7 so that a plurality of RFID tags capable of wireless communication with different communication methods are stacked, and on a limited size plane. It is possible to secure a large mounting area of the antenna for each communication method.

  As mentioned above, although this invention was demonstrated based on specific embodiment, these embodiment is an illustration to the last, Comprising: This invention is not limited by these embodiment. Further, all the components of the IC card and the IC card case according to the present invention shown in the above embodiments are not necessarily essential, and can be appropriately selected as long as they do not depart from the scope of the present invention. .

  The IC card and the IC card case according to the present invention ensure a large mounting area of an antenna for each communication method on a limited size plane by using a plurality of RFID tags capable of wireless communication with different communication methods. It is useful as an IC card and an IC card case.

DESCRIPTION OF SYMBOLS 1 IC card 2 1st board | substrate 3 2nd board | substrate 4 Magnetic material sheet 5 Case member 6 Existing IC card of electromagnetic induction system 7 IC card case 21 1st antenna 22 1st IC chip 3a Main body part 3b Projection part 31 Ground Plane 32 Second Antenna 33 Second IC Chip 34 Mounting Area 41 Opening Part 42 Outer Peripheral Part 43 Notch 51 Receiving Part 52 Strap

Claims (6)

A first antenna having a first IC chip connected to the first antenna for transmitting and receiving signals by electromagnetic induction; and a first substrate connected to the first antenna;
A second substrate having a second antenna for transmitting and receiving signals in a radio wave system, a second IC chip connected to the second antenna, and a ground plane connected to the second antenna;
A magnetic sheet formed from a magnetic material,
The first substrate and the second substrate are laminated such that the magnetic sheet is interposed between the two substrates and at least a part of the ground plane is opposed to the first substrate. IC card characterized by that. The second substrate includes a main body portion whose position overlaps with the first substrate, and a protruding portion formed so as to protrude outward from an outer peripheral edge of the main body portion so as not to overlap with the first substrate. Including
2. The IC card according to claim 1, wherein the second antenna and the second IC chip are arranged on the protruding portion. The magnetic sheet includes an opening at a central portion thereof.
The IC card according to claim 2, wherein the opening is formed so as not to overlap the first antenna and the first IC chip of the first substrate. The outer shape of the second substrate has substantially the same shape as the outer shape of the first substrate,
2. The IC card according to claim 1, wherein at least a portion of the magnetic sheet overlapping with the position of the second antenna is cut out.   5. The first antenna and the first IC chip on the first substrate are arranged so as not to overlap with the notched portion of the magnetic sheet. IC card of description. A first antenna that transmits and receives signals by electromagnetic induction, and a first IC card that includes a first substrate having a first IC chip connected to the first antenna. When,
A second antenna that transmits and receives signals by a radio wave system, a second IC chip connected to the antenna, a second substrate having a ground plane connected to the second antenna, and a magnetic material. And a case member provided integrally with a second IC card laminated with a magnetic sheet
An IC card case, wherein the magnetic sheet is interposed between the first substrate and the second substrate when the first IC card is accommodated in the accommodating portion.

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