JP4551641B2 - Portable electronic device with non-contact data communication function - Google Patents

Description

The present invention is a portable electronic apparatus having a non-contact data communication function, particularly RFID (R adio F requency Id entification , hereinafter referred to as RFID) relates.

  Many of the conventional RFIDs used for electronic payments have a card shape, but recently, there are an increasing number of cases in which the RFID is incorporated into a mobile phone, PDA, or a watch (for example, (See Patent Document 1).

  12 and 13 are sectional views of a conventional portable electronic device and a reader / writer. FIG. 12 is a sectional view when the portable electronic device is placed parallel to the reader / writer. FIG. 13 is a portable electronic device. It is sectional drawing when an apparatus is placed perpendicularly with respect to a reader / writer. FIG. 11 is a diagram showing the positional relationship between a user and a reader / writer in a general store.

  In contactless data communication, an electromagnetic wave is transmitted from an antenna of a reader / writer, and the RFID receives both power and data from the electromagnetic wave. Reference numeral 40 denotes a portable electronic device with a built-in RFID having a non-contact communication function. In this embodiment, the portable electronic device is a watch. Reference numeral 9 denotes a circuit board on which an IC (not shown) having a data communication function and a data storage function is mounted. Reference numeral 3 denotes a loop antenna wired on the circuit board 9. A combination of the loop antenna 3 and the IC having the communication function and the data storage function is referred to as RFID 10 in the present invention. Reference numeral 4 denotes a timepiece movement for driving hour, minute and second hands, and reference numeral 5 denotes a dial.

  Reference numeral 20 denotes a reader / writer for accessing data in the RFID 10 of the portable electronic device 40. In the reader / writer 20, an antenna pattern 22 is formed on an antenna substrate 21, and communication with the RFID 10 and power supply are performed via the antenna pattern 22.

  In the relationship between the portable electronic device 40 and the reader / writer 20 configured as described above, when the antenna surfaces face each other as shown in FIG. 12, electromagnetic waves emitted from the antenna 22 surface of the reader / writer 20 are carried by the mobile phone. Communication is possible under good conditions because the direction in which the induced current flows through the antenna 3 on the electronic device 40 side.

  On the other hand, when the antenna surfaces are perpendicular to each other as shown in FIG. 13, the electromagnetic wave emitted from the antenna 22 on the reader / writer 20 side cannot cause an induced current to flow through the antenna 3 on the portable electronic device 40 side. In such a positional relationship, even if the distance between the reader / writer 20 and the RFID 10 is shortened, stable communication cannot be performed.

In general, since the RFID 10 is often a card, the antenna 22 of the reader / writer 20 is generally directed toward the ceiling or tilted at a slight angle on the user side. The relationship shown in FIG. It has become. Reference numeral 31 denotes a POS terminal, 32 denotes an RFID reader / writer having a non-contact communication function, 33 denotes a user, 34 denotes a store clerk, and 35 denotes a counter. Reference numeral 36 denotes an antenna coil surface of the reader / writer 32, which is inclined to the user 33 side or facing the ceiling and is mostly on the left hand side of the user 33.

  Conventionally, since the RFID 10 is mainly in the shape of a card, many reader / writers 32 are designed for a card, and the card is easy to place. When the RFID 10 is not in the card shape but built in the portable electronic device 40 with respect to the reader / writer 32 having this shape, it cannot be placed like a card, so that the user can hold it in his hand or It is required to be used while attached.

Japanese Patent Laid-Open No. 2002-277469 (FIGS. 2 and 3)

  When the RFID 10 is in the shape of a card, the card is thin, so the way it is placed or held up is limited to some extent, so there is no problem in thoroughly disseminating how to use it, but when the RFID 10 is mounted on a mobile phone, PDA, etc. Since there is a certain degree of freedom in how to hold and place the device, communication may become unstable depending on the placement due to the directivity of the antenna of the RFID 10.

  In the case of a wristwatch, the position of the RFID 10 in the wristwatch and the direction of the antenna are almost limited with respect to the exterior of the watch. That is, when the antenna 10 of the RFID 10 in the wristwatch is directed in a direction with good directivity, the positional relationship of the wristwatch with respect to the reader / writer 32 is limited, and the direction and placement of the wrist are also limited. there were.

  In the case of placing the reader / writer 32 as shown in FIG. 11, in order to enable communication, in the case of a mobile phone or a PDA, the reader / writer 32 must be placed while paying attention to the direction every time. In the case of a wristwatch, the back side of the left wrist must be applied to the antenna surface 36 on the lower left side of the user 33 with the inner side of the left arm facing forward, which imposes an unnatural posture on the user. There was a problem.

  As described above, in the conventional technique, there is a problem in that there is a limitation in how the RFID 10 is placed because communication between the reader / writer 32 and the RFID 10 has directivity. As an extreme example, when the antenna surfaces are perpendicular to each other as shown in FIG. 13 described above, electromagnetic waves emitted from the antenna 22 of the reader / writer 20 can cause an induced current to flow through the antenna 3 of the RFID 10. Therefore, there was a problem that communication could not be performed stably. In addition, there is a problem in that stable communication is often not possible when the antenna surfaces are not directly facing even if they are not vertical.

  Since the portable information terminal has various shapes and sizes, it is difficult to specify a position. Depending on how the portable information terminal is held, it may be difficult to communicate and settlement may be difficult. In the case of a terminal that is worn on the arm, such as a wristwatch, the movable range of the human arm is limited, and the back side of the wrist is connected to the antenna of the reader / writer 32 in order to perform communication stably. Since it is necessary to face the coil surface 36 directly, the positional relationship between the user 34 and the antenna coil surface 36 as shown in FIG. 11 has a problem that communication is not possible unless an unnatural posture is taken.

  In the case of a wristwatch, the user's posture is much easier when the dial is placed vertically than when the face of the watch dial is directly facing the antenna coil surface of the reader / writer. However, in the past, communication was impossible with such a placement.

In the wristwatch described in Patent Document 1, the angle of the antenna coil surface is set so as to fit the movable range of the human arm so that the user can easily communicate with the reader / writer without having to take an unnatural posture. Although it is possible to place the RFID inside the watch in a direction that is sensitive to the reader / writer even in a comfortable posture, this method simply rotates the directivity pattern of the RFID antenna inside the wristwatch However, there is a drawback that the direction of poor sensitivity appears in a different direction. As described above, in the case of a general portable electronic device, since a user's way of holding and placing are not fixed, it is desirable not only to rotate the directivity pattern but also to smooth the directivity.

  The objective of this invention is providing the portable electronic device provided with the non-contact data communication function which extended the above-mentioned directivity as much as possible.

To achieve the above object, a non-contact communication unit including an antenna for performing non-contact data communication and a transmission / reception means, a case body housing the non-contact communication unit, and the antenna surface inside the case body possess an electromagnetic wave reflector arranged at an angle, the opening is provided in the case body further includes a rear cover for closing the opening, the electromagnetic wave reflecting plate, the case body side of the back cover It is characterized by being provided integrally .

With such a configuration, even when the antenna of the reader / writer and the antenna in the portable electronic device are perpendicular to each other, the reflector is arranged so as to be inclined with respect to the antenna opening surface. The direction of the electromagnetic wave is changed, and the electromagnetic wave can be inserted into the antenna opening of the portable electronic device, so that communication can be performed. Furthermore, it becomes easier to manufacture and repair portable electronic devices.

Moreover, it has the guide means for positioning for determining the direction of the said back cover with respect to the said case body .

Further, the electromagnetic wave reflection plate is formed by processing the back cover .

  Further, a non-contact communication unit including an antenna for performing non-contact data communication and a transmission / reception means, a case body that accommodates the non-contact communication unit, and an angle with the antenna surface are disposed inside the case body. And a part of the electromagnetic induction plate is disposed along a conductor constituting the antenna.

By configuring in this way, the electromagnetic induction plate is not parallel to the reader / writer antenna even when the reader / writer antenna and the antenna in the portable electronic device are perpendicular to each other. An induced current is generated and a magnetic field is generated around the electromagnetic induction plate. The magnetic field around the electromagnetic induction plate causes an induced current to flow through the antenna in the portable electronic device.
The magnetic field generated in the electromagnetic induction plate is generated in a direction that cancels the magnetic field from the reader / writer. However, in the case of the above-described placement, only the component parallel to the RFID antenna is canceled and perpendicular to the RFID antenna. Effective ingredients are not countered. The induction current is secondarily generated in the RFID antenna by a magnetic field generated by the induction current generated in the electromagnetic induction plate, and communication can be performed.

  In addition, a plurality of the electromagnetic induction plates insulated from each other are arranged so as to surround a non-contact communication unit including an antenna for performing non-contact data communication and a transmission / reception means.

With this configuration, the direction in which the reader / writer and the RFID can communicate can be expanded or changed as necessary.

ADVANTAGE OF THE INVENTION According to this invention, the directivity of the communication antenna which can be put in the portable information terminal which has a non-contact data communication function can be expanded. By arranging the reflector in the portable information terminal so as to be inclined with respect to the antenna, the direction of the electromagnetic wave can be changed to an electromagnetic wave having an effective component with respect to the antenna. This makes it possible to provide a terminal with less device posture restrictions when used by the user.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 and 2 are cross-sectional views of a portable electronic device and a reader / writer showing a first embodiment of the present invention. FIG. 1 shows a state in which the portable electronic device is placed parallel to the reader / writer. FIG. 2 is a sectional view when the portable electronic device is placed perpendicular to the reader / writer. 5 is a top view showing an embodiment of the reflector of FIGS. 1 and 2, FIG. 6 is a plan view of the RFID of FIGS. 1 and 2, and FIG. 7 is a relationship between the RFID of FIG. 1 and FIG. It is a system block diagram of RFID shown.

  1 and 2, 4 is a timepiece movement for driving hour, minute, and second hands, and 10 is an RFID that is a non-contact communication unit for performing non-contact data communication. The ring-shaped space around the outer periphery of the timepiece movement 4 is shown in FIG. As shown in FIG. 6, the RFID 10 is an IC chip 12 having a donut-shaped circuit board 9, a loop-shaped antenna 3 formed on the circuit board 9, a non-contact data communication function and storage means. And the antenna tuning capacitor 11, and the watch movement 4 enters the opening 9 a in the center of the circuit board 9 of the RFID 10.

  The RFID 10 receives an electromagnetic wave having a resonance frequency determined by the antenna 3 and the antenna tuning capacitor 11 to generate a DC voltage by a power generation circuit inside the IC chip 12 so that the circuit inside the IC chip 12 operates with the voltage. It has become. In the present embodiment, the outer shape of the circuit board 9 of the RFID 10 is circular, but of course, it may be a polygon such as a rectangle, a square, or a hexagon.

5 is a dial plate, 6 is a case body, 2 is an electromagnetic wave reflection plate made of a metal material, and the electromagnetic wave reflection plate 2 is disposed at a certain angle (θ) with the surface of the antenna 3 inside the case body 6. In the embodiment, a case where an angle of 15 ° is provided with respect to the surface of the antenna 3 is shown. The shape of the reflecting plate 2 may be a simple shape obtained by pulling out one plate as shown in FIG. 5 (a), or in order to suppress the generation of eddy current as much as possible as shown in FIGS. 5 (b) and 5 (c). A slit may be provided in the vertical and horizontal directions or in the radial direction, or a slit may be provided in a spiral shape as shown in FIG. 5 (d).
The shape shown in FIG. 5F or the shape shown in FIG. 5F in which small squares are arranged vertically and horizontally with a narrow gap may be used. 5 (b), (c), (d), and (f), a plate of the above shape is attached to an insulating member such as plastic, or the plastic base material is This can be realized by molding such as embedding a metal plate.

  The wristwatch type portable electronic device 1 having a non-contact data communication function is configured by housing the above-described watch movement 4, RFID 10, electromagnetic wave reflection plate 2, and dial plate 5 inside the case body 6. Yes. Although not shown, the portable electronic device 1 is equipped with a band and is worn on the wearer's arm.

  1 and 2, reference numeral 20 denotes a reader / writer for accessing data in the RFID 10, and a coiled antenna pattern 22 is formed on an antenna substrate 21 in a case body 23 of the reader / writer 20. Communication with the RFID 10 and power supply are performed via the antenna pattern 22. 1 and 2, the reader / writer 20 shows only an antenna coil circuit board 21 and a coiled antenna pattern 22 that are physically necessary for communication.

  Next, an RFID system block diagram showing a relationship between the RFID of FIG. 1 and FIG. 2 and a reader / writer will be described with reference to FIG. The RFID 10 includes an IC chip 12 including an antenna 3 corresponding to the antenna 3 and the tuning capacitor 11 shown in FIG. 6, a CPU 12b, a memory 12d, a power generation unit 12a, and a communication control unit 12c. The IC chip 12 constitutes transmission / reception means. In addition, although the antenna 13 is comprised by the parallel resonance circuit by a coil and a capacitor | condenser, the structure which becomes a series resonance circuit may be sufficient depending on the circuit structure of the power generation part 12a.

  The reader / writer 20 includes a CPU 26, a communication control unit 25, a power supply circuit 24, an external interface unit 27, and an antenna 22. In the reader / writer 20, the CPU 26 receives the data transferred from the host computer through the external interface unit 27 and transfers it to the communication control unit 25. The communication control unit 25 modulates the data and emits the data together with power to the outside through the antenna 22 as electromagnetic waves.

  The RFID 10 receives the electromagnetic wave emitted from the reader / writer 20 by the antenna 3 (13), and sends it to the power generation unit 12a and the communication control unit 12c. The power generation unit 12a rectifies the received AC signal into a direct current in order to use it as a power source inside the IC chip 12. On the other hand, the communication control unit 12c receives supply of power from the power generation unit 12a, demodulates the received AC signal, and makes it a signal that the CPU 12b can discriminate. The CPU 12b accesses the memory 12d by the signal and returns a response to the reader / writer 10 via the communication control unit 12c and the antenna 3 (13), thereby completing one sequence.

  Now, it is the opening area and the direction of the antenna 3 that are involved in the reception status of electromagnetic waves in the RFID 10. The antennas 3 (13) and 22 in this embodiment are like a transformer because both the RFID 10 and the reader / writer 20 are in a loop shape. It can be said that the communication conditions are improved.

  An operation when the portable electronic device 10 of the present invention communicates with the reader / writer 20 will be described with reference to FIGS. As described above, in this embodiment, the electromagnetic wave reflector 2 is added in addition to the conventional structure. In this embodiment, the electromagnetic wave reflection plate 2 is composed of a single plate, and is not parallel to the surface of the loop-shaped antenna 3 but is inclined at a certain angle.

  As shown in FIG. 1, when the reader / writer 20 and the RFID 10 try to communicate with each other when the antenna coil surfaces face each other, the electromagnetic wave is first directed in the direction of the white arrow A from the coiled antenna 22 of the antenna substrate 21 of the reader / writer 20. Is sent out. When the antenna 3 receives the electromagnetic wave, a DC voltage is generated in the IC chip 12 of the RFID 10, and the RFID 10 starts operating to receive data. In this way, when the antenna coil surfaces face each other, the sensitivity is reduced by the reflection of the electromagnetic wave reflector 2 compared to the conventional structure, but the direct wave is overwhelmingly strong, so that it is almost the same as the conventional structure. Communication is possible.

  Next, as shown in FIG. 2, when the reader / writer 20 and the antenna coil surface of the portable electronic device 1 are perpendicular or nearly perpendicular to each other, the electromagnetic wave output from the coiled antenna 22 of the reader / writer 20. Is reflected by the electromagnetic wave reflection plate 2, and the reflected wave has a component perpendicular to the surface of the antenna 3 of the portable electronic device 1, and a component capable of causing an induced current to flow through the loop-shaped antenna 3. Thus, even if the antenna surfaces are close to each other, the electromagnetic waves output from each other can be received, and the reader / writer 20 and the RFID 10 in the portable electronic device 1 can communicate. In this embodiment, the angle θ of the electromagnetic wave reflection plate 2 with respect to the surface of the antenna 3 is 15 °. However, when the angle θ is 10 to 25 °, the reader / writer 20 and the RFID 10 in the portable electronic device 1 are good. Secure communication.

  The shape of the electromagnetic wave reflection plate 2 may not be a shape matched to the shape of the antenna coil due to the limitation of the exterior, and is not limited to a circle but may be a square or a triangle. Further, the size of the electromagnetic wave reflection plate 2 does not need to match the size of the loop-shaped antenna 3, and may be larger or smaller than the antenna coil surface. However, it is desirable that the size is smaller than the outer peripheral portion of the antenna 3 in consideration of housing in the case body 6 of the same size and the influence of eddy current.

  Further, the material of the electromagnetic wave reflection plate 2 must be a material that reflects electromagnetic waves. Among them, a metal plate is general and inexpensive, but it is possible to substitute a material in which metal particles are mixed in a resin. In addition, a product in which metal particles are mixed in a resin increases the degree of freedom of shape, so that it can be easily applied to cases of various shapes. In the present embodiment, the case body 6 is integrated with the case body 6 of the portable electronic device 1. However, the case body 6 is separated into an exterior case and a back cover, and the electromagnetic wave reflection plate 2 is formed as an exterior case or An integral structure with the back cover or the like may be adopted. The inner side of the back cover may be cut obliquely and a metal plate may be attached thereto, or the inner side of the metal back cover or outer case may be cut obliquely, and the inclined portion may be used as a reflector.

  The dial 5 is preferably made of a non-conductive material. However, if the distance between the dial 5 and the antenna 3 is set to some extent, communication is possible even with a metal member.

  As described above, the electromagnetic wave reflector 2 is placed in the portable electronic device 1, the direction of the electromagnetic wave from the reader / writer 20 is changed, and the restriction on the position condition of both antenna surfaces is relaxed, thereby making the user an unreasonable posture. Communication is possible without being forced.

  In the case where the portable electronic device 1 is a wristwatch-type portable electronic device 1 as in this embodiment, the electromagnetic wave reflector 2 and the antenna 3 surface are arranged at 10 o'clock to 12 o'clock or 12 o'clock to 2 o'clock. It is good to arrange so that the distance of is the most separated.

Generally, in the case of a wristwatch-type portable electronic device 1, the 12 o'clock direction faces the outside of the body, and the electromagnetic wave reflection plate 2 is tilted so that the 12 o'clock side is farthest away, thereby picking up the electromagnetic waves outside the body. As a result, data can be sent and received without using an unnatural body. In this manner, even in the wristwatch-type portable electronic device 1, as shown in the diagram of the positional relationship among the store clerk 34, the POS terminal 31, the reader / writer 32, and the user 33 in the general store shown in FIG. Even if the antenna coil surface 36 of the writer 32 has a shape that is easy to place a card designed for a card, the reader / writer 32 can be placed in an easy posture such that the dial 5 of the portable electronic device 1 stands upright. Communication is possible.

  FIG. 3 is a cross-sectional view of the portable electronic device and the reader / writer showing the second embodiment of the present invention, and is a cross-sectional view when the portable electronic device 1A is placed perpendicular to the reader / writer 20. . In addition, the same number is attached | subjected to the same component and description is abbreviate | omitted.

  In FIG. 3, the electromagnetic wave reflection plate 14 has an area smaller than the inner diameter of the loop-shaped antenna 3 and a bent portion 14a is formed in the vicinity of the center of the electromagnetic wave reflection plate 14 so as to form a surface having an angle with the antenna 3 surface. There is one place. In this embodiment, the electromagnetic wave reflection plate 14 has a shape having the bent portion 14a. However, the electromagnetic wave reflection plate 14 may be bent in a concave shape toward the RFID 10, and a plurality of bent portions are provided instead of one. The shape may be close to a curved surface. In this way, even when the surface of the antenna 22 of the reader / writer 20 and the surface of the antenna 3 of the RFID 10 are nearly perpendicular, the electromagnetic waves radiated from the reader / writer 20 can be picked up and collected on the surface of the loop antenna 3. . Further, even if the material of the electromagnetic wave reflection plate 14 is a metal, by making the electromagnetic wave reflection plate 14 smaller than the inner diameter of the loop-shaped antenna 3, the amount of cancellation of electromagnetic waves due to eddy currents generated therein is reduced. Can be reduced.

  FIG. 4 is a cross-sectional view of a portable electronic device and a reader / writer showing a third embodiment of the present invention. FIG. 4 (a) shows the portable electronic device 1B placed perpendicular to the reader / writer 20. FIG. 4B is a plan view of the back cover 17 of the portable electronic device 1B. In addition, the same number is attached | subjected to the same component and description is abbreviate | omitted.

  In FIG. 4, the exterior case of the portable electronic device 1 </ b> B includes a case body 16 having an opening and a back cover 17 that closes the opening. The back cover 17 has a reflective surface 18 having an angle with the surface to be joined to the case body 16 on the surface on the case body 16 side. Since the reflection surface 18 formed on the back cover 17 can exert the same action as the electromagnetic wave reflection plate 2 shown in FIGS. 1 and 2, even if the antenna coil surfaces are close to each other, The output electromagnetic wave can be received, and the reader / writer 20 and the RFID 10 in the portable electronic device 1 can communicate with each other.

  In the present embodiment, the shape of the reflection surface 18 is circular as shown in FIG. 4B, but the shape may be a polygon such as a quadrangle or a pentagon in accordance with the internal structure. In the present embodiment, the reflective surface 18 is a surface formed at a single angle with respect to the outer surface of the back cover 17, but the reflective surface 18 may be formed as a curved surface or in a plurality of directions. You may comprise by the combination of the surface which has.

  Further, when the back cover 17 is made of a material such as metal or resin mixed with metal particles, the reflecting surface 18 reflects electromagnetic waves from the reader / writer 20, and therefore a separate reflector is used. There is no need, and cost can be reduced. Further, in this case, if there is a positioning guide for determining the orientation of the back cover, the orientation of the reflecting surface 18 can be made constant with respect to the case body 16, and manufacturing and repair are facilitated. When the back cover 17 is made of an insulating material, the electromagnetic wave reflection plate 2 is attached to the reflection surface 18 so that no component for positioning the reflection plate is required in the case body 16, and the orientation and angle of the reflection plate Can be easily fixed.

FIG. 8 is a cross-sectional view of a portable electronic device and a reader / writer showing a fourth embodiment of the present invention, and FIG. 8 (a) shows the antenna of the portable electronic device placed perpendicular to the antenna of the reader / writer. 8B is a plan view of the portable electronic device in the direction of arrow BB in FIG. 8A, and FIG. 8C is a side view in the direction of arrow CC in FIG. 8B. It is a side view of the portable electronic device which shows the state which removed the case body. In addition, the same number is attached | subjected to the same component and description is abbreviate | omitted.

  In FIG. 8A, the portable electronic device 1 </ b> C includes an RFID 10, a hand movement module 4, a dial plate 5, a case body 6, and an electromagnetic induction plate 7. 1 and 2 is an electromagnetic induction plate 7. The electromagnetic induction plate 7 is made of a conductive material and is disposed at an angle with the opening surface of the antenna 3 (90 degrees in this embodiment). The electromagnetic induction plate 7 has a donut shape formed by bending or pressing from a single plate, and the electromagnetic induction plate 7 is electrically insulated from the antenna 3 on the RFID 10 in an electromagnetic state. A part of the guide plate 7 is accommodated in a space between the case body 6 and the hand movement module 4 along a conductor constituting the antenna 3.

  In FIG. 8A, an induced current flows through the electromagnetic induction plate 7 due to a change in magnetic flux in the Y-axis direction emitted from the antenna 22 of the reader / writer 20. This induced current is generated in a direction that cancels the magnetic flux change from the antenna 22 of the reader / writer 20. As a result, the magnetic flux change in the Y-axis direction is canceled, but the magnetic flux generated by the induced current flowing in the electromagnetic induction plate 7 is Since the electromagnetic induction plates 7a and 7b are generated so as to surround the electromagnetic induction plates 7a and 7b, the magnetic flux in the X-axis direction is not canceled out, and therefore an induced current can be supplied to the antenna 3 of the RFID 10. In this way, the reader / writer 20 and the RFID 10 in the portable electronic device 1C can communicate with each other even when the antenna surfaces are close to each other.

  The shape of the electromagnetic induction plate 7 may be a shape in which a single plate is simply removed as shown in FIG. 10A, or a single plate as shown in FIG. 10B. Even in the case of FIG. 10B, the induced current due to the change of the magnetic field flows on the loop in the plane, but the path is expanded by the area of the plate, so that the effect is reduced as compared with FIG. On the other hand, if a method of connecting the both ends of the terminals in a three-dimensional manner by pulling out the spiral as shown in FIG. 10C, the induced current generated in the antenna 3 of the RFID 10 can be increased. In this embodiment, the electromagnetic induction plate 7 has a rectangular shape, but may take other polygonal shapes such as a triangle or a hexagon, or a circular shape according to the shape of the outer case.

  Further, as shown in FIG. 8B, in this embodiment, the electromagnetic induction plate 7 is on the entire wiring as a conductor constituting the antenna 3 of the RFID 10. May not be the entire wiring width but only one wiring. In this embodiment, the electromagnetic induction plate 7 rides on the RFID 10. However, the electromagnetic induction plate 7 may be sandwiched in the gap between the RFID 10 and the case body 6 and placed on the side surface of the RFID 10, or in the hollow portion of the electromagnetic induction plate 7. The upper and lower sides of the electromagnetic induction plate 7 may be on opposite sides of the RFID 10 so that the RFID 10 is sandwiched. Further, in the present embodiment, the case body 6 and the electromagnetic induction plate 7 are separated from each other. However, a structure may be adopted in which the case body 6 is embedded in the case body 6 in order to save space.

  FIG. 9 is a plan view of a portable electronic device showing a fifth embodiment of the present invention. The positional relationship among the exterior case 6, the RFID 10, the RFID antenna 3, and the electromagnetic induction plate 7 is included in the portable electronic device 1. It is a figure which shows an example. In addition, the same number is attached | subjected to the same component and description is abbreviate | omitted.

  The portable electronic device 1 </ b> D in FIGS. 9A and 9B is disposed above the RFID 10 and the antenna 3. The portable electronic device 1D is composed of a plurality of electromagnetic induction plates 7 and extends the antenna directivity by arranging a plurality of electromagnetic induction plates 7 insulated from each other. That is, by combining a plurality of electromagnetic induction plates 7, it is possible to cope with electromagnetic waves from the direction in which each electromagnetic induction plate 7 faces.

As a method of placing the plurality of electromagnetic induction plates 7, they may be alternately stacked on a concentric circle as shown in FIG. 9 (a), or may be slightly twisted as shown in FIG. 9 (b). Also good. In this embodiment, since the antenna 3 is circular, it is overlapped in a circular shape. However, other shapes such as a square and a hexagon may be used according to the antenna shape. In the present embodiment, the half circumference is surrounded by the electromagnetic induction plate 7, but the surrounding angle may be 360 degrees or 90 degrees depending on the purpose and application to be used. Thus, by arranging the electromagnetic induction plates in an overlapping manner, the direction in which the reader / writer 20 and the RFID 10 in the portable electronic device 1D can communicate with each other even when the antenna surfaces are close to each other in a vertical relationship is expanded.

It is sectional drawing of the portable electronic device and reader / writer which show 1st embodiment of this invention, and is sectional drawing when a portable electronic device is placed in parallel with respect to the reader / writer. It is sectional drawing of the portable electronic device and reader / writer which show 1st embodiment of this invention, and is sectional drawing when a portable electronic device is set | placed perpendicularly with respect to the reader / writer. It is sectional drawing of the portable electronic device and reader / writer which show 2nd embodiment of this invention, and is sectional drawing when a portable electronic device is set | placed perpendicularly with respect to the reader / writer. FIG. 6 is a cross-sectional view of a portable electronic device and a reader / writer showing a third embodiment of the present invention, where (a) is a cross-sectional view when the portable electronic device is placed perpendicular to the reader / writer, and (b). FIG. 3 is a plan view of a back cover of a portable electronic device. It is a top view which shows the Example of the reflecting plate of FIG. 1, FIG. It is a top view of RFID of FIG. 1, FIG. FIG. 3 is an RFID system block diagram showing the relationship between the RFID of FIG. 1 and FIG. 2 and a reader / writer. Sectional drawing of portable electronic device and reader / writer showing a fourth embodiment of the present invention, (a) is a sectional view when the portable electronic device is placed perpendicular to the reader / writer, (b) (A) is a top view of the portable electronic device in the arrow BB of (a), (c) is a side view of the arrow CC in (b). It is a top view of the portable electronic device which shows the 5th Embodiment of this invention. It is a figure which shows the Example of the electromagnetic induction board of FIG. 8, FIG. It is a figure of the positional relationship of the user and reader / writer in a general store. It is sectional drawing of the conventional portable electronic device and a reader / writer, and is sectional drawing when a portable electronic device is put perpendicularly | vertically with respect to the reader / writer. It is sectional drawing of the conventional portable electronic device and a reader / writer, and is sectional drawing when a portable electronic device is put perpendicularly | vertically with respect to the reader / writer.

Explanation of symbols

1, 1A, 1B, 1C, 1D Portable information device 2 Electromagnetic wave reflector
3 Loop-shaped antenna 4 Clock movement 5 Dial 6 Case body 7 Electromagnetic induction plate 9 Circuit board 10 RFID
11 Capacitor for antenna tuning 12 IC chip 12a Power generation unit 12b CPU
12c Communication control unit 12d Memory 13 Antenna 14a Bending unit 20 Reader / writer 21 Antenna substrate 22 Antenna pattern 24 Power supply circuit 25 Communication control unit 26 CPU
27 External interface section 31 POS register 32 Reader / writer 33 User 34 Clerk 35 Counter 36 Reader / writer antenna coil surface

Claims (5)

Non-contact communication unit including an antenna and transmission / reception means for performing non-contact data communication, a case body that accommodates the non-contact communication unit, and an electromagnetic wave reflection disposed at an angle with the antenna surface inside the case body A board,
The case body has an opening, further includes a back cover that closes the opening, and the electromagnetic wave reflection plate is integrally provided on the case body side of the back cover. A portable electronic device with functions.   The portable electronic device having a non-contact data communication function according to claim 1, further comprising positioning guide means for determining the orientation of the back cover with respect to the case body. The portable electronic device having a non-contact data communication function according to claim 1 , wherein the electromagnetic wave reflection plate is formed by processing the back cover . Non-contact communication unit including an antenna and transmission / reception means for performing non-contact data communication, a case body that accommodates the non-contact communication unit, and electromagnetic induction arranged at an angle with the antenna surface inside the case body A portable electronic device having a contactless data communication function , comprising a plate, wherein a portion of the electromagnetic induction plate is disposed along a conductor constituting the antenna . 5. A plurality of the electromagnetic induction plates insulated from each other are arranged so as to surround a non-contact communication unit including an antenna and a transmission / reception means for performing non-contact data communication. The portable electronic device provided with the non-contact data communication function of description .

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