JP2007124557A - Component with tagged antenna, and portable radio device with rfid function which is equipped with component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a component with a tagged antenna which component can restrain the influence of metal material contained in the component and can easily incorporable into an existing portable radio device, and provide a portable radio device with RFID function which radio device is equipped with the component. <P>SOLUTION: The tagged antenna 12a is not separately arranged on the component. A frame shaped or belt shaped magnetic material 14 which surrounds an external surface of a component body is arranged on a component such as a battery 11, a primary indicator 5, a secondary indicator 6, a speaker 9a, a microphone 9b and a lens portion 11 of a digital camera, which are main components of the portable radio device. The tagged antenna 12a in which a wire is wound into a helical pattern is arranged on an external surface of the magnetic material 14. By the above means, not only the influence of metal material contained in the component can be restrained but also the space can be utilized effectively, and the tagged antenna 12a can be easily mounted irrespective of internal structure of the portable radio device. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a component of a portable wireless device, and more particularly to a component including an antenna for an RFID (Radio Frequency Identification) tag that performs data communication with a reader or a reader / writer, and a portable wireless device with an RFID function including the component.

  In recent years, RFID systems that perform data communication between a tag including an IC chip and a reader or reader / writer (hereinafter collectively referred to as a reader / writer) have become widespread. Since this RFID system performs data communication using an antenna provided in each of the tag and the reader / writer, communication is possible even if the tag is separated from the reader / writer by several centimeters to several tens of centimeters. Because of its strength in being strong, etc., it has come to be used in various fields such as factory production management, logistics management, and entrance / exit management.

  In the past, this RFID system has been used as a single system. However, in recent years, a structure has been proposed in which an RFID system is incorporated into an existing device and an RFID function is added to the device. Portable wireless devices incorporating tags have also been put into practical use (for example, Patent Document 1 below).

JP 2003-37861 A (page 3-4, FIG. 1)

  In conventional portable radio devices with an RFID function, a sheet-like tag antenna in which a conductive wire is wound in a spiral shape on a base material such as a plastic film is incorporated into the inner surface of a casing or the inner surface of a battery cover, or around a magnetic core. A rod-shaped tag antenna in which a conducting wire is wound in a spiral shape is incorporated between various components. Inside the casing in which the tag antenna is incorporated, various components including a metal material such as a circuit board are disposed. Therefore, the magnetic flux generated in the tag antenna enters the component, and an eddy current that cancels the magnetic flux flows in the metal material. As a result, there arises a problem that the communication distance of the tag antenna is reduced.

  Therefore, it is necessary to install the tag antenna in a place where it is difficult to be affected by the metal material. However, since various parts are mounted in a complicated manner in the portable wireless device, the tag antenna of the above form suppresses the influence of the metal material. There was a problem that it was difficult.

  In addition, in a conventional portable radio device with an RFID function, a tag antenna is arranged separately from the components constituting the portable radio device, so a space for arranging the tag antenna must be secured, Depending on the internal structure of the portable wireless device, there is a case where an appropriate place for arranging the tag antenna cannot be found, or in order to secure a space for arranging the tag antenna, the mounting structure of various parts must be changed. .

  The present invention has been made in view of the above-described problems, and its main purpose is to suppress the influence of metal materials contained in parts and to be easily incorporated into existing portable wireless devices. It is to provide a mounting structure of a tag antenna that can be used.

  In order to achieve the above object, a tag antenna-equipped component of the present invention includes a component main body, a frame-shaped or belt-shaped magnetic material that wraps around the outer surface of the component main body, and a tag that spirally winds the outer surface of the magnetic material. And at least an antenna.

  In this invention, it can be set as the structure provided with a electrically conductive material in at least one part between the said component main body and the said magnetic material.

  In the present invention, the component can be any of a battery, a display unit, a camera lens unit, a speaker, or a microphone.

  According to another aspect of the present invention, there is provided a portable wireless device with an RFID function including a tag that performs data communication with a reader or a reader / writer using electromagnetic induction or electromagnetic coupling, and the component with a tag antenna according to any one of the above Is incorporated.

  Thus, the component of the present invention is composed of a component main body, a frame-like or belt-like magnetic material that wraps around the outer surface of the component main body, and a tag antenna that spirally winds the outer surface of the magnetic material. Even if the component contains a metal material, the magnetic flux generated by the tag antenna mainly passes through the magnetic material disposed between the component main body and the tag antenna. The influence of the metal material can be suppressed. In the present invention, since the tag antenna and the existing parts are integrated, it is not necessary to newly provide a space for installing the tag antenna, and can be easily incorporated into an existing portable wireless device.

  According to the component with the tag antenna of the present invention and the portable wireless device with the RFID function including the component, the following effects can be obtained.

  The first effect of the present invention is that the influence of the metal material contained in the component can be suppressed. The reason for this is that a frame-shaped or belt-shaped magnetic material that wraps around the outer surface of the component main body and a tag antenna that spirals the outer surface of the magnetic material are arranged on the components that make up the portable wireless device. This is because the magnetic flux generated by the antenna mainly passes through the inside of the magnetic material disposed between the component main body and the tag antenna, so that the penetration of the magnetic flux into the component main body can be suppressed.

  The second effect of the present invention is that the tag antenna can be easily incorporated into an existing portable wireless device. The reason is that the tag antenna is not arranged separately from the component, but is integrated with the component, so there is no need to provide a new space for installing the tag antenna, and the internal structure of the portable radio device This is because a tag antenna can be mounted regardless.

  As shown in the prior art, in portable radio devices equipped with an RFID function, sheet-like tag antennas are arranged on the inner surface of the casing and the inner surface of the battery cover, and rod-shaped tag antennas are arranged between components. However, since parts containing metal materials are intricately mounted inside the portable wireless device, the magnetic flux generated by the tag antenna can easily enter the part, reducing the inductance of the tag antenna and increasing the communication distance. There was a problem of being lowered. In addition, in order to dispose the tag antenna separately from the parts, it is necessary to provide a new space, and there is a problem that it cannot be easily incorporated into an existing portable wireless device.

  On the other hand, parts of various shapes are incorporated in the portable wireless device, and these parts are provided with a certain space around them for the convenience of mounting.

  Therefore, in the present invention, the tag antenna is not disposed separately from the component, but is added to the battery, the display unit, the speaker, the microphone, the lens unit of the digital camera, etc., which are the main components of the portable wireless device. Integrate with. At that time, since the communication performance of the tag antenna may be deteriorated when the component contains a metal material, a frame-like or belt-like magnetic material that circulates around the outer surface of the component is disposed, and the magnetic material A tag antenna in which a conductive wire is spirally wound is disposed on the outer surface. Thereby, while being able to suppress the influence of the metal material contained in components, space can be used effectively and it can be easily incorporated into an existing portable radio regardless of the internal structure.

  In order to describe the above-described embodiment in more detail, a component with a tag antenna and a portable wireless device with an RFID function including the component according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing an external configuration of the front and back surfaces of a portable wireless device with an RFID function according to the present embodiment, and FIG. 2 is a block diagram showing a configuration of an RFID system. FIG. 3 is a diagram schematically showing the structure of a battery with a tag antenna incorporated in a portable wireless device with an RFID function, and FIGS. 4 to 6 are diagrams showing variations thereof. 7 is a diagram schematically showing the structure of the display unit with the tag antenna, FIG. 8 is a diagram schematically showing the structure of the lens unit with the tag antenna, and FIG. 9 is the structure of the speaker (microphone) with the tag antenna. FIG.

  As shown in FIG. 1, the portable wireless device 1 with the RFID function according to the present embodiment includes an upper housing 2, a lower housing 3, and a hinge portion that supports the upper housing 2 and the lower housing 3 so as to be opened and closed. 4 and. A first display unit 5 such as a liquid crystal display device or an organic EL (Electro Luminescence) display device, a speaker 9a for outputting sound or music, and the like are disposed on the inner surface of the upper housing 2. The second display unit 6, the digital camera function lens unit 10, and the like are arranged, and the upper case 2 is provided with a retractable whip antenna 8 and the like. Further, on the inner surface of the lower housing 3, an operation unit 7 in which buttons such as special keys and numeric keys are arranged, a microphone 9b for inputting voice, and the like are arranged. A circuit board and a battery 11 for realizing various functions of the wireless device 1 (such as functions such as voice call and mail transmission / reception, web browsing, photo shooting, music playback, etc.) are arranged. A tag antenna is integrally formed in any of the components such as the first display unit 5 and the second display unit 6, the speaker 9 a, the microphone 9 b, the lens unit 10, and the battery 11. .

  Note that FIG. 1 is an example, and an arbitrary portable radio device such as an integrated portable wireless device or a portable wireless device having a biaxial hinge structure in which an upper housing 2 and a lower housing 3 are supported to be openable and closable and rotatable. It can be applied to portable radio devices with a structure. Moreover, the shape and arrangement of each component such as the first display unit 5 and the second display unit 6, the speaker 9a, the microphone 9b, and the lens unit 10 are not particularly limited.

  Further, the basic configuration of the RFID system is as shown in FIG. 2, and the tag 12 is not necessarily required if the tag antenna 12a and the capacitor constituting the resonance circuit (the IC 12b has a capacitance), and the capacitor is omitted in this embodiment. And the IC 12b for storing ID information and the like and performing communication control. The reader / writer 13 is a reader / writer antenna 13a that communicates with the tag antenna 12a, and a communication circuit for converting transmission / reception signals. And a circuit unit such as an arithmetic processing unit 13c for decoding a transmission / reception signal.

  Here, as shown in the prior art, when a sheet-like tag antenna in which a conductive wire is wound spirally on a base material such as a plastic film is disposed on the inner surface of the lower housing 3 or the inner surface of the battery cover The magnetic flux generated in the tag antenna is absorbed by a part including a metal material such as a circuit board disposed in the lower housing 3, and a rod-shaped tag antenna in which a conductive wire is spirally wound around the magnetic core Is disposed between the components, there arises a problem that adjacent components absorb the magnetic flux generated in the tag antenna. Further, in the structure in which the tag antenna is provided separately from the components, a space for arranging the tag antenna must be provided, and it may not be easily incorporated into an existing portable wireless device. On the other hand, components of various shapes are mounted on the portable wireless device, and a certain amount of space is provided around these components for convenience of mounting.

  Therefore, in the present embodiment, the tag antenna 12a is not disposed separately from the above components, but is formed integrally with the tag antenna 12a. For example, as shown in FIG. 3A, a battery 11, a frame-like magnetic material 14 that wraps around the outer surface of the battery 11, and a tag antenna 12a that spirally winds the outer surface of the magnetic material 14 are combined. As shown in FIG. 3B, the battery 11 and the tag antenna 12a are integrated. In the case of this structure, as shown in FIG. 3C, the magnetic flux 16 generated by the tag antenna 12 a mainly passes through the inside of the magnetic material 14, and does not easily enter a part including a metal material such as the battery 11. Therefore, it is possible to suppress a decrease in inductance due to the metal material, thereby preventing a decrease in communication distance.

  3 is merely an example, and the shape and structure of the battery 11 are arbitrary. The thickness, width, shape, and the like of the magnetic material 14 can be appropriately set according to the performance required for the tag antenna 12a. . In FIG. 3, the magnetic material 14 is disposed so as to wrap around the side surface of the battery 11, but the winding direction of the magnetic material 14 is arbitrary. For example, as shown in FIG. It may be arranged. Further, the magnetic material 14 and the part may not be fixed, may be fixed by fitting them together, may be fixed by engaging a hook or the like, an adhesive material, an adhesive, or the like. You may fix using. Further, in FIG. 3 and FIG. 4, the frame-shaped magnetic material 14 is shown. However, for example, a flexible belt-shaped magnetic material 14 as shown in FIG. May be processed so as to go around the outer surface of the component as shown in FIG.

  Further, the diameter, the number of windings, the winding method, the interval, the fixing method, etc. of the conducting wire constituting the tag antenna 12a are not limited. The IC 12b may be fixed to a part together with the tag antenna 12a, or may be arranged away from the tag antenna 12a. In addition, the conductor may be covered with an insulating material or may not be covered with the insulating material. However, when the conductive wire is not covered with the insulating material, a predetermined insulation treatment (a portion between the magnetic material 14 and the portion where the conductive wire intersects) is performed. For example, it is preferable to interpose an insulating material. Further, in FIG. 3, the tag antenna 12a and the IC 12b are exposed, but they may be covered with a protective film or the like.

  The structure and manufacturing method of the magnetic material 14 are not particularly limited, but the amorphous foil, the laminated material of the amorphous foil, the metal powder, and the carbonyl iron can be arranged in a narrow space and have the desired performance even if it is thinned. Powder, reduced iron powder, atomized powder (pure iron, Si, Cr, Al-containing iron, Permalloy, Co-Fe, etc.), amorphous (B, P, Si-containing iron, cobalt, nickel alloy in water It is preferably formed by a granular powder such as atomized or gas atomized powder) or a composite material of a flake and an organic substance such as plastic or rubber, or a coating film of a coating material containing the powder or flake.

  Moreover, injection molding, application | coating, compression molding, rolling, etc. can be used as a method of manufacturing the said composite material. A magnetic material formed by injection molding or compression molding has a characteristic that it is hard to crack even if it is thin because it is tougher than that formed by ferrite. In the case of coating, for example, the granular powder can be flattened with an attractor, ball mill, stamp mill or the like to form flakes, and then a coating containing flakes or granular powder can be repeatedly applied / dried on the film. At that time, by applying a magnetic field during coating, the flakes can be oriented in a certain direction, and the characteristics can be improved.

  As the plastic in the composite material, a thermoplastic plastic having good processability or a thermosetting plastic having a good heat resistance can be used, and insulating acrylic, polyester, polychlorinated Resins such as vinyl, polyethylene, polystyrene, and epoxy can also be used.

  Further, in FIG. 3, only the magnetic material 14 is interposed between the tag antenna 12a and the component (battery 11). However, depending on the content of metal material in the component, the distribution and type of the metal material, etc. The characteristics may change. Therefore, in order to make the characteristics of the tag antenna 12a substantially constant regardless of the type of component, as shown in FIG. 6, a conductive material 15 is provided on at least a part between the component (battery 11) and the magnetic material 14. It can also be interposed. As the conductive material 15, a metal having a low electrical resistance, such as aluminum, copper, or a copper alloy, can be used, and the shape, width, thickness, fixing method, and the like are not particularly limited.

  The case where the magnetic material 14, the tag antenna 12a, and the conductive material 15 as necessary are arranged in the battery 11 built in the portable wireless device has been described above. However, the structure of the present invention is an arbitrary configuration that constitutes the portable wireless device. It can be applied to any part. Examples are shown below.

  For example, as shown in FIG. 7, the structure of the present invention is applied to the first display unit 5 disposed on the inner surface of the upper housing 2 and the second display unit 6 disposed on the outer surface of the upper housing 2. Can be applied. The first display unit 5 or the second display unit 6 includes, for example, a liquid crystal panel 17 composed of a pair of opposed substrates (TFT substrate and color filter substrate) and a liquid crystal material sandwiched between a pair of housings, LEDs, and the like. A light source plate, a backlight 18 made of a light guide plate for guiding the light emitted from the light source to the entire surface of the liquid crystal panel 17, and a housing 19 for fixing the liquid crystal panel 17 and the backlight 18. A frame-shaped or belt-shaped magnetic material 14 that circulates around the outer surface of the housing 19 is disposed, and a tag antenna 12 a in which a conductive wire is wound spirally is disposed on the outer surface of the magnetic material 14. Note that the structure of the first display unit 5 or the second display unit 6, the driving method of the liquid crystal, the illumination method, the arrangement of each member, and the like are arbitrary, and the same applies when using an organic EL display device.

  Further, as shown in FIG. 8, the structure of the present invention can be applied to the lens portion 10 of the digital camera function arranged on the outer surface of the upper housing 2 or the like. The lens unit 10 includes a lens 10a formed of one or a plurality of glasses or plastics, and a casing 10b that fixes the lens 10a. The casing 10b goes around the outer surface of the casing 10b. A frame-shaped or belt-shaped magnetic material 14 is disposed, and a tag antenna 12 a in which a conductive wire is spirally wound is disposed on the outer surface of the magnetic material 14.

  Further, as shown in FIG. 9, the structure of the present invention is similarly applied to the speaker 9a disposed on the inner surface of the upper housing 2 and the microphone 9b disposed on the inner surface of the lower housing 3. You can also The speaker 9a (microphone 9b) is composed of a vibration part made up of a permanent magnet and a coil, a cone that outputs vibration as sound, and a housing for fixing them. A frame-shaped or belt-shaped magnetic material 14 that circulates is disposed, and a tag antenna 12 a in which a conductive wire is spirally wound is disposed on the outer surface of the magnetic material 14. The structure of the speaker 9a (microphone 9b) is arbitrary, and a flat panel type speaker 9a (microphone 9b) may be used instead of the cone type.

  In any of the structures described above, the magnetic flux 16 generated by the tag antenna 12a mainly passes through the inside of the magnetic material 14, and the first display unit 5, the second display unit 6, the lens unit 10, the speaker 9a, and the microphone. Intrusion into parts such as 9b is suppressed.

  In any of the above-described configurations, the thickness, width, shape, winding direction, fixing method, manufacturing method of the magnetic material 14, the diameter, the number of turns, the winding method, the spacing, and the fixing method of the conductive wire constituting the tag antenna 12a. The presence or absence of coating, the arrangement of the IC 12b, etc. can be changed as appropriate. The conductive material 15 is interposed between the component and the magnetic material 14, or the surface of the tag antenna 12a or IC 12b is covered with a protective film or the like. Also good.

  Thus, in this embodiment, the tag antenna 12a is not provided separately from the components constituting the portable wireless device, but the frame-like or belt-like magnetic material 14 that circulates around the outer surface of the component main body is provided, A tag antenna 12a in which a conducting wire is spirally wound is disposed on the outer surface of the magnetic material 14, and the component, the magnetic material 14, and the tag antenna 12a are integrally formed. Thereby, since the magnetic flux 16 generated in the tag antenna 12a mainly passes through the inside of the magnetic material 14, the influence of the metal material included in each component can be suppressed, and the space between the components can be effectively used. Since the tag antenna 12a can be disposed, it can be easily incorporated into an existing portable wireless device.

  In the above embodiment, the battery 11, the first display unit 5, the second display unit 6, the lens unit 10, the speaker 9 a, and the microphone 9 b have been described as examples of the components on which the tag antenna 12 a is disposed. The invention is not limited to the above-described embodiment, and is similarly applied to other components (for example, vibrator, key of operation unit 7, whip antenna 8, circuit board, etc.) constituting the portable wireless device. Can do.

  Moreover, in the said Example, although the tag antenna 12a arrange | positioned in a portable radio | wireless machine was described, it may apply similarly to the tag antenna 12a arrange | positioned in the arbitrary apparatuses with which components are mounted with high density. It can also be applied to the reader / writer antenna 13a. In addition, the structure of the antenna according to the present embodiment is not limited to the RFID antenna, and can be applied to an arbitrary antenna disposed in a place that is easily affected by a metal material.

  The present invention can be applied not only to a mobile phone but also to an arbitrary wireless communication device having an RFID function, for example, a PHS, a transceiver, a portable terminal device having a wireless communication function, a game machine, and the like.

It is a figure which shows the external appearance structure of the front surface and back surface of the portable wireless device with an RFID function which concerns on one Example of this invention. It is a block diagram which shows the structure of an RFID system. It is a figure which shows typically the structure of the battery by which the tag antenna based on one Example of this invention was arrange | positioned. It is a figure which shows the variation of the structure of the battery by which the tag antenna based on one Example of this invention was arrange | positioned. It is a figure which shows typically the other structure of the magnetic material which concerns on one Example of this invention. It is a figure which shows the variation of the structure of the battery by which the tag antenna based on one Example of this invention was arrange | positioned. It is a figure which shows typically the structure of the display part by which the tag antenna which concerns on one Example of this invention was arrange | positioned. It is a figure which shows typically the structure of the lens part by which the tag antenna based on one Example of this invention was arrange | positioned. It is a figure which shows typically the structure of the speaker (microphone) by which the tag antenna based on one Example of this invention was arrange | positioned.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Portable radio equipment with RFID function 2 Upper housing | casing 3 Lower housing | casing 4 Hinge part 5 1st display part 6 2nd display part 7 Operation part 8 Whip antenna 9a Speaker 9b Microphone 10 Lens part 10a Lens 10b Housing | casing 11 Battery 12 Tag 12a Tag antenna 12b IC
DESCRIPTION OF SYMBOLS 13 Reader / writer 13a Reader / writer antenna 13b Communication circuit part 13c Arithmetic processing part 14 Magnetic material 15 Conductive material 16 Magnetic flux 17 Liquid crystal panel 18 Backlight 19 Case

Claims (4)

  A component with a tag antenna, comprising at least a component main body, a frame-shaped or belt-shaped magnetic material that wraps around the outer surface of the component main body, and a tag antenna that spirally winds the outer surface of the magnetic material.   The component with a tag antenna according to claim 1, wherein a conductive material is provided at least at a part between the component main body and the magnetic material.   The component with a tag antenna according to claim 1 or 2, wherein the component is any one of a battery, a display unit, a camera lens unit, a speaker, and a microphone. A portable wireless device with an RFID function including a tag that performs data communication with a reader or a reader / writer using electromagnetic induction or electromagnetic coupling,
A portable wireless device with an RFID function, wherein the component with a tag antenna according to any one of claims 1 to 3 is incorporated.

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