JP2006191194A - Collective electric cable, coil antenna, ic card, and mobile radio set - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a collective electrical cable, a coil antenna, an IC antenna, and a portable radio set which are applicable to various shapes and sizes without requiring a long manufacturing time and manufacturing cost. <P>SOLUTION: The collective electric cable 1 of the present invention is constituted by putting together three insulating electric cables 2 each formed by providing a conductor 3 with an insulating coating 4, the three insulating electric conductors 2 which are put together are looped by connecting different conductors 3 at both end portions, and the connected conductors 3 are electrically conducted to one another. Consequently, the coil antenna 11 is constituted. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a collective wire, a coil antenna, an IC card including the same, and a portable wireless device used when performing communication by electromagnetic induction, for example.

An RFID (Radio Frequency Identification) coil antenna used for an IC (Integrated Circuit) card or the like has a communication method of electromagnetic induction, and its use frequency region is generally 13.56 MHz. And in this coil antenna, the communication in the said frequency domain is enabled by making it coil shape of about 5 turns.
As this coil antenna, in order to be incorporated into a card, for example, a circuit in which a circuit is formed by printing, etching, metal foil sticky notes, or the like is generally used.
In addition, as the coil antenna, one configured by winding a conductive wire in a coil shape a plurality of times and sticking it on a substrate is also known (see, for example, Patent Document 1).

  In recent years, coil antennas have been incorporated into portable radios as well as IC cards, and with this portable radios, electronic money can be settled, keys such as doors can be locked and unlocked, and various tickets can be issued and purchased. A portable wireless device is used as a member's card.

JP 2003-249815 A

  By the way, in the case of an antenna in which a circuit is formed by printing, etching, metal foil sticky notes, etc., the conductor cross section is a quadrangle and the thickness can be reduced, but in order to reduce the resistance value of the conductor, The cross-sectional area must be increased by increasing the width dimension, resulting in a large space in plan view. For this reason, the conventional coil antenna as described above has a limit to miniaturization of the card, and it is difficult to apply to a portable radio device that can secure only a narrow storage space due to the miniaturization.

  In addition, when forming circuits with printing, etching, metal sticky notes, etc., a mold is required, so devices such as portable radios that have various shapes and sizes and are frequently redesigned. In order to be applied to the antenna, the mold had to be remade every time the shape or size of the antenna was changed. For this reason, a great amount of time and cost are required for producing the mold.

  Also, in the case of an antenna as described in Patent Document 1 in which a conducting wire is wound in a coil shape a plurality of times and attached onto a substrate, the shape and size of the antenna are matched when the conducting wire is attached to the substrate. A special jig for maintaining the winding state of the conductor must be used. Therefore, in the same way as other coil antennas, it has various shapes and sizes, and in order to be applied to devices such as portable radios that are frequently redesigned, according to changes in the shape and size of the antennas. The jig had to be remade, and it took a lot of time and money to make the jig.

  An object of the present invention is to provide a collective electric wire, a coil antenna, an IC antenna, and a portable wireless device that can be applied to various shapes and sizes without requiring a great amount of production time and production cost.

  The collective wire of the present invention that can solve the above-mentioned problems is a collective wire in which a plurality of insulated wires obtained by applying an insulation coating to a conductor are assembled, and the gathered insulated wires are connected to each other at both ends. The different conductors are connected to form an annular shape, and the connected conductors form a series of electrical continuity.

  Moreover, in the assembled wire of the present invention, it is preferable that the insulated wires are assembled by twisting together.

  Moreover, the collective wire of this invention WHEREIN: It is preferable that the said conductors are connected to a board | substrate and are electrically connected.

  Further, in the collective electric wire of the present invention, the conductor may be a stranded wire conductor.

  In the aggregated electric wire of the present invention, it is preferable that the outer peripheral side of the aggregated insulated wires is covered with a jacket.

  Moreover, in the aggregated electric wire of the present invention, it is preferable that a tape is wound around the outer peripheral side of the aggregated insulated wires.

  Moreover, the coil antenna of the present invention that can solve the above-mentioned problems is a coil antenna that performs communication by electromagnetic induction, and is characterized by using the above-described collective wire.

  The IC card of the present invention is characterized in that the coil antenna of the present invention is attached to a sheet-like substrate.

  Moreover, the portable wireless device of the present invention is characterized in that the coil antenna of the present invention is housed in a housing.

  ADVANTAGE OF THE INVENTION According to this invention, the width dimension in planar view can be made small, maintaining conductor resistance moderately, The occupation area in the base material, apparatus, etc. to mount can be suppressed as much as possible, and space can be utilized effectively. In addition, it can be easily bent or curved according to various shapes and sizes without using dedicated molds or jigs, and can be placed on a substrate or housing, greatly increasing production time and costs. Can be reduced.

  Hereinafter, exemplary embodiments of a collective wire, a coil antenna, an IC antenna, and a portable wireless device according to the present invention will be described with reference to the drawings.

(Aggregate wire, coil antenna configuration)
FIG. 1 is a plan view showing a collective wire according to the present embodiment, and FIG. 2 is a cross-sectional view showing a cross-sectional shape of the collective wire.
As shown in FIGS. 1 and 2, the collective wire 1 is composed of three insulated wires 2. These insulated wires 2 have a structure in which, for example, a conductor 3 having a circular cross section made of a tinned annealed copper wire having a conductor diameter of about 0.18 mm is covered with an insulating coating 4.

The insulating coating 4 covering the conductor 3 is colored in different colors for each conductor 3.
And these insulated wires 2 are twisted and gathered together in a spiral shape, and the outer peripheral side thereof is covered with a jacket 5 so that the three insulated wires 2 are integrated. The outer diameter of the collecting wire 1 is about 0.7 mm in diameter, for example. Instead of providing the jacket 5, a resin tape may be wound around the outer peripheral side of the assembled insulated wires 2 to integrate the insulated wires 2.

The collective electric wire 1 is connected to the substrate 6 at both ends so that the three insulated electric wires 2 integrated into one ring form one ring. And the collective electric wire 1 comprised by the gathered three insulated electric wires 2 is cyclic | annular as a whole also including the board | substrate 6. As shown in FIG.
A wiring pattern 7 is formed on the surface of the substrate 6, and the conductor 3 of the insulated wire 2 is soldered and connected to the wiring pattern 7.
The wiring pattern 7 includes a connection terminal portion 8a at one end, an external connection pattern 7a having an external terminal portion 8b at the other end, and a conduction pattern 7b having connection terminal portions 8a at both ends.

The first insulated wire 2 is connected to the connection terminal portion 8a of the external connection pattern 7a and the connection terminal portion 8a on one end side of the conduction pattern 7b, and the second is the other end of the conduction pattern 7b. Side connection terminal portion 8a and the other connection pattern portion 8b are connected to the connection terminal portion 8a on one end side, and the third is the connection terminal portion 8a on the other end side of the conduction pattern 7b and other external connection pattern 7a. Are connected to the connection terminal portion 8a.
As a result, the assembled three insulated wires 2 are connected with different conductors 3 at both ends thereof, so that the connected conductors 3 form a series of electrical continuity, and substantially three turns. It is in the form of a coil wound around.
In addition, the wiring work of this insulated wire 2 can be easily performed by discriminating the color of the insulation coating 4.

  Then, by connecting the collective wires 1 as described above, the coil antenna 11 is configured, and the matching circuit connected to the connection terminal portion 8a of each external connection pattern 7a of the substrate 6 is adapted to the signal transmitted. Radiates a magnetic field.

  As described above, according to the collective wire 1 and the coil antenna 11, a plurality of insulated wires 2 each formed by applying the insulation coating 4 to the conductors 3 are assembled, and the plurality of conductors 3 are arranged in a loop form as a series of electric wires. Since the both ends of the insulated wire 2 are connected so as to achieve electrical continuity, the width dimension in a plan view can be reduced while ensuring a conductor cross-sectional area and keeping the conductor resistance moderate. As a result, it is possible to effectively use the space while minimizing the occupied area of the base material or equipment to be mounted. In particular, it can be easily accommodated in a device such as a portable wireless device that can ensure only a narrow space for miniaturization.

  In addition, it can be easily bent or curved according to various shapes and sizes without using dedicated molds or jigs, so it can be placed on the substrate, etc. It is possible to flexibly cope with the change of the storage shape, and the production time and production cost can be greatly reduced. In addition, by changing the diameter and length of the conductor 3, the thickness of the insulating coating 4, and the like, it is easy to change the design according to the substrate or equipment to be mounted.

  Moreover, since the insulated wires 2 are twisted together and the outer peripheral side thereof is covered and integrated with the jacket 5, the difference in the bending radius of each insulated wire 2 can be reduced when it is installed on a substrate or equipment to be mounted. It does not occur and the insulated wire 2 does not come apart, and good workability can be maintained.

  In addition, as the conductor 3 which comprises the assembly electric wire 1, a twisted conductor may be sufficient. By using a stranded conductor as the conductor 3, mechanical properties such as flexibility can be improved, and reliability and handleability can be improved without problems such as disconnection.

  Moreover, the number of the conductors 3 which comprise the aggregated electric wire 1 is not limited to three, What is necessary is just to increase / decrease according to the function of the apparatus etc. to be applied, and the performance requested | required. Moreover, in the said embodiment, although a series of electrical continuity is made | formed by all the conductors among the several conductors contained in the collection electric wire 1, in this invention, among the several conductors contained in the collection electric wire 1 A series of electrical continuity may be achieved by at least two or more conductors without depending on all the conductors. That is, a conductor deviating from a series of electrical continuity, for example, a conductor that does not contribute to the use as a coil antenna may be included in the collective wire 1.

(IC card form)
Next, an IC card using the coil antenna 11 composed of the collective wire 1 is described.
FIG. 3 is a plan view showing the structure of the IC card.
As shown in FIG. 3, the IC card 21 is bonded and fixed to a sheet-like base material 22 made of, for example, paper or resin. The IC card 21 has an IC chip 23 attached on a base material 22 and is wired to the substrate 6 of the coil antenna 11.

In the IC card 21, a resonance circuit is formed by the IC chip 23 and the coil antenna 11, and communication with a reader / writer (not shown) can be performed via the coil antenna 11.
In the IC card 21, the coil antenna 11 can be attached to the base material 22 by bonding the collective electric wires 1 constituting the coil antenna 11 while being bent along the outer shape of the base material 22.

  Moreover, according to this IC card 21, since the coil antenna 11 having the collective electric wire 1 in which the width dimension in plan view is suppressed is attached to the base material 22 and mounted, the arrangement area on the base material 22 is suppressed as much as possible. The card can be miniaturized.

(Type of portable radio)
Next, a portable wireless device including the coil antenna 11 made of the collective wire 1 will be described.
FIG. 4 is a schematic plan view of a portable radio having a coil antenna.
As shown in FIG. 4, the portable wireless device 31 in the present embodiment includes a first casing 32 having an operation unit and the like, and a second casing 33 having a display unit and the like, and these first casings 32. And the 3rd housing | casing 33 is mutually connected by the hinge part 34 so that rotation is possible, and it can open and close.

In the portable wireless device 31, the coil antenna 11 is disposed in the first housing 32.
The first housing 32 has a plurality of locking portions 36 composed of a pair of claw portions 35. And the collective electric wire 1 of the coil antenna 11 is latched by this latching | locking part 36 by pushing between nail | claw parts 35. Thus, the coil antenna 11 is disposed in the first casing 32 while being bent along its outer shape. As described above, in the coil antenna 11 disposed in the first housing 32, the substrate 6 is wired to the circuit substrate 37 accommodated in the first housing 32 to form a resonance circuit. Thereby, the portable wireless device 31 can communicate with the reader / writer (not shown) via the coil antenna 11.

  According to the portable radio device 31, since the coil antenna 11 having the collective electric wire 1 that can be easily deformed with a reduced width in a plan view is used, the coil antenna 11 is used as the first casing. The portable wireless device 31 can be reduced in size by being deformed and housed in a narrow space in 32. Even if the design of the portable wireless device 31 is changed and the shape in which the coil antenna 11 is disposed is changed, the coil antenna 11 can be freely deformed and stored in the housing.

  In the above embodiment, the foldable portable wireless device 31 including the first housing 32 and the second housing 33 has been described as an example. However, as a portable wireless device to which the coil antenna 11 can be applied, a foldable portable wireless device 31 is used. Not limited to formulas.

It is a top view which shows the assembly electric wire which concerns on this embodiment. It is sectional drawing which shows the cross-sectional shape of an assembled wire. It is a top view which shows the structure of an IC card. It is a schematic plan view of the portable radio provided with a coil antenna.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Collecting wire 2 Insulated wire 3 Conductor 4 Insulation coating 5 Outer coat 6 Substrate 11 Coil antenna 21 IC card 31 Portable radio device 32 First housing (housing)

Claims (9)

A collective electric wire in which a plurality of insulated wires obtained by applying an insulation coating to a conductor are assembled,
The assembled insulated wires are annularly formed by connecting the different conductors at both ends,
An assembled electric wire characterized in that the connected conductors form a series of electrical continuity. The assembled wire according to claim 1,
An insulated wire, wherein the insulated wires are gathered together by twisting together. The assembled wire according to claim 1 or 2,
An assembled electric wire, wherein the conductors are connected to a substrate and electrically connected. The assembled wire according to any one of claims 1 to 3,
The collective electric wire, wherein the conductor is a stranded wire conductor. The assembled electric wire according to any one of claims 1 to 4,
An assembled electric wire, wherein an outer peripheral side of the assembled insulated wires is covered with a jacket. The assembled electric wire according to any one of claims 1 to 4,
An assembled electric wire, wherein a tape is wound around an outer peripheral side of the assembled insulated wires. A coil antenna that performs electromagnetic induction communication,
A coil antenna using the collective wire according to any one of claims 1 to 6.   An IC card, wherein the coil antenna according to claim 7 is attached to a sheet-like base material.   A portable wireless device, wherein the coil antenna according to claim 7 is housed in a housing.

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