JP2006074348A - Coil antenna for non-contact communication apparatus and its manufacturing method - Google Patents

Coil antenna for non-contact communication apparatus and its manufacturing method Download PDF

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JP2006074348A
JP2006074348A JP2004254216A JP2004254216A JP2006074348A JP 2006074348 A JP2006074348 A JP 2006074348A JP 2004254216 A JP2004254216 A JP 2004254216A JP 2004254216 A JP2004254216 A JP 2004254216A JP 2006074348 A JP2006074348 A JP 2006074348A
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coil antenna
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half
opposing
side
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JP4186895B2 (en )
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Tatsuya Hirata
Toshio Shimizu
達也 平田
敏雄 清水
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Denso Wave Inc
株式会社デンソーウェーブ
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<P>PROBLEM TO BE SOLVED: To manufacture a coil antenna capable of obtaining magnetic field strength suitable to individual use environment. <P>SOLUTION: A half side of a prototype coil antenna 3 is rotated vertically through 180 degrees so that intermediate folding double line parts 3b and 3h stretch in straight line and then its right half side is folded to lie over the left half side. Thus, a small-sized coil antenna 4 which is half as large as the prototype coil antenna 3 and is double in strength of a generated magnetic field can be manufactured. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明はICカードなどの非接触式データキャリアと非接触で通信する非接触通信装置において、その送受信のために用いられるコイルアンテナおよびその製造方法に関する。 The non-contact communication device present invention to communicate in a non-contact data carrier and the non-contact such as an IC card, to a coil antenna and a manufacturing method thereof used for the transmission and reception.

例えば特許文献1には、宅配便の配送システムにおいて、集配した荷物の仕分け作業を自動で行うために、荷物に電子荷札(非接触データキャリア)を取り付け、質問器(非接触通信装置)によってこの電子荷札と非接触で通信して電子荷札に記憶された宛先などを読み出すようにすることが記載されている。 For example, Patent Document 1, in courier delivery system, in order to perform the task of sorting collection and delivery the package automatically, mounting an electronic tag (non-contact data carrier) to the package, this by the interrogator (non-contact communication device) it has been described that to read out and address stored in the electronic tag communicates with an electronic tag in a non-contact. このように非接触データキャリアと通信する非接触通信装置では、その通信のためにコイルアンテナを備えている。 In non-contact communication apparatus for communicating in this way the non-contact data carrier is provided with a coil antenna for the communication.
特開平4−333415号公報 JP-4-333415 discloses

従来の非接触通信装置では、コイルアンテナの形状が固定であるため、通信範囲を拡大したい場合、送信出力を大きくするか、コイルアンテナの形状が大きいアンテナに置き替える必要がある。 In the conventional non-contact communication device, since the shape of the coil antenna is fixed, if you want to expand the communication range, or to increase the transmission output, it is necessary to replace them in the shape of a coil antenna is large antenna. 或は、通信範囲を狭くしたい場合も上述したと同様で、送信出力小さくするか、コイルアンテナの形状が小さいアンテナに置き替えることが必要である。 Alternatively, may want to narrow the communication range similar to that described above, or to reduce the transmission output, it is necessary that the shape of the coil antenna replace them in a small antenna.
しかしながら、通信エリアを遠方にまで広げるために送信出力(コイルアンテナに流す電流の強さ)を強くすると、非接触通信装置の近傍の磁界が非常に強くなるため、データキャリアが近くに来たとき、データキャリアが破壊される危険性がある。 However, when strong transmission power (intensity of the current flowing through the coil antenna) to extend the communication area to a far, since the magnetic field in the vicinity of the non-contact communication device is very strong, when the data carrier comes close , there is a risk that the data carrier is destroyed. これは、コイルアンテナの大きさを一定にしたままで送信出力を増加させると、発生する磁界の強さは距離の3乗に反比例することが原因で起きる問題である。 This, increasing the transmission power the size of the coil antenna remain constant, the strength of the generated magnetic field to be a problem caused due to inverse proportion to the cube of the distance.

また、コイルアンテナの送信出力を切り換えるための切り替え回路を追加すると、送信インピーダンスのマッチングの大きなずれが発生し、その解決のために試行錯誤を繰り返さねばならず、開発期間が長くなると共に、設計の余裕度が小さくなる。 Also, adding a switching circuit for switching the transmission output of the coil antenna to generate a large displacement of the matching transmission impedance not need to be repeated trial and error for the resolution, the development period becomes long, the design of the margin is small.
今後、データキャリアの種類が多様化してゆく中で、非接触通信装置の送信出力の調整のみでは、個々の使用環境にとって最適な発生磁界を作り出すことは難しく、使用環境に応じたコイルアンテナを用いることが重要となってくる。 In the future, among other types of data carriers slide into diverse, only adjustment of the transmission output of the non-contact communication device, it is difficult to produce an optimum magnetic field generated for each use environment, using a coil antenna in accordance with the use environment it becomes important.

本発明は上記の事情に鑑みてなされたもので、その目的は、個々の使用環境に適した磁界強度を得ることができるコイルアンテナおよびその製造方法を提供することにある。 The present invention has been made in view of the above circumstances, and its object is to provide a coil antenna and a manufacturing method thereof can be obtained a magnetic field strength that is suitable for individual use environment.

請求項1の非接触通信装置用コイルアンテナは、ほぼ矩形状をなし、対向する2辺のうちの少なくとも一方の辺の中間に他方の辺に向って伸びる折り返し二重線部を形成してなるものである。 Non-contact communication device coil antenna according to claim 1 is obtained by forming a substantially rectangular shape, folded double line portion extending toward the middle to the other side of at least one side of the two opposing sides it is intended.
請求項4の非接触通信装置用コイルアンテナの製造方法は、ほぼ矩形状をなし、1組の対向する2辺のうちの少なくとも一方の辺の中間に他方の辺に向って伸びる折り返し二重線部が形成されたフレキシブルな原型コイルアンテナにおいて、当該原型コイルアンテナの片側半分を残る片側半分に対して前記折り返し二重線部が直線状となるように180度回転させ、その後、前記原型コイルアンテナの前記片側半分を前記残る片側半分に重ねるように折り返すことによって前記原型コイルアンテナより小型で該原型コイルアンテナより強い磁界強度を生成する小型コイルアンテナを形成するようにしたことを特徴とする。 Method of manufacturing a non-contact communication device coil antenna according to claim 4, substantially rectangular shape, one pair of opposing two sides folded double line extending toward the middle to the other side of at least one of the sides of the in flexible prototype coil antenna section is formed, is rotated 180 degrees as the folded double line portion becomes linear with respect to half side remaining one side half of the original coil antenna, then the prototype coil antenna by folding the halves of the so superimposed on one half remaining the is characterized in that so as to form a compact coil antenna for generating a magnetic field strength stronger than said original coil antenna compact than the original coil antenna.

請求項1のコイルアンテナは、請求項4における原型コイルアンテナに相当する。 Coil antenna of claim 1 corresponds to the original coil antenna in claim 4. そして、請求項4により製造したコイルアンテナは、請求項1のコイルアンテナの半分の大きさで、コイルの巻き数が請求項1のコイルアンテナの倍となるので、その発生磁界の強さも請求項1のコイルアンテナの倍となる。 The coil antenna manufactured by claim 4 is half the size of the coil antenna according to claim 1, since the number of turns of the coil becomes twice the coil antenna according to claim 1, claims strength of the generated magnetic field a multiple of one of the coil antenna.

また、請求項2の非接触通信装置用コイルアンテナは、ほぼ矩形状をなし、1組の対向する2辺の中間および残る1組の対向する2辺の中間に、それぞれ対向する辺に向って伸びる折り返し二重線部を形成してなるものである。 The non-contact communication device coil antenna according to claim 2, substantially a rectangular shape, a pair of opposing two sides intermediate the pair of opposing two sides of the middle and left, toward the respective opposite sides extending folded double line unit in which is formed by the formation.
請求項5の非接触通信装置用コイルアンテナの製造方法は、ほぼ矩形状をなし、1組の対向する2辺の中間および残る1組の対向する2辺の中間に、それぞれ対抗する辺に向って伸びる折り返し二重線部が形成されたフレキシブルな原型コイルアンテナにおいて、当該原型コイルアンテナの片側半分を残る片側半分に対して前記2組の対向する2辺のうちの一方の組の対向2辺の前記折り返し二重線部が直線状となるように180度回転させ、その後、前記原型コイルアンテナの前記片側半分を前記残る片側半分に重ねるように折り返すことによって中間コイルアンテナを形成し、前記中間コイルアンテナの片側半分を残る片側半分に対して前記2組の対向する2辺のうちの他方の組の対向2辺の前記折り返し二重線部が直線状となるように Method of manufacturing a non-contact communication device coil antenna according to claim 5, substantially rectangular shape, one pair of opposing two sides of the middle and left pair of opposing two sides intermediate, towards the sides against each in flexible prototype coil antenna folded doublet portion is formed extending Te, one set of opposing two sides of the two opposing sides of the two pairs against half one remaining one side half of the original coil antenna the folded double line portion rotates 180 degrees so that the linear, then the intermediate coil antenna formed by folding the halves of the original coil antenna to overlap the one half remain the said intermediate as the folded double line of the other set of opposing two sides of said two sets of opposing two sides against half one remaining one side half of the coil antenna is linear 80度回転させ、その後、前記中間コイルアンテナの前記片側半分を前記残る片側半分に重ねるように折り返すことによって前記原型コイルアンテナより小型で該原型コイルアンテナより強い磁界強度を生成する小型コイルアンテナを形成するようにしたことを特徴とする。 Rotate 80 degrees, then form a compact coil antenna for generating a magnetic field strength stronger than said original coil antenna compact than the original coil antenna by folding the halves of the intermediate coil antenna to overlap the one half remaining the characterized by being adapted to.

請求項2のコイルアンテナは、請求項5における原型コイルアンテナに相当する。 Coil antenna according to claim 2 corresponds to the original coil antenna in claim 5. そして、請求項5により製造したコイルアンテナは、請求項2のコイルアンテナの4分の1の大きさで、コイルの巻き数が請求項2のコイルアンテナの4倍となるので、その発生磁界の強さも請求項1のコイルアンテナの4倍となる。 The coil antenna manufactured by claim 5 is one of magnitude of a quarter of the coil antenna according to claim 2, since the number of turns of the coil is four times the coil antenna according to claim 2, the generated magnetic field also the strength becomes 4 times the coil antenna according to claim 1.

請求項3の非接触通信装置用コイルアンテナの製造方法は、ほぼ矩形状に形成されたフレキシブルな原型コイルアンテナを、1組の対向する二辺の偶数箇所で折り返すことにより、前記原型コイルアンテナより小型で該原型コイルアンテナと同等の磁界強度を生成する小型コイルアンテナを形成するようにしたことを特徴とする。 Method of manufacturing a non-contact communication device coil antenna according to claim 3, the flexible prototype coil antenna formed substantially in a rectangular shape, by folding an even portion of the two sides a pair of opposing, from the original coil antenna characterized in that so as to form a compact coil antenna for generating a magnetic field strength equivalent to that of the raw coil antenna small.
この請求項3の方法により製造したコイルアンテナは、原型コイルアンテナの大きさの(1/折り返し個所数)になるが、発生磁界の強さは原型コイルアンテナと同等となる。 Coil antenna manufactured by the method of the third aspect, becomes a prototype coil antenna size of (1 / folding number locations), the strength of the generated magnetic field is equal to the original coil antenna.

[第1実施例] First Embodiment
以下、本発明の第1実施例を図1により説明する。 Hereinafter, a description will be given of a first embodiment of the present invention by FIG. この実施例は請求項3に対応する。 This embodiment corresponds to claim 3.
図1(a)は原型コイルアンテナ1を示す。 Figure 1 (a) shows a prototype coil antenna 1. この原型コイルアンテナ1は、1本の銅線、またはプラスチックフィルム上にプリント配線によって矩形状に形成され、両端部は非接触通信装置に接続される接続部1a、1bとされている。 The prototype coil antenna 1 is formed in a rectangular shape one copper wire, or on a plastic film by a printed circuit, both ends connecting portion 1a which is connected to the non-contact communication device, there is a 1b. このフレキシブルな原型コイルアンテナ1から発生磁界の強さが同じで且つ小型のコイルアンテナ2を製造する。 The flexible prototype strength from the coil antenna 1 generates a magnetic field to produce a coil antenna 2 and compact the same.

原型コイルアンテナ1から小型コイルアンテナ2を製造する方法は、原型コイルアンテナ1の2組の対向2辺1c、1dおよび1e、1fのうち、例えば図1(a)において上下に対向する一方の組の2辺1c、1dを、左右に対向する他の組の2辺1e、1fの間の偶数個所、この実施例では2箇所(辺1c、1dを三等分する位置;図1(a)に一点鎖線A、Bで示す線。)で折り返す、というものである。 Preparing a compact coil antenna 2 from prototype coil antenna 1 method, two pairs of opposing two sides 1c of the prototype coil antenna 1, 1d and 1e, of the 1f, for example, one set of opposed vertically in FIGS. 1 (a) 2 sides 1c, 1d, and another set of two sides 1e facing the right and left, 1f even-point between two locations in this example of (sides 1c, 1d three equally divided positions; FIGS. 1 (a) wrap a line.) indicated by the chain line a, B one point, is that.

このようにして形成した小型コイルアンテナ2において、4辺2a〜2dのうち、図示左右の2辺2c、2dは、それぞれ1本の線(原型コイルアンテナ1の辺1e、1f)からなり、図示上下の2辺2a、2bは、それぞれ3本の線(原型コイルアンテナ1の辺1c、1dを2箇所で折り返して重ねた3本の線1c−1、1c−2、1c−3、1d−1、1d−2、1d−3)からなる。 In a small coil antenna 2 formed in this way, of the four sides 2 a to 2 d, 2 sides 2c, 2d of the illustrated left and right consists each single line (prototype coil antenna 1 side 1e, 1f), shown upper and lower two sides 2a, 2b is three lines (prototype coil antenna 1 side 1c respectively, three lines were overlaid 1d wrapping in two places 1c-1,1c-2,1c-3,1d- consisting of 1,1d-2,1d-3).

小型コイルアンテナ2を非接触通信装置に組み付けた場合、非接触通信装置からICカードやRFIDタグなどのデータキャリアへの送信時、小型コイルアンテナ2には電流が流れる。 When assembled with the small coil antenna 2 to the non-contact communication device, when transmission from the non-contact communication device to the data carrier such as an IC card or RFID tag, current flows through the small coil antenna 2. このとき、2辺2aおよび2bを構成する3本の線1c−1、1c−2、1c−3および1d−1、1d−2、1d−3に流れる電流の向きは、2本の線1c−1、1c−3および1d−1、1d−3は同じで、1本の線1c−2および1d−2は逆となるので、3本の線1c−1、1c−2、1c−3および1d−1、1d−2、1d−3を流れる電流によって発生する磁束のうち、電流の向きが互いに逆となっている2本の線の磁束は互いに相殺される。 At this time, the direction of the current flowing through the three lines 1c-1, 1c-2,1-c-3 constituting the two sides 2a and 2b and 1d-1,1d-2,1d-3 are two lines 1c -1,1C-3 and 1d-1,1d-3 is the same, because one line 1c-2 and 1d-2 is reverse, three lines 1c-1,1c-2,1c-3 and 1d-1,1d-2,1d-3 of the magnetic flux generated by the current flowing through the magnetic flux of the two lines in which the direction of the current becomes opposite to each other are offset from one another.

このため、小型コイルアンテナ2は、大きさが原型コイルアンテナ1の3分の1で、磁界強さが原型コイルアンテナ1と同じとなる。 Therefore, a small coil antenna 2, the size is in a third of the original coil antenna 1, the magnetic field strength is the same as the original coil antenna 1. 従って、原型コイルアンテナ1をそのまま非接触通信装置のコイルアンテナとして使用することにより、広い範囲(コイルアンテナのコイル線と同じ面での面積範囲)で一様な磁界を生成し、小型コイルアンテナ2では原型コイルアンテナ1と同じ強さの磁界を狭い範囲で生成することができ、一種類のコイルアンテナで、容易に2つの使用環境に対応することができる。 Thus, by using a prototype coil antenna 1 as it is as a coil antenna of the non-contact communication device, to generate a uniform magnetic field over a wide range (area range in the same plane as the coil wire of the coil antenna), a small coil antenna 2 in can generate a magnetic field as strong as the original coil antenna 1 in a narrow range, with one type of coil antenna, it is possible to easily correspond to the two environment.

[第2実施例] Second Embodiment
図2は本発明の第2実施例を示す。 Figure 2 shows a second embodiment of the present invention. この実施例は請求項1および4に対応する。 This embodiment corresponds to claims 1 and 4.
図2(a)はフレキシブルな原型コイルアンテナ3を示す。 2 (a) shows a flexible prototype coil antenna 3. この原型コイルアンテナ3は、1本の銅線によって矩形状に形成され、両端部は非接触通信装置に接続される接続部3a、3bとされている。 The prototype coil antenna 3 is formed in a rectangular shape by a single copper wire, both ends connecting portion 3a to be connected to the non-contact communication device, there is a 3b. この原型コイルアンテナ1の2組の対向2辺3c、3dおよび3e、3fのうち、図示上下に対向する2辺3c、3dの長さ方向中間には、対向する辺に向って伸びるほぼU字状の折り返し二重線部3g、3hが形成されている。 Two pairs of opposing two sides 3c of the prototype coil antenna 1, 3d and 3e, of 3f, two sides 3c facing the illustrated vertically, the longitudinal direction intermediate 3d, substantially U-extending toward the opposite sides Jo the folded double line section 3g, 3h are formed. なお、折り返し二重線部3g、3hの先端は実際には互いに接しているが、わかり易く図示したため、図では離れている。 Incidentally, folding doublet part 3g, while the tip of 3h is actually in contact with each other, because of the clarity shown apart in Figure.

この原型コイルアンテナ3から発生磁界の強さが2倍で且つ大きさが半分の小型コイルアンテナ4(図2(c)参照)を製造する。 The strength of the magnetic field generated from the original coil antenna 3 and the size twice to produce a half of the small coil antenna 4 (see FIG. 2 (c)). この製造手順を説明すると、まず、原型コイルアンテナ3のうち、折り返し二重線部3g、3hを境にした両側のうちの片側半分、例えば右側半分を左側半分に対して、折り返し二重線部3g、3hが直線状となるように、上下に180度回転させて図2(b)に示す中間コイルアンテナ5を形成する。 To explain this production procedure, firstly, of the prototype coil antenna 3, folded double line section 3g, 3h one half of the two sides of the boundary, for example, with respect to the right half left half, folded doublet portion 3g, 3h is such that the straight line, vertically rotated 180 degrees to form an intermediate coil antenna 5 shown in FIG. 2 (b).

次に、中間コイルアンテナ5の右側半分を、直線状に伸びた折り返し二重線部3g、3hを中心にして180度回転させて左側半分に重ねるように折り返す。 Next, the right half of the intermediate coil antenna 5, the linear elongation folded doublet unit 3g, 3h in the center is rotated 180 degrees and folded to overlap in the left half. これにより、図2(c)に示す小型コイルアンテナ4が形成される。 Thus, a small coil antenna 4 shown in FIG. 2 (c) is formed. このようにして形成された小型コイルアンテナ4において、4辺4a〜4dは、いずれも2本の線からなる。 Thus in a small coil antenna 4 formed by, four sides 4a~4d are both composed of two lines. つまり、小型コイルアンテナ4の上辺4aは、原型コイルアンテナ3の上辺3cの左側半分3c−1と下辺3dの右側半分3d−2とからなり、下辺4bは、原型コイルアンテナ3の下辺3dの左側半分3b−1と上辺3cの右側半分3c−2とからなる。 That is, the upper side 4a of the small coil antenna 4 is composed of a right half 3d-2 Metropolitan left half 3c-1 and the lower side 3d of the upper side 3c of prototype coil antenna 3, the lower side 4b is left of the lower side 3d prototype coil antenna 3 half consists 3b-1 and the upper 3c right half 3c-2 Prefecture of. また、小型コイルアンテナ4の左辺4cは、原型コイルアンテナ3の左辺3eと右辺3fとからなり、右辺4dは、原型コイルアンテナ3の直線状に伸びた2本の折り返し二重線部3g、3hからなる。 Also, the left side 4c of the small coil antenna 4 is composed of a left 3e and right 3f prototype coil antenna 3, the right side 4d has two folding double line portion 3g extending linearly prototype coil antenna 3, 3h consisting of.

小型コイルアンテナ4を非接触通信装置に組み付けた場合、非接触通信装置からICカードやRFIDタグなどのデータキャリアへの送信時、小型コイルアンテナ4には電流が流れる。 When assembled with the small coil antenna 4 in a non-contact communication device, when transmission from the non-contact communication device to the data carrier such as an IC card or RFID tag, current flows through the small coil antenna 4. このとき、各辺4a〜4dの2本の線にはそれぞれ同じ方向の電流が流れる。 In this case, two to the line current of the respective same directions of the sides 4a~4d flows. このため、小型コイルアンテナ4は、大きさが原型コイルアンテナ3の半分で、原型コイルアンテナ4の2倍の強さの磁界を発生することとなり、非接触通信装置にごく近い範囲でデータキャリアと通信するような場合に好都合となる。 Therefore, a small coil antenna 4 is half the size of prototype coil antenna 3, it is possible to generate a magnetic field of twice the strength of the original coil antenna 4, and the data carrier in a very close range to the non-contact communication device It is advantageous if such communication.

一方、原型コイルアンテナ3をそのまま非接触通信装置のコイルアンテナとして使用すれば、広い範囲で一様な磁界を生成するようになる。 On the other hand, the use of prototype coil antenna 3 as it is as a coil antenna of the non-contact communication device, so to generate a uniform magnetic field in a wide range.
このように、原型コイルアンテナ3をそのまま使用することにより、広い範囲で一様な磁界を生成し、小型のコイルアンテナ4に変えて使用することにより、原型コイルアンテナ3の2倍の強さの磁界を狭い範囲で生成することができ、一種類のコイルアンテナで、容易に2つの使用環境に対応することができる。 Thus, by directly using the prototype coil antenna 3, and generates a uniform magnetic field in a wide range, by using in place of the small coil antenna 4, twice the original coil antenna 3 Strength of can generate a magnetic field in a narrow range, with one type of coil antenna, it is possible to easily correspond to the two environment.

[第3実施例] Third Embodiment
図3は本発明の第3実施例を示す。 Figure 3 shows a third embodiment of the present invention. この実施例は請求項1および4に対応する。 This embodiment corresponds to claims 1 and 4.
この実施例が図2に示す第2実施例と異なるところは、図3(a)に示すように、原型コイルアンテナ6の上辺6cだけに、その中間から下辺6dに向って伸びる折り返し二重線部6gを形成したところにある。 When this embodiment is different from the second embodiment shown in FIG. 2, as shown in FIG. 3 (a), only the upper side 6c of the original coil antenna 6, folded double line extending toward from the middle lower side 6d there is to the formation of the part 6g. なお、折り返し二重線部6gの先端は実際には下辺6dに接しているが、わかり易く図示したため、図では離れている。 Although actually the tip of the folded double line portions 6g are in contact with the lower side 6d, because of the clarity shown apart in Figure.

この原型コイルアンテナ6から小型コイルアンテナ7を製造するには、図3(b)に示すように、原型コイルアンテナ6の右側半分を、折り返し二重線部6gを直線状に伸ばすように180度回転させて中間コイルアンテナ8を形成し、次いで、この中間コイルアンテナ8の右下側半分を、直線状に伸びた折り返し二重線部6gと下辺6dの交差部で折り返すように180度回転させて左上側半分に重ねるようにする。 To produce the compact coil antenna 7 from the original coil antenna 6, as shown in FIG. 3 (b), the right half of the original coil antenna 6, 180 to stretch the folding double line portion 6g linearly rotate to form an intermediate coil antenna 8, then the lower right half of the intermediate coil antenna 8, is rotated 180 degrees to wrap at the intersection of the straight line in the extended folded double line section 6g and the lower side 6d to be overlapped on the upper left side of half Te. これにより、図3(c)に示すような、各辺7a〜7dが2本の線からなる小型コイルアンテナ7が製造される。 Thus, as shown in FIG. 3 (c), a small coil antenna 7 each side 7a~7d is composed of two lines is produced.

[第4実施例] Fourth Embodiment
図4は本発明の第4実施例を示す。 Figure 4 shows a fourth embodiment of the present invention. この実施例は請求項2および5に対応する。 This embodiment corresponds to claim 2 and 5.
図4(a)は原型コイルアンテナ9を示す。 FIG. 4 (a) shows the original coil antenna 9. この原型コイルアンテナ9は、1本の銅線によって矩形状に形成され、両端部は非接触通信装置に接続される接続部9a、9bとされている。 The prototype coil antenna 9 is formed in a rectangular shape by a single copper wire, both ends connecting portion 9a which is connected to the non-contact communication device, there is a 9b. この原型コイルアンテナ9の1組の対向2辺9c、9dの長さ方向中間および残る1組の対向2辺9e、9fの長さ方向中間には、それぞれ対向する辺に向って伸びるほぼU字状の折り返し二重線部9g〜9jが形成されている。 A pair of opposing two sides 9c of the prototype coil antenna 9, 9d longitudinal middle and left pair of opposing two sides 9e, the lengthwise intermediate 9f, substantially U-extending toward the respective opposite sides Jo the folded double line portion 9g~9j is formed. なお、折り返し二重線部9g〜9jの先端は実際には互いに接しているが、わかり易く図示したため、図では離れている。 Although the tip of the folded double line portion 9g~9j are actually in contact with each other, because of the clarity shown apart in Figure.

このフレキシブルな原型コイルアンテナ9から発生磁界の強さが4倍で且つ大きさが4分の1の小型コイルアンテナ10を製造する。 The flexible strength of the magnetic field generated from the original coil antenna 9 and the size four times to produce a compact coil antenna 10 of a quarter. ここで、原型コイルアンテナ9から小型コイルアンテナ10(図10(e)参照)を製造する手順を説明すると、まず、原型コイルアンテナ9のうち、例えば折り返し二重線部9g、9hを境にした両側のうちの片側半分、例えば右側半分を左側半分に対して、折り返し二重線部9g、9hが直線状となるように、180度回転させる。 Here, a procedure of manufacturing a small-sized coil antenna 10 (see FIG. 10 (e)) from original coil antenna 9, first, of the prototype coil antenna 9, for example, it was folded doublet unit 9 g, the 9h bordering one half of each side, for example, the right half of the left half, as folded double line section 9 g, 9h becomes linear, is rotated 180 degrees. この状態を図4(b)に示す。 This state is shown in Figure 4 (b). 次に、図4(b)の状態から右側半分を、直線状に伸びた折り返し二重線部9g、9hを中心にして180度回転させて左側半分に重ねるように折り返して図4(c)に示すような中間コイルアンテナ11を形成する。 Next, the right half from the state of FIG. 4 (b), folded to overlap in the left half is rotated 180 degrees around a straight line in the extended folded doublet unit 9 g, the 9h FIG 4 (c) the intermediate coil antenna 11 shown in form.

この後、中間コイルアンテナ11の折り返し二重線部9i、9jを境にした両側のうちの片側半分、例えば上側半分を、折り返し二重線部9i、9jが直線状となるように、180度回転させる。 Thereafter, the folded doublet portion 9i of the intermediate coil antenna 11, one half of the two sides of the boundary 9j, for example, the upper half, as folded double line section 9i, 9j is linear, 180 ° rotate. この状態を図4(d)に示す。 This state is shown in FIG. 4 (d). 次に、図4(d)の状態から上右側半分を、直線状に伸びた折り返し二重線部9g〜9jの交差部分で180度回転させて左下側半分に重ねるように折り返して図4(e)に示すような小型コイルアンテナ10を形成する。 Next, FIG. 4 upper right half from the state of FIG. 4 (d), folded to overlap the lower left side half in cross section of the folded double line portion 9g~9j extending linearly rotated 180 degrees ( to form a compact coil antenna 10, as shown in e).

このようにして形成された小型コイルアンテナ10において、4辺10a〜10dは、いずれも4本の線からなる。 In small coil antenna 10 formed in this manner, four sides 10a~10d are both composed of 4 lines. つまり、小型コイルアンテナ4の上辺10aは、原型コイルアンテナ3の折り返し二重線部9g〜9jの半分部分からなり、下辺10bは、原型コイルアンテナ9の上辺9cの右側半分9c−2、下辺9dの左側半分9d−1、左辺9eの上側半分9e−2、右辺9fの上側半分9f−2からなる。 That is, the upper side 10a of the small coil antenna 4 is made half of the folded double line portion 9g~9j prototype coil antenna 3, the lower side 10b is the right half 9c-2 of the upper side 9c prototype coil antenna 9, the lower side 9d the left half 9d-1, the upper half 9e-2 on the left-hand side 9e, made from the upper half 9f-2 on the right side 9f.

また、小型コイルアンテナ10の左辺10cは、原型コイルアンテナ9の上辺9cの左側半分9c−1、下辺9dの右側半分9d−2、左辺9eの下側半分9e−1、右辺9fの上側半分9f−1からなり、右辺10dは、原型コイルアンテナ3の折り返し二重線部9g〜9jの残りの半分からなる。 Also, the left side 10c of the small coil antenna 10, the left half 9c-1 of the upper side 9c prototype coil antenna 9, the right half 9d-2 of the lower side 9d, lower half 9e-1 of the left-hand 9e, upper half of the right side 9f 9f consists -1, right 10d consists remaining half of the folded double line portion 9g~9j prototype coil antenna 3.
小型コイルアンテナ10を非接触通信装置に組み付けた場合、非接触通信装置からICカードやRFIDタグなどのデータキャリアへの送信時、小型コイルアンテナ10には電流が流れる。 When assembled with the small coil antenna 10 to the non-contact communication device, when transmission from the non-contact communication device to the data carrier such as an IC card or RFID tag, the small coil antenna 10 current flows. このとき、各辺10a〜10dの4本の線にはそれぞれ同じ方向の電流が流れる。 In this case, each current flows in the same direction in the four lines of each side 10 a to 10 d. このため、小型コイルアンテナ10は、大きさが原型コイルアンテナ9の4分の1で、原型コイルアンテナ9の4倍の強さの磁界を発生することとなる。 Therefore, a small coil antenna 10, the size is at a quarter of the original coil antenna 9, and generating a 4 times stronger magnetic field of the original coil antenna 9. 従って、非接触通信装置に極く近い範囲でデータキャリアと通信するような場合に好都合となる。 Therefore, advantageous when at very close range to the non-contact communication device to communicate with the data carrier.

一方、原型コイルアンテナ9をそのまま非接触通信装置のコイルアンテナとして使用すれば、広い範囲で一様な磁界を生成するようになる。 On the other hand, the use of prototype coil antenna 9 as it is as a coil antenna of the non-contact communication device, so to generate a uniform magnetic field in a wide range.
このように、原型コイルアンテナ9をそのまま非接触通信装置のコイルアンテナとして使用することにより、広い範囲で一様な磁界を生成し、小型のコイルアンテナ10に変えて使用することにより、原型コイルアンテナ9の4倍の強さの磁界を狭い範囲で生成することができ、一種類のコイルアンテナで、容易に2つの使用環境に対応することができる。 Thus, by using a prototype coil antenna 9 as it is as a coil antenna of the non-contact communication device, to generate a uniform magnetic field in a wide range, by using in place of the coil antenna 10 small, prototype coil antenna 4 times stronger magnetic field of 9 can the be generated in a narrow range, with one type of coil antenna, it is possible to easily correspond to the two environment.

本発明の第1実施例を示すもので、原型コイルアンテナから小型コイルアンテナを製造する手順を示す概略図 It shows a first embodiment of the present invention, a schematic diagram illustrating a procedure of manufacturing a small-sized coil antenna from original coil antenna 本発明の第2実施例を示す図1相当図 Figure 1 corresponds diagram showing a second embodiment of the present invention 本発明の第3実施例を示す図1相当図 Figure 1 corresponds diagram showing a third embodiment of the present invention 本発明の第4実施例を示す図1相当図 Figure 1 corresponds diagram showing a fourth embodiment of the present invention

符号の説明 DESCRIPTION OF SYMBOLS

図面中、1、3、6、9は原型コイルアンテナ、2、4、7、10は小型コイルアンテナ、5、8、11は中間コイルアンテナである。 In the drawings, 1, 3, 6, 9 is the prototype coil antenna, the 2,4,7,10 small coil antenna, the 5, 8, 11 is an intermediate coil antenna.

Claims (5)

  1. ほぼ矩形状をなし、1組の対向する2辺のうちの少なくとも一方の辺の中間に他方の辺に向って伸びる折り返し二重線部を形成してなるフレキシブルな非接触通信装置用コイルアンテナ。 Substantially rectangular shape, one pair of opposing two sides of at least one side of the intermediate to the other to form a folded double line portion extending toward the side formed by a flexible, non-contact communication device coil antenna of.
  2. ほぼ矩形状をなし、1組の対向する2辺の中間および残る1組の対向する2辺の中間に、それぞれ対向する辺に向って伸びる折り返し二重線部を形成してなるフレキシブルな非接触通信装置用コイルアンテナ。 Substantially a rectangular shape, a pair of opposing two sides of the middle and left pair of opposing two sides intermediate, flexible non-contact by forming a folded double line portion extending toward the respective opposite sides communication device coil antenna.
  3. ほぼ矩形状に形成されたフレキシブルな原型コイルアンテナを、1組の対向する二辺の偶数箇所で折り返すことにより、前記原型コイルアンテナより小型で該原型コイルアンテナと同等の磁界強度を生成する小型コイルアンテナを形成するようにしたことを特徴とする非接触通信装置用コイルアンテナの製造方法。 A substantially rectangular shape formed flexible prototype coil antenna, a set of by folding an even portion of the two opposing sides, a small coil for generating a magnetic field strength equivalent to that of the raw coil antenna than compact the prototype coil antenna method of manufacturing a non-contact communication device coil antenna, characterized in that so as to form an antenna.
  4. ほぼ矩形状をなし、1組の対向する2辺のうちの少なくとも一方の辺の中間に他方の辺に向って伸びる折り返し二重線部が形成されたフレキシブルな原型コイルアンテナにおいて、当該原型コイルアンテナの片側半分を残る片側半分に対して前記折り返し二重線部が直線状となるように180度回転させ、その後、前記原型コイルアンテナの前記片側半分を前記残る片側半分に重ねるように折り返すことによって前記原型コイルアンテナより小型で該原型コイルアンテナより強い磁界強度を生成する小型コイルアンテナを形成するようにしたことを特徴とする非接触通信装置用コイルアンテナの製造方法。 Substantially rectangular shape, in one set of opposing two sides flexible prototype coil antenna middle extending toward the other side folded double line of at least one side is formed of, the original coil antenna of the folded double-line portion with respect to one half the remaining one side half is rotated 180 degrees so that the linear, then, by folding the one half of the original coil antenna to overlap the one half remaining the method of manufacturing a non-contact communication device coil antenna, characterized in that so as to form a compact coil antenna for generating a magnetic field strength stronger than said original coil antenna compact than the original coil antenna.
  5. ほぼ矩形状をなし、1組の対向する2辺の中間および残る1組の対向する2辺の中間に、それぞれ対抗する辺に向って伸びる折り返し二重線部が形成されたフレキシブルな原型コイルアンテナにおいて、当該原型コイルアンテナの片側半分を残る片側半分に対して前記2組の対向する2辺のうちの一方の組の対向2辺の前記折り返し二重線部が直線状となるように180度回転させ、その後、前記原型コイルアンテナの前記片側半分を前記残る片側半分に重ねるように折り返すことによって中間コイルアンテナを形成し、 Substantially rectangular shape, one pair of opposing two sides of the middle and left pair of opposing two sides intermediate, flexible prototype coil antenna folded doublet portion is formed extending toward the sides against each in the two sets of 180 degrees as the folded double line of one set of opposing two sides of the opposite two sides is linear with respect to half side remaining one side half of the original coil antenna rotate, then, the intermediate coil antenna formed by folding the halves of the original coil antenna to overlap the one half remaining above,
    前記中間コイルアンテナの片側半分を残る片側半分に対して前記2組の対向する2辺のうちの他方の組の対向2辺の前記折り返し二重線部が直線状となるように180度回転させ、その後、前記中間コイルアンテナの前記片側半分を前記残る片側半分に重ねるように折り返すことによって前記原型コイルアンテナより小型で該原型コイルアンテナより強い磁界強度を生成する小型コイルアンテナを形成するようにしたことを特徴とする非接触通信装置用コイルアンテナの製造方法。 Rotate 180 degrees as the folded double line of the other set of opposing two sides of said two sets of opposing two sides becomes linear with respect to one half the remaining one side half of the intermediate coil antenna , then to form a compact coil antenna for generating a magnetic field strength stronger than said original coil antenna compact than the original coil antenna by folding the halves of the intermediate coil antenna to overlap the one half remaining the method of manufacturing a non-contact communication device coil antenna, characterized in that.

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