JP2007317914A - Air core coil and electric circuit unit using the same - Google Patents

Air core coil and electric circuit unit using the same Download PDF

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JP2007317914A
JP2007317914A JP2006146424A JP2006146424A JP2007317914A JP 2007317914 A JP2007317914 A JP 2007317914A JP 2006146424 A JP2006146424 A JP 2006146424A JP 2006146424 A JP2006146424 A JP 2006146424A JP 2007317914 A JP2007317914 A JP 2007317914A
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core coil
air
coil
coil body
winding
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Yoshi Takaishi
好 高石
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ASUKA ELECTRON KK
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ASUKA ELECTRON KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an air core coil which is suitably used for a power transmission device for charging a secondary battery built in an electronic device in a non-contact manner, an information transmission device or the like; and which can be made compact, have a high efficiency, and also facilitate inductance adjustment. <P>SOLUTION: An air core coil 1 includes a flat coil body 2 of the air core coil having a conductor formed to be spirally wound on a plane, and a plate-shaped shield member 3 covering one surface of the coil body. A lead wire of the coil body at its inner circumferential side is passed through a hollow part made in the center of the air core coil body, and through a through-hole made in the center of the shield material, and then led out outside the outer surface of the shield material. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、電子機器に内蔵される２次電池を非接触で充電する電力伝送装置や、情報伝送装置等に使用するに適した空芯コイル、及びこれを用いたモジュールに関するものである。   The present invention relates to a power transmission device for charging a secondary battery built in an electronic device in a non-contact manner, an air-core coil suitable for use in an information transmission device, and a module using the same.

非接触で配置した１次側コイルと２次側コイルとを磁気的に結合し、電磁誘導を利用して電力を伝送する電力伝送装置が、例えば携帯電話機の充電等に使用されることが多くなっている。この種の携帯電話機の充電装置は、充電機側に一次コイルが、また携帯電話機側に二次コイルがそれぞれ設けられ、一次コイルから発生する交流磁力線が二次コイルを貫通して、二次コイルに交流の起電力が発生させるようになっている。この起電力は、直流の電力に変換され、携帯電話機の二次電池に充電されるのである。   A power transmission device that magnetically couples a primary coil and a secondary coil arranged in a non-contact manner and transmits electric power using electromagnetic induction is often used for charging a mobile phone, for example. It has become. In this type of mobile phone charging device, a primary coil is provided on the charger side and a secondary coil is provided on the mobile phone side, and AC magnetic field lines generated from the primary coil pass through the secondary coil, and the secondary coil An AC electromotive force is generated. This electromotive force is converted into direct current power, and the secondary battery of the mobile phone is charged.

上記のような非接触で電力を伝送する装置としては、例えば下記特許文献１に開示されている。また、導線を螺旋状に巻回した空芯コイルとしては、例えば特許文献２、３に記載されているようなものが知られている。   As an apparatus for transmitting electric power in a non-contact manner as described above, for example, it is disclosed in Patent Document 1 below. Moreover, as an air core coil which wound the conducting wire spirally, for example, those described in Patent Documents 2 and 3 are known.

特開２００２−３４１６９号公報JP 2002-34169 A 特開２００４−１８０３６７号公報JP 2004-180367 A 特開平８−３３２８９号公報JP-A-8-33289

この種の非接触式電力伝送装置に使用されるコイルは、用途上できるだけコンパクトで表皮効果と渦電流損の少ないものであるのが望ましい。コイルをできるだけコンパクトにするためには、形状が扁平な空芯コイルで、できるだけ薄いものが好ましい。しかしながら、上記特許文献２、３に記載されているものは、扁平な形状のものとは言えない。   It is desirable that the coil used in this type of non-contact power transmission apparatus is as compact as possible and has a low skin effect and low eddy current loss. In order to make the coil as compact as possible, an air-core coil with a flat shape, which is as thin as possible, is preferable. However, what is described in Patent Documents 2 and 3 cannot be said to have a flat shape.

一方、扁平な空芯コイルは、インダクタンスにバラツキ（例えば、直径４５ｍｍ程度のコイルでは、２％程度のバラツキが生じる）があり、コンデンサの容量にもバラツキがあるため、空芯コイルをコンデンサと組み合わせて電気回路を構成する場合は、コイルのインダクタンスを調整してバランスをとる必要がある。空芯コイルのインダクタンスの調整は、外周側（巻き終わり側）の巻き線の巻き付け量を増やしたり減らしたりすることによって行うことができるが、コイルの巻き量を増減してインダクタンスの調整を行うと、コイルの巻き終わり位置がコイルの周方向に沿ってずれることになるので、当然ながら該巻き終わり位置から引き出すリード線の引き出し位置がコイルの外周に沿って移動しする。このため、所定の位置に設けられた端子に接続するのに都合が悪く、例えばリード線が不必要に長くなって弛んだりするという問題が生じる。   On the other hand, a flat air-core coil has a variation in inductance (for example, a coil having a diameter of about 45 mm has a variation of about 2%), and a capacitance of the capacitor also varies. Therefore, an air-core coil is combined with a capacitor. When configuring an electric circuit, it is necessary to adjust the coil inductance to achieve a balance. The inductance of the air-core coil can be adjusted by increasing or decreasing the winding amount of the winding on the outer peripheral side (winding end side), but if the inductance is adjusted by increasing or decreasing the winding amount of the coil Since the winding end position of the coil is shifted along the circumferential direction of the coil, the lead wire drawing position that is drawn from the winding end position naturally moves along the outer periphery of the coil. For this reason, it is inconvenient to connect to a terminal provided at a predetermined position, and there arises a problem that, for example, the lead wire becomes unnecessarily long and becomes loose.

そこで、本発明は、できるだけコンパクトな空芯コイルを提供しながら、当該空芯コイルのインダクタンスを簡単に調整することができ、しかも巻き始め側と巻き終わり側からそれぞれ引き出したリード線を、所定の位置に設けられたそれぞれの接続用端子に弛まないように接続することができるようにすることを課題としている。   Therefore, the present invention can easily adjust the inductance of the air-core coil while providing a compact air-core coil as much as possible. It is an object of the present invention to enable connection to each connection terminal provided at a position so as not to loosen.

本発明は、上記課題を解決するため、次のような構成を採用した。すなわち、請求項１に記載の空芯コイルは、平面上で導線を螺旋状に巻回して構成した扁平な空芯コイル本体と、該コイル本体の一方の面を覆う平板状シールド部材とからなり、前記コイル本体の内周側のリード線は、前記空芯コイル本体の中央部に形成されている中空部から前記シールド材の中央部に形成されている通孔を通って該シールド材の外面に引き出されていることを特徴としている。この空芯コイル本体は、請求項２に記載したように、円板状としておくのが好ましい。また、請求項３に記載のように、この空芯コイル本体とシールド材とを合成樹脂のモールド材で包み込んでおくのが好ましい。   In order to solve the above problems, the present invention employs the following configuration. That is, the air-core coil according to claim 1 is composed of a flat air-core coil body formed by spirally winding a conductive wire on a plane, and a flat shield member covering one surface of the coil body. The lead wire on the inner peripheral side of the coil body passes through the through hole formed in the central portion of the shield material from the hollow portion formed in the central portion of the air-core coil main body. It is characterized by being drawn out. As described in claim 2, it is preferable that the air-core coil body has a disk shape. Further, as described in claim 3, it is preferable to enclose the air-core coil body and the shield material with a synthetic resin molding material.

次に、請求項４に記載の発明は、導線を螺旋状に巻回して構成した扁平な空芯コイル本体の一方の面をシールド材で覆ってなる空芯コイルと、コンデンサとで構成され、前記空芯コイル本体の巻き線の両側の端部から引き出されたリード線が、前記コンデンサに電気的に接続され、これら空芯コイル本体とコンデンサとで共振回路が構成されている電気回路ユニットである。この場合、前記空芯コイルとコンデンサとをプリント基板に取り付け、このプリント基板を、コイル取り付け部とコンデンサ取り付け部との境界部に設けた切り目で分割可能に形成しておくのが好ましい。   Next, the invention according to claim 4 is constituted by an air-core coil formed by covering one surface of a flat air-core coil body formed by spirally winding a conducting wire with a shield material, and a capacitor. An electric circuit unit in which lead wires drawn from both ends of the winding of the air-core coil body are electrically connected to the capacitor, and a resonance circuit is constituted by the air-core coil body and the capacitor. is there. In this case, it is preferable that the air-core coil and the capacitor are attached to a printed circuit board, and the printed circuit board is formed so as to be separable by a cut provided at a boundary portion between the coil attaching portion and the capacitor attaching portion.

本願発明に係る空芯コイルは、その外周側のリード線の引き出し位置（コイルの巻き終わり位置）をコイルの巻き方向（周方向）に沿って前後に変化させることにより、コイルの巻き量を増減し、インダクタンスを調整することができる。したがって、インダクタンスの調整は簡単である。一方、中心側（通常は巻き始め側である）のリード線を、中央に形成されている中空部を通してシールド材の外面側に引き出し、該シールド材の外面に沿ってコイルの外周側の所定位置（接続端子の位置）に向かって引き出すので、３６０度の範囲でいずれの方向にも引き出すことが可能である。このため、外周側の巻き上がり位置がコイル外周部のどの位置にあっても、両リード線を互いに接近させて並列に並べた状態で所定の位置に設けられた端子に接続することができる。   In the air-core coil according to the present invention, the winding amount of the coil is increased or decreased by changing the lead wire drawing position (coil winding end position) on the outer circumference side back and forth along the coil winding direction (circumferential direction). Inductance can be adjusted. Therefore, adjustment of the inductance is simple. On the other hand, the lead wire on the center side (usually the winding start side) is pulled out to the outer surface side of the shield material through the hollow portion formed in the center, and a predetermined position on the outer peripheral side of the coil along the outer surface of the shield material Since it pulls out toward the (connection terminal position), it can be pulled out in any direction within a range of 360 degrees. For this reason, even if the winding position on the outer peripheral side is at any position on the outer peripheral portion of the coil, both lead wires can be connected to a terminal provided at a predetermined position in a state of being arranged in parallel.

また、この空芯コイルは、片面がシールド材で覆われるので、当該片面側からの電磁波の影響を受けず、良好な性能を確保することができる。なお、上記コイルの中心側のリード線は、シールド材の外側を通して所定位置まで引き出すことができるので、当該リード線によるインダクタンスへの悪影響が避けられる。   In addition, since one surface of the air-core coil is covered with a shielding material, good performance can be ensured without being affected by the electromagnetic wave from the one surface side. Since the lead wire on the center side of the coil can be pulled out to a predetermined position through the outside of the shield material, adverse effects on inductance due to the lead wire can be avoided.

以下、本発明の好ましい実施形態について具体的に説明する。図１は本発明に係る空芯コイルの一例を表すもので、この空芯コイル１は、コイル本体２と、シールド材３とを備えた扁平な円板状に形成されている。コイル本体２は、導線２ａを平面上で螺旋状に巻回してなるもので、その中央部に表裏に通ずる中空部５が形成されている。図示例では、螺旋状の巻き線部が１層で、全体的に薄いものとなっているが、場合によっては巻き線部を２層以上に重ねた複合コイルとしてもよい。なお、図示例ではコイル本体２が円形に形成されているが、４角形もしくはそれ以上の多角形とすることもできる。コイル本体２における巻き線は、互いに密着するように巻かれていてもよく、隣接する線同士の間に隙間が形成されていてもよい。   Hereinafter, preferred embodiments of the present invention will be specifically described. FIG. 1 shows an example of an air-core coil according to the present invention. The air-core coil 1 is formed in a flat disk shape having a coil body 2 and a shield material 3. The coil body 2 is formed by winding a conducting wire 2a in a spiral shape on a plane, and a hollow portion 5 is formed in the center of the coil body 2 so as to communicate with the front and back. In the illustrated example, the spiral winding portion is one layer, and is thin as a whole. However, in some cases, it may be a composite coil in which the winding portions are stacked in two or more layers. In the illustrated example, the coil body 2 is formed in a circular shape, but may be a quadrangular shape or a polygon having a larger shape. The windings in the coil body 2 may be wound so as to be in close contact with each other, and a gap may be formed between adjacent wires.

コイル本体２の巻き線を構成する導線２ａは、絶縁被覆を施した高電導度を有する銅等の金属線であり、単線でもよく、撚り線でもよく、複数の細い絶縁導線を撚り合わせて１本とし、その上に絶縁被覆をしたいわゆるリッツ線でもよい。場合によっては、平角線でもよい。コイル本体２おける導線２ａの巻き数は、例えば携帯電話機の電力伝送装置用コイル等では、１０〜５０回とするのが好ましく、１５〜２５回とするのがより好ましい。この巻き数が少な過ぎると、磁界の発生状態が悪くなって伝送効率が低下し、逆に巻き数が多過ぎると、直流抵抗が増大して効率が悪化するとともに、電力を短時間で伝送するのが難しくなるので、上記範囲が好ましい。   The conducting wire 2a constituting the winding of the coil body 2 is a metal wire such as copper having a high conductivity with an insulating coating, and may be a single wire, a stranded wire, or a plurality of thin insulated conducting wires twisted together. A so-called litz wire having a book and an insulating coating thereon may be used. In some cases, a flat wire may be used. The number of turns of the conducting wire 2a in the coil body 2 is preferably 10 to 50 times, and more preferably 15 to 25 times, for example, in a coil for a power transmission device of a mobile phone. If the number of turns is too small, the generation state of the magnetic field is deteriorated and the transmission efficiency is lowered. On the other hand, if the number of turns is too large, the direct current resistance is increased and the efficiency is deteriorated, and the power is transmitted in a short time. Therefore, the above range is preferable.

コイル本体２の片面を覆うシールド材３は、銅、亜鉛等の軟磁性体金属又は合金を含む公知のシールド材を円板状に成形したもので、コイル本体２と同様に、中央部に通孔６が穿孔されている。この通孔６の径は、上記コイル本体２の中空部５の直径よりも小さく、後述のリード線をそれほど遊び無く挿通できるような大きさとなっている。シールド材３は、できるだけ軽量で磁界に対するシールド効果の高いものを使用するのが好ましい。シールド材３は、コイル本体に接着剤で接着しておけばよい。   The shield material 3 covering one side of the coil body 2 is a known shield material containing a soft magnetic metal or alloy such as copper or zinc formed into a disk shape. A hole 6 is drilled. The diameter of the through hole 6 is smaller than the diameter of the hollow portion 5 of the coil body 2 and is sized so that a lead wire described later can be inserted without much play. It is preferable to use a shield material 3 that is as light as possible and has a high shielding effect against a magnetic field. The shield material 3 may be bonded to the coil body with an adhesive.

コイル本体２のリード線（導線２ａを螺旋状の巻き線部分から引き出した線）７のうち、巻き始め側（図示例では中心側）のリード線７ａは、前記シールド材３の通孔６を通して該シールド材３の外面側に引き出されている。また、巻き上がり側（図示例では外周側）のリード線７ｂは、コイル本体２の巻き上がり位置から屈曲させて引き出されている。巻き始め側のリード線７ａは、中央部に設けられている通孔６からコイル本体２の外周に向かって３６０の範囲であらゆる方向に引き出すことができる。   Of the lead wires 7 of the coil body 2 (wires drawn from the spiral winding portion) 7, the lead wire 7 a on the winding start side (center side in the illustrated example) passes through the through hole 6 of the shield material 3. It is pulled out to the outer surface side of the shield material 3. Further, the lead wire 7b on the winding side (in the illustrated example, on the outer peripheral side) is bent out from the winding position of the coil body 2 and drawn out. The lead wire 7a on the winding start side can be drawn out in all directions within a range of 360 from the through hole 6 provided in the central portion toward the outer periphery of the coil body 2.

このコイル本体２のインダクタンスの調節は、巻き線の量を増減することによって行うことができる。具体的には、外周側の巻き終わり位置をコイル本体２の周方向に沿って前後に移動させること（導線２ａの巻き量が増減する）により調節できる。インダクタンスを小さくするためには最外周側の巻き線を必要長さだけ解き、インダクタンスを大きくするためには、導線２ａをさらに巻き足せばよい。   The adjustment of the inductance of the coil body 2 can be performed by increasing or decreasing the amount of winding. Specifically, the winding end position on the outer peripheral side can be adjusted by moving back and forth along the circumferential direction of the coil body 2 (the winding amount of the conducting wire 2a is increased or decreased). In order to reduce the inductance, the winding on the outermost peripheral side is unwound by a required length, and in order to increase the inductance, the conducting wire 2a may be further wound.

次に、図２は、この空芯コイル１を用いて形成する電気回路の例を表す。この電気回路は共振回路であり、図３に示す空芯コイル１と２個のコンデンサＣ１、Ｃ２とで構成される。コンデンサの数は１個でもよく、３個以上でもよい。これらの部品を、図４に示すプリント基板１０に図５、図６に示すように取り付けて、配線１２の端子１３に電気的に接続する。この場合、プリント基板１０とコイル本体２との間にシールド材３が介装され、コイル本体２の中心側からのリード線７ａが当該シールド材３の中央部に設けられている通孔６を通ってシールド材３の外面側に引き出され、プリント基板１０設けられた電気配線に接続される。これにより、図５に示すようなモジュール（電気回路ユニット）２０が得られる。   Next, FIG. 2 shows an example of an electric circuit formed using the air-core coil 1. This electric circuit is a resonance circuit, and includes the air-core coil 1 and two capacitors C1 and C2 shown in FIG. The number of capacitors may be one, or three or more. These components are attached to the printed board 10 shown in FIG. 4 as shown in FIGS. 5 and 6 and electrically connected to the terminals 13 of the wiring 12. In this case, the shield material 3 is interposed between the printed circuit board 10 and the coil main body 2, and the lead wire 7 a from the center side of the coil main body 2 passes through the through hole 6 provided in the central portion of the shield material 3. It passes through the outer surface of the shield material 3 and is connected to the electrical wiring provided on the printed circuit board 10. Thereby, a module (electric circuit unit) 20 as shown in FIG. 5 is obtained.

図５に示すモジュール（電気回路ユニット）では、巻き終わり側のリード線７ｂが巻き始め側のリード線７ａと平行となっているが、図７に示すモジュールでは、巻き上がりの位置が９０度ずれて、巻き上がり側のリード線７ｂが巻き始め側のリード線７ａに対し直角に延びている。また、図８に示すモジュールでは、巻き上がり位置がさらに９０度ずれて、両リード線７ａ，７ｂが平行となっている。さらに図９に示すモジュールでは、巻き上がり位置がさらに９０度ずれて、両リード線７ａ，７ｂが直角となっている。なお、以上の例では、両リード線７ａ，７ｂの位置が９０度づつずれた例について述べたが、図１０、図１１に示すモジュールのように、両リード線の角度が任意の角度（α）となるように巻き上がり位置がずれていてもよい。   In the module shown in FIG. 5 (electric circuit unit), the lead wire 7b on the winding end side is parallel to the lead wire 7a on the winding start side. However, in the module shown in FIG. Thus, the lead wire 7b on the winding side extends at right angles to the lead wire 7a on the winding start side. In the module shown in FIG. 8, the winding position is further shifted by 90 degrees, and both the lead wires 7a and 7b are parallel. Further, in the module shown in FIG. 9, the winding position is further shifted by 90 degrees, and both the lead wires 7a and 7b are perpendicular. In the above example, the example in which the positions of the two lead wires 7a and 7b are shifted by 90 degrees has been described. However, as in the modules shown in FIGS. 10 and 11, the angle between the two lead wires is an arbitrary angle (α ) So that the winding position may be shifted.

上記プリント基板１０には、コイル本体装着部１０ａと、コンデンサ装着部１０ｂとの境界部にミシン目状の切り目１５が形成されている。このため、この切り目１５でプリント基板１０を切り離して、空芯コイル１又はコンデンサＣ１，Ｃ２を他の回路に使用することができる。このように、空芯コイル１を現在使用されている電気回路から切り離して、他の電気回路の構成に流用できるようにしておくと、汎用性が増すので便利である。   In the printed circuit board 10, a perforated cut 15 is formed at the boundary between the coil body mounting portion 10a and the capacitor mounting portion 10b. For this reason, the printed circuit board 10 is cut off at the cut 15 and the air-core coil 1 or the capacitors C1 and C2 can be used for other circuits. As described above, it is convenient that the air-core coil 1 is separated from the currently used electric circuit so that it can be used for other electric circuit configurations because versatility is increased.

以上の例では、コイル本体２とシールド材３とを結合した空芯コイル１が裸の状態となっているが、両者を結合した状態で、リード線の先端部を除く全体をモールド材に埋め込んでもよい。図１２は、このようにモールド材２０で被覆した空芯コイルを表すもので、このモールド材２０としては、例えばエポキシ系樹脂等公知のモールド材を使用することができる。なお、この場合のモールド材は、誘電率の低いものが好ましい。このようにすると、コイルが保護されるため、傷つきにくく、寿命が長くなることが期待できる。また、コイルの巻き線部分や巻き始め位置や巻き上がり位置の位置ずれが生じにくくなるので、性能的にも安定する。   In the above example, the air-core coil 1 in which the coil body 2 and the shield material 3 are coupled is bare, but with the two coupled, the entire portion excluding the tip of the lead wire is embedded in the molding material. But you can. FIG. 12 shows an air-core coil covered with the molding material 20 as described above. As the molding material 20, a known molding material such as an epoxy resin can be used. In this case, the molding material preferably has a low dielectric constant. If it does in this way, since a coil will be protected, it will be hard to get damaged and it can be anticipated that lifetime will become long. In addition, the coil winding portion, the winding start position, and the winding position are less likely to be displaced, so that the performance is also stable.

この空芯コイル１は、平面状で螺旋状に巻回した扁平なコイルであるから、これを用いる電気機器をコンパクトなものとすることができる。また、巻き線からなるコイル本体２の片面がシールド材３で覆われているので、この面側からの電磁波等の影響を受けず、高精度を維持することができる。さらにインダクタンスを簡単に調整することができるので、例えばコンデンサと組み合わせて高効率の共振回路を構成することができる。この場合、巻き線を減らすことにより共振周波数の調整を容易に行うことができる。   Since the air-core coil 1 is a flat coil that is spirally wound in a flat shape, an electric device using the coil can be made compact. In addition, since one side of the coil body 2 made of winding is covered with the shield material 3, high accuracy can be maintained without being affected by electromagnetic waves from the surface side. Furthermore, since the inductance can be easily adjusted, for example, a highly efficient resonance circuit can be configured in combination with a capacitor. In this case, the resonance frequency can be easily adjusted by reducing the number of windings.

また、上記扁平な空芯コイル１を用いたモジュールは、コイル本体の巻き量を調節しても、巻き始め側のリード線を常に巻き終わり側のリード線に沿わせることができるので、コンパクトな配線を行うことができる。さらに、図示例のように、モジュールに用いられているプリント基板１０を、コイル装着部１０ａとコンデンサ装着部１０ｂとの境界部で分割し、両者を切り離すことができるようにしておけば、空芯コイル１やコンデンサをそのまま他の電気回路に流用することが可能となるので、実用上便利なものとなる。   In addition, the module using the flat air-core coil 1 can be compact because the lead wire on the winding start side can always follow the lead wire on the winding end side even if the winding amount of the coil body is adjusted. Wiring can be performed. Furthermore, if the printed circuit board 10 used in the module is divided at the boundary between the coil mounting portion 10a and the capacitor mounting portion 10b as shown in the illustrated example so that both can be separated, the air core Since the coil 1 and the capacitor can be used for other electrical circuits as they are, it is practically convenient.

本発明に係る係る空芯コイルは、携帯電話機の充電装置等、非接触式電力伝送装置のコイルとして効果的に利用することができる。また、この空芯コイルを用いた電気回路ユニット（モジュール）は、非接触で電力やデータを伝送する装置として携帯電話機等の分野で有効に利用できる。   The air-core coil according to the present invention can be effectively used as a coil of a non-contact power transmission device such as a charging device for a mobile phone. In addition, the electric circuit unit (module) using the air-core coil can be effectively used in the field of a cellular phone or the like as a device for transmitting electric power and data without contact.

空芯コイルの平面図（ａ）及び断面図（ｂ）である。It is the top view (a) and sectional drawing (b) of an air-core coil. 空芯コイルを用いた共振回路の回路図である。It is a circuit diagram of the resonance circuit using an air core coil. 共振回路に使用される部品の平面図である。It is a top view of the components used for a resonance circuit. プリント基板の裏面図である。It is a back view of a printed circuit board. 電気回路ユニットの平面図である。It is a top view of an electric circuit unit. その正面断面図である。It is the front sectional drawing. 上記と異なる電気回路ユニットの平面図である。It is a top view of an electric circuit unit different from the above. さらに異なる電気回路ユニットの平面図である。Furthermore, it is a top view of another electric circuit unit. さらに異なる電気回路ユニットの平面図である。Furthermore, it is a top view of another electric circuit unit. さらに異なる電気回路ユニットの平面図である。Furthermore, it is a top view of another electric circuit unit. その正面断面図である。It is the front sectional drawing. モールド材で被覆した空芯コイルの平面図（ａ）、および一部断面側面図（ｂ）である。It is the top view (a) of the air-core coil coat | covered with the mold material, and a partial cross section side view (b).

符号の説明Explanation of symbols

１ 空芯コイル
２ コイル本体
３ シールド材
５ 中空部
６ 通孔
７ リード線
１０ プリント基板
１５ 切り目 DESCRIPTION OF SYMBOLS 1 Air core coil 2 Coil main body 3 Shielding material 5 Hollow part 6 Through-hole 7 Lead wire 10 Printed circuit board 15 Notch

Claims (5)

平面上で導線を螺旋状に巻回して構成した扁平な空芯コイル本体と、該コイル本体の一方の面を覆う平板状シールド部材とからなり、前記コイル本体の内周側のリード線は、前記空芯コイル本体の中央部に形成されている中空部から前記シールド材の中央部に形成されている通孔を通って該シールド材の外面に引き出されていることを特徴とする空芯コイル。   It consists of a flat air core coil body configured by spirally winding a conducting wire on a plane, and a flat shield member covering one surface of the coil body, and the lead wire on the inner peripheral side of the coil body is An air core coil, wherein the air core coil is drawn from a hollow portion formed in a central portion of the air core coil body to an outer surface of the shield material through a through hole formed in the central portion of the shield material. . 空芯コイル本体が円板状である請求項１に記載の空芯コイル。   The air-core coil according to claim 1, wherein the air-core coil body has a disk shape. 空芯コイル本体とシールド材とが合成樹脂のモールド材で包まれている請求項１に記載の空芯コイル。   The air-core coil according to claim 1, wherein the air-core coil body and the shield material are wrapped with a synthetic resin mold material. 導線を螺旋状に巻回して構成した扁平な空芯コイル本体の一方の面をシールド材で覆ってなる空芯コイルとコンデンサとで構成され、前記空芯コイル本体の巻き線の両側の端部から引き出されたリード線が、前記コンデンサに電気的に接続され、これら空芯コイル本体とコンデンサとで共振回路が構成されている電気回路ユニット。   Consists of an air-core coil and a capacitor in which one surface of a flat air-core coil body configured by spirally winding a conductive wire is covered with a shielding material, and ends on both sides of the winding of the air-core coil body An electric circuit unit in which a lead wire drawn out from is electrically connected to the capacitor, and a resonance circuit is constituted by the air-core coil body and the capacitor. 前記空芯コイルとコンデンサがプリント基板に取り付けられ、該プリント基板が、コイル取り付け部とコンデンサ取り付け部との境界部に設けた切り目で分割可能に形成されている請求項４に記載の電気回路ユニット。   5. The electric circuit unit according to claim 4, wherein the air-core coil and the capacitor are attached to a printed circuit board, and the printed circuit board is formed so as to be divided by a cut provided at a boundary portion between the coil attachment portion and the capacitor attachment portion. .
JP2006146424A 2006-05-26 2006-05-26 Air core coil and electric circuit unit using the same Pending JP2007317914A (en)

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