JP2010010730A - Low-frequency three-axis reception antenna - Google Patents

Low-frequency three-axis reception antenna Download PDF

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JP2010010730A
JP2010010730A JP2008163944A JP2008163944A JP2010010730A JP 2010010730 A JP2010010730 A JP 2010010730A JP 2008163944 A JP2008163944 A JP 2008163944A JP 2008163944 A JP2008163944 A JP 2008163944A JP 2010010730 A JP2010010730 A JP 2010010730A
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axis
antenna
coil antenna
soft magnetic
magnetic core
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Tadashi Kotani
忠 小谷
Fumiko Akano
文子 赤野
Takayuki Ishimoto
隆幸 石本
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Hitachi Ferrite Electronics Ltd
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Hitachi Ferrite Electronics Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin low-frequency three-axis reception antenna equipped with a coil antenna of horizontal two directions (X and Y-axis) and vertical direction (Z-axis). <P>SOLUTION: The low-frequency three-axis reception antenna includes an X-axis antenna and a Y-axis antenna consisting of one-axis coil antennas 21, 22, respectively; a Z-axis coil antenna 23 provided by being wound around a bobbin 24 with circuit connection terminals 27, 28; and a cover 29 for covering the coil antennas 21, 22, 23 and engaging with the bobbin 24. In incorporating the one-axis coil antenna 21 and one-axis coil antenna 22 into the bobbin 24, the one-axis coil antenna 21 and one-axis coil antenna 22 are incorporated into the bobbin 24 in a cross shape, so that a non-winding portion 15 of a straight soft magnetic core 11 and a non-winding portion 20 of a straight soft magnetic core 16 may come into contact with each other and may be superimposed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、自動車のドアキーおよびエンジン始動キー、あるいは、住宅，マンションの玄関ドアキーに使用する認証用電子キーに内蔵する低周波信号の受信アンテナに関するものである。   The present invention relates to a low-frequency signal receiving antenna incorporated in an electronic key for authentication used for a door key of an automobile and an engine start key or an entrance door key of a house or apartment.

自動車あるいはマンション等のドアキーとして、無線を利用した電子キーの普及が著しい。この電子キーは、キー側のＩＤとドア側のＩＤを認証して、解錠あるいは施錠するものであり、ドア側より低周波のリクエスト信号が送信され、そのリクエスト信号を、人が携帯するキーに内蔵した低周波用受信アンテナが受け、携帯するキー側よりＵＨＦ（Ultra High Frequency：極超短波）を使用した応答信号が送信され、ドア側でＵＨＦの信号を受信してＩＤの認証をおこなっている。   The use of wireless electronic keys as a door key for automobiles or apartments is remarkable. This electronic key authenticates the ID on the key side and the ID on the door side and unlocks or locks it. A low frequency request signal is transmitted from the door side, and the request signal is a key carried by a person. The built-in low-frequency receiving antenna receives a response signal using UHF (Ultra High Frequency) from the portable key side, receives the UHF signal on the door side, and authenticates the ID Yes.

認証用電子キーを携帯した人が目標とするドアに対して、ドアに設けられたスイッチを動作させることにより、ドアの解錠あるいは施錠が瞬時におこなわれ、その便利さにより普及が拡大している。ドアの解錠／施錠の他に自動車の始動認証としても使用されている。なお、本発明の明細書記載中の低周波とは、ＬＦ（Low Frequency：長波）を中心として、ＶＬＦ（Vary Low Frequency：超長波）およびＭＦ（Middle
Frequency：中波）も含むものである。 By operating the switch provided on the door for the target door of the person carrying the authentication electronic key, the door can be unlocked or locked instantly, and its convenience has expanded. Yes. In addition to door unlocking / locking, it is also used as a vehicle start-up certification. Note that the low frequency in the description of the present invention refers to VLF (Vary Low Frequency) and MF (Middle) centered on LF (Low Frequency).
(Frequency: medium wave) is also included.

認証用電子キーに内蔵される低周波信号の受信アンテナは、軟磁性コアに巻線を施したコイルアンテナが主に使用されている。   As a low-frequency signal receiving antenna built in the authentication electronic key, a coil antenna in which a soft magnetic core is wound is mainly used.

一般にアンテナには指向性が存在し、アンテナの向き（方向）により本来あるべき性能を得られない場合がある。そのため、認証用電子キーに内蔵する低周波信号の受信アンテナは、水平方向に対応したＸ軸とＹ軸のコイルアンテナと、垂直方向のＺ軸のコイルアンテナを組み合わせ、３軸方向に対応したコイルアンテナを形成して、指向性の影響を低減した受信アンテナが使用されている。   In general, antennas have directivity, and there are cases in which the desired performance cannot be obtained depending on the direction (direction) of the antenna. For this reason, the low-frequency signal reception antenna built in the authentication electronic key is a combination of a X-axis and Y-axis coil antenna corresponding to the horizontal direction and a Z-axis coil antenna corresponding to the vertical direction, and a coil corresponding to the three-axis direction. A receiving antenna is used in which an antenna is formed to reduce the influence of directivity.

従来の低周波用３軸受信アンテナについて、図を用いて説明する。図４はひとつの軟磁性コアに対してＸ軸，Ｙ軸，Ｚ軸のコイルアンテナを設けた３軸受信アンテナの正面図および平面図である。ひとつの軟磁性コア１０１にＸ軸コイル１０２，Ｙ軸コイル１０３，Ｚ軸コイル１０４が設けられ、３軸受信アンテナを構成した。軟磁性コア１０１には、各コイル１０２，１０３、１０４が接触干渉することがないように、軟磁性コア１０１に各コイル用のスリット状の巻枠が施されている。（特許文献１）   A conventional low-frequency three-axis receiving antenna will be described with reference to the drawings. FIG. 4 is a front view and a plan view of a three-axis receiving antenna in which X-axis, Y-axis, and Z-axis coil antennas are provided for one soft magnetic core. One soft magnetic core 101 is provided with an X-axis coil 102, a Y-axis coil 103, and a Z-axis coil 104 to constitute a three-axis receiving antenna. The soft magnetic core 101 is provided with a slit-like winding frame for each coil so that the coils 102, 103, and 104 do not interfere with each other. (Patent Document 1)

図５は複数の軟磁性コアを使用して、Ｘ軸，Ｙ軸，Ｚ軸のコイルアンテナを設けた３軸受信アンテナの平面図である。直状の軟磁性コア１０６と、それに巻回するコイル１０７からなる１軸コイルアンテナを、十字状に重ねてそれぞれがＸ軸コイルアンテナ１０８とＹ軸コイルアンテナ１０９となり、前記十字状に重なるＸ軸コイルアンテナ１０８とＹ軸コイルアンテナ１０９を内包として囲むボビン１１１には、点線で示すＺ軸コイルアンテナ１１０を構成するコイルが巻回する。（特許文献２）   FIG. 5 is a plan view of a three-axis receiving antenna using a plurality of soft magnetic cores and provided with X-axis, Y-axis, and Z-axis coil antennas. A uniaxial coil antenna composed of a straight soft magnetic core 106 and a coil 107 wound thereon is overlapped in a cross shape to form an X axis coil antenna 108 and a Y axis coil antenna 109, respectively, and the X axis is overlapped in the cross shape. A coil constituting the Z-axis coil antenna 110 indicated by a dotted line is wound around a bobbin 111 that surrounds the coil antenna 108 and the Y-axis coil antenna 109. (Patent Document 2)

特開２００４−０１５１６８号公報JP 2004-015168 A 特開２００７−１５１１５４号公報JP 2007-151154 A

人が携帯する電子キーは、薄く，小さなものが好まれ、そのために電子キーに内蔵する受信アンテナに要求される特長も、薄型，小型，軽量が挙げられ、また電子キーの落下に対する落下衝撃強度も必要とされた。   Electronic keys carried by humans are thin and small, and the characteristics required for the reception antenna built into the electronic key are also thin, small, and lightweight, and the drop impact strength against dropping of the electronic key Was also needed.

図４に示した３軸受信アンテナでは、薄型に対応するために、軟磁性コア１０１の各肉厚を薄くすればよいが、強度の劣化が著しく、落下衝撃に対して軟磁性コア１０１が破損する問題を発生させた。この問題を解決する方法として、図４に示した軟磁性コア１０１およびコイル１０２，１０３，１０４全体を樹脂モールドして、落下衝撃に対して軟磁性コア１０１の破損を防ぐ方法もあるが、モールド材である樹脂の重量により、軽量化が阻害されていた。   In the triaxial receiving antenna shown in FIG. 4, each thickness of the soft magnetic core 101 may be reduced in order to cope with a thin shape. However, the strength is greatly deteriorated, and the soft magnetic core 101 is damaged due to a drop impact. Caused a problem. As a method for solving this problem, there is a method in which the entire soft magnetic core 101 and coils 102, 103, and 104 shown in FIG. 4 are resin-molded to prevent the soft magnetic core 101 from being damaged by a drop impact. The weight reduction was hindered by the weight of the resin as the material.

図５に示した３軸受信アンテナは、水平２方向のＸ軸およびＹ軸コイルアンテナ１０８，１０９が、十字状に重合して構成されるため、薄型化は困難であった。また、各コイルアンテナ１０８，１０９，１１０のコイル端末を端子１１２へ配線接続する作業は、大変小さな空間でおこなうため、コイル端末の引きまわし，接続作業性が大変悪いものであった。   The three-axis receiving antenna shown in FIG. 5 is difficult to reduce in thickness because the X-axis and Y-axis coil antennas 108 and 109 in two horizontal directions are superposed in a cross shape. In addition, since the work of wiring connecting the coil terminals of the coil antennas 108, 109, and 110 to the terminals 112 is performed in a very small space, the coil terminals are not drawn and connected easily.

本発明は、上記問題を鑑み、２ｍｍ以下の薄型で、軽量、落下衝撃に対する強度に優れた低周波用３軸受信アンテナの提供を目的とした。   In view of the above problems, an object of the present invention is to provide a low-frequency three-axis receiving antenna having a thickness of 2 mm or less, a light weight, and excellent strength against a drop impact.

本発明は、認証情報を含む電磁波を受信する水平２方向（Ｘ軸，Ｙ軸）および垂直方向（Ｚ軸）のコイルアンテナを有する低周波用３軸受信アンテナにおいて、
Ｘ軸コイルアンテナとＹ軸コイルアンテナは、薄状アモルファスの積層体からなる直状の軟磁性コアに巻線を施した１軸のコイルアンテナからなり、該１軸コイルアンテナは、軟磁性コアのほぼ中央に設けた非巻線部によりコイルが分割巻にされ、Ｚ軸コイルアンテナを外周に巻回設置するボビンの内方空間で十字状に組み合い、Ｘ軸コイルアンテナとＹ軸コイルアンテナとなる１軸コイルアンテナは、各軟磁性コアの非巻線部を接触重合させて十字状にボビンに組み合うことを特徴とする低周波用３軸受信アンテナである。 The present invention provides a low-frequency three-axis receiving antenna having coil antennas in two horizontal directions (X-axis and Y-axis) and vertical direction (Z-axis) that receive electromagnetic waves including authentication information.
The X-axis coil antenna and the Y-axis coil antenna are composed of a single-axis coil antenna in which a winding is applied to a straight soft magnetic core made of a thin amorphous laminate, and the single-axis coil antenna is composed of a soft magnetic core. The coil is divided into windings by a non-winding portion provided at substantially the center, and the Z-axis coil antenna and the Y-axis coil antenna are combined in a cross shape in the inner space of the bobbin where the Z-axis coil antenna is wound around the outer periphery. The single-axis coil antenna is a low-frequency three-axis receiving antenna characterized in that the non-winding portions of the soft magnetic cores are contact-polymerized and assembled to a bobbin in a cross shape.

また本発明は、薄状アモルファスの積層体からなる直状の軟磁性コアは、インサート成形による樹脂片が、軟磁性コアの片側平坦面の中央および両端に設けられ、軟磁性コア中央の樹脂片は、分割巻コイルの導出溝を有すと伴に、当該樹脂片の反対面コア部分に非巻線部を具備させ、また、軟磁性コア両端の樹脂片は、半楕円の切欠けを有す端子を固時することを特徴とする上記低周波用３軸受信アンテナである。   Further, according to the present invention, a straight soft magnetic core made of a thin amorphous laminate has resin pieces formed by insert molding provided at the center and both ends of one side flat surface of the soft magnetic core. In addition to having a lead-out groove for the split winding coil, the opposite core portion of the resin piece is provided with a non-winding portion, and the resin pieces at both ends of the soft magnetic core have semi-elliptical notches. The low-frequency triaxial receiving antenna is characterized in that the terminal is fixed.

また、Ｚ軸コイルアンテナを設けるボビンは、内方空間に設けられた立設端子が、Ｘ軸コイルアンテナとＹ軸コイルアンテナを構成する１軸コイルアンテナの両端に位置する端子の端子孔あるいは端子切欠けに挿入して、電気的接続がおこなわれることを特徴とする上記いずれかに記載の低周波用３軸受信アンテナ。   In addition, the bobbin provided with the Z-axis coil antenna has terminal holes or terminals of terminals located at both ends of the uniaxial coil antenna that constitutes the X-axis coil antenna and the Y-axis coil antenna with the standing terminals provided in the inner space. The triaxial receiving antenna for low frequency according to any one of the above, wherein the antenna is electrically connected by being inserted into the notch.

本発明は、低周波用３軸受信アンテナの薄型化を可能とし、該低周波用３軸受信アンテナを内蔵する認証用電子キーの薄型化を可能とするものである。   The present invention makes it possible to reduce the thickness of the low-frequency three-axis receiving antenna, and to reduce the thickness of the authentication electronic key incorporating the low-frequency three-axis receiving antenna.

図を示しながら本発明の実施形態を説明する。
図１は、本発明の低周波用３軸受信アンテナの実施形態を示す分解斜視図である。図２は本発明の低周波用３軸受信アンテナの別の実施形態を示す分解斜視図である。図３は、本発明の低周波用３軸受信アンテナの別の形態を示す図３の１軸コイルアンテナに用いる樹脂片付コアの作製方法を示す図である。 Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view showing an embodiment of a low-frequency three-axis receiving antenna according to the present invention. FIG. 2 is an exploded perspective view showing another embodiment of the low-frequency three-axis receiving antenna of the present invention. FIG. 3 is a view showing a method for producing a resin piece core used in the single-axis coil antenna of FIG. 3 showing another embodiment of the low-frequency triaxial receiving antenna of the present invention.

本発明の低周波用３軸受信アンテナは、１軸コイルアンテナ２１，２２からなるＸ軸コイルアンテナ，Ｙ軸コイルアンテナと、回路接続端子２７，２８を有するボビン２４に巻回設置するＺ軸コイルアンテナ２３と、各コイルアンテナ２１，２２，２３を覆い、ボビン２４と組み合うカバー２９より構成する。   The low-frequency three-axis receiving antenna of the present invention is a Z-axis coil that is wound around a bobbin 24 having an X-axis coil antenna, a Y-axis coil antenna, and circuit connection terminals 27 and 28. It comprises an antenna 23 and a cover 29 that covers the coil antennas 21, 22, and 23 and is combined with the bobbin 24.

１軸コイルアンテナ２１は、薄状アモルファスを積層してなる直状の軟磁性コア１１に、コイル１２ａおよびコイル１２ｂが巻回し、該コイル１２ａ，１２ｂは同一の導体からなり、軟磁性コア１１の中央部分に非巻線部１５を設ける分割巻としている。   In the uniaxial coil antenna 21, a coil 12a and a coil 12b are wound around a straight soft magnetic core 11 formed by laminating thin amorphous layers, and the coils 12a and 12b are made of the same conductor. It is set as the division | segmentation winding which provides the non-winding part 15 in the center part.

また、軟磁性コア１１の平坦面両端に、接続端子１４ａあるいは１４ｂを有する端子板１３ａ，１３ｂを取り付けて、前記コイル１２ａ，１２ｂの端末接続およびボビン２４内方の立設端子２５と接続する。   Further, terminal plates 13a and 13b having connection terminals 14a or 14b are attached to both ends of the flat surface of the soft magnetic core 11, and connected to the terminal connection of the coils 12a and 12b and the standing terminal 25 inside the bobbin 24.

１軸コイルアンテナ２２も１軸コイルアンテナ２１と同様に、薄状アモルファスを積層してなる直状の軟磁性コア１６に、コイル１７ａおよびコイル１７ｂが巻回され、該コイル１７ａ，１７ｂは同一の導体を使用して、軟磁性コア１６の中央部分に非巻線部２０を設ける分割巻とし、軟磁性コア１６の平坦面両端に、接続端子１９ａあるいは１９ｂを有する端子板１８ａ，１８ｂを取り付けて、コイル１７ａ，１７ｂの端末接続およびボビン２４内方の立設端子２６と接続する。   Similarly to the single-axis coil antenna 21, the single-axis coil antenna 22 has a coil 17a and a coil 17b wound around a straight soft magnetic core 16 formed by laminating thin amorphous layers, and the coils 17a and 17b are the same. Using a conductor, a split winding is provided in which the non-winding portion 20 is provided in the center portion of the soft magnetic core 16, and terminal plates 18a and 18b having connection terminals 19a or 19b are attached to both ends of the flat surface of the soft magnetic core 16. The terminals 17 of the coils 17a and 17b are connected to the upright terminal 26 inside the bobbin 24.

ボビン２４に前記１軸コイルアンテナ２１および１軸コイルアンテナ２２を組み込む際に、１軸コイルアンテナ２１と１軸コイルアンテナ２２は、軟磁性コア１１の非巻線部１５と軟磁性コア１６の非巻線部２０を接触させて重ね合わせ、十字状にボビン２４の内方に組み込む。   When the uniaxial coil antenna 21 and the uniaxial coil antenna 22 are incorporated into the bobbin 24, the uniaxial coil antenna 21 and the uniaxial coil antenna 22 are not connected to the non-winding portion 15 of the soft magnetic core 11 and the non-magnetic core 16. The winding portions 20 are brought into contact with each other and overlapped, and assembled into the inside of the bobbin 24 in a cross shape.

１軸コイルアンテナ２１と１軸コイルアンテナ２２は、ボビン２４に具備された回路接続端子２７，２８の延長部分である立設端子２５，２６が、１軸コイルアンテナ２１，２２の両端に位置する端子板１３ａ，１３ｂ，１８ａ，１８ｂの接続端子１４ａ，１４ｂ，１９ａ，１９ｂの孔部分に挿入，接続する。   In the uniaxial coil antenna 21 and the uniaxial coil antenna 22, standing terminals 25 and 26 which are extensions of circuit connection terminals 27 and 28 provided on the bobbin 24 are located at both ends of the uniaxial coil antennas 21 and 22. The terminal plates 13a, 13b, 18a, and 18b are inserted and connected to the hole portions of the connection terminals 14a, 14b, 19a, and 19b.

１軸コイルアンテナ２１，２２が組み込まれ、各端子同士を接続した後、カバー２９をボビン２４と組み合わせて本発明の３軸受信アンテナの完成となる。   After the uniaxial coil antennas 21 and 22 are incorporated and the terminals are connected to each other, the cover 29 is combined with the bobbin 24 to complete the triaxial receiving antenna of the present invention.

本発明の３軸受信アンテナは、水平２方向のＸ軸およびＹ軸コイルアンテナを直状の軟磁性コア１１および１６に設けた非巻線部１５、２０を重合部分として十字状に組み合わせるため、特許文献２に開示された十字状に組み合うコイルアンテナに比べて、重なり合う巻線部分の寸法を削減することができ、３軸受信アンテナの高さを薄型とすることができる。   In the triaxial receiving antenna of the present invention, the X-axis and Y-axis coil antennas in the two horizontal directions are combined in a cross shape with the non-winding portions 15 and 20 provided on the straight soft magnetic cores 11 and 16 as overlapping portions, Compared with the coil antenna combined in a cross shape disclosed in Patent Document 2, the dimensions of the overlapping winding portions can be reduced, and the height of the three-axis receiving antenna can be reduced.

また、各コイル端末の接続は、ボビン２４に巻回するＺ軸コイルアンテナ２３の端末は、１軸コイルアンテナ２１，２２の組み込み前に所定の端子に接続すればよく、また、１軸コイルアンテナ２１，２２はボビン２４組み込み前に、各コイル端末を接続端子１４ａ，１４ｂ，１９ａ，１９ｂに接続しておき、ボビン２４へ組み込み後は、接続が容易な形態であり、作業性が向上する。   In addition, each coil terminal can be connected by connecting the terminal of the Z-axis coil antenna 23 wound around the bobbin 24 to a predetermined terminal before assembling the single-axis coil antennas 21 and 22. Before the bobbin 24 is assembled, the coil terminals 21 and 22 are connected to the connection terminals 14a, 14b, 19a, and 19b, and after being assembled into the bobbin 24, the connection is easy and workability is improved.

薄状アモルファスを積層してなる直状の軟磁性コアは、単枚のアモルファスを積層、あるいは、あらかじめ積層したアモルファス積層体から必要な形状を作製すればよく、プレス打抜，エッチング等の工法により得られる。   A straight soft magnetic core made by laminating thin amorphous layers can be formed by laminating a single amorphous layer or by preparing the required shape from an amorphous layered body that has been laminated in advance. can get.

また、アモルファスの材質については、Ｃｏ系，Ｆｅ系など特に限定するものではないが、防錆に優れるＣｏ系アモルファスが好ましい。   Further, the amorphous material is not particularly limited, such as Co-based and Fe-based materials, but Co-based amorphous having excellent rust prevention is preferable.

さらに、アモルファス単枚の薄厚は、薄いほど軟磁気特性が向上する傾向にあるが、一方、積層による実効体積の低下および強度低下などの実用上の問題が発生するため、アモルファスの薄厚は、１０μｍ〜２０μｍが好ましい。   Further, the thinner the single amorphous sheet, the more the soft magnetic properties tend to improve. On the other hand, practical problems such as a decrease in effective volume and a decrease in strength due to lamination occur. ˜20 μm is preferred.

また、直状の軟磁性コア１１，１６は、その表面に薄膜状絶縁をおこない、巻回するコイルの絶縁被膜破壊，断線を防止した。なお、薄膜状絶縁はテープ，樹脂コートで形成することができ、薄状アモルファスを積層する際に使用する樹脂であってもよい。   In addition, the straight soft magnetic cores 11 and 16 provided thin-film insulation on the surfaces thereof to prevent breakage and disconnection of the insulation film of the coil to be wound. The thin film insulation can be formed by a tape or a resin coat, and may be a resin used when laminating thin amorphous films.

図１および図２に示すように、本発明の低周波用３軸受信アンテナは、１軸コイルアンテナの巻芯である軟磁性コアを接触重合させることにより、従来のコイル同士を重ねるものに比べ、コイルの厚さ分を削減でき、薄型化を可能とした。また、各１軸コイルアンテナ２１，２２に端子板１５を設けたことにより、コイル端末の接続およびボビン２４の端子との接続２５，２６を容易とし、薄型および小型化における作業性の阻害を防止することができる。   As shown in FIGS. 1 and 2, the low-frequency three-axis receiving antenna of the present invention is compared with a conventional one in which the coils are overlapped by contact-polymerizing the soft magnetic core that is the core of the single-axis coil antenna. The thickness of the coil can be reduced and the thickness can be reduced. In addition, the provision of the terminal plate 15 for each single-axis coil antenna 21, 22 facilitates the connection of the coil terminal and the connection 25, 26 with the terminal of the bobbin 24, and prevents obstruction of workability in thinning and miniaturization. can do.

図２の１軸コイルアンテナ３１は、薄状アモルファスの積層体からなる直状の軟磁性コア３２に分割巻のコイル３３と、両端の接続端子３６と端子固定樹脂片３５、そして軟磁性コア３２の中央でコイル３３を分割する中央樹脂片３４より構成する。   The uniaxial coil antenna 31 shown in FIG. 2 includes a coil 33 divided into a straight soft magnetic core 32 made of a thin amorphous laminate, connection terminals 36 and terminal fixing resin pieces 35 at both ends, and a soft magnetic core 32. It is comprised from the center resin piece 34 which divides | segments the coil 33 in the center.

上記１軸コイルアンテナ３１は、図３に示すインサート成型による樹脂片付コアを使用したものである。図３は、樹脂片付コアの工程毎の仕様を簡略表示したものであり、平面図および側面図を示している。   The single-axis coil antenna 31 uses a core with a resin piece by insert molding shown in FIG. FIG. 3 is a simplified representation of the specifications for each step of the core with a resin piece, and shows a plan view and a side view.

図３（ａ）は、平行するリードフレーム５１には、楕円孔５２と円形孔の係止部５３が交互に設けられている。   In FIG. 3 (a), parallel lead frames 51 are provided with elliptical holes 52 and circular hole engaging portions 53 alternately.

図３（ｂ）は、平行するリードフレーム５１に対して、薄状アモルファスの積層体である直状の軟磁性コア３２を配置した。軟磁性コア３２は、係止部５３上に、そして楕円孔５２間の中央に位置させる。   In FIG. 3 (b), a straight soft magnetic core 32, which is a thin amorphous laminate, is arranged on parallel lead frames 51. The soft magnetic core 32 is positioned on the locking portion 53 and in the center between the elliptical holes 52.

図３（ｃ）は、インサート成型後の姿であり、軟磁性コア３２に対して、両端の端子固定樹脂片３５と中央樹脂片３４が、軟磁性コア３２の一平坦面を露出させて設けられ、中央樹脂片３４は直状軟磁性コア３２の中央でコイルの非巻線部３７を形成し、図２に示すコイル引回溝３８を有している。端子固定樹脂片３５は、軟磁性コア３２にリードフレーム５１を固持させている。   FIG. 3C shows the shape after insert molding. The soft magnetic core 32 is provided with terminal fixing resin pieces 35 and central resin pieces 34 at both ends so as to expose one flat surface of the soft magnetic core 32. The central resin piece 34 forms a non-winding portion 37 of the coil at the center of the straight soft magnetic core 32 and has a coil routing groove 38 shown in FIG. The terminal fixing resin piece 35 holds the lead frame 51 on the soft magnetic core 32.

図３（ｄ）は、連続して連なる図３（ｃ）よりリードフレーム５１の楕円孔５２を切断箇所として、１軸コイルアンテナ用樹脂片付コアを得るものであり、切断箇所の前記リードフレーム５１が１軸コイルアンテナの接続端子３６となる。   FIG. 3D shows a core with a resin piece for a single-axis coil antenna obtained by cutting the elliptical hole 52 of the lead frame 51 from the continuously connected FIG. 3C, and the lead frame at the cut portion. 51 becomes the connection terminal 36 of a 1 axis coil antenna.

図３において、リードフレーム５１に設ける係止部５３は、円形孔以外の孔形状でもよく、また孔以外の切欠形状でもよい。また、リードフレーム５１に設ける楕円孔６２も孔形状を限定するものではない。   In FIG. 3, the locking portion 53 provided on the lead frame 51 may have a hole shape other than a circular hole, or may have a notch shape other than a hole. Further, the elliptical hole 62 provided in the lead frame 51 is not limited to the hole shape.

図３により作製された１軸コイルアンテナ用樹脂片付コアにコイルを設けたものが、図２に示す１軸コイルアンテナ３１であり、Ｚ軸コイルアンテナ４２が施されたボビン４１に既に組み込まれた１軸コイルアンテナ３１が示すように、立設端子４３が接続端子３６の半楕円溝に挿入して接続する。   A single-axis coil antenna 31 shown in FIG. 2 is obtained by providing a coil on a core with a resin piece for a single-axis coil antenna manufactured according to FIG. 3 and is already incorporated in a bobbin 41 provided with a Z-axis coil antenna 42. As shown by the single-axis coil antenna 31, the standing terminal 43 is inserted into the semi-elliptical groove of the connection terminal 36 and connected.

また、ボビン４１に最初に組み込む１軸コイルアンテナ３１は、非巻線部３７のコア露出部を上面とし、上方の１軸コイルアンテナ３１は下面に非巻線部３７のコア露出部を向け、非巻線部３７のコア露出同士を重合させて、ボビン４１に十字状に組み合い収納する。   In addition, the uniaxial coil antenna 31 that is first incorporated in the bobbin 41 has the core exposed portion of the non-winding portion 37 as the upper surface, and the upper uniaxial coil antenna 31 faces the core exposed portion of the non-winding portion 37 toward the lower surface. The exposed cores of the non-winding portion 37 are overlapped and stored in the bobbin 41 in a cross shape.

図２および図３の形態においても、Ｘ軸およびＹ軸のアンテナコイルとなる１軸コイルアンテナ３１が十字状に組み合い垂直方向の寸法を最小とすることができる。また、図３に示すインサート成型による１軸コイルアンテナ用樹脂片付コアを用いることで、図１で示した本発明の実施形態で示す１軸コイルアンテナ２１，２２より、樹脂片付コアを用いた１軸コイルアンテナ３１の寸法精度が高く、作業性を向上させるものである。   2 and 3 also, the single-axis coil antenna 31 serving as the X-axis and Y-axis antenna coils can be combined in a cross shape to minimize the vertical dimension. Moreover, by using the core with a resin piece for a single-axis coil antenna by insert molding shown in FIG. 3, the core with a resin piece is used from the single-axis coil antennas 21 and 22 shown in the embodiment of the present invention shown in FIG. The uniaxial coil antenna 31 has a high dimensional accuracy and improves workability.

また、１軸コイルアンテナ３１の接続端子３６に対して、ボビン４１内方の各立設端子４３が、接続端子３６の半楕円溝に係入することにより、位置決めができ、ハンダあるいは溶接により、容易な接続作業を可能とした。   In addition, each standing terminal 43 inside the bobbin 41 can be positioned with respect to the connection terminal 36 of the single-axis coil antenna 31 by engaging with the semi-elliptical groove of the connection terminal 36, and by soldering or welding, Easy connection work was made possible.

実際に図１で説明した本発明の低周波用３軸受信アンテナを作製した結果を以下に示す。   The results of actually producing the low-frequency three-axis receiving antenna of the present invention described in FIG. 1 are shown below.

薄状アモルファスからなる直状の軟磁性コアは、長さ１０ｍｍ、幅１．５ｍｍ、高さ（積層方向）０．３ｍｍとして、コイル１２ａと１２ｂ、および、コイル１７ａと１７ｂは、０．０３５ｍｍφ−１２００ターンを、２．０ｍｍの非巻線部１５，２０により２分割巻をおこない、１軸コイルアンテナ２１，２２を作製した。   The straight soft magnetic core made of thin amorphous has a length of 10 mm, a width of 1.5 mm, and a height (stacking direction) of 0.3 mm. The coils 12 a and 12 b and the coils 17 a and 17 b are 0.035 mmφ− 1200 turns were divided into two by the non-winding portions 15 and 20 of 2.0 mm, and the uniaxial coil antennas 21 and 22 were produced.

上記、１軸コイルアンテナ２１，２２の非巻線部１５，２０を重合部分として十字状に重ね合わせた時の形状寸法は、１０ｍｍ−１０ｍｍ、高さ１．４ｍｍと大変薄型の水平２方向のコイルアンテナとなった。   When the non-winding portions 15 and 20 of the uniaxial coil antennas 21 and 22 are overlapped in a cross shape as overlapping portions, the shape dimensions are 10 mm-10 mm and the height is 1.4 mm, which are very thin in two horizontal directions. It became a coil antenna.

また、Ｚ軸コイルアンテナ２３が巻回するボビン２４，カバー２９は、耐熱に優れ、高強度の液晶ポリマー樹脂により、各部分を薄い肉厚として形成し、ボビン２４に上記より作製した１軸コイルアンテナ２１，２２を収納，端子接続した後、カバー２９を組み合わせた。Ｚ軸コイルアンテナ１４は、０．０４５ｍｍφを７７０ターンとした。   Further, the bobbin 24 and the cover 29 around which the Z-axis coil antenna 23 is wound are excellent in heat resistance, and each part is formed with a thin wall thickness with a high-strength liquid crystal polymer resin. After storing the antennas 21 and 22 and connecting the terminals, the cover 29 was combined. The Z-axis coil antenna 14 has 0.045 mmφ and 770 turns.

完成した本発明の３軸受信アンテナは、取付け面積寸法：１４ｍｍ−１４ｍｍ、厚さ（高さ）：２．０ｍｍ、重量：約１．３ｇと、大変薄く、しかも軽量で小型の製品を作製することができた。   The completed three-axis receiving antenna of the present invention has a mounting area size of 14 mm to 14 mm, a thickness (height) of 2.0 mm, a weight of about 1.3 g, and is very thin and lightweight and produces a small product. I was able to.

また、各コイルアンテナの電気的特性は、Ｘ軸およびＹ軸コイルアンテナのインダクタンスおよびＱは、９．２ｍＨと４４、Ｚ軸コイルアンテナのインダクタンスとＱは、９．１ｍＨと２０を得ることができた。   Also, the electrical characteristics of each coil antenna can be obtained as 9.2 mH and 44 for the X-axis and Y-axis coil antennas and Q, and 9.1 mH and 20 for the Z-axis coil antenna. It was.

本発明の低周波用３軸受信アンテナの実施形態を示す分解斜視図である。It is a disassembled perspective view which shows embodiment of the triaxial receiving antenna for low frequencies of this invention. 本発明の低周波用３軸受信アンテナの別の実施形態を示す分解斜視図である。It is a disassembled perspective view which shows another embodiment of the triaxial receiving antenna for low frequencies of this invention. 本発明の低周波用３軸受信アンテナの別の形態を示す図３の１軸コイルアンテナに用いる樹脂片付コアの作製方法を示す図である。It is a figure which shows the preparation methods of the core with a resin piece used for the uniaxial coil antenna of FIG. 3 which shows another form of the low frequency triaxial receiving antenna of this invention. 従来の低周波用３軸受信アンテナの正面図および平面図である。It is the front view and top view of the conventional triaxial receiving antenna for low frequencies. 別の従来の低周波用３軸受信アンテナの平面図である。It is a top view of another conventional triaxial receiving antenna for low frequencies.

符号の説明Explanation of symbols

１１，１６：軟磁性コア
１２ａ，１２ｂ，１７ａ，１７ｂ：コイル
１３ａ，１３ｂ，１８ａ，１８ｂ：端子板
１４ａ，１４ｂ，１９ａ，１９ｂ：接続端子
１５，２０：非巻線部
２１，２２：１軸コイルアンテナ
２３：Ｚ軸コイルアンテナ
２４：ボビン
２５，２６：立設端子
２７，２８：回路接続端子
２９：カバー 11, 16: Soft magnetic cores 12a, 12b, 17a, 17b: Coils 13a, 13b, 18a, 18b: Terminal plates 14a, 14b, 19a, 19b: Connection terminals 15, 20: Non-winding portions 21, 22: 1 axis Coil antenna 23: Z-axis coil antenna 24: Bobbin 25, 26: Standing terminal 27, 28: Circuit connection terminal 29: Cover

Claims (3)

認証情報を含む電磁波を受信する水平２方向（Ｘ軸，Ｙ軸）および垂直方向（Ｚ軸）のコイルアンテナを有する低周波用３軸受信アンテナにおいて、
Ｘ軸コイルアンテナとＹ軸コイルアンテナは、薄状アモルファスの積層体からなる直状の軟磁性コアに巻線を施した１軸のコイルアンテナからなり、該１軸コイルアンテナは、軟磁性コアのほぼ中央に設けた非巻線部によりコイルが分割巻にされ、Ｚ軸コイルアンテナを外周に巻回設置するボビンの内方空間で十字状に組み合い、Ｘ軸コイルアンテナとＹ軸コイルアンテナとなる１軸コイルアンテナは、各軟磁性コアの非巻線部を接触重合させて十字状にボビンに組み合うことを特徴とする低周波用３軸受信アンテナ。 In a low-frequency three-axis receiving antenna having coil antennas in two horizontal directions (X-axis and Y-axis) and vertical direction (Z-axis) for receiving electromagnetic waves including authentication information,
The X-axis coil antenna and the Y-axis coil antenna are composed of a single-axis coil antenna in which a winding is applied to a straight soft magnetic core made of a thin amorphous laminate, and the single-axis coil antenna is composed of a soft magnetic core. The coil is divided into windings by a non-winding portion provided at substantially the center, and the Z-axis coil antenna and the Y-axis coil antenna are combined in a cross shape in the inner space of the bobbin where the Z-axis coil antenna is wound around the outer periphery. The single-axis coil antenna is a low-frequency three-axis receiving antenna characterized in that the non-winding portion of each soft magnetic core is contact-polymerized and assembled to a bobbin in a cross shape. 薄状アモルファスの積層体からなる直状の軟磁性コアは、インサート成形による樹脂片が、軟磁性コアの片側平坦面の中央および両端に設けられ、軟磁性コア中央の樹脂片は、分割巻コイルの導出溝を有すと伴に、当該樹脂片の反対面コア部分に非巻線部を具備させ、また、軟磁性コア両端の樹脂片は、半楕円の切欠けを有す端子を固時することを特徴とする請求項１記載の低周波用３軸受信アンテナ。   A straight soft magnetic core made of a thin amorphous laminate has insert-molded resin pieces provided at the center and both ends of a flat surface on one side of the soft magnetic core. In addition to having a lead-out groove, the opposite core part of the resin piece is provided with a non-winding portion, and the resin pieces on both ends of the soft magnetic core are fixed to terminals having semi-elliptical notches. The low-frequency triaxial receiving antenna according to claim 1. Ｚ軸コイルアンテナを設けるボビンは、内方空間に設けられた立設端子が、Ｘ軸コイルアンテナとＹ軸コイルアンテナを構成する１軸コイルアンテナの両端に位置する端子の端子孔あるいは端子切欠けに挿入して、電気的接続がおこなわれることを特徴とする請求項１および請求項２記載の低周波用３軸受信アンテナ。   In the bobbin provided with the Z-axis coil antenna, the standing terminals provided in the inner space are terminal holes or terminal notches of terminals located at both ends of the single-axis coil antenna constituting the X-axis coil antenna and the Y-axis coil antenna. The low-frequency three-axis receiving antenna according to claim 1, wherein electrical connection is made by inserting the antenna into the low-frequency three-axis receiving antenna.
JP2008163944A 2008-06-24 2008-06-24 Low-frequency three-axis reception antenna Pending JP2010010730A (en)

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JP2017036854A (en) * 2015-08-07 2017-02-16 日油株式会社 Antenna for radio detonator, radio detonator, and radio detonation system
JP2017098936A (en) * 2015-11-18 2017-06-01 Ｎｅｃトーキン株式会社 Antenna module
JP2017123547A (en) * 2016-01-06 2017-07-13 アルプス電気株式会社 Antenna device and keyless entry device
WO2017183933A1 (en) * 2016-04-21 2017-10-26 주식회사 아모그린텍 Three-axis antenna module and keyless entry system comprising same
WO2017183935A1 (en) * 2016-04-21 2017-10-26 주식회사 아모그린텍 Three-axis low-frequency antenna module and keyless entry system comprising same

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JPH06251970A (en) * 1993-02-26 1994-09-09 Tokin Corp Manufacture of chip inductor
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JP2004088139A (en) * 2002-06-27 2004-03-18 Tokai Rika Co Ltd Multiaxial chip antenna and three-axis antenna chip

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017036854A (en) * 2015-08-07 2017-02-16 日油株式会社 Antenna for radio detonator, radio detonator, and radio detonation system
JP2017098936A (en) * 2015-11-18 2017-06-01 Ｎｅｃトーキン株式会社 Antenna module
JP2017123547A (en) * 2016-01-06 2017-07-13 アルプス電気株式会社 Antenna device and keyless entry device
WO2017183933A1 (en) * 2016-04-21 2017-10-26 주식회사 아모그린텍 Three-axis antenna module and keyless entry system comprising same
WO2017183935A1 (en) * 2016-04-21 2017-10-26 주식회사 아모그린텍 Three-axis low-frequency antenna module and keyless entry system comprising same

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