JP5135736B2 - High frequency feeder - Google Patents

High frequency feeder Download PDF

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JP5135736B2
JP5135736B2 JP2006230447A JP2006230447A JP5135736B2 JP 5135736 B2 JP5135736 B2 JP 5135736B2 JP 2006230447 A JP2006230447 A JP 2006230447A JP 2006230447 A JP2006230447 A JP 2006230447A JP 5135736 B2 JP5135736 B2 JP 5135736B2
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conductive wire
conductive
hollow
line
power supply
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JP2008053143A (en
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昭宏 石橋
康 二畠
幸彦 岡村
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Panasonic Corp
Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Description

本願発明は、高周波で生ずる表皮効果による高周波損失を低減することができる高周波給電線に関する。   The present invention relates to a high-frequency power supply line that can reduce high-frequency loss due to the skin effect that occurs at high frequencies.

一様の導電率σを有する導電線に交流を通電し、その周波数ωを上げていくと交流電流は導電線の表面近くに集中して流れる表皮効果(skin effect)が生じ、一般に表皮効果の程度は表皮深さ(skin depth)δで表される。そして、表皮深さδは、δ=(2/ωσμ)1/2で表される。ここで、ωは周波数、μは導電線の透磁率を示す。 When an alternating current is applied to a conductive wire having a uniform conductivity σ and the frequency ω is increased, a skin effect occurs in which the alternating current concentrates near the surface of the conductive wire. The degree is expressed by skin depth δ. The skin depth δ is expressed by δ = (2 / ωσμ) 1/2 . Here, ω represents the frequency, and μ represents the magnetic permeability of the conductive wire.

よって、導電線を流れる電流の周波数ωが高くなると、表皮深さδが小さくなり、例えば、断面形状が丸形の導電線においては、中心付近では電気抵抗が増加し、電流が流れにくくなり、その結果導電線全体の電気抵抗が増大することとなる。そこで、表皮深さδ以下の径の導電線を用いることで表皮効果による電気抵抗増加による損失は著しく低減させることができる。   Therefore, when the frequency ω of the current flowing through the conductive wire is increased, the skin depth δ is decreased. For example, in a conductive wire having a round cross-sectional shape, the electrical resistance increases near the center, and the current does not flow easily. As a result, the electrical resistance of the entire conductive wire is increased. Therefore, the loss due to the increase in electrical resistance due to the skin effect can be remarkably reduced by using a conductive wire having a diameter equal to or smaller than the skin depth δ.

従来から、例えば、特開平5−250926号公報(特許文献1)に示されるように、表皮効果の低減を図るために、細分化されたエナメル線を複数本撚り合わせたリッツ線が知られている。このリッツ線は、図6に示すように、中心位置に細分化されたエナメル被覆20を有する導電線10を配置し、その周辺に同様の複数のエナメル被覆20を有する導電線10を配置して構成されている。   Conventionally, as shown in, for example, Japanese Patent Laid-Open No. 5-250926 (Patent Document 1), a litz wire obtained by twisting a plurality of subdivided enamel wires to reduce the skin effect has been known. Yes. As shown in FIG. 6, the litz wire has a conductive wire 10 having an enamel coating 20 subdivided at a central position, and a conductive wire 10 having a plurality of similar enamel coatings 20 is arranged around the conductive wire 10. It is configured.

しかし、細分化されたエナメル線を複数本撚り合わせたリッツ線を用いた高周波用給電線にあっては、リッツ線の各導電線10の径を小さくすることによって、表皮効果の低減を図ることができるが、周波数が大きい場合には、極細の導電線10を作らなければならず、作製が困難であり、又、たとえ極細の単線が作製できても、撚り線にする際の取り扱いが非常に困難である等の不具合があった。   However, in a high-frequency power supply line using a litz wire obtained by twisting a plurality of subdivided enamel wires, the skin effect can be reduced by reducing the diameter of each conductive wire 10 of the litz wire. However, when the frequency is high, it is necessary to make an extremely fine conductive wire 10 and it is difficult to produce it. Even if an extremely fine single wire can be produced, it is very difficult to handle a stranded wire. There were problems such as difficulty.

そこで、従来から、特開平9−008076号公報(特許文献2)に示されるように、中空部を有する中空導電線を用いる高周波用給電線が知られている。この高周波用給電線は、図7に示すように、導電線30の内部に中空部31を構成して内周面33を設けることで、導電線30の外周面32に高周波電流を流すだけでなく導電線30の内周面33にも高周波電流を流すことができ、従来導体として機能していなかった導電線30の内部にも高周波電流を流すことができる。このことによって、導電線30の外径寸法を増大させることなく、高周波電流が流れる有効面積を増加させることができることが知られている。   Therefore, conventionally, as shown in Japanese Patent Application Laid-Open No. 9-008076 (Patent Document 2), a high-frequency feed line using a hollow conductive wire having a hollow portion is known. As shown in FIG. 7, the high-frequency power supply line is configured such that a hollow portion 31 is formed inside the conductive wire 30 and an inner peripheral surface 33 is provided, so that a high-frequency current flows only on the outer peripheral surface 32 of the conductive wire 30. In addition, a high-frequency current can also flow through the inner peripheral surface 33 of the conductive wire 30, and a high-frequency current can also flow through the conductive wire 30 that has not previously functioned as a conductor. As a result, it is known that the effective area through which the high-frequency current flows can be increased without increasing the outer diameter of the conductive wire 30.

ここで、中空導電線30を単線で構成した高周波給電線の場合、例えば、周波数を10kHz、材質が銅であるとすれば、表皮深さδは0.6mmとなる。よって、高周波電流が流れる有効面積として5.5mm2確保する必要がある場合には、単線の中空導電線30で構成される高周波用給電線の径は13.2mmとなる。
特開平5−250926号公報 特開平9−008076号公報
Here, in the case of a high-frequency power supply line in which the hollow conductive wire 30 is a single wire, for example, if the frequency is 10 kHz and the material is copper, the skin depth δ is 0.6 mm. Therefore, when it is necessary to secure 5.5 mm 2 as an effective area through which the high-frequency current flows, the diameter of the high-frequency feed line constituted by the single hollow conductive wire 30 is 13.2 mm.
Japanese Patent Laid-Open No. 5-250926 Japanese Patent Laid-Open No. 9-008076

図8に示すように、中空導電線30を7本で構成した場合、上記と同様に、周波数を10kHz、材質が銅、有効面積が5.5mm2であるとすれば、中空導電線30の径は1.9mmとなり、高周波用給電線の径は5.7mmに周辺の絶縁物を加えた径となる。よって高周波用給電線は単線の中空導電線30で構成するよりも複数の中空導電線30で構成した方が外径を小さくすることができる。 As shown in FIG. 8, when the hollow conductive wire 30 is composed of seven pieces, if the frequency is 10 kHz, the material is copper, and the effective area is 5.5 mm 2 , the hollow conductive wire 30 The diameter is 1.9 mm, and the diameter of the high-frequency power supply line is 5.7 mm plus a peripheral insulator. Accordingly, the outer diameter of the high-frequency power supply line can be made smaller if it is constituted by a plurality of hollow conductive wires 30 than if it is constituted by a single hollow conductive wire 30.

しかし、この高周波用給電線にあっては、中空導電線40を複数で構成する場合、周辺に配置される中空導電線40aは、中心に配置される中空導電線40bに対する基準位置がなく、均等に周辺へ配置することができないため、電流密度分布を均一にすることができず、効果的に表皮効果を低減できないという問題点があった。   However, in this high-frequency power supply line, when a plurality of hollow conductive wires 40 are configured, the hollow conductive wires 40a arranged in the periphery do not have a reference position with respect to the hollow conductive wires 40b arranged in the center, and are equal. However, the current density distribution cannot be made uniform, and the skin effect cannot be effectively reduced.

本願発明は、上記背景技術に鑑みて発明されたものであり、その目的は、複数の導電線を軸中心に均等に配置することによって、電流密度分布を均一にして効率的に表皮効果を低減し、電気抵抗値の増加を低減することができる高周波用給電線を提供することを目的とする。   The present invention was invented in view of the above-mentioned background art, and its purpose is to evenly distribute the current density distribution by efficiently arranging a plurality of conductive wires around the axis, thereby reducing the skin effect efficiently. And it aims at providing the high frequency electric power feeding line which can reduce the increase in an electrical resistance value.

上記課題を解決するために、本願請求項1記載の発明では、一の導電線と一の導電線を中心として周囲に配置された他の導電線とを含む複数の導電線と、絶縁物と、を一体に形成してなる高周波用給電線において、中心に位置する一の導電線の周囲に他の導電線を等
角度に配置する手段を有し、この手段は前記一の導電線と同形状の孔が中心位置に形成され、かつその外周に等角度ピッチで他の導電線が嵌る位置決め溝が複数形成された絶縁物によって構成され、複数の導電線は内部にこの導電線と同軸の一つの中空部をそれぞれ有することを特徴としている。
In order to solve the above-described problem, in the invention according to claim 1 of the present application , a plurality of conductive lines including one conductive line and another conductive line arranged around the one conductive line as a center , an insulator, the in the high-frequency power supply lines formed by integrally formed, have a means for placing at equiangular other conductive wire around one of the conductive wire in the center, the said means and said one conductive line A hole having a shape is formed at the center position, and the outer periphery of the hole is formed of an insulator having a plurality of positioning grooves in which other conductive wires are fitted at equal angular pitches. The plurality of conductive wires are coaxial with the conductive wires. Each has one hollow part .

本願請求項2記載の発明では、上記請求項1記載の高周波用給電線において、中心に位置する一の導電線は周囲に配置された他の導電線より断面肉厚が小さいことを特徴としている。   The invention according to claim 2 of the present application is characterized in that, in the high-frequency power supply line according to claim 1, one conductive wire located in the center has a smaller cross-sectional thickness than other conductive wires arranged around it. .

本願請求項3記載の発明では、上記請求項1記載の高周波用給電線において、導電線の外周面に長手方向へ延設した溝が複数周設されていることを特徴としている。   The invention according to claim 3 of the present application is characterized in that in the high-frequency power supply line according to claim 1, a plurality of grooves extending in the longitudinal direction are provided on the outer peripheral surface of the conductive wire.

本願請求項記載の発明では、上記請求項1から3のいずれか1項に記載の高周波用給電線において、長手方向に突合せ接合された導電線の該突合せ接合部の中空部に両導電線に跨がり且つ導電線の内面に圧接するように嵌合させる接続部材を介して導電線が接続されることを特徴としている。 According to a fourth aspect of the present invention, in the high-frequency power supply line according to any one of the first to third aspects, both conductive wires are provided in the hollow portion of the butt joint portion of the conductive wire butt-joined in the longitudinal direction. straddles and both conductive line via a connecting member to fitted in pressure-contact with the inner surface of the conductive wire is characterized by being connected to.

本願請求項記載の発明では、上記請求項記載の高周波用給電線において、接続部材の両端部に長手方向へ延設したスリットが周設されていることを特徴としている。 The invention according to claim 5 of the present application is characterized in that in the high-frequency power supply line according to claim 4 , slits extending in the longitudinal direction are provided at both ends of the connection member.

本願請求項1記載の発明の高周波用給電線においては、絶縁物の形状によって、一の導電線を中心位置に、他の導電線を中心に対して等角度に、簡単且つ確実に配置することができ、このことによって、当該複数の導電線は軸中心に対して均等に配置され、高周波の電流を流した場合に、電流密度分布が均一になり、表皮効果を効果的に低減でき電流抵抗値を低くすることができる。また特に、導電線の内部に中空部を設けることによって、導電線の内周面にも高周波電流を流すことができるため、導電線の外径寸法を増大させることなく、高周波電流が流れる有効面積を増加させることができ、この導電線に高周波電流を通電した場合に、表皮効果による電流抵抗値増加を低減できる。 In the high frequency power supply line according to the first aspect of the present invention, depending on the shape of the insulator, one conductive line is arranged at the center position, and the other conductive line is arranged at an equal angle with respect to the center, simply and reliably. As a result, the plurality of conductive lines are evenly arranged with respect to the axial center, and when a high frequency current is passed, the current density distribution becomes uniform, and the skin effect can be effectively reduced. The value can be lowered. In particular, by providing a hollow portion inside the conductive wire, a high-frequency current can also flow through the inner peripheral surface of the conductive wire, so the effective area through which the high-frequency current flows without increasing the outer diameter of the conductive wire. When a high-frequency current is passed through the conductive wire, an increase in current resistance value due to the skin effect can be reduced.

本願請求項2記載の発明の高周波用給電線においては、特に、中心に位置する一の導電線の断面積を他の導電線より小さくすることによって、高周波で発生する近接効果が特に強く発生する中心に位置する導電線の電流抵抗値の増加をさらに低減させることができる。   In the high-frequency power supply line according to the second aspect of the present invention, in particular, the proximity effect generated at a high frequency is particularly strongly generated by making the cross-sectional area of one conductive line located at the center smaller than the other conductive lines. An increase in the current resistance value of the conductive wire located at the center can be further reduced.

本願請求項3記載の発明の高周波用給電線においては、特に、導電線の外周に溝を設けることで、導電線の表面積を増やすことができるので、この導電線に高周波電流を通電した場合に、表皮効果による電流抵抗値増加を低減できる。   In the high-frequency power supply line according to the third aspect of the present invention, the surface area of the conductive wire can be increased by providing a groove on the outer periphery of the conductive wire. The increase in current resistance value due to the skin effect can be reduced.

本願請求項記載の発明の高周波用給電線においては、特に、導電線同士を接続する接続部材を用いることによって、容易に導電線同士の接続ができ、加工工数を減らすことができる。 In the high frequency power supply line according to the fourth aspect of the present invention, in particular, by using a connecting member for connecting the conductive wires, the conductive wires can be easily connected to each other, and the number of processing steps can be reduced.

本願請求項記載の発明の高周波用給電線においては、特に、導電線同士を接続する接続部材にスリットを設けることによって、接続部材の径が縮まるように変形することで導電線の中空部への圧入が容易となり、圧入状態においては、接続部材と導電線との接続部分の接圧を安定させることができる。 In the high-frequency power supply line according to the fifth aspect of the present invention, in particular, by providing a slit in the connecting member that connects the conductive wires, the connecting member is deformed so that the diameter of the connecting member is reduced. In the press-fitted state, the contact pressure at the connection portion between the connection member and the conductive wire can be stabilized.

図1〜図3は、本願発明の第1の実施形態である高周波用給電線を示している。図1に示すように、内部に中空部6を有する複数の中空導電線1と、絶縁物2と、を一体に形成してなる高周波用給電線Aにおいて、中心に位置する一の中空導電線1aの周囲に他の中空導電線1bを等角度に配置する手段を有している。当該手段は、絶縁物2の形状によって複数の中空導電線1の位置決めを行うことによって実現されている。また、中心に位置する一の中空導電線1aは周囲に配置された他の中空導電線1bより断面肉厚が小さいものである。   1 to 3 show a high-frequency power supply line according to the first embodiment of the present invention. As shown in FIG. 1, in the high-frequency power supply line A formed integrally with a plurality of hollow conductive wires 1 having a hollow portion 6 therein and an insulator 2, one hollow conductive wire located at the center Means for arranging another hollow conductive wire 1b at an equal angle around 1a. This means is realized by positioning the plurality of hollow conductive wires 1 according to the shape of the insulator 2. Moreover, one hollow conductive wire 1a located in the center has a smaller cross-sectional thickness than the other hollow conductive wire 1b arranged around.

以下、この実施形態の高周波用給電線を、より具体的詳細に説明する。図2に示すように、絶縁物2は、中心位置に外被覆4で覆われている中空導電線1aの外形と同形状の孔2aが形成されており、外周には中心に対して等角度ピッチで、中空導電線1bが嵌る位置決め溝2bが複数形成されているものである。   Hereinafter, the high-frequency power supply line of this embodiment will be described in more detail. As shown in FIG. 2, the insulator 2 has a hole 2a having the same shape as the outer shape of the hollow conductive wire 1a covered with the outer coating 4 at the center position, and the outer periphery is equiangular with respect to the center. A plurality of positioning grooves 2b into which the hollow conductive wires 1b are fitted are formed at a pitch.

次に、図3に示すように、外被覆4で覆われている中空導電線1aを絶縁物2の中心位置の孔2aに配置し保持する。さらに、外被覆4で覆われている中空導電線1bを絶縁物2の外周に複数形成されている位置決め溝2bに嵌め込むことによって、中心に中空導電線1aが配置されて他の中空導電線1bが中空導電線1aを中心に等角度で周囲に配設される。   Next, as shown in FIG. 3, the hollow conductive wire 1 a covered with the outer coating 4 is arranged and held in the hole 2 a at the center position of the insulator 2. Furthermore, by inserting the hollow conductive wire 1b covered with the outer coating 4 into a plurality of positioning grooves 2b formed on the outer periphery of the insulator 2, the hollow conductive wire 1a is arranged at the center so that another hollow conductive wire is provided. 1b is arranged at an equal angle around the hollow conductive wire 1a.

そして、図1に示すように、絶縁物2の中心に中空導電線1aが配置し保持されて絶縁物2の位置決め溝2に中空導電線1bが配置されて一体となったものの外側を覆うように絶縁層3を成形することによって、中空導電線1bが絶縁物2から外れることなく確実に保持され、中空導電線1bと外部との絶縁性を保持することができる。 Then, as shown in FIG. 1, cover the outside of those together is arranged hollow conductive line 1b is a hollow conductive lines 1a are arranged hold the positioning groove 2 b of the insulator 2 at the center of the insulator 2 By forming the insulating layer 3 in this manner, the hollow conductive wire 1b is reliably held without being detached from the insulator 2, and the insulation between the hollow conductive wire 1b and the outside can be maintained.

このように、本願発明の高周波用給電線Aの中空導電線1は中心に対して等角度に配置することができる。   Thus, the hollow conductive wire 1 of the high-frequency feed line A of the present invention can be arranged at an equal angle with respect to the center.

また、中空導電線1aの断面肉厚は周囲に配設される他の中空導電線1bよりも薄く形成される。ここで、中空導電線1の中央部の空洞の内周面が、表皮効果によって高周波電流を流すための表皮部として機能し、その内周面に高周波電流が流れる表皮深さδは、中空導電線1の外周面に流れる表皮深さδと等しい。よって、中空導電線1の外径をr1、内径をr2、高周波電流が流れる表皮深さをδとしたとき、r1≧r2+2δとするのが望ましい。特に、中央に位置する中空導電線1aの表皮深さδは、周囲に複数の中空導電線1bが配設されているため、近接効果が他の中空導電線1bよりも大きく、表皮深さδがさらに小さくなるので、外形r1を小さくするか、内径r2を大きくすることが必要となる。よって、中空導電線1aの断面肉厚を他の中空導電線1bよりも薄くすることによって、電流抵抗値を低くすることができる。   Moreover, the cross-sectional thickness of the hollow conductive wire 1a is formed thinner than other hollow conductive wires 1b disposed around. Here, the inner peripheral surface of the hollow at the center of the hollow conductive wire 1 functions as a skin portion for flowing a high-frequency current by the skin effect, and the skin depth δ through which the high-frequency current flows on the inner peripheral surface It is equal to the skin depth δ flowing on the outer peripheral surface of the line 1. Therefore, when the outer diameter of the hollow conductive wire 1 is r1, the inner diameter is r2, and the skin depth through which the high-frequency current flows is δ, it is desirable that r1 ≧ r2 + 2δ. In particular, the skin depth δ of the hollow conductive wire 1a located in the center is larger than the other hollow conductive wires 1b because the plurality of hollow conductive wires 1b are arranged around the skin depth δ. Therefore, it is necessary to reduce the outer diameter r1 or increase the inner diameter r2. Therefore, the current resistance value can be lowered by making the cross-sectional thickness of the hollow conductive wire 1a thinner than the other hollow conductive wires 1b.

なお、中空導電線1を製造する製造方法は適宜であって、押出し法等によって所定の寸法の中空導電線1を形成してもよいし、所定の寸法より大きい径の導電線を引き抜き加工等によって所定の寸法に縮径加工することによって製造することができる。   The manufacturing method for manufacturing the hollow conductive wire 1 is appropriate. The hollow conductive wire 1 having a predetermined size may be formed by an extrusion method or the like, or a conductive wire having a diameter larger than the predetermined size may be drawn. Can be manufactured by reducing the diameter to a predetermined size.

したがって、中心に位置する一の中空導電線1aと、周囲に等角度に他の中空導電線1bとを配置することによって、当該複数の中空導電線1は軸中心に対して均等に配置されるので、高周波の電流を流した場合に、電流密度分布が均一になり、表皮効果を効果的に低減でき電流抵抗値を低くすることができる。   Therefore, by arranging one hollow conductive wire 1a located at the center and another hollow conductive wire 1b at an equal angle around the plurality of hollow conductive wires 1, the plurality of hollow conductive wires 1 are evenly arranged with respect to the axial center. Therefore, when a high-frequency current is passed, the current density distribution becomes uniform, the skin effect can be effectively reduced, and the current resistance value can be lowered.

また、中心に位置する一の中空導電線1aの断面肉厚を他の中空導電線1bより薄くすることによって、高周波で発生する近接効果が特に強く発生する中心に位置する中空導電線1aの電流抵抗値の増加をさらに低減させることができる。   Further, by making the cross-sectional thickness of one hollow conductive wire 1a located at the center thinner than that of the other hollow conductive wire 1b, the current of the hollow conductive wire 1a located at the center where the proximity effect generated at a high frequency is particularly strong is generated. The increase in resistance value can be further reduced.

以上では、中空部6を有する中空導電線1で構成する高周波用給電線Aについて説明したが、中空部6を有しない中実の導電線で構成した場合でも同様のことができる。   In the above, the high-frequency power supply line A configured by the hollow conductive wire 1 having the hollow portion 6 has been described, but the same can be achieved even when configured by a solid conductive wire having no hollow portion 6.

図4は、本願発明の第2の実施形態である高周波用給電線を示している。ここでは、上記第1の実施形態と相違する事項についてのみ説明し、その他の事項(構成、作用効果等)については、上記第1の実施形態と同様であるのでその説明を省略する。この高周波用給電線Aは、図4に示すように、中空導電線1の外周面に長手方向へ延設した溝5が複数周設することによって、中空導電線1の表面積を増やすことができる。ここで、溝5は等角度ピッチで中空導電線1の外周に配設されることが望ましい。なぜなら、電流密度分布を均一にすることによって、表皮効果を効果的に低減できるため、高周波用給電線Aを構成する中空導電線1の形状及び配置が中心に対して均一とする必要があるからである。   FIG. 4 shows a high-frequency power supply line according to the second embodiment of the present invention. Here, only matters different from those in the first embodiment will be described, and other matters (configuration, operational effects, and the like) are the same as those in the first embodiment, and thus description thereof will be omitted. As shown in FIG. 4, the high-frequency power supply line A can increase the surface area of the hollow conductive wire 1 by providing a plurality of grooves 5 extending in the longitudinal direction on the outer peripheral surface of the hollow conductive wire 1. . Here, it is desirable that the grooves 5 are arranged on the outer periphery of the hollow conductive wire 1 at an equiangular pitch. Because the skin effect can be effectively reduced by making the current density distribution uniform, it is necessary to make the shape and arrangement of the hollow conductive wire 1 constituting the high-frequency feed line A uniform with respect to the center. It is.

したがって、中空導電線1の外周に溝5を設けることで、中空導電線1の表面積を増やすことができるので、この中空導電線1に高周波電流を通電した場合に、表皮効果による電流抵抗値増加を低減できる。   Therefore, since the surface area of the hollow conductive wire 1 can be increased by providing the groove 5 on the outer periphery of the hollow conductive wire 1, the current resistance value increases due to the skin effect when a high-frequency current is passed through the hollow conductive wire 1. Can be reduced.

以上では、中空部6を有する中空導電線1で構成する高周波用給電線Aについて説明したが、中空部6を有しない中実の導電線で構成した場合でも同様のことができる。   In the above, the high-frequency power supply line A configured by the hollow conductive wire 1 having the hollow portion 6 has been described, but the same can be achieved even when configured by a solid conductive wire having no hollow portion 6.

本願発明の第1及び第2の実施形態は以下の構成とすることができる。図5に示すように、この高周波用給電線Aは、長手方向に突合せ接合された中空導電線1の該突合せ接合部の中空部6に両中空導電線1に跨がり且つ中空導電線1の内面に圧接するように嵌合させる接続部材7を介して中空導電線1が接続され、接続部材7の両端部に長手方向へ延設したスリット9が周設されている。   The first and second embodiments of the present invention can be configured as follows. As shown in FIG. 5, the high-frequency power supply line A extends over both the hollow conductive wires 1 to the hollow portion 6 of the butt joint portion of the hollow conductive wire 1 butt-joined in the longitudinal direction and The hollow conductive wire 1 is connected via a connecting member 7 that is fitted so as to be pressed against the inner surface, and slits 9 that extend in the longitudinal direction are provided at both ends of the connecting member 7.

図5は、2本の高周波用給電線Aを接合する場合で、複数ある中空導電線1の接合のうちの一の接合箇所についての長手方向に沿った断面図である。両中空導電線1の中空部6に跨り且つ中空部6の内面に圧接するように、導電体で構成されている接続部材7を嵌合させることによって、両中空導電線1が接続される。ここで、接続部材7は中空導電線1の中空部6に圧入することによって接合されるので、中空導電線1の内径r2及び接続部材7の外径R1に対してハメアイ寸法公差を適宜に設定する必要がある。   FIG. 5 is a cross-sectional view taken along the longitudinal direction of one of the joints of the plurality of hollow conductive wires 1 when two high-frequency power supply lines A are joined. Both hollow conductive wires 1 are connected by fitting a connecting member 7 made of a conductor so as to straddle the hollow portions 6 of both hollow conductive wires 1 and press contact with the inner surface of the hollow portion 6. Here, since the connecting member 7 is joined by being press-fitted into the hollow portion 6 of the hollow conductive wire 1, the tolerance of the eyelash dimension is appropriately set for the inner diameter r2 of the hollow conductive wire 1 and the outer diameter R1 of the connecting member 7. There is a need to.

また、中空導電線1の中空部6の内面に接触する接続部材7の両端外周面7aにローレット加工を施すことによって接触保持力を向上させることができる。   In addition, the contact holding force can be improved by knurling the outer peripheral surfaces 7 a of both ends of the connecting member 7 that contacts the inner surface of the hollow portion 6 of the hollow conductive wire 1.

ここで、接続部材7に流れる高周波電流による表皮効果によって接続部材7の電流抵抗値が増加するが、接続部材7の中央部を中空導電線1と同様に空洞とすることによって低減することができる。   Here, although the current resistance value of the connection member 7 increases due to the skin effect due to the high-frequency current flowing in the connection member 7, it can be reduced by making the central portion of the connection member 7 hollow like the hollow conductive wire 1. .

さらに、図5に示すように、接続部材7の両端部に長手方向へ延設したスリット9を設けることによって、接続部材7を中空導電線1の中空部6に圧入する場合に、接続部材7の両端部の径が縮まるように変形することで圧入が容易となる。また、接続部材7が圧入された状態においては、接続部材7の両端部に弾性が生じ、接続部分の接圧の安定を図ることができる。   Further, as shown in FIG. 5, when the connecting member 7 is press-fitted into the hollow portion 6 of the hollow conductive wire 1 by providing slits 9 extending in the longitudinal direction at both ends of the connecting member 7, the connecting member 7 It is easy to press-fit by deforming so that the diameters of both end portions thereof are reduced. Further, in a state where the connecting member 7 is press-fitted, elasticity is generated at both end portions of the connecting member 7, and the contact pressure at the connecting portion can be stabilized.

なお、接続部材7の中空導電線1と接触する両端部以外の外周に接続部材外被覆8を設けることによって、外部との絶縁性を確保することができる。   In addition, by providing the connection member outer coating 8 on the outer periphery of the connection member 7 other than both end portions in contact with the hollow conductive wire 1, insulation from the outside can be ensured.

したがって、中空導電線1同士を接続する接続部材7を用いることによって、容易に中空導電線1同士の接続ができ、加工工数を減らすことができる。しかも、中空導電線1と接続部材7の接触面は全周に亘っており、接続部材7の接触面をローレット加工することで接触保持力を向上させることができる。また、接続部材7の中央を空洞にすることによって、電流抵抗値を低減することができる。   Therefore, by using the connection member 7 for connecting the hollow conductive wires 1 to each other, the hollow conductive wires 1 can be easily connected to each other, and the number of processing steps can be reduced. Moreover, the contact surface between the hollow conductive wire 1 and the connection member 7 extends over the entire circumference, and the contact holding force can be improved by knurling the contact surface of the connection member 7. Moreover, the current resistance value can be reduced by making the center of the connecting member 7 hollow.

さらに、中空導電線1同士を接続する接続部材7にスリット9を設けることによって、接続部材7の両端部の径が縮まるように変形することで、接続部材7の中空導電線1の中空部6への圧入が容易となり、圧入状態においては、接続部材7と中空導電線1との接続部分の接圧を安定させることができる。   Furthermore, the hollow member 6 of the hollow conductive wire 1 of the connecting member 7 is deformed so that the diameters of both ends of the connecting member 7 are reduced by providing the slit 9 in the connecting member 7 that connects the hollow conductive wires 1 to each other. It becomes easy to press-fit into the connector, and in the press-fitted state, the contact pressure of the connecting portion between the connecting member 7 and the hollow conductive wire 1 can be stabilized.

本願発明の第1の実施形態である高周波用給電線の長手方向に対して鉛直な断面図である。It is sectional drawing perpendicular | vertical with respect to the longitudinal direction of the high frequency electric power feeding line which is 1st Embodiment of this invention. 同高周波用給電線の中空導電線の位置決めをする絶縁物の長手方向に対して鉛直な断面図である。It is sectional drawing perpendicular | vertical with respect to the longitudinal direction of the insulator which positions the hollow conductive wire of the same high frequency feeder. 同高周波用給電線の中空導電線が絶縁物に配置された状態の長手方向に対して鉛直な断面図である。It is sectional drawing perpendicular | vertical with respect to the longitudinal direction of the state with which the hollow conductive wire of the same electric power feeding line is arrange | positioned at the insulator. 本願発明の第2の実施形態である高周波用給電線の長手方向に対して鉛直な断面図である。It is sectional drawing perpendicular | vertical with respect to the longitudinal direction of the high frequency electric power feeding line which is the 2nd Embodiment of this invention. 本願発明の第1及び第2の実施形態である高周波用給電線の中空導電線における突合せ接合した接合部の長手方向に沿った断面図である。It is sectional drawing along the longitudinal direction of the junction part which carried out the butt-joining in the hollow conductive wire of the high frequency electric power feeding line which is the 1st and 2nd embodiment of this invention. 従来例である細分化されたリッツ線を用いた高周波用給電線の長手方向に対して鉛直な断面図である。It is sectional drawing perpendicular | vertical with respect to the longitudinal direction of the high frequency electric power feeding line using the subdivided litz wire which is a prior art example. 従来例である高周波用給電線の中空導電線の長手方向に対して鉛直な断面図である。It is sectional drawing perpendicular | vertical with respect to the longitudinal direction of the hollow conductive wire of the high frequency electric power feeding line which is a prior art example. 従来例である複数の中空導電線を用いた高周波用給電線の長手方向に対して鉛直な断面図である。It is sectional drawing perpendicular | vertical with respect to the longitudinal direction of the high frequency electric power feeding line using the some hollow conductive wire which is a prior art example.

符号の説明Explanation of symbols

A 高周波用給電線
1 中空導電線
1a 中心に位置する一の中空導電線
1b 周囲に位置する複数の中空導電線
2 絶縁物
位置決め溝
3 絶縁層
4 外被覆
5 溝
6 中空部
7 接続部材
8 接続部材外被覆
9 スリット
A High-frequency power supply line 1 Hollow conductive line 1a One hollow conductive line 1b located in the center 1b A plurality of hollow conductive lines located around 2 Insulator 2 b Positioning groove 3 Insulating layer 4 Outer coating 5 Groove 6 Hollow part 7 Connecting member 8 Connecting member outer cover 9 Slit

Claims (5)

一の導電線と前記一の導電線を中心として周囲に配置された他の導電線とを含む複数の導電線と、絶縁物と、を一体に形成してなる高周波用給電線において、中心に位置する前記一の導電線の周囲に前記他の導電線を等角度に配置する手段を有し、前記手段は前記一の導電線と同形状の孔が中心位置に形成され、かつその外周に等角度ピッチで前記他の導電線が嵌る位置決め溝が複数形成された前記絶縁物によって構成され、前記複数の導電線は内部にこの導電線と同軸の一つの中空部をそれぞれ有することを特徴とする高周波用給電線。 A high-frequency power supply line formed by integrally forming a plurality of conductive lines including one conductive line and another conductive line arranged around the one conductive line and an insulator, have a means for placing at equiangular the other conductive wire around the first conductive line positioned, said means the one conductive line and the shape of the hole is formed in the center position, and on its outer circumference It is constituted by the insulator formed with a plurality of positioning grooves into which the other conductive wires are fitted at an equiangular pitch, and the plurality of conductive wires each have one hollow portion coaxial with the conductive wire. High frequency power supply line. 中心に位置する前記一の導電線は周囲に配置された前記他の導電線より断面肉厚が小さいことを特徴とする請求項1記載の高周波用給電線。 High-frequency feed line of claim 1 wherein said one of conductive lines, wherein the cross-sectional thickness than the other conductive line disposed around small in the center. 前記導電線の外周面に長手方向へ延設した溝が複数周設されていることを特徴とする請求項1記載の高周波用給電線。 High-frequency feed line of claim 1, wherein the extended grooves in a longitudinal direction, characterized in that it is more circumferentially on the outer peripheral surface of the conductive wire. 長手方向に突合せ接合された前記導電線の該突合せ接合部の中空部に両導電線に跨がり且つ前記両導電線の内面に圧接するように嵌合させる接続部材を介して前記導電線が接続されることを特徴とする請求項1から3のいずれか1項に記載の高周波用給電線。The conductive wire is connected via a connecting member that is fitted to the hollow portion of the butt-joined portion of the conductive wire butt-joined in the longitudinal direction so as to straddle both conductive wires and press-contact with the inner surfaces of the two conductive wires. The high-frequency power supply line according to any one of claims 1 to 3, wherein the high-frequency power supply line is provided. 前記接続部材の両端部に前記長手方向へ延設したスリットが周設されていることを特徴とする請求項4記載の高周波用給電線。The high-frequency feed line according to claim 4, wherein slits extending in the longitudinal direction are provided at both ends of the connection member.
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