JP2017142988A - Fitting part structure of bipolar connector - Google Patents

Fitting part structure of bipolar connector Download PDF

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JP2017142988A
JP2017142988A JP2016023753A JP2016023753A JP2017142988A JP 2017142988 A JP2017142988 A JP 2017142988A JP 2016023753 A JP2016023753 A JP 2016023753A JP 2016023753 A JP2016023753 A JP 2016023753A JP 2017142988 A JP2017142988 A JP 2017142988A
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ceramic terminal
electrode pin
ceramic
fitting
tip
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JP6498615B2 (en
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学 武智
Manabu Takechi
学 武智
薫 八尾
Kaoru Yao
薫 八尾
俊彦 漁
Toshihiko Ryo
俊彦 漁
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Okazaki Manufacturing Co Ltd
National Institutes for Quantum and Radiological Science and Technology
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National Institutes for Quantum and Radiological Science and Technology
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Abstract

PROBLEM TO BE SOLVED: To achieve high resistance to discharge at a fitting part of a connector when transmitting a high-voltage signal, in a small-sized bipolar connector used under a high-temperature vacuum.SOLUTION: The fitting part structure is formed to have high resistance to discharge even in a small-sized type by providing ceramic terminal cylindrical parts 42a, 42b surrounding two pairs of coupled male electrode pins 2a, 2b and female electrode pins 3a, 3b at ceramic terminal bodies 41a, 41b positioned at a front end of a bipolar connector to lengthen a discharge path 10 and to reduce an area of a cable way generating discharge, thereby increasing a break-down voltage.SELECTED DRAWING: Figure 2

Description

本発明は、真空中で使用する高温用の２極コネクタの嵌合部構造であって、２つの電路に高電圧が印加されても放電が生じ難い嵌合部構造に関するするものである。   The present invention relates to a fitting part structure for a two-pole connector for high temperature used in a vacuum, and relates to a fitting part structure that is less likely to cause discharge even when a high voltage is applied to two electric paths.

真空中で使用する２極コネクタは、従来、特許文献１及び特許文献２に示されるような同軸型の嵌合部構造が専ら用いられてきた。   Conventionally, a coaxial connector structure as shown in Patent Document 1 and Patent Document 2 has been exclusively used for a two-pole connector used in a vacuum.

図５（ａ）（ｂ）は特許文献１に示される真空中で使用する２極コネクタの嵌合部構造の断面図で、図５（ａ）は一対のコネクタの結合前の状態、図５（ｂ）は一対のコネクタを結合した状態である。   5 (a) and 5 (b) are cross-sectional views of the fitting structure of the two-pole connector used in a vacuum shown in Patent Document 1, and FIG. 5 (a) is a state before the pair of connectors are coupled, FIG. (B) is the state which couple | bonded a pair of connector.

これは、左右のコネクタが其々オス電極ピン２１、メス電極ピン２２の中心軸に対してほぼ軸対象の形をした同軸コネクタであり、オス電極ピン２１とメス電極ピン２２が絶縁部材４５、４６に取り付けられ、絶縁部材４５、４６の外側には金属製の外枠３３、３４が設けられている。左右のコネクタを接続すると、オス電極ピン２１とメス電極ピン２２が１つの電路、外枠３３、３４がもう１つの電路となる２極コネクタである。   This is a coaxial connector in which the left and right connectors are substantially axially shaped with respect to the central axes of the male electrode pin 21 and the female electrode pin 22, respectively, and the male electrode pin 21 and the female electrode pin 22 are the insulating members 45, 46 and metal outer frames 33 and 34 are provided outside the insulating members 45 and 46. When the left and right connectors are connected, the male electrode pin 21 and the female electrode pin 22 are a two-pole connector in which one electric circuit and the outer frames 33 and 34 are another electric circuit.

図６（ａ）（ｂ）は特許文献２に示される真空中で使用する２極コネクタの嵌合部構造の断面図で、図６（ａ）は一対のコネクタの結合前の状態、図６（ｂ）は一対のコネクタを結合した状態である。   6 (a) and 6 (b) are cross-sectional views of the fitting structure of the two-pole connector used in a vacuum shown in Patent Document 2, and FIG. 6 (a) is a state before the pair of connectors are coupled, FIG. (B) is the state which couple | bonded a pair of connector.

これも左右のコネクタが其々オス電極ピン２３、メス電極ピン２４の中心軸に対してほぼ軸対象の形をした同軸コネクタであり、オス電極ピン２３とメス電極ピン２４が絶縁部材４７、４８に取り付けられ、絶縁部材４７、４８の外側には金属製の外枠３５、３６が設けられている。左右のコネクタを接続すると、オス電極ピン２３とメス電極ピン２４が１つの電路、外枠３５、３６がもう１つの電路となる２極コネクタである。   This is also a coaxial connector in which the left and right connectors are substantially axially shaped with respect to the central axes of the male electrode pin 23 and the female electrode pin 24, respectively. The male electrode pin 23 and the female electrode pin 24 are insulated members 47, 48. Metal outer frames 35 and 36 are provided outside the insulating members 47 and 48. When the left and right connectors are connected, the male electrode pin 23 and the female electrode pin 24 are a two-pole connector in which one electric circuit and the outer frames 35 and 36 are another electric circuit.

真空容器では真空化に先立って、真空容器の内壁面や内蔵物表面に吸着されたガスを放出させておくために、ベーキングと呼ばれる真空容器内の高温加熱が行われるのが一般的であり、また、真空到達後の運転も高温で行われるケースが多い。このため、真空用コネクタは高温で使用できる耐熱性のあるものが一般的で、絶縁部材としては、耐熱温度が低い樹脂類ではなく、セラミックなどの耐熱性のある無機絶縁材が通常用いられている。   Prior to evacuation, in order to release the gas adsorbed on the inner wall surface and built-in surface of the vacuum container, high-temperature heating inside the vacuum container called baking is generally performed. In many cases, the operation after reaching the vacuum is also performed at a high temperature. For this reason, vacuum connectors generally have heat resistance that can be used at high temperatures, and as insulating members, heat resistant inorganic insulating materials such as ceramics are usually used instead of resins with low heat resistance temperatures. Yes.

図６に示した特許文献２の２極コネクタは耐熱性を持たしており、嵌合部の絶縁部材４７、４８はセラミックを材料としている。図５に示した特許文献１の２極コネクタはテフロン（登録商標）樹脂が一部に用いられていて耐熱性を目指したものではないと思われるが、嵌合部の絶縁部材４５、４６の材料としてはアルミナを成型した無機絶縁材を使用している。   The two-pole connector of Patent Document 2 shown in FIG. 6 has heat resistance, and the insulating members 47 and 48 in the fitting portion are made of ceramic. Although the two-pole connector of Patent Document 1 shown in FIG. 5 uses Teflon (registered trademark) resin in part and does not seem to aim for heat resistance, the insulating members 45 and 46 of the fitting portion As the material, an inorganic insulating material obtained by molding alumina is used.

特開平１１−２８９６５１号公報JP-A-11-289651 特開２００１−６８２８号公報Japanese Patent Laid-Open No. 2001-6828

山納康他著 「真空中における沿面放電時のリアルタイム帯電分布測定に関する研究」埼玉大学紀要工学部、第３８号第１部論文集２００５年３月、ｐ．１−５Yasuo Yamano et al. "Study on real-time charge distribution measurement during creeping discharge in vacuum", Saitama University Bulletin of Engineering, No. 38, Part 1, March 2005, p. 1-5 山納康著「表面処理および表面分析手法による真空長ギャップ絶縁の新体系化」日本学術振興会 科学研究費助成事業成果報告書、課題番号２２６８６０２９、２０１３年６月Yasunori Yamano, “New Systematization of Vacuum Long Gap Insulation by Surface Treatment and Surface Analysis Techniques” Japan Society for the Promotion of Science Grant-in-Aid for Scientific Research, Project No. 22686029, June 2013

パッシェンの法則に示されるように、真空容器内の圧力を下げていくと、極低圧領域を除き、圧力の低下とともにその気中に置かれた電極間の放電開始電圧が低くなること、及び電極間距離つまり放電経路が短いほど放電開始電圧が低いことが知られている。加えて、例えば非特許文献１に示されるように、電極間に絶縁性固体の表面が存在すると、その表面上にある気体に沿った沿面放電が生じて、さらに放電開始電圧が低くなることも知られている。   As shown in Paschen's law, when the pressure in the vacuum vessel is lowered, except for the extremely low pressure region, the discharge start voltage between the electrodes placed in the air decreases as the pressure decreases, and the electrodes It is known that the discharge start voltage is lower as the distance, that is, the discharge path is shorter. In addition, for example, as shown in Non-Patent Document 1, if there is a surface of an insulating solid between the electrodes, creeping discharge along the gas on the surface may occur, and the discharge start voltage may further decrease. Are known.

前述のとおり、高温用の真空中コネクタでは、絶縁部材としてセラミックなどの無機絶縁材が使用されるが、無機絶縁材は樹脂のような弾力性が無いので、結合時に嵌合部の左右のコネクタの絶縁部材間にはミクロな隙間があり、そこに気体が残存する。   As described above, in a vacuum connector for high temperature, an inorganic insulating material such as ceramic is used as an insulating member. However, since the inorganic insulating material does not have elasticity like a resin, the connectors on the left and right sides of the mating portion when coupled are used. There are microscopic gaps between the insulating members, and gas remains there.

このため、放電開始電圧が低くなる真空中で使用され、かつ嵌合部に絶縁性固体である絶縁部材を備えた高温用の真空中コネクタでは、電路間に加わる電圧が高くなると、絶縁部材間に残存する気体を経路とする電路間の沿面放電が発生し易くなる。小型電気品であるコネクタを大型化して、この放電経路を長くすれば放電開始電圧を上げることができるが、高価になること、配置に広いスペースを要することなどから、大型化による放電開始電圧の上昇は望ましい方向ではない。   For this reason, in a high-temperature vacuum connector that is used in a vacuum where the discharge start voltage is low and that has an insulating member that is an insulating solid in the fitting portion, if the voltage applied between the electrical paths increases, Creeping discharges between electric circuits that use the gas remaining in the circuit as a route are likely to occur. If the connector, which is a small electrical product, is enlarged and the discharge path is lengthened, the discharge start voltage can be increased. However, since it is expensive and requires a large space for the arrangement, the discharge start voltage due to the increase in size can be increased. Rising is not the desired direction.

図５（ｃ）は、特許文献１の同軸型の真空中２極コネクタの放電経路を波線１１で示した図で、絶縁部材４５と絶縁部材４６の表面に沿ってそこに残存する気体を経路とする放電が生じ、また、図６（ｃ）は、特許文献２の同軸型の真空中２極コネクタの放電経路を波線１２で示した図で、絶縁部材４７と絶縁部材４８の表面に沿ってそこに残存する気体を経路とする放電が生じる。なお、図５（ｂ）（ｃ）、及び図６（ｂ）（ｃ）は、見易くするために、嵌合部の絶縁部材４５と絶縁部材４６との間、及び絶縁部材４７と絶縁部材４８との間の隙間を強調して描いており、図５（ｃ）と図６（ｃ）には断面を表すハッチングは描いていない。   FIG. 5C is a diagram showing the discharge path of the coaxial two-pole connector in vacuum in Patent Document 1 as a wavy line 11, and the remaining gas is routed along the surfaces of the insulating member 45 and the insulating member 46. FIG. 6C is a diagram showing the discharge path of the coaxial two-pole connector in vacuum in Patent Document 2 as a wavy line 12, along the surfaces of the insulating member 47 and the insulating member 48. Discharge occurs through the gas remaining there. 5B and 6C and FIGS. 6B and 6C are provided between the insulating member 45 and the insulating member 46 of the fitting portion and between the insulating member 47 and the insulating member 48 for easy understanding. In FIG. 5 (c) and FIG. 6 (c), hatching representing a cross section is not drawn.

以上のように、高温用の真空中コネクタは、真空中で使用されかつ電路間に絶縁性固体の表面が存在する小型電気品であるために、放電開始電圧が低く、電路間の電圧が高いと放電が生じ易い特性を持つが、従来の高温用の真空中２極コネクタは、さらに放電開始電圧を低下させる以下の問題があった。   As described above, the high-temperature vacuum connector is a small electrical product that is used in a vacuum and has an insulating solid surface between the electric circuits. Therefore, the discharge start voltage is low and the voltage between the electric circuits is high. However, the conventional high-temperature two-pole connector in vacuum has the following problem of further reducing the discharge start voltage.

非特許文献２に示されるように、対向する電極の面積、即ち電極表面のうちの放電が発生する部分の面積が広いほど放電開始電圧が低いことが知られている。   As shown in Non-Patent Document 2, it is known that the discharge start voltage is lower as the area of the opposing electrode, that is, the area of the portion of the electrode surface where discharge occurs is larger.

従来の高温用の真空中２極コネクタにおいて、図５（ｃ）、図６（ｃ）の放電経路１１、１２は、電極ピン２１〜２４を中心軸とする角度３６０度のどの断面でも生じ、図５（ｃ）では、絶縁部材４５と絶縁部材４６との隙間に面する、金属製の外枠３４の全周とオス電極ピン２１全周が放電の発生する部分の面積となり、図６（ｃ）では、絶縁部材４７と絶縁部材４８との隙間に面する、金属製の外枠３６の全周とオス電極ピン２３の全周が放電の発生する部分の面積となる。   In the conventional high-temperature vacuum two-pole connector for high temperature, the discharge paths 11 and 12 in FIGS. 5C and 6C are generated in any cross section having an angle of 360 degrees with the electrode pins 21 to 24 as the central axis, In FIG. 5C, the entire circumference of the metal outer frame 34 and the entire circumference of the male electrode pin 21 facing the gap between the insulating member 45 and the insulating member 46 are the areas of the portions where discharge occurs, and FIG. In c), the entire circumference of the metal outer frame 36 and the entire circumference of the male electrode pin 23 facing the gap between the insulating member 47 and the insulating member 48 are the area of the portion where discharge occurs.

このように従来の高温用の真空中２極コネクタでは、電路のうち放電の発生する部分の面積が絶縁部材４５〜４８の隙間に面する全周に亘るために広く、これが放電開始電圧をさらに低下させる要因となっている問題があった。我々は調査、研究の結果、この要因を見出し、以下に説明する本発明に結びつけた。   Thus, in the conventional high-temperature vacuum two-pole connector for the high temperature, the area of the portion where the discharge occurs in the electric circuit extends over the entire circumference facing the gap between the insulating members 45 to 48, which further increases the discharge start voltage. There was a problem that caused a decrease. As a result of investigation and research, we found this factor and linked it to the present invention described below.

（１）上述の課題を解決するために、真空中で使用され、一対のコネクタからなる２極コネクタの嵌合部構造を次のとおりとした。
嵌合部は、一対のコネクタの各方に１つのセラミック端子と、両方で二対のオス電極ピンとメス電極ピンで構成され、
オス電極ピンは、金属を材質とした曲がりのない棒形状であり、
メス電極ピンは、金属を材質とした曲がりのない棒形状であって、先端に、オス電極ピンの先端部が差し込まれる軸方向の窪みのある部分が設けられており、
セラミック端子は、絶縁性セラミックが材質で、セラミック端子本体とセラミック端子筒状部よりなり、
セラミック端子本体は、結合方向に平行な２つの貫通孔が設けられていて、各貫通孔の其々にはオス電極ピンまたはメス電極ピンが先端を嵌合側にして挿通され、このオス電極ピンまたはメス電極ピンはメタライズされた貫通孔の全面と隙間無くろう付けされて固定されており、
セラミック端子筒状部は、筒形状で、セラミック端子本体の嵌合側にあって、軸方向が結合方向と平行に、セラミック端子本体の１つの貫通孔がセラミック端子筒状部の内側の孔の中央になる位置に設けられていて、当貫通孔に固定されているオス電極ピンまたはメス電極ピンの嵌合部側の先端部は、セラミック端子筒状部の嵌合側先端よりセラミック端子本体側に位置しており、
一対のコネクタを結合すると、一方のコネクタのセラミック端子筒状部内のオス電極ピンまたはメス電極ピンと、それと対になる他方のコネクタのセラミック端子筒状部外のメス電極ピンまたはオス電極ピンとが、オス電極ピンの先端部がメス電極ピンの先端部の窪みに差し込まれることによって電路を対毎に合わせて２つ形成し、また、一方のコネクタのセラミック端子筒状部の嵌合側先端面は他方のセラミック端子本体の嵌合側表面に互いに略接した状態となる構造とした。 (1) In order to solve the above-mentioned problems, the fitting part structure of a two-pole connector used in a vacuum and composed of a pair of connectors is as follows.
The fitting part is composed of one ceramic terminal on each side of the pair of connectors, and two pairs of male electrode pins and female electrode pins on both sides.
The male electrode pin has a rod shape with no bending made of metal,
The female electrode pin is a non-bent rod shape made of a metal material, and at the tip is provided with a portion with a hollow in the axial direction into which the tip of the male electrode pin is inserted,
The ceramic terminal is made of insulating ceramic and consists of a ceramic terminal body and a ceramic terminal cylindrical part.
The ceramic terminal body is provided with two through holes parallel to the coupling direction, and a male electrode pin or a female electrode pin is inserted into each through hole with the tip as a fitting side. Or the female electrode pin is brazed and fixed without gaps across the entire surface of the metallized through hole,
The ceramic terminal cylindrical portion is cylindrical and is on the mating side of the ceramic terminal main body, the axial direction is parallel to the coupling direction, and one through hole of the ceramic terminal main body is a hole inside the ceramic terminal cylindrical portion. The tip of the fitting part side of the male or female electrode pin that is provided in the center and fixed to the through hole is on the ceramic terminal body side from the fitting side tip of the ceramic terminal cylindrical part Located in the
When a pair of connectors are connected, the male electrode pin or female electrode pin in the ceramic terminal cylindrical part of one connector and the female electrode pin or male electrode pin outside the ceramic terminal cylindrical part of the other connector paired therewith are male. The tip part of the electrode pin is inserted into the recess of the tip part of the female electrode pin to form two electric paths for each pair, and the fitting side tip surface of the ceramic terminal cylindrical part of one connector is the other The ceramic terminal main body has a structure in which the ceramic terminal main body is substantially in contact with each other.

この２極コネクタは、絶縁部材であるセラミック端子の材質がセラミックであるので、高温で使用することができる。   This two-pole connector can be used at a high temperature because the ceramic terminal, which is an insulating member, is made of ceramic.

２つの電路に高電圧が付加されて放電が生じた場合の放電経路は、一方のセラミック端子筒状部の嵌合側先端面と他方のセラミック端子本体の嵌合側表面とが接する箇所のミクロな隙間に残存する気体を通り、一方もしくは他方のセラミック端子筒状部の表面に沿って進んだ後、他方のセラミック端子筒状部の嵌合側先端面と一方のセラミック端子本体の嵌合側表面が接する箇所のミクロな隙間に残存する気体を通る経路になる。   The discharge path when a high voltage is applied to the two electric circuits causes a discharge path. The discharge path is a micro area where the front end surface on the mating side of one ceramic terminal cylindrical portion and the mating side surface of the other ceramic terminal body are in contact. After passing through the gas remaining in the gap and proceeding along the surface of one or the other ceramic terminal cylindrical part, the mating side tip surface of the other ceramic terminal cylindrical part and the mating side of one ceramic terminal body It becomes the path | route which passes the gas which remains in the micro clearance gap of the location which the surface contact | connects.

電路のうち放電の発生する部分の面積は、一方のセラミック端子筒状部の嵌合側先端面と他方のセラミック端子本体の嵌合側表面との隙間に面した他方のオス電極ピンまたはメス電極ピンの表面のうち、他方のセラミック端子筒状部側の表面、及び、他方のセラミック端子筒状部の嵌合側先端面と一方のセラミック端子本体の嵌合側表面との隙間に面した一方のオス電極ピンまたはメス電極ピンの表面のうち、一方のセラミック端子筒状部側の表面である。   The area of the portion of the electrical circuit where discharge occurs is the other male electrode pin or female electrode facing the gap between the fitting side tip surface of one ceramic terminal cylindrical portion and the fitting side surface of the other ceramic terminal body One of the surfaces of the pin facing the gap between the surface on the other ceramic terminal cylindrical portion side and the fitting side tip surface of the other ceramic terminal cylindrical portion and the fitting side surface of one ceramic terminal body Among the surfaces of the male electrode pin or the female electrode pin, the surface on the one side of the ceramic terminal tubular portion.

この放電の発生する電路の面積を、同程度の寸法の従来の同軸型真空中２極コネクタと比べると、従来のものは、絶縁部材の隙間に面する外枠とオス電極ピンの全周であるのに対し、本発明による２極コネクタでは、絶縁部材の隙間に面する他方のオス電極ピンまたはメス電極ピンの一部と一方のオス電極ピンまたはメス電極ピンの一部であるので、従来のものより大幅に狭い面積となっていて、このため従来のものより放電開始電圧が高く、放電が生じ難い。   Compared with the conventional coaxial type two-pole connector in vacuum, the area of the electric circuit where this discharge is generated is similar to the conventional one in the outer frame facing the gap between the insulating members and the entire circumference of the male electrode pin. On the other hand, in the two-pole connector according to the present invention, since it is a part of the other male electrode pin or female electrode pin and a part of one male electrode pin or female electrode pin facing the gap of the insulating member, Therefore, the discharge starting voltage is higher than that of the conventional one and the discharge is less likely to occur.

また、セラミック端子筒状部を長くし、それに応じてオス電極ピンとメス電極ピンのセラミック端子本体から嵌合部側に出た部分を長くすることによって放電経路を長くすることができ、放電開始電圧が実用電圧より低い場合には、こうすることによって容易に放電開始電圧を高めることができる特徴を持っている。   In addition, the discharge path can be lengthened by lengthening the ceramic terminal cylindrical portion and lengthening the portion of the male electrode pin and female electrode pin that protrude from the ceramic terminal body toward the fitting portion. When the voltage is lower than the practical voltage, the discharge starting voltage can be easily increased by doing so.

さらに、従来の同軸型真空中２極コネクタは電路が外面に露出しているために電位がある物体に接すると電路による正常な伝送ができなくなるのに対し、本発明によるコネクタは電路が絶縁部材で囲まれているために、電位のある物体に接しても機能が損なわれることが無い。   Further, since the conventional coaxial type two-pole connector in vacuum is exposed on the outer surface, normal transmission by the electric circuit cannot be performed when contacting an object having a potential. Therefore, the function is not impaired even if it is in contact with an object having a potential.

真空中で使用される高温用のケーブルは、耐熱性のあるＭＩケーブル（Ｍｉｎｅｒａｌ Ｉｎｓｕｌａｔｅ Ｃａｂｌｅ）、つまり金属シース内に無機絶縁材粉末を介在して導線が収容されたケーブルが用いられる。本発明による２極コネクタは、電極ピンとセラミック端子本体の貫通孔は隙間無くろう付けをされているために、セラミック端子本体の反嵌合部側のＭＩケーブルと２極コネクタの嵌合部とを接続する金具の内部、及びＭＩケーブルの金属シースの内部を、外部環境に対して密閉された状態にすることができ、真空中での使用において、これら内部の真空化を防ぐことが可能である。このため、接続金具の内部及びＭＩケーブルの内部で放電が発生する懸念がない。   A high-temperature cable used in a vacuum is a heat-resistant MI cable (Mineral Insulate Cable), that is, a cable in which a conductive wire is accommodated in a metal sheath with an inorganic insulating material powder interposed therebetween. In the two-pole connector according to the present invention, since the electrode pin and the through hole of the ceramic terminal body are brazed without a gap, the MI cable on the side opposite to the fitting portion of the ceramic terminal body and the fitting portion of the two-pole connector are connected. The inside of the metal fitting to be connected and the inside of the metal sheath of the MI cable can be sealed with respect to the external environment, and when used in a vacuum, it is possible to prevent the inside from being evacuated. . For this reason, there is no fear that electric discharge occurs inside the connection fitting and the MI cable.

（２） 上記（１）の２極コネクタの嵌合部構造において、
オス電極ピンの先端に、外形が先細りの部分を設けることにより、
本発明による一対のコネクタを結合する際、オス電極ピンに曲がりが生じて少しの径方向の位置ずれがあってもその先端が先細りのためメス電極ピンの窪みに差し込むことができる。 (2) In the fitting part structure of the two-pole connector of (1) above,
By providing a tapered part at the tip of the male electrode pin,
When connecting a pair of connectors according to the present invention, even if the male electrode pin is bent and there is a slight radial misalignment, the tip of the male electrode pin is tapered, so that it can be inserted into the recess of the female electrode pin.

（３） 上記（２)の２極コネクタの嵌合部構造において、
メス電極ピンの先端に、外形が先細りで、メス電極ピンの他の部分に比べて最大径が等しいかまたは大きく、最大径の部分はセラミック端子筒状部の内側の孔に略接する形状で、かつオス電極ピンの先端部が差し込まれる軸方向の窪みがある部分を設けることにより、
セラミック端子筒状部の内側の孔の中央になる位置に固定されているのがオス電極ピンで、一対のコネクタの結合の際、セラミック端子筒状部へ嵌合側から挿入されるのがメス電極ピンの場合であっても、本発明による一対のコネクタの結合の際、精密な径方向の位置合わせをせずとも、メス電極ピンの先端部外形が先細りであるので、セラミック端子筒状部へメス電極ピンを挿入することができ、また、メス電極ピンの先端部の最大径は他の部分より等しいか大きく、かつこの最大径部はセラミック端子筒状部の内側の孔に略接する形状であるので、セラミック端子筒状部の内部において窪みの位置がぶれず、このためオス電極ピンの先端部をメス電極ピンの窪みに確実に差し込むことができる。 (3) In the fitting part structure of the two-pole connector of (2) above,
At the tip of the female electrode pin, the outer shape is tapered, the maximum diameter is equal to or larger than the other part of the female electrode pin, and the portion of the maximum diameter is in a shape that is substantially in contact with the inner hole of the ceramic terminal cylindrical part, And by providing a portion with an axial recess into which the tip of the male electrode pin is inserted,
The male electrode pin is fixed at the center of the hole inside the ceramic terminal cylindrical part, and when a pair of connectors are connected, the female terminal is inserted into the ceramic terminal cylindrical part from the mating side. Even in the case of electrode pins, when the pair of connectors according to the present invention is connected, the outer shape of the tip of the female electrode pin is tapered without precise radial alignment. A female electrode pin can be inserted, and the maximum diameter of the tip of the female electrode pin is equal to or larger than the other parts, and this maximum diameter part is a shape that is substantially in contact with the inner hole of the ceramic terminal cylindrical part. Therefore, the position of the depression does not move inside the ceramic terminal cylindrical portion, and therefore, the tip end portion of the male electrode pin can be reliably inserted into the depression of the female electrode pin.

(４) また、上記（３）の２極コネクタの嵌合部構造において、
メス電極ピンの先端部は、テーパーを付けて窪みの先端が広がった形状とすることにより、オス電極ピンの先端部をメス電極ピン先端部の窪みに、さらに確実に差し込むことができる。 (4) In the fitting structure of the two-pole connector of (3) above,
The tip of the female electrode pin is tapered so that the tip of the recess is widened, so that the tip of the male electrode pin can be more reliably inserted into the recess of the tip of the female electrode pin.

（５）上記（１）乃至（４）のいずれかの２極コネクタの嵌合部構造において、
セラミック端子本体とセラミック端子筒状部は分けて作られ、セラミック端子筒状部がセラミック端子本体にセラミック接着剤で接着されているセラミック端子としてもよい。 (5) In the fitting part structure of the two-pole connector according to any one of (1) to (4) above,
The ceramic terminal main body and the ceramic terminal cylindrical portion may be formed separately, and the ceramic terminal cylindrical portion may be a ceramic terminal bonded to the ceramic terminal main body with a ceramic adhesive.

（６）また、上記（１）乃至（４）のいずれかの２極コネクタの嵌合部構造において、
セラミック端子本体とセラミック端子筒状部は分けて作られ、セラミック端子筒状部の後端部がセラミック端子本体の嵌合側の面に設けられた有底穴に差し込まれてセラミック接着剤で接着されているセラミック端子としてもよい。 (6) Moreover, in the fitting part structure of the two-pole connector according to any one of (1) to (4) above,
The ceramic terminal body and the ceramic terminal tubular part are made separately, and the rear end of the ceramic terminal tubular part is inserted into the bottomed hole provided on the mating side surface of the ceramic terminal body and bonded with a ceramic adhesive It may be a ceramic terminal.

（７）上記（１）及至（６）のいずれかの２極コネクタの嵌合部構造において、
セラミック端子本体の嵌合側表面を、他方のコネクタのセラミック端子筒状部の嵌合側先端面が略接する部分にザグリが設けられている表面とし、一対のコネクタを結合すると、一方のセラミック端子本体のザグリの底部表面に他方のコネクタのセラミック端子筒状部の嵌合側先端面が互いに略接した状態となる構造とすることによって、放電経路が２つのザグリの深さ分長くなり、放電開始電圧をさらに上げることができる。 (7) In the fitting structure of the two-pole connector of any one of (1) to (6) above,
When the mating side surface of the ceramic terminal body is the surface where the counterbore is provided at the portion where the mating side end surface of the ceramic terminal cylindrical part of the other connector is substantially in contact, By adopting a structure in which the mating side end face of the ceramic terminal cylindrical part of the other connector is substantially in contact with the bottom surface of the counterbore of the main body, the discharge path becomes longer by the depth of the two counterbore. The starting voltage can be further increased.

高温の真空中での使用において、従来の２極コネクタに比べて放電開始電圧が高く、放電が生じ難い効果がある。また、従来のものと異なり、電路が絶縁部材で囲まれているために、電位のある物体に接しても機能が損なわれない付随的効果もある。   When used in a high-temperature vacuum, the discharge starting voltage is higher than that of the conventional two-pole connector, and there is an effect that the discharge hardly occurs. Also, unlike the conventional one, since the electric circuit is surrounded by an insulating member, there is an accompanying effect that the function is not impaired even when it comes into contact with an object having a potential.

本発明による第１の実施形態の結合前のコネクタ断面図及び矢視図である。It is the connector sectional view and arrow view before the coupling of a 1st embodiment by the present invention. （ａ）本発明による第１の実施形態の結合後の嵌合部断面図である。（ｂ）同嵌合部の放電経路を示す断面図である。(A) It is fitting part sectional drawing after the coupling | bonding of 1st Embodiment by this invention. (B) It is sectional drawing which shows the discharge path | route of the fitting part. 本発明による第１の実施形態の試作例における耐電圧データである。It is withstand voltage data in the trial manufacture example of 1st Embodiment by this invention. 本発明による第２乃至第５の実施形態の結合後の嵌合部断面図である。It is a fitting part sectional view after the combination of the 2nd thru / or a 5th embodiment by the present invention. （ａ）（ｂ）特許文献１に示される一対のコネクタの結合前後の嵌合部断面図である。（ｃ）同嵌合部の放電経路を示す断面図である。(A) (b) It is fitting part sectional drawing before and behind the coupling | bonding of a pair of connector shown by patent document 1. FIG. (C) It is sectional drawing which shows the discharge path | route of the fitting part. （ａ）（ｂ）特許文献２に示される一対のコネクタの結合前後の嵌合部断面図である。（ｃ）同嵌合部の放電経路を示す断面図である。(A) (b) It is fitting part sectional drawing before and behind the coupling | bonding of a pair of connector shown by patent document 2. FIG. (C) It is sectional drawing which shows the discharge path | route of the fitting part.

（第１の実施形態）
本発明の第１の実施形態を図１及び図２に沿って説明する。図１は、本発明による第１の実施形態の結合前のコネクタ断面図及び矢視図で、図１(ａ)は結合前のコネクタの軸方向断面図、図１（ｂ）（ｃ）（ｄ）は其々、図１（ａ）のＡ−Ａ断面、Ｂ−Ｂ断面、Ｃ−Ｃ矢視図である。また、図２（ａ）は、本発明による第１の実施形態の一対のコネクタの結合後の嵌合部断面図ある。 (First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. 1 and 2. 1A and 1B are a cross-sectional view and an arrow view of a connector before coupling according to the first embodiment of the present invention. FIG. 1A is an axial sectional view of the connector before coupling, and FIGS. d) is an AA cross section, a BB cross section, and a CC arrow view of FIG. Moreover, Fig.2 (a) is a fitting part sectional drawing after the coupling | bonding of a pair of connector of 1st Embodiment by this invention.

まず、第１の実施形態のうち、本発明に直接係わる２極コネクタの嵌合部について説明する。図１に示すように、２極コネクタの嵌合部は、一対のコネクタ１ａ、１ｂの各方に１つのセラミック端子４ａ、４ｂと、両方で二対のオス電極ピン２ａ、２ｂとメス電極ピン３ａ、３ｂで構成されている。   First, the fitting part of the two-pole connector which concerns directly on this invention among 1st Embodiment is demonstrated. As shown in FIG. 1, the fitting portion of the two-pole connector includes one ceramic terminal 4a, 4b on each of the pair of connectors 1a, 1b, and two pairs of male electrode pins 2a, 2b and female electrode pins. 3a and 3b.

オス電極ピン２ａ、２ｂは、金属を材質とした曲がりのない棒形状であり、メス電極ピン３ａ、３ｂは、金属を材質とした曲がりのない棒形状であって、先端に、オス電極ピン２ａ、２ｂの先端部が差し込まれる軸方向の窪み３２ａ、３２ｂのある部分３１ａ、３１ｂが設けられている。   The male electrode pins 2a and 2b have a bar shape without bending made of metal, and the female electrode pins 3a and 3b have a bar shape without bending made of metal and have a male electrode pin 2a at the tip. There are provided portions 31a and 31b having axial depressions 32a and 32b into which the tip ends of 2b are inserted.

セラミック端子４ａ、４ｂは、絶縁性セラミックが材質で、セラミック端子本体４１ａ、４１ｂとセラミック端子筒状部４２ａ、４２ｂより構成されている。   The ceramic terminals 4a and 4b are made of an insulating ceramic and are composed of ceramic terminal bodies 41a and 41b and ceramic terminal cylindrical portions 42a and 42b.

セラミック端子本体４１ａ、４１ｂは、コネクタ１ａ、１ｂの結合方向に平行な２つの貫通孔４３ａ、４４ａと貫通孔４３ｂ、４４ｂが其々設けられ、貫通孔４３ａにはオス電極ピン２ａが、貫通孔４４ａにはメス電極ピン３ａが、貫通孔４３ｂにはオス電極ピン２ｂが、貫通孔４４ｂにはメス電極ピン３ｂが、先端を嵌合側にして挿通され、このオス電極ピン２ａ、２ｂ、メス電極ピン３ａ、３ｂはそれが挿通されたメタライズされた貫通孔４３ａ、４３ｂ、４４ａ、４４ｂの全面と隙間無くろう付けされて固定されている。   The ceramic terminal bodies 41a and 41b are respectively provided with two through holes 43a and 44a and through holes 43b and 44b that are parallel to the connecting direction of the connectors 1a and 1b, and the male electrode pin 2a is formed in the through hole 43a. The female electrode pin 3a is inserted into the pin 44a, the male electrode pin 2b is inserted into the through hole 43b, and the female electrode pin 3b is inserted into the through hole 44b with the tip thereof as the fitting side. The male electrode pins 2a, 2b, female The electrode pins 3a and 3b are brazed and fixed to the entire surface of the metallized through holes 43a, 43b, 44a and 44b through which the electrode pins 3a and 3b are inserted without any gaps.

セラミック端子筒状部４２ａ、４２ｂは、筒形状で、セラミック端子本体４１ａ、４１ｂの嵌合側にあって、軸方向が結合方向と平行に、セラミック端子本体４１ａの１つの貫通孔４３ａがセラミック端子筒状部４２ａの内側の孔の中央になる位置に設けられ、またセラミック端子本体４１ｂの１つの貫通孔４３ｂがセラミック端子筒状部４２ｂの内側の孔の中央になる位置に設けられ、貫通孔４３ａ、４３ｂに固定されているオス電極ピン２ａ、２ｂの嵌合側の先端部は、セラミック端子筒状部４２ａ、４２ｂの嵌合側先端よりセラミック端子本体４１ａ、４１ｂ側に位置している。   The ceramic terminal cylindrical portions 42a and 42b are cylindrical and are on the mating side of the ceramic terminal bodies 41a and 41b. The axial direction is parallel to the coupling direction, and one through hole 43a of the ceramic terminal body 41a is a ceramic terminal. Provided at a position that is the center of the inner hole of the cylindrical portion 42a, and one through hole 43b of the ceramic terminal body 41b is provided at a position that is the center of the inner hole of the ceramic terminal cylindrical portion 42b. The end portions on the fitting side of the male electrode pins 2a, 2b fixed to 43a, 43b are located closer to the ceramic terminal bodies 41a, 41b than the fitting side tips of the ceramic terminal cylindrical portions 42a, 42b.

コネクタ１ａ、１ｂを結合すると、図２(ａ)に示すように、セラミック端子筒状部４２ａ、４２ｂ内のオス電極ピン２ａ、２ｂと、それと対になるセラミック端子筒状部４２ｂ、４２ａ外のメス電極ピン３ｂ、３ａとが、オス電極ピン２ａ、２ｂの先端部がメス電極ピン３ｂ、３ａの先端部３１ｂ、３１ａの窪み３２ｂ、３２ａに差し込まれることによって電路を対毎に合わせて２つ形成し、また、セラミック端子筒状部４２ａ、４２ｂの嵌合側先端面は他方のセラミック端子本体４１ｂ、４１ａの嵌合側表面に略接した状態となる。   When the connectors 1a and 1b are joined, as shown in FIG. 2A, the male electrode pins 2a and 2b in the ceramic terminal cylindrical portions 42a and 42b and the ceramic terminal cylindrical portions 42b and 42a outside the ceramic terminal cylindrical portions 42b and 42a are paired. The female electrode pins 3b and 3a are inserted into the recesses 32b and 32a of the tip portions 31b and 31a of the male electrode pins 3b and 3a by inserting the tip portions of the male electrode pins 2a and 2b, so that there are two electric paths for each pair. In addition, the fitting-side front end surfaces of the ceramic terminal cylindrical portions 42a and 42b are substantially in contact with the fitting-side surfaces of the other ceramic terminal bodies 41b and 41a.

オス電極ピン２ａ、２ｂの外形を先細り形状としているために、コネクタ１ａ、１ｂを結合する際、オス電極ピン２ａ、２ｂに曲がりが生じて少しの径方向の位置ずれがあっても、メス電極ピン３ｂ、３ａの窪み３２ｂ、３２ａに差し込むことができる。   Since the outer shape of the male electrode pins 2a and 2b is tapered, the female electrode can be used even if the male electrode pins 2a and 2b are bent and slightly displaced in the radial direction when connecting the connectors 1a and 1b. It can be inserted into the recesses 32b and 32a of the pins 3b and 3a.

なお、本発明の実施形態において、貫通孔４３ａ、４４ａ、４３ｂ、４４ｂに挿通される電極ピンがオス電極ピンかメス電極ピンかは必ずしも図１、図２(ａ)に示すとおりである必要はない。メス電極ピン３ａとオス電極ピン２ｂが挿通される貫通孔が入れ替わってもよいし、さらに、オス電極ピン２ａとメス電極ピン３ｂが挿通される貫通孔が入れ替わってもよい。つまり、セラミック端子筒状部４２ａ、４２ｂにある貫通孔４３ａ、４３ｂに挿通された電極ピンの先端部が其々、セラミック端子筒状部４２ａ、４２ｂの嵌合側先端よりセラミック端子本体４１ａ、４１ｂ側に位置し、かつ、コネクタ１ａ、１ｂの結合状態において、上述のようにオス電極ピンの先端部がメス電極ピンの先端部の窪み３２ａ、３２ｂに差し込まれるように貫通孔が選択されておればよい。このことは後述する第２乃至第５の実施形態においても同様である。   In the embodiment of the present invention, whether the electrode pin inserted into the through holes 43a, 44a, 43b, 44b is a male electrode pin or a female electrode pin is not necessarily as shown in FIG. 1 and FIG. 2 (a). Absent. The through hole through which the female electrode pin 3a and the male electrode pin 2b are inserted may be interchanged, and further, the through hole through which the male electrode pin 2a and the female electrode pin 3b are inserted may be interchanged. That is, the tip portions of the electrode pins inserted through the through holes 43a and 43b in the ceramic terminal cylindrical portions 42a and 42b are respectively connected to the ceramic terminal main bodies 41a and 41b from the fitting side tips of the ceramic terminal cylindrical portions 42a and 42b. The through hole is selected so that the distal end portion of the male electrode pin is inserted into the recesses 32a and 32b of the distal end portion of the female electrode pin as described above in the coupled state of the connectors 1a and 1b. That's fine. The same applies to the second to fifth embodiments described later.

メス電極ピン３ａ、３ｂの先端部３１ａ、３１ｂは、外形が先細りの形状をしているので、セラミック端子筒状部４２ａ、４２ｂの内側の孔の位置に固定されているのがオス電極ピン２ａ、２ｂで、コネクタ１ａ、１ｂの結合の際、セラミック端子筒状部４２ａ、４２ｂへ嵌合側から挿入されるのがメス電極ピン３ｂ、３ａの場合であっても、コネクタ１ａ、１ｂの結合の際、精密な径方向の位置合わせをせずとも、セラミック端子筒状部４２ａ、４２ｂへメス電極ピン３ｂ、３ａを挿入することができ、また、メス電極ピン３ａ．３ｂの先端部３１ａ、３１ｂの最大径は他の部分より大きく、かつこの最大径部は、セラミック端子筒状部４２ａ、４２ｂの内側の孔に略接する形状であるので、セラミック端子筒状部４２ａ、４２ｂの内部において窪み３２ｂ、３２ａの位置がぶれず、このためオス電極ピン２ａ、２ｂの先端部をメス電極ピン３ｂ、３ａ先端の窪み３２ｂ、３２ａに確実に差し込むことができる。   Since the outer end portions 31a and 31b of the female electrode pins 3a and 3b are tapered, the male electrode pin 2a is fixed to the position of the hole inside the ceramic terminal cylindrical portions 42a and 42b. 2b, when the connectors 1a and 1b are joined, even if the female electrode pins 3b and 3a are inserted into the ceramic terminal cylindrical portions 42a and 42b from the fitting side, the connectors 1a and 1b are joined. In this case, the female electrode pins 3b and 3a can be inserted into the ceramic terminal cylindrical portions 42a and 42b without precise radial alignment, and the female electrode pins 3a. Since the maximum diameter of the tip portions 31a and 31b of 3b is larger than the other portions, and this maximum diameter portion has a shape substantially in contact with the inner hole of the ceramic terminal cylindrical portions 42a and 42b, the ceramic terminal cylindrical portion 42a. 42b, the positions of the depressions 32b and 32a do not fluctuate, so that the distal ends of the male electrode pins 2a and 2b can be reliably inserted into the depressions 32b and 32a at the distal ends of the female electrode pins 3b and 3a.

次に、第１の実施形態の２極コネクタの嵌合部より後方の構造について説明する。図１に示すように、金属シース７ａ、７ｂ内に無機絶縁材粉末９２ａ、９２ｂを介在して導線８ａ、８ｂが収容されたＭＩケーブル６ａ、６ｂが、当ＭＩケーブル６ａ、６ｂと２極コネクタの嵌合部とを繋ぐ接続金具５ａ、５ｂを介して２極コネクタの嵌合部のセラミック端子本体４１ａ、４１ｂと繋がっており、導線８ａ、８ｂの嵌合側の端部はＭＩケーブル６ａ、６ｂからそれぞれ剥き出されてオスまたはメス電極ピン２ａ、２ｂ、３ａ、３ｂの末端部と導線接続部８１ａ、８１ｂにおいて溶接により接続されている。また、接続金具５ａ、５ｂの内部には無機絶縁材粉末９１ａ、９１ｂが充填されている。   Next, the structure behind the fitting part of the two-pole connector of the first embodiment will be described. As shown in FIG. 1, MI cables 6a and 6b in which conductive wires 8a and 8b are accommodated in metal sheaths 7a and 7b with inorganic insulating material powders 92a and 92b interposed therebetween are MI cables 6a and 6b and a two-pole connector. Are connected to the ceramic terminal bodies 41a and 41b of the fitting portion of the two-pole connector via connecting fittings 5a and 5b that connect the fitting portions of the lead wires 8a and 8b. 6b, and is connected to the end portions of the male or female electrode pins 2a, 2b, 3a, and 3b by welding at the conductor connecting portions 81a and 81b. Further, the inside of the connection fittings 5a and 5b is filled with inorganic insulating material powders 91a and 91b.

上述のようにオスまたはメス電極ピン２ａ、２ｂ、３ａ、３ｂとセラミック端子本体４１ａ、４１ｂは隙間無くろう付けされおり、これと同様に、セラミック本体４１ａ、４１ｂと接続金具５ａ、５ｂ、及び接続金具５ａ、５ｂと金属シース７ａ、７ｂも、隙間無くろう付けされている。このため、接続金具５ａ、５ｂの内部、及びＭＩケーブル６ａ、６ｂの金属シース７ａ、７ｂの内部は外部環境に対して密閉された状態になっていて、製作時の大気圧状態を維持しているため、真空中で使用しても接続金具５ａ、５ｂの内部及びＭＩケーブル６ａ、６ｂの内部で放電が発生する懸念がない。   As described above, the male or female electrode pins 2a, 2b, 3a, 3b and the ceramic terminal bodies 41a, 41b are brazed without gaps. Similarly, the ceramic bodies 41a, 41b, the connection fittings 5a, 5b, and the connection The metal fittings 5a and 5b and the metal sheaths 7a and 7b are also brazed without a gap. For this reason, the inside of the connection fittings 5a and 5b and the inside of the metal sheaths 7a and 7b of the MI cables 6a and 6b are sealed with respect to the external environment, and maintain the atmospheric pressure state at the time of manufacture. Therefore, there is no concern that electric discharge will occur inside the connection fittings 5a and 5b and inside the MI cables 6a and 6b even when used in a vacuum.

これに対して、２極コネクタの嵌合部は真空中にあるため放電が生じ易い。２つの電路に高電圧が付加されて放電が生じた場合の考えられる２極コネクタの嵌合部の放電経路を示す断面図が図２（ｂ）で、波線１０が放電経路である。放電は、セラミック端子筒状部４２ａの嵌合側先端面と他方のセラミック端子本体４１ｂの嵌合側表面とが接する箇所のミクロな隙間に残存する気体を通り、２つのセラミック端子筒状部４２ａ、４２ｂのうちの１つの表面に沿って進んだ後（図２（ｂ）では４２ｂの表面に沿って進んだケースを描いている）、他方のセラミック端子筒状部４２ｂの嵌合側先端面と一方のセラミック端子本体４１ａの嵌合側表面が接する箇所のミクロな隙間に残存する気体を通る経路になる。なお、図２（ａ）（ｂ）は、図５（ａ）（ｂ）、図６（ａ）（ｂ）と同様、見易くするために、嵌合部の絶縁部材であるセラミック端子筒状部４２ａとセラミック端子本体４１ｂとの間、セラミック端子筒状部４２ｂとセラミック端子本体４１ａとの間の隙間を強調して描いており、これは後掲の図４も同じである。また、図２（ｂ）は図５（ｃ）、図６（ｃ）と同様、断面を表すハッチングは描いていない。   On the other hand, since the fitting portion of the two-pole connector is in a vacuum, discharge is likely to occur. FIG. 2B is a cross-sectional view showing a discharge path of a fitting portion of a two-pole connector when a high voltage is applied to two electric paths and a discharge occurs, and a broken line 10 is a discharge path. The discharge passes through the gas remaining in the micro gap at the place where the fitting side tip surface of the ceramic terminal cylindrical portion 42a and the fitting side surface of the other ceramic terminal body 41b are in contact with each other, and the two ceramic terminal cylindrical portions 42a. , 42b (shown in FIG. 2 (b) is a case that has advanced along the surface of 42b), and then the other ceramic terminal cylindrical portion 42b is fitted on the front end surface. And a path through which the gas remaining in the micro gap in the place where the fitting-side surface of one ceramic terminal body 41a contacts. 2 (a) and 2 (b) are similar to FIGS. 5 (a) and 5 (b) and FIGS. 6 (a) and 6 (b), for the sake of clarity, the ceramic terminal tubular portion which is an insulating member of the fitting portion. The gap between the ceramic terminal body 41b and the ceramic terminal body 42b is drawn with emphasis on the gap between the terminal 42a and the ceramic terminal body 41b, and this is the same in FIG. Further, FIG. 2 (b) does not depict the hatching representing the cross section, similar to FIGS. 5 (c) and 6 (c).

電路のうち放電の発生する部分の面積は、一方のセラミック端子筒状部４２ａの嵌合側先端面と他方のセラミック端子本体４１ｂの嵌合側表面との隙間に面した他方のメス電極ピン３ｂの表面のうち、他方のセラミック端子筒状部４２ｂ側の表面、及び、他方のセラミック端子筒状部４２ｂの嵌合側先端面と一方のセラミック端子本体４１ａの嵌合側表面との隙間に面した一方のメス電極ピン３ａの表面のうち、一方のセラミック端子筒状部４２ａ側の表面である。   The area of the portion of the electric circuit where discharge occurs is the other female electrode pin 3b facing the gap between the fitting-side tip surface of one ceramic terminal cylindrical portion 42a and the fitting-side surface of the other ceramic terminal body 41b. Of the other ceramic terminal cylindrical portion 42b and the gap between the mating side tip surface of the other ceramic terminal cylindrical portion 42b and the mating side surface of one ceramic terminal body 41a. Of the surfaces of the one female electrode pin 3a, the surface on the one ceramic terminal cylindrical portion 42a side.

この放電の発生する電路の面積は、絶縁部材の隙間に面する他方のメス電極ピン３ｂの一部と一方のメス電極ピン３ａの一部であるので、同程度の寸法の従来の同軸型真空中２極コネクタと比べると、大幅に狭い面積となっていて、このため従来のものより放電開始電圧が高く、放電が生じ難い。このことは、前述した貫通孔４３ａ、４４ａ、４３ｂ、４４ｂに挿通されるオスまたはメス電極ピン２ａ、２ｂ、３ａ、３ｂのオス、メスの入れ替えがあっても同じである。   Since the area of the electric path where this discharge occurs is a part of the other female electrode pin 3b facing the gap between the insulating members and a part of the one female electrode pin 3a, the conventional coaxial vacuum of the same size is used. Compared with the middle two-pole connector, the area is significantly narrower. Therefore, the discharge starting voltage is higher than that of the conventional connector, and discharge is less likely to occur. This is the same even if the male or female electrode pins 2a, 2b, 3a, 3b inserted through the through holes 43a, 44a, 43b, 44b are replaced.

また、セラミック端子筒状部４２ａ、４２ｂを長くし、それに応じてオス電極ピン２ａ、２ｂとメス電極ピン３ａ、３ｂのセラミック端子本体４１ａ、４１ｂから嵌合部側に出た部分を長くすることによって放電経路を長くすることができ、放電開始電圧が実用電圧より低い場合には、こうすることによって容易に放電開始電圧を高めることができる特徴を持っている。   Also, the ceramic terminal cylindrical portions 42a and 42b are lengthened, and the portions of the male electrode pins 2a and 2b and the female electrode pins 3a and 3b that protrude from the ceramic terminal bodies 41a and 41b toward the fitting portion are lengthened accordingly. Thus, the discharge path can be lengthened, and when the discharge start voltage is lower than the practical voltage, the discharge start voltage can be easily increased by doing so.

さらに、従来の同軸型真空中２極コネクタは電路が外面に露出しているために電位がある物体に接すると電路による正常な伝送ができなくなるのに対し、本実施形態によるコネクタ１ａ、１ｂは電路が絶縁部材であるセラミック端子本体４１ａ、４１ｂ、及び無機絶縁材粉末９１ａ、９１ｂ、９２ａ、９２ｂで囲まれているために、電位のある物体に接しても機能が損なわれることが無く、配置の自由度が高まる。   Further, since the conventional coaxial type two-pole connector in a vacuum is exposed on the outer surface, normal transmission by the electric circuit cannot be performed when it comes in contact with a potential object, whereas the connectors 1a and 1b according to the present embodiment Since the electric circuit is surrounded by the ceramic terminal bodies 41a and 41b, which are insulating members, and the inorganic insulating material powders 91a, 91b, 92a and 92b, the function is not impaired even if it comes into contact with an object with potential, and the arrangement The degree of freedom increases.

コネクタ１ａ、１ｂの結合状態において、オス電極ピン２ａ、２ｂの先端部とメス電極ピン３ｂ、３ａの窪み３２ｂ、３２ａとの摩擦抵抗が小さく、コネクタ１ａとコネクタ１ｂが使用中に外れる恐れがある場合は、両コネクタ１ａ、１ｂの位置が結合状態の位置から動かないように固定する機構を設けたプレート等を追加することによって、外れることを防止できる。また、径の増加が許される場合は、セラミック端子筒状部４２ａ、４２ｂの設けられていない貫通孔４４ａ、４４ｂの位置にも、セラミック端子筒状部４２ｂ、４２ａの外面に接する内面を持つ筒状部を設け、コネクタ１ａ、１ｂの結合時はこの筒状部の内面とセラミック端子筒状部４２ａ、４２ｂの外面との摩擦力によって結合を維持してもよい。後者の場合、放電経路を長くして放電開始電圧を上げる効果もある。   In the coupled state of the connectors 1a and 1b, the frictional resistance between the tips of the male electrode pins 2a and 2b and the recesses 32b and 32a of the female electrode pins 3b and 3a is small, and the connector 1a and the connector 1b may be disconnected during use. In this case, it is possible to prevent the two connectors 1a and 1b from being detached by adding a plate or the like provided with a mechanism for fixing the connectors 1a and 1b so that they do not move from the coupled position. When the increase in diameter is allowed, a cylinder having an inner surface in contact with the outer surface of the ceramic terminal cylindrical portions 42b and 42a also at the positions of the through holes 44a and 44b where the ceramic terminal cylindrical portions 42a and 42b are not provided. When the connectors 1a and 1b are coupled, the coupling may be maintained by the frictional force between the inner surface of the cylindrical portion and the outer surface of the ceramic terminal cylindrical portions 42a and 42b. In the latter case, there is an effect of increasing the discharge start voltage by lengthening the discharge path.

この第１の実施形態の２極コネクタの嵌合部、接続金具５ａ、５ｂ及びＭＩケーブル６ａ、６ｂは、金属ならびに無機絶縁材であるセラミックと無味絶縁材粉末を材質としているので、少なくとも数１００℃の高温で使用することができる。   Since the fitting portion of the two-pole connector, the connection fittings 5a and 5b, and the MI cables 6a and 6b of the first embodiment are made of metal and ceramic which is an inorganic insulating material and tasteless insulating material powder, at least several hundreds. Can be used at a high temperature of ℃.

試作例での主な材質を挙げると、セラミック端子４ａ、４ｂはアルミナセラミック、オス電極ピン２ａ、２ｂ及びメス電極ピン３ａ、３ｂは銅系金属、接続金具５ａ、５ｂと金属シース７ａ、７ｂはＳＵＳ３１６Ｌ、導線８ａ、８ｂは銅、無機絶縁材粉末９１ａ、９１ｂ、９２ａ、９２ｂはマグネシア粉末とした。また、主要寸法は、接続金具５ａ、５ｂの外径が約１．５ｃｍ、金属シース７ａ、７ｂの外径が０．５ｃｍ弱でセラミック端子筒状部４２ａ、４２ｂの長さが５ｃｍ弱とした。   The main materials in the prototype are: ceramic terminals 4a and 4b are alumina ceramics, male electrode pins 2a and 2b and female electrode pins 3a and 3b are copper-based metals, connection fittings 5a and 5b and metal sheaths 7a and 7b are SUS316L, conducting wires 8a and 8b were copper, and inorganic insulating material powders 91a, 91b, 92a and 92b were magnesia powder. Also, the main dimensions are that the outer diameter of the connection fittings 5a and 5b is about 1.5 cm, the outer diameter of the metal sheaths 7a and 7b is less than 0.5 cm, and the length of the ceramic terminal tubular portions 42a and 42b is less than 5 cm. .

この第１の実施形態の試作例における耐電圧データ、つまり放電の生じない電路間の電圧を測定したデータを図３に示す。これは、空気より放電の生じ易いアルゴンガス中で測定したものである。パッシェンの法則により、圧力が約４００Ｐａに下がるまでは圧力の下降とともに耐電圧も下降し、それより圧力が下がると放電経路となる気体の希薄化により耐電圧は上昇している。   FIG. 3 shows the withstand voltage data in the prototype example of the first embodiment, that is, data obtained by measuring the voltage between the electric circuits where no discharge occurs. This is measured in an argon gas that is more susceptible to discharge than air. According to Paschen's law, the withstand voltage decreases as the pressure decreases until the pressure decreases to about 400 Pa, and when the pressure decreases further, the withstand voltage increases due to dilution of the gas that forms the discharge path.

図３から、全真空圧力域に亘って１０００Ｖの電圧が電路間に付加されても放電が生じないことが解る。従来のこのような小型の接続部では、全真空圧力域において１０００Ｖの電圧に対して放電が生じないようにすることは困難であり、本発明の効果が確認された。   It can be seen from FIG. 3 that no discharge occurs even when a voltage of 1000 V is applied across the electric circuit over the entire vacuum pressure range. In such a conventional small connection portion, it is difficult to prevent discharge from occurring at a voltage of 1000 V in the entire vacuum pressure range, and the effect of the present invention has been confirmed.

（第２の実施形態）
本発明による第２の実施形態のコネクタの結合後の嵌合部断面図を図４（ａ）に示す。第１の実施形態との違いは、セラミック端子本体４１ａ、４１ｂとセラミック端子筒状部４２ａ、４２ｂが分けて作られ、セラミック端子筒状部４２ａ、４２ｂの後端部がセラミック端子本体４１ａ、４１ｂの嵌合側の面に設けられた有底穴に差し込まれている点である。当有底穴とそれに差し込まれたセラミック端子筒状部４２ａ、４２ｂの後端部とはセラミック接着剤で接着されている。
ここで、図４（ａ）（ｂ）（ｃ）（ｄ）中の部品または部分で、図１に示した第１の実施形態と同じ役割の部品、部分には、形状が異なっている場合でも図１と同じ符号を付している。 (Second Embodiment)
FIG. 4A shows a cross-sectional view of the fitting portion after the connector of the second embodiment according to the present invention is coupled. The difference from the first embodiment is that the ceramic terminal main bodies 41a and 41b and the ceramic terminal cylindrical portions 42a and 42b are separately formed, and the rear end portions of the ceramic terminal cylindrical portions 42a and 42b are ceramic terminal main bodies 41a and 41b. It is the point inserted in the bottomed hole provided in the surface by the side of this. The bottom hole and the rear end portions of the ceramic terminal cylindrical portions 42a and 42b inserted therein are bonded with a ceramic adhesive.
Here, in the parts or portions in FIGS. 4A, 4B, 4C, and 4D, the parts and portions having the same roles as those in the first embodiment shown in FIG. 1 have different shapes. However, the same reference numerals as those in FIG.

なお、図４（ａ）において、セラミック端子本体４１ａ、４１ｂに有底穴を設けずに、セラミック端子筒状部４２ａ、４２ｂをセラミック端子本体４２ａ、４２ｂの嵌合側の面にセラミック接着剤により取り付けてもよい。   In FIG. 4 (a), the ceramic terminal main bodies 41a and 41b are not provided with bottomed holes, and the ceramic terminal cylindrical portions 42a and 42b are attached to the mating side surfaces of the ceramic terminal main bodies 42a and 42b with a ceramic adhesive. It may be attached.

セラミック接着剤は耐熱性があるために高温で使用できるのは第１の実施形態と同じで、その他の効果、特徴も第１の実施形態と同じである。   Since the ceramic adhesive has heat resistance, it can be used at a high temperature as in the first embodiment, and other effects and features are the same as those in the first embodiment.

（第３の実施形態）
本発明による第３の実施形態のコネクタの結合後の嵌合部断面図を図４（ｂ）に示す。第２の実施形態との違いは、メス電極ピン３ａ、３ｂの先端部３１ａ、３１ｂの最大径は、メス電極ピン３ａ、３ｂの他の部分と径が等しい点である。 (Third embodiment)
FIG. 4B is a cross-sectional view of the fitting portion after the connector of the third embodiment according to the present invention is coupled. The difference from the second embodiment is that the maximum diameters of the tip portions 31a and 31b of the female electrode pins 3a and 3b are equal in diameter to other portions of the female electrode pins 3a and 3b.

メス電極ピン３ａ、３ｂが第１の実施形態及び第２の実施形態に比べて太い分、放電の発生する部分の面積が若干増えるが、放電開始電圧への影響は微小である。その他の効果、特徴は第２の実施形態と同じである。なお、図４（ｂ）では、セラミック端子筒状部４２ａ、４２ｂを第２の実施形態の構造にしているが、本実施形態のメス電極ピン３ａ、３ｂは、セラミック端子筒状部４２ａ、４２ｂが第１の実施形態の構造の場合についても適用できる。   Since the female electrode pins 3a and 3b are thicker than those in the first and second embodiments, the area where the discharge occurs is slightly increased, but the influence on the discharge start voltage is small. Other effects and features are the same as those of the second embodiment. In FIG. 4B, the ceramic terminal cylindrical portions 42a and 42b have the structure of the second embodiment, but the female electrode pins 3a and 3b of the present embodiment have ceramic terminal cylindrical portions 42a and 42b. Is also applicable to the case of the structure of the first embodiment.

（第４の実施形態）
本発明による第４の実施形態のコネクタの結合後の嵌合部断面図を図４（ｃ）に示す。第１の実施形態との違いは、メス電極ピン３ａ、３ｂの窪み３２ａ、３２ｂの先端にテーパーを付けて窪み３２ａ、３２ｂの先端が広がった形状とすることにより、オス電極ピン２ａ、２ｂの先端部がメス電極ピン３ｂ、３ａ先端の窪み３２ｂ、３２ａに、さらに確実に差し込まれるようにした点である。その他の効果、特徴は第１の実施形態と同じである。なお、図４（ｃ）では、セラミック端子筒状部４２ａ、４２ｂを第１の実施形態の構造にしているが、本実施形態のメス電極ピン３ａ、３ｂは、セラミック端子筒状部４２ａ、４２ｂが第２の実施形態の構造の場合についても適用できる。 (Fourth embodiment)
FIG. 4C shows a cross-sectional view of the fitting portion after the connector of the fourth embodiment according to the present invention is coupled. The difference from the first embodiment is that the tips of the recesses 32a and 32b of the female electrode pins 3a and 3b are tapered so that the tips of the recesses 32a and 32b are widened. The point is that the tip end portion is inserted more securely into the recesses 32b, 32a at the tip end of the female electrode pins 3b, 3a. Other effects and features are the same as in the first embodiment. In FIG. 4C, the ceramic terminal cylindrical portions 42a and 42b have the structure of the first embodiment, but the female electrode pins 3a and 3b of the present embodiment have ceramic terminal cylindrical portions 42a and 42b. However, this can also be applied to the case of the structure of the second embodiment.

（第５の実施形態）
本発明による第５の実施形態のコネクタの結合後の嵌合部断面図を図４（ｄ）に示す。第２の実施形態との違いは、セラミック端子本体４１ａ、４１ｂの嵌合側表面を、他方のコネクタのセラミック端子筒状部４２ｂ、４２ａの嵌合側先端面が略接する部分にザグリ４０ａ、４０ｂが設けられている表面とし、一対のコネクタを接合すると、一方のセラミック端子本体４１ａ、４１ｂのザグリ４０ａ、４０ｂの底部表面に他方のコネクタのセラミック端子筒状部４２ｂ、４２ａの嵌合側先端面が互いに略接した状態となる構造とした点である。こうすることによって、放電経路が２つのザグリ４０ａ、４０ｂの深さ分長くなり、放電開始電圧をさらに上げることができる。その他の効果、特徴は第２の実施形態と同じである。なお、図４（ｄ）では、メス電極ピン３ａ、３ｂ、及びセラミック端子筒状部４２ａ、４２ｂを第２の実施形態の形状、構造にしているが、本実施形態は、メス電極ピン３ａ、３ｂが第３または第４の実施形態の形状の場合にも適用できるし、セラミック端子筒状部４２ａ、４２ｂが第１の実施形態の構造の場合にも適用できる。 (Fifth embodiment)
FIG. 4D shows a cross-sectional view of the fitting portion after the connector of the fifth embodiment according to the present invention is coupled. The difference from the second embodiment is that the mating side surfaces of the ceramic terminal bodies 41a and 41b are countersunk to the portions where the mating side end surfaces of the ceramic terminal cylindrical portions 42b and 42a of the other connector are substantially in contact. When a pair of connectors are joined to each other, the bottom surface of the counterbore 40a, 40b of one of the ceramic terminal bodies 41a, 41b is fitted to the end surface of the mating side of the ceramic terminal cylindrical portions 42b, 42a of the other connector. Is a structure in which the two are substantially in contact with each other. By doing so, the discharge path becomes longer by the depth of the two counterbore 40a and 40b, and the discharge start voltage can be further increased. Other effects and features are the same as those of the second embodiment. 4D, the female electrode pins 3a and 3b and the ceramic terminal cylindrical portions 42a and 42b have the shape and structure of the second embodiment. However, in the present embodiment, the female electrode pins 3a, 3b can be applied to the shape of the third or fourth embodiment, and can also be applied to the case where the ceramic terminal cylindrical portions 42a and 42b have the structure of the first embodiment.

以上、本発明を実施するための形態を示したが、本発明は、もとより上記実施形態によって制限を受けるものではなく、本発明の趣旨に適合し得る範囲で適当に変更を加えて実施することも勿論可能であり、それらは何れも本発明の技術的範囲に包含される。   As mentioned above, although the form for implementing this invention was shown, this invention is not restrict | limited by the said embodiment from the first, and it implements it adding a change suitably in the range which can be adapted to the meaning of this invention. Of course, these are all possible and are included in the technical scope of the present invention.

本発明による嵌合部構造を用いた２極コネクタは、核融合装置の真空容器内や加速器の真空容器内等の高温の真空容器内に設置するコネクタとして使用でき、特に、磁気計測センサ等の高電圧信号を伝送する電路を繋ぐ放電開始電圧の高い小型コネクタとして効果を発揮する。   The two-pole connector using the fitting part structure according to the present invention can be used as a connector installed in a high-temperature vacuum vessel such as a fusion vessel vacuum vessel or an accelerator vacuum vessel. It is effective as a small connector with a high discharge starting voltage that connects the electric circuit for transmitting a high voltage signal.

１ａ、１ｂ コネクタ
２ａ、２ｂ オス電極ピン
３ａ、３ｂ メス電極ピン
３１ａ、３１ｂ 先端部
３２ａ、３２ｂ 窪み
４ａ、４ｂ セラミック端子
４１ａ、４１ｂ セラミック端子本体
４２ａ、４２ｂ セラミック端子筒状部
４３ａ、４３ｂ 貫通孔（セラミック端子筒状部側）
４４ａ、４４ｂ 貫通孔（反セラミック端子筒状部側）
５ａ、５ｂ 接続金具
６ａ、６ｂ ＭＩケーブル
７ａ、７ｂ 金属シース
８ａ、８ｂ 導線
９１ａ、９１ｂ 無機絶縁材粉末（接続金具内）
９２ａ、９２ｂ 無機絶縁材粉末（ＭＩケーブル内）
１０ 放電経路
1a, 1b Connector 2a, 2b Male electrode pin 3a, 3b Female electrode pin 31a, 31b Tip part 32a, 32b Depression 4a, 4b Ceramic terminal 41a, 41b Ceramic terminal body 42a, 42b Ceramic terminal cylindrical part 43a, 43b Through-hole ( Ceramic terminal tube side)
44a, 44b Through hole (anti-ceramic terminal cylindrical part side)
5a, 5b Connection fittings 6a, 6b MI cables 7a, 7b Metal sheaths 8a, 8b Conductive wires 91a, 91b Inorganic insulating powder (in the connection fittings)
92a, 92b Inorganic insulation powder (inside MI cable)
10 Discharge path

Claims (7)

真空中で使用され、一対のコネクタからなる２極コネクタの嵌合部構造であって、
該嵌合部は、一対の前記コネクタの各方に１つのセラミック端子と、両方で二対のオス電極ピンとメス電極ピンで構成され、
前記オス電極ピンは、金属を材質とした曲がりのない棒形状であり、
前記メス電極ピンは、金属を材質とした曲がりのない棒形状であって、先端に、前記オス電極ピンの先端部が差し込まれる軸方向の窪みのある部分が設けられており、
前記セラミック端子は、絶縁性セラミックが材質で、セラミック端子本体とセラミック端子筒状部よりなり、
前記セラミック端子本体は、結合方向に平行な２つの貫通孔が設けられていて、それらの貫通孔の其々には前記オス電極ピンまたは前記メス電極ピンが先端を嵌合側にして挿通され、該オス電極ピンまたは該メス電極ピンはメタライズされた該貫通孔の全面と隙間無くろう付けされて固定されており、
前記セラミック端子筒状部は、筒形状で、前記セラミック端子本体の嵌合側にあって、軸方向が結合方向と平行に、該セラミック端子本体の１つの前記貫通孔が該セラミック端子筒状部の内側の孔の中央になる位置に設けられていて、該貫通孔に固定されている前記オス電極ピンまたは前記メス電極ピンの嵌合部側の先端部は、該セラミック端子筒状部の嵌合側先端より前記セラミック端子本体側に位置しており、
一対の前記コネクタを結合すると、一方の該コネクタの前記セラミック端子筒状部内の前記オス電極ピンまたは前記メス電極ピンと、それと対になる他方の該コネクタの前記セラミック端子筒状部の外にある前記メス電極ピンまたは前記オス電極ピンとが、該オス電極ピンの先端部が該メス電極ピンの先端部の前記窪みに差し込まれることによって電路を対毎に合わせて２つ形成し、また、一方の前記コネクタの前記セラミック端子筒状部の嵌合側先端面は他方の前記セラミック端子本体の嵌合側表面に互いに略接した状態となる２極コネクタの嵌合部構造。 A fitting part structure of a two-pole connector used in a vacuum and comprising a pair of connectors,
The fitting portion is composed of one ceramic terminal on each side of the pair of connectors, and two pairs of male electrode pins and female electrode pins.
The male electrode pin is a rod-shaped rod made of metal and made of a material,
The female electrode pin is a rod-shaped rod made of a metal material, and is provided at the tip with a portion having an axial recess into which the tip of the male electrode pin is inserted,
The ceramic terminal is made of an insulating ceramic material, and is composed of a ceramic terminal body and a ceramic terminal cylindrical portion.
The ceramic terminal body is provided with two through holes parallel to the coupling direction, and the male electrode pin or the female electrode pin is inserted into each of the through holes with the tip as a fitting side, The male electrode pin or the female electrode pin is fixed by being brazed to the entire surface of the metallized through hole without a gap,
The ceramic terminal cylindrical portion is cylindrical and is on the fitting side of the ceramic terminal main body, the axial direction is parallel to the coupling direction, and one through hole of the ceramic terminal main body is the ceramic terminal cylindrical portion. The male electrode pin or the female electrode pin fixed to the through hole is provided at the center of the inner hole of the ceramic electrode cylindrical portion. It is located on the ceramic terminal body side from the end of the mating side,
When the pair of connectors are coupled, the male electrode pin or the female electrode pin in the ceramic terminal cylindrical portion of one of the connectors and the ceramic terminal cylindrical portion of the other connector paired with the male electrode pin are outside the ceramic terminal cylindrical portion. The female electrode pin or the male electrode pin forms two electric paths for each pair by inserting the tip of the male electrode pin into the recess of the tip of the female electrode pin. A fitting part structure of a two-pole connector in which the fitting side end face of the ceramic terminal cylindrical part of the connector is in a state of being substantially in contact with the fitting side surface of the other ceramic terminal body. 前記オス電極ピンの先端に、外形が先細りの部分を設けた請求項１に記載の２極コネクタの嵌合部構造。   The fitting part structure for a two-pole connector according to claim 1, wherein a tip portion of the male electrode pin has a tapered outer shape. 前記メス電極ピンの先端に、外形が先細りで、該メス電極ピンの他の部分に比べて最大径が等しいかまたは大きく、該最大径の部分は前記セラミック端子筒状部の内側の孔に略接する形状で、かつ前記オス電極ピンの先端部が差し込まれる軸方向の前記窪みがある部分が設けられた請求項２に記載の２極コネクタの嵌合部構造。   At the tip of the female electrode pin, the outer shape is tapered, and the maximum diameter is equal to or larger than the other part of the female electrode pin, and the part of the maximum diameter is approximately in the hole inside the ceramic terminal cylindrical part. The fitting part structure of the two-pole connector according to claim 2, wherein a portion having a shape in contact with the depression in the axial direction into which a tip portion of the male electrode pin is inserted is provided. 前記メス電極ピンの先端部は、テーパーを付けて前記窪みの先端が広がった形状とした請求項３に記載の２極コネクタの嵌合部構造。   The fitting part structure of the two-pole connector according to claim 3, wherein the tip of the female electrode pin is tapered and the tip of the recess is widened. 前記セラミック端子本体と前記セラミック端子筒状部は分けて作られ、該セラミック端子筒状部が該セラミック端子本体にセラミック接着剤で接着されている請求項１乃至４のいずれか１項に記載の２極コネクタの嵌合部構造。   The ceramic terminal main body and the ceramic terminal cylindrical part are made separately, and the ceramic terminal cylindrical part is bonded to the ceramic terminal main body with a ceramic adhesive. 2-pole connector fitting structure. 前記セラミック端子本体と前記セラミック端子筒状部は分けて作られ、該セラミック端子筒状部の後端部が該セラミック端子本体の嵌合側の面に設けられた有底穴に差し込まれてセラミック接着剤で接着されている請求項１乃至４のいずれか１項に記載の２極コネクタの嵌合部構造。   The ceramic terminal main body and the ceramic terminal cylindrical portion are made separately, and the rear end portion of the ceramic terminal cylindrical portion is inserted into a bottomed hole provided on the mating side surface of the ceramic terminal main body. The fitting part structure of the two-pole connector according to any one of claims 1 to 4, wherein the fitting part structure is bonded with an adhesive. 前記セラミック端子本体の嵌合側表面を、他方の前記コネクタの前記セラミック端子筒状部の嵌合側先端面が略接する部分にザグリが設けられている表面とし、一対の前記コネクタを結合すると、一方の該セラミック端子本体の該ザグリの底部表面に他方の該コネクタの該セラミック端子筒状部の嵌合側先端面が互いに略接した状態となる請求項１乃至６のいずれか１項に記載の２極コネクタの嵌合部構造。



When the mating side surface of the ceramic terminal body is a surface where a counterbore is provided at a portion where the mating side end surface of the ceramic terminal tubular portion of the other connector is substantially in contact, and a pair of the connectors are combined, 7. The fitting side end face of the ceramic terminal tubular part of the other connector is in a state of being substantially in contact with the bottom surface of the counterbore of one of the ceramic terminal bodies. The two-pole connector fitting part structure.



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