JP2002083653A - Coaxial connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To flatten to a shallow extent the a trough portion of a male screw in order to prevent breakage and rupture by tightening torque, in a connector component joined by tightening of the screw. SOLUTION: In a coaxial connector, in which a plug 10 and a jack 20 of a male and female connector components, having external conductors 11 and 21 and central conductors 12 and 22 are connected by screwing with the male screw 28 formed in a jack side external conductor 21, and an inside female screw 32 of a nut 30 for joining moored on a plug side external conductor 11, the coaxial connector is a screw-lock type, in which the plug and jack are connected by joining with the rotation torque of the nut 30 for joining by flattening shallowly the base portion 29 of the outside male screw 28 of the external conductor 21.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、二つのコネクタ部
材を結合用ナットを用いて締付ける同軸コネクタ、特
に、外部導体と中心導体を具備する雌雄コネクタ部材の
ジャックとプラグを結合用ナットによりねじ込み固着す
る超小形化スクリューロック方式に好適する同軸コネク
タにおける外部導体に形成するおねじ構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coaxial connector in which two connector members are fastened by using a coupling nut, and more particularly, a jack and a plug of a male and female connector member having an outer conductor and a center conductor are screwed and fixed by the coupling nut. The present invention relates to a male screw structure formed on an outer conductor of a coaxial connector suitable for a miniaturized screw lock system.

【０００２】[0002]

【従来の技術】同軸コネクタには、通常、二つのコネク
タ部材を結合用ナットを用いてねじ込み固着するスクリ
ューロック方式の同軸コネクタが知られている。この場
合、雄コネクタ部材のプラグ、雌コネクタ部材のジャッ
ク、およびプラグ側に装着した結合用ナットを同心状に
配置して構成され、結合用ナットによるねじ込み式締め
付けで両部材の電気機械的結合を行なっている。通常の
ねじ締付には、６０度の三角ねじが利用され、結合状態
では図３に示すような部分拡大図である。この場合に結
合用ナット１に形成しためねじ２がジャック側外部導体
４に形成したおねじ５上を推移して締め付けが行なわれ
る。これらのねじ構造は、通常、標準化されたねじ溝が
使用され、例えば、ＪＩＳ−Ｂ０２０８のユニファイ細
目ねじが適用され、両コネクタ部材を締め付て結合させ
ている。2. Description of the Related Art As a coaxial connector, there is generally known a screw lock type coaxial connector in which two connector members are screwed and fixed using a coupling nut. In this case, the plug of the male connector member, the jack of the female connector member, and the coupling nut mounted on the plug side are arranged concentrically, and the electromechanical coupling of both members is performed by screwing-in tightening with the coupling nut. I do. A 60-degree triangular screw is used for normal screw tightening, and is a partially enlarged view as shown in FIG. 3 in a connected state. In this case, since the screw 2 is formed on the coupling nut 1, the screw 2 moves on the male screw 5 formed on the jack-side outer conductor 4 and is tightened. In these screw structures, a standardized screw groove is usually used, for example, a JIS-B0208 unified fine screw is applied, and both connector members are tightened and connected.

【０００３】マイクロ波信号を伝送する高周波用同軸コ
ネクタは、所望の伝送特性を得るために、外部導体の平
端面は互いに正確に当接するようにされ、中心導体は互
いに直径を等しくされ、両導体間の誘電体は損失の小さ
い同質材が用いられ、かつプラグとジャックも同様の外
形形態にされる。特に、平端面間の相性で決まる電気的
性能は結合用のねじのサイズ、形状、タイプなどで個々
に異なる。換言すると、コネクタ部材のプラグとジャッ
クの機械的性能と共に信号伝達に必要な電気的性能は個
々の使用部品に影響され、小形タイプの場合には機械的
クリアランスを小さくするねじの締め付けが必要とな
る。例えば、小形タイプの同軸コネクタでは中空の外部
導体のねじ部分の肉厚が部分的に薄くなって結合用ナッ
トの締め付け時に所望するトルクで締め付けが出来なく
なったり、あるいは締付中にねじ部の破壊や損傷を伴う
ことが生ずる。ねじの締め付けが緩やかであれば満足す
る当接接合が得られず信号伝達に不具合を生じ、逆に強
く締め付けると肉薄部の外部導体に破損または破壊を生
ずる。図３に示す模式図は６０度の三角ねじである。具
体的に６０度正三角形の底辺がピッチＰ、高さがとがり
高さＨと呼ばれる。このとがり高さＨは三角ねじの上下
の頂点間の垂直距離である。ねじ作用は、このとがり山
の高さＨの範囲内にあるひっかかりの高さＨ１と呼ばれ
る部分で機能し決定される。ジャック側外部導体４のお
ねじ５を６０度の三角ねじで構成する場合、その頂点６
と底点７のとがり高さＨの間におねじの山部分８と谷部
分９が形成される。しかし、ナット１のめねじ２の山部
分の頂面とおねじ５の谷部分９との間には空間が形成さ
れ、それによって中空状の外部導体４に形成したおねじ
５の谷部分９では外部導体の基部肉厚が薄くなる。これ
がために締め付けによる不具合や破壊を引き起こす。超
小形の同軸コネクタ（ＥＳＭＡタイプと呼ぶ）の場合、
ジャック側外部導体４の外周面に形成するおねじ５（＃
６−４０ＵＮＦ）は、その谷部分９が溝状に深く切削さ
れており、中空の外部導体内面壁側の厚さが最も薄くな
る。具体的に肉厚が０．０２５ｍｍで設計上のミニマム
値になり、その際のねじ破壊力は約１９．６Ｎ／ｃｍ
（２ｋｇｆ・ｃｍ）であることが判明し、このような場
合のねじの締め付けによる機械的結合は破壊力のミニマ
ム値より小さいトルクでの締付けしかできず固着強度と
結合作業の安定化に問題が残されていた。締め付けが強
ければ破損、破壊という不具合が生じ、緩い締付けでは
電気的特性の悪化を招き満足な伝送特性が得られない。In a high-frequency coaxial connector for transmitting a microwave signal, in order to obtain desired transmission characteristics, the flat end surfaces of the outer conductors are made to abut exactly with each other, the center conductors are made equal in diameter, and both conductors are made equal. The dielectric between them is made of the same material with low loss, and the plug and the jack have the same outer shape. In particular, the electrical performance determined by the compatibility between the flat end faces differs depending on the size, shape, type, and the like of the connecting screw. In other words, the electrical performance required for signal transmission together with the mechanical performance of the plug and jack of the connector member is affected by the individual components used, and in the case of a small type, it is necessary to tighten the screws to reduce the mechanical clearance . For example, in the case of a small-sized coaxial connector, the screw thickness of the hollow outer conductor is partially thinned, so that it is not possible to tighten with the desired torque when tightening the coupling nut, or the thread is broken during tightening. And damage may occur. If the screws are loosely tightened, a satisfactory abutting connection cannot be obtained, causing a problem in signal transmission. Conversely, if the screws are tightened too strongly, the thin outer conductor may be damaged or broken. The schematic diagram shown in FIG. 3 is a 60-degree triangular screw. Specifically, the base of the 60-degree equilateral triangle is called the pitch P, and the height is called the pointed height H. This point height H is the vertical distance between the upper and lower vertices of the triangular screw. The screw action is operative and determined in a portion called the catch height H1 that lies within the height H of this point. When the male screw 5 of the jack-side outer conductor 4 is formed of a 60-degree triangular screw, its apex 6
The crest portion 8 and the valley portion 9 of the male screw are formed between the tip height H of the bottom point 7. However, a space is formed between the top surface of the ridge of the female screw 2 of the nut 1 and the valley 9 of the male screw 5, whereby the valley 9 of the male screw 5 formed in the hollow outer conductor 4 is formed. The base thickness of the outer conductor is reduced. This causes malfunctions and breakage due to tightening. In the case of a micro coaxial connector (called ESMA type),
Male screw 5 (#) formed on the outer peripheral surface of jack-side external conductor 4
6-40UNF), the valley portion 9 is deeply cut into a groove shape, and the thickness of the inner wall surface side of the hollow outer conductor becomes the thinnest. Specifically, the wall thickness is 0.025 mm, which is the minimum value in design, and the screw breaking force at that time is about 19.6 N / cm.
(2 kgf · cm). In such a case, the mechanical connection by tightening the screw can only be performed with a torque smaller than the minimum value of the destructive force. Was left. If the tightening is too strong, breakage or destruction occurs, and if the tightening is loose, the electrical characteristics are degraded and satisfactory transmission characteristics cannot be obtained.

【０００４】締め付け部品の機械要素であるねじは、日
本工業規格ＪＩＳにおいて、機械構成上の基本的な部品
として仕組み、動作原理、使用法、使用限界を正しく理
解して機械設計されるように規定している。ねじの使途
としてボルトナットによる場合締付、増力、送りの三つ
の作用があり、螺旋溝は緩めたり締めたりすることが自
在にできるものとされ、また、ねじの基本的な働きは回
転運動を直線運動への変換であり、ねじの逆効率セルフ
ブロッキングはねじの緩みを防ぐためになくてはならな
い重要な現象である。特に、締付用ねじは頂角が６０度
の三角ねじが使われるのに対し、増力や送りを目的に使
用するねじは効率のよい台形ねじが使われる。台形ねじ
は頂角が３０度の三角ねじの山の頂部を切り、谷を埋め
たものに相当するが、雌雄ねじが正しく組み合っている
ことが条件となる。しかし、このような規格化されたね
じにも一長一短があり、同軸コネクタでは締め付け用と
して頂角６０度の三角ねじを使用するとき、前述するよ
うに中空の外部導体の外周面に形成するおねじの谷部分
が機械的強度不足の不具合を生ずることが判明した。三
角ねじでの螺合は、ナットの内面に形成されためねじの
山部分の頂面に平坦部を形成して外部導体外周面上に形
成されたおねじに噛み合い、ナットの回転トルクにより
締め付け作用が生じ、かつねじの推進力作用で外部導体
の平端面間が当接する位置に水平にシフトされる。この
際、付与するトクルが強ければ強いほど良好な結合状態
を得るのであるが、マイクロ波通信機器に利用される小
形同軸コネクタの場合、図３に示すように、中空の外部
導体のおねじ５がその谷部分９の肉薄化により破損や破
壊による不具合が顕著に現われ、満足な回転トルクを付
与しての締め付けが困難となるり、この解決策が要望さ
れている。Screws, which are mechanical elements of fastening parts, are stipulated in the Japanese Industrial Standards JIS as basic parts of a machine configuration so that the mechanism, operating principle, usage, and usage limit are properly understood and machine designed. are doing. In the case of bolts and nuts, the screw is used for three functions: tightening, boosting, and feeding.The helical groove can be loosened and tightened freely. Conversion to linear motion, screw reverse efficiency self-blocking is an important phenomenon that is essential to prevent screw loosening. In particular, a triangular screw having a vertical angle of 60 degrees is used as a tightening screw, while an efficient trapezoidal screw is used as a screw used for boosting or feeding. A trapezoidal screw is equivalent to a triangular screw with a vertex angle of 30 degrees cut off the top of a crest and filling a valley, provided that the male and female screws are correctly combined. However, such standardized screws also have advantages and disadvantages. When a coaxial connector uses a triangular screw with a vertical angle of 60 degrees for tightening, as described above, a male screw formed on the outer peripheral surface of the hollow outer conductor is used. It has been found that the valley portion of the steel sheet causes a problem of insufficient mechanical strength. The screwing with the triangular screw is formed on the inner surface of the nut, so a flat portion is formed on the top surface of the threaded portion and meshes with the male screw formed on the outer conductor outer peripheral surface, and the nut is tightened by the rotating torque. Occurs, and the screw is horizontally shifted to a position where the flat end faces of the outer conductor come into contact with each other due to the driving force of the screw. At this time, the stronger the applied torque, the better the connection state is. However, in the case of a small coaxial connector used for microwave communication equipment, as shown in FIG. However, due to the thinning of the valley portion 9, a problem due to breakage or destruction appears remarkably, and it becomes difficult to apply a sufficient rotational torque to tighten, and there is a demand for this solution.

【０００５】[0005]

【発明が解決しようとする課題】したがって、本発明は
上述する欠点に鑑みこれらを排除するために提案された
ものであり、雌雄二つのコネクタ部材であるプラグとジ
ャックを結合用ナットにより締め付けて所定の機械的電
気的特性を得る同軸コネクタにおいて、締付強度を保証
するトルク付与ができる新規かつ改良された同軸コネク
タの提供を目的とする。特に、コネクタ部材に破損や破
壊を招くことなく充分の締付強度で機械的結合を達成す
るために、外部導体の外周面に形成するおねじの形状構
造に着目した新規で改良された小形タイプの同軸コネク
タを提供することにある。SUMMARY OF THE INVENTION Accordingly, the present invention has been proposed in view of the above-mentioned drawbacks, and has been proposed in order to eliminate the drawbacks. An object of the present invention is to provide a new and improved coaxial connector capable of applying a torque for assuring the tightening strength in a coaxial connector having the above mechanical and electrical characteristics. In particular, a new and improved small type that focuses on the shape and structure of the external thread formed on the outer peripheral surface of the outer conductor in order to achieve mechanical coupling with sufficient tightening strength without causing damage or destruction to the connector member To provide a coaxial connector.

【０００６】[0006]

【課題を解決するための手段】本発明によれば、外部導
体と中心導体が絶縁材を介して同心状に配置構成する雌
雄コネクタ部材を、一方の外部導体に係留した結合用ナ
ットの内周面に形成しためねじと他方の外部導体の外周
面に形成したおねじとの係合により締め付けるものであ
って、おねじの谷部分を平坦化したスクリュ−ロックね
じ込み構造の同軸コネクタが提供される。好ましくは、
両ねじは標準規格のねじであり、外部導体に切削加工し
て形成されるおねじは、その谷部分が標準規格のめねじ
の山部分の輪郭と一致するように谷溝を浅くしたことを
特徴とする。具体的には、本発明の同軸コネクタは同心
的に配置された外部導体と中心導体からなる二つのコネ
クタ部材を結合用ナットにより結合するもので、内周面
にめねじが形成された結合用ナットが一方のコネクタ部
材に回転自在に装着され、他方のコネクタ部材の外部導
体の外周面におねじが形成され、コネクタ部材の中心導
体は一方にピンを有し、他方にスロット付きピン受入孔
を有し、結合用ナットの内面めねじを外部導体の外面お
ねじに係合して回転推進させ、中心導体のピンを受入孔
に嵌合させつつ両外部導体を当接接合して結合するもの
で、外部導体の外面おねじは谷部分を台形状に略平坦に
切削加工して谷底面がナット内面めねじの山部分の平坦
な山頂面と輪郭を合致させるようにしたことを特徴とす
る。したがって、中空状外部導体の外表面に形成された
おねじの谷部分は浅くなり、外部導体の基部の実質的肉
厚を厚くしてスクリュ−ロックの際に付与される回転ト
ルクを大きくして締め付け強度の増大を図る。換言する
と、締付けに伴う外部導体の破損または破壊を防止し、
組み立て作業作業での効率化と安定化を図りつつ確実な
結合を可能にしてマイクロ波等の信号の伝達効率を高め
るものである。According to the present invention, a male / female connector member in which an outer conductor and a center conductor are concentrically arranged via an insulating material is connected to the inner periphery of a coupling nut anchored to one of the outer conductors. A screw-locked coaxial connector having a screw-lock screw-in structure in which a screw formed on the outer surface and a male screw formed on the outer peripheral surface of the other outer conductor are tightened by engagement with the screw. You. Preferably,
Both screws are standard screws, and the external thread formed by cutting the outer conductor shall have a shallow valley groove so that the valley matches the contour of the ridge of the standard female screw. Features. Specifically, the coaxial connector of the present invention connects two connector members consisting of an outer conductor and a center conductor which are arranged concentrically by a connecting nut, and has a female screw formed on an inner peripheral surface. A nut is rotatably mounted on one connector member, a screw is formed on an outer peripheral surface of an outer conductor of the other connector member, a center conductor of the connector member has a pin on one side, and a pin receiving hole with a slot on the other side. The inner female screw of the coupling nut is engaged with the outer male screw of the outer conductor to be rotationally propelled, and the outer conductor is abutted and joined while the center conductor pin is fitted in the receiving hole. The external thread of the outer conductor is cut into a trapezoidal shape with a substantially flat trough, so that the bottom of the root matches the contour of the flat top of the thread of the internal thread of the nut. I do. Therefore, the valley portion of the external thread formed on the outer surface of the hollow outer conductor becomes shallower, and the substantial thickness of the base portion of the outer conductor is increased to increase the rotational torque applied at the time of screw locking. Increase the tightening strength. In other words, prevent damage or destruction of the outer conductor due to tightening,
The purpose of the present invention is to improve the efficiency and stabilization of the assembly work while ensuring reliable coupling to increase the transmission efficiency of signals such as microwaves.

【０００７】[0007]

【発明の実施の形態】本発明の同軸コネクタは、それぞ
れに外部導体と中心導体を具備する雌雄の二つのコネク
タ部材であるプラグとジャックから成り、ジャック側外
部導体に形成したおねじと、プラグ側外部導体に回転自
在に装着したナットのめねじとの係合により結合するも
ので、おねじの谷部分を埋めるようにして浅く平坦化
し、ナットに所定の機械的回転トルクを付与してねじ込
み式に締付けるスクリュ−ロックタイプ構造である。す
なわち、誘電体の絶縁材を介した第１外部導体と第１中
心導体を具備するジャックおよび同様に誘電体の絶縁材
を介した第２外部導体と第２中心導体を具備するプラグ
の２部材を結合用ナットでねじ込み式に締付ける同軸コ
ネクタであって、ジャック側外部導体は外周面に谷部分
を浅くして平坦にしたおねじが形成され、プラグ側外部
導体には内面にめねじを有する結合用ナットがリティナ
で回動自在に係留され、これらおねじとめねじとの螺合
によりプラグおよびジャックを電気的機械的に結合する
ことを特徴とする同軸コネクタである。ここで、第１お
よび第２外部導体は先端部が平端面に形成され、第１お
よび第２中心導体の先端部にはピン部分およびピン受入
部分の電気的接触部が形成され、結合用ナットの回転運
動によりめねじをおねじに螺合させ、両平端面間を当接
させると共にピン部分をピン受入部に嵌合挿入して、結
果的にプラグおよびジャックをそれぞれの外部導体間と
共にそれぞれの中心導体間を電気的に接続し同時に機械
的に締付け固着して結合する同軸コネクタが開示され
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS A coaxial connector according to the present invention comprises a plug and a jack, which are two male and female connector members each having an outer conductor and a center conductor. The nut is rotatably mounted on the outer conductor and is engaged by engaging with the female thread.It is flattened shallowly so as to fill the valley of the male thread, and is screwed in by applying a predetermined mechanical rotation torque to the nut. It is a screw-lock type structure that is tightened to the formula. That is, a jack having a first outer conductor and a first center conductor via a dielectric insulating material and a plug also having a second outer conductor and a second center conductor via a dielectric insulating material. Is a coaxial connector that is screw-fastened with a coupling nut, the outer conductor of the jack side is formed with a flat external thread with a shallow valley on the outer peripheral surface, and the outer conductor of the plug side has an internal thread on the inner surface A coaxial connector characterized in that a coupling nut is rotatably moored by a retainer, and a plug and a jack are electrically and mechanically coupled by screwing these male and female threads. Here, the first and second outer conductors have tips formed on the flat end faces, and the tip ends of the first and second center conductors are formed with electrical contact portions of a pin portion and a pin receiving portion. The female screw is screwed into the male screw by the rotational movement of the screw, the flat end faces are brought into contact with each other, and the pin portion is fitted and inserted into the pin receiving portion. A coaxial connector is disclosed, which electrically connects the central conductors of the two and simultaneously mechanically tightens and fixes them.

【０００８】[0008]

【実施例】以下、本発明に係る実施例について図面を参
照して詳述する。図１は本発明に係る超小形同軸コネク
タ、通称ＥＳＭＡタイプコネクタの分離した状態の拡大
部分断面図を示し、図２は図１のコネクタ部材が結合し
た状態でねじ部分の要部をさらに拡大した断面を示す。
超小形化同軸コネクタは、雄コネクタ部材のプラグ１０
と、雌コネクタ部材のジャック２０と、結合用ナット３
０とから構成される。プラグ１０は外部導体１１、先端
部にピン部分１３を形成した中心導体１２、および外部
導体１１と中心導体１２を電気的に絶縁する誘電体絶縁
材１４を具備し、これらを同心状に配置して構成され
る。このプラグ１０には回動自在の結合用ナット３０が
リティナリング３１により係留して装着され、外部導体
１１と電気的に導通状態にある。一方、ジャック２０は
外部導体２１、先端部にピン受入孔２３を形成した中心
導体２２、および外部導体２１と中心導体２２を電気的
に絶縁する誘電体絶縁材２４を具備し、これらを同心状
に配置して構成される。中心導体１２、２２の各本体部
分の外径は互いに等しくされ、プラグ１０とジャック２
０の結合状態において、ジャック側中心導体２２のピン
受入孔２３の先端面２５とプラグ側中心導体１２のショ
ルダ先端面１５とは所定のクリアランス内で対向する。
ショルダ先端面１５は中心導体１２から伸び出たピン部
分１３の根元部分で放射状に広がって延びた部分であ
る。結合状態では、各外部導体１１、２１の先端端面は
互いに当接端面１６，２６となって相対向して互いに当
接する。両者の合体を安定化するために湿気防止用シリ
コンゴム製ガスケット１７が配置されている。なお、プ
ラグ側ショルダ先端面１５から伸び出るピン部分１３と
ジャック側ピン受入孔２３は一方または両方の先端部が
互いに挿入容易な形状に加工されている。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an enlarged partial cross-sectional view of a microminiature coaxial connector according to the present invention, a so-called ESMA type connector, in a separated state. FIG. 2 is an enlarged view of a main part of a screw portion in a state where the connector members of FIG. 3 shows a cross section.
The miniaturized coaxial connector has a male connector plug 10
, A female connector member jack 20 and a coupling nut 3
0. The plug 10 includes an outer conductor 11, a center conductor 12 having a pin portion 13 formed at a distal end, and a dielectric insulating material 14 for electrically insulating the outer conductor 11 from the center conductor 12, and these are arranged concentrically. It is composed. A rotatable coupling nut 30 is moored and attached to the plug 10 by a retainer ring 31, and is in an electrically conductive state with the external conductor 11. On the other hand, the jack 20 is provided with an outer conductor 21, a center conductor 22 having a pin receiving hole 23 at a tip end, and a dielectric insulating material 24 for electrically insulating the outer conductor 21 and the center conductor 22 from each other. And configured. The outer diameters of the main body portions of the center conductors 12 and 22 are made equal to each other, and the plug 10 and the jack 2
In the connection state of 0, the tip end face 25 of the pin receiving hole 23 of the jack-side center conductor 22 and the shoulder tip end face 15 of the plug-side center conductor 12 face each other within a predetermined clearance.
The shoulder tip surface 15 is a portion that extends radially at the root of the pin portion 13 extending from the center conductor 12. In the coupled state, the distal end surfaces of the outer conductors 11 and 21 become the contact end surfaces 16 and 26 so as to oppose each other and contact each other. A silicon rubber gasket 17 for preventing moisture is provided to stabilize the combination of the two. One or both of the pin portions 13 and the jack-side pin receiving holes 23 extending from the plug-side shoulder tip surface 15 are formed into a shape that allows easy insertion into each other.

【０００９】本発明の特徴であるジャック２０の外部導
体２１はその外周面におねじ２８が形成されており、そ
の断面形状は、図２に示すように、とがり山の高さＨと
ピッチＰを形成する６０度三角形状のねじであり、谷部
分２９が浅く平坦化されている。一方、結合用ナット３
０のめねじ３２は標準規格として示される山部分３３を
有し、その頂面とおねじ谷部分の底面とが輪郭的にほぼ
合致する状態で対面する。プラグ１０とジャック２０の
結合は、結合用ナット３０の内面めねじ３２とジャック
側外部導体２１の外面おねじ２８との螺合係合によりな
される。ねじ作用はひっかかり高さＨ１によって生じ、
ナット３０を回転することで両外部導体１１、２１の端
面１６、２６が当接する位置までねじ込まれてスクリュ
−ロックされる。また、ねじ込みにより結合用ナット３
０がジャック側外部導体２１上を水平方向に推移し、中
心導体１２のピン部分１３が中心導体２２の受入孔２３
の中心に嵌合する。かくして、プラグ２０とジャック３
０は機械的電気的結合が完成される。ここで、中心導体
１２、２２間にできるギャップは理想的にはゼロが好ま
しいが、クリアランスとして機械的に許容できる範囲で
設定され零より僅かに長い寸法とされ、プラグ１０とジ
ャック２０の締め付け時に外部導体が当接端面１６、２
６で確実に当接接合することを保証している。The outer conductor 21 of the jack 20, which is a feature of the present invention, has a screw 28 formed on the outer peripheral surface thereof, and the cross-sectional shape thereof is, as shown in FIG. Are formed, and the troughs 29 are shallow and flattened. On the other hand, the coupling nut 3
The 0 female screw 32 has a crest portion 33 indicated as a standard, and the top surface and the bottom surface of the male thread valley portion face each other in a state in which the contour substantially matches. The connection between the plug 10 and the jack 20 is made by screwing engagement between the internal thread 32 of the coupling nut 30 and the external thread 28 of the jack-side external conductor 21. The screw action is caused by the hook height H1,
By rotating the nut 30, the end surfaces 16, 26 of the outer conductors 11, 21 are screwed up to a position where they come into contact with each other and screw-locked. In addition, the connecting nut 3 is screwed in.
0 moves horizontally on the jack-side external conductor 21, and the pin portion 13 of the center conductor 12 is inserted into the receiving hole 23 of the center conductor 22.
To the center of Thus, plug 20 and jack 3
0 indicates that the mechanical and electrical coupling is completed. Here, the gap formed between the center conductors 12 and 22 is ideally preferably zero, but is set as a clearance within a mechanically acceptable range and is slightly longer than zero. When the plug 10 and the jack 20 are tightened, When the external conductor is in contact with the end face 16, 2
6 assures reliable contact.

【００１０】結合用ナット３０のめねじ３２はＪＩＳ−
Ｂ０２０８ユニファイ細目ねじを適用して形成されてお
り、実施例はねじの呼び名が＃６−４０ＵＮＦ−２Ｂで
あり、一般市販の汎用品で本発明の実施のために修正加
工等の必要がない。このねじの許容限界寸法および公差
はＪＩＳ−Ｂ０２１２に記載されている。本発明の特徴
はジャック側外部導体２１の外周面に形成された外面お
ねじ２８にあり、結合用ナット３０のめねじ３２の規格
に対応した＃６−４０ＵＮＦ−２Ａの許容限界寸法およ
び公差を参考にして形成されるが、規格では特に規定さ
れない谷部分の形状に着目して切削加工が施される。こ
こで外部導体２１の設計基準によれば、内径は２．４５
＋０．０２−０ｍｍに制限された中空部が形成される。
本発明はこのような中空状外部導体２１の外周面におね
じ２８を形成しなければならず、谷部分２９が自動旋盤
装置の切削加工で浅くて平坦に処理される。すなわち、
ねじ溝はＪＩＳ規格であるが、おねじ２８の谷の径は参
考値としての最大値でＭａｘ２．７０５ｍｍであり、最
小値Ｍｉｎは規定されていない。このＭａｘ値はおねじ
の谷底切り取り位置をとがり山の高Ｈの１／６とする場
合の最大許容寸法であり、これより計算上最も薄くなる
肉厚を求めるには前述のＭａｘ２．７０５ｍｍから設計
基準の内径寸法２．４５ｍｍを差し引いた半分の値（半
径）として０．１２７５ｍｍとなる。ここで、とがり山
の高さＨは公式のＨ＝Ｐｘ０．８６６より０．５５ｍｍ
となる。また、ピッチＰはねじ山数が２５．４ｍｍにつ
き４０である。したがって、本発明では前述のとがり高
さＨの１／６の位置までの範囲で切削しておねじの谷部
分とすることになり、Ｈ／６以上で選定することで所望
する０．０９ｍｍ以上の肉厚とする。谷部分の切り取り
を浅くすることで肉厚は厚くなり、めねじ基準としての
とがり山の高さＨの１／４＝０．１４ｍｍ程度までの肉
厚が選定できる。すなわち、本発明の特徴とする外部導
体２１の外面おねじ２８の谷部分２９は、規格に適合す
る結合用ナット３０の内面めねじ３２とその輪郭に合う
ように浅く切削加工して所望する台形または半円形状で
平坦化され、おねじの最も薄くなる谷部分の肉厚が厚く
確保される。ねじの締め付けは雌雄ねじが正しく組み合
っていることが条件であるので、谷部分２９が平坦化さ
れたおねじ２８は結合用ナット３０の内面めねじ３２の
輪郭に合った状態に加工処理されて噛み合うのが最適状
態となる。このようにして、本発明の同軸コネクタはプ
ラグ１０に回転自在に装着された結合用ナット３０内周
面のめねじ３２とジャック２０の外部導体２１外周面の
おねじ２８とが螺合して電気的機械的に有効かつ確実に
結合される。The female thread 32 of the coupling nut 30 is JIS-
It is formed by applying a B0208 unified fine screw. In the embodiment, the screw name is # 6-40UNF-2B, which is a general-purpose commercially available product and does not require any modification or the like for implementing the present invention. The allowable dimensions and tolerances of this screw are described in JIS-B0212. The feature of the present invention resides in the external male screw 28 formed on the outer peripheral surface of the jack-side external conductor 21. The allowable limit dimension and tolerance of # 6-40 UNF-2A corresponding to the standard of the female screw 32 of the coupling nut 30 are set. Although formed for reference, the cutting process is performed by focusing on the shape of the valley portion, which is not particularly specified in the standard. Here, according to the design standard of the outer conductor 21, the inner diameter is 2.45.
A hollow portion limited to + 0.02-0 mm is formed.
In the present invention, a screw 28 must be formed on the outer peripheral surface of such a hollow outer conductor 21, and the valley portion 29 is processed to be shallow and flat by cutting with an automatic lathe device. That is,
The thread groove is JIS standard, but the diameter of the root of the male screw 28 is Max 2.705 mm as a maximum value as a reference value, and the minimum value Min is not specified. This Max value is the maximum allowable dimension when the root cutout position of the male screw is set to 1/6 of the height H of the sharpened peak, and from this, the minimum thickness is calculated based on the above-mentioned Max 2.705 mm. Is 0.1275 mm as a half value (radius) obtained by subtracting the inner diameter dimension of 2.45 mm from. Here, the height H of the peak is 0.55 mm from the official H = P × 0.866.
Becomes Further, the pitch P is 40 per 25.4 mm of thread number. Therefore, according to the present invention, the thread is cut in the range up to the position of 1/6 of the point height H described above to form a thread valley, and 0.06 mm or more desired by selecting at H / 6 or more Thickness. By making the cut of the valley portion shallow, the wall thickness becomes thick, and a wall thickness up to about １ ／ = 0.14 mm of the height H of the pointed ridge as a standard for the internal thread can be selected. That is, the trough portion 29 of the external thread 28 of the external conductor 21 which is a feature of the present invention is formed by cutting the surface of the external thread 28 of the coupling nut 30 conforming to the standard with the internal thread 32 of the coupling shallowly to obtain a desired trapezoid. Alternatively, it is flattened in a semicircular shape, and the thickness of the thinnest valley portion of the male screw is ensured to be large. Since the screw is tightened under the condition that the male and female screws are correctly assembled, the male screw 28 having the flattened valley portion 29 is processed so as to match the contour of the internal thread 32 of the coupling nut 30. The meshing is optimal. Thus, in the coaxial connector of the present invention, the female screw 32 on the inner peripheral surface of the coupling nut 30 rotatably mounted on the plug 10 and the external thread 21 of the outer conductor 21 of the jack 20 are screwed together. Electromechanically effective and secure coupling.

【００１１】次に、プラグとジャックの結合時に、ねじ
の締め付けにおける機械的強度について実験例を詳述す
る。実施例の超小形同軸コネクタは外部導体と中心導体
の間に高誘電物質の絶縁材を介在させているが、外径が
小さくなればなるほど外部導体の肉厚は薄くなる。因み
には、外部導体はパイプ状で中空であり、その内径は絶
縁材を介在して中心導体が配置されるように厳しく規制
され、上述のように２．４５＋０．０２−０ｍｍとされ
る。このような外部導体の外周面に通常の三角ねじを形
成した場合、図３に示すようにおねじの谷部分の溝深さ
で最も薄い部分が生じ、ねじ締め付けの際の破損または
破壊するおそれがあった。本発明はこのような締め付け
トルクの制約を緩和するものであって、おねじの谷部分
の肉厚化に着目しその溝の深さ形状を浅くした台形状で
可能な限り谷部分をめねじの山部分に一致させるよう平
坦化するものである。実験的には所定の噛み合わせでね
じの締め付けが自在に可能な範囲での最も肉薄となる谷
部分の厚みは、通常の三角ねじでは０．０２５ｍｍにな
るのに対し、本発明の実施例の場合は０．０９ｍｍと３
倍以上の肉厚化が実現できた。これら谷部分の肉厚の違
いは、ねじ締め付け時の破壊トルクの違いとなり、本発
明の実施例の破壊トルクは約４９Ｎ・ｃｍ（５ｋｇｆ・
ｃｍ）で従来の約２．５倍に高めることが確認された。
本発明でおねじの谷部分を浅く切削加工して平坦化する
ことは、機械的に最も弱い部分の肉厚を増大させ、それ
によって締め付け時の破損や破壊が防止できるとともに
二つのコネクタ部材の組立作業の安定化が実現できる。Next, an experimental example will be described in detail for the mechanical strength in tightening the screw when the plug and the jack are connected. In the microminiature coaxial connector of the embodiment, an insulating material of a high dielectric substance is interposed between the outer conductor and the center conductor. However, the smaller the outer diameter is, the thinner the outer conductor is. Incidentally, the outer conductor is hollow in the shape of a pipe, and its inner diameter is strictly regulated so that the center conductor is disposed with an insulating material interposed therebetween, and is set to 2.45 + 0.02-0 mm as described above. When a normal triangular screw is formed on the outer peripheral surface of such an outer conductor, as shown in FIG. 3, a thinnest portion occurs at the groove depth of the screw root, which may cause breakage or breakage when tightening the screw. was there. The present invention is intended to alleviate such a restriction of the tightening torque, and pays attention to the increase in the thickness of the valley portion of the male screw, and trapezoidally reduces the depth of the groove to a female thread as much as possible with a trapezoidal shape. Is flattened so as to coincide with the peak portion of. Experimentally, the thickness of the thinnest valley portion within the range in which the screw can be freely tightened at a predetermined engagement is 0.025 mm with a normal triangular screw, whereas the thickness of the embodiment of the present invention is 0.09mm and 3 in case
More than double the thickness was achieved. The difference in the thickness of these valleys results in a difference in the breaking torque when tightening the screw, and the breaking torque of the embodiment of the present invention is about 49 N · cm (5 kgf ·
cm), it was confirmed to be increased to about 2.5 times the conventional value.
In the present invention, the flattening of the valley portion of the male screw by flattening it increases the thickness of the mechanically weakest portion, thereby preventing breakage and destruction at the time of tightening, and reducing the thickness of the two connector members. Stabilization of the assembly work can be realized.

【００１２】[0012]

【発明の効果】上述する実施例から明らかなように、ジ
ャック側外部導体の外周面に形成するおねじの谷部分を
浅くして平坦化することは、締め付けの際の回転トルク
でジャックが破損または破壊することが防止でき、プラ
グとジャックの結合時の組立作業を容易かつ安定化して
実施できると共に電気的特性の確保に有効である。ま
た、ねじの切削加工は自動旋盤により実施されるが、通
常の谷部分の深さ迄切削しないので処理時間の短縮化が
図られ、生産性の向上に役立つ。特に、小形化同軸コネ
クタに対しての適応効果は甚大であり、ねじ破壊トルク
を２．５倍以上高めて不具合の発生頻度を激減し作業の
安定化を図るなどの工業的価値が大である。さらには、
同軸コネクタの機械的強度のみならず電気的特性の向上
も期待されるなど実用的効果は大である。As is apparent from the above-described embodiment, the flattening of the valleys of the external threads formed on the outer peripheral surface of the outer conductor on the jack side by flattening the jacks can be caused by the rotational torque at the time of tightening. Alternatively, breakage can be prevented, and the assembling work at the time of connecting the plug and the jack can be performed easily and stably, and it is effective for securing the electrical characteristics. In addition, although the cutting of the screw is performed by an automatic lathe, since the cutting is not performed to the depth of the normal valley, the processing time is shortened, and the productivity is improved. In particular, the adaptation effect to the miniaturized coaxial connector is enormous, and its industrial value is great, such as increasing the screw breaking torque by 2.5 times or more, drastically reducing the frequency of occurrence of defects, and stabilizing work. . Moreover,
The practical effect is great, for example, the improvement of the electrical properties as well as the mechanical strength of the coaxial connector is expected.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の実施例である同軸コネクタの分離した
状態を示す部分拡大断面図、FIG. 1 is a partially enlarged sectional view showing a separated state of a coaxial connector according to an embodiment of the present invention;

【図２】図１の結合状態におけるおねじとめねじの拡大
断面を示す模式図、FIG. 2 is a schematic view showing an enlarged cross section of a male screw and a female screw in a connected state of FIG. 1;

【図３】従来の三角ねじでのおねじとめねじの結合状態
の拡大断面を示す模式図。FIG. 3 is a schematic diagram showing an enlarged cross section of a conventional triangular screw in which a male screw and a female screw are joined.

【符号の説明】[Explanation of symbols]

１０、２０ コネクタ部材（プラグ、ジャック） １１、２１ 外部導体（第１、第２外部導体） １２、２２ 中心導体（第１、第２中心導体） １３、２３ 中心導体の接続手段（ピン部分、ピン受入
孔） １４、２４ 絶縁材 １５、２５ 中心導体の先端面 １６、２６ 外部導体の当接端面 １７ ガスケット ２８ おねじ ２９ おねじの谷部分 ３０ 結合用ナット ３１ リティナリング ３２ めねじ ３３ めねじの山部分10, 20 Connector member (plug, jack) 11, 21 Outer conductor (first and second outer conductors) 12, 22 Center conductor (first and second center conductors) 13, 23 Center conductor connection means (pin portion, Pin receiving hole) 14, 24 Insulating material 15, 25 Front end face of center conductor 16, 26 Contact end face of outer conductor 17 Gasket 28 Male screw 29 Male screw root 30 Coupling nut 31 Retainer ring 32 Female screw 33 Female screw Mountain part of

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】第１外部導体と第１中心導体を有する第１
コネクタ部材と、第２外部導体と第２中心導体を有する
第２コネクタ部材と、前記第１コネクタ部材に回動自在
に装着した結合部材とを具備し、前記第２外部導体は外
周面に谷部分を略平坦に形成したおねじを有し、前記結
合部材はナットの内周面に形成しためねじを有し、前記
おねじと前記めねじの係合により前記第１コネクタ部材
と前記第２コネクタ部材を電気的機械的に結合する同軸
コネクタ。A first outer conductor and a first center conductor having a first center conductor;
A connector member, a second connector member having a second outer conductor and a second center conductor, and a coupling member rotatably mounted on the first connector member, wherein the second outer conductor has a valley on its outer peripheral surface. The coupling member has a screw formed on an inner peripheral surface of a nut, and the first connector member and the first connector are engaged by engagement of the male screw and the female screw. A coaxial connector for electrically and mechanically connecting two connector members. 【請求項２】前記第１コネクタ部材がプラグであり、前
記第２コネクタ部材がジャックであり、前記結合部材は
前記プラグ側外部導体に係留された結合用ナットであ
り、前記ジャック側外部導体に形成される谷部分を浅く
した外面おねじを前記結合用ナットに形成される山部分
を平坦にした内面めねじと螺合させ、それにより前記ジ
ャック側外部導体の機械強度を高めて前記プラグおよび
前記ジャックを締付け固着することを特徴とする請求項
１に記載した同軸コネクタ。2. The first connector member is a plug, the second connector member is a jack, the coupling member is a coupling nut anchored to the plug-side external conductor, and the jack-side external conductor is connected to the jack-side external conductor. An external male screw with a shallow valley formed is screwed with an internal female screw with a flat ridge formed on the coupling nut, thereby increasing the mechanical strength of the jack-side external conductor to increase the mechanical strength of the plug and the plug. The coaxial connector according to claim 1, wherein the jack is fixedly fastened. 【請求項３】前記外面おねじおよび内面めねじがＪＩＳ
規定のユニファイ細目ねじに適合する基準山形であっ
て、前記外面おねじの谷部分を前記内面ねじの山部分に
合致する輪郭に切削加工して前記外面おねじの谷部分を
浅く平坦化したことを特徴とする請求項２に記載した同
軸コネクタ。3. The method according to claim 1, wherein the external male screw and the internal female screw are JIS.
A reference mountain shape that conforms to the specified unified fine thread, wherein the valley portion of the external male screw is cut into a contour that matches the ridge portion of the internal screw to flatten the valley portion of the external male screw shallowly. The coaxial connector according to claim 2, wherein: 【請求項４】前記内面めねじと前記外面おねじはとがり
山の高さＨの６０度三角ねじでそれぞれ山部分の形状を
異にし、前記内面めねじの山部分の頂面が前記外面おね
じの谷部分の底面と所定位置で対面させたことを特徴と
する請求項２に記載した同軸コネクタ。4. The inner female screw and the outer male screw are formed by a 60-degree triangular screw having a height H of a pointed ridge, and the shapes of the ridge portions are different from each other, and the top surface of the ridge portion of the inner female screw is formed on the outer surface. 3. The coaxial connector according to claim 2, wherein the coaxial connector faces a bottom surface of the thread root at a predetermined position. 【請求項５】前記所定位置はとがり山の高さＨの１／６
以上であり、前記外面おねじと前記内面めねじとが係合
するひっかかり高さＨ1 は前記とがり山の高さＨの略５
／８に前記外面おねじの谷部分の切削を浅くして平坦化
したことを特徴とする請求項４に記載した同軸コネク
タ。5. The predetermined position is one-sixth of a height H of a sharp mountain.
The engaging height H1 at which the outer surface external thread and the inner surface internal thread engage is approximately 5 times the height H of the pointed peak.
The coaxial connector according to claim 4, wherein the valleys of the external surface external threads are made shallow and flattened at / 8. 【請求項６】前記第１および第２のコネクタ部材はそれ
ぞれに前記外部導体と中心導体間に絶縁材を介して同心
状に配置して構成され、前記第１および第２外部導体は
先端部が平端面に形成され、前記第１および第２中心導
体の先端部にはピン部分およびピン受入部分の電気的接
触部が形成され、前記ナットの回転によりめねじをおね
じに螺合させ、前記平端面間を当接させると共に前記ピ
ン部分をピン受入部に嵌入させて前記両コネクタ部材を
電気的に接続しつつ機械的に締め付け結合することを特
徴とする請求項１に記載した同軸コネクタ。6. The first and second connector members are respectively arranged concentrically via an insulating material between the outer conductor and a center conductor, and the first and second outer conductors are provided at a tip end. Are formed on the flat end face, and electrical contact portions of a pin portion and a pin receiving portion are formed at the distal end portions of the first and second center conductors. The female screw is screwed into the male screw by rotation of the nut, The coaxial connector according to claim 1, wherein the flat end surfaces are brought into contact with each other, and the pin portion is fitted into a pin receiving portion to mechanically tighten and connect the two connector members while electrically connecting the two connector members. .