JP2005228666A

JP2005228666A - Round shielded connector

Info

Publication number: JP2005228666A
Application number: JP2004037830A
Authority: JP
Inventors: Jiro Fukui; 二郎福井
Original assignee: Sumitomo Wiring Systems Ltd; AutoNetworks Technologies Ltd; Sumitomo Electric Industries Ltd
Current assignee: Sumitomo Wiring Systems Ltd; AutoNetworks Technologies Ltd; Sumitomo Electric Industries Ltd
Priority date: 2004-02-16
Filing date: 2004-02-16
Publication date: 2005-08-25

Abstract

<P>PROBLEM TO BE SOLVED: To provide a round shielded connector in which the contact pressure will not decrease, even if deviations occur between the center axes of a male outer conductor terminal and a female outer conductor terminal. <P>SOLUTION: In a round shielded connector, the outer conductor terminal 8 is fitted inside the outer conductor terminal 9. The inner peripheral surface of the outer conductor terminal 9 of one round shape shielded connector 3 is provided with two contact pieces 9c, 9c facing each other for elastically contacting the outer peripheral surface of the outer conductor terminal 8 of the other round shape shielded connector 2. The contact pieces 9c, 9c are provided with planar contacts 9d, 9d, formed separately to protrude in an inner diametric direction. Planar faces of two planar contacts are faced in parallel with each other, and thus the distance between their contact points does will no longer vary according to the deviation of the contact points in the planar contacts. In other words, because the amount of elastic displacement of the two contact segments will not vary, decreasing of the contact pressure due to the deviation is eliminated. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、同軸ケーブルなどのシールド導体を有するシールドケーブルに接続される丸型シールドコネクタに関する。 The present invention relates to a round shield connector connected to a shield cable having a shield conductor such as a coaxial cable.

同軸ケーブルの一般的な構造としては、電気信号等の伝送路として金属製の複数の素線を撚り束ねた信号導体と同じく複数の素線を編んだ編組線よりなるシールド導体との間に絶縁体が介在され、その外周を同じく絶縁性のシースで覆った同軸の構造になっており、シールド導体が信号導体の外周を一定の間隔を置いて隙間なく覆うことで高周波数の電気信号の伝達に適した構造になっている。 As a general structure of a coaxial cable, insulation is provided between a signal conductor in which a plurality of metal wires are twisted and bundled as a transmission path for electric signals and the like, and a shield conductor made of a braided wire in which a plurality of wires are knitted. It has a coaxial structure in which the body is interposed and the outer periphery is also covered with an insulating sheath, and the shield conductor covers the outer periphery of the signal conductor at a constant interval without any gaps so that high-frequency electrical signals can be transmitted. The structure is suitable for.

このような高周波信号を伝送する同軸ケーブルの両端に接続される端子を内蔵した同軸コネクタには、ケーブルの信号導体と接続される内導体端子と、編組線などのシールド導体と接続されると共に内導体端子の外周を覆って電磁的にシールドする外導体端子と、これら内導体端子と外導体端子の間に介在して設けられる所定の誘電率を有する誘電体とが備えられており、接続されるケーブル端末の信号線の絶縁体とシースが剥ぎ取られて露出した信号導体とシールド導体にそれぞれ個別に電気的に接続される。 A coaxial connector having terminals connected to both ends of a coaxial cable for transmitting such a high-frequency signal is connected to an inner conductor terminal connected to a signal conductor of the cable and a shield conductor such as a braided wire and an inner terminal. An outer conductor terminal that covers the outer periphery of the conductor terminal and electromagnetically shields and a dielectric having a predetermined dielectric constant provided between the inner conductor terminal and the outer conductor terminal are provided and connected. The signal line insulator and sheath of the cable terminal are peeled off and electrically connected to the exposed signal conductor and shield conductor, respectively.

図３に示される同軸コネクタ１０は、丸型シールドコネクタと呼ばれるもので、左側のメスコネクタ１１と右側のオスコネクタ１２の嵌合接続により左の同軸ケーブルＷ１と右の同軸ケーブルＷ２が接続されることになる。通常、オスコネクタ１２のオス外導体端子１４の内径は、メスコネクタ１１のメス外導体端子１３の外径よりも太径に形成されて、接続の際には図示されるように、オス外導体端子１４の内側にメス外導体端子１３が嵌まり込むようになっている。 The coaxial connector 10 shown in FIG. 3 is called a round shield connector, and the left coaxial cable W1 and the right coaxial cable W2 are connected by fitting connection of the left female connector 11 and the right male connector 12. It will be. Usually, the inner diameter of the male outer conductor terminal 14 of the male connector 12 is formed to be larger than the outer diameter of the female outer conductor terminal 13 of the female connector 11, and the male outer conductor is connected as shown in FIG. The female outer conductor terminal 13 is fitted inside the terminal 14.

このオス外導体端子１４の内周面には、その内側に嵌まり込むメス外導体端子１３の外周面に弾性接触させるための２つの接触片１４ａ，１４ａが互いに向かい合うように設けられており、それぞれの接触片１４ａには、エンボス加工により内径方向に向かって突出された半球接触部１４ｂが形成されている。図４（ａ）は図３のＢ−Ｂ断面におけるオス外導体端子１４とメス外導体端子１３の接触構造を示した図である。図中のｃ，ｃは半球接触部１４ｂ，１４ｂのメス外導体端子１３外周面への接触点である。 On the inner peripheral surface of the male outer conductor terminal 14, two contact pieces 14a, 14a for elastic contact with the outer peripheral surface of the female outer conductor terminal 13 fitted inside the male outer conductor terminal 14 are provided so as to face each other. Each contact piece 14a is formed with a hemispherical contact portion 14b protruding in the inner diameter direction by embossing. FIG. 4A is a view showing a contact structure between the male outer conductor terminal 14 and the female outer conductor terminal 13 in the BB cross section of FIG. In the drawing, c and c are contact points of the hemispherical contact portions 14b and 14b with the outer peripheral surface of the female outer conductor terminal 13.

特開２０００−１７３７２５号JP 2000-173725 A

しかしながら、外導体端子を含む各部材の製造ばらつきにより、オス外導体端子１４とメス外導体端子１３の中心軸にずれが生じる場合があり、特に、図４（ｂ）に示すように、左右の半球接触部１４ｂ，１４ｂの間でメス外導体端子１３の中心軸がオス外導体端子１４の中心軸に対して下方向にずれると、半球接触部１４ｂ，１４ｂによるメス外導体端子１３の挟みこみ位置がずれることから、半球接触部１４ｂ，１４ｂとメス外導体端子１３外周面への接触点は図示されるようにｄ，ｄとなる。 However, due to manufacturing variations of each member including the outer conductor terminal, the center axis of the male outer conductor terminal 14 and the female outer conductor terminal 13 may be displaced. In particular, as shown in FIG. When the central axis of the female outer conductor terminal 13 is shifted downward with respect to the central axis of the male outer conductor terminal 14 between the hemispherical contact portions 14b and 14b, the female outer conductor terminal 13 is caught by the hemispherical contact portions 14b and 14b. Since the positions are shifted, the contact points of the hemispherical contact portions 14b and 14b and the outer peripheral surface of the female outer conductor terminal 13 are d and d as shown.

この接触点ｄ−ｄ間の距離は、図４（ａ）の接触点ｃ−ｃ間の距離よりも小さくなるため、接触片１４ａ，１４ａの弾性変位量が少なくなって接触圧力が低下するという問題がある。この問題は各部材の寸法公差を小さくして両外導体端子の中心軸のずれをなくすことで解消するが、製造コストがアップする。 Since the distance between the contact points dd is smaller than the distance between the contact points cc in FIG. 4A, the amount of elastic displacement of the contact pieces 14a and 14a is reduced and the contact pressure is reduced. There's a problem. This problem is solved by reducing the dimensional tolerance of each member and eliminating the deviation of the center axis of both outer conductor terminals, but the manufacturing cost increases.

そこで本発明が解決する課題は、従来の半球接触部の形状を変更することで、オス外導体端子とメス外導体端子の中心軸にずれが生じても、接触圧力が低下しない丸型シールドコネクタを提供することである。 Therefore, the problem to be solved by the present invention is to change the shape of the conventional hemispherical contact portion so that the contact pressure does not decrease even if the center axis of the male outer conductor terminal and the female outer conductor terminal is displaced. Is to provide.

上記課題を解決するため本発明に係る丸型シールドコネクタは、信号導体とシールド導体とを有するシールドケーブルの前記信号導体に接続される内導体端子を、誘電体を介在させて略円筒状の外導体端子に収容すると共に、該外導体端子に前記シールド導体を接続してなる丸型シールドコネクタにおいて、一方の丸型シールドコネクタの外導体端子の内周面には、その内側に嵌まり込む他方の丸型シールドコネクタの外導体端子の外周面に弾性接触させるための２つの接触片が互いに向かい合って設けられると共に、それぞれの接触片には内径方向に向かった平面接触部が突出して形成されていることを要旨とするものである。この場合、前記２つの平面接触部の平面部は互いに平行になるように対向していると良い。 In order to solve the above-mentioned problems, a round shield connector according to the present invention provides an inner conductor terminal connected to the signal conductor of a shielded cable having a signal conductor and a shield conductor with a substantially cylindrical outer shape with a dielectric interposed. In the round shield connector which is accommodated in the conductor terminal and is connected to the shield conductor to the outer conductor terminal, the other of the inner conductors of the round shield connector is fitted inside the outer conductor terminal. Two contact pieces for elastic contact with the outer peripheral surface of the outer conductor terminal of the round shield connector are provided so as to face each other, and each contact piece is formed with a flat contact portion protruding in the inner diameter direction. The gist of this is. In this case, it is preferable that the planar portions of the two planar contact portions face each other so as to be parallel to each other.

上記構成を有する丸型シールドコネクタの発明によれば、一方の丸型シールドコネクタの外導体端子の内周面には、その内側に嵌まり込む他方の丸型シールドコネクタの外導体端子の外周面に弾性接触させるための２つの接触片が互いに向かい合って設けられると共に、それぞれの接触片には内径方向に向かった平面接触部が突出して形成されているので、向かい合った接触片の内側の外導体端子の中心軸が上下にずれることによって平面接触部における接触点がずれてもその接触点間の距離に変化が少なく、結果接触圧力の低下が防止される。この場合、前記２つの平面接触部の平面部は互いに平行になるように対向している構成にすれば、平面接触部における接触点のずれに対するその接触点間の距離の変化は生じなくなる、つまり２つの接触片の弾性変位量に変化がないため、ずれによる接触圧力の低下が無くなる。 According to the invention of the round shield connector having the above configuration, the outer peripheral surface of the outer conductor terminal of the other round shield connector fitted inside the outer peripheral terminal of the outer conductor terminal of one round shield connector. Two contact pieces for elastic contact with each other are provided so as to face each other, and each contact piece is formed with a flat contact portion protruding in the inner diameter direction, so that the outer conductor inside the facing contact piece Even if the contact point in the plane contact portion is displaced due to the center axis of the terminal being displaced up and down, the distance between the contact points is little changed, thereby preventing the contact pressure from being lowered. In this case, if the plane portions of the two plane contact portions are opposed to each other so as to be parallel to each other, no change in the distance between the contact points due to the displacement of the contact points in the plane contact portion occurs. Since there is no change in the amount of elastic displacement between the two contact pieces, there is no decrease in contact pressure due to displacement.

以下に、本発明に係る丸型シールドコネクタの実施の形態について図面を参照して説明する。尚、本発明に係る接続構造は、信号導体が一本の同軸ケーブルや多数本有するいわゆる多芯シールドケーブルに適用されるもので、本実施形態では特に同軸ケーブルに適用した場合について説明する。図１は、本発明の実施形態に係る丸型シールドコネクタ１の嵌合接続前および嵌合接続後の概略構成を示した図である。 Embodiments of a round shield connector according to the present invention will be described below with reference to the drawings. The connection structure according to the present invention is applied to a single coaxial cable or a so-called multi-core shielded cable having a large number of signal conductors. In this embodiment, a case where the signal structure is applied to a coaxial cable will be described. FIG. 1 is a diagram showing a schematic configuration of a round shield connector 1 according to an embodiment of the present invention before and after fitting connection.

図１に示されるように、左右の同軸ケーブルＷ１，Ｗ２の端末部分に接続されるメスコネクタ２とオスコネクタ３は、それぞれ内導体端子４，５、誘電体６，７および外導体端子８，９とで構成される。それぞれの内導体端子４，５は、同軸ケーブルＷ１，Ｗ２の信号線Ｗａの信号導体Ｗｂに接続して高周波信号を伝達するもので、内導体端子４，５はいわゆるメス型，オス型と呼ばれる端子形状を有している。 As shown in FIG. 1, the female connector 2 and the male connector 3 connected to the terminal portions of the left and right coaxial cables W1, W2 are the inner conductor terminals 4, 5, dielectrics 6, 7, and outer conductor terminals 8, respectively. 9. Each of the inner conductor terminals 4 and 5 is connected to the signal conductor Wb of the signal line Wa of the coaxial cables W1 and W2 to transmit a high frequency signal. The inner conductor terminals 4 and 5 are called so-called female type and male type. It has a terminal shape.

これら内導体端子４，５を収容する誘電体６，７は、それぞれ内導体端子４，５と外導体端子８，９の導体端子間を絶縁状態にするためのもので、所定の誘電率を有する樹脂製の絶縁部材により成形されており、後方から内導体端子４，５は挿入されて固定される。 The dielectrics 6 and 7 for accommodating the inner conductor terminals 4 and 5 are for insulating the conductor terminals of the inner conductor terminals 4 and 5 and the outer conductor terminals 8 and 9, respectively, and have a predetermined dielectric constant. The inner conductor terminals 4 and 5 are inserted and fixed from the rear.

外導体端子８，９は、同軸ケーブルＷ１，Ｗ２のシールド導体Ｗｄに接続して、それぞれの内導体端子４，５の周囲を覆って電磁的にシールドするものである。この外導体端子８，９は、導電性板材の折り曲げ加工やプレス加工により前後に開口した円筒形状の本体部８ａ，９ａを備えており、その本体部８ａ，９ａ内には前述の誘電体６，７が収容可能なっている。また、それぞれの本体部８ａ，９ａは、後方に延設された圧着部８ｂ，９ｂを備えており、露出されたシールド導体ＷｄおよびシースＷｅにカシメ加工されて、両外導体端子８，９はシールド導体Ｗｄと電気的に接続される。 The outer conductor terminals 8 and 9 are connected to the shield conductors Wd of the coaxial cables W1 and W2 and electromagnetically shield the outer conductor terminals 4 and 5 so as to cover the periphery of the respective inner conductor terminals 4 and 5. The outer conductor terminals 8 and 9 are provided with cylindrical main body portions 8a and 9a which are opened back and forth by bending or pressing a conductive plate material, and the dielectric body 6 is included in the main body portions 8a and 9a. , 7 can be accommodated. Further, each of the main body portions 8a and 9a includes crimping portions 8b and 9b extending rearward, and is caulked to the exposed shield conductor Wd and sheath We, so that the outer conductor terminals 8 and 9 are It is electrically connected to the shield conductor Wd.

オスコネクタ３のオス外導体端子９の本体部９ａの内径は、メスコネクタ２のメス外導体端子８の本体部８ａの外径よりも太径に形成されて、接続の際には図示されるように、オス外導体端子９の本体部９ａの内側にメス外導体端子８の本体部８ａが嵌まり込むようになっている。 The inner diameter of the main body portion 9a of the male outer conductor terminal 9 of the male connector 3 is formed to be larger than the outer diameter of the main body portion 8a of the female outer conductor terminal 8 of the female connector 2, and is illustrated in the case of connection. Thus, the main body 8 a of the female outer conductor terminal 8 is fitted inside the main body 9 a of the male outer conductor terminal 9.

図２（ａ）は図１のＡ−Ａ断面におけるオス外導体端子９とメス外導体端子８の接触構造を示した図で、図示されるようにオス外導体端子９の内周面には、その内側に嵌まり込むメス外導体端子８の外周面に弾性接触させるための２つの接触片９ｃ，９ｃが打ち抜き加工により互いに向かい合って設けられている。それぞれの接触片９ｃ，９ｃには、エンボス加工により内径方向に向かって台形状に突出された平面接触部９ｄ，９ｄが形成されている。左右の平面接触部９ｄ，９ｄの平面部９ｆ，９ｆは互いに平行になるように面している。 FIG. 2A is a diagram showing a contact structure between the male outer conductor terminal 9 and the female outer conductor terminal 8 in the AA cross section of FIG. 1, and the inner peripheral surface of the male outer conductor terminal 9 as shown in FIG. The two contact pieces 9c, 9c for elastically contacting the outer peripheral surface of the female outer conductor terminal 8 fitted inside are provided facing each other by punching. Each contact piece 9c, 9c is formed with flat contact portions 9d, 9d that protrude in a trapezoidal shape toward the inner diameter direction by embossing. The plane portions 9f and 9f of the left and right plane contact portions 9d and 9d face each other in parallel.

図２（ａ）に示されるオス外導体端子９の中心軸とメス外導体端子８の中心軸はこの場合一致しており、図中のａ，ａはこのときの平面接触部９ｄ，９ｄの平面部９ｆ，９ｆの中央位置とメス外導体端子８外周面との接触点であり、このとき接触点ａ−ａ間の距離はちょうどメス外導体端子８の直径長さと同じである。 The central axis of the male outer conductor terminal 9 and the central axis of the female outer conductor terminal 8 shown in FIG. 2 (a) coincide with each other in this case, and a and a in the figure are the plane contact portions 9d and 9d at this time. It is a contact point between the center position of the flat portions 9f and 9f and the outer peripheral surface of the female outer conductor terminal 8. At this time, the distance between the contact points aa is exactly the same as the diameter length of the female outer conductor terminal 8.

図２（ｂ）は丸型シールドコネクタ１を構成する各部材の製造ばらつきにより、オス外導体端子９とメス外導体端子８の中心軸にずれが生じた状態を示していおり、左右の平面接触部９ｄ，９ｄの間でメス外導体端子８の中心軸がオス外導体端子９の中心軸に対してやや下方向にずれた状態が示されている。 FIG. 2B shows a state in which the center axis of the male outer conductor terminal 9 and the female outer conductor terminal 8 is shifted due to manufacturing variations of the members constituting the round shield connector 1. A state in which the central axis of the female outer conductor terminal 8 is slightly shifted downward from the central axis of the male outer conductor terminal 9 is shown between the portions 9d and 9d.

図中のｂ，ｂはこのときの平面接触部９ｄ，９ｄの平面部９ｆ，９ｆとメス外導体端子８外周面との接触点であるが、図２（ａ）の場合の接触点ａ，ａ位置よりやや下方にずれるが、向かい合う左右の平面接触部９ｄ，９ｄの平面部９ｆ，９ｆが互いに平行になるように面しているため、この状態のときも接触点ｂ−ｂ間の距離は、図２（ａ）の接触点ａ−ａ間の距離と同じである。したがって、図２（ａ）の場合も図２（ｂ）の場合も、接触片９ｃ，９ｃの弾性変位量に違いはなく、メス外導体端子８が下方へずれても接触圧力が低下することがない。 B and b in the figure are contact points between the flat portions 9f and 9f of the flat contact portions 9d and 9d at this time and the outer peripheral surface of the female outer conductor terminal 8, but the contact points a and b in the case of FIG. Although the position is slightly lower than the position a, since the plane portions 9f and 9f of the left and right plane contact portions 9d and 9d facing each other face each other in parallel, the distance between the contact points bb is also in this state. Is the same as the distance between the contact points aa in FIG. Therefore, in both the case of FIG. 2A and FIG. 2B, there is no difference in the amount of elastic displacement of the contact pieces 9c, 9c, and the contact pressure decreases even if the female outer conductor terminal 8 is displaced downward. There is no.

このように、平面接触部９ｄ，９ｄの平面部９ｆ，９ｆとメス外導体端子８外周面との接触点のずれが、平面部９ｆの範囲内であれば、両接触点間の距離に変化が生じない。これにより、丸型シールドコネクタ１を構成する各部材の寸法公差を小さくして両外導体端子の中心軸のずれをなくすなどの対策を施すことなく、接触圧力の低下を防止することができる。 Thus, if the displacement of the contact point between the planar portions 9f, 9f of the planar contact portions 9d, 9d and the outer peripheral surface of the female outer conductor terminal 8 is within the range of the planar portion 9f, the distance between the contact points is changed. Does not occur. Accordingly, it is possible to prevent a decrease in contact pressure without taking measures such as reducing the dimensional tolerance of each member constituting the round shield connector 1 and eliminating the deviation of the center axis of both outer conductor terminals.

以上、本発明に係る丸型シールドコネクタの実施の形態について説明したが、本発明はこうした実施例に何ら限定されるものではなく、本発明の要旨を逸脱しない範囲において、種々なる態様で実施できることは勿論である。例えば、平面部の形状は、図示したような長方形のほか長丸形状などでもよく、両外導体端子の中心軸のずれを考慮した広さの平面部を有すればよいものである。尚、上記実施の形態ではオス外導体端子の内側にメス外導体端子の嵌まり込む嵌合接続構造のものを示したが、メス外導体端子の内側にオス外導体端子が嵌まり込むタイプのものに適用可能であるのは言うまでもなく、上記実施の形態に限定されない。 The embodiment of the round shield connector according to the present invention has been described above. However, the present invention is not limited to such an embodiment, and can be implemented in various modes without departing from the gist of the present invention. Of course. For example, the shape of the plane portion may be an oblong shape in addition to the rectangular shape shown in the drawing, and it is sufficient if the plane portion has a width that takes into account the deviation of the center axis of both outer conductor terminals. In the above-described embodiment, the female outer conductor terminal is fitted and connected to the female outer conductor terminal, but the male outer conductor terminal is fitted to the inner side of the female outer conductor terminal. Needless to say, the present invention is not limited to the above embodiment.

本発明の一実施形態に係る丸型シールドコネクタの嵌合接続前および嵌合接続後の概略構成を示した図である。It is the figure which showed schematic structure before the fitting connection of the round shield connector which concerns on one Embodiment of this invention, and after a fitting connection. 図１のオス外導体端子とメス外導体端子の接触断面構造を示した図である。It is the figure which showed the contact cross-section of the male outer conductor terminal and female outer conductor terminal of FIG. 従来技術に係る丸型シールドコネクタの嵌合接続前および嵌合接続後の概略構成を示した図である。It is the figure which showed schematic structure before fitting connection of the round shield connector which concerns on a prior art, and after fitting connection. 図３のオス外導体端子とメス外導体端子の接触断面構造を示した図である。It is the figure which showed the contact cross-section of the male outer conductor terminal and female outer conductor terminal of FIG.

符号の説明Explanation of symbols

１丸型シールドコネクタ
２メスコネクタ
３オスコネクタ
４メス内導体端子
５オス内導体端子
６メス誘電体
７オス誘電体
８メス外導体端子
８ａ本体部
８ｂ圧着部
９オス外導体端子
９ａ本体部
９ｂ圧着部
９ｃ接触片
９ｄ平面接触部
９ｆ平面部
ａ，ｂ接触点
Ｗ１，Ｗ２同軸ケーブル
Ｗａ信号線
Ｗｂ信号導体
Ｗｄシールド導体
Ｗｅシース DESCRIPTION OF SYMBOLS 1 Round shield connector 2 Female connector 3 Male connector 4 Female conductor terminal 5 Male conductor terminal 6 Female dielectric body 7 Male dielectric body 8 Female outer conductor terminal 8a Body part 8b Crimp part 9 Male outer conductor terminal 9a Body part 9b Crimp Part 9c Contact piece 9d Plane contact part 9f Plane part a, b Contact point W1, W2 Coaxial cable Wa Signal line Wb Signal conductor Wd Shield conductor We Sheath

Claims

信号導体とシールド導体とを有するシールドケーブルの前記信号導体に接続される内導体端子を、誘電体を介在させて略円筒状の外導体端子に収容すると共に、該外導体端子に前記シールド導体を接続してなる丸型シールドコネクタにおいて、一方の丸型シールドコネクタの外導体端子の内周面には、その内側に嵌まり込む他方の丸型シールドコネクタの外導体端子の外周面に弾性接触させるための２つの接触片が互いに向かい合って設けられると共に、それぞれの接触片には内径方向に向かった平面接触部が突出して形成されていることを特徴する丸型シールドコネクタ。 An inner conductor terminal connected to the signal conductor of a shielded cable having a signal conductor and a shield conductor is accommodated in a substantially cylindrical outer conductor terminal with a dielectric interposed therebetween, and the shield conductor is accommodated in the outer conductor terminal. In the connected round shield connector, the inner peripheral surface of the outer conductor terminal of one of the round shield connectors is brought into elastic contact with the outer peripheral surface of the outer conductor terminal of the other round shield connector fitted inside the round shield connector. A round shield connector characterized in that two contact pieces are provided to face each other, and each contact piece is formed with a flat contact portion protruding in the inner diameter direction.

前記２つの平面接触部の平面部は互いに平行になるように対向していることを特徴とする請求項１に記載の丸型シールドコネクタ。 2. The round shield connector according to claim 1, wherein the planar portions of the two planar contact portions are opposed to each other in parallel.