JP2007059323A - Differential signal transmission cable - Google Patents

Differential signal transmission cable Download PDF

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JP2007059323A
JP2007059323A JP2005245953A JP2005245953A JP2007059323A JP 2007059323 A JP2007059323 A JP 2007059323A JP 2005245953 A JP2005245953 A JP 2005245953A JP 2005245953 A JP2005245953 A JP 2005245953A JP 2007059323 A JP2007059323 A JP 2007059323A
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differential signal
transmission cable
signal transmission
signal pair
wires
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Tatsunari Miyashita
龍成 宮下
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SWCC Showa Device Technology Co Ltd
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SWCC Showa Device Technology Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a differential signal transmission cable capable of easily bending in desired directions and easily enabling removal work of an insulating film at terminal processing and connection work of a cable and a connector. <P>SOLUTION: The differential signal transmission cable is provided with a pair of differential signal electric wires 18 in which two insulating electric wires 12 and at least one drain wire 14 are arranged in parallel on the same plane and a shield layer 16 consisting of a conductive tape is installed on the outer circumference. A plurality of these pairs of differential signal electric wires 18 are arranged respectively on the same plane in parallel, and an insulating film 20 is arranged throughout the plane part of these pairs of differential signal wires 18. The insulating film 20 is arranged on both sides or on one side of the pairs of differential signal wires 18. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、コンピュータデバイスの周辺機器、高解像度の画像の伝送や高速ＨＤＤ等の記憶媒体の伝送回路に用いられる差動信号伝送ケーブルに関する。   The present invention relates to a differential signal transmission cable used in peripheral devices of computer devices, transmission of high-resolution images, and transmission circuits of storage media such as high-speed HDDs.

従来から、高速伝送方式として差動信号伝送（ディファレンシャル）方式が注目されている。この差動信号伝送方式によるコンピュータデバイスの周辺機器、高解像度の画像伝送回路、高速ＨＤＤ等の信号記憶媒体を繋ぐのに好適な伝送回路として差動信号伝送ケーブルがある。中でも５００Ｍｂｐｓ以上の高速伝送に用いられる差動信号伝送ケーブルは伝達信号どうしの僅かな信号の伝播遅延時間差（スキュー）が問題となる。このため、差動信号伝送ケーブルは、信号線となる２本の絶縁電線どうしの伝播遅延時間差を限りなくゼロに近づける必要がある。   Conventionally, a differential signal transmission (differential) system has attracted attention as a high-speed transmission system. There is a differential signal transmission cable as a transmission circuit suitable for connecting a peripheral device of a computer device by this differential signal transmission system, a high-resolution image transmission circuit, and a signal storage medium such as a high-speed HDD. In particular, a differential signal transmission cable used for high-speed transmission of 500 Mbps or more has a problem of a slight signal propagation delay time difference (skew) between transmission signals. For this reason, in the differential signal transmission cable, it is necessary to make the difference in propagation delay time between the two insulated wires to be signal lines as close to zero as possible.

このような要求に適合した従来の差動信号伝送ケーブルの第１の例として、図５（ａ）に示すケーブルがある。すなわち、中心導体５１の外周に低密度絶縁層５２及びスキン層５３を順次設けた絶縁電線（信号線）５４を２本平行に接して並べ、これらの２本の絶縁電線５４の外周に、金属プラスチックラミネートテープを金属面を外側にして包囲して遮蔽層５５を設け、この遮蔽層５５の外側で、２本の絶縁電線５４の中央外側部の一方にドレイン線５６を縦添えし、このドレイン線５６と遮蔽層５５の外周に合成樹脂テープを巻回して押え巻きテープ層５７を設け、さらにこの外周に絶縁層５８を被覆してなる差動信号対電線からなる差動信号伝送ケーブル５９である。   As a first example of a conventional differential signal transmission cable that meets such requirements, there is a cable shown in FIG. That is, two insulated wires (signal lines) 54 in which a low-density insulating layer 52 and a skin layer 53 are sequentially provided on the outer periphery of the central conductor 51 are arranged in contact with each other in parallel. A shielding layer 55 is provided by enclosing the plastic laminate tape with the metal surface facing outward, and a drain wire 56 is vertically attached to one of the central outer portions of the two insulated wires 54 outside the shielding layer 55. A synthetic signal tape is wound around the outer periphery of the wire 56 and the shielding layer 55 to provide a press-wound tape layer 57, and further, a differential signal transmission cable 59 comprising a differential signal pair wire in which the outer periphery is covered with an insulating layer 58. is there.

さらに、従来の差動信号伝送ケーブルの第２の例として、図５（ｂ）に示すケーブルがある。すなわち、従来の第１の例と同じ構造の２本の絶縁電線５４の電気的平衡度を重視した、ビットレートの高速化に対応したハイスペック品として、２本の絶縁電線５４を平行に並べ、それらの両側にドレイン線５６を配置し、４芯フラット構造を保ちつつ金属プラスチックラミネートテープを金属面を内側にして螺旋巻き若しくは縦添えして遮蔽層５５を形成し、その外側に絶縁層５８を被覆してなる差動信号対電線からなる差動信号伝送ケーブル６０が知られている。また、差動信号対電線が複数本、平行に並べられ隣接する差動信号対電線の保護被膜どうしが互いに接着または融着して構成することも知られている（例えば、特許文献１参照）。   Further, as a second example of the conventional differential signal transmission cable, there is a cable shown in FIG. In other words, the two insulated wires 54 are arranged in parallel as a high-spec product corresponding to a higher bit rate with an emphasis on the electrical balance of the two insulated wires 54 having the same structure as the conventional first example. The drain lines 56 are disposed on both sides of the metal, and a shielding layer 55 is formed by spirally winding or vertically attaching a metal plastic laminate tape with the metal surface facing inward while maintaining a four-core flat structure, and an insulating layer 58 on the outside thereof. There is known a differential signal transmission cable 60 comprising a differential signal-to-electric wire coated with a wire. It is also known that a plurality of differential signal pair wires are arranged in parallel and the protective coatings of adjacent differential signal pair wires are bonded or fused together (see, for example, Patent Document 1). .

そして、複数本の絶縁電線を撚り合わせて高速信号伝送ケーブルを製造する際に、各絶縁電線を全て略等しい長さにした状態で撚り合わせて、絶縁電線どうしのスキューを限りなくゼロに近づけることができるように組立て加工される高速信号伝送ケーブルとして、差動信号対電線が複数本、平行に所定のピッチ間隔で平面状に並べられ、これらの差動信号対電線の長手方向に対して横断する複数の固定テープを間欠的に配置し、これらの固定テープによって差動信号対電線が一体に保持された高速信号伝送ケーブルが知られている（例えば、特許文献２参照）。   When manufacturing a high-speed signal transmission cable by twisting a plurality of insulated wires, twist each insulated wire in an almost equal length so that the skew between the insulated wires is as close to zero as possible. As a high-speed signal transmission cable that can be assembled and processed so that a plurality of differential signal pair wires can be arranged in parallel in a plane at a predetermined pitch interval, they cross the longitudinal direction of these differential signal pair wires. There is known a high-speed signal transmission cable in which a plurality of fixed tapes are intermittently arranged and a differential signal pair electric wire is integrally held by these fixed tapes (see, for example, Patent Document 2).

また、従来、図６に示すように２本の絶縁電線５４を平行に並べ、それらの両側にドレイン線５６を配置し、これらの外側に、アルミニウム箔付きポリエステルフィルム等の金属プラスチックラミネートテープによる遮蔽層５５を螺旋巻き若しくは縦添えしてなる差動信号対電線５９を複数本平行に並べ、それらの外側に共通の絶縁層３０を設けてなる差動信号伝送ケーブル６１が知られている。また、従来、図７に示すように複数本の差動信号対電線５９を平行に並べ、それらの外側を２枚の絶縁フィルム２８で両側から全面密着させて貼り合わせた構造の差動信号伝送ケーブル６２が知られている。
特開２００１−９３３５７号公報 特開２００３−３１７５５１号公報 Further, conventionally, as shown in FIG. 6, two insulated wires 54 are arranged in parallel, drain wires 56 are arranged on both sides thereof, and shielded by a metal plastic laminate tape such as a polyester film with aluminum foil on the outside thereof. There is known a differential signal transmission cable 61 in which a plurality of differential signal pair wires 59 in which layers 55 are spirally wound or vertically attached are arranged in parallel and a common insulating layer 30 is provided on the outside thereof. Conventionally, as shown in FIG. 7, a plurality of differential signal pair wires 59 are arranged in parallel, and the outside thereof is adhered to each other with two insulating films 28 from both sides and bonded together. Cable 62 is known.
JP 2001-93357 A JP 2003-317551 A

ところで、上記の技術には、次のような解決すべき課題があった。
差動信号対電線を簾状に配置し間欠的に電線どうしを融着したり、差動信号対電線の長手方向に対して横断する複数の固定テープを間欠的に配置した場合には、差動信号対電線の遮蔽層の外周上に絶縁層が必要になる。また、図６に示した構造の差動信号伝送ケーブル６１は、複数本の差動信号対電線５９の外側に共通の絶縁層３０があるため、可撓性に乏しく所望の方向に折り曲げ難く布設時の作業性が悪い。また、図７に示した構造の差動信号伝送ケーブル６２は、絶縁フィルム２８で複数本の差動信号対電線５９を両側から全面に亘って隙間なく貼り合わせているため、全体的に硬くて所望の方向に折り曲げ難く、しかもケーブル端末加工時に絶縁フィルム２８を差動信号対電線５９から除去する作業に多くの時間がかかるという課題がある。 By the way, the above technique has the following problems to be solved.
If the differential signal pair wires are arranged in a bowl shape and the wires are intermittently fused together, or if multiple fixing tapes that are transverse to the longitudinal direction of the differential signal pair wires are placed intermittently, the difference An insulating layer is required on the outer periphery of the shield layer of the dynamic signal pair wire. Further, the differential signal transmission cable 61 having the structure shown in FIG. 6 has a common insulating layer 30 outside the plurality of differential signal pair wires 59, so that it is not flexible and is difficult to bend in a desired direction. Workability at the time is bad. In addition, the differential signal transmission cable 62 having the structure shown in FIG. 7 has a plurality of differential signal pair wires 59 bonded to each other from both sides with no gaps by the insulating film 28, so that it is generally hard. There is a problem that it is difficult to bend in a desired direction, and that it takes a lot of time to remove the insulating film 28 from the differential signal pair electric wire 59 during cable terminal processing.

本発明は、以上の課題を解決するためになされたもので、所望の方向に折り曲げ易く、端末加工時の絶縁フィルムの除去作業及びケーブルとコネクタとの接続作業を容易に行い得る差動信号伝送ケーブルを提供することを目的とする。   The present invention has been made to solve the above-described problems, and is capable of easily bending in a desired direction, and can easily perform an insulating film removal operation and a cable and connector connection operation at the time of terminal processing. The purpose is to provide a cable.

本発明の各実施例においては、それぞれ次のような構成により上記の課題を解決する。
〈構成１〉
２本の絶縁電線と少なくとも１本のドレイン線とが同一平面上に並列配置され、その外周に金属プラスチックラミネートテープの金属面を内側に、かつプラスチック面を外側にして縦添え若しくは螺旋巻きしてなる遮蔽層が設けられた差動信号対電線を備え、上記差動信号対電線の複数本を、それぞれ上記同一平面上に並列配置すると共に、これらの差動信号対電線の平面部に亘って絶縁フィルムを配設したことを特徴とする差動信号伝送ケーブル。 In each embodiment of the present invention, the above-described problems are solved by the following configurations.
<Configuration 1>
Two insulated wires and at least one drain wire are arranged in parallel on the same plane, and the metal plastic laminate tape is attached to the outer periphery with the metal surface on the inside and the plastic surface on the outside, or vertically or spirally wound. A differential signal pair wire provided with a shielding layer, and a plurality of the differential signal pair wires arranged in parallel on the same plane, and over the flat portion of these differential signal pair wires A differential signal transmission cable comprising an insulating film.

所望の方向に折り曲げ易く、端末加工時の絶縁フィルムの除去作業及びケーブルとコネクタとの接続作業が容易に行い得る。   It is easy to bend in a desired direction, and the removal work of the insulating film and the connection work between the cable and the connector can be easily performed during terminal processing.

〈構成２〉
構成１記載の差動信号伝送ケーブルにおいて、上記絶縁フィルムの２枚を、上記複数の差動信号対電線の両平面部にそれぞれ対向配置して上記差動信号対電線には接着し、かつ絶縁フィルムどうしでは接着しないように配設したことを特徴とする差動信号伝送ケーブル。 <Configuration 2>
In the differential signal transmission cable according to Configuration 1, two sheets of the insulating film are respectively arranged opposite to both flat portions of the plurality of differential signal pair wires, bonded to the differential signal pair wires, and insulated. A differential signal transmission cable characterized in that it is arranged so that it does not adhere between films.

差動信号対電線を絶縁フィルムで全長に亘って固定することで、差動信号対電線の絶縁特性を確保でき、また外層の絶縁層を必要としないのでケーブル自体を薄くできる。   By fixing the differential signal pair wire over the entire length with an insulating film, the insulation characteristics of the differential signal pair wire can be secured, and since the outer insulating layer is not required, the cable itself can be thinned.

〈構成３〉
構成１記載の差動信号伝送ケーブルにおいて、上記絶縁フィルムの１枚を、上記複数の差動信号対電線の一方平面部に対向配置すると共に上記差動信号対電線に接着するように配設したことを特徴とする差動信号伝送ケーブル。 <Configuration 3>
In the differential signal transmission cable according to Configuration 1, one of the insulating films is disposed so as to be opposed to one flat portion of the plurality of differential signal pair wires and to be adhered to the differential signal pair wires. A differential signal transmission cable characterized by that.

差動信号対電線の遮蔽層を形成する金属プラスチックラミネートテープの金属面を内側に、かつプラスチック面を外側にして縦添え若しくは螺旋巻きにすることで金属ラミネートテープのプラスチック層により絶縁特性が確保できるので、差動信号対電線の遮蔽層の外層に絶縁層を必要としない。従ってケーブル自体を薄くできるのでケーブル自体の可撓性が良く所望の方向に曲げやすく、絶縁フィルムの除去作業が容易になるのでケーブルとコネクタとの接続作業が容易になる。   Insulating properties can be ensured by the plastic layer of the metal laminate tape by attaching the metal surface of the metal plastic laminate tape that forms the shielding layer of the differential signal pair wire to the inside and the plastic surface to the outside, and adding or spirally winding the metal surface. Therefore, an insulating layer is not required on the outer layer of the shielding layer of the differential signal pair wire. Therefore, since the cable itself can be made thin, the cable itself has good flexibility and can be easily bent in a desired direction, and the insulation film can be easily removed, so that the connection work between the cable and the connector is facilitated.

〈構成４〉
構成１ないし３のいずれかに記載の差動信号伝送ケーブルにおいて、上記複数本の差動信号対電線及び絶縁フィルムを、アコーデオン蛇腹状に左右に折り畳んだことを特徴とする差動信号伝送ケーブル。 <Configuration 4>
4. The differential signal transmission cable according to any one of configurations 1 to 3, wherein the plurality of differential signal pair wires and the insulating film are folded left and right in an accordion bellows shape.

アコーデオン蛇腹状に折り畳むことで、折り畳んだ幅方向に折り曲げることが可能になる。   By folding in an accordion bellows shape, it is possible to bend in the folded width direction.

〈構成５〉
構成４記載の差動信号伝送ケーブルにおいて、上記複数本の差動信号対電線及び絶縁フィルムに捩りを加えたことを特徴とする差動信号伝送ケーブル。 <Configuration 5>
5. The differential signal transmission cable according to Configuration 4, wherein the plurality of differential signal pair wires and the insulating film are twisted.

ケーブルに捻りを加えることで可撓性が付与されるので、ケーブルが曲がり易くなる。   Since the flexibility is imparted by twisting the cable, the cable is easily bent.

以下、本発明の実施の形態を実施例ごとに詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail for each example.

図１は実施例１の差動信号伝送ケーブルを示す横断面図、図２はその一部を構成する差動信号対電線を示す斜視図である。
図１、図２において、この差動信号伝送ケーブル２２は、２本の絶縁電線１２と２本のドレイン線１４とが同一平面上に並列配置され、その外周に金属プラスチックラミネートテープによる遮蔽層１６が設けられた差動信号対電線１８を備え、差動信号対電線１８の複数本を、それぞれ同一平面上に並列配置すると共に、これらの差動信号対電線１８の平面部に亘って絶縁フィルム２０を配置して構成されている。なお、差動信号対電線１８の平面部とは、図１に示すように、差動信号対電線１８を横断面でみたときに、絶縁電線１２とドレイン線の配列方向にほぼ平行な外面２３をいうものとする。 FIG. 1 is a cross-sectional view showing a differential signal transmission cable according to the first embodiment, and FIG. 2 is a perspective view showing a differential signal pair electric wire constituting a part thereof.
1 and 2, the differential signal transmission cable 22 includes two insulated wires 12 and two drain wires 14 arranged in parallel on the same plane, and a shielding layer 16 made of a metal plastic laminate tape on the outer periphery thereof. The differential signal pair electric wire 18 is provided, and a plurality of differential signal pair electric wires 18 are arranged in parallel on the same plane, respectively, and an insulating film is provided over the flat portion of the differential signal pair electric wire 18. 20 is arranged. As shown in FIG. 1, the flat portion of the differential signal pair wire 18 is an outer surface 23 substantially parallel to the arrangement direction of the insulated wire 12 and the drain wire when the differential signal pair wire 18 is viewed in a cross section. It shall be said.

絶縁電線１２は、例えば、錫めっき軟銅線あるいは錫めっき軟銅撚線を中心導体とし、この中心導体の外周に、ポリエチレン、フッ素樹脂等の高周波でも安定した低誘電率の絶縁材料からなる絶縁層を有する信号線である。遮蔽層１６は、アルミニウム箔付きあるいは銅箔付きのポリエステルテープ等の金属プラスチックラミネートテープを、金属面を内側にして２本の絶縁電線１２と２本のドレイン線１４の周囲に螺旋巻き若しくは縦添えすることにより形成されている。なお、ここでドレイン線１４は１本の場合でもよい。   The insulated wire 12 has, for example, a tin-plated annealed copper wire or a tin-plated annealed copper twisted wire as a central conductor, and an insulating layer made of an insulating material having a low dielectric constant that is stable at high frequencies, such as polyethylene and fluororesin, on the outer periphery of the central conductor. A signal line. The shielding layer 16 is made of a metal plastic laminate tape such as polyester tape with aluminum foil or copper foil spirally or vertically attached around the two insulated wires 12 and the two drain wires 14 with the metal surface facing inward. It is formed by doing. Here, the number of drain lines 14 may be one.

絶縁フィルム２０は、図１に示すように、２枚使用され、同一平面上に並列配置された複数の差動信号対電線１８の両平面部２３にそれぞれ対向配置され、差動信号対電線１８には接着され、かつ絶縁フィルム２０どうしでは接着しないように配設されている。   As shown in FIG. 1, two insulating films 20 are used, and are arranged opposite to both flat portions 23 of a plurality of differential signal pair wires 18 arranged in parallel on the same plane. The insulating film 20 is disposed so as not to adhere to each other.

差動信号伝送ケーブル２２は、絶縁フィルム２０が差動信号対電線１８には接着され、かつ絶縁フィルム２０どうしでは接着しないようにされているので、図７に示したように絶縁フィルム２０どうしで接着した場合と比べて、絶縁フィルム２０が格段に曲がり易くなっている。従って、図３に示すように、複数本の差動信号対電線１８及び絶縁フィルム２０を、アコーデオン蛇腹状に折り畳むことができる。さらに、全体的に丸く束ねることができる。   In the differential signal transmission cable 22, since the insulating film 20 is bonded to the differential signal pair electric wire 18 and is not bonded between the insulating films 20, as shown in FIG. The insulating film 20 is much easier to bend than when bonded. Therefore, as shown in FIG. 3, the plurality of differential signal pair wires 18 and the insulating film 20 can be folded in an accordion bellows shape. Furthermore, it can be bundled up circularly as a whole.

このように構成することによって、差動信号伝送ケーブル２２がコンパクトに丸く束ねられるが、さらにケーブル長手方向に捻りを加えることでケーブル自体に可撓性を付与することができる。すなわち、フラット状のケーブルを丸く束ねるだけではケーブル自体に可撓性がなく、アコーデオン蛇腹状に折り畳むことで、折り畳んだ折り目方向にはケーブルを曲げることはできないが、幅方向に対しては折り曲げることが可能になる。さらに、アコーデオン蛇腹状に折り畳み全体的に丸く束ねた差動信号伝送ケーブルに捻りを加えることでケーブルに可撓性を与えることができる。   By configuring in this way, the differential signal transmission cable 22 is bundled in a compact and round shape, but by adding twist in the longitudinal direction of the cable, flexibility can be imparted to the cable itself. In other words, the cable itself is not flexible simply by bundling flat cables in a round shape, and by folding in a accordion bellows shape, the cable cannot be bent in the folded fold direction, but it is bent in the width direction. Is possible. Further, the cable can be made flexible by twisting the differential signal transmission cable folded into an accordion bellows and bundled in a round shape.

また、各差動信号対電線１８が間隔を置いた状態となっていることにより、差動信号対電線１８間に切れ目を入れれば絶縁フィルム２０の端部からケーブルに接着している絶縁フィルム２０を剥がすことができる。従って、端末加工時の絶縁フィルム２０の除去作業及びケーブルとコネクタとの接続作業が容易に行い得る。また、各差動信号対電線１８を絶縁フィルム２０で全長に亘って固定することで、差動信号対電線の絶縁特性を確保でき、また外層に絶縁層を必要としないのでケーブル自体を薄くできる。   Moreover, since each differential signal pair electric wire 18 is in a state of being spaced apart, if a cut is made between the differential signal pair electric wires 18, the insulating film 20 adhered to the cable from the end of the insulating film 20. Can be peeled off. Therefore, the removal work of the insulating film 20 at the time of terminal processing and the work of connecting the cable and the connector can be easily performed. Moreover, by fixing each differential signal pair electric wire 18 over the entire length with the insulating film 20, the insulation characteristic of the differential signal pair electric wire can be secured, and since an insulating layer is not required on the outer layer, the cable itself can be thinned. .

図４は実施例２の差動信号伝送ケーブルを示す横断面図である。
この差動信号伝送ケーブル２８は、２本の絶縁電線１２と２本のドレイン線１４とが同一平面上に並列配置され、その外周に金属プラスチックラミネートテープの金属面を内側に、かつプラスチック面を外側にして縦添えによる遮蔽層１６が設けられた差動信号対電線２４を備えている。そして、差動信号対電線２４の複数本を、それぞれ同一平面上に並列配置すると共に、これらの差動信号対電線２４の金属プラスチックラミネートテープの重ね合わせ面の平面部に１枚の絶縁フィルム２６が配置されている。１枚の絶縁フィルム２６は、差動信号対電線２４の一方平面部に接着されている。 FIG. 4 is a cross-sectional view showing the differential signal transmission cable of the second embodiment.
In this differential signal transmission cable 28, two insulated wires 12 and two drain wires 14 are arranged in parallel on the same plane, and the metal surface of the metal plastic laminate tape is placed inside and the plastic surface on the outer periphery. A differential signal pair electric wire 24 provided with a shield layer 16 provided vertically is provided on the outside. A plurality of differential signal pair wires 24 are arranged in parallel on the same plane, and one insulating film 26 is formed on the plane portion of the overlapping surface of the metal plastic laminate tape of these differential signal pair wires 24. Is arranged. One insulating film 26 is bonded to one flat portion of the differential signal pair electric wire 24.

この差動信号伝送ケーブル２８は、ケーブル可撓性がより向上し、所望の方向に折り曲げ易いので、使用時には複数本の差動信号対電線２４及び絶縁フィルム２６を、図３に示すようにアコーデオン蛇腹状に左右に折り畳んだり、捻りを加えたりして全体的に丸く束ねることができる。また、端末加工時の絶縁フィルムの除去作業及びケーブルとコネクタとの接続作業を、さらに容易に行い得る。また、差動信号対電線２４の金属プラスチックラミネートテープの重ね合わせ面の平面部に絶縁フィルム２６を接着したことにより、金属プラスチックラミネートテープの重ね合わせ面がより強固に保持される。   Since the differential signal transmission cable 28 is further improved in cable flexibility and can be easily bent in a desired direction, the differential signal transmission cable 24 and the insulating film 26 are connected to the accordion as shown in FIG. It can be folded into a bellows shape from side to side or twisted to form a whole bundle. In addition, the insulating film removal work and the connection work between the cable and the connector at the time of terminal processing can be performed more easily. Further, the insulating film 26 is adhered to the flat portion of the overlapping surface of the metal plastic laminate tape of the differential signal pair electric wire 24, whereby the overlapping surface of the metal plastic laminate tape is more firmly held.

実施例１の差動信号伝送ケーブルを示す横断面図である。1 is a cross-sectional view showing a differential signal transmission cable of Example 1. FIG. 差動信号対電線を示す斜視図である。It is a perspective view which shows a differential signal pair electric wire. 同差動信号伝送ケーブルの使用例を示す横断面図である。It is a cross-sectional view showing an example of use of the differential signal transmission cable. 実施例２の差動信号伝送ケーブルを示す横断面図である。6 is a cross-sectional view showing a differential signal transmission cable of Example 2. FIG. 従来の差動信号伝送ケーブルを示す横断面図である。It is a cross-sectional view showing a conventional differential signal transmission cable. 従来の他の差動信号伝送ケーブルを示す横断面図である。It is a cross-sectional view showing another conventional differential signal transmission cable. 従来のさらに他の差動信号伝送ケーブルを示す横断面図である。It is a cross-sectional view showing another conventional differential signal transmission cable.

符号の説明Explanation of symbols

１２ 絶縁電線
１４ ドレイン線
１６ 遮蔽層
１８ 差動信号対電線
２０ 絶縁フィルム
２２ 差動信号伝送ケーブル 12 Insulated wire 14 Drain wire 16 Shielding layer 18 Differential signal pair wire 20 Insulating film 22 Differential signal transmission cable

Claims (5)

２本の絶縁電線と少なくとも１本のドレイン線とが同一平面上に並列配置され、その外周に金属プラスチックラミネートテープの金属面を内側に、かつプラスチック面を外側にして縦添え若しくは螺旋巻きしてなる遮蔽層が設けられた差動信号対電線を備え、
前記差動信号対電線の複数本を、それぞれ前記同一平面上に並列配置すると共に、これらの差動信号対電線の平面部に亘って絶縁フィルムを配設したことを特徴とする差動信号伝送ケーブル。 Two insulated wires and at least one drain wire are arranged in parallel on the same plane, and the metal plastic laminate tape is attached to the outer periphery with the metal surface on the inside and the plastic surface on the outside, or vertically or spirally wound. A differential signal pair electric wire provided with a shielding layer,
A plurality of the differential signal pair wires are arranged in parallel on the same plane, respectively, and an insulating film is disposed over the flat portion of the differential signal pair wires. cable. 請求項１記載の差動信号伝送ケーブルにおいて、
前記絶縁フィルムの２枚を、前記複数の差動信号対電線の両平面部にそれぞれ対向配置して前記差動信号対電線には接着し、かつ絶縁フィルムどうしでは接着しないように配設したことを特徴とする差動信号伝送ケーブル。 The differential signal transmission cable according to claim 1,
Two pieces of the insulating film are arranged so as to be opposed to both flat portions of the plurality of differential signal pair wires, and are adhered to the differential signal pair wires, and are not adhered to each other. A differential signal transmission cable characterized by 請求項１記載の差動信号伝送ケーブルにおいて、
前記絶縁フィルムの１枚を、前記複数の差動信号対電線の一方平面部に対向配置すると共に前記差動信号対電線に接着するように配設したことを特徴とする差動信号伝送ケーブル。 The differential signal transmission cable according to claim 1,
A differential signal transmission cable, wherein one of the insulating films is disposed so as to face one flat portion of the plurality of differential signal pair wires and to be adhered to the differential signal pair wires. 請求項１ないし３のいずれかに記載の差動信号伝送ケーブルにおいて、
前記複数本の差動信号対電線及び絶縁フィルムを、アコーデオン蛇腹状に左右に折り畳んだことを特徴とする差動信号伝送ケーブル。 In the differential signal transmission cable according to any one of claims 1 to 3,
A differential signal transmission cable, wherein the plurality of differential signal pair wires and insulating films are folded left and right in an accordion bellows shape. 請求項４記載の差動信号伝送ケーブルにおいて、
前記複数本の差動信号対電線及び絶縁フィルムに捩りを加えたことを特徴とする差動信号伝送ケーブル。 The differential signal transmission cable according to claim 4,
A differential signal transmission cable, wherein the plurality of differential signal pair wires and the insulating film are twisted.
JP2005245953A 2005-08-26 2005-08-26 Differential signal transmission cable Pending JP2007059323A (en)

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