WO1999052116A1 - Cable coaxial, cable multiconducteur, et composants electroniques utilisant ceux-ci - Google Patents

Cable coaxial, cable multiconducteur, et composants electroniques utilisant ceux-ci Download PDF

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Publication number
WO1999052116A1
WO1999052116A1 PCT/JP1999/001744 JP9901744W WO9952116A1 WO 1999052116 A1 WO1999052116 A1 WO 1999052116A1 JP 9901744 W JP9901744 W JP 9901744W WO 9952116 A1 WO9952116 A1 WO 9952116A1
Authority
WO
WIPO (PCT)
Prior art keywords
coaxial
conductor
insulator
cable
shaped conductor
Prior art date
Application number
PCT/JP1999/001744
Other languages
English (en)
Japanese (ja)
Inventor
Kiyonori Yokoi
Akinori Mori
Seiji Endo
Akira Yamamoto
Original Assignee
Sumitomo Electric Industries, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries, Ltd. filed Critical Sumitomo Electric Industries, Ltd.
Priority to EP99910817A priority Critical patent/EP0987720B1/fr
Priority to DE69923740T priority patent/DE69923740T2/de
Priority to KR1019997011217A priority patent/KR100613954B1/ko
Publication of WO1999052116A1 publication Critical patent/WO1999052116A1/fr
Priority to US09/987,044 priority patent/US6894226B2/en
Priority to US10/964,693 priority patent/US7034228B2/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1808—Construction of the conductors
    • H01B11/183—Co-axial cables with at least one helicoidally wound tape-conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors

Definitions

  • the present invention relates to a single-core coaxial element wire, a coaxial cable or a multi-core coaxial cable used for connecting a liquid crystal display inside a notebook computer or a sensor cable of a medical ultrasonic diagnostic apparatus, and an electronic apparatus using the same.
  • a single-core coaxial element wire a coaxial cable or a multi-core coaxial cable used for connecting a liquid crystal display inside a notebook computer or a sensor cable of a medical ultrasonic diagnostic apparatus, and an electronic apparatus using the same.
  • coaxial cables in which a sheath is applied to a coaxial element wire composed of a center conductor, an insulator, and an outer conductor have been used.
  • Such coaxial cables include a single-core cable in which a single coaxial cable is covered, a multi-core cable in which a plurality of single-core cables are provided with a common cover, and a plurality of coaxial cables.
  • a method of arranging coaxial wires or single-core cables in a multi-core cable there is a layered multi-core cable in which coaxial wires or single-core cables are mutually twisted with a flat multi-core cable arranged on a plane.
  • Such a single-core or multi-core coaxial cable may be a combination of cables of the same type or a composite cable combining other types of communication lines and power lines.
  • a metal tape or a laminated tape obtained by laminating a metal tape and an insulating film such as polyester is generally used as an outer conductor (shield).
  • an outer conductor shield
  • braided metal tapes such as those disclosed in Japanese Utility Model Laid-Open No. 2-74772 and Japanese Patent Laid-Open No. 2-77728 are known.
  • the outer conductor is a metal tape braid
  • FIG. 4 is a side view showing a conventional coaxial cable using a braided metal tape.
  • 11 is a center conductor
  • 12 is an insulator
  • 13 is an outer conductor braided with metal tape
  • 14 is a jacket.
  • a metal tape a slit of a wide metal tape is usually used, but a cut surface at the time of slitting the metal tape is used.
  • sharp edges such as burrs remain, and this portion may damage the insulator, or the voltage may be concentrated at this point, and the withstand voltage may decrease. In particular, this problem becomes serious in the case of a thin coaxial cable having a thin insulation thickness of 0.15 mm or less.
  • the conventional coaxial cable can be used to move the sensor wiring for electronic devices, especially for the medical sensor cable, where the cable moves whenever the rotating part, which is the connection between the monitor and the main unit of a notebook computer, or the medical treatment site is changed.
  • the coaxial cable is moved, the static noise is generated due to friction between the insulator and the outer conductor when the coaxial cable moves. Disclosure of the invention
  • the present invention has been obtained as a result of various studies on the above problems, and can be applied to the coaxial cables of the above various forms.
  • the present inventors have used, as an external conductor, a ripon-shaped conductor obtained by rolling and flattening a copper or copper alloy round wire, and spirally winding the ripon-shaped conductor on an insulator to form an outer conductor.
  • a coaxial element wire and a coaxial cable having flexibility, small generation of noise when mechanical movement is performed, and excellent in mechanical durability and having a small outer diameter. This led to the completion of the present invention.
  • the present invention firstly provides a coaxial strand comprising a center conductor, an insulator and an outer conductor, wherein the insulator has a thickness of 0.15 mm or less and a copper or copper alloy round wire is rolled as the outer conductor.
  • a coaxial strand characterized by using a ribbon-shaped conductor that has been flattened, and the ribbon-shaped conductor is spirally wound around an insulator.
  • the insulator is provided in contact with and around the core conductor, and the thickness of the insulator is 0.03 mm at the smallest part.
  • the outer conductor is 0.15 mm or less, and the outer conductor is formed by spirally winding one or more ripon-shaped conductors with a smooth cross section at four corners, with one long side facing the insulator. And a winding angle of the ripon-shaped conductor with respect to the axis of the coaxial wire is 45 degrees or more.
  • the thickness of the insulator is obtained as the thickness of the smallest part by measuring the thickness of the insulator in the circumferential direction.
  • the ribbon-shaped conductor is made of a metal containing copper, It is wound around the insulator with a tension of 30% or more of the tensile breaking tension of the conductor.
  • a single core coaxial cable may be provided by coating the single coaxial strand described above with a jacket.
  • a multi-core cable in which a plurality of the above-described coaxial wires are gathered and provided with a common jacket may be used. Further, the single core coaxial cable may be provided with a common jacket to form a multicore cable.
  • the electronic device is characterized in that the coaxial element wire, the coaxial cable or the multi-core cable is arranged at a position where the electronic device is mechanically turned or bent.
  • the substantially rectangular ripon-shaped conductor having a smooth cross section at four corners can be easily manufactured at low cost by rolling and flattening a copper or copper alloy round wire.
  • the ripon-shaped conductor does not have a sharp edge on the outer periphery of the cross section, there is no problem of damage to the insulator or voltage concentration when wound as an external conductor, and such a substantially rectangular ripon.
  • the conductor has high mechanical strength and is not braided, so it is easy to remove and handle in terminal treatment and the like. Further, the inventors have found that the noise generated in the coaxial cable due to the rotation and bending of the arrangement portion in the electronic device is the electrostatic noise generated due to the friction between the insulator and the outer conductor.
  • the outer conductor of the present invention is spirally wound with one long side of the substantially rectangular shape of the ribbon-shaped conductor facing the insulator, the contact surface between the ribbon-shaped conductor and the insulator has a wider friction. Because of the large size, even when the coaxial cable is bent, the phenomenon that the ripon-shaped conductor moves by rubbing against the insulator does not easily occur, and electrostatic noise is prevented.
  • FIG. 1 is a perspective view showing a single-core coaxial cable using a typical coaxial wire of the present invention
  • FIG. 2 is a schematic diagram for explaining how to wind a ripon-shaped conductor according to the present invention.
  • FIG. 3 is a schematic view showing a cross section of a flat cable as an example of the multi-core cable of the present invention.
  • FIG. 4 is a side view showing a conventional coaxial cable using a braid of metal tape.
  • Fifth a cross-sectional view of the ripon-shaped conductor of the present invention is shown in comparison with a round wire before rolling.
  • FIG. 6 is a diagram illustrating a bending test of a coaxial strand.
  • Fig. 7 shows the twist of the coaxial strand It is a figure explaining a round test.
  • the coaxial cable constituting the coaxial cable of the present invention basically has a thickness of the insulator of 0.15 mm or less, and the coaxial cable can be configured to have a small diameter. It is effective for coaxial cables wired in electronic devices and thin flat multi-core cables that are required to be miniaturized.
  • a copper or copper alloy round wire is rolled and flattened as a lipon-shaped conductor as an outer conductor, and this ripon-shaped conductor is spirally wound on an insulator to form a coaxial strand.
  • FIG. 1 is a perspective view schematically showing a single-core coaxial cable using a typical coaxial wire of the present invention. In FIG.
  • 1, 1 is a central conductor such as copper or a copper alloy
  • 2 is an insulator made of PFA, polyester, polyimide film, etc.
  • 3 is an outer conductor, and a ribbon having a substantially rectangular cross section and a smooth cross section at four corners. It consists of a conductor.
  • This ripon-shaped conductor can be manufactured by chamfering four corners of a rectangular conductor wire.
  • copper or copper alloy round wires can be rolled and flattened, which is advantageous in terms of manufacturing cost.
  • the outer conductor 3 is formed by spirally winding the ribbon-shaped conductor around the insulator 2.
  • Thickness of insulator Electronic devices such as notebook computers and medical sensors change position and angle by human power, so they are required to be smaller and lighter, and coaxial cables to be used are also laid out in narrow spaces. Is done. For this reason, thinner coaxial cables are required.
  • the coaxial cable is deformed by the rotation or bending of the arrangement portion, the strain applied to the coaxial cable, especially to the outer conductor, increases as the outer diameter increases, and the noise generation also increases. For this reason, the thickness of the insulator of the coaxial strand of the present invention and the coaxial strand constituting the coaxial cable must be as thin as 0.15 mm or less.
  • the thickness of the insulator is better as it is thinner, it will be repeatedly deformed by bending and twisting during use, so it will be extremely thin within the range showing moderate mechanical durability and flexibility A value, for example, about 0.03 mm or more is desirable.
  • the ripon-shaped conductor that constitutes the outer conductor is made of a rolled and flattened round wire using a metal conductor such as copper or copper alloy, and this ribbon-shaped A conductor is spirally wound on an insulator to form an external conductor. Since the ripon-shaped conductor is obtained by rolling a round wire as described above, the four corners of the cross section have a smooth shape and a substantially rectangular shape without sharp edges on the entire circumference.
  • the outer conductor is formed by winding one long side of a substantially rectangular shape of the ribbon-shaped conductor toward the insulator.
  • the ribbon-shaped conductor does not have an acute edge like the slit tape of the conventional method, and is not likely to cause damage to the insulator or localization of the voltage, and has a stable withstand voltage characteristic. Obtainable.
  • the tension does not break when the wire is broken, and it is preferably 30% or more and 80% or less of the breaking tension of the ripon-shaped conductor.
  • a layer in which a metal is deposited on a thinner tape may be provided under the outer conductor, in which case the shielding effect can be improved and the dielectric strength characteristics of the insulator can be increased.
  • the winding angle of the ripon-shaped conductor is preferably 45 ° or more in terms of imparting flexibility, and more preferably 60 ° or more.If the angle is too close to a right angle, productivity is extremely reduced, which is preferable. There is no limit, about 80 degrees.
  • the outer conductor preferably has a thickness of not more than 0.03 mm in order to reduce the outer diameter of the coaxial strand and the coaxial cable, and has a thickness of not less than 0.01 mm from the viewpoint of mechanical strength. Desirably.
  • the width of the ripon-shaped conductor is preferably wide from the viewpoint of maintaining the characteristics as the external conductor, and is preferably 0.1 mm or more.The width is narrow from the viewpoint of workability of winding and cost.
  • the thickness is 0.3 mm or less.
  • the outer conductor is a tape with a thickness of 0.025 mm and a width of 0.20 mm produced by rolling a round wire with an outer diameter of 0.08 mm.
  • Conductors and tape-shaped conductors with a thickness of 0.012111111 and a width of 0.18 mm produced by rolling a round wire with an outer diameter of 0.05 mm have excellent properties.
  • Multi-core cable In particular, in the case of the multi-core cable of the present invention, coaxial strands are assembled. In both cases where a common jacket is applied, or when a single core coaxial cable is assembled and a common jacket is applied, the outer conductor of the coaxial wire is formed from a round wire by rolling to form an acute angle around the outer circumference. With a smooth surface without edges, etc., even if a force from the side surface, so-called side pressure, acts on the coaxial wire by twisting, etc., there is no risk that the insulator will be damaged by the external conductor, and the withstand voltage of the insulator will decrease. This eliminates the need to worry about multi-core cables while maintaining the mechanical durability and electrical characteristics of the multi-core cables, and enables thinner and thinner multi-core cables.
  • the present invention will be specifically described by the following examples.
  • PFA tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer
  • resin is applied as an insulator around a 0.09 mm outer diameter center conductor (7 strands of 30 m outer diameter tinplate copper alloy wire).
  • This coaxial wire was subjected to a withstand voltage test as its basic characteristics, a bending test and a torsion test, and an electrostatic noise test as insulation characteristics when used in a rotating or bent portion.
  • a withstand voltage test as its basic characteristics
  • a bending test and a torsion test as insulation characteristics when used in a rotating or bent portion.
  • an electrostatic noise test as insulation characteristics when used in a rotating or bent portion.
  • Fig. 6 schematically shows the test method.
  • the center part of the coaxial strand 20 is sandwiched between two metal rods 22 with an outer diameter of 5 mm, and a load of 50 gf is placed at the lower end.
  • Weight 21 was attached, and the upper end was wrapped 90 degrees around the left and right metal rods and stretched.
  • One bending was performed once for each of the left and right, and the bending was performed 100 times at a speed of 30 times Z. After that, the same pressure resistance test as above was performed, but no pressure failure was recognized, and excellent resistance to repeated bending was confirmed.
  • FIG. 7 schematically shows the test method. Fix the upper end of the 20 cm long coaxial strand 20 to the upper end fixing point 24, attach a load 23 of 50 gf to the lower end and suspend it vertically.This load 23 is the center axis of the coaxial cable. The work was performed clockwise and counterclockwise alternately by 180 degrees around the axis. With each twist of clockwise and counterclockwise as one twist, after twisting 100,000 times at a speed of 30 times, the same withstand voltage test as above was performed. It was not recognized, and excellent resistance to twisting was confirmed.
  • Electrostatic noise characteristics Fig. 7 schematically shows the test method.
  • a 50-cm long coaxial strand is stretched horizontally, a 20-cm-long cotton thread is tied at the center, and the A load of 20 gf was applied to the other end.
  • the weight was allowed to freely fall from the height of the coaxial wire, and the electrostatic noise characteristics were measured as the maximum value of the voltage fluctuation. .
  • the maximum value of the voltage fluctuation generated for this coaxial strand was a maximum of 2.5 mV.
  • the coaxial strands 10 were arranged in parallel and covered with a polyester tape with an adhesive as a jacket 4 to form a flat multicore cable.
  • a single core coaxial cable is formed by coating the coaxial strand with a single core coaxial cable, and the single core coaxial cable is twisted with 30 cores, and a common jacket is applied to the outside of the single core coaxial cable.
  • a thin multi-core cable was obtained while maintaining mechanical durability. It was confirmed that the multi-core cable obtained in this way also had good properties including insulation properties.
  • Example 2 In Example 1, the ribbon-shaped conductor was spirally wound with a tension of 55 gf Zl at a pitch of 0.18 mm and an angle of 75 degrees in a butt winding as shown in FIG. 2 (B). To produce a coaxial strand. The withstand voltage characteristics, bending characteristics, twisting characteristics, and electrostatic noise characteristics of the coaxial strand were also good. Using this coaxial wire, a single-core coaxial cable, a flat multi-core cable and a multi-core cable were produced in the same manner as in Example 1. It was confirmed that the coaxial cable and the multi-core cable obtained in this way also had good properties including insulation properties.
  • Example 1 As shown in FIG. 2 (C), the ripon-shaped conductor was spirally wound at a pitch of 0.29 mm and an angle of 68 degrees under tension of one piece of 65 gf Z (2 pieces in the same direction). Coaxial strands were produced by winding each sheet.
  • a second ribbon-shaped conductor was wound in the opposite direction at a pitch of 0.29 mm and an angle of 68 degrees. The withstand voltage characteristics, bending characteristics, torsion characteristics, and electrostatic noise characteristics of these coaxial wires were good, and the shield characteristics of the outer conductor layer were particularly excellent.
  • a substantially rectangular ripon-shaped conductor having a smooth cross section at the four corners is used as the external conductor, and the ripon-shaped conductor is spirally wound around the insulator to form a coaxial element without the external conductor. Therefore, by using this coaxial element wire, a thin coaxial cable having flexibility and high mechanical durability can be obtained.
  • a plurality of these simultaneous strands or coaxial cables can be assembled and sheathed to use as a multi-core cable.
  • the coaxial cable or multi-core cable obtained in this way in the rotating or bent part of the electronic device, it is possible to obtain an electronic device with excellent insulation characteristics and low electrostatic noise over a long period of time and high quality. Thus, high-speed internal signal transmission can be realized.

Abstract

L'invention concerne un câble coaxial facilitant le retrait d'un conducteur extérieur et donc le traitement des têtes de ce câble, lequel présente d'excellentes propriétés isolantes. Le câble coaxial de cette invention permet par ailleurs une diminution sonore même lorsqu'il se plie ou pivote. Pour former un câble coaxial, on utilise un ou plusieurs torons coaxiaux (1) pourvus d'un conducteur extérieur, ces torons coaxiaux étant créés par enroulement en spirale d'un conducteur en forme de ruban, présentant une section transversale généralement rectangulaire aux coins arrondis à un angle supérieur ou égal à 45°, autour de la circonférence d'un corps isolant. Les câbles coaxiaux ainsi formés sont ensuite disposés de manière à être soumis à un pivotement et à un pliage mécaniques, afin de constituer des composants électroniques.
PCT/JP1999/001744 1998-04-06 1999-04-01 Cable coaxial, cable multiconducteur, et composants electroniques utilisant ceux-ci WO1999052116A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP99910817A EP0987720B1 (fr) 1998-04-06 1999-04-01 Cable coaxial, cable multiconducteur, et composants electroniques utilisant ceux-ci
DE69923740T DE69923740T2 (de) 1998-04-06 1999-04-01 Koaxialkabel, mehradriges kabel, und seine anwendung in elektronikanlagen
KR1019997011217A KR100613954B1 (ko) 1998-04-06 1999-04-01 동축케이블, 다심케이블 및 그것을 사용한 전자기기
US09/987,044 US6894226B2 (en) 1998-04-06 2001-11-13 Coaxial cables, multicore cables, and electronic apparatuses using such cables
US10/964,693 US7034228B2 (en) 1998-04-06 2004-10-15 Coaxial cables, multicore cables, and electronic apparatuses using such cables

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10/108450 1998-04-06
JP10108450A JPH11297132A (ja) 1998-04-06 1998-04-06 同軸ケーブルとそれを使った多心ケーブル

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US44512699A A-371-Of-International 1998-04-06 1999-12-02
US09/987,044 Continuation-In-Part US6894226B2 (en) 1998-04-06 2001-11-13 Coaxial cables, multicore cables, and electronic apparatuses using such cables

Publications (1)

Publication Number Publication Date
WO1999052116A1 true WO1999052116A1 (fr) 1999-10-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1999/001744 WO1999052116A1 (fr) 1998-04-06 1999-04-01 Cable coaxial, cable multiconducteur, et composants electroniques utilisant ceux-ci

Country Status (6)

Country Link
EP (1) EP0987720B1 (fr)
JP (1) JPH11297132A (fr)
KR (1) KR100613954B1 (fr)
DE (1) DE69923740T2 (fr)
TW (1) TW424241B (fr)
WO (1) WO1999052116A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN105355341A (zh) * 2015-12-04 2016-02-24 北京玻钢院复合材料有限公司 实心芯棒、绝缘子及制造方法

Families Citing this family (6)

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Publication number Priority date Publication date Assignee Title
KR200445224Y1 (ko) * 2008-11-26 2009-07-08 권정태 음성신호전달용 케이블
JP2012227055A (ja) * 2011-04-21 2012-11-15 Hitachi Cable Fine Tech Ltd フラットケーブル及びそれを用いたケーブルハーネス
CH707152A8 (de) * 2012-10-26 2014-07-15 Huber+Suhner Ag Mikrowellenkabel sowie Verfahren zum Herstellen und Anwendung eines solchen Mikrowellenkabels.
CN203631153U (zh) * 2013-11-08 2014-06-04 东莞讯滔电子有限公司 圆形线缆
DE102014013555B4 (de) * 2014-09-18 2016-09-22 Hartmut Bayer Kabel zur Signalübertragung, Verfahren zu dessen Herstellung und Verwendung eines solchen Kabels zur Übertragung von Audiosignalen
JP6380873B1 (ja) * 2017-11-28 2018-08-29 日立金属株式会社 編組シールド付ケーブル

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JPH0419923A (ja) * 1990-05-11 1992-01-23 Hitachi Cable Ltd 同軸ケーブルの製造方法
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JPH08195130A (ja) * 1995-01-17 1996-07-30 Hitachi Cable Ltd 車両用ケーブル

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US4365109A (en) * 1980-01-25 1982-12-21 The United States Of America As Represented By The Secretary Of The Air Force Coaxial cable design
DE8804552U1 (fr) * 1988-04-06 1988-06-09 Sun Audio Unterhaltungselektronik Vertriebs Gmbh, 8000 Muenchen, De
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JPH0419923A (ja) * 1990-05-11 1992-01-23 Hitachi Cable Ltd 同軸ケーブルの製造方法
JPH0583940U (ja) * 1992-04-17 1993-11-12 東京特殊電線株式会社 カールケーブル
JPH07169334A (ja) * 1993-10-08 1995-07-04 Furukawa Electric Co Ltd:The 発泡フッ素樹脂絶縁電線およびその製造方法
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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN105355341A (zh) * 2015-12-04 2016-02-24 北京玻钢院复合材料有限公司 实心芯棒、绝缘子及制造方法
CN105355341B (zh) * 2015-12-04 2017-01-11 北京玻钢院复合材料有限公司 实心芯棒、绝缘子及制造方法

Also Published As

Publication number Publication date
KR20010013227A (fr) 2001-02-26
JPH11297132A (ja) 1999-10-29
EP0987720A1 (fr) 2000-03-22
TW424241B (en) 2001-03-01
DE69923740T2 (de) 2006-01-19
DE69923740D1 (de) 2005-03-24
EP0987720B1 (fr) 2005-02-16
EP0987720A4 (fr) 2002-03-20
KR100613954B1 (ko) 2006-08-18

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