EP0987720A1 - Koaxialkabel, mehradriges kabel, und seine anwendung in elektronikanlagen - Google Patents

Koaxialkabel, mehradriges kabel, und seine anwendung in elektronikanlagen Download PDF

Info

Publication number
EP0987720A1
EP0987720A1 EP99910817A EP99910817A EP0987720A1 EP 0987720 A1 EP0987720 A1 EP 0987720A1 EP 99910817 A EP99910817 A EP 99910817A EP 99910817 A EP99910817 A EP 99910817A EP 0987720 A1 EP0987720 A1 EP 0987720A1
Authority
EP
European Patent Office
Prior art keywords
coaxial
insulation layer
ribbon
element wire
conductor
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP99910817A
Other languages
English (en)
French (fr)
Other versions
EP0987720A4 (de
EP0987720B1 (de
Inventor
Kiyonori Kantoh Works YOKOI
Akinori Kantoh Works MORI
Seiji Kantoh Works ENDO
Akira Kantoh Works YAMAMOTO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
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
Publication of EP0987720A1 publication Critical patent/EP0987720A1/de
Publication of EP0987720A4 publication Critical patent/EP0987720A4/de
Application granted granted Critical
Publication of EP0987720B1 publication Critical patent/EP0987720B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 single-core coaxial element wires or coaxial cables, or multicore coaxial cables which are used for the connection of a liquid crystal display within a notebook computer, or for sensor cables within a medical-purpose ultrasonic wave diagnostic apparatus, and the like, and further, relates to electronic apparatuses using the same.
  • Coaxial cables comprising a coaxial element wire, made up of a center conductor, an insulation layer, and an outer conductor, and a jacket disposed over the coaxial element wire have been in use thus far. Included among the types of coaxial cables are a single-core cable formed by providing a single coaxial element wire with a jacket, a multicore cable formed by providing a plurality of single-core cables with a common jacket, and a multicore cable formed by providing a plurality of coaxial element wires with a common jacket.
  • a flat-type multicore cable obtained by arranging coaxial element wires or coaxial cables on a plane and a twisted-layer multicore cable obtained by twisting them together.
  • a twisted-layer multicore cable obtained by twisting them together.
  • a metallic tape or a laminate tape obtained by laminating a metallic tape and an insulating film of polyester or the like is generally used as the outer conductor (shield).
  • a braided structure of metallic tapes as disclosed in Japanese Laid-open Utility Model No. Hei 2-47726 and No. Hei 2-47728 is known.
  • the advantage of the outer conductor when it is formed of braided metal tapes is that it does not become loose.
  • its disadvantage is that removal of the outer conductor is troublesome when, for example, making a terminal treatment.
  • FIG. 4 is a side view showing a conventional coaxial cable employing braided metallic tapes.
  • reference numeral 11 denotes a center conductor
  • 12 denotes an insulation layer
  • 13 denotes an outer conductor formed by braiding metallic tapes
  • 14 denotes a jacket.
  • Metallic tapes obtained by slitting a wide metallic tape are normally used.
  • the present invention was made as a result of the various investigations which the inventors had conducted on the above described problems and it can be applied to coaxial cables of various types as described above.
  • the inventors have found that a coaxial element wire and a coaxial cable being flexible, producing minimal noise when making a mechanical movement, having good mechanical durability, and being small in outer diameter can be obtained by helically wrapping, around the insulation layer, a ribbon-shaped conductor obtained by rolling and flattening a copper or copper alloy wire and thereby constructing an outer conductor, and have thus completed the present invention.
  • the invention is of a coaxial element wire formed of a center conductor, an insulation layer, and an outer conductor and the coaxial element wire is characterized in that it has an insulation layer of 0.15 mm or less in thickness; it uses as the outer conductor a ribbon-shaped conductor obtained by rolling and flattening a copper or copper alloy round wire; and it has the ribbon-shaped conductor helically wrapped around the insulation layer.
  • the invention is a coaxial element wire formed of a center conductor, an insulation layer, and an outer conductor and the coaxial element wire is characterized in that the insulation layer is disposed around the center conductor in contact therewith; the insulation layer has a thickness of 0.03 mm or more and not greater than 0.15 mm at the portion where the thickness is smallest; the outer conductor is constructed by helically wrapping one or a plurality of ribbon-shaped conductors, whose cross-section is virtually a rectangle having the four corners smoothed, around the insulation layer such that one long side thereof faces the insulation layer; and the wrapping angle of the ribbon-shaped conductor with respect to the axis of the coaxial element wire is 45 degrees or more.
  • the thickness of the insulation layer is given by the thickness at the portion where the smallest value is obtained in the measurement of the insulation layer thickness in the circumferential direction.
  • the invention is characterized in that the ribbon-shaped conductor is made of a metal including copper and the ribbon-shaped conductor is wrapped around the insulation layer under a tension of 30% or more of the tensile strength of the ribbon-shaped conductor.
  • coaxial element wire may be provided with a jacket so as to be formed into a single-core coaxial cable.
  • a plurality of the above described coaxial element wires may be combined and provided with a common jacket so as to be formed into a multicore cable.
  • the aforesaid single-core coaxial cables may be provided with a common jacket to be formed into a multicore cable.
  • the invention is an electronic apparatus characterized in that the above described coaxial element wire, coaxial cable, or multicore cable is disposed therein at a place where the wire or cable is subjected to mechanical rotation or bending of the electronic apparatus.
  • the ribbon-shaped conductor used here of a virtually rectangular cross section having its four corners smoothed, can be manufactured with ease and at low cost by rolling and flattening a round wire of copper or a copper alloy.
  • the ribbon-shaped conductor has no edge that forms an acute angle at the circumference of the cross-section, and therefore, when the same is helically mounted as the outer conductor, harm to the insulation layer or voltage concentration does not occur.
  • such a ribbon-shaped conductor of a virtually rectangular cross section has high mechanical strength and, because it is not braided, it can be removed with no trouble when, for example, making a terminal treatment.
  • the noise occurring in a coaxial cable due to rotation or bending at the portion where it is disposed in an electronic apparatus is an electrostatic noise caused by friction between the insulation layer and the outer conductor.
  • the outer conductor of the present invention is helically mounted with one long side of the virtually rectangular form of the ribbon-shaped conductor facing the insulation layer, the area of the contact face between the ribbon-shaped conductor and the insulation layer is sufficiently large to increase friction therebetween and, hence impedes the phenomenon of sliding movement of the ribbon-shaped conductor and the insulation layer along each other, thereby suppressing the occurrence of electrostatic noise.
  • the coaxial element wire constituting the coaxial cable of the present invention basically has an insulation layer with a thickness of 0.15 mm or less, and hence, the coaxial element wire can be made smaller in diameter. Accordingly, positive effects of the invention are exhibited especially when it is applied to a coaxial cable or a thin flat type multicore cable for use in wiring in an electronic apparatus which has a small space for wiring and hence requires decrease in the volume of wires and cables occupying the space.
  • the coaxial element wire is constructed by using as the outer conductor a ribbon-shaped conductor obtained by pressing and flattening a copper or copper alloy round wire and helically wrapping the ribbon-shaped conductor around the insulation layer.
  • Figure 1 is a perspective view schematically showing a single-core coaxial cable employing a typical coaxial element wire of the present invention.
  • reference numeral 1 denotes a center conductor of copper, copper alloy, or the like
  • 2 denotes an insulation layer made of PFA, polyester, polyimide film, or the like
  • 3 denotes an outer conductor formed of a ribbon-shaped conductor whose cross-section is virtually a rectangle having its four corners smoothed.
  • the ribbon-shaped conductor can be produced by such a method as chamfering four corners of a rectangular conductor. It can also be manufactured by pressing and flattening a copper or copper alloy round wire, which is advantageous in terms of production cost.
  • the ribbon-shaped conductor is helically wrapped around the insulation layer 2 to provide the outer conductor 3.
  • a tin-plated round wire of a copper alloy of 0.05 mm in outer diameter having a cross section as shown in FIG. 5(A) was pressed and thereby a long ribbon-shaped conductor 0.012 mm thick and 0.18 mm wide having a cross section as shown in FIG. 5(B) was manufactured.
  • PFA tetrafluoroethelene-perfluoroalkylvinylether copolymer resin was extruded to cover the periphery of a center conductor of 0.09 mm in outer diameter (seven tin-plated copper-alloy wires of 30 ⁇ m in outer diameter being stranded) by a known extruding and covering method so that a circular profile of 0.23 mm in outer diameter is formed. Then, the above described tape-shaped conductor was helically wrapped around the same, so as to form an angle of 68 degrees with respect to the axis of the coaxial element wire, by open wrapping as shown in FIG. 2(A), spaced apart at a pitch of 0.29 mm, under a tension of 60 gf per piece, and thereby a coaxial element wire was manufactured.
  • Mandrel bending test The testing method is schematically shown in FIG. 6. Having a coaxial element wire 20 held, at its center portion, between two metallic bars 22 of 5 mm in outer diameter and having a load 21 of 50 gf attached to its lower end, the upper end portion was bent so as to be wrapped around the metallic bar on one side at 90 degrees, then straightened, and then wrapped around the metallic bar on the other side at 90 degrees. Counting a set of bending to one side and the other side as one cycle, 1000 cycles of the bending operation was carried out at a rate of 30 cycles/minute. Thereafter, the withstand voltage test as described above was carried out on the article, in which no inferiority in withstand voltage was observed. Thus, it has been confirmed that the coaxial element wire has excellent characteristics against repeated bending.
  • Torsion test The testing method is schematically shown in FIG. 7.
  • a coaxial element wire 20 of a length of 20 cm was vertically hanged down having the upper end thereof fixed to an upper end fixing point 24 and having a load 23 of 50 gf attached to the lower end thereof.
  • the load 23 was caused to alternately turn 180 degrees around the center axis of the coaxial cable clockwise and counterclockwise.
  • Counting a set of twisting clockwise and counterclockwise as one cycle 1000 cycles of the twisting operation were carried out at the rate of 30 cycles/minute.
  • the withstand voltage test as described above was carried out on the coaxial element wire, in which no inferiority in withstand voltage was observed.
  • the coaxial element wire has excellent characteristics against repeated twisting.
  • Electrostatic noise characteristic In order to further evaluate the value of the electrostatic noise produced at the time when an abrupt deformation is caused to a coaxial element wire, a coaxial element wire of a length of 50 cm was horizontally stretched, a cotton wire of a length of 20 cm was attached to the center thereof, and a load of 20 gf was attached to the other end of the cotton wire. While the voltage between the center conductor and the outer conductor of the coaxial element wire was measured with a voltmeter, the weight was allowed to fall by its own weight from the altitude of the coaxial element wire, and the electrostatic noise characteristic was measured as the maximum value of the voltage variation. As a result of the measurements performed ten times in the same manner, a maximum of 2.5 mV was obtained as the maximum voltage variation. Meanwhile, a similar evaluation was made on a coaxial element wire having an outer conductor made of the conventional braided type shown in Fig. 4.
  • the maximum value of the voltage variation was as high as 100 mV. From this result, it has been confirmed that substatial improvement in attenuating the electrostatic noise can be obtained by utilizing the present invention.
  • Example 1 a coaxial element wire was produced by helical wrapping of a ribbon-shaped conductor under a tension of 55 gf per piece, at a pitch of 0.18 mm, at an angle of 75 degrees, and in a butt-joined manner as shown in FIG. 2(B).
  • This coaxial element wire was excellent in all of the withstand voltage characteristics, bending characteristics, torsion characteristics, and electrostatic noise characteristics.
  • a single-core coaxial cable, a flat type multicore cable, and a multicore cable were produced in the same manner as in Example 1.
  • Example 1 a coaxial element wire was produced by helical wrapping of ribbon-shaped conductors under a tension of 65 gf per piece, at a pitch of 0.29 mm, and at an angle of 68 degrees (double sheets were wrapped, each in open wrapping, in the same direction) as shown in FIG. 2(C).
  • the coaxial element wire shown in FIG. 2(D) was also produced by wrapping ribbon-shaped conductors at a pitch of 0.29 mm and at an angle of 68 degrees, with the second one wrapped in the opposite direction.
  • These coaxial element wires had excellent withstand voltage characteristics, bending characteristics, torsion characteristics, and electrostatic noise characteristics and especially excellent shielding characteristics of the outer conductor layer. Also by the use of these coaxial element wires, a single-core coaxial cable, a flat type multicore cable, and a multicore cable were produced in the same manner as in Example 1.
  • a coaxial element wire is produced by using a ribbon-shaped conductor of a virtually rectangular cross-section with four corners thereof smoothed as the outer conductor and wrapping the ribbon-shaped conductor around the insulation layer to provide the outer conductor, a small-diameter coaxial cable being flexible and excellent in mechanical durability can be provided by the use of the coaxial element wire.

Landscapes

  • Communication Cables (AREA)
EP99910817A 1998-04-06 1999-04-01 Koaxialkabel, mehradriges kabel, und seine anwendung in elektronikanlagen Expired - Lifetime EP0987720B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP10845098 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
PCT/JP1999/001744 WO1999052116A1 (fr) 1998-04-06 1999-04-01 Cable coaxial, cable multiconducteur, et composants electroniques utilisant ceux-ci

Publications (3)

Publication Number Publication Date
EP0987720A1 true EP0987720A1 (de) 2000-03-22
EP0987720A4 EP0987720A4 (de) 2002-03-20
EP0987720B1 EP0987720B1 (de) 2005-02-16

Family

ID=14485097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99910817A Expired - Lifetime EP0987720B1 (de) 1998-04-06 1999-04-01 Koaxialkabel, mehradriges kabel, und seine anwendung in elektronikanlagen

Country Status (6)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103680694A (zh) * 2013-11-08 2014-03-26 东莞讯滔电子有限公司 圆形线缆
CH707152A1 (de) * 2012-10-26 2014-04-30 Huber+Suhner Ag Mikrowellenkabel sowie Verfahren zum Herstellen und Anwendung eines solchen Mikrowellenkabels.

Families Citing this family (5)

* Cited by examiner, † Cited by third party
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
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
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
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (de) * 1988-04-06 1988-06-09 Sun Audio Unterhaltungselektronik Vertriebs GmbH, 8000 München Elektrisches Leiterkabel zur Übertragung von Tonfrequenzsignalen im Audiobereich

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2658498B2 (ja) * 1990-05-11 1997-09-30 日立電線株式会社 同軸ケーブルの製造方法
JP2567300Y2 (ja) * 1992-04-17 1998-04-02 東京特殊電線株式会社 細径カールケーブル
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
JPH08195130A (ja) * 1995-01-17 1996-07-30 Hitachi Cable Ltd 車両用ケーブル
EP0759624A1 (de) * 1995-08-19 1997-02-26 Alcatel Kabel AG & Co. Elektrisches Kabel zur Nachrichtenübertragung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (de) * 1988-04-06 1988-06-09 Sun Audio Unterhaltungselektronik Vertriebs GmbH, 8000 München Elektrisches Leiterkabel zur Übertragung von Tonfrequenzsignalen im Audiobereich

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9952116A1 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH707152A1 (de) * 2012-10-26 2014-04-30 Huber+Suhner Ag Mikrowellenkabel sowie Verfahren zum Herstellen und Anwendung eines solchen Mikrowellenkabels.
WO2014063994A1 (de) * 2012-10-26 2014-05-01 Huber+Suhner Ag Mikrowellenkabel sowie verfahren zum herstellen und anwendung eines solchen mikrowellenkabels
US9666335B2 (en) 2012-10-26 2017-05-30 Huber+Suhner Ag Microwave cable and method for producing and using such a microwave cable
CN103680694A (zh) * 2013-11-08 2014-03-26 东莞讯滔电子有限公司 圆形线缆

Also Published As

Publication number Publication date
JPH11297132A (ja) 1999-10-29
TW424241B (en) 2001-03-01
EP0987720A4 (de) 2002-03-20
DE69923740T2 (de) 2006-01-19
DE69923740D1 (de) 2005-03-24
WO1999052116A1 (fr) 1999-10-14
KR100613954B1 (ko) 2006-08-18
KR20010013227A (ko) 2001-02-26
EP0987720B1 (de) 2005-02-16

Similar Documents

Publication Publication Date Title
US7034228B2 (en) Coaxial cables, multicore cables, and electronic apparatuses using such cables
US5552565A (en) Multiconductor shielded transducer cable
JP4456696B2 (ja) 同軸ケーブル素線、同軸ケーブル、及び同軸ケーブルバンドル
EP2202760B1 (de) Koaxialkabel und mehrkern-koaxialkabel
US7544886B2 (en) Extra-fine copper alloy wire, extra-fine copper alloy twisted wire, extra-fine insulated wire, coaxial cable, multicore cable and manufacturing method thereof
JPH053085B2 (de)
WO2010123105A1 (ja) 電線及びその製造方法
EP1783784A1 (de) Elektrische leitung für kraftfahrzeuge
JP6164844B2 (ja) 絶縁電線、同軸ケーブル及び多心ケーブル
EP0987720B1 (de) Koaxialkabel, mehradriges kabel, und seine anwendung in elektronikanlagen
JP3918643B2 (ja) 極細多心同軸ケーブル
JP2002515630A (ja) 電気信号ケーブル
JP3606141B2 (ja) 同軸素線、同軸ケーブル及びそれを用いた電子機器
CN112635121A (zh) 同心式光纤复合导线电缆及其制备工艺
CN213988402U (zh) 同心式光纤复合导线电缆
CN112313759B (zh) 同轴线缆
CN115066732A (zh) 同轴电缆
JPH0743866Y2 (ja) プローブケーブル
CN114822930B (zh) 柔性软屏蔽电缆及其制备方法
JP2008258172A (ja) 同軸ケーブル素線、同軸ケーブル、及び同軸ケーブルバンドル
JP5323360B2 (ja) 集合ケーブル
TR2021016267A2 (tr) Sektör şeki̇lli̇ esnek kablo
JP2004199976A (ja) ２重横巻２心平行極細同軸ケーブル

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19991222

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR IT

A4 Supplementary search report drawn up and despatched

Effective date: 20020201

AK Designated contracting states

Kind code of ref document: A4

Designated state(s): DE FR IT

17Q First examination report despatched

Effective date: 20040310

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT

REF Corresponds to:

Ref document number: 69923740

Country of ref document: DE

Date of ref document: 20050324

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20051117

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20130327

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20130625

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20140314

Year of fee payment: 16

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69923740

Country of ref document: DE

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20141231

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69923740

Country of ref document: DE

Effective date: 20141101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150401