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EP0645780A2 - Fil plat multi-conducteur - Google Patents

Fil plat multi-conducteur Download PDF

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Publication number
EP0645780A2
EP0645780A2 EP94114976A EP94114976A EP0645780A2 EP 0645780 A2 EP0645780 A2 EP 0645780A2 EP 94114976 A EP94114976 A EP 94114976A EP 94114976 A EP94114976 A EP 94114976A EP 0645780 A2 EP0645780 A2 EP 0645780A2
Authority
EP
European Patent Office
Prior art keywords
flat
conductor
wire
conductor wire
flat multi
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.)
Withdrawn
Application number
EP94114976A
Other languages
German (de)
English (en)
Other versions
EP0645780A3 (fr
Inventor
Kazuhito C/O Sumitomo Wiring Sys. Ltd. Saka
Osamu C/O Sumitomo Wiring Okamoto
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 Wiring Systems Ltd
Original Assignee
Sumitomo Wiring Systems 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 Wiring Systems Ltd filed Critical Sumitomo Wiring Systems Ltd
Publication of EP0645780A2 publication Critical patent/EP0645780A2/fr
Publication of EP0645780A3 publication Critical patent/EP0645780A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/0009—Details relating to the conductive cores
    • H01B7/0018—Strip or foil conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables
    • H01B7/0838—Parallel wires, sandwiched between two insulating layers

Definitions

  • the present invention relates to flat multi-conductor wires for use in wiring of office automation equipments, vehicle-mounted electronics and the like.
  • Figs. 6A and 6B illustrate a flat multi-conductor wire known generally as a FPC (flexible printed wiring board) and a FFC (flat flexible wiring board), which comprises a plurality of elongated rectangular conductors 1 in the form of a thin plate or a foil arranged in predetermined spaced relation, and tapes 2a, 2b bonded to top and bottom surfaces of the rectangular conductors 1 in a sandwiched manner throughout the length thereof.
  • the tape 2a on the top surface is removed at opposite ends to expose the rectangular conductors 1.
  • the exposed portions of the rectangular conductors 1 are forced into a connector not shown to contact an internal terminal of the connector for electrical connection thereto.
  • the flat multi-conductor wire shown in Figs. 7A, 7B is disclosed in Japanese Patent Application Laid-Open No. 3-236112 (1991) proposed by the applicant of the present invention which comprises a plurality of round wires 7 juxtaposed in planar, predetermined spaced relation and each including a round conductor 5 and an insulative coating 6 thereon.
  • the coatings 6 are peeled off at opposite ends of the round wires 7 to expose the round conductors 5 to form contact portions 8.
  • a fixing tape 9 provided on the back of the contact portions 8 adheres to the exposed round conductors 5 and the coatings 6 adjacent the contact portions 8.
  • a coupling tape 10 provided on the front of the coatings 6 adjacent the contact portions 8 adheres to the coatings 6.
  • the flat multi-conductor wire such as the FPC, FFC shown in Figs. 6A and 6B
  • the conductors 1 are difficult to bend when the exposed portions of the conductors 1 at their one end are inserted into the connector.
  • the flat multi-conductor wire of Fig. 6 is less flexible in the lateral directions, resulting in difficulty in two-dimensional flexural wiring.
  • the use of the round conductors 5 causes an increased thickness of the whole wire and difficulty in wiring in a small space, as compared with the flat multi-conductor wire of Figs. 6A and 6B employing the rectangular conductors 1.
  • the flat multi-conductor wire of Figs. 7A and 7B is less flexible because of its round shape if the conductors have the same cross sectional area.
  • the whole round conductors 5 are coated with tin in consideration for time and labor to coat only the exposed portions of the round conductors 5 with tin, and the tin is melted by high temperature treatment.
  • the tin coating process of the conductors 5 takes time and labor, and the subsequent high temperature treatment results in oxidation of fabrication jigs.
  • a flat multi-conductor wire comprises: a flat wire group including a plurality of flat wires arranged in planar juxtaposition and each having a rectangular conductor and a coating portion made of an insulative material for covering an outer peripheral surface of the rectangular conductor; a contact portion formed such that the coating portions of the flat wires are removed at an end of the flat wire group to expose the rectangular conductors; a conductor coupling tape bonded to the rectangular conductors in the contact portion and the coating portions adjacent the contact portion on the back of the flat wire group; and a coating coupling tape bonded to the coating portions adjacent the contact portion on the front of the flat wire group.
  • the flat multi-conductor wire of the present invention which includes the plurality of juxtaposed flat wires each having the coated rectangular conductor is thinner and more flexible than the prior art flat multi-conductor wire including the round conductors, thereby permitting small-space wiring.
  • the flat multi-conductor wire of the present invention in which only an adhesive is required to bond the conductor coupling tape to the rectangular conductors in the contact portion because of the rectangular shape of the conductors, requires no high temperature treatment of the contact portion at the end.
  • the flat multi-conductor wire of the present invention is adapted such that the rectangular conductors are loose in portions other than the contact portion at the end, thereby to allow two-dimensional flexural wiring.
  • the flat multi-conductor wire according to the present invention is permitted for use in small-space wiring and two-dimensional flexural wiring and is very effective in wiring of office automation equipments and vehicle-mounted electronics.
  • Fig. 1 is a plan view of a preferred embodiment according to the present invention.
  • Fig. 2 is a side view in cross section taken along the line X-X' of Fig. 1.
  • Fig. 3 is a fragmentary enlarged view of Fig. 2.
  • Fig. 4 is a fragmentary enlarged side view of the preferred embodiment of Fig. 1.
  • Fig. 5 is a perspective view of portions of Fig. 4.
  • a plurality of flat wires 23 are juxtaposed in planar, predetermined spaced relation to form a flat wire group 23A.
  • Each of the flat wires 23 comprises a rectangular conductor 21 of a copper foil or a tinned copper foil, and a coating portion 22 made of an insulative material such as polyvinyl chloride (PVC) or polyethylene (PE) by extrusion and formed on the rectangular conductor 21.
  • PVC polyvinyl chloride
  • PE polyethylene
  • the thickness ta of the rectangular conductors 21 is 0.035 to 0.1 mm, and the width w thereof is 0.3 to 1.0 mm.
  • the thickness tb of the coating portions 22 is preferably 0.1 to 0.3 mm.
  • the wire-to-wire pitch that is the center-to-center distance of the rectangular conductors 21 of the adjacent flat wires 23 in the flat wire group 23A is preferably set to 0.5 mm, 0.8 mm, 1.0 mm, or 1.25 mm.
  • the coating portions 22 at right and left ends of the flat wires 23 in the flat wire group 23A are peeled off to expose the rectangular conductors 21 to form contact portions 25.
  • Conductor coupling tapes 26 made of an insulative material such as polyethylene terephthalate (PET), PVC, polyimide (PI) are provided on the back (bottom surface) of the right and left contact portions 25, respectively, and are bonded to the exposed rectangular conductors 21 and the coating portions 22 adjacent the contact portions 25 with an adhesive to hold the rectangular conductors 21 coupled together.
  • the adhesives used herein may be well-known thermoplastic adhesives and preferably those melted at a relatively low temperature of about 200 °C.
  • Coating coupling tapes 27 made of an insulative material such as PET, PVC PI are provided on the front (top surface) adjacent both the contact portions 25 in the same manner as the conductor coupling tapes 26.
  • the coating coupling tapes 27 are bonded to the coating portions 22 adjacent the contact portions 25 with the above-mentioned thermoplastic adhesive.
  • the ends of the flat wires 23 are held between the coupling tapes 26 and 27, and the flat wires 23 are coupled together at opposite ends thereof by the adhesive force of the adhesive, with the spacing between the flat wires 23 held at a predetermined value. Intermediate portions of the flat wires 23 are held in an uncoupled, loose condition.
  • Arranging the plurality of flat wires 23 having the rectangular conductors 21 in planar, predetermined spaced relation to form the flat wire group 23A and coupling the flat wires 23 together in the contact portions 25 at opposite ends thereof with the coupling tapes 26, 27, provides the flat multi-conductor wire which is thinner and more flexible than the prior art flat multi-conductor wire of Fig. 7 having the round conductors (Japanese Patent Application Laid-Open No. 3-236112) and which is permitted for use in small-space wiring.
  • the rectangular shape of the conductors 21 provides a sufficient adherence between the conductor coupling tapes 26 and the rectangular conductors 21 in the contact portions 25 with the adhesive, thereby eliminating the need for tin coating and high temperature treatment which are executed on the round conductors.
  • the treatment of the contact portions 25 is significantly facilitated.
  • the flat multi-conductor wire of this preferred embodiment includes the flat wires 23 which are loose between the contact portions 25 although similarly employing the rectangular conductors, thereby allowing two-dimensional flexural wiring. Since the flat multi-conductor wire of this preferred embodiment is substantially similar in schematic construction of the contact portions 25 to the FPC and FFC, the existing connector used for the FPC and FFC may be applied to the contact portions 25. There is no need to separately develop and fabricate a connector of special construction.

Landscapes

  • Insulated Conductors (AREA)
EP94114976A 1993-09-24 1994-09-22 Fil plat multi-conducteur. Withdrawn EP0645780A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP261657/93 1993-09-24
JP26165793A JPH0794033A (ja) 1993-09-24 1993-09-24 平型多芯電線

Publications (2)

Publication Number Publication Date
EP0645780A2 true EP0645780A2 (fr) 1995-03-29
EP0645780A3 EP0645780A3 (fr) 1995-05-24

Family

ID=17364958

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94114976A Withdrawn EP0645780A3 (fr) 1993-09-24 1994-09-22 Fil plat multi-conducteur.

Country Status (2)

Country Link
EP (1) EP0645780A3 (fr)
JP (1) JPH0794033A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002080198A1 (fr) * 2001-03-30 2002-10-10 The Ludlow Company Lp Cable souple d'interconnexion possedant des extremites presentant la forme de rubans
WO2003052772A1 (fr) * 2001-12-18 2003-06-26 The Ludlow Company Lp Cable d'interconnexion souple avec des extremites en ruban et procede de fabrication
US6651318B2 (en) 2001-03-30 2003-11-25 Ludlow Company Lp Method of manufacturing flexible interconnect cable
CN109888585A (zh) * 2019-02-22 2019-06-14 今皓光电（昆山）有限公司 一种扁平快速充电线及其加工工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4591166B2 (ja) * 2005-04-13 2010-12-01 住友電気工業株式会社 フラットケーブル及びその製造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2356247A1 (fr) * 1976-06-21 1978-01-20 Advanced Circuit Tech Cable plat pour connexions volantes
GB2128503A (en) * 1982-10-12 1984-05-02 Westinghouse Electric Corp Improvements in or relating to insulated conductors
US5147510A (en) * 1990-02-09 1992-09-15 Sumitomo Wiring Systems, Ltd. Flat multicore wire and method of forming the same wire

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2356247A1 (fr) * 1976-06-21 1978-01-20 Advanced Circuit Tech Cable plat pour connexions volantes
GB2128503A (en) * 1982-10-12 1984-05-02 Westinghouse Electric Corp Improvements in or relating to insulated conductors
US5147510A (en) * 1990-02-09 1992-09-15 Sumitomo Wiring Systems, Ltd. Flat multicore wire and method of forming the same wire

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002080198A1 (fr) * 2001-03-30 2002-10-10 The Ludlow Company Lp Cable souple d'interconnexion possedant des extremites presentant la forme de rubans
US6651318B2 (en) 2001-03-30 2003-11-25 Ludlow Company Lp Method of manufacturing flexible interconnect cable
US8013252B2 (en) 2001-03-30 2011-09-06 Larry Daane Flexible interconnect cable with ribbonized ends
WO2003052772A1 (fr) * 2001-12-18 2003-06-26 The Ludlow Company Lp Cable d'interconnexion souple avec des extremites en ruban et procede de fabrication
CN109888585A (zh) * 2019-02-22 2019-06-14 今皓光电（昆山）有限公司 一种扁平快速充电线及其加工工艺

Also Published As

Publication number Publication date
EP0645780A3 (fr) 1995-05-24
JPH0794033A (ja) 1995-04-07

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