WO2015123864A1 - Wiring member and manufacturing method thereof - Google Patents

Wiring member and manufacturing method thereof Download PDF

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Publication number
WO2015123864A1
WO2015123864A1 PCT/CN2014/072382 CN2014072382W WO2015123864A1 WO 2015123864 A1 WO2015123864 A1 WO 2015123864A1 CN 2014072382 W CN2014072382 W CN 2014072382W WO 2015123864 A1 WO2015123864 A1 WO 2015123864A1
Authority
WO
WIPO (PCT)
Prior art keywords
coaxial cables
conductors
plural
connection board
center
Prior art date
Application number
PCT/CN2014/072382
Other languages
French (fr)
Inventor
Nobuyuki Yamazaki
Takayoshi Koinuma
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 CN201480075871.8A priority Critical patent/CN106030729B/en
Priority to PCT/CN2014/072382 priority patent/WO2015123864A1/en
Priority to JP2016570151A priority patent/JP6252694B2/en
Publication of WO2015123864A1 publication Critical patent/WO2015123864A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H01R4/023—Soldered or welded connections between cables or wires and terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/59—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/594—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures for shielded flat cable
    • H01R12/598—Each conductor being individually surrounded by shield, e.g. multiple coaxial cables in flat structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H01R43/0256—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections for soldering or welding connectors to a printed circuit board
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/28—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wire processing before connecting to contact members, not provided for in groups H01R43/02 - H01R43/26
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
    • H01R9/0515—Connection to a rigid planar substrate, e.g. printed circuit board
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/303—Surface mounted components, e.g. affixing before soldering, aligning means, spacing means
    • H05K3/305—Affixing by adhesive
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/3405—Edge mounted components, e.g. terminals
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/11—Printed elements for providing electric connections to or between printed circuits
    • H05K1/117—Pads along the edge of rigid circuit boards, e.g. for pluggable connectors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/09372—Pads and lands
    • H05K2201/09409—Multiple rows of pads, lands, terminals or dummy patterns; Multiple rows of mounted components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10227—Other objects, e.g. metallic pieces
    • H05K2201/10356—Cables
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/22—Secondary treatment of printed circuits
    • H05K3/28—Applying non-metallic protective coatings
    • H05K3/281—Applying non-metallic protective coatings by means of a preformed insulating foil
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a wiring member having a coaxial flat cable and a manufacturing method thereof.
  • Coaxial cable harnesses having plural coaxial cables are known as cables for connection between apparatus or inside an apparatus (refer to Patent document 1).
  • An object of the present invention is to provide a high-quality wiring member in which the center conductors are positioned accurately with respect to respective terminal members of a board and connected to them reliably, as well as a manufacturing method thereof.
  • a wiring member according to one aspect of the invention includes:
  • a coaxial flat cable including:
  • plural coaxial cables each having a center conductor, an inner insulator formed on an outer circumferential surface of the center conductor, an outer conductor formed on an outer circumferential surface of the inner insulator, and an outer sheath formed on an outer circumferential surface of the outer conductor;
  • connection board connected to at least one end portion, in its longitudinal direction, of the coaxial flat cable, wherein:
  • connection board includes signal terminal members to which the center conductors of the plural coaxial cables are soldered, respectively, and a ground portion to which the outer conductors of the plural coaxial cables are connected electrically;
  • a wiring member according to another aspect of the invention includes:
  • a coaxial flat cable including:
  • plural coaxial cables each having a center conductor, an inner insulator formed on an outer circumferential surface of the center conductor, an outer conductor formed on an outer circumferential surface of the inner insulator, and an outer sheath formed on an outer circumferential surface of the outer conductor;
  • connection board connected to at least one end portion, in its longitudinal direction, of the coaxial flat cable, wherein:
  • connection board includes signal terminal members to which the center conductors of the plural coaxial cables are soldered, respectively, and a ground portion to which the outer conductors of the plural coaxial cables are connected electrically; exposed portions of the center conductors are bent as a whole to the same side from the side of a smaller margin to a larger margin, the margins being located between two side edges of the resin film and two end coaxial cables in an arrangement direction of the plural coaxial cables;
  • connection board an end portion of the resin film is bonded and fixed to the connection board.
  • a manufacturing method of a wiring member according to the invention includes:
  • the invention makes it possible to provide a high-quality wiring member in which the center conductors are positioned accurately with respect to respective terminal members of a board and connected to them reliably, as well as a manufacturing method thereof.
  • FIG. 1 A top view of a wiring member according to an embodiment of the present invention.
  • FIG. 2 A sectional view of a coaxial flat cable of the wiring member shown in Fig. 1.
  • FIG. 3 An enlarged top view of an end portion of the wiring member shown in Fig. 1.
  • FIG. 4 A side sectional view corresponding to Fig. 3.
  • FIG. 5 A schematic diagram showing the configuration of a laminating machine.
  • FIG. 6 A top view of coaxial flat cables in the process of manufacture.
  • FIG. 7 Views illustrating a manufacturing process of a wiring member, (a) to (d) of which are side sectional views of an end portion of a coaxial flat cable and a connection board.
  • FIG. 8 Views illustrating a positioning step, (a) and (b) of which are top views of an end portion of a coaxial flat cable and a connection board.
  • FIG. 9 A perspective view of the center conductors of coaxial cables and a jig.
  • FIG. 10 A side sectional view of a modification.
  • a wiring member according to one aspect of the invention includes:
  • a coaxial flat cable including:
  • plural coaxial cables each having a center conductor, an inner insulator formed on an outer circumferential surface of the center conductor, an outer conductor formed on an outer circumferential surface of the inner insulator, and an outer sheath formed on an outer circumferential surface of the outer conductor; and a resin film which is bonded to the plural coaxial cables from at least one of the two sides of an arrangement plane of the plural coaxial cables to maintain a parallel arrangement of the plural coaxial cables;
  • connection board connected to at least one end portion, in its longitudinal direction, of the coaxial flat cable, wherein:
  • connection board includes signal terminal members to which the center conductors of the plural coaxial cables are soldered, respectively, and a ground portion to which the outer conductors of the plural coaxial cables are connected electrically;
  • the parallel arrangement of the coaxial cables is maintained by the resin film.
  • the coaxial cables can be connected to the connection board so as to be arranged parallel with each other adjacent to the connection board.
  • the exposed portions of the center conductors are soldered to the respective signal terminal members of the connection board by bending them in the arrangement direction of the coaxial cables.
  • the center conductors can be connected to the respective signal terminal members of the connection board so as to be positioned accurately with respect to the latter.
  • a wiring member can become free of a connection failure due to positional deviation between a center conductor and a signal terminal member.
  • (2) Margins may be located between two side edges of the resin film and two end coaxial cables in the arrangement direction of the coaxial cables, and the exposed portions of the center conductors may be bent from the side of a smaller margin to the side of a larger margin.
  • the exposed portions of the center conductors can be connected to the respective signal terminal members by bending the former to the side that is opposite to the side of their deviation.
  • At least exposed portions of the outer conductors and further tip portions of the coaxial cables may be covered with a protective film.
  • the outer conductors and the center conductors are protected by the protective film and hence short-circuiting between conductors and peeling of a tip portion of a coaxial cable can be prevented.
  • An end portion of the resin film may be bonded and fixed to the connection board.
  • the strength of connection between the coaxial flat cable and the connection board can be increased.
  • a wiring member according to another aspect of the invention includes: a coaxial flat cable including:
  • plural coaxial cables each having a center conductor, an inner insulator formed on an outer circumferential surface of the center conductor, an outer conductor formed on an outer circumferential surface of the inner insulator, and an outer sheath formed on an outer circumferential surface of the outer conductor;
  • connection board connected to at least one end portion, in its longitudinal direction, of the coaxial flat cable, wherein:
  • connection board includes signal terminal members to which the center conductors of the plural coaxial cables are soldered, respectively, and a ground portion to which the outer conductors of the plural coaxial cables are connected electrically; exposed portions of the center conductors are bent as a whole to the same side from the side of a smaller margin to a larger margin, the margins being located between two side edges of the resin film and two end coaxial cables in an arrangement direction of the plural coaxial cables;
  • connection board an end portion of the resin film is bonded and fixed to the connection board.
  • the parallel arrangement of the coaxial cables is maintained by the resin film.
  • the coaxial cables can be connected to the connection board so as to be arranged parallel with each other adjacent to the connection board.
  • the exposed portions of the center conductors are soldered to the respective signal terminal members of the connection board by bending them in the arrangement direction of the coaxial cables.
  • the center conductors can be connected to the respective signal terminal members of the connection board so as to be positioned accurately with respect to the latter.
  • a wiring member can become free of a connection failure due to positional deviation between a center conductor and a signal terminal member.
  • the protective film Since at least exposed portions of the outer conductors and further tip portions of the coaxial cables are covered with the protective film, the outer conductors and the center conductors are protected by the protective film and hence short-circuiting between conductors and peeling of a tip portion of a coaxial cable can be prevented.
  • connection board since the end portion of the resin film is bonded and fixed to the connection board, the strength of connection between the coaxial flat cable and the connection board can be increased.
  • a manufacturing method of a wiring member according to the invention includes:
  • the parallel arrangement of the coaxial cables can be maintained by the resin film. Therefore, the coaxial cables can be connected to the connection board so as to be arranged parallel with each other adjacent to the connection board. Furthermore, if the coaxial cables are deviated as a whole in their arrangement direction, the exposed portions of the center conductors are positioned with respect to the respective signal terminal members of the connection board by bending them, together as a whole, to the side that is opposite to the side of their deviation using the jig. With this measure, the center conductors can be connected to the respective signal terminal members of the connection board so as to be positioned accurately with respect to the latter. Thus, a wiring member can become free of a connection failure between a center conductor and a signal terminal member.
  • a protective film applying step of applying a protective film to at least exposed portions of the outer conductors and further tip portions of the coaxial cables may be executed after the conductors connecting step.
  • the manufacturing method of item (7) makes it possible to manufacture a wiring member whose electrical characteristics can be maintained easily because the outer conductors and the center conductors are protected by the protective film.
  • a wiring member 1 according to an embodiment of the invention is used for electrical connection of, for example, a board or a component.
  • the wiring member 1 is suitable for transmission of differential signals.
  • Fig. 1 is a top view of the wiring member 1 according to the embodiment of the invention. As shown in Fig. 1, the wiring member 1 is equipped with a coaxial flat cable 10 extending in the longitudinal direction and connection boards 20 which are disposed adjacent to the two respective ends, in the longitudinal direction, of the coaxial flat cable 10.
  • Fig. 2 is a sectional view of the coaxial flat cable 10 of the wiring member 1 shown in Fig. 1.
  • the coaxial flat cable 10 is equipped with plural coaxial cables 30 and resin films 41 which are applied to the coaxial cables 30.
  • Each coaxial cable 30 is a coaxial cable having an outer diameter 0.16 to 0.3 mm, for example.
  • Each coaxial cable 30 is equipped with a center conductor 31, an inner insulator 32, an outer conductor 33, and an outer sheath 34.
  • the inner insulator 32 is formed on the outer circumferential surface of the center conductor 31.
  • the outer conductor 33 is formed on the outer circumferential surface of the inner insulator 32.
  • the outer sheath 34 is formed on the outer circumferential surface of the outer conductor 33.
  • the center conductor 31 is, for example, a metal wire made of copper, and may be a wire of AWG (American Wire Gauge) #42 to 47.
  • Each of the inner insulator 32 and the outer sheath 34 is made of an insulative resin.
  • the plural coaxial cables 30 are arranged in a plane.
  • the manner of arrangement of the coaxial cables 30 is determined by a wiring design.
  • the coaxial cables 30 are arranged at a prescribed pitch.
  • the resin films 41 are bonded to the coaxial cables 30 from the both sides of their arrangement plane and thereby maintain the parallel arrangement of the coaxial cables 30.
  • each resin film 41 is a polyethylene terephthalate film having a thickness of several micrometers to several tens of micrometers (preferably, 8 to 20 ⁇ ).
  • the resin films 41 are bonded to the outer sheaths 34 of the coaxial cables 30 with adhesive.
  • only one resin film 41 may be bonded to the coaxial cables 30 from one side of their arrangement plane. In the embodiment, it is easy to firmly maintain the arrangement plane of the coaxial cables 30 because the resin films 41 are bonded to the coaxial cables 30 from the two sides of their parallel arrangement.
  • the resin films 41 are bonded to the outer sheaths 34 of the coaxial cables 30 over the entire length of their extension, excepting the center conductor 31, the inner insulator 32 and the outer conductor 33.
  • the parallel arrangement (planar arrangement) of the coaxial cables 30 can be maintained easily in their longitudinal direction because the resin films 41 are bonded to the coaxial cables 30 over the entire length of their extension.
  • Fig. 3 is an enlarged top view of an end portion of the wiring member 1 shown in Fig. 1. As shown in Fig. 3, a connection board 20 is connected to each end portion, in its longitudinal direction, of the coaxial flat cable 10.
  • every layers of the coaxial cables 30 are exposed in sequence. More specifically, a tip portion of the outer conductor 33 is exposed from the outer sheath 34, a tip portion of the inner insulator 32 is exposed from the tip portion of the outer conductor 33, and a tip portion of the center conductor 31 is exposed from the tip portion of the inner insulator 32.
  • each connection board 20 is a flexible board or a hard board having wiring patterns made of metal foil or the like.
  • Each connection board 20 is short in the longitudinal length of the coaxial flat cable 10, and has conductor members as terminal members for connection to another board or the like and connection members for connection to the coaxial flat cable 10.
  • each connection board 20 is provided with signal terminal members 22 and ground terminal members 23 which extend straightly in the longitudinal direction of the coaxial cables 30.
  • Each signal terminal member 22 is electrically connected to the center conductor 31 of the corresponding coaxial cable 30, and the ground terminal members 23 are electrically connected to the outer conductors 33 of the coaxial cables 30.
  • the exposed tip portions of the center conductors 31 of the coaxial cables 30 are soldered to the respective signal terminal members 22 by solder members 61.
  • the ground terminal members 23 extend in the same direction with the signal terminal members 22. End portions, close to the outer sheath 34, of the ground terminal members 23 extend closer to the outer sheath 34 than end portions of the signal terminal members 22. The ends, close to the outer sheath 34, of the ground terminal members 23 are connected to each other by a pad portion (ground portion) 25 which extends in the direction that is perpendicular to the longitudinal direction of the coaxial cables 30.
  • the outer conductors 33 of the coaxial cables 30 are soldered to the pad portion 25 by solder 62, whereby the outer conductors 33 are electrically connected to the ground terminal members 23 via the pad portion 25.
  • the pad portion 25 allows the outer conductors 33 to be easily connected to the ground terminal members 23 electrically.
  • the outer conductors 33 of the parallel-arranged coaxial cables 30 are integrated together by the solder 62 over the entire length of arrangement of the coaxial cables 30, whereby the potentials of the outer conductors 33 of all the coaxial cables 30 can be equalized and hence the ground potential can be made stable.
  • connection position, with respect to the connection board 20, of the coaxial flat cable 10 is determined using, as references, outer edges such as side edges of the resin films 41.
  • the exposed portions of the center conductors 31 are bent in the direction (indicated by arrow B in Fig. 3) that is opposite to the direction in which the axial lines of the coaxial cables 30 are deviated from the respective signal terminal members 22.
  • margins MA and MB are located between the two pairs of side edges of the resin films 41 and the two end coaxial cables 30a and 30b in the arrangement direction of the coaxial cables 30, and the exposed portions of the center conductors 31 are bent in the direction from the side of the smaller margin (MA in Fig. 3) to the side of the larger margin (MB in Fig. 3).
  • the tip portion of the center conductor 31 of each coaxial cable 30 is soldered to the corresponding signal terminal member 22.
  • Fig. 4 is a side sectional view corresponding to Fig. 3 and taken by a plane including the longitudinal direction of the coaxial cables 30, and shows the structure of the end portion and its neighborhood of a coaxial cable 30.
  • an end portion, in its longitudinal direction, of one resin film 41 is bonded to the connection board 20 with adhesive 51. Since the end portion of the one resin film 41 is bonded and thereby fixed to the connection board 20, the strength of connection between the coaxial flat cable 10 and the connection board 20 can be increased.
  • a resin protective film 42 is covered with a resin protective film 42.
  • the protective film 42 is bonded so as to bridge termination-processed end portions of the outer sheaths 34 of the coaxial cables 30 and the connection board 20.
  • the protective film 42 is bonded to the surface, provided with the coaxial cables 30, of the connection board 20.
  • the protective film 42 is bonded to cover the other resin film 41, the sheaths 34, the outer conductors 33, the inner insulators 32, the center conductors 31, and the connection board 20.
  • the portions, exposed from the resin films 41, of the coaxial cables 30 are protected by the protective film 42. Peeling of a center conductor 31 and short-circuiting between conductors can be prevented by the protective film 42.
  • the protective film 42 is employed in the embodiment, it may be omitted.
  • the parallel arrangement of the coaxial cables 30 is maintained by the resin films 41.
  • the coaxial cables 30 can be connected to the connection board 20 so as to be arranged parallel with each other adjacent to the connection board 20.
  • the exposed portions of the center conductors 31 of the coaxial cables 30 are soldered to the respective signal terminal members 22 of the connection board 20 by bending them as a whole in the arrangement direction of the coaxial cables 30. More specifically, the exposed portions of the center conductors 31 are bent in the direction from the side of a smaller one, of the margins MA and MB between the two pairs of side edges of the resin films 41 and the two end coaxial cables 30a and 30b in the arrangement direction of the coaxial cables 30, to the side of a larger margin. With this measure, even if the coaxial cables 30 are deviated as a whole in their arrangement direction, the center conductors 31 can be connected to the respective signal terminal members 22 of the connection board 20 so as to be positioned accurately with respect to the latter. Thus, the wiring member 1 is given so high quality as to be free of such problems as a connection failure.
  • the outer conductors 33 are electrically connected to the pad portion 25 with the solder 62, the outer conductors 33 may be electrically connected to the pad portion 25 by pressing the exposed portions of the outer conductors 33 against the pad portion 25 using a ground bar and thereby fixing them.
  • Fig. 5 is a schematic diagram showing the configuration of a laminating machine.
  • Fig. 6 is a top view of coaxial flat cables 10 in the process of manufacture
  • (a) to (d) of Fig. 7 are side sectional views of an end portion of a coaxial flat cable 10 and a connection board 20 and illustrate a manufacturing process of the wiring member 1.
  • (a) and (b) of Fig. 8 are top views of an end portion of a coaxial flat cable 10 and a connection board 20 and illustrate a positioning step.
  • Fig. 9 is a perspective view of the center conductors 31 of coaxial cables 30 and a jig 91.
  • Resin films 41 each having windows 41a are bonded to the two respective sides of the parallel arrangement of the coaxial cables 30 which are pulled out while being arranged in a plane, while they are pressed against the coaxial cables 30 by a pair of rollers 81. Furthermore, a resulting laminated films are cut in its longitudinal direction by cutters 82 into plural long coaxial flat cable 10a.
  • each end portion, projecting from the ends of the resin film 41, of each coaxial cable 30 of each of the coaxial flat cables 10 is subjected to termination working in which the outer conductor 33, the inner insulator 32, and the center conductor 31 are exposed in order.
  • connection board 20 having the signal terminal members 22 to which the center conductors 31 of the coaxial cables 30 are to be soldered and the pad portion 25 to which the external conductors 33 of the coaxial cables 30 are to be soldered is positioned with respect to an end portion of the coaxial flat cable 10.
  • the connection board 20 is placed at such a position that the outer conductors 33 can come into contact with the pad portion 25.
  • the connection board 20 is placed using the outer edges of the coaxial flat cable 10 and the connection board 20 as references. Where the connection board 20 and an end portion of the one resin film 41 are to be bonded to each other with adhesive 51, they are bonded to each other after a conductors connecting step (described below).
  • the outer conductors 33 are soldered to the pad portion 25. Then, the center conductors 31 are soldered to the respective signal terminal members 22.
  • the soldering is performed by pulse heating method. More specifically, the solder 61 and the solder 62 are melted by instantaneously heating a heater tip H that is pressed against each target joining portion. A solder rod 62 is placed on the tip portions of the outer conductors 33 so as to extend in their arrangement direction, and the solder rod 62 is heated by pressing the heater tip H against it from above.
  • the center conductors 31 are soldered to the respective signal terminal members 22 with the solder 61, and the outer conductors 33 are soldered to the pad portion 25 with the solder 62.
  • the outer conductors 33 of the parallel-arranged coaxial cables 30 are connected to each other in the arrangement direction of the coaxial cables 30, being soldered to each other with the solder 62.
  • Solder 62 is applied, in advance, to the pad portion 25 to which the tip portions of the outer conductors 33 are to be soldered, applying solder 62 to the pad portion 25 in advance allows the tip portions of the outer conductors 33 to be soldered to the pad portion 25 satisfactorily and smoothly.
  • solder 61 may be applied, in advance, to the signal terminal members 22 to which the center conductors 31 are to be soldered.
  • the width dimension of the coaxial flat cable 10 in which the resin films 41 are laminated on the coaxial cables 30 over the entire length of extension of the coaxial cables 30 is equal to that of the resin films 41.
  • the resin films 41 are given the prescribed width dimension by cutting both side portions of each resin film in the laminating step. There may occur an event that the coaxial cables 30 which are arranged parallel with each other are deviated as a whole in their arrangement direction relative to the resin films 41 that are given the prescribed width dimension in the above manner. This is caused by swing of the cutters 82, lateral deviation of resin films 41, or lateral movement of the coaxial cables 30 being pulled out that occurs during cutting of resin films 41 in the laminating step. Almost no deviation occurs in the pitch between the coaxial cables 30.
  • the tip portions of the center conductors 31 of the coaxial cables 30 are deviated as a whole from the respective signal terminal members 22 of the connection board 20 in the arrangement direction of the coaxial cables 30.
  • the margin MA between a coaxial cable 30a and the corresponding side edges of the resin films 41 is smaller than the margin MB between a coaxial cable 30b and the corresponding side edges of the resin films 41.
  • the center conductors 31 are positioned using a jig 91 after the connection of the outer conductors 33 to the pad portion 25 in the conductors connecting step.
  • the jig 91 has plural engagement grooves 92 whose width is a little greater than the outer diameter of the center conductors 31 of the coaxial cables 30.
  • the engagement grooves 92 are formed so as to have the same pitch as the arrangement pitch of the coaxial cables 30 of the coaxial flat cable 10.
  • the jig 91 is placed on the connection board 20 so that the tip portions (positioned (temporarily) with respect to the connection board 20) of the center conductors 31 of the coaxial cable 30 are inserted into the respective engagement grooves 92. Then the jig 91 is moved by a distance that is equal to the deviation value (MB - MA)/2 of the center conductors 31 from the respective signal terminal members 22 to the side (indicated by arrow B in Fig. 9) that is opposite to the side to which the tip portions of the center conductors 31 are deviated from the respective signal terminal members 22, in the arrangement direction of the coaxial cables 30.
  • the exposed portions of the center conductors 31 are bent together as a whole in the other direction (indicated by arrow B in Fig. 8(b)) in the arrangement direction of the coaxial cables 30. More specifically, the exposed portions of the center conductors 31 are bent in the direction from the side of the smaller one (MA) of the margins MA and MB between the two pairs of side edges of the resin films 41 and the two end coaxial cables 30a and 30b in the arrangement direction of the coaxial cables 30 to the side of the larger margin (MB). As a result, the tip portions of the center conductors 31 are finally positioned so as to be placed on or over the respective signal terminal members 22.
  • MA the smaller one
  • each center conductor 31 is soldered and connected to the corresponding signal terminal member 22 with solder 61 in the state that each center conductor 31 is positioned with respect to the corresponding signal terminal member 22.
  • a protective film 42 is applied to a resulting structure so as to cover each end portion of the other resin film 41, the tip portions, exposed from the resin films 41, of the outer conductors 33, the inner insulators 32, and the center conductors 31 of the respective coaxial cables 30, and a portion of the connection board 20.
  • the exposed portions of the outer conductors 33 and the exposed portions of the other members of the coaxial cables 30 located on the tip side of the exposed portions of the outer conductors 33 are covered with the resin protective film 42, whereby the portions, exposed from the resin films 41, of the members of the coaxial cables 30 are protected (see Fig. 4).
  • a high-quality wiring member 1 can be manufactured in which the center conductors 31 are positioned accurately to the respective signal terminal members 22 of the connection board 20 and connected to them reliably.
  • the invention is not limited to such a case.
  • tip portions of the outer sheaths 34 may be exposed from both ends of the resin films 41 in their longitudinal direction and bonded to the connection board 20 with adhesive 51.
  • the distance between the center conductor 31 of each coaxial cable 30 and the surface of the connection board 20 is short and hence each center conductor 31 can be soldered to the corresponding signal terminal member 22 with less bending of the coaxial cable 30.
  • a resin reinforcement film 43 may be bonded so as to bridge the one resin film 41 and the connection board 20.
  • the reinforcement film 43 is bonded to the surface, opposite to the surface that is provided with the coaxial cables 30, of the connection board 20.
  • the reinforcement film 43 can increase the strength of the portion where the coaxial flat cable 10 and the connection board 20 are connected to each other.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Insulated Conductors (AREA)
  • Multi-Conductor Connections (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Communication Cables (AREA)

Abstract

A high-quality wiring member in which center conductors (31) are positioned accurately with respect to respective terminal members (22) of a board (20) and connected to them reliably, and a manufacturing method thereof. In an end portion of each of coaxial cables (30) connected to a connection board (20), an outer conductor (33), an inner insulator (32), and a center conductor (31) are exposed in sequence. The connection board (20) has signal terminal members (22) to which the center conductors (31) of the coaxial cables (30) are soldered, respectively, and a pad portion (25) to which the outer conductors (33) of the coaxial cables (30) are connected electrically. Exposed portions of the center conductors (31) are bent to the same side as a whole in the arrangement direction of the coaxial cables (30).

Description

WIRING MEMBER AND MANUFACTURING METHOD THEREOF
[Technical Field]
[0001]
The present invention relates to a wiring member having a coaxial flat cable and a manufacturing method thereof.
[Background Art]
[0002]
Coaxial cable harnesses having plural coaxial cables are known as cables for connection between apparatus or inside an apparatus (refer to Patent document 1).
[Prior Art Documents]
[Patent documents]
[0003]
[Patent document 1] JP-2011-096403 A
[Summary of the Invention]
[Problems to be solved by the invention]
[0004]
In the coaxial cable harness of Patent document 1, plural coaxial cables are bundled together at a middle position. However, the coaxial cable harness whose coaxial cables are bundled together at a middle position to form a round portion there does not satisfy a demand that the harness should be thin and flat in its entirety. In a configuration in which the coaxial cables arranged parallel with each other by applying a resin film(s) to them to make the entire harness thin and flat, when the coaxial cables of a resulting coaxial flat cable are soldered to a board while placing the lateral edge of the flat cable on the specified position of the board, the center conductors of the coaxial cables may not be placed accurately on or over terminal members of the board to cause a contact failure between a center conductor and a terminal member of the board.
[0005]
An object of the present invention is to provide a high-quality wiring member in which the center conductors are positioned accurately with respect to respective terminal members of a board and connected to them reliably, as well as a manufacturing method thereof.
[Means for solving the problems]
[0006]
A wiring member according to one aspect of the invention includes:
a coaxial flat cable including:
plural coaxial cables each having a center conductor, an inner insulator formed on an outer circumferential surface of the center conductor, an outer conductor formed on an outer circumferential surface of the inner insulator, and an outer sheath formed on an outer circumferential surface of the outer conductor; and
a resin film which is bonded to the plural coaxial cables from at least one of the two sides of an arrangement plane of the plural coaxial cables to maintain a parallel arrangement of the plural coaxial cables; and
a connection board connected to at least one end portion, in its longitudinal direction, of the coaxial flat cable, wherein:
in an end portion of each of the plural coaxial cables connected to the connection board, the outer conductor, the inner insulator, and the center conductor are exposed in sequence;
the connection board includes signal terminal members to which the center conductors of the plural coaxial cables are soldered, respectively, and a ground portion to which the outer conductors of the plural coaxial cables are connected electrically; and
exposed portions of the center conductors are bent as a whole to the same side in an arrangement direction of the coaxial cables.
[0007]
A wiring member according to another aspect of the invention includes:
a coaxial flat cable including:
plural coaxial cables each having a center conductor, an inner insulator formed on an outer circumferential surface of the center conductor, an outer conductor formed on an outer circumferential surface of the inner insulator, and an outer sheath formed on an outer circumferential surface of the outer conductor; and
a resin film which is bonded to the plural coaxial cables from at least one of the two sides of an arrangement plane of the plural coaxial cables to maintain a parallel arrangement of the plural coaxial cables; and
a connection board connected to at least one end portion, in its longitudinal direction, of the coaxial flat cable, wherein:
in an end portion of each of the plural coaxial cables connected to the connection board, the outer conductor, the inner insulator, and the center conductor are exposed in sequence; the connection board includes signal terminal members to which the center conductors of the plural coaxial cables are soldered, respectively, and a ground portion to which the outer conductors of the plural coaxial cables are connected electrically; exposed portions of the center conductors are bent as a whole to the same side from the side of a smaller margin to a larger margin, the margins being located between two side edges of the resin film and two end coaxial cables in an arrangement direction of the plural coaxial cables;
at least exposed portions of the outer conductors and further tip portions of the coaxial cables are covered with a protective film.; and
an end portion of the resin film is bonded and fixed to the connection board.
[0008]
A manufacturing method of a wiring member according to the invention includes:
an arranging step of arranging, in a plane, plural coaxial cables each having a center conductor, an inner insulator formed on an outer circumferential surface of the center conductor, an outer conductor formed on an outer circumferential surface of the inner insulator, and an outer sheath formed on an outer circumferential surface of the outer conductor;
a laminating step of bonding a resin film to the plural coaxial cables from at least one of the two sides of an arrangement plane of the plural coaxial cables to produce a coaxial flat cable in which a parallel arrangement of the plural coaxial cables is maintained;
a termination working step of performing termination working of exposing the outer conductor, the inner insulator, and the center conductor in sequence in an end portion of each of the plural coaxial cables; a positioning step of positioning an end portion of the coaxial flat cable with respect to the connection board; and
a conductors connecting step of connecting the outer conductors to a ground portion of the connection board, and then soldering the center conductors to respective signal terminal members of the connection board,
wherein in the conductors connecting step, after connecting the outer conductors to the ground portion, causing a jig to grip exposed portions of all of the center conductors deviated from the respective signal terminal members in an arrangement direction of the plural coaxial cables and moving the jig to a side that is opposite to the side of the deviation of the center conductors, to thereby bend the exposed portions, held by the jig, of the center conductors as a whole to the same side in the arrangement direction of the plural coaxial cables and to position the exposed portions of the center conductors finally so that they are placed on or over the respective signal terminal members.
[Advantages of the invention]
[0009]
The invention makes it possible to provide a high-quality wiring member in which the center conductors are positioned accurately with respect to respective terminal members of a board and connected to them reliably, as well as a manufacturing method thereof.
[Brief Description of the Drawings]
[0010]
[Fig. 1] A top view of a wiring member according to an embodiment of the present invention. [Fig. 2] A sectional view of a coaxial flat cable of the wiring member shown in Fig. 1.
[Fig. 3] An enlarged top view of an end portion of the wiring member shown in Fig. 1.
[Fig. 4] A side sectional view corresponding to Fig. 3.
[Fig. 5] A schematic diagram showing the configuration of a laminating machine. [Fig. 6] A top view of coaxial flat cables in the process of manufacture.
[Fig. 7] Views illustrating a manufacturing process of a wiring member, (a) to (d) of which are side sectional views of an end portion of a coaxial flat cable and a connection board.
[Fig. 8] Views illustrating a positioning step, (a) and (b) of which are top views of an end portion of a coaxial flat cable and a connection board.
[Fig. 9] A perspective view of the center conductors of coaxial cables and a jig.
[Fig. 10] A side sectional view of a modification.
[Modes for Carrying Out the Invention]
[0011]
<Outline of embodiments of invention>
First, embodiments of the present invention will be outlined below.
(1) A wiring member according to one aspect of the invention includes:
a coaxial flat cable including:
plural coaxial cables each having a center conductor, an inner insulator formed on an outer circumferential surface of the center conductor, an outer conductor formed on an outer circumferential surface of the inner insulator, and an outer sheath formed on an outer circumferential surface of the outer conductor; and a resin film which is bonded to the plural coaxial cables from at least one of the two sides of an arrangement plane of the plural coaxial cables to maintain a parallel arrangement of the plural coaxial cables; and
a connection board connected to at least one end portion, in its longitudinal direction, of the coaxial flat cable, wherein:
in an end portion of each of the plural coaxial cables connected to the connection board, the outer conductor, the inner insulator, and the center conductor are exposed in sequence;
the connection board includes signal terminal members to which the center conductors of the plural coaxial cables are soldered, respectively, and a ground portion to which the outer conductors of the plural coaxial cables are connected electrically; and
exposed portions of the center conductors are bent to as a whole to the same side in an arrangement direction of the coaxial cables.
In the configuration of item (1), the parallel arrangement of the coaxial cables is maintained by the resin film. With this measure, the coaxial cables can be connected to the connection board so as to be arranged parallel with each other adjacent to the connection board. Furthermore, the exposed portions of the center conductors are soldered to the respective signal terminal members of the connection board by bending them in the arrangement direction of the coaxial cables. With this measure, even if the coaxial cables are deviated as a whole in their arrangement direction, the center conductors can be connected to the respective signal terminal members of the connection board so as to be positioned accurately with respect to the latter. Thus, a wiring member can become free of a connection failure due to positional deviation between a center conductor and a signal terminal member. [0012]
(2) Margins may be located between two side edges of the resin film and two end coaxial cables in the arrangement direction of the coaxial cables, and the exposed portions of the center conductors may be bent from the side of a smaller margin to the side of a larger margin.
According to the configuration of item (2), when the coaxial flat cable has been positioned with respect to the connection board using their outer edges as references, the exposed portions of the center conductors can be connected to the respective signal terminal members by bending the former to the side that is opposite to the side of their deviation.
[0013]
(3) At least exposed portions of the outer conductors and further tip portions of the coaxial cables may be covered with a protective film.
According to the configuration of item (3), the outer conductors and the center conductors are protected by the protective film and hence short-circuiting between conductors and peeling of a tip portion of a coaxial cable can be prevented.
[0014]
(4) An end portion of the resin film may be bonded and fixed to the connection board.
According to the configuration of item (4), the strength of connection between the coaxial flat cable and the connection board can be increased.
[0015]
(5) A wiring member according to another aspect of the invention includes: a coaxial flat cable including:
plural coaxial cables each having a center conductor, an inner insulator formed on an outer circumferential surface of the center conductor, an outer conductor formed on an outer circumferential surface of the inner insulator, and an outer sheath formed on an outer circumferential surface of the outer conductor; and
a resin film which is bonded to the plural coaxial cables from at least one of the two sides of an arrangement plane of the plural coaxial cables to maintain a parallel arrangement of the plural coaxial cables; and
a connection board connected to at least one end portion, in its longitudinal direction, of the coaxial flat cable, wherein:
in an end portion of each of the plural coaxial cables connected to the connection board, the outer conductor, the inner insulator, and the center conductor are exposed in sequence;
the connection board includes signal terminal members to which the center conductors of the plural coaxial cables are soldered, respectively, and a ground portion to which the outer conductors of the plural coaxial cables are connected electrically; exposed portions of the center conductors are bent as a whole to the same side from the side of a smaller margin to a larger margin, the margins being located between two side edges of the resin film and two end coaxial cables in an arrangement direction of the plural coaxial cables;
at least exposed portions of the outer conductors and further tip portions of the coaxial cables are covered with a protective film; and
an end portion of the resin film is bonded and fixed to the connection board.
In the configuration of item (5), the parallel arrangement of the coaxial cables is maintained by the resin film. With this measure, the coaxial cables can be connected to the connection board so as to be arranged parallel with each other adjacent to the connection board. Furthermore, the exposed portions of the center conductors are soldered to the respective signal terminal members of the connection board by bending them in the arrangement direction of the coaxial cables. With this measure, even if the coaxial cables are deviated as a whole in their arrangement direction, the center conductors can be connected to the respective signal terminal members of the connection board so as to be positioned accurately with respect to the latter. Thus, a wiring member can become free of a connection failure due to positional deviation between a center conductor and a signal terminal member.
Since at least exposed portions of the outer conductors and further tip portions of the coaxial cables are covered with the protective film, the outer conductors and the center conductors are protected by the protective film and hence short-circuiting between conductors and peeling of a tip portion of a coaxial cable can be prevented.
Furthermore, since the end portion of the resin film is bonded and fixed to the connection board, the strength of connection between the coaxial flat cable and the connection board can be increased.
[0016]
(6) A manufacturing method of a wiring member according to the invention includes:
an arranging step of arranging, in a plane, plural coaxial cables each having a center conductor, an inner insulator formed on an outer circumferential surface of the center conductor, an outer conductor formed on an outer circumferential surface of the inner insulator, and an outer sheath formed on an outer circumferential surface of the outer conductor;
a laminating step of bonding a resin film to the plural coaxial cables from at least one of the two sides of an arrangement plane of the plural coaxial cables to produce a coaxial flat cable in which a parallel arrangement of the plural coaxial cables is maintained;
a termination working step of performing termination working of exposing the outer conductor, the inner insulator, and the center conductor in sequence in an end portion of each of the plural coaxial cables;
a positioning step of positioning an end portion of the coaxial flat cable with respect to the connection board; and
a conductors connecting step of connecting the outer conductors to a ground portion of the connection board, and then soldering the center conductors to respective signal terminal members of the connection board,
wherein in the conductors connecting step, after connecting the outer conductors to the ground portion, causing a jig to grip exposed portions of all of the center conductors deviated from the respective signal terminal members in an arrangement direction of the plural coaxial cables and moving the jig to a side that is opposite to the side of the deviation of the center conductors, to thereby bend the exposed portions, held by the jig, of the center conductors as a whole to the same side in the arrangement direction of the plural coaxial cables and to position the exposed portions of the center conductors finally so that they are placed on or over the respective signal terminal members.
In the manufacturing method of item (6), the parallel arrangement of the coaxial cables can be maintained by the resin film. Therefore, the coaxial cables can be connected to the connection board so as to be arranged parallel with each other adjacent to the connection board. Furthermore, if the coaxial cables are deviated as a whole in their arrangement direction, the exposed portions of the center conductors are positioned with respect to the respective signal terminal members of the connection board by bending them, together as a whole, to the side that is opposite to the side of their deviation using the jig. With this measure, the center conductors can be connected to the respective signal terminal members of the connection board so as to be positioned accurately with respect to the latter. Thus, a wiring member can become free of a connection failure between a center conductor and a signal terminal member.
[0017]
(7) A protective film applying step of applying a protective film to at least exposed portions of the outer conductors and further tip portions of the coaxial cables may be executed after the conductors connecting step.
The manufacturing method of item (7) makes it possible to manufacture a wiring member whose electrical characteristics can be maintained easily because the outer conductors and the center conductors are protected by the protective film.
[0018]
<Details of embodiments of invention>
A wiring member and a manufacturing method thereofs according to embodiments of the invention will be hereinafter described with reference to the drawings. However, the invention is not limited to these embodiments but encompasses any modifications that are made within the scope of the claims and equivalents thereof.
[0019]
A wiring member 1 according to an embodiment of the invention is used for electrical connection of, for example, a board or a component. The wiring member 1 is suitable for transmission of differential signals.
[0020]
Fig. 1 is a top view of the wiring member 1 according to the embodiment of the invention. As shown in Fig. 1, the wiring member 1 is equipped with a coaxial flat cable 10 extending in the longitudinal direction and connection boards 20 which are disposed adjacent to the two respective ends, in the longitudinal direction, of the coaxial flat cable 10.
[0021]
Fig. 2 is a sectional view of the coaxial flat cable 10 of the wiring member 1 shown in Fig. 1. As shown in Fig. 2, the coaxial flat cable 10 is equipped with plural coaxial cables 30 and resin films 41 which are applied to the coaxial cables 30. Each coaxial cable 30 is a coaxial cable having an outer diameter 0.16 to 0.3 mm, for example.
[0022]
Each coaxial cable 30 is equipped with a center conductor 31, an inner insulator 32, an outer conductor 33, and an outer sheath 34. The inner insulator 32 is formed on the outer circumferential surface of the center conductor 31. The outer conductor 33 is formed on the outer circumferential surface of the inner insulator 32. The outer sheath 34 is formed on the outer circumferential surface of the outer conductor 33. The center conductor 31 is, for example, a metal wire made of copper, and may be a wire of AWG (American Wire Gauge) #42 to 47. Each of the inner insulator 32 and the outer sheath 34 is made of an insulative resin.
[0023]
The plural coaxial cables 30 are arranged in a plane. The manner of arrangement of the coaxial cables 30 is determined by a wiring design. In the embodiment, the coaxial cables 30 are arranged at a prescribed pitch. The resin films 41 are bonded to the coaxial cables 30 from the both sides of their arrangement plane and thereby maintain the parallel arrangement of the coaxial cables 30. For example, each resin film 41 is a polyethylene terephthalate film having a thickness of several micrometers to several tens of micrometers (preferably, 8 to 20 μπι). The resin films 41 are bonded to the outer sheaths 34 of the coaxial cables 30 with adhesive. Alternatively, only one resin film 41 may be bonded to the coaxial cables 30 from one side of their arrangement plane. In the embodiment, it is easy to firmly maintain the arrangement plane of the coaxial cables 30 because the resin films 41 are bonded to the coaxial cables 30 from the two sides of their parallel arrangement.
[0024]
In the coaxial flat cable 10, the resin films 41 are bonded to the outer sheaths 34 of the coaxial cables 30 over the entire length of their extension, excepting the center conductor 31, the inner insulator 32 and the outer conductor 33. The parallel arrangement (planar arrangement) of the coaxial cables 30 can be maintained easily in their longitudinal direction because the resin films 41 are bonded to the coaxial cables 30 over the entire length of their extension.
[0025]
Fig. 3 is an enlarged top view of an end portion of the wiring member 1 shown in Fig. 1. As shown in Fig. 3, a connection board 20 is connected to each end portion, in its longitudinal direction, of the coaxial flat cable 10.
[0026]
In each end portion of the coaxial flat cable 10, every layers of the coaxial cables 30 are exposed in sequence. More specifically, a tip portion of the outer conductor 33 is exposed from the outer sheath 34, a tip portion of the inner insulator 32 is exposed from the tip portion of the outer conductor 33, and a tip portion of the center conductor 31 is exposed from the tip portion of the inner insulator 32.
[0027] For example, each connection board 20 is a flexible board or a hard board having wiring patterns made of metal foil or the like. Each connection board 20 is short in the longitudinal length of the coaxial flat cable 10, and has conductor members as terminal members for connection to another board or the like and connection members for connection to the coaxial flat cable 10.
That is, each connection board 20 is provided with signal terminal members 22 and ground terminal members 23 which extend straightly in the longitudinal direction of the coaxial cables 30. Each signal terminal member 22 is electrically connected to the center conductor 31 of the corresponding coaxial cable 30, and the ground terminal members 23 are electrically connected to the outer conductors 33 of the coaxial cables 30.
[0028]
The exposed tip portions of the center conductors 31 of the coaxial cables 30 are soldered to the respective signal terminal members 22 by solder members 61.
[0029]
The ground terminal members 23 extend in the same direction with the signal terminal members 22. End portions, close to the outer sheath 34, of the ground terminal members 23 extend closer to the outer sheath 34 than end portions of the signal terminal members 22. The ends, close to the outer sheath 34, of the ground terminal members 23 are connected to each other by a pad portion (ground portion) 25 which extends in the direction that is perpendicular to the longitudinal direction of the coaxial cables 30.
[0030]
The outer conductors 33 of the coaxial cables 30 are soldered to the pad portion 25 by solder 62, whereby the outer conductors 33 are electrically connected to the ground terminal members 23 via the pad portion 25. The pad portion 25 allows the outer conductors 33 to be easily connected to the ground terminal members 23 electrically. The outer conductors 33 of the parallel-arranged coaxial cables 30 are integrated together by the solder 62 over the entire length of arrangement of the coaxial cables 30, whereby the potentials of the outer conductors 33 of all the coaxial cables 30 can be equalized and hence the ground potential can be made stable.
[0031]
On the other hand, in a positioning step of a manufacturing process (described later), a connection position, with respect to the connection board 20, of the coaxial flat cable 10 is determined using, as references, outer edges such as side edges of the resin films 41.
[0032]
Therefore, if the coaxial cables 30 are deviated from the resin films 41 in their arrangement direction, when coaxial flat cable 10 is positioned with respect to the connection board 20 the exposed portions of the center conductors 31 of the coaxial cables 30 are deviated as a whole from the respective signal terminal members 22 of the connection board 20 in the arrangement direction of the coaxial cables 30.
[0033]
In view of the above, in the embodiment, if the axial lines of the coaxial cables 30 are deviated from the respective signal terminal members 22 in one direction (indicated by arrow A in Fig. 3) in the arrangement direction of the coaxial cables 30, the exposed portions of the center conductors 31 are bent in the direction (indicated by arrow B in Fig. 3) that is opposite to the direction in which the axial lines of the coaxial cables 30 are deviated from the respective signal terminal members 22. That is, margins MA and MB are located between the two pairs of side edges of the resin films 41 and the two end coaxial cables 30a and 30b in the arrangement direction of the coaxial cables 30, and the exposed portions of the center conductors 31 are bent in the direction from the side of the smaller margin (MA in Fig. 3) to the side of the larger margin (MB in Fig. 3). As a result, the tip portion of the center conductor 31 of each coaxial cable 30 is soldered to the corresponding signal terminal member 22.
[0034]
Fig. 4 is a side sectional view corresponding to Fig. 3 and taken by a plane including the longitudinal direction of the coaxial cables 30, and shows the structure of the end portion and its neighborhood of a coaxial cable 30. As shown in Fig. 4, an end portion, in its longitudinal direction, of one resin film 41 is bonded to the connection board 20 with adhesive 51. Since the end portion of the one resin film 41 is bonded and thereby fixed to the connection board 20, the strength of connection between the coaxial flat cable 10 and the connection board 20 can be increased.
[0035]
At least the exposed portions of the outer conductors 33 and the further tip portions of the coaxial cables 30 are covered with a resin protective film 42. The protective film 42 is bonded so as to bridge termination-processed end portions of the outer sheaths 34 of the coaxial cables 30 and the connection board 20. The protective film 42 is bonded to the surface, provided with the coaxial cables 30, of the connection board 20. In the embodiment, the protective film 42 is bonded to cover the other resin film 41, the sheaths 34, the outer conductors 33, the inner insulators 32, the center conductors 31, and the connection board 20. The portions, exposed from the resin films 41, of the coaxial cables 30 are protected by the protective film 42. Peeling of a center conductor 31 and short-circuiting between conductors can be prevented by the protective film 42. Although the protective film 42 is employed in the embodiment, it may be omitted.
[0036]
In the wiring member 1 according to the embodiment, the parallel arrangement of the coaxial cables 30 is maintained by the resin films 41. As a result, the coaxial cables 30 can be connected to the connection board 20 so as to be arranged parallel with each other adjacent to the connection board 20.
Furthermore, the exposed portions of the center conductors 31 of the coaxial cables 30 are soldered to the respective signal terminal members 22 of the connection board 20 by bending them as a whole in the arrangement direction of the coaxial cables 30. More specifically, the exposed portions of the center conductors 31 are bent in the direction from the side of a smaller one, of the margins MA and MB between the two pairs of side edges of the resin films 41 and the two end coaxial cables 30a and 30b in the arrangement direction of the coaxial cables 30, to the side of a larger margin. With this measure, even if the coaxial cables 30 are deviated as a whole in their arrangement direction, the center conductors 31 can be connected to the respective signal terminal members 22 of the connection board 20 so as to be positioned accurately with respect to the latter. Thus, the wiring member 1 is given so high quality as to be free of such problems as a connection failure.
[0037]
Although in the embodiment the outer conductors 33 are electrically connected to the pad portion 25 with the solder 62, the outer conductors 33 may be electrically connected to the pad portion 25 by pressing the exposed portions of the outer conductors 33 against the pad portion 25 using a ground bar and thereby fixing them.
[0038] Next, individual steps of a manufacturing method of the above-described wiring member 1 will be described one by one.
Fig. 5 is a schematic diagram showing the configuration of a laminating machine. Fig. 6 is a top view of coaxial flat cables 10 in the process of manufacture, (a) to (d) of Fig. 7 are side sectional views of an end portion of a coaxial flat cable 10 and a connection board 20 and illustrate a manufacturing process of the wiring member 1. (a) and (b) of Fig. 8 are top views of an end portion of a coaxial flat cable 10 and a connection board 20 and illustrate a positioning step. Fig. 9 is a perspective view of the center conductors 31 of coaxial cables 30 and a jig 91.
[0039]
(Arranging step)
As shown in Fig. 5, plural coaxial cables 30 are pulled out being arranged in a plane.
[0040]
(Laminating step)
Resin films 41 each having windows 41a are bonded to the two respective sides of the parallel arrangement of the coaxial cables 30 which are pulled out while being arranged in a plane, while they are pressed against the coaxial cables 30 by a pair of rollers 81. Furthermore, a resulting laminated films are cut in its longitudinal direction by cutters 82 into plural long coaxial flat cable 10a.
[0041]
Subsequently, as shown in Fig. 6, unnecessary side portions of the resin films 41 of each long coaxial flat cable 10a are cut away to obtain a long coaxial flat cable 10a having a prescribed width. Furthermore, the thus-obtained long coaxial flat cable 10a is cut in its width direction at the centers, in its longitudinal direction, of the respective windows 41a. As a result, coaxial flat cables 10 are obtained in each of which plural coaxial cables 30 are arranged at a prescribed pitch and kept parallel with each other by the resin films 41.
[0042]
(Termination working step)
As shown in Fig. 7(a), each end portion, projecting from the ends of the resin film 41, of each coaxial cable 30 of each of the coaxial flat cables 10 is subjected to termination working in which the outer conductor 33, the inner insulator 32, and the center conductor 31 are exposed in order.
[0043]
(Positioning step)
As shown in Fig. 7(b), the connection board 20 having the signal terminal members 22 to which the center conductors 31 of the coaxial cables 30 are to be soldered and the pad portion 25 to which the external conductors 33 of the coaxial cables 30 are to be soldered is positioned with respect to an end portion of the coaxial flat cable 10. In the length direction, the connection board 20 is placed at such a position that the outer conductors 33 can come into contact with the pad portion 25. In the width direction, the connection board 20 is placed using the outer edges of the coaxial flat cable 10 and the connection board 20 as references. Where the connection board 20 and an end portion of the one resin film 41 are to be bonded to each other with adhesive 51, they are bonded to each other after a conductors connecting step (described below).
[0044]
(Conductors connecting step)
As shown in Fig. 7(c), the outer conductors 33 are soldered to the pad portion 25. Then, the center conductors 31 are soldered to the respective signal terminal members 22. The soldering is performed by pulse heating method. More specifically, the solder 61 and the solder 62 are melted by instantaneously heating a heater tip H that is pressed against each target joining portion. A solder rod 62 is placed on the tip portions of the outer conductors 33 so as to extend in their arrangement direction, and the solder rod 62 is heated by pressing the heater tip H against it from above.
[0045]
As a result, as shown in Fig. 7(d), the center conductors 31 are soldered to the respective signal terminal members 22 with the solder 61, and the outer conductors 33 are soldered to the pad portion 25 with the solder 62. The outer conductors 33 of the parallel-arranged coaxial cables 30 are connected to each other in the arrangement direction of the coaxial cables 30, being soldered to each other with the solder 62.
[0046]
Solder 62 is applied, in advance, to the pad portion 25 to which the tip portions of the outer conductors 33 are to be soldered, applying solder 62 to the pad portion 25 in advance allows the tip portions of the outer conductors 33 to be soldered to the pad portion 25 satisfactorily and smoothly. Likewise, solder 61 may be applied, in advance, to the signal terminal members 22 to which the center conductors 31 are to be soldered.
[0047]
Incidentally, the width dimension of the coaxial flat cable 10 in which the resin films 41 are laminated on the coaxial cables 30 over the entire length of extension of the coaxial cables 30 is equal to that of the resin films 41. The resin films 41 are given the prescribed width dimension by cutting both side portions of each resin film in the laminating step. There may occur an event that the coaxial cables 30 which are arranged parallel with each other are deviated as a whole in their arrangement direction relative to the resin films 41 that are given the prescribed width dimension in the above manner. This is caused by swing of the cutters 82, lateral deviation of resin films 41, or lateral movement of the coaxial cables 30 being pulled out that occurs during cutting of resin films 41 in the laminating step. Almost no deviation occurs in the pitch between the coaxial cables 30.
[0048]
If the positions of the coaxial cables 30 with respect to the resin films 41 are deviated in their arrangement direction, the tip portions of the center conductors 31 of the coaxial cables 30 are deviated as a whole from the respective signal terminal members 22 of the connection board 20 in the arrangement direction of the coaxial cables 30.
[0049]
For example, if as shown in Fig. 8(a) the positions of the coaxial cables 30 with respect to the resin films 41 are deviated to one side (indicated by arrow A) in their arrangement direction, the margin MA between a coaxial cable 30a and the corresponding side edges of the resin films 41 is smaller than the margin MB between a coaxial cable 30b and the corresponding side edges of the resin films 41.
[0050]
In the embodiment, as shown in Fig. 9, the center conductors 31 are positioned using a jig 91 after the connection of the outer conductors 33 to the pad portion 25 in the conductors connecting step. The jig 91 has plural engagement grooves 92 whose width is a little greater than the outer diameter of the center conductors 31 of the coaxial cables 30. Thus, the tip portions of the center conductors 31 can be inserted into the respective engagement grooves 92. The engagement grooves 92 are formed so as to have the same pitch as the arrangement pitch of the coaxial cables 30 of the coaxial flat cable 10.
[0051]
To finally position the tip portions of the center conductors 31 using the jig 91, first, the jig 91 is placed on the connection board 20 so that the tip portions (positioned (temporarily) with respect to the connection board 20) of the center conductors 31 of the coaxial cable 30 are inserted into the respective engagement grooves 92. Then the jig 91 is moved by a distance that is equal to the deviation value (MB - MA)/2 of the center conductors 31 from the respective signal terminal members 22 to the side (indicated by arrow B in Fig. 9) that is opposite to the side to which the tip portions of the center conductors 31 are deviated from the respective signal terminal members 22, in the arrangement direction of the coaxial cables 30. As a result, as shown in Fig. 8(b), the exposed portions of the center conductors 31 are bent together as a whole in the other direction (indicated by arrow B in Fig. 8(b)) in the arrangement direction of the coaxial cables 30. More specifically, the exposed portions of the center conductors 31 are bent in the direction from the side of the smaller one (MA) of the margins MA and MB between the two pairs of side edges of the resin films 41 and the two end coaxial cables 30a and 30b in the arrangement direction of the coaxial cables 30 to the side of the larger margin (MB). As a result, the tip portions of the center conductors 31 are finally positioned so as to be placed on or over the respective signal terminal members 22. Then the jig 91 is moved away from above the connection board 20. Subsequently, each center conductor 31 is soldered and connected to the corresponding signal terminal member 22 with solder 61 in the state that each center conductor 31 is positioned with respect to the corresponding signal terminal member 22.
[0052]
(Protective film applying step)
A protective film 42 is applied to a resulting structure so as to cover each end portion of the other resin film 41, the tip portions, exposed from the resin films 41, of the outer conductors 33, the inner insulators 32, and the center conductors 31 of the respective coaxial cables 30, and a portion of the connection board 20. As a result, the exposed portions of the outer conductors 33 and the exposed portions of the other members of the coaxial cables 30 located on the tip side of the exposed portions of the outer conductors 33 are covered with the resin protective film 42, whereby the portions, exposed from the resin films 41, of the members of the coaxial cables 30 are protected (see Fig. 4).
[0053]
With the above process, a high-quality wiring member 1 can be manufactured in which the center conductors 31 are positioned accurately to the respective signal terminal members 22 of the connection board 20 and connected to them reliably.
[0054]
The invention is not limited to the above embodiments, and various modifications, improvements, etc. can be made at will. The material, shape, dimensions, related numerical values, form of implementation, number (where plural ones are provided), location, etc. of each constituent element of each embodiment are optional and are not restricted as long as the invention can be implemented.
[0055]
For example, although in the above embodiment the end portion, in its longitudinal direction, of the one resin film 41 is bonded to the connection board 20 with the adhesive 51 (see Fig. 4), the invention is not limited to such a case. As shown in Fig. 10, tip portions of the outer sheaths 34 may be exposed from both ends of the resin films 41 in their longitudinal direction and bonded to the connection board 20 with adhesive 51. In this configuration, since the exposed tip portions of the outer sheaths 34 are directly bonded to the connection board 20, the distance between the center conductor 31 of each coaxial cable 30 and the surface of the connection board 20 is short and hence each center conductor 31 can be soldered to the corresponding signal terminal member 22 with less bending of the coaxial cable 30.
[0056]
As shown in Fig. 10, a resin reinforcement film 43 may be bonded so as to bridge the one resin film 41 and the connection board 20. The reinforcement film 43 is bonded to the surface, opposite to the surface that is provided with the coaxial cables 30, of the connection board 20. The reinforcement film 43 can increase the strength of the portion where the coaxial flat cable 10 and the connection board 20 are connected to each other.
[Description of symbols]
[0057]
10: Coaxial flat cable
20: Connection board
22: Signal terminal member
25: Pad portion (ground portion)
30: Coaxial cable
31 : Center conductor
32: Inner insulator 33: Outer conductor 34: Outer sheath 41: Resin film 42: Protective film 91: Jig

Claims

Claims
1. A wiring member comprising:
a coaxial flat cable comprising:
plural coaxial cables each having a center conductor, an inner insulator formed on an outer circumferential surface of the center conductor, an outer conductor formed on an outer circumferential surface of the inner insulator, and an outer sheath formed on an outer circumferential surface of the outer conductor; and
a resin film which is bonded to the plural coaxial cables from at least one of the two sides of an arrangement plane of the plural coaxial cables to maintain a parallel arrangement of the plural coaxial cables; and
a connection board connected to at least one end portion, in its longitudinal direction, of the coaxial flat cable, wherein:
in an end portion of each of the plural coaxial cables connected to the connection board, the outer conductor, the inner insulator, and the center conductor are exposed in sequence;
the connection board comprises signal terminal members to which the center conductors of the plural coaxial cables are soldered, respectively, and a ground portion to which the outer conductors of the plural coaxial cables are connected electrically; and
exposed portions of the center conductors are bent to as a whole to the same side in an arrangement direction of the coaxial cables.
2. The wiring member according to claim 1, wherein margins are located between two side edges of the resin film and two end coaxial cables in the arrangement direction of the coaxial cables, and the exposed portions of the center conductors are bent from the side of a smaller margin to the side of a larger margin.
3. The wiring member according to claim 1, wherein at least exposed portions of the outer conductors and further tip portions of the coaxial cables are covered with a protective film.
4. The wiring member according to claim 1, wherein an end portion of the resin film is bonded and fixed to the connection board.
5. A wiring member comprising:
a coaxial flat cable comprising:
plural coaxial cables each having a center conductor, an inner insulator formed on an outer circumferential surface of the center conductor, an outer conductor formed on an outer circumferential surface of the inner insulator, and an outer sheath formed on an outer circumferential surface of the outer conductor; and
a resin film which is bonded to the plural coaxial cables from at least one of the two sides of an arrangement plane of the plural coaxial cables to maintain a parallel arrangement of the plural coaxial cables; and
a connection board connected to at least one end portion, in its longitudinal direction, of the coaxial flat cable, wherein:
in an end portion of each of the plural coaxial cables connected to the connection board, the outer conductor, the inner insulator, and the center conductor are exposed in sequence;
the connection board comprises signal terminal members to which the center conductors of the plural coaxial cables are soldered, respectively, and a ground portion to which the outer conductors of the plural coaxial cables are connected electrically; exposed portions of the center conductors are bent as a whole to the same side from the side of a smaller margin to a larger margin, the margins being located between two side edges of the resin film and two end coaxial cables in an arrangement direction of the plural coaxial cables;
at least exposed portions of the outer conductors and further tip portions of the coaxial cables are covered with a protective film; and
an end portion of the resin film is bonded and fixed to the connection board.
6. A manufacturing method of a wiring member, comprising:
an arranging step of arranging, in a plane, plural coaxial cables each having a center conductor, an inner insulator formed on an outer circumferential surface of the center conductor, an outer conductor formed on an outer circumferential surface of the inner insulator, and an outer sheath formed on an outer circumferential surface of the outer conductor;
a laminating step of bonding a resin film to the plural coaxial cables from at least one of the two sides of an arrangement plane of the plural coaxial cables to produce a coaxial flat cable in which a parallel arrangement of the plural coaxial cables is maintained;
a termination working step of performing termination working of exposing the outer conductor, the inner insulator, and the center conductor in sequence in an end portion of each of the plural coaxial cables;
a positioning step of positioning an end portion of the coaxial flat cable with respect to the connection board; and a conductors connecting step of connecting the outer conductors to a ground portion of the connection board, and then soldering the center conductors to respective signal terminal members of the connection board,
wherein in the conductors connecting step, after connecting the outer conductors to the ground portion, causing a jig to grip exposed portions of all of the center conductors deviated from the respective signal terminal members in an arrangement direction of the plural coaxial cables and moving the jig to a side that is opposite to the side of the deviation of the center conductors, to thereby bend the exposed portions, held by the jig, of the center conductors as a whole to the same side in the arrangement direction of the plural coaxial cables and to position the exposed portions of the center conductors finally so that they are placed on or over the respective signal terminal members.
7. The manufacturing method of a wiring member according to claim 6, further comprising, as a step to be executed after the conductors connecting step, a protective film applying step of applying a protective film to at least exposed portions of the outer conductors and further tip portions of the coaxial cables.
PCT/CN2014/072382 2014-02-21 2014-02-21 Wiring member and manufacturing method thereof WO2015123864A1 (en)

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PCT/CN2014/072382 WO2015123864A1 (en) 2014-02-21 2014-02-21 Wiring member and manufacturing method thereof
JP2016570151A JP6252694B2 (en) 2014-02-21 2014-02-21 Wiring member and manufacturing method thereof

Applications Claiming Priority (1)

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PCT/CN2014/072382 WO2015123864A1 (en) 2014-02-21 2014-02-21 Wiring member and manufacturing method thereof

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JP6998503B2 (en) * 2017-07-20 2022-01-18 パナソニックＩｐマネジメント株式会社 Electronic device assembly equipment and electronic device assembly method
CN108453337B (en) * 2018-03-06 2022-01-11 奇鋐科技股份有限公司 Welding jig and welding method thereof
KR102012385B1 (en) * 2018-12-13 2019-08-20 주식회사 토마스 케이블 Cables of clamps that consist of double jacket layer
JP7028854B2 (en) * 2019-12-26 2022-03-02 株式会社オートネットワーク技術研究所 Wire harness and power storage module

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JP2017511968A (en) 2017-04-27
CN106030729A (en) 2016-10-12
JP6252694B2 (en) 2017-12-27

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