The Furukawa Electric Co., Ltd.

Furukawa Automotive Systems Inc.

Ryosuke Matsuo

Koji Sato

Kengo Mitose

Hiroshi Kaneko

Shigeki Sekiya

Sho Yoshida

Akira Tachibana

Kiyoshige Hirose

A rotatable connector device includes a stationary member, a rotatable member rotatably attached thereto, and a flat cable housed in an annular space between the stationary and rotatable members. One end of the flat cable is connected to a stationary-side connector fixed to the stationary member, and another end of the flat cable is connected to a rotating-side connector fixed to the rotatable member. The flat cable includes a folded-back portion bent and folded back at a middle section in a longitudinal direction thereof. The flat cable includes a predetermined number of conductor/conductors each comprising a copper alloy and wound up or rewound with bending kept at the folded-back portion. Each conductor satisfies Y&#x2265;14.175X&#x2212;249.35X+1406.9 for a bending radius of 4 to 8 mm, where X denotes bending radius, and Y denotes 0.2% yield stress, and has an electrical conductivity of 50% IACS or greater.

Rotatable connector device

An aluminum alloy conductor wire has a composition comprising Mg: 0.1-1.0 mass %, Si: 0.1-1.20 mass %, Fe: 0.01-1.40 mass %, Zr: 0.01-0.50 mass %, Ti: 0-0.100 mass %, B: 0-0.030 mass %, Cu: 0-1.00 mass %, Ag: 0-0.50 mass %, Au: 0-0.50 mass %, Mn: 0-1.00 mass %, Cr: 0-1.00 mass %, Hf: 0-0.50 mass %, V: 0-0.50 mass %, Sc: 0-0.50 mass %, Co: 0-0.50 mass %, Ni: 0-0.50 mass %, and the balance: Al and inevitable impurities, where Ti, B, Cu, Ag, Au, Mn, Cr, Hf, V, Sc, Co and Ni are arbitrary additive components of which at least one component may be contained or none of the components may be contained. A density of a compound having a particle size of 0.5-5.0 &#x3bc;m and containing Fe is 1 to 300 particles/10000 &#x3bc;m. Mg/Si ratio, which is a ratio of Mg in mass % to Si in mass %, is greater than 1.

Aluminum alloy conductor wire, aluminum alloy stranded wire, coated wire, wire harness and method of manufacturing aluminum alloy conductor wire

A rolled copper foil comprises one of copper and a copper alloy. The rolled copper foil has a rolled surface and two side surfaces adjacent to the rolled surface. Each of the side surfaces being a non-sheared surface that is not a sheared surface. An area ratio of crystal grains oriented at a deviation angle of less than or equal to 13&#xb0; from Cube orientation is greater than or equal to 6%.

Rolled copper foil, method of manufacturing a rolled copper foil, flexible flat cable, and method of manufacturing a flexible flat cable

A method of manufacturing a terminal comprising, in the following order, preparing a sheet material comprising 0.005 mass %-3.000 mass % in total of at least one element selected from Mg, Si, Cu, Zn, Mn, Ni, Cr and Zr, the balance being Al and incidental impurities, performing solution heat treatment by heating the sheet material, cold rolling the solution heat treated sheet material, forming a metal coating layer over a part of or an entirety of the cold-rolled sheet material, the metal coating layer being composed primarily of Sn, Cr, Cu, Zn, Au or Ag, or an alloy composed primarily thereof, forming a developed terminal material by punching the sheet material into a developed view geometry of a terminal, forming the developed terminal material into a terminal, and performing an aging treatment on the terminal at 150-190&#xb0; C. for 60-600 minutes.

Terminal and method of manufacturing a terminal

A rectangular rolled copper foil includes copper or a copper alloy having a 0.2% yield strength of greater than or equal to 250 MPa. In a cross section perpendicular to a rolling direction, an area ratio of crystal grains oriented at a deviation angle of less than or equal to 12.5&#xb0; from a Cube orientation is greater than or equal to 8%.

Rectangular rolled copper foil, flexible flat cable, rotary connector, and method of manufacturing rectangular rolled copper foil

A flat cable includes a predetermined number of conductors, a pair of insulating films disposed in such a manner as to sandwich the predetermined number of conductors, and an adhesive layer provided between the pair of insulating films. The conductors each satisfies Y&#x2265;1.2&#xd7;t&#xd7;E/(2X&#x2212;t) within a range of bending radius of 4 mm to 8 mm, where X (mm) denotes bending radius, Y (MPa) denotes 0.2% yield stress, t (mm) denotes thickness, and E (MPa) denotes Young's modulus. The conductors each has an electrical conductivity of greater than or equal to 50% IACS.

Flat cable, method for manufacturing the same, and rotatable connector device including the same

An aluminum alloy conductor wire has a composition comprising Mg: 0.1-1.0 mass %, Si: 0.1-1.20 mass %, Fe: 0.01-1.40 mass %, Ti: 0-0.100 mass %, B: 0-0.030 mass %, Cu: 0-1.00 mass %, Ag: 0-0.50 mass %, Au: 0-0.50 mass %, Mn: 0-1.00 mass %, Cr: 0-1.00 mass %, Zr: 0-0.50 mass %, Hf: 0-0.50 mass %, V: 0-0.50 mass %, Sc: 0-0.50 mass %, Co: 0-0.50 mass %, Ni: 0-0.50 mass %, and the balance: Al and inevitable impurities, where Ti, B, Cu, Ag, Au, Mn, Cr, Zr, Hf, V, Sc, Co and Ni are arbitrary additive components of which at least one component may be contained or none of the components may be contained. A density of a compound having a particle size of 0.5-5.0 &#x3bc;m and containing Fe is 1 to 300 particles/10000 &#x3bc;m.

A terminal includes a connector portion electrically connectable to an external terminal, a tubular crimp portion formed integrally or separate from the connector portion and crimps with a wire, and a transition portion coupling the two. The tubular crimp portion of a copper or copper alloy metal base material or a metal member having the same is a tubular member closed on transition portion side and reduces in diameter towards the transition portion side such that a conductor-end portion of the electric wire is un-exposed. The tubular crimp portion has a belt-shaped weld portion along a longitudinal direction of the tubular crimp portion. A circumferential direction of the tubular crimp portion matches the RD-direction of the base material. A sum of area ratios R1, R2 and R3 in a rolling plane of the base material, of Cube-, RDW-, and Goss-oriented crystal grains, respectively, is greater than or equal to 15%.

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Tokyo, Japan

Ryosuke Matsuo