Covered electrical wire and terminal-equipped electrical wire

Patent metadata

Field	Value
Publication number	US-11069459-B2
Application number	US-201816628458-A
Country	US
Kind code	B2
Filing date	Jul 4, 2018
Priority date	Jul 14, 2017
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A covered electrical wire including a conductor and an insulating coating layer covering an outer periphery of the conductor, in which the conductor is a twisted wire obtained by concentrically twisting together a plurality of elemental wires constituted by a copper alloy, the copper alloy contains one or more elements selected from Fe, Ti, Mg, Sn, Ag, Ni, In, Zn, Cr, Al, and P in a total amount of 0.01 mass % to 5.5 mass % inclusive, and the remaining portion includes Cu and inevitable impurities, and an amount of oil adhering to a surface of a central elemental wire disposed at a central portion of the twisted wire is 10 μg/g or less with respect to the mass of the central elemental wire.

First claim

The invention claimed is:

1. A covered electrical wire comprising:
a conductor; and
an insulating coating layer covering an outer periphery of the conductor,
wherein the conductor is a twisted wire obtained by concentrically twisting together a plurality of elemental wires constituted by a copper alloy,
the copper alloy contains one or more elements selected from Fe, Ti, Mg, Sn, Ag, Ni, In, Zn, Cr, Al, and P in a total amount of 0.01 mass % to 5.5 mass % inclusive, and the remaining portion includes Cu and inevitable impurities, and
an amount of oil adhering to a surface of a central elemental wire disposed at a central portion of the twisted wire is 10 μg/g or less with respect to the mass of the central elemental wire.

2. The covered electrical wire according to claim 1 , comprising
a coating film made of copper oxide on surfaces of the elemental wires,
wherein the coating film has a thickness of 10 nm or less.

3. The covered electrical wire according to claim 1 ,
wherein the conductor has a tensile strength of 450 MPa or more, and has a breaking elongation of 5% or more.

4. The covered electrical wire according to claim 1 ,
wherein the conductor has a cross-sectional area of 0.22 mm 2 or less, and
the twisted wire has a twist pitch of 12 mm or more.

5. The covered electrical wire according to claim 1 ,
wherein, when the minimum distance between an outer circumferential surface of the insulating coating layer and a crown portion, excluding a twisting groove, of an outer circumferential surface of each outer peripheral elemental wire disposed on the outermost side of the twisted wire is a thickness of the insulating coating layer, a ratio of the minimum value of the thickness to the maximum value of the thickness is 80% or more.

6. A terminal-equipped electrical wire comprising:
the covered electrical wire according to claim 1 ; and
a terminal portion attached to an end portion of the covered electrical wire.

7. The terminal-equipped electrical wire according to claim 6 ,
wherein, when a ratio of a cross-sectional area of a compressed portion of the conductor to which the terminal portion is attached to a cross-sectional area of an uncompressed portion of the conductor to which the terminal portion is not attached is a remaining area ratio, the remaining area ratio exceeds 0.76.

8. The covered electrical wire according to claim 2 ,
wherein the conductor has a tensile strength of 450 MPa or more, and has a breaking elongation of 5% or more.

9. The covered electrical wire according to claim 2 ,
wherein the conductor has a cross-sectional area of 0.22 mm 2 or less, and
the twisted wire has a twist pitch of 12 mm or more.

10. The covered electrical wire according to claim 3 ,
wherein the conductor has a cross-sectional area of 0.22 mm 2 or less, and
the twisted wire has a twist pitch of 12 mm or more.

11. The covered electrical wire according to claim 8 ,
wherein the conductor has a cross-sectional area of 0.22 mm 2 or less, and
the twisted wire has a twist pitch of 12 mm or more.

12. The covered electrical wire according to claim 2 ,
wherein, when the minimum distance between an outer circumferential surface of the insulating coating layer and a crown portion, excluding a twisting groove, of an outer circumferential surface of each outer peripheral elemental wire disposed on the outermost side of the twisted wire is a thickness of the insulating coating layer, a ratio of the minimum value of the thickness to the maximum value of the thickness is 80% or more.

13. The covered electrical wire according to claim 3 ,
wherein, when the minimum distance between an outer circumferential surface of the insulating coating layer and a crown portion, excluding a twisting groove, of an outer circumferential surface of each outer peripheral elemental wire disposed on the outermost side of the twisted wire is a thickness of the insulating coating layer, a ratio of the minimum value of the thickness to the maximum value of the thickness is 80% or more.

14. The covered electrical wire according to claim 4 ,
wherein, when the minimum distance between an outer circumferential surface of the insulating coating layer and a crown portion, excluding a twisting groove, of an outer circumferential surface of each outer peripheral elemental wire disposed on the outermost side of the twisted wire is a thickness of the insulating coating layer, a ratio of the minimum value of the thickness to the maximum value of the thickness is 80% or more.

15. The covered electrical wire according to claim 8 ,
wherein, when the minimum distance between an outer circumferential surface of the insulating coating layer and a crown portion, excluding a twisting groove, of an outer circumferential surface of each outer peripheral elemental wire disposed on the outermost side of the twisted wire is a thickness of the insulating coating layer, a ratio of the minimum value of the thickness to the maximum value of the thickness is 80% or more.

16. The covered electrical wire according to claim 9 ,
wherein, when the minimum distance between an outer circumferential surface of the insulating coating layer and a crown portion, excluding a twisting groove, of an outer circumferential surface of each outer peripheral elemental wire disposed on the outermost side of the twisted wire is a thickness of the insulating coating layer, a ratio of the minimum value of the thickness to the maximum value of the thickness is 80% or more.

17. The covered electrical wire according to claim 10 ,
wherein, when the minimum distance between an outer circumferential surface of the insulating coating layer and a crown portion, excluding a twisting groove, of an outer circumferential surface of each outer peripheral elemental wire disposed on the outermost side of the twisted wire is a thickness of the insulating coating layer, a ratio of the minimum value of the thickness to the maximum value of the thickness is 80% or more.

18. The covered electrical wire according to claim 11 ,
wherein, when the minimum distance between an outer circumferential surface of the insulating coating layer and a crown portion, excluding a twisting groove, of an outer circumferential surface of each outer peripheral elemental wire disposed on the outermost side of the twisted wire is a thickness of the insulating coating layer, a ratio of the minimum value of the thickness to the maximum value of the thickness is 80% or more.

Assignees

• Autonetworks Technologies Ltd
• Sumitomo Wiring Systems
• Sumitomo Electric Industries

Inventors

• Kobayashi Hiroyuki
• Sakamoto Kei

Classifications

• C22C9/00 Primary

  Alloys based on copper · CPC title

• H01B7/0216

  Two layers · CPC title

• H01B7/0275 Primary

  comprising one or more extruded layers of insulation · CPC title

• H01R4/185

  combined with a U-shaped insulation-receiving portion · CPC title

• C22F1/08

  of copper or alloys based thereon · CPC title