US 11,887,757 B2
Insulated electric wire and wire harness
Kenichiro Araki, Yokkaichi (JP); and Toyoki Furukawa, Yokkaichi (JP)
Assigned to AUTONETWORKS TECHNOLOGIES, LTD., Mie (JP); SUMITOMO WIRING SYSTEMS, LTD., Mie (JP); and SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/426,530
Filed by AUTONETWORKS TECHNOLOGIES, LTD., Yokkaichi (JP); SUMITOMO WIRING SYSTEMS, LTD., Yokkaichi (JP); and SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed Jan. 17, 2020, PCT No. PCT/JP2020/001453
§ 371(c)(1), (2) Date Jul. 28, 2021,
PCT Pub. No. WO2020/158445, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. PCT/JP2019/003195 (WO), filed on Jan. 30, 2019; application No. PCT/JP2019/003196 (WO), filed on Jan. 30, 2019; and application No. 2019-219009 (JP), filed on Dec. 3, 2019.
Prior Publication US 2022/0102026 A1, Mar. 31, 2022
Int. Cl. H01B 7/285 (2006.01); H01B 7/00 (2006.01)
CPC H01B 7/285 (2013.01) [H01B 7/0045 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An insulated electric wire comprising:
a conductor in which a plurality of elemental wires made of a metal material are twisted together; and
an insulation covering that covers an outer circumference of the conductor;
wherein the insulated electric wire further comprises:
an exposed portion in which the insulation covering is removed from the outer surface of the conductor; and
a first covered portion and a second covered portion in which the insulation covering covers the outer circumference of the conductor,
the first covered portion, the exposed portion, and the second covered portion being adjacent to each other in a direction of a longitudinal axis of the insulated electric wire in this order,
a water-stopping portion being further provided in at least an area extending from a part of the exposed portion to a part of the first covered portion, gaps between the elemental wires in the water-stopping portion being filled with a water-stopping agent, and
a region of the second covered portion that is adjacent to the exposed portion being a non-waterproof end that has a void between the conductor and the insulation covering, wherein
in the second covered portion, an outer diameter of the conductor is smaller in an area of the non-waterproof end adjacent to the exposed portion than in a remote area that is distanced from the exposed portion.
 
2. The insulated electric wire according to claim 1,
wherein the second covered portion also has the void between the elemental wires.
 
3. The insulated electric wire according to claim 1,
wherein a region of the first covered portion that is adjacent to the exposed portion is a waterproof end in which a gap between the conductor and the insulation covering is filled with the water-stopping agent.
 
4. The insulated electric wire according to claim 3,
wherein an outer circumference of the insulation covering at the waterproof end is covered by the water-stopping agent, continuously from the gap between the insulation covering and the conductor filled with the water-stopping agent,
an outer circumference of the insulation covering at the non-waterproof end is not covered by the water-stopping agent, and
the exposed portion contains, at a position adjacent to the non-waterproof end, a zone in which the water-stopping agent is not placed on the outer circumference of the conductor.
 
5. The insulated electric wire according to claim 1,
wherein the outer diameter of the conductor is smaller in the exposed portion than in the remote area.