Shielded wire and wire harness

Patent metadata

Field	Value
Publication number	US-9953745-B2
Application number	US-201715695168-A
Country	US
Kind code	B2
Filing date	Sep 5, 2017
Priority date	Sep 7, 2016
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

A shielded wire includes an electrical wire including a conductor portion and a covering portion, a shield braid in which electrically conductive wire members are braided, and which covers an outer circumference of the electrical wire, a tubular sheath disposed on an outer circumference of the shield braid and made of an insulating resin.

First claim

What is claimed is:

1. A shielded wire comprising:
an electrical wire including a conductor portion and a covering portion;
a shield braid in which electrically conductive wire members are braided, and which covers an outer circumference of the electrical wire; and
a tubular sheath disposed on an outer circumference of the shield braid and made of an insulating resin,
wherein D1 is an inner diameter of the sheath in a state where the sheath is disposed on the outer circumference of the shield braid,
wherein t is a thickness of the sheath in the state where the sheath is disposed on the outer circumference of the shield braid,
wherein E is a modulus of elasticity of the sheath,
wherein μ A is a coefficient of static friction between the shield braid and the electrical wire,
wherein μ B is a coefficient of static friction between the shield braid and the sheath,
wherein F max is a value of a load which, in a fatigue test where a load is repeatedly applied to the shield braid in an axial direction of the braid, is obtained when an electrical resistance value of the shield braid is increased by 10% with respect to an initial value at a timing when the load is repeatedly applied 5 million times,
wherein D2 is an inner diameter of the sheath in a free state, and
wherein D2 satisfies following relational expression (1)

D
⁢

⁢
1

-

D
⁢

⁢

1
2

⁢

F

⁢
max

×

10
4

π
⁢

⁢

tE
⁡

(

μ
A

+

μ
B

)

≦

D
⁢

⁢
2

<

D
⁢

⁢
1.

(
1
)

2. A wire harness comprising the shielded wire according to claim 1 .

Assignees

• Yazaki Corp

Inventors

• Ohgushi Kazuhiro
• Yoshinaga Satoru

Classifications

• H01B7/0045

  Cable-harnesses · CPC title

• H01B7/0216

  Two layers · CPC title

• H01B7/18 Primary

  Protection against damage caused} by wear, mechanical force or pressure; {Sheaths; Armouring · CPC title

• H01B11/1869 Primary

  Construction of the layers on the outer side of the outer conductor · CPC title

• H01B11/1878

  Special measures in order to improve the flexibility · CPC title