Shielded cable

Patent metadata

Field	Value
Publication number	US-10763012-B2
Application number	US-201816039145-A
Country	US
Kind code	B2
Filing date	Jul 18, 2018
Priority date	Mar 29, 2018
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

A shielded cable includes an inner conductor, an insulation covering an outer periphery of the inner conductor, and an outer conductor covering an outer periphery of the insulation. The outer conductor includes a first outer conductor covering the outer periphery of the insulation and including a served shield with first element wires spirally wound, and a second outer conductor covering an outer periphery of the first outer conductor and including a braided shield with second element wires braided.

First claim

What is claimed is:

1. A shielded cable, comprising,
an inner conductor;
an insulation comprising an extrusion coating covering an outer periphery of the inner conductor, the extrusion coating comprising a material selected from the group consisting of perfluoro ethylene propene copolymer (FEP), perfluoroalkoxy alkane (PFA), polyethylene (PE), polypropylene (PP), foamed PE, and foamed PP; and
an outer conductor covering an outer periphery of the insulation,
wherein the outer conductor comprises:
a first outer conductor covering directly the outer periphery of the insulation and comprising a served shield with first element wires spirally wound; and
a second outer conductor covering an outer periphery of the first outer conductor and comprising a braided shield with second element wires braided, and the first outer conductor is pressed inside by the second outer conductor in a radial direction,

wherein the first outer conductor consists of the served shield with first element wires spirally wound directly covering the outer periphery of the insulation,
wherein the first element wires are not coated by a lubricant oil, and the second element wires are coated by a lubricant oil,
wherein the first element wires comprise a copper alloy wire including a surface that is silver-plated, and
wherein the second element wires comprise a copper alloy wire including a surface that is tin-plated.

2. The shielded cable according to claim 1 , wherein the first outer conductor comprises the first element wires spirally wound on the outer periphery of the insulation without gaps.

3. The shielded cable according to claim 1 , wherein the insulation comprises one member selected from the group consisting of perfluoro ethylene propene copolymer (FEP), perfluoroalkoxy alkane (PFA), foamed PE and foamed PP.

4. The shielded cable according to claim 1 , wherein the inner conductor comprises a plurality of inner conductor element wires, and a number of the first element wires is greater than a number of the inner conductor element wires.

5. The shielded cable according to claim 1 , wherein the inner conductor comprises a plurality of inner conductor element wires, and a diameter of the first element wires is less than a diameter of the inner conductor element wires.

6. The shielded cable according to claim 1 , wherein a diameter of the first element wires is the same as a diameter of the second element wires.

7. The shielded cable according to claim 1 , wherein a number of the first element wires is greater than a number of ends of the second outer conductor.

8. The shielded cable according to claim 1 , wherein a combined width of the first element wires is greater than an outer diameter of the insulation.

9. The shielded cable according to claim 1 , wherein a winding pitch of the first element wires is greater than an outer diameter of the insulation.

10. The shielded cable according to claim 1 , wherein the inner conductor comprises a plurality of inner conductor element wires comprising a copper alloy wire including a surface that is silver-plated.

11. The shielded cable according to claim 1 , wherein the second outer conductor presses on the first outer conductor so as to prevent movement by the first element wires in a longitudinal direction of the shielded cable.

12. The shielded cable according to claim 1 , further comprising:
a jacket formed on the second outer conductor; and
a termination where the jacket is not formed, the second outer conductor pressing on the first outer conductor so as to prevent movement by the first element wires outwardly in a radial direction at the termination.

13. The shielded cable according to claim 1 , wherein the second outer conductor presses on the first outer conductor so as to inhibit a gap from forming between the first element wires when bending the shielded cable.

14. A shielded cable, comprising,
an inner conductor;
an insulating layer formed on the inner conductor and comprising one of perfluoro ethylene propene copolymer (FEP), perfluoroalkoxy alkane (PFA), polyethylene (PE), polypropylene (PP), foamed PE, and foamed PP; and
an outer conductor formed on the insulating layer and comprising:
a first outer conductor formed directly on the insulating layer and comprising a served shield with spirally wound first element wires; and
a second outer conductor formed on the first outer conductor and comprising a braided shield with braided second element wires, the first outer conductor being pressed inside by the second outer conductor in a radial direction,

wherein the first outer conductor consists of the served shield with first element wires spirally wound directly covering the outer periphery of the insulation,
wherein the first element wires are not coated by a lubricant oil, and the second element wires are coated by a lubricant oil,
wherein the first element wires comprise a copper alloy wire including a surface that is silver-plated, and
wherein the second element wires comprise a copper alloy wire including a surface that is tin-plated.

15. The shielded cable according to claim 14 , wherein the inner conductor comprises a plurality of inner conductor element wires.

16. The shielded cable according to claim 15 , wherein a number of the inner conductor element wires is seven or more.

17. The shielded cable according to claim 15 , wherein the plurality of inner conductor element wires comprises one of soft copper wires and copper alloy wires.

18. The shielded cable according to claim 14 , further comprising:
a jacket formed on the second outer conductor.

19. The shielded cable according to claim 18 , wherein the jacket comprises one of urethane and foamed polyethylene resin.

20. The shielded cable according to claim 14 , wherein the first element wires comprise one of soft copper wires and copper alloy wires having conductivity of not less than 90%.

21. The shielded cable according to claim 14 , wherein an outer diameter of the inner conductor is greater than a thickness of the insulating layer.

22. The shielded cable according to claim 14 , wherein an outer diameter of the inner conductor is greater than a combined thickness of the first and second outer conductors.

23. A shielded cable, comprising,
an inner conductor comprising a plurality of inner conductor element wires comprising a copper alloy wire including a surface that is silver-plated;
an insulation comprising an extrusion coating covering an outer periphery of the inner conductor, the extrusion coating comprising a material selected from the group consisting of perfluoro ethylene propene copolymer (FEP), perfluoroalkoxy alkane (PFA), polyethylene (PE), polypropylene (PP), foamed PE, and foamed PP; and
an outer conductor covering an outer periphery of the insulation, the outer conductor comprising:
a first outer conductor as a served shield, the first outer conductor comprising spirally-wound first element wires directly covering the outer periphery of the insulation, the first element wires comprising a copper alloy wire including a surface that is silver-plated, and the first element wires being not coated with a lubricant oil; and
a second outer conductor as a braided shield, the second outer conductor comprising braided second element wires covering an outer periphery of the first outer conductor and pressing the first outer conductor in a radial direction so as to prevent movement by the first element wires in a longitudinal direction of th

Assignees

• Hitachi Metals Ltd

Inventors

• Watanabe Haruyuki
• Huang Detian
• Aida Kazuhiro
• Kobayashi Masanori

Classifications

• H01B11/1878 Primary

  Special measures in order to improve the flexibility · CPC title

• H01B1/026 Primary

  Alloys based on copper · CPC title

• H01B11/1869

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

• H01B7/228

  Metal braid · CPC title

• H01B11/1808

  Construction of the conductors · CPC title