Coaxial cable and cable assembly

Patent metadata

Field	Value
Publication number	US-11942234-B2
Application number	US-202117410742-A
Country	US
Kind code	B2
Filing date	Aug 24, 2021
Priority date	Sep 10, 2020
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

A coaxial cable is composed of a conductor, an insulator covering a periphery of the conductor, a shield layer covering a periphery of the insulator, and a sheath covering a periphery of the shield layer. The shield layer is configured to include a lateral winding shielding portion with a plurality of metal wires being helically wrapped around the periphery of the insulator, and a batch plating portion made of a hot-dip plating covering respective peripheries of the lateral winding shielding portion. The shield layer includes a joining portion where the metal wires adjacent to each other in a circumferential direction are joined with each other with the batch plating portion at a spaced portion where the adjacent metal wires are spaced apart from each other, and the non-joining portion where the metal wires adjacent to each other in the circumferential direction are not joined with each other with the batch plating portion at the spaced portion. A length of the non-joining portion along a cable longitudinal direction is shorter than a winding pitch of the lateral winding shielding portion.

First claim

What is claimed is:

1. A coaxial cable, comprising:
a conductor;
an insulator covering a periphery of the conductor;
a shield layer covering a periphery of the insulator; and
a sheath covering a periphery of the shield layer,
wherein the shield layer includes a lateral winding shielding portion comprising a plurality of metal wires being helically wrapped around the periphery of the insulator to cover the periphery of the insulator, and a batch plating portion comprising a hot dip plating, which is covering a periphery of the lateral winding shielding portion,
wherein the shield layer includes a spaced portion where adjacent metal wires, of the plurality of metal wires, in a circumferential direction are spaced apart from each other, and a joining portion where the adjacent metal wires are joined to each other and a non-joining portion where the adjacent metal wires in the circumferential direction are not joined with each other with the batch plating portion at a part in a cable longitudinal direction of the spaced portion,
wherein a length of the non-joining portion along the cable longitudinal direction is shorter than a winding pitch of the lateral winding shielding portion, and
wherein the non-joining portion comprises a through hole penetrating through the batch plating portion in a radial direction,
further comprising a plurality of the non joining portions where the adjacent metal wires in the circumferential direction are not joined with each other with the batch plating portion at a part in a cable longitudinal direction of the spaced portion,
wherein the plurality of the non joining portions are dispersed discontinuously in the cable longitudinal direction,
wherein the number of the non-joining portions for each 1 meter in the coaxial cable is 10 or more and 20 or less,
wherein a plating layer is disposed on a periphery of each of the plurality of metal wires,
wherein the plating layer remains on a part of the plurality of metal wires being not brought into contact with the batch plating portion, and
wherein a length of the non-joining portion along a longitudinal direction of the plurality of metal wires is shorter than a length of the joining portion along the longitudinal direction of the plurality of metal wires.

2. The coaxial cable according to claim 1 , wherein a length of the through hole along a longitudinal direction of the metal wire is 0.1 mm or more and 1.0 mm or less.

3. The coaxial cable according to claim 1 , wherein a width of the non-joining portion in a cable circumferential direction is smaller than an outer diameter of a metal wire of the plurality of metal wires.

4. The coaxial cable according to claim 1 , wherein the shield layer includes outer peripheral portions where the plurality of the metal wires are being covered with the batch plating portion and inner peripheral portions where the plurality of the metal wires are not being covered with the batch plating portion, and
wherein an outer peripheral portion of the plurality of outer peripheral portions includes an intermetallic compound between the plurality of metal wires and the batch plating portion.

5. The coaxial cable according to claim 4 , wherein the batch plating portion comprises tin and a metal wire of the plurality of metal wires comprises a silver-plated anneal copper wire, and
wherein the intermetallic compound including tin and silver is formed between the plurality of metal wires and the batch plating portion.

6. A cable assembly comprising:
the coaxial cable according to claim 1 ; and
a terminal member integrally provided to at least one end portion of the coaxial cable.

7. The coaxial cable according to claim 1 , wherein a metal wire of the plurality of metal wires includes the plating layer on a surface of the metal wire.

8. The coaxial cable according to claim 1 ,
wherein a length of the through hole along a longitudinal direction of the metal wire is 0.1 mm or more and 1.0 mm or less,
wherein a width of the non-joining portion in a cable circumferential direction is smaller than an outer diameter of a metal wire of the plurality of metal wires,
wherein the shield layer includes outer peripheral portions where the plurality of the metal wires are being covered with the batch plating portion and inner peripheral portions where the plurality of the metal wires are not being covered with the batch plating portion, wherein an outer peripheral portion of the plurality of outer peripheral portions includes an intermetallic compound between the plurality of metal wires and the batch plating portion, and
wherein a metal wire of the plurality of metal wires includes the plating layer on a surface of the metal wire.

9. The coaxial cable according to claim 1 , wherein the batch plating portion has a corrugated shape along respective outer shapes of the plurality of metal wires fom1ing the lateral winding shielding portion, such that the batch plating portion has a concave shape in locations in the circumferential direction of the coaxial cable which correspond to locations between adjacent metal wires in the circumferential direction of the coaxial cable,
wherein the batch plating portion has air gaps at the concave locations between the batch plating portion and the sheath, such that when the coaxial cable is bent, an outer surface of the batch plating portion is stretched to allow bending.

10. The coaxial cable according to claim 1 , wherein the shield layer includes outer peripheral portions where the plurality of the metal wires are being covered with the batch plating portion and inner peripheral portions where the plurality of the metal wires are not being covered with the batch plating portion,
wherein the plating layer of each of the plurality of metal wires are disposed on the inner peripheral portions of the shield layer in which the plurality of metal wires are not being coated with the batch plating portion.

11. The coaxial cable according to claim 10 , wherein the plating layer remains on a part of the plurality of metal wires located inward on a side of the insulator in the radial directions of the coaxial cable.

12. The coaxial cable according to claim 11 , wherein the plating layer comprises a conductive layer.

13. The coaxial cable according to claim 11 , wherein the plating layer comprises Ag.

14. A coaxial cable, comprising:
a conductor;
an insulator covering a periphery of the conductor;
a shield layer covering a periphery of the insulator; and
wherein the shield layer includes a lateral winding shielding portion comprising a plurality of metal wires being helically wrapped around the periphery of the insulator to cover the periphery of the insulator, and a batch plating portion comprising a hot dip plating, which is covering a periphery of the lateral winding shielding portion,
wherein the shield layer includes a spaced portion where adjacent metal wires from among the plurality of metal wires, in a circumferential direction are spaced apart from each other, and a joining portion where the adjacent metal wires are joined to each other and a non-joining portion where the adjacent metal wires in the circumferential direction are not joined with each other with the batch plating portion at a part in a cable longitudinal direction of the spaced portion,
wherein a length of the non-joining portion along the cable longitudinal direction is shorter than a winding pitch of the lateral winding shielding portion, and
wherein the non-joining portion comprises a through hole penetrating through the batch plating portion in a radial direction,
wherein a plating layer is disposed on a periphery of

Assignees

• Hitachi Metals Ltd
• Proterial Ltd

Inventors

• Huang Detian
• Watanabe Takanobu
• Kuroda Hiromitsu
• Nonen Hideki

Classifications

• H01B11/20 Primary

  Cables having a multiplicity of coaxial lines · CPC title

• H01B7/08

  Flat or ribbon cables · CPC title

• H01B11/1041

  composed of a helicoidally wound wire-conductor · CPC title

• H01B11/1808

  Construction of the conductors · CPC title

• H01B11/18 Primary

  Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor · CPC title