Flat data transmission cable

Patent metadata

Field	Value
Publication number	US-10772202-B2
Application number	US-201916408354-A
Country	US
Kind code	B2
Filing date	May 9, 2019
Priority date	Jun 1, 2018
Publication date	Sep 8, 2020
Grant date	Sep 8, 2020

Abstract

A flat data transmission cable includes a plurality of juxtaposed wires, a plastic layer enclosing on the wires integrally and a metallic layer formed by a metal material belt arranged on an outer side of the plastic layer in a spiral winding way. In the length direction of the data transmission cable, the data transmission cable has at least one bending portion, the data transmission cable is formed with a first section and a second section on both sides of the bending portion, and a stable bending angle is formed between the first section and the second section.

First claim

What is claimed is:

1. A flat data transmission cable, comprising:
a plurality of juxtaposed wires;
a plastic layer enclosing on the wires integrally;
a metallic layer formed by a metal material belt arranged on an outer side of the plastic layer in a spiral winding way;
wherein in the length direction of the data transmission cable, the data transmission cable has at least one bending portion, the data transmission cable is formed with a first section and a second section on both sides of the bending portion, and a stable bending angle is formed between the first section and the second section, the wires comprise a plurality of grounding wires and a plurality of signal wires, two signal wires neighboring to each other constitute a signal wire group, the wires are disposed in an equally spaced arrangement, and conductors of the wires have a same outer diameter, and the ratio of the center distance between every two neighboring wires to the outer diameter of the conductor is in the range of 1.4 to 2.8.

2. A flat data transmission cable, comprising:
a plurality of juxtaposed wires;
a plastic layer enclosing on the wires integrally;
a metallic layer formed by a metal material belt arranged on an outer side of the plastic layer in a spiral winding way;
wherein in the length direction of the data transmission cable, the data transmission cable has at least one bending portion, the data transmission cable is formed with a first section and a second section on both sides of the bending portion, and a stable bending angle is formed between the first section and the second section, the metal belt has a width W, in a length direction of the data transmission cable, the metal belt is wound with N rings, the data transmission cable has a length L, and the requirement of L<N*W is satisfied.

3. The flat data transmission cable as claimed in claim 1 , wherein the data transmission cable is bent at a predetermined bending angle to form the bending portion, and the difference between the stable bending angle after bending and the predetermined bending angle is less than 10 degrees.

4. The flat data transmission cable as claimed in claim 1 , wherein the difference between the average impedance of the data transmission cable with at the least one bending portion and the predetermined impedance of the data transmission cable is not greater than 2 Ohm.

5. The flat data transmission cable as claimed in claim 4 , wherein the difference between the impedance of the data transmission cable at said at least one bending portion and the predetermined impedance of the data transmission cable is not greater than 2 Ohm.

6. The flat data transmission cable as claimed in claim 1 , wherein signal delay of the data transmission cable is not greater than 5 picoseconds per unit length.

7. The flat data transmission cable as claimed in claim 1 , wherein the difference between the insertion loss of the data transmission cable after bending and that of revoking bending is less than 10%, and the plastic layer is made from polyhydrocarbon compound.

8. The flat data transmission cable as claimed in claim 7 , wherein the difference between the reflection loss of the data transmission cable after bending and that of revoking bending is less than 10%.

9. The flat data transmission cable as claimed in claim 1 , wherein the metal belt has a width W, in a length direction of the data transmission cable, the metal belt is wound with N rings, the data transmission cable has a length L, and the requirement of L<N*W is satisfied.

10. The flat data transmission cable as claimed in claim 9 , wherein an overlapping coating area is formed between every two adjacent rings of the metal belt, and the overlapping coating area has a width w along the width direction of the metal belt, the proportion of the width w of the overlapping coating area occupying the width W of the metal belt is 5% to 50%.

11. The flat data transmission cable as claimed in claim 10 , wherein the width w of the overlapping coating area is at least 0.5 mm.

12. The flat data transmission cable as claimed in claim 10 , wherein the winding angle of the metal belt relative to the width direction of the data transmission cable is in the range of 40° to 55°.

13. The flat data transmission cable as claimed in claim 9 , wherein the width of the metal belt is defined not less than half of the whole width of the data transmission cable.

14. The flat data transmission cable as claimed in claim 1 , wherein the metallic layer has at least an aluminum foil layer and a bonding layer arranged on the side of the aluminum foil layer facing to the plastic layer, the metallic layer is bonded to the outer side of the plastic layer by the bonding layer after hot melting.

15. The flat data transmission cable as claimed in claim 14 , wherein the metallic layer further has an insulating layer arranged on the side of the aluminum foil layer deviating from the plastic layer, the whole thickness of the metallic layer is defined in the range of 0.010 mm to 0.055 mm.

16. The flat data transmission cable as claimed in claim 1 , further comprising a mylar layer coated on the outside of the metallic layer, wherein the mylar layer is also defined on the metallic layer in a spiral winding way, the mylar layer and the metallic layer are further defined in a cross-winding way.

17. The flat data transmission cable as claimed in claim 1 , wherein the data transmission cable has a horizontal flame retardant grade of FT-2 rating.

18. The flat data transmission cable as claimed in claim 1 , wherein each wire has a conductor and an insulative cladding layer enclosing on the conductor, the cladding layer is made from polyhydrocarbon compound.

19. The flat data transmission cable as claimed in claim 18 , wherein the cladding layer is made of same material as the plastic layer.

Assignees

• Alltop Electronics Suzhou Ltd

Inventors

• Ni Mindi
• Chen Yichang

Classifications

• H05K2201/094

  Array of pads or lands differing from one another, e.g. in size, pitch or thickness; Using different connections on the pads · CPC title

• H01B11/00

  Communication cables or conductors · CPC title

• H01R12/53

  connecting to cables except for flat or ribbon cables · CPC title

• H01B7/295 Primary

  using material resistant to flame · CPC title

• H01B7/228

  Metal braid · CPC title