Cable

Abstract

The utility model discloses a cable which comprises a pair of core wires, a sheath wrapping the pair of core wires, a shielding layer wrapping the sheath, an outer insulating layer wrapping the shielding layer and a bare ground wire arranged between the sheath and the shielding layer, and a limiting space is arranged on the outer side of the sheath. The bare ground wire is at least partially accommodated in the accommodating space, the sheath wraps the pair of core wires in an extrusion molding mode, and no air gap exists between the sheath and the pair of core wires.

Description

[Technical Field]

[0001] This utility model relates to a cable, and more particularly to a high-speed signal cable for transmitting high-frequency signals. [Background Technology]

[0002] With the rapid development of technologies such as big data, artificial intelligence (AI), and cloud computing, the demand for computing performance and data storage in servers is increasing daily. Traditional cables can no longer meet the bandwidth transmission requirements of high-speed copper cables (224G, 1.6T). Meanwhile, with the continuous advancement of Industry 4.0, more and more manual operations are being replaced by robots and automated equipment. Ensuring that automated equipment can accurately complete processing tasks makes product dimensions crucial. The following sheathed products face a serious problem of ground wire misalignment, causing significant inconvenience to automated equipment processing. This ground wire misalignment results in cable structural asymmetry, large deviations in S-parameters, and ultimately, product defects.

[0003] Chinese Utility Model Patent No. CN212434276U discloses a cable comprising a pair of parallel core wires, a shielding layer covering the core wires, an insulating sheath covering the shielding layer, and a ground wire disposed between the shielding layer and the insulating sheath. The ground wire is not fixed and is prone to displacement during production or use, affecting the cable's shielding performance and leading to unstable SI performance.

[0004] Therefore, it is necessary to provide a new type of cable that has a stable structure and stable and reliable signal transmission. [Utility Model Content]

[0005] The main objective of this invention is to provide a cable with a stable structure and good electrical performance.

[0006] To achieve the above objectives, the present invention can adopt the following technical solution: a cable comprising a pair of core wires, a sheath covering the pair of core wires, a shielding layer covering the sheath, an outer insulation layer covering the shielding layer, and a bare ground wire disposed between the sheath and the shielding layer. A limiting space is provided on the outer side of the sheath, and the bare ground wire is at least partially housed within the housing space. The sheath is extruded and molded to cover the pair of core wires, and there is no air gap between the sheath and the pair of core wires.

[0007] Compared with the prior art, the present invention has the following advantages: the sheath is provided with a limiting space to fix the bare ground wire, so that the position of the bare ground wire is relatively fixed and the offset from the position of the inner conductor is within a certain angle. In addition, the sheath is extruded and molded to cover the pair of core wires, so that the relative position of the two inner conductors is fixed, and there is no air gap between the sheath and the pair of core wires, so that the cable becomes a whole structure and the position of the two core wires is not easy to change in subsequent processing. [Attached Image Description]

[0008] Figure 1 This is a cross-sectional view of the first embodiment of the cable of this utility model.

[0009] Figure 2 This is a cross-sectional view of the second embodiment of the cable of this utility model.

[0010] Figure 3 This is a cross-sectional view of the third embodiment of the cable of this utility model.

[0011] Figure 4 This is a cross-sectional view of the fourth embodiment of the cable of this utility model.

[0012] [Explanation of Key Component Symbols]

[0013] Cables 100, 200, 300, 400; Core wires 11, 21, 41

[0014] Inner conductor 111, inner insulation layers 112, 212, 412

[0015] Sheath 13, 33, 43; Shielding layer 15

[0016] 17 Outer insulation layer 18 Bare ground wire

[0017] Limiting space 131

Detailed Implementation Methods

[0018] Please see Figure 1 The image shows a first embodiment of the cable 100 of this utility model. The cable 100 includes a pair of core wires 11, a sheath 13 covering the pair of core wires 11, a shielding layer 15 covering the sheath 13, an outer insulation layer 17 covering the shielding layer 15, and a bare ground wire 18 disposed between the sheath 13 and the shielding layer 15.

[0019] Each of the pair of core wires 11 has a circular cross-section. The pair of inner core wires 10 are arranged side by side in the transverse direction and are in contact with each other. Each of the pair of inner core wires 11 includes an inner conductor 111 and an inner insulation layer 112 covering the inner conductor 111. The inner conductor 111 is used to transmit high-speed signals. The inner conductor 111 is made of silver-plated copper, tin-plated copper, or bare copper. The inner insulation layer 112 is extruded and wrapped around the respective inner conductor 111. The pair of inner core wires 11 are made separately for easy size control and management. The inner insulation layers 112 of the two core wires 11 are close to each other. The inner insulation layer 112 is made of any one of FEP (perfluoroethylene propylene copolymer), PFA (soluble polytetrafluoroethylene), PE (polyethylene), PTFE (tetrafluoroethylene copolymer), PP (polypropylene), and TPX (polymethylpentene).

[0020] The sheath 13 has limiting spaces 131 on its two outer sides in the lateral direction. The bare ground wire 18 is at least partially housed and fixed within the limiting spaces 131. The sheath 13 is extruded and molded to cover the pair of core wires 11, such that the two inner conductors 111 are separated by the thickness of two inner insulation layers 112. This fixes the relative position of the two inner conductors 111. There is no air gap between the sheath 13 and the pair of core wires 11. The sheath 13 is made of any one of FEP, PFA, PE, PTFE, PP, or TPX.

[0021] The bare ground wire 18 includes a pair. The pair of bare ground wires 18 are respectively disposed in the limiting spaces 131 on both sides in the lateral direction. The center of the pair of bare ground wires 18 is on the same straight line as the center of the inner conductor 111. The bare ground wire 18 is made of silver-plated copper, tin-plated copper, or bare copper. In other embodiments, only one bare ground wire 18 and one limiting space 131 may be provided.

[0022] The shielding layer 15 is wrapped around the sheath 13 in a longitudinal wrapping manner or in a spiral winding manner. The shielding layer 15 is one of aluminum foil, copper foil, silver-plated copper foil, alloy copper foil, or copper-aluminum composite strip. The metal layer can be single-sided or double-sided, and can also be adhesive-coated or non-adhesive-coated.

[0023] The outer insulating layer 17 is made of Mylar or PI material. The outer insulating layer 17 can be one or more layers. Specifically, in this embodiment, the outer insulating layer 17 is configured as two layers. The outer insulating layer 17 is spirally wound around the shielding layer 15. Adhesive may be applied to the outer insulating layer 17.

[0024] Please see Figure 2The image shows a second embodiment of the cable 200 of this utility model. Compared with the first embodiment, in this embodiment, the inner insulation layer 212 of the core wire 21 is made of foamed material. Specifically, the material of the inner insulation layer 212 is one of foamed FEP, foamed PFA, foamed PE, foamed PTFE, foamed PP, and foamed TPX, and the other settings are exactly the same as in the first embodiment.

[0025] Please see Figure 3 The image shows a third embodiment of the cable 300 of this utility model. Compared with the first embodiment, in this embodiment, the sheath 33 is made of foamed material. Specifically, in this embodiment, the sheath 33 is made of one of foamed FEP, foamed PFA, foamed PE, foamed PTFE, foamed PP, and foamed TPX.

[0026] Please see Figure 4 The image shows the fourth embodiment of the cable 400 of this utility model. Compared with the previous embodiments, in this embodiment, the inner insulation layer 412 and the sheath 43 of the core wire 41 are both made of foamed material. Specifically, in this embodiment, the inner insulation layer 412 is made of one of foamed FEP, foamed PFA, foamed PE, foamed PTFE, foamed PP, and foamed TPX, and the sheath 43 is made of one of foamed FEP, foamed PFA, foamed PE, foamed PTFE, foamed PP, and foamed TPX.

[0027] The cable 100 of this utility model has limiting spaces 131 on both sides of the outer side of the sheath 13 to fix the bare ground wire 18, so that the bare ground wire 18 is not affected by the rotational force of the outer insulation layer 17, and the position of the bare ground wire 18 is relatively fixed, and the offset from the position of the inner conductor 111 is within a certain angle. In addition, the sheath 13 is extruded and wrapped around the pair of core wires 11, so that the thickness of the two inner insulation layers 112 is isolated between the two inner conductors 111. In this way, the relative position of the two inner conductors 111 is fixed, and there is no air gap between the sheath 13 and the pair of core wires 11, so that the cable 100 becomes a whole structure, and the position of the two core wires 11 is not easily changed in subsequent processing.

Claims

1. A cable comprising a pair of core wires, a jacket covering the pair of core wires, a shield covering the jacket, an outer insulating layer covering the shield, and a bare ground wire disposed between the jacket and the shield, characterized by: The outer side of the sheath is provided with a limiting space, and the bare ground wire is at least partially housed and fixed within the limiting space. The sheath is extruded and molded to cover the pair of core wires, and there is no air gap between the sheath and the pair of core wires.

2. The cable of claim 1, wherein: The pair of core wires are arranged side by side in the transverse direction and are in contact with each other. Each of the pair of core wires includes an inner conductor and an inner insulation layer extruded and formed outside the inner conductor.

3. The cable of claim 2, wherein: The bare ground wires include a pair, which are respectively disposed on both sides in the lateral direction, and the center of the pair of bare ground wires is on the same straight line as the center of the inner conductor.

4. The cable of claim 2, wherein: At least one of the inner insulation layer and the sheath is made of foam material.

5. The cable of claim 2, wherein: The inner insulation layer material is any one of FEP, PFA, PE, PTFE, PP, TPX, foamed FEP, foamed PFA, foamed PE, foamed PTFE, foamed PP, and foamed TPX.

6. The cable as described in claim 2, characterized in that: The sheath material is any one of FEP, PFA, PE, PTFE, PP, TPX, foamed FEP, foamed PFA, foamed PE, foamed PTFE, foamed PP, and foamed TPX.

7. The cable of claim 2, wherein: The inner conductor is made of one of the following materials: silver-plated copper, tin-plated copper, or bare copper.

8. The cable of claim 1, wherein: The bare ground wire is made of one of the following materials: silver-plated copper, tin-plated copper, or bare copper.

9. The cable of claim 1, wherein: The shielding layer is one of aluminum foil, copper foil, silver-plated copper foil, alloy copper foil, or copper-aluminum composite strip.

10. The cable of claim 1, wherein: The outer insulation layer is made of one or more layers of Mylar or PI material.

Images