Dual-core cable

Abstract

This utility model discloses a two-core cable, including a pair of conductor cores, a core insulation layer, a shielding layer, and an outer sheath. The conductor cores are arranged parallel to each other and spaced apart. The core insulation layer seals around each conductor core and has multiple hollow channels. Each hollow channel is parallel to each other and surrounds each conductor core. The shielding layer surrounds the core insulation layer, and the outer sheath seals over the shielding layer. In this way, the dielectric constant can be effectively reduced by the hollow channels in the core insulation layer to improve the insulation performance of the two-core cable, thereby effectively reducing the volume and outer diameter of the two-core cable.

Description

Technical Field

[0001] This utility model relates to a cable, and more particularly to a dual-core cable that can effectively reduce the dielectric constant to improve insulation performance. Background Technology

[0002] With the rapid development of electronic technology, data transmission cables have become an important carrier for data and signal transmission and exchange. Among existing data transmission cables, parallel biaxial copper cables are widely used in various information fields due to their advantages such as high transmission rate, good stability, low latency, small size, and low cost, to meet the high-speed transmission and exchange of large-capacity audio, video, and image data signals. Parallel biaxial copper cables are mainly made by directly extruding solid insulating material at high temperature on the outside of two copper conductors, and then sequentially covering them with shielding and protective materials.

[0003] However, with the increasing demand for high-frequency cables, existing parallel biaxial copper cables are gradually becoming unable to meet the requirements due to the insulation degradation of the insulation material itself. In addition, since parallel biaxial copper cables use two copper conductors, their size, volume, and outer diameter are inevitably larger than those of single-core copper cables, which is not conducive to wiring and component processing.

[0004] In view of this, the present invention addresses the deficiencies of the prior art by conducting in-depth research and applying theoretical principles to solve the aforementioned problems, which is the objective of the present invention. Utility Model Content

[0005] The main objective of this invention is to effectively reduce the dielectric constant through the hollow channels in the core insulation layer, thereby improving the insulation performance of the dual-core cable and effectively reducing the volume and outer diameter of the dual-core cable.

[0006] To achieve the above objectives, this utility model provides a dual-core cable, comprising a pair of conductor cores, a core insulation layer, a shielding layer, and an outer sheath. The conductor cores are arranged parallel to each other and spaced apart. The core insulation layer seals around each conductor core. The core insulation layer has multiple hollow channels, each hollow channel being parallel to each other and surrounding each conductor core. The shielding layer surrounds the core insulation layer, and the outer sheath seals over the shielding layer.

[0007] In one embodiment of the present invention, the core insulation layer includes a pair of independent insulation layers, each independent insulation layer sealingly covering each conductor core wire, and each hollow channel being located within each independent insulation layer and coaxially surrounding the corresponding conductor core wire.

[0008] In one embodiment of the present invention, an insulating outer layer is further included, which sealably surrounds each individual insulating layer.

[0009] In one embodiment of this utility model, the insulating outer layer is made of PTFE or ePTFE.

[0010] In one embodiment of the present invention, the number of hollow channels in each independent insulating layer is three, four, five, six, seven, eight, nine, ten, eleven, or twelve.

[0011] In one embodiment of this utility model, the core insulation layer seals over each conductor core wire, and the hollow channels are arranged in an elliptical shape around each conductor core wire.

[0012] In one embodiment of the present invention, a shielding outer layer is further included, which surrounds the shielding layer, and the outer sheath sealably covers the shielding outer layer.

[0013] In one embodiment of the present invention, an insulating inner layer is further included, which seals over each conductor core wire. The core insulating layer seals over the insulating inner layer, so that each hollow channel is arranged in an elliptical shape around each conductor core wire.

[0014] In one embodiment of this utility model, the number of hollow channels is four, six, eight, ten, twelve, fourteen, sixteen, eighteen, or twenty.

[0015] In one embodiment of this utility model, the core insulation layer is composed of FEP, PE, or PP.

[0016] The present invention relates to a dual-core cable, which has multiple parallel hollow channels in the core insulation layer. The air in each hollow channel can effectively reduce the dielectric constant of the core insulation layer to improve the insulation performance of the dual-core cable, thereby effectively reducing the volume and outer diameter of the dual-core cable. Attached Figure Description

[0017] Figure 1 This is a partial perspective view of the first embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional schematic diagram of the first embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional schematic diagram of the second embodiment of the present invention;

[0020] Figure 4 This is a cross-sectional schematic diagram of the third embodiment of the present invention;

[0021] Figure 5 This is a cross-sectional schematic diagram of the fourth embodiment of the present invention;

[0022] In the attached figures, the following labels are used:

[0023] 10: Conductor core wire;

[0024] 20: Lotus root core insulation layer;

[0025] 21: Hollow channel;

[0026] 22: Independent insulation layer;

[0027] 30: Shielding layer;

[0028] 40: Outer sheath;

[0029] 50: Insulating outer layer;

[0030] 60: Drainage core wire;

[0031] 70: Outer shielding layer;

[0032] 80: Insulating inner layer. Detailed Implementation

[0033] In the description of this utility model, it should be understood that the terms "front side", "rear side", "left side", "right side", "front end", "rear end", "end", "longitudinal", "lateral", "vertical", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting conditions of this utility model.

[0034] Unless otherwise defined, the terms "substantially" and "approximately" are used to describe and narrate small changes. When combined with an event or situation, the term may include the exact moment the event or situation occurred, or an approximate point in time. For example, when combined with a numerical value, the term may include a range of variation less than or equal to ±10% of that value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, or less than or equal to ±0.05%.

[0035] The detailed description and technical content of this utility model will be explained below with reference to the accompanying drawings. However, the drawings are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0036] This utility model provides a two-core cable for use in communication transmission, data centers, information services, and other fields to meet the high-speed transmission and exchange of large-capacity audio, video, and image data signals. According to the applicant's tests, the two-core cable of this utility model can achieve a transmission frequency of 40GHz and above, and a transmission rate of 56Gbps. Please refer to [the relevant documentation / reference]. Figure 1 and Figure 2 The image shows the first embodiment of the dual-core cable of this utility model, which mainly includes a pair of conductor cores 10, a core insulation layer 20, a shielding layer 30, and an outer sheath 40.

[0037] The conductor cores 10 are substantially parallel to each other and spaced apart side-by-side. In this embodiment, the conductor cores 10 are nickel-plated copper wires, but this invention is not limited to this; for example, the conductor cores 10 can also be tin-plated copper wires, bare copper wires, alloy copper wires, copper stranded wires, copper-clad steel wires, silver-plated copper wires, etc. Each conductor core 10 serves the function of signal transmission.

[0038] The core insulation layer 20 seals around each conductor core 10. In this embodiment, the core insulation layer 20 is made of fluorinated ethylene propylene (FEP), but this invention is not limited thereto; for example, the core insulation layer 20 can also be made of polyethylene (PE) or polypropylene (PP). The core insulation layer 20 has a plurality of hollow channels 21, and therefore each hollow channel 21 contains air. The hollow channels 21 are substantially parallel to each other and are arranged around each conductor core 10. Therefore, since the dielectric constant of FEP is approximately 2.1 and the dielectric constant of air is approximately 1, the arrangement of the hollow channels 21 effectively reduces the overall dielectric constant of the core insulation layer 20 and improves the insulation performance. This reduces the required thickness of the core insulation layer 20, thereby effectively reducing the volume and outer diameter of the dual-core cable of this invention.

[0039] The shielding layer 30 surrounds the core insulation layer 20. In this embodiment, the shielding layer 30 is polypropylene aluminum foil, but this invention is not limited to this. For example, the shielding layer 30 can also be polyethylene terephthalate (PET) aluminum foil composite tape, copper foil tape, or copper-aluminum composite tape, etc. Thus, the shielding layer 30 can provide electromagnetic shielding, preventing the conductor cores 10 from being affected by external electromagnetic interference and thus preventing signal transmission. It also simultaneously improves the structural strength of the dual-core cable of this invention, making it less prone to deformation.

[0040] The outer sheath 40 seals over the shielding layer 30. In this embodiment, the outer sheath 40 is made of materials such as polyimide (PI), polyvinyl chloride (PVC), fluorinated ethylene propylene (FEP), polyethylene (PE), polypropylene (PP), polyether block amid (PEBA), or ethylene-tetrafluoroethylene (ETFE), but this invention is not limited to the above description. Therefore, because the outer sheath 40 has good mechanical properties, wear resistance, chemical corrosion resistance, and moisture resistance, it can effectively protect the inner shielding layer 30, the core insulation layer 20, and each conductor core 10, thereby ensuring the reliability and durability of the internal structure of the dual-core cable of this invention.

[0041] Further explanation: In this embodiment, the core insulation layer 20 includes a pair of independent insulation layers 22. Each independent insulation layer 22 sealably covers the outer surface of each conductor core 10, that is, each independent insulation layer 22 coaxially covers the outer periphery of the corresponding conductor core 10. Each hollow channel 21 is located within each independent insulation layer 22 and coaxially surrounds the corresponding conductor core 10. In other words, each hollow channel 21 in each independent insulation layer 22 is arranged in a circular shape, coaxially and symmetrically around the corresponding conductor core 10, thereby uniformly reducing the dielectric constant of the corresponding independent insulation layer 22 and improving the insulation performance. Furthermore, in each independent insulation layer 22, the number of hollow channels 21 is three, four, five, six, seven, eight, nine, ten, eleven, or twelve. In this embodiment, the number of hollow channels 21 in each independent insulating layer 22 is ten, thereby optimizing the reduction of dielectric constant and improving insulation performance without affecting structural strength and facilitating symmetrical arrangement, but the present invention is not limited thereto.

[0042] Furthermore, the dual-core cable in this embodiment also includes an outer insulating layer 50. The outer insulating layer 50 surrounds each individual insulating layer 22, and gaps exist between the outer insulating layer 50 and each individual insulating layer 22 to further reduce the dielectric constant and improve insulation performance. In this embodiment, the outer insulating layer 50 is made of polytetrafluoroethylene (PTFE) or expanded polytetrafluoroethylene (ePTFE), but this invention is not limited to these materials. It is worth mentioning that since the dielectric constant of PTFE and ePTFE is approximately 1.4, the outer insulating layer 50 in this embodiment can further improve the overall insulation performance without excessively increasing its thickness. However, if the thickness allows, the outer insulating layer 50 can still be made of the same FEP, PE, or PP as the core insulating layer 20. However, this invention is not limited to these materials; for example… Figure 3 In the second embodiment, the insulating outer layer 50 simultaneously and sealingly covers each individual insulating layer 22, thereby providing good protection and fixation for each individual insulating layer 22 and each conductor core wire 10. Therefore, the type of material and configuration of the insulating outer layer 50 can be adjusted according to different needs.

[0043] Further explanation: the dual-core cable of this utility model also includes at least one drain core wire 60. In this embodiment, the number of drain core wires 60 is two, but this utility model is not limited to this. For example, the number of drain core wires 60 can be only one or more, depending on the usage requirements. In this embodiment, the drain core wire 60 is a tin-plated copper round wire, but this utility model is not limited to this. For example, the drain core wire 60 can also be bare copper, gold copper, silver-plated copper, or a flat ground wire made of the aforementioned materials. The drain core wire 60 is disposed between the shielding layer 30 and the outer sheath 40. In this embodiment, each drain core wire 60 is located on the left and right sides of each conductor core wire 10, that is, each conductor core wire 10 is located between each drain core wire 60. However, this utility model is not limited to this. For example, each drain core wire 60 can also be located on the upper and lower sides of each conductor core wire 10. In this way, the drain core wire 60 can serve as grounding and tensile strength, and the contact surface between the shielding layer 30 and each drain core wire 60 is smooth and flat, and is not prone to wrinkles when covering the outer sheath 40.

[0044] Please continue reading. Figure 4The diagram shows the third embodiment of this utility model. The main difference between this embodiment and the first embodiment is that the core insulation layer 20 is not divided into two independent insulation layers 22. Instead, the core insulation layer 20 directly and sealingly covers each conductor core wire 10, and each hollow channel 21 is arranged in an elliptical shape around each conductor core wire 10. Therefore, compared to the first embodiment, since the core insulation layer 20 directly and sealingly covers each conductor core wire 10, it is not necessary to additionally provide an outer insulation layer 50 to fix each independent insulation layer 22 and each conductor core wire 10, thereby further reducing the thickness and shrinking the volume and outer diameter of the dual-core cable of this utility model. Furthermore, since each hollow channel 21 is arranged in an elliptical shape, the number of hollow channels 21 can be four, six, eight, ten, twelve, fourteen, sixteen, eighteen, or twenty for symmetrical configuration. In this embodiment, there are sixteen hollow channels 21, which can optimize the reduction of dielectric constant and improve insulation performance without affecting structural strength and facilitate symmetrical arrangement, but the present invention is not limited thereto.

[0045] To further explain, the dual-core cable in this embodiment also includes a shielding outer layer 70. The shielding outer layer 70 surrounds and covers the outer surface of the shielding layer 30, while the outer sheath 40 sealably covers the outer surface of the shielding outer layer 70. In other words, the shielding outer layer 70 is tightly wrapped between the shielding layer 30 and the outer sheath 40, thereby further and effectively increasing the shielding effect. The material used for the shielding outer layer 70 is the same as that used for the shielding layer 30, so it will not be described again here.

[0046] Please continue reading. Figure 5 The illustration shows the fourth embodiment of this utility model. Its main difference from the third embodiment is that it further includes an insulating inner layer 80 that covers and fixes each conductor core 10, while the core insulation layer 20 covers the outside of the insulating inner layer 80. More specifically, the insulating inner layer 80 directly and sealingly covers and fixes each conductor core 10, and then the core insulation layer 20 sealably covers the outer surface of the insulating inner layer 80, thereby causing each hollow channel 21 to be arranged in an elliptical shape around each conductor core 10. Therefore, since this embodiment first covers and fixes each conductor core 10 with the insulating inner layer 80, and then forms the core insulation layer 20 around the outer periphery of the insulating inner layer 80, it can effectively reduce the manufacturing difficulty and make the dual-core cable in this embodiment less prone to deformation during production.

[0047] The present invention relates to a dual-core cable, which has multiple parallel hollow channels 21 in the core insulation layer 20. Therefore, the air in each hollow channel 21 can effectively reduce the dielectric constant of the core insulation layer 20 to improve the insulation performance of the dual-core cable, thereby effectively reducing the volume and outer diameter of the dual-core cable.

[0048] In summary, the foregoing disclosure of this utility model is intended to enable those skilled in the art to clearly understand the technical content of this utility model and implement it accordingly, and is not intended to limit the scope of patent protection of this utility model. In addition, this utility model may have other embodiments not listed. Without departing from the spirit and essence of this utility model, those skilled in the art should be able to devise various corresponding changes and modifications based on this utility model, but all such changes and modifications should fall within the scope of protection of the patent application filed for this utility model.

Claims

1. A two-core cable, characterized in that, include: A pair of conductor cores, arranged parallel to each other and spaced apart; A core insulating layer is sealed around each of the conductor cores, the core insulating layer having a plurality of hollow channels, each of the hollow channels being parallel to each other and surrounding each of the conductor cores; A shielding layer surrounds the core insulation layer; and An outer sheath seals over the shielding layer.

2. The dual-core cable as described in claim 1, characterized in that, The core insulation layer includes a pair of independent insulation layers, each of which sealably covers each of the conductor cores, and each of the hollow channels is located within each of the independent insulation layers and coaxially surrounds the corresponding conductor core.

3. The dual-core cable as described in claim 2, characterized in that, It also includes an insulating outer layer that hermetically surrounds each of the individual insulating layers.

4. The dual-core cable as described in claim 3, characterized in that, The insulating outer layer is made of PTFE or ePTFE.

5. The dual-core cable as described in claim 2, characterized in that, In each of the aforementioned individual insulating layers, the number of hollow channels is three, four, five, six, seven, eight, nine, ten, eleven, or twelve.

6. The dual-core cable as described in claim 1, characterized in that, The core insulation layer seals over each conductor core, and the hollow channels are arranged in an elliptical shape around each conductor core.

7. The dual-core cable as claimed in claim 6, further comprising an outer shielding layer surrounding the shielding layer, the outer sheath sealingly covering the outer shielding layer.

8. The dual-core cable as described in claim 1, characterized in that, It also includes an insulating inner layer that seals over each of the conductor cores, and the core insulating layer that seals over the insulating inner layer so that the hollow channels are arranged in an elliptical shape around each of the conductor cores.

9. The dual-core cable as described in claim 6 or 8, characterized in that, The number of hollow channels can be four, six, eight, ten, twelve, fourteen, sixteen, eighteen, or twenty.

10. The dual-core cable as described in claim 1, characterized in that, The core insulation layer is made of FEP, PE or PP.

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