High-speed cable and cable unit structure thereof

Abstract

The utility model relates to a high speed cable and a cable unit structure thereof, the cable unit structure comprises two cable cores, a low dielectric material layer, an inner shielding layer and an outer wrapping layer, the two cable cores are arranged in parallel, each cable core comprises an inner conductor and an insulating layer wrapping the inner conductor, and the low dielectric material layer wraps the two cable cores in a wrapping mode; the inner shielding layer wraps the low dielectric material layer; the outer coating layer comprises an insulating rubber layer and a copper or aluminum layer, the outer coating layer coats the inner shielding layer in a manner that the copper or aluminum layer is arranged inside and the insulating rubber layer is arranged outside in a crossed manner, and the insulating rubber layer is formed by hot melt polyethylene terephthalate or a polypropylene tape layer. Therefore, the cable unit structure has the advantages of excellent structural strength, shielding of external electromagnetic signals and blocking of electromagnetic leakage.

Description

Technical Field

[0001] This utility model relates to a cable structure, and more particularly to a high-speed cable and its cable unit structure. Background Technology

[0002] Data transmission cables are an important carrier for data signal transmission and exchange. Therefore, with the continuous development of data networks, the research and development of cable products is also facing new technological changes and innovations. On the one hand, it is necessary to improve the transmission rate to meet the transmission and exchange of large-capacity information, and on the other hand, it is necessary to improve the transmission stability and enhance the quality of information transmission.

[0003] Among them, parallel biaxial copper cables in data transmission cables have advantages such as high speed, low latency, small size and low cost, and are widely used in communication transmission, data centers, information services and other fields to meet the high-speed transmission and exchange of large-capacity audio, video and video data signals.

[0004] The aforementioned parallel biaxial cable is composed of multiple sets of parallel unit structures. Each unit structure includes two parallel insulated single wires and an outer sheath and shielding layer covering the two insulated single wires. The outer sheath and shielding layer are used to shield external electromagnetic signals and also block electromagnetic leakage of the cable itself, which plays an important role in maintaining the stability of the transmission network.

[0005] However, traditional outer coatings only use a single layer of hot-melt polyethylene terephthalate or polypropylene tape, and shielding layers only use a single layer of aluminum foil or copper foil. However, the attenuation of single-layer aluminum foil shielding is relatively large, and single-layer hot-melt polyethylene terephthalate or polypropylene tape and single-layer copper foil have poor bending resistance and are easily damaged, thereby reducing the efficiency of shielding external electromagnetic signals and blocking electromagnetic leakage.

[0006] In view of this, the inventor has devoted himself to studying the above-mentioned prior art and applying theoretical principles to try his best to solve the above problems, which is the goal of the inventor's improvement. Summary of the Invention

[0007] This utility model provides a high-speed cable and its cable unit structure, which utilizes an outer sheath layer that is wrapped around the outer side of the inner shielding layer in a cross manner with a copper or aluminum layer inside and an insulating adhesive layer outside. The insulating adhesive layer is composed of a hot-melt polyethylene terephthalate or polypropylene tape layer, so as to achieve the cable unit structure with excellent structural strength, shielding of external electromagnetic signals and blocking of electromagnetic leakage efficiency.

[0008] In this embodiment of the present invention, a cable unit structure is provided, comprising: two cable cores arranged side by side, each cable core including an inner conductor and an insulating layer covering the outer surface of the inner conductor; a low dielectric material layer wrapped around the two cable cores; an inner shielding layer covering the low dielectric material layer; and an outer covering layer comprising an insulating adhesive layer and a copper or aluminum layer, the outer covering layer covering the outer surface of the inner shielding layer in a cross manner with the copper or aluminum layer inside and the insulating adhesive layer outside, the insulating adhesive layer being composed of a hot-melt polyethylene terephthalate or polypropylene tape layer.

[0009] In this embodiment of the present invention, a high-speed cable is provided, comprising at least two cable unit structures as described above.

[0010] Based on the above, this utility model adopts an outer covering layer that is wrapped around the inner shielding layer in a cross manner with a copper or aluminum layer on the inside and an insulating adhesive layer on the outside. The insulating adhesive layer is composed of hot-melt polyethylene terephthalate or polypropylene tape. The two cross insulating adhesive layers and the copper or aluminum layer can increase the structural strength and make it resistant to bending and not easily damaged. The copper or aluminum layer can reduce shielding attenuation, so as to achieve the cable unit structure with excellent structural strength and the efficiency of shielding external electromagnetic signals and blocking electromagnetic leakage. Attached Figure Description

[0011] Figure 1 This is a three-dimensional assembly diagram of the cable unit structure of this utility model.

[0012] Figure 2 This is a cross-sectional schematic diagram of the composite shielding layer of this utility model.

[0013] Figure 3 This is a cross-sectional schematic diagram of the first embodiment of the cable unit structure of this utility model.

[0014] Figure 4 This is a cross-sectional schematic diagram of the low dielectric material layer of this utility model wrapped around two cable cores.

[0015] Figure 5 This is a cross-sectional schematic diagram of the high-speed cable of this utility model.

[0016] Figure 6 This is a cross-sectional schematic diagram of another embodiment of the high-speed cable of this utility model.

[0017] Figure 7 This is a cross-sectional schematic diagram of the second embodiment of the cable unit structure of this utility model.

[0018] Figure 8 This is a cross-sectional schematic diagram of the third embodiment of the cable unit structure of this utility model.

[0019] Figure 9This is a cross-sectional schematic diagram of the fourth embodiment of the cable unit structure of this utility model.

[0020] Figure 10 This is a cross-sectional schematic diagram of the fifth embodiment of the cable unit structure of this utility model.

[0021] Figure 11 This is a cross-sectional schematic diagram of the sixth embodiment of the cable unit structure of this utility model.

[0022] Figure 12 This is a cross-sectional schematic diagram of the seventh embodiment of the cable unit structure of this utility model.

[0023] The attached figures are labeled as follows:

[0024] 10: Cable Unit Structure 1: Cable Core

[0025] 11: Inner conductor; 12: Insulating layer

[0026] 2: Low dielectric material layer; 3: Inner shielding layer

[0027] 31: Composite shielding layer; 311: Hot melt adhesive layer

[0028] 312: Copper or aluminum layer; 313: Conductive adhesive layer

[0029] 34: Aluminum layer 4: Outer cladding layer

[0030] 41: Insulating adhesive layer; 42: Copper or aluminum layer

[0031] 5: Drainage line 51: Cylindrical conductor

[0032] 52: Flat conductor; 6: Outer shielding layer

[0033] 7: Braided layer 8: Outer layer

[0034] A: First wrapping layer B: Second wrapping layer

[0035] S: Filler Detailed Implementation

[0036] The detailed description and technical content of this utility model will be explained in conjunction with the accompanying drawings. However, the accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0037] Please refer to Figures 1 to 5 As shown, the present invention provides a first embodiment of a high-speed cable and its cable unit structure. The high-speed cable mainly includes two or more cable unit structures 10. The cable unit structure 10 mainly includes two cable cores 1, a low dielectric material layer 2, an inner shielding layer 3, and two outer covering layers 4.

[0038] like Figure 1 , Figures 3 to 4 As shown, the two cable cores 1 are arranged side by side on the left and right. Each cable core 1 includes an inner conductor 11 and an insulation layer 12 that is extruded and wrapped around the inner conductor 11. The low dielectric material layer 2 is wrapped around the two cable cores 1 by a high-speed wrapping device.

[0039] Detailed explanation is as follows, such as Figure 4 As shown, the wrapping overlap rate of the low dielectric material layer 2 is between 40% and 70%, that is, the low dielectric material layer 2 located on the upper layer covers 40% to 70% of the width of the low dielectric material layer 2 located on the lower layer, and the low dielectric material layer 2 is wrapped and overlapped by 2 or 3 layers to ensure that the appearance of the cable unit structure 10 is flat. The low dielectric material layer 2 is made of expanded polytetrafluoroethylene (ePTFE) or polytetrafluoroethylene (PTFE), and the thickness of the low dielectric material layer 2 is between 0.02 and 0.12 mm.

[0040] In addition, the dielectric constant of conventional PTFE material is 2.1, while that of ePTFE material can reach 1.4, which significantly reduces the dielectric constant of the wrapping tape. This also results in the cable unit structure 10 being smaller than the conventional size, with better attenuation performance and a softer cable.

[0041] like Figures 1 to 4 As shown, the inner shielding layer 3 covers the low dielectric material layer 2. In this embodiment, the inner shielding layer 3 is a composite shielding layer 31. The composite shielding layer 31 covers the low dielectric material layer 2 in a longitudinal wrapping manner with concentric circles. The composite shielding layer 31 is composed of a hot melt adhesive layer 311, a copper or aluminum layer 312, a conductive adhesive layer 313 and an aluminum layer 314 sequentially stacked in the direction away from the low dielectric material layer 2. The longitudinal wrapping method of the composite shielding layer 31 can support a larger bandwidth than the existing wrapping method. The longitudinal wrapping bandwidth of the composite shielding layer 31 of this utility model can reach more than 40 GHz.

[0042] However, the inner shielding layer 3 is not limited to the composite shielding layer 31. The inner shielding layer 3 can also be a copper or aluminum layer (not shown in the figure), which is wrapped around the low dielectric material layer in a concentric circle longitudinal wrapping manner; or, the inner shielding layer 3 can also contain two copper or aluminum layers (not shown in the figure), one of which is wrapped around the low dielectric material layer 2 in a concentric circle longitudinal wrapping manner, and the other copper or aluminum layer is wrapped around the first copper or aluminum layer in a wrapping manner to make the structure more compact.

[0043] like Figure 1As shown, the outer covering layer 4 includes an insulating adhesive layer 41 and a copper or aluminum layer 42. The insulating adhesive layer 41 is composed of a hot-melt polyethylene terephthalate (PET) or polypropylene (PP) tape layer. The outer covering layer 4 covers the inner shielding layer 3 in a cross manner with the copper or aluminum layer 42 inside and the insulating adhesive layer 41 outside. The overlap rate of the two layers of cross-covering is more than 25%, that is, the insulating adhesive layer 41 located on the upper layer covers more than 25% of the copper or aluminum layer 42 located on the lower layer.

[0044] like Figure 3 As shown, the cable unit structure 10 of this utility model also includes one or more drainage lines 5. In this embodiment, there are two drainage lines 5. Each drainage line 5 is a cylindrical conductor 51 with a circular cross-section. The two drainage lines 5 are sandwiched between the inner shielding layer 3 and the outer covering layer 4 and are arranged on the left and right sides of the two cable cores 1 arranged side by side.

[0045] The details are as follows: the drain line 5 is used for grounding. The contact surface between the inner shielding layer 3 and the drain line 5 is smooth and flat, so that wrinkles are not easily generated on the contact surface between the inner shielding layer 3 and the drain line 5 when the cable unit structure 10 is wrapped with an outer sheath, so that the shielding effect of the inner shielding layer 3 is not affected. The drain line 5 mainly serves the functions of grounding and tensile strength. Under good and correct grounding conditions, the inner shielding layer 3 can block the electromagnetic leakage of the cable itself and shield external electromagnetic signals, so that the cable unit structure 10 of this utility model can achieve a comprehensive shielding effect for internal and external signals.

[0046] The inner conductor 11 can be made of bare copper, plated copper, or plated alloy copper. The insulating layer 12 is made of fluoroplastic or polyolefin materials, including but not limited to fluorinated ethylene propylene (FEP), foamed fluoroplastic, polyethylene (PE), and foamed PE. The drain line 5 is made of bare copper wire, plated copper wire, or alloy copper wire.

[0047] like Figure 5 The diagram shown is a cross-sectional view of the high-speed cable of this utility model. In this embodiment, the cable unit structure 10 consists of two layers arranged side-by-side. The high-speed cable further includes a first wrapping layer A, an outer shielding layer 6, a braided layer 7, an outer layer 8, and two fillers S. The first wrapping layer A, outer shielding layer 6, braided layer 7, and outer layer 8 sequentially wrap around the two cable unit structures 10 from the inside out. The two fillers S are sandwiched between the two cable unit structures 10 and the first wrapping layer A, thereby making the high-speed cable structure compact and its appearance rounded.

[0048] The first wrapping layer A is a protective layer, which is composed of polyester tape, PP tape, non-woven fabric, and PI tape. The outer shielding layer 6 is composed of aluminum foil, copper foil, and copper-aluminum composite tape, and the metal surface of the outer shielding layer 6 is arranged outward, that is, the metal surface of the outer shielding layer 6 is arranged away from the second cable core 1. The braided layer 7 is made of tinned copper wire, aluminum-magnesium wire, or tinned copper-clad steel wire. The outer layer 8 is a sheath layer, which is made of plastic material extrusion such as PVC extrusion, LSZH extrusion, TPE extrusion, TPU extrusion, etc., or woven with PET filaments. The filler S is cotton thread or PP hemp. The filler S is used to make the cable unit structure 10 round in shape, so the filler S can also be omitted as appropriate.

[0049] Therefore, traditional outer sheathing layers only use a single layer of hot-melt polyethylene terephthalate or polypropylene tape, but this single layer of hot-melt polyethylene terephthalate or polypropylene tape has poor bending resistance and is easily damaged. In contrast, this utility model uses an outer sheathing layer 4 that crosses a copper or aluminum layer 42 inside with an insulating adhesive layer 41 outside, covering the inner shielding layer 3. The insulating adhesive layer 41 is composed of hot-melt polyethylene terephthalate or polypropylene tape. The two cross insulating adhesive layers 41 and copper or aluminum layer 42 can increase structural strength and bend resistance, making it less prone to damage. The copper or aluminum layer 42 can reduce shielding attenuation, so that the cable unit structure 10 has excellent structural strength and the efficiency of shielding external electromagnetic signals and blocking electromagnetic leakage.

[0050] In addition, traditional shielding layers use only a single layer of aluminum foil or a single layer of copper foil. However, the attenuation of single-layer aluminum foil shielding is relatively large, and single-layer copper foil has poor bending resistance and is easily damaged. In contrast, when the inner shielding layer 3 of this utility model is a composite shielding layer 31, the composite shielding layer 31 is composed of a hot melt adhesive layer 311, a copper or aluminum layer 312, a conductive adhesive layer 313, and an aluminum layer 314 stacked sequentially in the direction away from the low dielectric material layer 2. The conductive adhesive layer 313 mainly allows the double copper or aluminum layer 312 to bond with the aluminum layer 314, so as to realize the conduction of the two metal layers of copper or aluminum layer 312 and aluminum layer 314. The double copper or aluminum layer 312 and aluminum layer 314 can reduce shielding attenuation and increase structural strength, making them resistant to bending and not easily damaged. The hot melt adhesive layer 311 can also increase structural strength, making them resistant to bending and not easily damaged, so as to achieve that the cable unit structure 10 has excellent structural strength and the efficiency of shielding external electromagnetic signals and blocking electromagnetic leakage.

[0051] like Figure 6 The image shows another embodiment of the high-speed cable of this utility model. Figure 6 Implementation examples and Figures 1 to 5 The embodiments are largely the same. Figure 6 Implementation examples and Figures 1 to 5The embodiment differs in that the high-speed cable further includes a first wrapping layer A, a second wrapping layer B, an outer shielding layer 6, a braided layer 7, an outer layer 8, and two fillers S, and the number of cable unit structures 10 is eight.

[0052] Further explanation is as follows: In this embodiment, the two cable unit structures 10 are arranged side by side, one above the other. The first wrapping layer A covers the outside of the second cable unit structure 10. The remaining six cable unit structures 10 are equidistantly surrounding the second cable unit structure 10 and the first wrapping layer A. The second wrapping layer B, the outer shielding layer 6, the braided layer 7, and the outer layer 8 are sequentially wrapped around the outside of the eighth cable unit structure 10 from the inside out. Two fillers S are sandwiched between the second cable unit structure 10 and the first wrapping layer A, thereby making the high-speed cable structure compact and its appearance round. The second wrapping layer B, like the first wrapping layer A, is a protective layer. The second wrapping layer B is composed of polyester tape, PP tape, non-woven fabric, and PI tape materials.

[0053] like Figures 7 to 8 The figures shown are the second and third embodiments of the cable unit structure 10 of this utility model. Figures 7 to 8 The second and third embodiments and Figures 1 to 4 The first embodiment is largely the same. Figures 7 to 8 The second and third embodiments and Figures 1 to 4 The first embodiment differs in that the cylindrical conductor 51 is positioned differently.

[0054] The details are as follows: In the second embodiment, the number of drain lines 5 is one, that is, the number of cylindrical conductors 51 is one. The cylindrical conductors 51 are sandwiched between the inner shielding layer 3 and the outer covering layer 4 and are arranged on the upper side of the two cable cores 1 arranged side by side on the left and right. In the third embodiment, the number of drain lines 5 is two, that is, the number of cylindrical conductors 51 is two. The cylindrical conductors 51 are sandwiched between the inner shielding layer 3 and the outer covering layer 4 and are arranged on the upper and lower sides of the two cable cores 1 arranged side by side on the left and right.

[0055] like Figures 9 to 12 The figures shown are the fourth, fifth, sixth, and seventh embodiments of the cable unit structure 10 of this utility model. Figures 9 to 12 The fourth, fifth, sixth, and seventh embodiments and Figures 1 to 4 The first embodiment is largely the same. Figures 9 to 12 The fourth, fifth, sixth, and seventh embodiments and Figures 1 to 4 The first embodiment differs in that the drain line 5 is a flat conductor 52 with a flat cross-section.

[0056] Further explanation is as follows: In the fourth embodiment, the number of drain lines 5 is one, that is, the number of flat conductors 52 is one. The flat conductors 52 are sandwiched between the inner shielding layer 3 and the outer sheathing layer 4 and are arranged on the upper side of the two cable cores 1 arranged side by side on the left and right. In the fifth embodiment, the number of drain lines 5 is two, that is, the number of flat conductors 52 is two. The flat conductors 52 are sandwiched between the inner shielding layer 3 and the outer sheathing layer 4 and are arranged on the upper and lower sides of the two cable cores 1 arranged side by side on the left and right. In the sixth embodiment, the number of drain lines 5 is one, that is, the number of flat conductors 52 is one. The flat conductors 52 are sandwiched between the low dielectric material layer 2 and the inner shielding layer 3 and are arranged on the upper side of the two cable cores 1 arranged side by side on the left and right. The flat conductors 52 have a smaller volume than the cylindrical conductors 51, which is beneficial to reducing the outer diameter of the cable unit structure 10.

[0057] like Figure 12 The image shown is the seventh embodiment of the cable unit structure 10 of this utility model. Figure 12 The seventh embodiment and Figures 1 to 4 The first embodiment is largely the same. Figure 12 The seventh embodiment and Figures 1 to 4 The difference in the first embodiment is that the number of drain lines 5 is zero. Since the inner shielding layer 3 in this embodiment is a composite shielding layer 31, the aluminum layer 314 itself is located on the outermost edge of the inner shielding layer 3 and sandwiched between the inner shielding layer 3 and the outer covering layer 4, so that the aluminum layer 314 can be directly grounded and replace the drain line 5. Similarly, when the inner shielding layer 3 is one or more copper or aluminum layers, the copper or aluminum layers can also be directly grounded and replace the drain line 5.

[0058] In conclusion, the high-speed cable and its cable unit structure of this utility model can indeed achieve the intended use purpose, solve the deficiencies of the prior art, and have industrial applicability, novelty and progress. It fully meets the requirements for patent application, and therefore, this application is filed in accordance with the Patent Law to protect the inventor's rights.

Claims

1. A cable unit structure, characterized by, Comprising: Two cable cores arranged side by side, each of the cable cores comprising an inner conductor and an insulating layer wrapped around the inner conductor: A low dielectric material layer wrapped around the two cable cores; An inner shielding layer wrapped around the low dielectric material layer; and An outer wrapping layer comprising an insulating glue layer and a copper or aluminum layer, the outer wrapping layer wrapped around the inner shielding layer with the copper or aluminum layer inside and the insulating glue layer outside, the insulating glue layer composed of a hot melt polyethylene terephthalate or polypropylene tape layer. The inner shielding layer is a composite shielding layer wrapped around the low dielectric material layer in a longitudinal wrapping manner with concentric circles, the composite shielding layer composed of a hot melt glue layer, a copper or aluminum layer, a conductive glue layer, and an aluminum layer stacked in order from the direction away from the low dielectric material layer, the longitudinal wrapping bandwidth of the composite shielding layer reaching more than 40 GHz.

2. The cable unit structure of claim 1, wherein, The inner shielding layer is a copper or aluminum layer wrapped around the low dielectric material layer in a longitudinal wrapping manner with concentric circles.

3. The cable unit structure of claim 1, wherein, The inner shielding layer comprises two copper or aluminum layers, one of the copper or aluminum layers wrapped around the low dielectric material layer in a longitudinal wrapping manner with concentric circles, and the other copper or aluminum layer wrapped around the one copper or aluminum layer.

4. The cable unit structure of claim 1, wherein, The two-layer overlapping rate of the copper or aluminum layer inside and the insulating glue layer outside is more than 25%.

5. The cable unit structure of claim 1, wherein, The wrapping overlapping rate of the low dielectric material layer is between 40% and 70%, and the thickness of the low dielectric material layer is between 0.02 and 0.12 mm.

6. The cable unit structure of claim 1, wherein, Further comprising at least one drain wire sandwiched between the inner shielding layer and the outer wrapping layer, or sandwiched between the low dielectric material layer and the inner shielding layer, the drain wire being a cylindrical conductor or a flat conductor.

7. The cable unit structure of claim 1, wherein, The low dielectric material layer is composed of stretchable Teflon or polytetrafluoroethylene.

8. The cable unit structure of claim 1, wherein, Comprising:

9. A high speed cable, characterized by At least two cable unit structures according to any one of claims 1 to 8. Further comprising a first wrapping layer, an outer shielding layer, a braided layer, an outer layer, and two fillers, the number of cable unit structures being two and arranged side by side above and below each other, the first wrapping layer, the outer shielding layer, the braided layer, and the outer layer wrapped around the two cable unit structures from inside to outside in order, and the two fillers sandwiched between the two cable unit structures and the first wrapping layer.

10. The high speed cable of claim 9, wherein, Further comprising a first wrapping layer, a second wrapping layer, an outer shielding layer, a braided layer, an outer layer, and two fillers, the number of cable unit structures being eight, two of the cable unit structures arranged side by side above and below each other, the first wrapping layer wrapped around the two cable unit structures, the remaining six cable unit structures equally surrounding the two cable unit structures and the first wrapping layer outside, the second wrapping layer, the outer shielding layer, the braided layer, and the outer layer wrapped around the eight cable unit structures from inside to outside in order, and the two fillers sandwiched between the two cable unit structures and the first wrapping layer.

11. The high speed cable of claim 9, wherein, ​

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