Cables

Abstract

The present application relates to a cable, which comprises a core wire, a first shielding layer covering the core wire, a second shielding layer covering the first shielding layer, and an outer sheath covering the second shielding layer, the first shielding layer covers the core wire longitudinally, the first shielding layer has at least two parts, different parts are spaced apart from each other to form adjacent parts, the second shielding layer comprises a plurality of parts, the plurality of parts of the second shielding layer cover the corresponding adjacent parts, and the width of each part of the second shielding layer is greater than the width of the corresponding adjacent part, so that when the cable is bent, each part of the second shielding layer can still cover and shield the corresponding adjacent part. The cable of the present application has good shielding effect and good bending resistance.

Description

Technical Field

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

[0002] Please refer to U.S. Patent Application No. 20210296026, which discloses a cable comprising a pair of core wires, a first shielding layer covering the pair of core wires, and a second shielding layer covering the first shielding layer. The first shielding layer is a pure metal strip, and the second shielding layer is AL / PET (aluminum foil strip) or Cu / PET (copper foil strip). Both the first and second shielding layers are wrapped longitudinally, resulting in poor bending resistance of the cable. The second shielding layer is a metal foil tape comprising a PET layer and a metal layer, with the PET layer sandwiched between the two metal layers. The PET Mylar layer between the two metal surfaces affects the shielding performance of the cable.

[0003] Therefore, it is necessary to provide a cable that has good shielding and is easy to bend. Summary of the Invention

[0004] The main objective of this invention is to provide a cable with good shielding effect and good bending resistance.

[0005] To achieve the above objectives, the present invention can adopt the following technical solution: a cable, comprising a core wire, a first shielding layer covering the core wire, a second shielding layer covering the first shielding layer, and an outer sheath covering the second shielding layer. The first shielding layer longitudinally covers the core wire and has at least two parts, with different parts spaced apart from each other to form adjacent portions. The second shielding layer comprises multiple parts, with the multiple parts of the second shielding layer covering the corresponding adjacent portions. The width of each part of the second shielding layer is greater than the width of the corresponding adjacent portion, so that when the cable is bent, each part of the second shielding layer can still cover and shield the corresponding adjacent portion.

[0006] To achieve the above objectives, the present invention may also adopt the following technical solution: a cable, comprising a core wire, a first shielding layer covering the core wire, a second shielding layer covering the first shielding layer, and an outer sheath covering the second shielding layer. The first shielding layer longitudinally covers the core wire, and the two ends of the first shielding layer form adjacent portions. The adjacent portions of the first shielding layer do not overlap. The second shielding layer covers the adjacent portions of the first shielding layer, and the width of the second shielding layer is greater than the width of the adjacent portions, so that when the cable is bent, the adjacent portions of the first shielding layer do not slip out of the coverage of the second shielding layer.

[0007] Compared with the prior art, the present invention has the following beneficial effects: the first shielding layer of the cable of the present invention forms an adjacent portion, the second shielding layer covers the adjacent portion, and the width of the second shielding layer is greater than the size of the adjacent portion, so that when the cable is bent, the second shielding layer can still cover and shield the adjacent portion. The cable of the present invention has better bending resistance and better shielding effect. Attached Figure Description

[0008] Figure 1 This is a cross-sectional view of the first embodiment of the cable conforming to the present invention.

[0009] Figure 2 This is a cross-sectional view of a second embodiment of the cable conforming to the present invention.

[0010] Figure 3 This is a cross-sectional view of a third embodiment of the cable conforming to the present invention.

[0011] Figure 4 This is a cross-sectional view of the fourth embodiment of the cable conforming to the present invention.

[0012] Figure 5 This is a cross-sectional view of the fifth embodiment of the cable conforming to the present invention.

[0013] Figure 6 This is a cross-sectional view of the sixth embodiment of the cable conforming to the present invention.

[0014] Figure 7 This is a cross-sectional view of the seventh embodiment of the cable conforming to the present invention.

[0015] Component symbol explanation: Cables 100, 200, 300, 400, 500, 600, 700 Core wire 10, 20, 60 Inner conductors 101, 301, 601 Inner insulation layer 102, 302, 402, 502, 602 Shielding layer 63 Inner core wires 11, 21, 31 Sheaths 12, 22, 32, 42, 52 First shielding layer 130, 630, 730 Part 1, 131, 631 Part Two, 132,632 Openings 133, 633, 673 outer skin 15 Second shielding layer 170, 670, 770 Part Three 671 Part Four 672 Air gap 112 Connecting part 305. Detailed Implementation

[0016] Please see Figure 1 The diagram illustrates a first embodiment of the cable 100 conforming to the present invention. The cable 100 includes a core wire 10, a shielding layer covering the core wire 10, and an outer sheath 15 covering the shielding layer. The shielding layer includes a first shielding layer 130 and a second shielding layer 170 disposed outside the first shielding layer 130.

[0017] The first shielding layer 130 longitudinally covers the core wire 10. The first shielding layer 130 comprises at least two parts. Adjacent ends of two adjacent parts form adjacent portions. The first shielding layer 130 does not overlap in the adjacent portions, but instead forms openings 133 or seams. Specifically, in this embodiment, the adjacent portions form openings 133. Each opening 133 extends along the longitudinal direction of the core wire 10. The number of openings 133 depends on the number of components of the first shielding layer 130. The second shielding layer 170 covers the openings 133. Specifically, in this embodiment, the second shielding layer 170 also comprises multiple parts, the number of components of the second shielding layer 170 being the same as the number of openings 133, and the second shielding layer 170 covers each of the openings 133 respectively. The second shielding layers 170 covering different openings 133 do not contact each other. The width of each of the second shielding layers 170 is greater than the size of the corresponding opening 133, so that when the cable 100 is bent, the second shielding layer 170 can still cover and shield the opening 133, so that the opening 133 does not slip out of the coverage of the second shielding layer 170.

[0018] In this embodiment, the cable 100 is a biaxial cable. The core wire 10 includes a pair of inner core wires 11 and an insulating sheath 12 covering the inner core wires 11. The pair of inner core wires 11 are arranged side-by-side in the transverse direction to form a generally flat cable 100. The surfaces of the pair of inner core wires 11 are in contact with each other and extend parallel in the longitudinal direction. Each inner core wire 11 includes an inner conductor 101 and an inner insulation layer 102 that is extruded and covers the inner conductor 101. The inner conductor 101 is used to transmit high-speed signals. The cross-sectional shape of each inner core wire 11 is circular. The cross-sectional shape of the sheath 12 is semi-circular on both sides in the transverse direction. Air gaps 112 are formed on the upper and lower sides between the sheath 12 and the two inner core wires 11. Both the inner insulation layer 102 and the sheath 12 are made of solid material. The outer surface of the sheath 12 is smooth and flat.

[0019] Specifically, in this embodiment, the first shielding layer 130 includes two parts, namely a first part 131 and a second part 132. The first part 131 and the second part 132 are symmetrically and longitudinally attached to the core wire 10 from the left and right sides, respectively, leaving two openings 133 at the top and bottom adjacent to the first part 131 and the second part 132. The two openings 133 are located at the middle position of the top and bottom sides in the transverse direction. The second shielding layer 170 is located between the first shielding layer and the outer sheath 15. The second shielding layer 170 includes a third part covering the upper opening 133 of the core wire 10 and a fourth part covering the lower opening 133 of the core wire 10. The dimensions of the third part and the fourth part extending along the outer periphery of the cable 100 are larger than the dimensions of the corresponding openings 133. The width of each part of the second shielding layer 170 can extend to the semi-circular boundary on both sides in the transverse direction. The third part and the fourth part are respectively arranged in a straight line. The third part and the fourth part do not contact each other.

[0020] The first shielding layer 130 is conductive Mylar metal, comprising a base layer and a metal layer disposed on the base layer. The metal layer faces outward. The second shielding layer 170 is made of pure metal or an alloy. The third and fourth portions of the second shielding layer 170 are in direct contact with the outer surfaces of the first portion 131 and the second portion 132 of the first shielding layer 130. The second shielding layer 170 can serve as a ground wire for grounding. The material of the second shielding layer 170 can be selected from metals with excellent solderability to facilitate soldering during subsequent assembly of the cable 100. The outer sheath 15 is heat-bonded Mylar. The outer sheath 15 can be one or more layers.

[0021] The cable 100 of the present invention has openings 133 at both the top and bottom of the first shielding layer 130. The third and fourth portions of the second shielding layer 170 are symmetrically attached to the openings 133 on the top and bottom sides from the top and bottom. Finally, the second shielding layer 170 is covered and fixed with an outer sheath 15. The metal contact surfaces of the second shielding layer 170 and the first shielding layer 130 can slide relative to each other, thereby enhancing the flexibility and bending resistance of the cable 100. The cable 100 of the present invention can be bent at more than 90 degrees. The second shielding layer 170 is made of pure metal foil or alloy, which has better shielding performance. Compared with the traditional longitudinal covering structure of the shielding layer, a layer of adhesive Mylar is sandwiched between the two metal surfaces in the overlapping part of the shielding layer. The metal surfaces of the first shielding layer 130 and the second shielding layer 170 of the cable 100 of the present invention are in direct contact. There are no non-metallic layers between the first shielding layer 130 and the second shielding layer 170, so that the first shielding layer 130 and the second shielding layer 170 together form a complete and tight metal shield outside the sheath 12, which plays a crucial role in controlling signal interference and noise. Compared to the traditional all-overlay structure of pure metal foil, the cable 100 of this invention has significantly improved bending resistance and oxidation resistance.

[0022] Please see Figure 2 The image shows a second embodiment of the cable 200 conforming to the present invention. Compared with the first embodiment, in this embodiment, there is no air gap between the inner core wire 21 and the sheath 22 of the core wire 20.

[0023] Please see Figure 3 The image shows a third embodiment of the cable 300 conforming to the present invention. Compared with the first embodiment, in this embodiment, the inner insulation layer 302 of the inner core wire 31 is jointly extruded and formed outside the pair of inner conductors 301. The inner core wire 31 forms a horizontal figure-eight structure. The inner insulation layer 302 has a connecting portion 305 in the middle part of the pair of inner conductors 301. There is no air gap between the sheath 32 and the inner core wire 31.

[0024] Please see Figure 4 The image shows a fourth embodiment of the cable 400 conforming to the present invention. Compared with the first embodiment, in this embodiment, the inner insulation layer 402 is formed of foamed material, and the insulating sheath 42 is formed of solid material.

[0025] Please see Figure 5 The image shows a fifth embodiment of the cable 500 conforming to the present invention. Compared with the second embodiment, in this embodiment, the inner insulation layer 502 is formed of foamed material, and the insulating sheath 52 is formed of solid material.

[0026] Please see Figure 6The image shows a sixth embodiment of the cable 600 conforming to the present invention. Compared with the first embodiment, in this embodiment, the cable 600 is a single-core coaxial cable with only one inner conductor 601. The inner insulation layer 602 is extruded and formed outside the inner conductor 601, and no sheath is provided in this embodiment. The first portion 631 and the second portion 632 of the first shielding layer 630 of the shielding layer 63 partially enclose the circular core wire 60 from the left and right sides, and have openings 633 on both the top and bottom sides. The third portion 671 and the fourth portion 672 of the second shielding layer 670 partially enclose the first shielding layer 630 from the top and bottom sides, and have openings 673 on both the left and right sides. The maximum width of the second shielding layer 670 can extend to the circumference of a semicircle. A first connecting line L1 is formed between the two openings 633 of the first portion 631 and the second portion 632, and a second connecting line L2 is formed between the two openings 673 of the third portion 631 and the fourth portion 672. The first portion 631 and the second portion 632 are symmetrically arranged along the first connecting line L1, and the third portion 671 and the fourth portion 672 are symmetrically arranged along the second connecting line L2. The included angle between the first connecting line L1 and the second connecting line L2 is 0-180 degrees. In this embodiment, the included angle between the first connecting line L1 and the second connecting line L2 is 90 degrees. Both the first connecting line L1 and the second connecting line L2 pass through the center of the core wire 60. Compared with the traditional braiding and winding shielding method of coaxial cables, this novel structure cable 600 can effectively reduce crosstalk and improve wire performance.

[0027] Please see Figure 7 The image shows a seventh embodiment of the cable 700 conforming to the present invention. Compared with the first embodiment, in this embodiment, the second shielding layer 770 is disposed inside the first shielding layer 730, and the metal surface of the first shielding layer 730 faces the second shielding layer 770. Everything else remains unchanged. Furthermore, in cables of the second to sixth embodiments other than the cable of the first embodiment, the second shielding layer may also be disposed inside the first shielding layer.

[0028] The first shielding layer 130 of the cable 100 of the present invention longitudinally covers the core wire 10, and the first shielding layer 130 has a plurality of openings 133 extending along the longitudinal direction of the cable 100. A second shielding layer 170 made of pure metal covers each of the openings 133, thereby making the cable 100 of the present invention have good bending resistance and shielding effect. The cable 100 of the present invention has high-speed data transmission capability at signal frequencies of 224 GHz and above.

[0029] However, it is understood that although many features and advantages of the invention have been mentioned in the foregoing description, including some structural and functional details, the invention is illustrative only, and many details are subject to change, particularly in the shape, size, and arrangement of components within the scope of the principles as indicated by the broad general meaning of the terms set forth in the appended claims.

Claims

1. A cable comprising a core wire, a first shielding layer covering the core wire, a second shielding layer covering the first shielding layer, and an outer sheath covering the second shielding layer, wherein the first shielding layer longitudinally covers the core wire, characterized in that: The first shielding layer has at least two parts, which are spaced apart from each other to form adjacent parts. The second shielding layer includes multiple parts, which cover the corresponding adjacent parts. The width of each part of the second shielding layer is greater than the width of the corresponding adjacent part, so that when the cable is bent, each part of the second shielding layer can still cover and shield the corresponding adjacent part.

2. The cable as described in claim 1, characterized in that: The second shielding layer is a pure metal foil made of pure metal or alloy material. The first shielding layer includes a base layer and a metal layer disposed on the base layer, with the metal layer facing the second shielding layer.

3. The cable as described in claim 1, characterized in that: The different portions of the first shielding layer do not overlap in adjacent portions, but form openings or seams, and the portions of the second shielding layer do not contact each other.

4. The cable as described in claim 1, characterized in that: The first shielding layer includes a first part and a second part, and the second shielding layer includes a third part and a fourth part. The first part and the second part are symmetrically arranged along a first connecting line, and the third part and the fourth part are symmetrically arranged along a second connecting line. The angle between the first connecting line and the second connecting line is 0-180 degrees.

5. The cable as described in claim 4, characterized in that: The first connecting line is set perpendicular to the second connecting line.

6. The cable as described in claim 3, characterized in that: The core wire includes an inner core wire and an insulating sheath covering the inner core wire. The inner core wire includes a pair of spaced-apart inner conductors and an inner insulating layer covering the inner conductors. The cross-sectional shape of the sheath is semi-circular on both sides in the lateral direction. The adjacent portion is located in the middle of the two semi-circles in the lateral direction. The width of the second shielding layer can extend to the boundary of the semi-circles on both sides in the lateral direction.

7. A cable comprising a core wire, a first shielding layer covering the core wire, a second shielding layer covering the first shielding layer, and an outer sheath covering the second shielding layer, wherein the first shielding layer longitudinally covers the core wire, and adjacent portions are formed at both ends of the first shielding layer, characterized in that: The adjacent portions of the first shielding layer do not overlap, and the second shielding layer covers the adjacent portions of the first shielding layer. The width of the second shielding layer is greater than the width of the adjacent portions, so that when the cable is bent, the adjacent portions of the first shielding layer do not slip out of the coverage of the second shielding layer.

8. The cable as described in claim 7, characterized in that: The first shielding layer includes multiple independent parts, and the adjacent ends of two adjacent parts form the adjacent portion, which is an opening or a seam. The second shielding layer includes multiple parts, and the parts of the second shielding layer covering different adjacent portions do not contact each other.

9. The cable as described in claim 8, characterized in that: The first shielding layer includes a first part and a second part arranged symmetrically, and the second shielding layer includes a third part and a fourth part arranged symmetrically. The first part and the second part symmetrically cover the core wire from the left and right sides, respectively, and the third part and the fourth part symmetrically cover the outside of the first shielding layer from the top and bottom sides.

10. The cable as described in claim 7, characterized in that: The core wire is a single-core wire or a dual-core wire.

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