Cable

Abstract

The utility model discloses a cable, which comprises a plurality of core wire groups, the core wire groups are arranged along the transverse direction, each core wire group comprises a pair of inner conductors and an inner insulating layer coated outside the inner conductors, and the cable further comprises two shielding layers, the shielding layer wraps the core wire groups from the upper side and the lower side perpendicular to the transverse direction, and the inner insulating layer comprises a first insulating layer wrapping the corresponding inner conductor and a second insulating layer wrapping the first insulating layer. The cable provided by the utility model is not only good in electrical property, but also convenient for integral assembly and welding of the cable.

Description

Technical Field

[0001] The utility model relates to a cable, especially a cable with good electrical performance and capable of being integrally terminated.

Background Art

[0002] With the development and popularization of electronic technology products, cables, as a tool for transmitting signals, are widely used in fields such as household appliances, instruments and meters, automation equipment, data centers, servers, switches, cloud computing, and 5G. However, during the signal transmission process, cables are extremely vulnerable to external electromagnetic signal interference. Therefore, a shielding structure design is often required to eliminate or reduce the interference between external electromagnetic fields or adjacent cables. The shielding method generally adopted for a single high-speed transmission signal line is to wrap or longitudinally wrap a metal shielding tape on the surface of the core wire.

[0003] Please refer to the cable disclosed in Chinese Utility Model Patent No. CN212434276U, which includes a pair of parallel core wires, a first shielding tape wrapped outside the core wires, and a second shielding tape wrapped outside the first shielding tape. The first shielding tape is longitudinally wrapped outside the pair of parallel core wires, and the second shielding tape is wound outside the first shielding tape. After the shielding tape is wrapped, gaps will be generated, affecting the electromagnetic interference resistance of the cable. Moreover, the cables need to be welded to the corresponding connection components one by one, and the assembly and welding process is complex.

[0004] Therefore, it is necessary to provide a cable with good electrical performance and capable of being integrally assembled and welded.

Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a cable with good electrical performance, which is convenient for integral assembly and welding.

[0006] To achieve the above purpose, the utility model can adopt the following technical solutions: A cable includes several core wire groups arranged in a transverse direction. Each core wire group includes a pair of inner conductors and an inner insulating layer wrapped outside the inner conductors. Further, it includes two shielding layers, and the shielding layers are wrapped on each core wire group from the upper and lower sides perpendicular to the transverse direction. The inner insulating layer includes a first insulating layer wrapped outside the corresponding inner conductor and a second insulating layer wrapped outside the first insulating layer.

[0007] Compared with the prior art, the utility model has the following beneficial effects: The shielding layers are wrapped on each core wire group from the upper and lower sides perpendicular to the transverse direction, and the core wire groups are arranged in a row in the transverse direction. It not only has good electrical performance but also is convenient for the integral assembly and welding of the cable, greatly improving the production efficiency.

Description of the Drawings

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

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

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

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

[0012] Figure 5 It is a cross-sectional view of the fifth embodiment of the cable of the present utility model.

[0013] Figure 6 is Figure 5 a cross-sectional view of the core wire of the cable of the fifth embodiment.

[0014] Figure 7 It is a cross-sectional view of the sixth embodiment of the cable of the present utility model.

[0015] Figure 8 is Figure 7 a cross-sectional view of the core wire of the cable of the sixth embodiment.

[0016]

Description of Main Component Symbols

[0017] Cables 100, 200, 300, 400, 500, 600 Shield layer 20

[0018] Core wire groups 101, 201, 301, 401, 501, 601 Inner insulation layer 12

[0019] Connection parts 1521, 1621 Inner conductors 11, 31

[0020] Inner core wires 113, 133, 153 Bare ground wire 30

[0021] First insulation layers 121, 131 Upper shield layer 21

[0022] Second insulation layers 122, 132, 152, 162 Lower shield layer 22

Detailed Implementation Modes

[0023] Please refer to Figure 1As shown, it is the first embodiment of the cable 100 of the present utility model. The cable 100 includes a plurality of core wire groups 101 and a shielding layer 20 wrapped outside the core wire groups 101. The plurality of core wire groups 101 are arranged at intervals in the transverse direction. The shielding layer 20 is wrapped on the core wire groups 101 from both sides in the up-and-down direction perpendicular to the transverse direction to fix each of the core wire groups 101 in the transverse direction and provide shielding between adjacent core wire groups 101.

[0024] Each of the core wire groups 101 is independently provided. An equal gap is reserved between adjacent core wire groups 101 as a spacer. Each of the core wire groups 101 includes a pair of inner conductors 11 and an inner insulating layer 12 wrapped outside the inner conductors 11. The inner conductors 11 are used for transmitting high-speed signals. The inner conductors 11 are silver-plated copper inner conductors 11. The inner insulating layer 12 includes a first insulating layer 121 wrapped outside the corresponding inner conductor 11 and a second insulating layer 122 wrapped outside the first insulating layer 121. The first insulating layer 121 is extruded and formed outside the corresponding inner conductor 11 to form a pair of inner core wires 113. The cross-sectional shape of the first insulating layer 121 is circular, and the pair of inner core wires 113 are arranged side by side longitudinally and are in contact with each other. The second insulating layer 122 is extruded and formed outside the pair of inner core wires 113, so that the relative positions of the two inner conductors 11 are fixed. There is no air gap between the second insulating layer 122 and the first insulating layer 121 of the inner core wire 113. The cross-sectional shape of the second insulating layer 122 is semi-circular on both sides in the transverse direction. The cable 100 further includes a pair of bare ground wires 30 arranged on both sides in the transverse direction of each of the core wire groups 101. The bare ground wires 30 are both mechanically and electrically in contact with the two shielding layers 20. In other embodiments, only one bare ground wire 30 may be provided. Each of the core wire groups 101 can transmit a pair of differential signals. The number of the core wire groups 101 can be increased according to the usage scenario and requirements.

[0025] Specifically, in this embodiment, the shielding layer 20 is provided with two layers, namely the upper shielding layer 21 and the lower shielding layer 22. Both the upper shielding layer 21 and the lower shielding layer 22 are thermally adhesive metal shielding tapes. The upper and lower surfaces of the shielding tape are processed by a lamination process so that the thermally adhesive metal shielding tape forms the shielding layer 20. The upper shielding layer 21 and the lower shielding layer 22 are bonded together in the gap between adjacent core wire groups 101. The shielding layer 20 of the present invention uses a lamination and pasting method to cover the metal layers on the upper and lower surfaces, greatly reducing the shielding gaps. The anti-electromagnetic interference ability is greatly improved. At the same time, it can also reduce the problem of unstable electrical characteristics of the cable caused by the tension fluctuation of the wrapping machine during the traditional wrapping process. And the cable shielding layer 20 of the present invention can not only shield interference but also fix each core wire group 101 into one body. Compared with the cumbersome steps of the traditional high-speed laminated flat cable of first wrapping the shielding tape and then pasting the thermally adhesive mylar, this new structure can be formed in one step, greatly improving the production efficiency; and the outer mylar is omitted, making the size smaller and the cost lower.

[0026] Please refer to Figure 2 As shown, it is the second embodiment of the cable 200 of the present invention. Compared with the cable 100 of the first embodiment, in this embodiment, no bare ground wires are provided on both sides of the core wire group 201.

[0027] Please refer to Figure 3 As shown, it is the third embodiment of the cable 300 of the present invention. Compared with the cable 100 of the first embodiment, in this embodiment, the first insulating layers 131 outside a pair of the inner conductors 31 of the inner core wires 133 of each core wire group 301 are co-extruded and formed outside the pair of inner conductors 31 to form an eight-shaped inner core wire 133, and then the second insulating layer 132 is extruded.

[0028] Please refer to Figure 4 As shown, it is the fourth embodiment of the cable 400 of the present invention. Compared with the cable 300 of the third embodiment, in this embodiment, no bare ground wires are provided on both sides of the core wire group 401.

[0029] Please refer to Figure 5 As shown, it is the fifth embodiment of the cable 500 of the present invention. Compared with the cable 200 of the second embodiment, in this embodiment, the second insulating layer 152 is co-extruded and formed outside each inner core wire 153. Each core wire group 501 is connected into a whole along the transverse direction through the second insulating layer 152. The second insulating layers 152 between adjacent core wire groups 501 include a connecting portion 1521, and the size of the connecting portion 1521 in the up and down direction is smaller than the size of the thinnest part of the second insulating layer 152. Please refer to Figure 6 As shown, it is a cross-sectional view of the core wire group 501 of the cable of the fifth embodiment.

[0030] Please refer to Figure 7As shown, this is the sixth embodiment of the cable 600 of the present utility model. Compared with the cable 400 of the fourth embodiment, in this embodiment, between each of the core wire groups 601, they are connected into a whole along the transverse direction through the second insulating layer 162. Between the second insulating layers 162 of the adjacent core wire groups 601, there is a connecting portion 1621. Please refer to Figure 8 As shown, it is a cross-sectional view of the core wire group 601 of the cable of the sixth embodiment.

[0031] The inner insulating layer 12 of the cable of the present utility model includes a first insulating layer 121 covering the corresponding inner conductor and a second insulating layer 122 covering the outside of the first insulating layer 121, with relatively high stability and stronger mechanical properties. In addition, the shielding layer 30 covers each core wire group 10 from the upper and lower sides perpendicular to the transverse direction, arranging each core wire group in a row along the transverse direction, which not only has good electrical properties, but also facilitates the overall assembly and welding of the cable, greatly improving the production efficiency; and the outer Mylar can be omitted, achieving a smaller size and lower cost.

Claims

1. A cable, comprising a plurality of core wire groups, the core wire groups are arranged in a transverse direction, each of the core wire groups comprises a pair of inner conductors and an inner insulating layer coated outside the inner conductors, characterized in that: It further includes two shielding layers, which are coated on each of the core wire groups from upper and lower sides perpendicular to the transverse direction, and the inner insulating layer includes a first insulating layer coating the outside of the corresponding inner conductor and a second insulating layer coating the outside of the first insulating layer.

2. The cable according to claim 1, characterized in that: The first insulating layer is extruded outside the corresponding inner conductors of the pair of inner conductors to form a pair of inner core wires, and the second insulating layer is extruded outside the pair of inner core wires.

3. The cable according to claim 2, characterized in that: The cross-sectional shape of the second insulating layer is semicircular on both sides in the lateral direction, and the cross-sectional shape of the first insulating layer is circular.

4. The cable according to claim 3, characterized in that: The outer surfaces of the first insulating layers outside the pair of inner conductors are in contact with each other.

5. The cable according to claim 3, characterized in that: Each core wire group is independently arranged, and adjacent core wire groups are separated by the shielding layer in the transverse direction.

6. The cable according to claim 2, characterized in that: The core wire groups are connected into a whole along the transverse direction through the second insulating layer.

7. The cable according to claim 1, characterized in that: It further includes a pair of bare ground wires arranged on both sides of each core wire group in the transverse direction.

8. The cable according to claim 7, characterized in that: The bare ground wire is in mechanical and electrical contact with the two shielding layers.

9. The cable according to claim 1, characterized in that: Each of the core wire groups includes a pair of inner conductors, first insulating layers outside the pair of inner conductors are extruded together outside the pair of inner conductors, and connecting parts are provided on both sides of the pair of inner conductors in the lateral direction.

10. The cable according to claim 1, characterized in that: The inner conductor is a silver-plated copper inner conductor.

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