Miniaturized anti-core-channeling two-core shielding flat cable

Abstract

The utility model discloses a miniaturized anti-core-channeling two-core shielding flat cable, which comprises two insulating wire cores and two fan-shaped PE resin filling core frames which are arranged in a cross shape to form a cable core, and each insulating wire core comprises a silver-plated copper wire conductor, a PFA inner insulating layer and a foaming PFA outer insulating layer. A polyester fiber plain woven fabric longitudinal wrapping layer, a copper-plastic composite longitudinal wrapping shielding layer and a PFA outer sheath layer are sequentially wrapped outside the cable core, the copper-plastic composite longitudinal wrapping shielding layer is of a copper-plastic composite belt longitudinal lap-joint wrapping structure, a copper-plastic composite belt is formed by bonding a PET film inner layer and a copper foil outer layer into a whole, sheet-shaped grounding copper foil is arranged between the copper foil outer layer and the PFA outer sheath layer, and the copper foil outer layer and the PFA outer sheath layer are wrapped in a copper-plastic composite belt longitudinal lap-joint wrapping structure. The surface of the outer layer of the copper foil and the surface of the flaky grounding copper foil are electroplated to form copper-zinc alloy electroplated layers. The flat cable is prepared based on a miniaturized structure, the cable core structure is more balanced and stable, core channeling does not occur when the flat cable bears bending, the surface oxidation of the copper foil is effectively inhibited, the stable signal transmission characteristic is ensured, and the durability is better.

Description

Technical Field

[0001] The present application belongs to the field of cable technology, and in particular relates to a miniaturized anti-channeling 2-core shielded flat cable. Background Art

[0002] Flat cables are straight and flat in shape, and they need to meet the working conditions of the production line when used in industrial production lines. During the wiring installation process, the two insulated cores arranged side by side in the deformed cable are prone to cross-core when subjected to bending, which will cause the cable core structure to deform, the strength to deteriorate, and the high-frequency signal transmission characteristics to be unstable, affecting the electrical characteristics of the cable. In addition, the copper foil shielding layer of the cable is prone to oxidation and surface discoloration. With the trend of miniaturization of cables, it is imperative to develop a miniaturized structural design for flat cables and improve stable signal transmission characteristics. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present application is to provide a miniaturized anti-core-crosstalk 2-core shielded flat cable. The cable core structure is more balanced and stable, the structural strength is better, and there will be no core-crosstalk when subjected to bending. The oxidation of the copper foil surface is effectively suppressed, thereby ensuring stable signal transmission characteristics and better durability.

[0004] This application solves the above technical problems through the following technical solutions.

[0005] A miniaturized anti-core cross-talk 2-core shielded flat cable comprises two insulating cores and two fan-shaped PE resin filled core frames arranged in a cross shape to form a cable core, wherein the insulating core comprises a silver-plated copper wire conductor, a PFA inner insulation layer and a foamed PFA outer insulation layer, wherein the diameter of the silver-plated copper wire conductor is 0.15 mm to 0.64 mm, and the outside of the cable core is sequentially coated with a polyester fiber plain woven cloth longitudinal sheath, a copper-plastic composite longitudinal sheath shielding layer and a PFA outer sheath layer, wherein the copper-plastic composite longitudinal sheath shielding layer is a copper-plastic composite tape longitudinally lapped wrapped structure, wherein the copper-plastic composite tape is a PET film inner layer and a copper foil outer layer bonded together, and a sheet-shaped grounding copper foil is arranged between the copper foil outer layer and the PFA outer sheath layer, wherein the thickness of the sheet-shaped grounding copper foil is 15 μm to 120 μm, and the surface of the copper foil outer layer and the surface of the sheet-shaped grounding copper foil are both electroplated to form a copper-zinc alloy electroplating layer.

[0006] Preferably, the copper-zinc alloy electroplating layer has a thickness of no more than 1 μm.

[0007] Preferably, the silver-plated copper wire conductor is composed of a plurality of silver-plated copper single wires with a wire diameter of 0.02 mm to 0.04 mm twisted together.

[0008] Preferably, the lay length of the silver-plated copper wire conductor is 5 to 15 times the outer diameter of the silver-plated copper wire conductor.

[0009] Preferably, the thickness of the PFA inner insulation layer and the thickness of the foamed PFA outer insulation layer are both 0.01 mm to 1 mm, and the thickness of the foamed PFA outer insulation layer is not less than the thickness of the PFA inner insulation layer.

[0010] Preferably, the thickness of the longitudinal covering layer of the polyester fiber plain woven fabric is 0.01 mm to 1 mm.

[0011] Preferably, the thickness of the PFA outer sheath layer is 0.03 mm to 0.5 mm.

[0012] Preferably, the outer layer thickness of the copper foil is 2 μm to 15 μm, and the inner layer thickness of the PET film is 20 μm to 50 μm.

[0013] Preferably, the polyester fiber plain woven fabric longitudinal wrapping layer is a double-layer polyester fiber plain woven fabric butt-seam longitudinal wrapping structure, and the two longitudinal gaps formed are 180 degrees to each other in the circumferential direction.

[0014] Beneficial effects of this application:

[0015] 1. By adding two fan-shaped PE resin filled core frames and two insulating cores to form a cross-shaped arrangement, it is beneficial to ensure that the cable core cross-sectional structure is more balanced and stable, and the bending resistance is better. The contact area between the fan-shaped filled core frame and the insulating core is large, the force is balanced, the cable core structure strength is improved, and the occurrence of core cross-talk inside the cable core is effectively suppressed. It helps to reduce the diameter of the silver-plated copper wire conductor within the specification range of 0.15mm to 0.64mm, which is beneficial to miniaturized structural design. The original copper wire grounding wire is replaced by a sheet-shaped grounding copper foil, and the thinning thickness is 15μm to 120μm, which is beneficial to miniaturized structural design. The outer layer of the copper foil of the copper-plastic composite shielding layer and the outer part of the grounding copper foil are electroplated to form a copper-zinc alloy electroplating layer, which has sufficient corrosion resistance, inhibits the oxidation of the copper foil, ensures the stability of signal transmission, and improves the electrical properties of the cable.

[0016] 2. The cable core is covered with a polyester fiber plain woven fabric longitudinal sheath on the outside. It is a double-layer polyester fiber plain woven fabric butt-seam longitudinal sheath structure, and the two longitudinal gaps formed are 180 degrees to each other in the circumferential direction. The wrapping tension is tight without wrinkling, which helps to maintain a uniform distance between the inner conductor and the shielding layer, ensure the stability of the electrical characteristics, and better durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the cross-sectional structure of an embodiment of the present application.

[0018] Description of reference numerals:

[0019] 1-insulated wire core, 2-fan-shaped PE resin filled core frame, 3-silver-plated copper wire conductor, 4-PFA inner insulation layer, 5-foamed PFA outer insulation layer, 6-polyester fiber plain woven fabric longitudinal sheath, 7-copper plastic composite longitudinal sheath shielding layer, 8-PFA outer sheath layer, 9-sheet grounding copper foil. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0021] See also Figure 1 The miniaturized anti-channeling 2-core shielded flat cable of the embodiment of the present application includes two insulating cores 1 and two fan-shaped PE resin filled core frames 2 arranged in a cross shape to form a cable core. The insulating core 1 includes a silver-plated copper wire conductor 3, a PFA inner insulation layer 4 and a foamed PFA outer insulation layer 5. The diameter of the silver-plated copper wire conductor 3 is 0.15mm to 0.64mm. Specifically, the silver-plated copper wire conductor 3 is composed of a number of silver-plated copper single wires with a wire diameter of 0.02mm to 0.04mm. Further, the lay length of the silver-plated copper wire conductor 3 is 5 to 15 times the outer diameter of the silver-plated copper wire conductor 3. The thickness of the PFA inner insulation layer 4 and the thickness of the foamed PFA outer insulation layer 5 are both 0.01mm to 1mm, and the thickness of the foamed PFA outer insulation layer 5 is not less than the thickness of the PFA inner insulation layer 4.

[0022] The cable core is coated with a polyester fiber woven fabric longitudinal sheath 6, a copper-plastic composite longitudinal sheath shielding layer 7 and a PFA outer sheath 8 in sequence. In one embodiment, the polyester fiber woven fabric longitudinal sheath 6 is a double-layer polyester fiber woven fabric longitudinal sheath structure with two longitudinal gaps formed at 180 degrees to each other in the circumference. The thickness of the polyester fiber woven fabric longitudinal sheath 6 is 0.01mm to 1mm. The copper-plastic composite longitudinal sheath shielding layer 7 is a copper-plastic composite tape longitudinal lap wrapping structure, and the copper-plastic composite tape is a PET film inner layer and a copper foil outer layer bonded together. Further, the outer layer of the copper foil has a thickness of 2μm to 15μm, and the inner layer of the PET film has a thickness of 20μm to 50μm. A sheet-shaped grounding copper foil 9 is provided between the outer layer of the copper foil and the PFA outer sheath 8, and the thickness of the sheet-shaped grounding copper foil 9 is 15μm to 120μm. The outer surface of the copper foil and the surface of the sheet-shaped grounding copper foil 9 are both electroplated to form a copper-zinc alloy electroplating layer, and the thickness of the copper-zinc alloy electroplating layer is not greater than 1 μm. The thickness of the PFA outer sheath layer 8 is 0.03 mm to 0.5 mm.

[0023] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. Miniaturized anti-channeling 2-core shielded flat cable, its characteristics are: The invention comprises two insulating wire cores (1) and two fan-shaped PE resin filled core frames (2) arranged in a cross shape to form a cable core, wherein the insulating wire core (1) comprises a silver-plated copper wire conductor (3), a PFA inner insulation layer (4) and a foamed PFA outer insulation layer (5), wherein the diameter of the silver-plated copper wire conductor (3) is 0.15 mm to 0.64 mm, and the outside of the cable core is sequentially coated with a polyester fiber plain woven fabric longitudinal sheath (6), a copper-plastic composite longitudinal sheath shielding layer (7) and a PFA outer sheath. The sleeve layer (8) is a copper-plastic composite longitudinal shielding layer (7) having a copper-plastic composite tape longitudinally overlapped and wrapped structure, the copper-plastic composite tape is a PET film inner layer and a copper foil outer layer bonded together, a sheet-shaped grounding copper foil (9) is arranged between the copper foil outer layer and the PFA outer sheath layer (8), the sheet-shaped grounding copper foil (9) has a thickness of 15 μm to 120 μm, and the surface of the copper foil outer layer and the surface of the sheet-shaped grounding copper foil (9) are both electroplated to form a copper-zinc alloy electroplating layer.

2. The miniaturized anti-channeling 2-core shielded flat cable according to claim 1 is characterized by: The copper-zinc alloy electroplating layer has a thickness of no more than 1 μm.

3. The miniaturized anti-core crosstalk 2-core shielded flat cable according to claim 1 is characterized in that: The silver-plated copper wire conductor (3) is composed of a plurality of silver-plated copper single wires with a wire diameter of 0.02 mm to 0.04 mm twisted together.

4. The miniaturized anti-core crosstalk 2-core shielded flat cable according to claim 3 is characterized by: The lay length of the silver-plated copper wire conductor (3) is 5 to 15 times the outer diameter of the silver-plated copper wire conductor (3).

5. The miniaturized anti-channeling 2-core shielded flat cable according to claim 1 is characterized by: The thickness of the PFA inner insulating layer (4) and the thickness of the foamed PFA outer insulating layer (5) are both 0.01 mm to 1 mm, and the thickness of the foamed PFA outer insulating layer (5) is not less than the thickness of the PFA inner insulating layer (4).

6. The miniaturized anti-core crosstalk 2-core shielded flat cable according to claim 1 is characterized by: The thickness of the polyester fiber plain woven fabric longitudinal covering layer (6) is 0.01 mm to 1 mm.

7. The miniaturized anti-core crosstalk 2-core shielded flat cable according to claim 1 is characterized by: The thickness of the PFA outer sheath layer (8) is 0.03 mm to 0.5 mm.

8. The miniaturized anti-core crosstalk 2-core shielded flat cable according to claim 1 is characterized by: The outer layer thickness of the copper foil is 2 μm to 15 μm, and the inner layer thickness of the PET film is 20 μm to 50 μm.

9. The miniaturized anti-core crosstalk 2-core shielded flat cable according to claim 1 is characterized by: The polyester fiber plain woven fabric longitudinal wrapping layer (6) is a double-layer polyester fiber plain woven fabric longitudinal wrapping structure with two longitudinal slits formed at 180 degrees to each other in the circumferential direction.

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