Bending-resistant breakage-proof VGA (Video Graphic Array) video cable

Abstract

The utility model discloses an anti-bending and anti-breaking line type VGA video cable, comprising three groups of video wire core groups which are arranged at intervals of 120 degrees in the circumferential direction through a Y-shaped isolation core frame and are twisted together to form a cable core, and the Y-shaped isolation core frame comprises a Y-shaped PP resin core frame body and an aluminum foil shielding layer. Each video wire core group is composed of a coaxial wire core and two electronic wire cores, the coaxial wire core comprises a central conductor, a foamed polyethylene insulating layer, a copper wire braided sub-shielding layer and a nylon sheath layer, and the outer surface of the foamed polyethylene insulating layer and the outer surface of the nylon sheath layer are respectively provided with an embossed structure with the roughness of 3-5 microns. The cable core is coated with an irradiation crosslinking high-density polyethylene outer sheath layer. The cable is better in bending resistance, the coaxial wire core conductors are not easy to deform and break, crosstalk between the wire cores in the cable core is effectively inhibited, stable signal transmission characteristics are ensured, high-definition video transmission quality is improved, and durability is better.

Description

Technical Field

[0001] This application relates to the technical field of cables, and particularly to a bend-resistant and breakage-preventive VGA video cable. Background Art

[0002] VGA video cables are suitable for connection in the VGA transmission mode and are used in the D-SUB15PIN interfaces of various electronic and electrical devices, such as the connecting cables of computer monitors, projectors, high-definition digital TVs and other household appliances. The long-term working temperature range is from -15 to 70 degrees Celsius. In the application environment of electronic and electrical devices, some are noise sources, and it is necessary to resist electromagnetic noise interference on the electrical circuits of electronic and electrical devices and prevent crosstalk between internal wire cores, which will affect the signal transmission quality and stability of VGA video cables. The existing VGA video cables have insufficient shielding performance and cannot fully suppress crosstalk between wire cores, resulting in poor signal transmission stability. Moreover, the bend resistance is poor. When the video cable is bent, the lateral pressure is likely to cause deformation and breakage of the coaxial wire core conductor, the signal transmission characteristics are unstable, affecting the normal high-definition video transmission quality, and it is not durable for application. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the technical problem to be solved by this application is to provide a bend-resistant and breakage-preventive VGA video cable, which has better bend resistance, the coaxial wire core conductor is not easily deformed and broken, effectively suppresses crosstalk between wire cores inside the cable core, ensures stable signal transmission characteristics, improves the high-definition video transmission quality, and has better durability.

[0004] The above technical problem is solved by the following technical solutions in this application.

[0005] The bend-resistant and breakage-preventive VGA video cable includes three groups of video wire core groups that are circumferentially separated from each other by 120 degrees through a Y-shaped isolation core frame and jointly stranded to form a cable core. The Y-shaped isolation core frame includes a Y-shaped PP resin core frame body and an aluminum foil shielding layer coated on the outside of the Y-shaped PP resin core frame body. Each group of video wire core groups is composed of a coaxial wire core and two electronic wire cores. The coaxial wire core includes a central conductor, a foamed polyethylene insulating layer, a copper wire braided sub-shielding layer, and a nylon sheath layer. Embossed structures with a roughness of 3 to 5 microns are formed on the outer surfaces of the foamed polyethylene insulating layer and the nylon sheath layer. An irradiated cross-linked high-density polyethylene outer sheath layer is coated on the outside of the cable core.

[0006] Preferably, the central conductor is formed by concentrically stranding a number of tinned copper single wires with a wire diameter of 0.05 mm to 0.08 mm.

[0007] Preferably, the electronic wire core includes an inner conductor and an irradiated cross-linked low-density polyethylene insulating layer.

[0008] Preferably, the inner conductor is a tinned copper single wire conductor.

[0009] Preferably, in each group of video line core groups, two electronic line cores are symmetrically arranged on both sides of the coaxial line core.

[0010] Preferably, the thickness of the Y-shaped PP resin core frame is not less than 0.5 mm.

[0011] Preferably, the thickness of the aluminum foil shielding layer is 20 μm to 80 μm.

[0012] Preferably, the copper wire braided partial shielding layer is a structure in which a plurality of polyester fiber copper foil wires and silver-plated copper wires are wound and braided in reverse spiral.

[0013] Preferably, the wire diameter ratio between the polyester fiber copper foil wire and the silver-plated copper wire is between 0.9 and 1.

[0014] Advantages of the present application:

[0015] 1. By optimizing the coaxial line core structure, embossed structures with a roughness of 3 μm to 5 μm are formed on both the outer surface of the foamed polyethylene insulating layer and the outer surface of the nylon sheath layer. When the video cable is bent and the coaxial line core bears lateral pressure, the outer surface of the foamed polyethylene insulating layer has an embossed structure, which helps to generate relative movement between the foamed polyethylene insulating layer and the copper wire braided partial shielding layer. At the same time, the outer surface of the nylon sheath layer has an embossed structure, which helps to generate relative movement between the nylon sheath layer and the irradiated cross-linked high-density polyethylene outer sheath layer, which is beneficial to avoiding excessive load on the center conductor and deformation and disconnection of the wire, ensuring stable signal transmission characteristics, improving the bending resistance, and having better durability.

[0016] 2. Optimize the cable core structure. Through the Y-shaped isolation core frame, an electrical insulation distance is maintained between the three groups of video line cores, ensuring the balanced stability of the cable core structure. And through the wrapped aluminum foil shielding layer, the mutual shielding effect between the coaxial line cores is enhanced, effectively suppressing crosstalk, which helps to improve the quality and stability of signal transmission and has better durability in long-term use.

[0017] 3. Each group of video line core groups is paired with a coaxial line core and two electronic line cores, and the two electronic line cores are symmetrically arranged on both sides of the coaxial line core, making the cable core structure balanced, having high mechanical strength, reducing local stress concentration of each line core, suppressing the occurrence of broken cores and broken wires, extending the service life, and improving the durability in long-term use. Brief Description of the Drawings

[0018] Figure 1 It is a schematic cross-sectional structure diagram of an embodiment of the present application.

[0019] Explanation of the reference numerals:

[0020] 1 - Y - shaped isolation core frame, 2 - Y - shaped PP resin core frame body, 3 - aluminum foil shielding layer, 4 - coaxial cable core, 5 - electronic wire core, 6 - center conductor, 7 - foamed polyethylene insulation layer, 8 - copper wire braided partial shielding layer, 9 - nylon sheath layer, 10 - irradiated cross - linked high - density polyethylene outer sheath layer, 11 - inner conductor, 12 - irradiated cross - linked low - density polyethylene insulation layer. Specific embodiments

[0021] The terms used in the embodiments section of this application are only for explaining the specific embodiments of this application and are not intended to limit this application. The embodiments of this application will be described in detail below in conjunction with the drawings.

[0022] See Figure 1 , the anti - bending and anti - breaking VGA video cable of the embodiment of this application includes three groups of video wire core groups that are circumferentially arranged at 120 - degree intervals from each other through the Y - shaped isolation core frame 1 and are jointly stranded to form a cable core. The Y - shaped isolation core frame 1 includes a Y - shaped PP resin core frame body 2 and an aluminum foil shielding layer 3 coated on the outside of the Y - shaped PP resin core frame body 2. Further, the thickness of the Y - shaped PP resin core frame body 2 is not less than 0.5 mm, and the thickness of the aluminum foil shielding layer 3 is 20 μm to 80 μm. An irradiated cross - linked high - density polyethylene outer sheath layer 10 is coated on the outside of the cable core.

[0023] Each group of video wire core groups is composed of a coaxial cable core 4 and two electronic wire cores 5. Further, the two electronic wire cores 5 are symmetrically arranged on both sides of the coaxial cable core 4. The coaxial cable core 4 includes a center conductor 6, a foamed polyethylene insulation layer 7, a copper wire braided partial shielding layer 8, and a nylon sheath layer 9. Specifically, the center conductor 6 is formed by concentrically stranding a number of tinned copper single wires with a wire diameter of 0.05 mm to 0.08 mm. Embossed structures with a roughness of 3 μm to 5 μm are formed on the outer surfaces of both the foamed polyethylene insulation layer 7 and the nylon sheath layer 9. In one embodiment, the copper wire braided partial shielding layer 8 is a reverse spiral winding and braiding structure of a number of polyester fiber copper foil wires and silver - plated copper wires. Further, the wire diameter ratio between the polyester fiber copper foil wires and the silver - plated copper wires is between 0.9 and 1. In one embodiment, the electronic wire core 5 includes an inner conductor 11 and an irradiated cross - linked low - density polyethylene insulation layer 12. Specifically, the inner conductor 11 is a tinned copper single - wire conductor.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. Anti-bending and anti-breaking VGA video cable, its characteristics are: The invention comprises three groups of video line core groups which are arranged 120 degrees apart from each other in the circumferential direction through a Y-shaped isolation core frame (1) and twisted together to form a cable core. The Y-shaped isolation core frame (1) comprises a Y-shaped PP resin core frame body (2) and an aluminum foil shielding layer (3) coated on the outside of the Y-shaped PP resin core frame body (2). Each group of video line core groups is composed of a coaxial core (4) and two electronic cores (5). The coaxial core (4) comprises a central conductor (6), a foamed polyethylene insulation layer (7), a copper wire braided shielding layer (8) and a nylon sheath layer (9). The outer surface of the foamed polyethylene insulation layer (7) and the outer surface of the nylon sheath layer (9) are both formed with an embossed structure with a roughness of 3 to 5 microns. The cable core is coated with a radiation cross-linked high-density polyethylene outer sheath layer (10).

2. The anti-bending and anti-breaking VGA video cable according to claim 1 is characterized in that: The central conductor (6) is formed by concentrically twisting a number of tinned copper monofilaments with a wire diameter of 0.05 mm to 0.08 mm.

3. The anti-bending and anti-breaking VGA video cable according to claim 1 is characterized in that: The electronic wire core (5) comprises an inner conductor (11) and a radiation cross-linked low-density polyethylene insulation layer (12).

4. The anti-bending and anti-breaking VGA video cable according to claim 3 is characterized in that: The inner conductor (11) is a tinned copper monofilament conductor.

5. The anti-bending and anti-breaking VGA video cable according to claim 1, characterized in that: In each video line core group, two electronic line cores (5) are symmetrically arranged on both sides of the coaxial line core (4).

6. The anti-bending and anti-breaking VGA video cable according to claim 1, characterized in that: The thickness of the Y-shaped PP resin core frame (2) is not less than 0.5 mm.

7. The anti-bending and anti-breaking VGA video cable according to claim 1, characterized in that: The thickness of the aluminum foil shielding layer (3) is 20 μm to 80 μm.

8. The anti-bending and anti-breaking VGA video cable according to claim 1, characterized in that: The copper wire braided shielding layer (8) is a braided structure in which a plurality of polyester fiber copper foil wires and silver-plated copper wires are mutually spirally wound in opposite directions.

9. The bending and disconnection resistant VGA video cable according to claim 8, characterized in that: The wire diameter ratio of the polyester fiber copper foil wire and the silver-plated copper wire is between 0.9 and 1.

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