Improved radio frequency coaxial cable

Abstract

The invention provides an improved radio frequency coaxial cable which sequentially comprises an inner core, an insulating layer, a shielding layer, a protective layer, a center retainer and an outer retainer from inside to outside. The inner core is assembled on the central retainer, the insulating layer wraps the inner core and the central retainer, and a gap is formed between the inner core and the inner wall of the insulating layer. The outer-layer retainer is located in the protective layer, the outer-layer retainer comprises a plurality of independently-arranged protective strips, a plurality of outer-layer anti-bending blocks are arranged on the protective strips in the axial direction, and outer-layer anti-bending grooves are formed between the outer-layer anti-bending blocks. When the cable is bent, the adjacent outer-layer anti-bending blocks located on the same protection strip can be close to each other, but the cable cannot be bent again when the bending degree is increased until a certain critical point is reached, so that the problems of internal structure damage and transmission quality reduction caused by excessive bending of the cable are effectively prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of coaxial cables, and in particular relates to an improved radio frequency coaxial cable. Background Art

[0002] With the rapid development of information technology, the requirements for data transmission rate and quality are increasing. As a signal transmission medium widely used in broadcasting, television, communication networks and other fields, the performance of coaxial cable directly affects the stability and reliability of the entire system. The traditional coaxial cable structure usually includes an inner core, an insulation layer, a shielding layer and an outermost protective sheath. Although this design can meet basic data transmission requirements, it shows obvious limitations when facing some special environments or installation conditions.

[0003] Especially in application scenarios that require frequent bending or wiring in a small space, traditional coaxial cables lack an effective bending protection mechanism. When deformed by external forces, relative displacement or even extrusion between internal layers is likely to occur. In particular, when the cable is excessively bent, the distance between the center conductor and the insulation layer may change, resulting in impedance mismatch; at the same time, the shielding layer may also be damaged, affecting its electromagnetic shielding effect. These problems will ultimately cause increased signal attenuation and interference, and in severe cases, even lead to the interruption of the entire communication link. Summary of the invention

[0004] In order to solve the above technical problems, the present invention is solved by the following technical solutions.

[0005] An improved radio frequency coaxial cable includes, from the inside to the outside, an inner core, an insulating layer, a shielding layer, a protective layer, a central retaining frame, and an outer retaining frame. The inner core is mounted on the central retaining frame, the insulating layer wraps the inner core and the central retaining frame, and there is a gap between the inner core and the inner wall of the insulating layer. The outer retaining frame is located in the protective layer, and the outer protective frame includes a plurality of independently arranged protective strips, a plurality of outer anti-bending blocks are axially arranged on the protective strips, and outer anti-bending grooves are provided between the outer anti-bending blocks. When the cable is bent, adjacent outer anti-bending blocks on the same protective strip can approach each other, but as the bending degree increases until a certain critical point is reached, the cable can no longer bend, thereby effectively preventing the internal structure damage and transmission quality degradation caused by excessive bending of the cable. This design not only enhances the physical strength of the cable, but also ensures that good electrical properties can be maintained even in complex installation environments.

[0006] As a preferred technical solution for an improved radio frequency coaxial cable, specifically, the cross section of the protection strip is a T-shaped one including a horizontal portion and a vertical portion, the vertical portion of the T-shaped one faces the outside of the cable, and the outer anti-bending block and the outer anti-bending groove are located on the vertical portion. This design can enhance the compression resistance of the cable. When the cable is compressed, the horizontal portion of the T-shaped one can abut against the adjacent protection strip, so that the outer retainer as a whole forms an annular pressure-bearing structure that protects the inner core.

[0007] As a preferred technical solution for an improved radio frequency coaxial cable, specifically, the bottom of the outer anti-bending groove is narrow and the groove opening is wide, and there is an angle α between the two side walls of the outer anti-bending groove, and the range of the angle α is 40°≤α≤70°. This design can optimize the mechanical properties of the anti-bending groove and improve the bending life and fatigue resistance of the cable.

[0008] As a preferred technical solution of the improved radio frequency coaxial cable, specifically, the outer anti-bending groove is filled with elastic foam cotton, which can prevent the part where the protective layer wraps the protective strip from being sunken.

[0009] As a preferred technical solution for an improved radio frequency coaxial cable, specifically, the central retaining frame includes a plurality of annularly distributed central protection parts, and a mounting groove for mounting the inner core is formed between the central protection parts. A plurality of central anti-bending blocks are axially arranged on the central protection part, and a central anti-bending groove is provided between the central anti-bending blocks. This design can effectively protect the inner core, prevent it from being deformed when bent or compressed, and improve the overall stability and reliability of the cable.

[0010] As a preferred technical solution for an improved radio frequency coaxial cable, specifically, the bottoms of the outer anti-bending groove and the central anti-bending groove are both provided with rounded corners to reduce stress concentration and improve the bending life and fatigue resistance of the cable.

[0011] As a preferred technical solution for an improved RF coaxial cable, specifically, the central retainer is made of polyetheretherketone (PEEK) or polyimide (PI) material. These two materials have good elasticity and heat resistance, can effectively protect the inner core from external pressure and temperature changes, and improve the reliability and durability of the cable.

[0012] As a preferred technical solution for an improved RF coaxial cable, the protective strip is made of copper alloy or aluminum-magnesium alloy. These materials not only have excellent elasticity, but also have good thermal conductivity, which helps to quickly conduct and disperse the heat generated by the cable during use, thereby improving the overall stability and service life of the cable.

[0013] As a preferred technical solution for an improved radio frequency coaxial cable, specifically, the insulating layer is made of polytetrafluoroethylene (PTFE) or polyfluoroethylene propylene (FEP) material. These materials have excellent electrical insulation properties and high temperature resistance, can maintain stable electrical properties in various harsh environments, and ensure the quality and reliability of signal transmission.

[0014] As a preferred technical solution for an improved radio frequency coaxial cable, specifically, the shielding layer is woven from tinned copper wires and wrapped with aluminum foil on the outside. This double-layer shielding structure can provide a more effective electromagnetic shielding effect, reduce the impact of external electromagnetic interference on signal transmission, and improve the purity and stability of signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of an improved radio frequency coaxial cable.

[0016] Figure 2 It is a cross-sectional view of the improved radio frequency coaxial cable.

[0017] Figure 3 It is a three-dimensional schematic diagram and a plan schematic diagram of the protection strip.

[0018] Figure 4 Schematic diagram of the structure of the center cage.

[0019] The following is a description of the markings in the accompanying drawings of the specification:

[0020] 10. Inner core; 20. Insulating layer; 30. Shielding layer; 40. Protective layer; 50. Center retaining frame; 51. Center anti-bending block; 52. Center anti-bending groove; 53. Assembly groove; 60. Protective strip; 61. Outer anti-bending block; 62. Outer anti-bending groove; 63. Elastic foam. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] In the following embodiments, the same or similar reference numerals throughout represent the same or similar components or components with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the terms: center, longitudinal, transverse, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and therefore cannot be understood as limiting the present invention. In addition, the terms: first, second, etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present invention, unless otherwise clearly specified and limited, the terms: install, connect, connect, etc. should be understood in a broad sense, and ordinary technicians in this field can understand the specific meaning of the above terms in this practicality according to the specific circumstances.

[0024] Reference Figures 1 to 4 , an improved radio frequency coaxial cable, which includes an inner core 10, an insulating layer 20, a shielding layer 30, a protective layer 40, a central retainer 50 and an outer retainer from the inside to the outside. The inner core 10 is assembled on the central retainer 50, and the insulating layer 20 wraps the inner core 10 and the central retainer 50 inside, and there is a gap between the inner core 10 and the inner wall of the insulating layer 20. The outer retainer is located in the protective layer 40, and the outer protective frame includes a plurality of independently arranged protective strips 60, and a plurality of outer anti-bending blocks 61 are axially arranged on the protective strips 60, and outer anti-bending grooves 62 are provided between the outer anti-bending blocks 61. When the cable is bent, the adjacent outer anti-bending blocks 61 on the same protective strip 60 can be close to each other, but as the bending degree increases until a certain critical point is reached, the cable can no longer bend, thereby effectively preventing the internal structure damage and transmission quality degradation caused by excessive bending of the cable. This design not only enhances the physical strength of the cable, but also ensures that good electrical properties can be maintained even in complex installation environments.

[0025] In the present application, the specific structure of the protective strip 60 is as follows: the cross section is a T-shape including a horizontal portion and a vertical portion, the vertical portion of the T-shape faces the outside of the cable, and the outer anti-bending block 61 and the outer anti-bending groove 62 are located on the vertical portion. This design can enhance the compressive resistance of the cable. When the cable is under pressure, the horizontal portion of the T-shape can abut against the adjacent protective strip 60, so that the outer retaining frame as a whole forms an annular pressure-bearing structure that protects the inner core 10. The bottom of the outer anti-bending groove 62 is narrow and the notch is wide. There is an angle α between the two side walls of the outer anti-bending groove 62, and the range of the angle α is 40°≤α≤70°. This design can optimize the mechanical properties of the anti-bending groove and improve the bending life and fatigue resistance of the cable. The outer anti-bending groove 62 is filled with elastic foam 63. The elastic foam 63 can prevent the part where the protective layer 40 wraps the protective strip 60 from being concave.

[0026] In the present application, the specific structure of the central retaining frame 50 is as follows: the central retaining frame 50 includes a plurality of annularly distributed central protection parts, and an assembly groove 53 for assembling the inner core 10 is formed between the central protection parts. A plurality of central anti-bending blocks 51 are axially arranged on the central protection part, and a central anti-bending groove 52 is provided between the central anti-bending blocks 51. This design can effectively protect the inner core 10, prevent it from deforming when bent or compressed, and improve the overall stability and reliability of the cable. Among them, the outer anti-bending groove 62 and the bottom of the central anti-bending groove 52 are both provided with rounded corners to reduce stress concentration and improve the bending life and fatigue resistance of the cable.

[0027] In terms of material selection, the center retainer 50 is made of polyetheretherketone (PEEK) or polyimide (PI). These two materials have good elasticity and heat resistance, can effectively protect the inner core 10 from external pressure and temperature changes, and improve the reliability and durability of the cable. The protective strip 60 is made of copper alloy or aluminum-magnesium alloy. These materials not only have excellent elasticity, but also have good thermal conductivity, which helps to quickly conduct and disperse the heat generated by the cable during use, and improve the overall stability and service life of the cable.

[0028] In the present application, the design of the T-shaped vertical part of the protective strip 60 facing the outside of the cable not only enhances the compression resistance of the cable, but also significantly increases the outer surface area of ​​the cable. This design, combined with materials with good thermal conductivity (such as copper alloy or aluminum-magnesium alloy), can greatly enhance the heat dissipation performance of the cable. When the cable generates heat during operation, the heat can be quickly conducted to the external environment through the T-shaped vertical part, thereby effectively reducing the temperature inside the cable. This not only helps to improve the working efficiency of the cable, but also prolongs its service life and reduces the risk of failure due to overheating.

[0029] In addition, the insulating layer 20 is made of polytetrafluoroethylene (PTFE) or polytetrafluoroethylene (FEP) material. These materials have excellent electrical insulation performance and high temperature resistance, can maintain stable electrical properties in various harsh environments, and ensure the quality and reliability of signal transmission. The shielding layer 30 is woven from tinned copper wire and wrapped with aluminum foil on the outside. This double-layer shielding structure can provide a more effective electromagnetic shielding effect, reduce the impact of external electromagnetic interference on signal transmission, and improve the purity and stability of signal transmission. The protective layer 40 is made of polyvinyl chloride (PVC) or polyurethane (PU) material. In order to further enhance the performance of the protective layer 40, flame retardants, UV inhibitors and antioxidants are added to the protective layer 40 to improve its fire resistance, UV resistance and antioxidant ability. These modifiers can enable the protective layer 40 to maintain good physical and chemical properties under extreme environments, ensuring the safe and reliable operation of the cable.

[0030] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. An improved radio frequency coaxial cable, comprising, from inside to outside, an inner core (10), an insulating layer (20), a shielding layer (30) and a protective layer (40), characterized in that: It also includes a central retaining frame (50) and an outer retaining frame; the inner core (10) is assembled on the central retaining frame (50), the insulating layer (20) wraps the inner core (10) and the central retaining frame (50), and there is a gap between the inner core (10) and the inner wall of the insulating layer (20); the outer retaining frame is located in the protective layer (40), and the outer protective frame includes a plurality of independently arranged protective strips (60), and a plurality of outer anti-bending blocks (61) are axially arranged on the protective strips (60), and outer anti-bending grooves (62) are provided between the outer anti-bending blocks (61).

2. The improved radio frequency coaxial cable according to claim 1, characterized in that: The cross section of the protection strip (60) is T-shaped and includes a horizontal portion and a vertical portion, the vertical portion of the T-shape faces the outside of the cable, and the outer anti-bending block (61) and the outer anti-bending groove (62) are located on the vertical portion.

3. The improved radio frequency coaxial cable according to claim 1, characterized in that: The outer anti-bending groove (62) has a narrow bottom and a wide groove opening, and an angle α is formed between two side walls of the outer anti-bending groove (62), wherein the range of the angle α is 40°≤α≤70°.

4. The improved radio frequency coaxial cable according to claim 1, characterized in that: The outer anti-bending groove (62) is filled with elastic foam cotton (63).

5. The improved radio frequency coaxial cable according to claim 1, characterized in that: The central retaining frame (50) comprises a plurality of annularly distributed central protection parts, and assembly grooves (53) for assembling the inner core (10) are formed between the central protection parts; a plurality of central anti-bending blocks (51) are axially arranged on the central protection parts, and central anti-bending grooves (52) are provided between the central anti-bending blocks (51).

6. The improved radio frequency coaxial cable according to claim 5, characterized in that: The bottoms of the outer anti-bending groove (62) and the central anti-bending groove (52) are both provided with rounded corners.

7. The improved radio frequency coaxial cable according to claim 1, characterized in that: The central retaining frame (50) is made of polyetheretherketone (PEEK) or polyimide (PI) material.

8. The improved radio frequency coaxial cable according to claim 1, characterized in that: The protection strip (60) is made of copper alloy or aluminum-magnesium alloy.

9. The improved radio frequency coaxial cable according to claim 1, characterized in that: The insulating layer (20) is made of polytetrafluoroethylene (PTFE) or fluoroethylene propylene (FEP) material.

10. The improved radio frequency coaxial cable according to claim 1, characterized in that: The shielding layer (30) is woven from tinned copper wires and is wrapped with aluminum foil on the outside.

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