A highly shielded radio frequency coaxial cable assembly

Abstract

The utility model relates to coaxial cable technical field discloses a high shielding radio frequency coaxial cable assembly, including the outer sheath, the outer sheet one end fixedly connected with the joint, the joint inboard is installed the spring, the joint inner wall slidingly connected with the sliding block, the sliding block top fixedly connected with the ball, the joint inboard fixedly connected with the limit block, the joint inboard is provided with the copper core, the copper core outside is equipped with the inner layer twill weave copper net, the inner layer twill weave copper net outside is equipped with the middle layer aluminium foil spiral winding, the middle layer aluminium foil spiral winding outside is equipped with the outer layer compact weave copper net. In the utility model, the spring provides the pre-tightening force for the sliding block, and the sliding block drives the ball to cooperate with the limit block to act, when the butt joint interface is big, the ball can be closely attached to the inner wall of the interface to realize temporary fixing, and the design solves the problem that the big interface is difficult to stabilize butt joint, thereby realizing butt joint flexibility and convenience.

Description

Technical Field

[0001] This utility model relates to the field of coaxial cable technology, and in particular to a highly shielded radio frequency coaxial cable assembly. Background Technology

[0002] With the increasing demands for high-frequency signal transmission stability in modern communications, aerospace and other fields, the problems of traditional coaxial cables being susceptible to interference and unstable signal transmission in strong electromagnetic wave environments have become increasingly prominent. High-shield radio frequency coaxial cable assemblies have emerged to address this issue. These assemblies are widely used in industries with stringent signal integrity requirements, such as aerospace exploration, military defense, radar systems, satellite communications, testing and measurement, and medical imaging. They can adapt to the extreme environment of space and also meet the needs of precision equipment on the ground. The high-shield RF coaxial cable assembly adopts a layered design from the inside out. The core includes a silver-plated copper or copper inner conductor for transmitting signals, a low-loss PTFE or foam fluoropolymer insulation layer for electrical isolation, a high-shield structure composed of a double-layer aluminum foil shielding layer and a double-layer copper mesh braiding layer, and an outermost layer of polyvinyl chloride. Some products are also equipped with precision RF connectors to ensure overall performance. The shortcomings of existing technologies are mainly reflected in two aspects. First, the interface docking flexibility is lacking. When facing docking scenarios with size deviations, it is impossible to achieve convenient and stable temporary fixation. It often requires additional auxiliary components to complete the docking, which is cumbersome and has poor adaptability. Second, the signal transmission stability and environmental adaptability are insufficient. The electromagnetic interference protection effect is limited. It is difficult to effectively isolate external interference signals and is prone to internal signal leakage. At the same time, the resistance to complex environments such as humidity is weak, which limits the application scenarios of the components and results in a short service life. To address these issues, a highly shielded radio frequency coaxial cable assembly is proposed. Utility Model Content

[0003] To overcome the above shortcomings, this utility model provides a highly shielded radio frequency coaxial cable assembly, which aims to improve the lack of interface flexibility in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a highly shielded radio frequency coaxial cable assembly, including an outer sheath, a connector fixedly connected to one end of the outer sheath, a spring installed inside the connector, a slider slidably connected to the inner wall of the connector, a ball fixedly connected to the top of the slider, a limit block fixedly connected to the inner side of the connector, and a copper core provided inside the connector.

[0005] As a further description of the above technical solution: The copper core is surrounded by an inner layer of twill-woven copper mesh, the inner layer of twill-woven copper mesh is surrounded by a middle layer of spirally wound aluminum foil, and the middle layer of spirally wound aluminum foil is surrounded by an outer layer of densely woven copper mesh.

[0006] As a further description of the above technical solution: An inner shielding sleeve is provided on the outside of the outer dense woven copper mesh, and the inner shielding sleeve is fixedly connected to the inside of the outer sheath.

[0007] As a further description of the above technical solution: One end of the spring is fixedly connected to the inner wall of the connector, and the other end of the spring is fixedly connected to the bottom of the slider.

[0008] As a further description of the above technical solution: The ball is slidably connected to the inside of the limiting block, and the slider is located at the bottom of the limiting block.

[0009] As a further description of the above technical solution: The outer sheath is provided with a hydrophobic coating.

[0010] This utility model has the following beneficial effects: 1. In this utility model, the spring provides pre-tightening force to the slider, and the slider drives the locking ball to cooperate with the limiting block to move. When the docking interface is too large, the locking ball can fit tightly against the inner wall of the interface to achieve temporary fixation. This design solves the problem that it is difficult to dock a large interface stably, thus realizing docking flexibility and convenience.

[0011] 2. In this utility model, a three-layer shielding structure is adopted, consisting of an inner layer of twill-woven copper mesh, a middle layer of spirally wound aluminum foil, and an outer layer of densely woven copper mesh. Combined with an inner shielding sleeve and an outer protective sleeve, multiple protections are formed, which effectively blocks external electromagnetic interference and prevents internal signal leakage, thus greatly improving the stability of signal transmission and anti-interference capability. Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of a highly shielded radio frequency coaxial cable assembly proposed in this utility model. Figure 2 This is a schematic diagram of the copper core structure of a high-shield radio frequency coaxial cable assembly proposed in this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the outer sheath of a high-shield radio frequency coaxial cable assembly proposed in this utility model.

[0013] Legend: 1. Outer sheath; 2. Connector; 3. Copper core; 4. Spring; 5. Ball catcher; 6. Limiting block; 7. Sliding block; 8. Inner layer twill braided copper mesh; 9. Inner shielding sleeve; 10. Outer layer dense braided copper mesh; 11. Middle layer aluminum foil spiral winding; 12. Hydrophobic coating. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Reference Figures 1-3 One embodiment of this utility model is a highly shielded radio frequency coaxial cable assembly, including an outer sheath 1, a connector 2 fixedly connected to one end of the outer sheath 1, a spring 4 installed inside the connector 2, a slider 7 slidably connected to the inner wall of the connector 2, a ball 5 fixedly connected to the top of the slider 7, a limit block 6 fixedly connected to the inner side of the connector 2, and a copper core 3 provided inside the connector 2.

[0016] A stable signal transmission foundation is built through the coordinated cooperation of various components. The outer sheath 1 provides protective support for the internal components. The connector 2 serves as a connection carrier and provides installation space for components such as the spring 4 and the slider 7. When the interface is too large, the locking ball 5 can be inserted into the interface along with the components and temporarily fixed by the preload of the spring 4. The limiting block 6 can limit the sliding range of the slider 7 to avoid excessive displacement. The copper core 3 undertakes the core signal transmission function.

[0017] Reference Figure 4 The copper core 3 is surrounded by an inner layer of twill woven copper mesh 8, the inner layer of twill woven copper mesh 8 is surrounded by a middle layer of aluminum foil spiral winding 11, and the middle layer of aluminum foil spiral winding 11 is surrounded by an outer layer of dense woven copper mesh 10.

[0018] A progressive shielding and protection system is formed by a multi-layer nested structure. The inner layer of twill-woven copper mesh 8 first shields the signal transmitted by the copper core 3. The middle layer of aluminum foil spiral winding 11 further blocks the penetration of external interference signals. The outer layer of densely woven copper mesh 10 strengthens the shielding effect. The three-layer structure complements each other and can greatly improve the overall anti-interference capability.

[0019] Reference Figure 4 An inner shielding sleeve 9 is provided on the outer side of the densely woven copper mesh 10, and the inner shielding sleeve 9 is fixedly connected to the inner side of the outer sheath 1.

[0020] The inner shielding sleeve 9 is located between the outer dense woven copper mesh 10 and the outer sheath 1. It can provide secondary protection for the shielding structure, preventing the outer dense woven copper mesh 10 from being affected by the external environment. It can also work with the outer sheath 1 to form a double protective barrier, further ensuring the stability of the internal shielding structure and signal transmission components.

[0021] Reference Figure 3 One end of the spring 4 is fixedly connected to the inner wall of the connector 2, and the other end of the spring 4 is fixedly connected to the bottom of the slider 7.

[0022] Spring 4 uses its own elastic properties to provide continuous preload to slider 7. When the mating interface is too large, the preload can be transmitted to ball 5 through slider 7, so that ball 5 fits tightly against the inner wall of the interface to achieve temporary fixation. When slider 7 is subjected to external force and slides along the inner wall of joint 2, spring 4 will deform and store elastic potential energy. When the external force disappears, spring 4 releases elastic potential energy and can drive slider 7 back to the initial position, ensuring that slider 7 can always maintain a stable working state.

[0023] Reference Figure 3 The ball 5 is slidably connected to the inside of the limiting block 6, and the slider 7 is located at the bottom of the limiting block 6.

[0024] The limiting block 6 provides a stable sliding track for the ball 5 through its own structural characteristics, and at the same time precisely limits the sliding stroke of the ball 5 to prevent the ball 5 from leaving the preset working range and affecting the temporary fixing effect. The slider 7 is located at the bottom of the limiting block 6 to ensure that it keeps synchronous linkage with the ball 5 during the sliding process. During the transmission of the pre-tightening force of the spring 4, it ensures the coordination between the components and makes the temporary fixing more reliable.

[0025] Reference Figure 1 The outer sheath 1 has a hydrophobic coating 12 on its outer side.

[0026] The hydrophobic coating 12 covers the surface of the outer sheath 1 and can reduce the adhesion of moisture on the external surface by utilizing its own properties, preventing moisture from penetrating into the interior of the component and affecting the components, thereby improving the adaptability and service life of the entire cable assembly in humid environments.

[0027] Working principle: During operation, the outer sheath 1 provides protective support for the internal components. Its hydrophobic coating 12 reduces moisture adhesion and prevents moisture penetration. The inner shielding sleeve 9, fixedly connected to the inner side of the outer sheath 1, works with the outer dense woven copper mesh 10 to form a protective barrier. The outer dense woven copper mesh 10, the middle layer of aluminum foil spiral winding 11, and the inner layer of twill woven copper mesh 8 form a progressive shielding protection system through a three-layer nested structure, which sequentially blocks the penetration of external interference signals and prevents internal signal leakage. The copper core 3 undertakes the core signal transmission function. The connector 2, fixedly connected to one end of the outer sheath 1, provides installation space for components such as the spring 4, slider 7, and limit block 6. One end of the spring 4 is fixedly connected to the inner wall of the connector 2, and the other end is fixed. Connected to the bottom of slider 7, the spring 4 provides continuous preload force to slider 7 using its own elastic properties. Sliding slider 7 slides along the inner wall of connector 2, and the ball 5 fixedly connected to the top slides inside the limiting block 6. The limiting block 6 precisely limits the sliding stroke of ball 5 and restricts excessive displacement of slider 7. When the docking interface is too large, the preload force of spring 4 is transmitted to ball 5 through slider 7, so that ball 5 fits tightly against the inner wall of the interface to achieve temporary fixation. After the external force disappears, spring 4 releases elastic potential energy to drive slider 7 back to the initial position. The coordinated cooperation of each component not only ensures the stability and anti-interference capability of high-frequency signal transmission, but also realizes the function of temporary fixation for oversized interfaces, and improves the adaptability of the component in complex environments.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A highly shielded radio frequency coaxial cable assembly, comprising an outer sheath (1), characterized in that: One end of the outer sheath (1) is fixedly connected to a connector (2), a spring (4) is installed inside the connector (2), a slider (7) is slidably connected to the inner wall of the connector (2), a ball (5) is fixedly connected to the top of the slider (7), a limit block (6) is fixedly connected to the inner side of the connector (2), and a copper core (3) is provided inside the connector (2).

2. The highly shielded radio frequency coaxial cable assembly according to claim 1, characterized in that: The copper core (3) is covered with an inner layer of twill woven copper mesh (8), the inner layer of twill woven copper mesh (8) is covered with a middle layer of aluminum foil spiral winding (11), and the middle layer of aluminum foil spiral winding (11) is covered with an outer layer of dense woven copper mesh (10).

3. The highly shielded radio frequency coaxial cable assembly according to claim 2, characterized in that: The outer layer of densely woven copper mesh (10) is provided with an inner shielding sleeve (9), which is fixedly connected to the inner side of the outer sheath (1).

4. The highly shielded radio frequency coaxial cable assembly according to claim 1, characterized in that: One end of the spring (4) is fixedly connected to the inner wall of the connector (2), and the other end of the spring (4) is fixedly connected to the bottom of the slider (7).

5. The highly shielded radio frequency coaxial cable assembly according to claim 1, characterized in that: The ball (5) is slidably connected to the inside of the limiting block (6), and the slider (7) is located at the bottom of the limiting block (6).

6. The highly shielded radio frequency coaxial cable assembly according to claim 1, characterized in that: The outer sheath (1) is provided with a hydrophobic coating (12) on the outside.

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