Shielding structure and cable assembly

Abstract

The utility model provides a shielding structure and a cable assembly, and relates to the technical field of cables. The shielding structure comprises an elastic braided structure, and the elastic braided structure is provided with an accommodating space which is used for accommodating at least one cable. And the conductive structure is connected with the elastic braided structure to form a circumferential seamless accommodating space, and the conductive structure is used for conductive lap joint to enable the shielding structure to have a shielding effect.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to a shielding structure and a cable assembly. Background Art

[0002] The shielding material of the cable is generally made of conductive cloth, which is wrapped around the signal line or the entire cable pair that needs to be shielded to achieve the shielding effect, or it can be covered with a metal braided mesh. However, the conductive cloth wrapping method causes the insulating material surface of the conductive cloth shielding layer to press against the conductive material surface, resulting in discontinuity of the shielding layer and greatly reducing the shielding efficiency. In addition, the winding process requires more delicate manual operations, which increases labor costs, and there will be errors between different operators, making it difficult to control the consistency of the product. If a metal braided mesh is used for covering, a thicker and harder rubber sleeve is usually required on the outside of the metal shielding mesh, which is heavier and larger in size, and the metal braided mesh is easy to break after multiple bends, which greatly affects the shielding effect. Utility Model Content

[0003] The purpose of the embodiment of the present application is to provide a shielding structure, and the embodiment of the present application provides the following technical solutions:

[0004] The first aspect of the present application provides a shielding structure, including: an elastic braided structure, the elastic braided structure having a housing space for accommodating at least one cable; a conductive structure, connected to the elastic braided structure to form a housing space with a circumferential seamless gap, the conductive structure being used for conductive overlap to enable the shielding structure to have a shielding effect.

[0005] In some embodiments of the present application, the elastic woven structure is a columnar structure woven from a plurality of polyester fiber filaments.

[0006] In some embodiments of the present application, the polyester fiber filaments are spandex filaments.

[0007] In some embodiments of the present application, the conductive structure includes: a plurality of conductive fiber filaments, each of the conductive fiber filaments being wrapped around an outer surface of one of the polyester fiber filaments.

[0008] In some embodiments of the present application, the conductive fiber filaments are made of carbon nanotube fibers.

[0009] In some embodiments of the present application, the conductive structure further includes: a plurality of metal film layers, each of the metal film layers being attached to an outer surface of one of the conductive fiber filaments.

[0010] In some embodiments of the present application, the metal film layer is a thin film layer formed by depositing a plurality of copper particles on the surface of the conductive fiber filament.

[0011] In some embodiments of the present application, the coverage thickness of the metal film layer is at least 3 microns.

[0012] In some embodiments of the present application, the shielding structure is a cylindrical seamless overlapping structure, and both ends of the shielding structure are respectively provided with overlapping ends for electrical connection with a connector.

[0013] A second aspect of the present application provides a cable assembly, comprising the shielding structure provided in the first aspect of the present application and a cable, wherein the shielding structure is sleeved outside at least one of the cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0015] Figure 1 The structure diagram of a shielding structure of an exemplary embodiment of the present application is schematically shown;

[0016] Figure 2 A schematic diagram of a structure in which conductive fiber filaments are wrapped around the outer surface of polyester fiber filaments in a shielding structure of an exemplary embodiment of the present application is schematically shown;

[0017] Figure 3 The schematic diagram of the structure of the connection between the metal film layer and the conductive fiber filament in the shielding structure of an exemplary embodiment of the present application is schematically shown.

[0018] Description of Figure Numbers:

[0019] 1. Accommodating space; 2. Polyester fiber; 3. Conductive fiber; 4. Copper particles. DETAILED DESCRIPTION

[0020] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0021] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which this application belongs.

[0022] Example 1

[0023] An embodiment of the present application provides a shielding structure, including: an elastic braided structure, the elastic braided structure having a housing space 1 for accommodating at least one cable; a conductive structure, connected to the elastic braided structure to form a circumferential seamless housing space 1, the conductive structure being used for conductive overlap to enable the shielding structure to have a shielding effect.

[0024] like Figure 1 As shown, the elastic braided structure is the basis of the shielding structure and can be made of elastic insulating material through a specific braiding process. The braiding method can be ring-shaped, spiral or other composite patterns to ensure the elasticity of the structure. The elastic braided structure can be enclosed into an integrated cylindrical structure with no obvious gaps on the surface through the braiding process, and the center has a receiving space 1. Due to the elasticity and integrated structure of the elastic braided structure, this receiving space 1 is retractable and can easily wrap at least one cable, whether it is round, flat or irregularly shaped cables, can be well adapted and fixed.

[0025] By combining the conductive structure with the elastic braided structure to form a circumferentially seamless structure, a continuous conductive path can be formed to achieve an electromagnetic shielding effect. This not only strengthens the protection against external electromagnetic interference, but also forms a good seal through the seamless design, further improving the shielding effectiveness.

[0026] The embodiments of the present application provide a shielding structure with elastic and conductive properties, so that the shielding structure can not only ensure a high level of electromagnetic shielding performance, but also be able to expand and contract with the movement of the cable, and maintain structural integrity even under conditions of frequent bending or stretching, thereby providing a high degree of flexibility and reliability.

[0027] In some embodiments, the elastic braided structure is a columnar structure braided from a plurality of polyester fiber filaments 2 .

[0028] Polyester fiber is a common synthetic fiber with good electrical insulation and mechanical elasticity. The polyester fiber filaments 2 are formed into a columnar mesh tube with a three-dimensional structure through a precise weaving process, such as warp knitting, weft knitting or interweaving, similar to stockings, so as to ensure that the elastic weaving structure has sufficient elasticity and a certain support force in both radial and axial directions, so as to tightly wrap the cable and maintain good contact and protection no matter how the cable bends or moves.

[0029] In some embodiments, the polyester filaments 2 are spandex filaments.

[0030] Spandex is a synthetic fiber with excellent elastic recovery. After being stretched and releasing external force, it can quickly return to its original shape with almost no permanent deformation. The use of spandex filaments significantly improves the elastic range and recovery ability of the shielding structure, and its lightweight characteristics make the shielding structure light while ensuring high strength and high elasticity, thereby reducing the overall weight of the cable and facilitating the lightweighting of the system.

[0031] In some embodiments, the conductive structure includes: a plurality of conductive fiber threads 3 , each conductive fiber thread 3 being wrapped around an outer surface of a polyester fiber thread 2 .

[0032] like Figure 2 As shown, the conductive structure uses a plurality of conductive fiber filaments 3, which are directly integrated into the elastic woven structure and tightly and evenly wound around the outer surface of each polyester fiber filament 2 through a wrapping process, which not only forms a continuous conductive path, but also constructs a three-dimensional conductive network, ensuring that each part of the shielding structure has conductivity, thereby enhancing the conductive continuity and overall shielding effectiveness. The conductive fiber filaments 3 can be made of silver-plated or nickel-plated metal wires or synthetic fibers containing carbon nanotubes and metallized fibers, and have good conductive properties.

[0033] By directly wrapping the conductive fiber filaments 3 around the polyester fiber filaments 2, the circumferential seamless conductive continuity of the entire shielding structure is ensured, greatly improving the shielding effectiveness against electromagnetic interference. In addition, the wrapping process can well preserve the elasticity of the spandex, and the conductive network remains continuous even in a bent or stretched state, effectively blocking external interference and protecting the integrity of the internal signal.

[0034] In some embodiments, the conductive fiber filaments 3 are made of carbon nanotube fibers.

[0035] Carbon nanotube fibers have high electrical conductivity and high mechanical strength. Compared with traditional metal-plated conductive fibers, the diameter of carbon nanotube fibers can reach micrometers, which can provide better electrical conductivity and lighter weight. The high strength and high toughness of carbon nanotube fibers, combined with the elasticity of polyester fiber filaments 2, together give the shielding structure excellent elasticity, electrical conductivity and lightweight characteristics.

[0036] In some embodiments, the conductive structure further includes: a plurality of metal film layers, each of which is attached to the outer surface of a conductive fiber filament 3 .

[0037] On the basis of the original conductive fiber filaments 3, one or more layers of metal film are uniformly coated or bonded to the outer surface of each conductive fiber filament 3 through physical vapor deposition, chemical vapor deposition or electroplating and other technologies. That is, there is a conductive fiber filament 3 in the middle, and a layer of metal film is wrapped on its outer surface. The metal film layer can be made of metal materials such as copper, silver, nickel, etc. with good conductivity and electromagnetic wave reflection characteristics to enhance the overall conductivity and shielding effect. By adding a metal film layer to the outer surface of the conductive fiber filament 3, the shielding structure can achieve more efficient and comprehensive shielding of electromagnetic interference while maintaining elasticity, and further increase the mechanical strength and wear resistance of the conductive fiber filament 3, making the entire shielding structure more sturdy and durable.

[0038] In some embodiments, the metal film layer is a thin film layer formed by depositing a plurality of copper particles 4 on the surface of the conductive fiber filament 3 .

[0039] like Figure 3 As shown, by using advanced technologies such as physical vapor deposition, chemical vapor deposition or electroplating, multiple micron-sized copper particles 4 are closely arranged on the outer surface of the conductive fiber filament 3 to form a continuous and uniform metal film layer. Both the polyester fiber filament 2 and the conductive fiber filament 3 have the characteristics of light weight. Although copper is attached to the surface of the conductive fiber filament 3, it is still significantly lightweight as a whole due to its micron-sized thickness.

[0040] The copper particles 4 are attached to the surface of the carbon nanotube fibers by a deposition method, so that the copper particles 4 have the advantage of not being easy to fall off. In actual use, the falling off of the copper particles 4 will not cause a short circuit on the printed circuit board of the product.

[0041] The polyester fiber filaments 2 provide basic mechanical elasticity, the conductive fiber filaments 3 (such as carbon nanotube fibers) construct a preliminary conductive path, and the metal film layer formed by the deposition of copper particles 4 is on the outermost layer. The three-layer structure interacts with each other to form a composite shielding structure that is both flexible and can effectively shield electromagnetic interference.

[0042] As a metal with excellent conductivity, the thin film layer formed by the deposition of copper particles greatly improves the conductive continuity of the shielding structure, and can effectively reflect and absorb electromagnetic waves, especially the shielding effect of high-frequency electromagnetic interference is significantly enhanced, protecting the internal circuits and signals from external interference. At the same time, compared with other precious metals, the cost of copper is lower, which is conducive to reducing the manufacturing cost of the overall shielding structure.

[0043] The conductivity can be controlled by adjusting the covering thickness of the copper particles 4 according to actual conditions. The thicker the metal film layer, the better the conductivity.

[0044] In some embodiments, the metal film layer has a coverage thickness of at least 3 micrometers.

[0045] The 3-micron metal film thickness is a critical threshold, which ensures sufficient metal layer density and thickness to effectively reflect and absorb electromagnetic waves, especially for higher frequency electromagnetic interference, thereby significantly enhancing the shielding effect. The 3-micron thickness is sufficient to provide stable shielding effectiveness in various frequency ranges, effectively isolate external electromagnetic interference, and protect the purity of internal signals.

[0046] In some embodiments, the shielding structure is a cylindrical seamless overlapping structure, and both ends of the shielding structure are respectively provided with overlapping ends for electrical connection with the connector.

[0047] Specifically, a plurality of tiny copper particles 4 are deposited and closely arranged on the outer surface of the conductive fiber filament 3 by a deposition method to form a continuous and uniform metal film layer, thereby forming a conductive fiber filament 3 with a composite structure, and then the polyester fiber filament 2 is used as the core yarn, and the conductive fiber filament 3 with a composite structure is wrapped on the outer surface of the polyester fiber filament 2 by a wrapping process, and finally the polyester fiber filament 2 with the conductive fiber filament 3 on the surface is woven into a seamless cylindrical shape by a weaving process. Making its surface a continuous and seamless structure means that there is no physical gap in the entire circumference around the cable, thereby forming a closed electromagnetic shielding layer, which effectively blocks the leakage and intrusion of electromagnetic waves.

[0048] Different from the prior art, the insulating material surface of the conductive cloth shielding layer is pressed against the conductive material surface by wrapping or winding the conductive cloth, resulting in discontinuity of the shielding layer and reduced shielding effectiveness. The shielding structure of the present application can be directly sleeved on the outer periphery of the cable, and the circumferential tight wrapping of the cable can be achieved without the need for additional connection means. Although tiny gaps may appear between the multiple polyester fiber filaments 2 when they are stretched apart by the cable, the conductive fiber filaments 3 and copper particles 4 used inside are all nanometer-level, and these microscopic gaps are almost negligible at the macro level, so the shielding structure can still maintain an excellent electromagnetic shielding effect. And due to the flexibility and elasticity of the shielding structure, it can be bent at will without being easily damaged.

[0049] Both ends of the cylindrical shielding structure are open structures so that it can be put on the outside of the cable, just like wearing stockings. Both ends of the shielding structure are provided with overlapping ends, which can be overlapped with the connector through contact pieces, threaded interfaces, snap-on connection components or conductive adhesives. The specific overlapping method is not limited, but it is necessary to achieve 360-degree circular overlap, so that they are not only physically closely connected to the connector of the cable, but also ensure electrical continuity, thereby extending the shielding effect to the inside of the connector and achieving a seamless transition from cable to connector. These overlapping ends can be customized according to different types of connectors to ensure compatibility and ease of installation. The overlapping ends at both ends simplify the docking process between the shielding structure and the cable connector. The user only needs to put the shielding structure on the outside of the cable, and then perform simple operations to achieve electrical connection. There is no need for complicated assembly steps, which reduces the difficulty and time cost of installation.

[0050] Example 2

[0051] The shielding structure provided in Example 2 of the present application is different from that in Example 1 in that another connection form between the conductive structure and the elastic braided structure is provided.

[0052] In some embodiments, the elastic braided structure is a seamless cylindrical shape formed by weaving a plurality of polyester fiber yarns 2, and the conductive structure is a plurality of conductive fiber yarns 3 with metal film layers on the surface coated on the outer layer or inner layer of the formed elastic braided structure, thereby ensuring continuous conductivity of the inner surface or outer surface of the entire accommodating space 1. By coating the conductive fiber yarns 3 with metal film layers on the inner and outer surfaces of the elastic braided structure, not only omnidirectional electromagnetic shielding of the shielding structure is achieved, but also the shielding structure can be expanded and contracted with the movement of the cable, and the structural integrity can be maintained even under conditions of frequent bending or stretching, providing a high degree of flexibility and reliability.

[0053] Example 3

[0054] An embodiment of the present application provides a cable assembly, including the shielding structure provided by Embodiment 1 and Embodiment 2 of the present application, and the shielding structure can be sleeved outside at least one cable.

[0055] The cable assembly includes at least one cable, which may contain a conductor (such as a copper wire), an insulating layer, etc. The insulating layer is wrapped around the outer surface of the copper wire, and the shielding structure is sleeved outside the insulating layer. The cable assembly effectively isolates external electromagnetic interference by adopting the above-mentioned shielding structure. The elastic braided structure and the reinforcement of the conductive structure not only maintain the flexibility of the cable, but also enhance its ability to resist mechanical damage and environmental factors (such as friction and corrosion), thereby extending the service life of the cable assembly. The overlapping end design of the shielding structure simplifies the connection process with the external connector, is easy to install and disassemble, and reduces maintenance costs and complexity.

[0056] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A shielding structure, characterized in that: include: An elastic braided structure, wherein the elastic braided structure has a receiving space for receiving at least one cable; The conductive structure is connected with the elastic braided structure to form the accommodating space with no circumferential gaps, and the conductive structure is used for conductive overlap to enable the shielding structure to have a shielding effect.

2. The shielding structure according to claim 1, characterized in that: The elastic braided structure is a columnar structure braided from a plurality of polyester fiber filaments.

3. The shielding structure according to claim 2, characterized in that: The polyester fiber yarn is spandex filament.

4. The shielding structure according to claim 2, characterized in that: The conductive structure comprises: A plurality of conductive fiber threads, each of which is wrapped around the outer surface of one of the polyester fiber threads.

5. The shielding structure according to claim 4, characterized in that: The conductive fiber filaments are made of carbon nanotube fibers.

6. The shielding structure according to claim 4, characterized in that: The conductive structure further comprises: A plurality of metal film layers, each of which is attached to the outer surface of one of the conductive fiber threads.

7. The shielding structure according to claim 6, characterized in that: The metal film layer is a thin film layer formed by depositing a plurality of copper particles on the surface of the conductive fiber.

8. The shielding structure according to claim 6, characterized in that: The coverage thickness of the metal film layer is at least 3 microns.

9. The shielding structure according to claim 1, characterized in that: The shielding structure is a cylindrical seamless overlapping structure, and both ends of the shielding structure are respectively provided with overlapping ends for electrical connection with a connector.

10. A cable assembly, characterized in that: The invention comprises a cable and a shielding structure according to any one of claims 1 to 9, wherein the shielding structure is sleeved outside at least one of the cables.

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