A compact anti-interference cable

Abstract

The utility model discloses a compact anti -interference cable, including cable main part, the cable main part from inside to outside includes conductor, insulating layer, composite shielding layer and outer sheath in proper order, each layer coaxial setting, the insulating layer is tightly covered in the conductor outside, the insulating layer is covered in the conductor surface through extrusion forming process, its inner wall and the conductor outer wall tightly fit, the composite shielding layer is covered in the insulating layer outside, the composite shielding layer is double -layer composite structure, the composite shielding layer from inside to outside is in proper order inside layer aluminum -plastic composite tape around the package layer and outer layer tinned copper wire braided layer, the outer sheath is covered in the composite shielding layer outside, one end of cable main part is connected with the connector. The utility model discloses through setting up metal ring and plastic jacket, the inside of sealing cap is fixed to the composite shielding layer and is pressed tightly, has effectively prevented the loosening of shielding layer in the connector inside, has guaranteed the stability and shielding effect of shielding layer.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a compact anti-interference cable. Background Technology

[0002] In fields such as electronic equipment, automotive electronics, and industrial control, cables are key components for signal and power transmission, and their performance directly affects the stability of the entire system. Currently, when connecting anti-interference cables to connectors, the inner shielding layer of the cable is often twisted into a single strand and inserted into the connector. This makes the shielding layer prone to loosening, affecting the shielding effect. Furthermore, most cables use a single shielding layer (such as a metal braided layer or a metal tape wrapping layer) to achieve anti-interference functionality. However, a single shielding layer has limited shielding effectiveness against electromagnetic interference (EMI) and radio frequency interference (RFI), making it difficult to meet the needs of use in complex electromagnetic environments. At the same time, in order to improve anti-interference capabilities, some cables increase the thickness of the shielding layer or add multi-layer shielding structures, but this results in an increase in the overall diameter of the cable and a bulky structure, making it unsuitable for wiring in confined spaces. Utility Model Content

[0003] The purpose of this invention is to provide a compact anti-interference cable to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a compact anti-interference cable, comprising a cable body, which includes, from the inside out, a conductor, an insulation layer, a composite shielding layer, and an outer sheath, all layers being coaxially arranged. The insulation layer tightly covers the outside of the conductor and is formed by extrusion molding, with its inner wall tightly fitted to the outer wall of the conductor. The composite shielding layer covers the outside of the insulation layer and has a double-layer composite structure, consisting of an inner aluminum-plastic composite tape wrapping layer and an outer tin-plated copper wire braided layer. The outer sheath covers the outside of the composite shielding layer. One end of the cable body is connected to a connector, and a sealing cap is installed on the back of the connector via a threaded connection. The sealing cap is fitted onto the outside of the cable body, and a metal ring and a plastic sleeve are installed inside the sealing cap. The plastic sleeve is fitted onto one end of the metal ring, and the composite shielding layer is pressed against the outer surface of the metal ring by the plastic sleeve.

[0005] Preferably, the metal ring and the plastic sleeve are fitted around the outer ring of the conductor and the insulating layer, and the end face of the plastic sleeve is provided with a serrated portion.

[0006] Preferably, the composite shielding layer is distributed on the serrated portion and pressed against the outer surface of the metal ring by the serrated portion. The metal ring and the plastic jacket are pressed into the inside of the connector by the sealing cap.

[0007] Preferably, the conductor is made of multiple strands of soft copper wire twisted together, the number of strands of the conductor is 7-19, the diameter of a single copper wire is 0.08-0.15mm, the diameter of the conductor after twisting is 0.2-0.5mm, and the surface of the copper wire is tin-plated.

[0008] Preferably, the insulating layer is made of polytetrafluoroethylene material; the thickness of the insulating layer is 0.1-0.3 mm.

[0009] Preferably, the inner aluminum-plastic composite tape wrapping layer is made of aluminum-plastic composite tape with a thickness of 0.02-0.05mm.

[0010] Preferably, the outer tin-plated copper wire braided layer is made of tin-plated copper wire with a diameter of 0.05-0.08 mm.

[0011] Preferably, the total thickness of the composite shielding layer is 0.05-0.15 mm.

[0012] Preferably, the outer sheath is made of low-smoke, halogen-free, flame-retardant polyolefin material, and the thickness of the outer sheath is 0.2-0.4 mm.

[0013] Preferably, the outer sheath is coated onto the surface of the composite shielding layer by an extrusion molding process, and its inner wall is tightly fitted to the outer wall of the composite shielding layer.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes a metal ring and a plastic sleeve to press and secure the composite shielding layer inside the sealing cover, effectively preventing the shielding layer from loosening inside the connector and ensuring its stability and shielding effect. Simultaneously, the design of the metal ring and plastic sleeve enhances the connection strength between the cable and the connector, improving the cable's anti-interference capability and service life.

[0015] This invention employs a double-layer composite shielding layer, consisting of an inner aluminum-plastic composite tape wrapping layer and an outer tin-plated copper wire braiding layer. This significantly improves the shielding effect of the cable against electromagnetic interference (EMI) and radio frequency interference (RFI), enabling it to better adapt to the needs of use in complex electromagnetic environments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal structure of the end face of this utility model; Figure 2 This is a schematic diagram of the side unfolded structure of this utility model; Figure 3 This is a side view of the present invention.

[0017] In the diagram: 1. Cable body; 2. Conductor; 3. Insulation layer; 4. Composite shielding layer; 5. Outer sheath; 6. Inner aluminum-plastic composite tape wrapping layer; 7. Outer tin-plated copper wire braided layer; 8. Connector; 9. Sealing cap; 10. Metal ring; 11. Plastic jacket; 12. Serrated section. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1-3 This utility model provides a compact anti-interference cable technical solution: It includes a cable body 1, which, from the inside out, comprises a conductor 2, an insulation layer 3, a composite shielding layer 4, and an outer sheath 5, all arranged coaxially. The insulation layer 3 tightly covers the outside of the conductor 2, and is formed by extrusion molding, with its inner wall tightly fitted to the outer wall of the conductor 2. The composite shielding layer 4 covers the outside of the insulation layer 3 and has a double-layer composite structure. The composite shielding layer 4, from the inside out, comprises... The cable body 1 consists of an inner aluminum-plastic composite tape wrapping layer 6 and an outer tin-plated copper wire braided layer 7. The outer sheath 5 covers the composite shielding layer 4. One end of the cable body 1 is connected to a connector 8. A sealing cap 9 is installed on the back of the connector 8 by means of a threaded connection. The sealing cap 9 is fitted on the outside of the cable body 1. A metal ring 10 and a plastic sleeve 11 are installed inside the sealing cap 9. The plastic sleeve 11 is fitted on one end of the metal ring 10. The composite shielding layer 4 is pressed against the outer surface of the metal ring 10 by the plastic sleeve 11.

[0020] Furthermore, the metal ring 10 and the plastic sleeve 11 are fitted around the outer ring of the conductor 2 and the insulating layer 3. The end face of the plastic sleeve 11 is provided with a serrated portion 12. The composite shielding layer 4 is distributed on the serrated portion 12 and is pressed against the outer surface of the metal ring 10 through the serrated portion 12. The metal ring 10 and the plastic sleeve 11 are pressed into the inside of the connector 8 by the sealing cover 9.

[0021] In this embodiment, when installing the connector, the composite shielding layer 4 can be distributed on the serrated portion 12 of the end face of the plastic sleeve 11. Then, by rotating the plastic sleeve 11, the composite shielding layer 4 can be covered on the outer surface of the metal ring 10. In this way, the composite shielding layer 4 can be fixed by the cooperation of the plastic sleeve 11 and the metal ring 10, preventing the composite shielding layer 4 from moving or loosening inside the cable body 1, thereby improving the anti-interference performance of the cable.

[0022] Furthermore, the conductor 2 is made of multiple strands of soft copper wire twisted together. The conductor 2 has 7-19 strands, and the diameter of a single copper wire is 0.08-0.15mm. The diameter of the conductor 2 after twisting is 0.2-0.5mm. The surface of the copper wire is tin-plated with a tin layer thickness of 0.005-0.01mm. The tin plating treatment on the surface of the copper wire not only enhances the oxidation resistance of the conductor, but also improves its corrosion resistance and conductivity stability.

[0023] Furthermore, the insulating layer 3 is made of polytetrafluoroethylene (PTFE) material, and the thickness of the insulating layer 3 is 0.1-0.3 mm. PTFE material has extremely low dielectric constant and dielectric loss, which can effectively reduce attenuation and interference during signal transmission and ensure the quality of signal transmission.

[0024] Furthermore, the inner aluminum-plastic composite tape wrapping layer 6 is made of aluminum-plastic composite tape with a thickness of 0.02-0.05mm, and the outer tin-plated copper wire braided layer 7 is made of tin-plated copper wire with a diameter of 0.05-0.08mm. The total thickness of the composite shielding layer 4 is 0.05-0.15mm. The inner aluminum-plastic composite tape wrapping layer 6 and the outer tin-plated copper wire braided layer 7 further enhance the shielding effect of the cable.

[0025] Furthermore, the outer sheath 5 is made of low-smoke halogen-free flame-retardant polyolefin LSZH material, and the thickness of the outer sheath 5 is 0.2-0.4mm. The outer sheath 5 is coated on the surface of the composite shielding layer 4 by extrusion molding process, and its inner wall is tightly attached to the outer wall of the composite shielding layer 4.

[0026] Working Principle: In use, one end of the cable body 1 is first connected to other equipment or lines via connector 8. The sealing cap 9 seals the connection between connector 8 and cable body 1, preventing external moisture or dust from entering the connector 8 and affecting its connection performance and lifespan. Simultaneously, the metal ring 10 and plastic sleeve 11 work together to secure the composite shielding layer 4, preventing it from moving or loosening inside the cable body 1, further improving the cable's anti-interference performance. Furthermore, the outer sheath 5, made of low-smoke halogen-free flame-retardant polyolefin LSZH material, not only has excellent flame-retardant properties but also produces less smoke and toxic gases during combustion, improving the cable's safety performance.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compact anti-interference cable, comprising a cable body (1), characterized in that: The cable body (1) consists of a conductor (2), an insulation layer (3), a composite shielding layer (4), and an outer sheath (5) from the inside out. Each layer is coaxially arranged. The insulation layer (3) tightly covers the outside of the conductor (2). The insulation layer (3) is formed by extrusion molding and is applied to the surface of the conductor (2). Its inner wall is tightly attached to the outer wall of the conductor (2). The composite shielding layer (4) covers the outside of the insulation layer (3). The composite shielding layer (4) is a double-layer composite structure. From the inside out, the composite shielding layer (4) consists of an inner aluminum-plastic composite tape wrapping layer (6) and an outer tin-plated copper layer. The cable body (1) is connected to a connector (8) at one end. A sealing cap (9) is installed on the back of the connector (8) by means of a threaded connection. The sealing cap (9) is fitted on the outside of the cable body (1). A metal ring (10) and a plastic sleeve (11) are installed inside the sealing cap (9). The plastic sleeve (11) is fitted on one end of the metal ring (10). The composite shielding layer (4) is pressed against the outer surface of the metal ring (10) by the plastic sleeve (11).

2. The compact anti-interference cable according to claim 1, characterized in that: The metal ring (10) and the plastic sleeve (11) are fitted around the outer ring of the conductor (2) and the insulating layer (3), and the end face of the plastic sleeve (11) is provided with a serrated part (12).

3. The compact anti-interference cable according to claim 2, characterized in that: The composite shielding layer (4) is distributed on the serrated part (12) and pressed against the outer surface of the metal ring (10) by the serrated part (12). The metal ring (10) and the plastic jacket (11) are pressed into the inside of the connector (8) by the sealing cover (9).

4. A compact anti-interference cable according to claim 3, characterized in that: The conductor (2) is made of multiple strands of soft copper wire. The conductor (2) has 7-19 strands, and the diameter of a single copper wire is 0.08-0.15mm. The diameter of the conductor (2) after stranding is 0.2-0.5mm. The surface of the copper wire is tin-plated.

5. A compact anti-interference cable according to claim 4, characterized in that: The insulating layer (3) is made of polytetrafluoroethylene material and the thickness of the insulating layer (3) is 0.1-0.3 mm.

6. A compact anti-interference cable according to claim 5, characterized in that: The inner aluminum-plastic composite wrapping layer (6) is made of aluminum-plastic composite tape with a thickness of 0.02-0.05mm.

7. A compact anti-interference cable according to claim 6, characterized in that: The outer tin-plated copper wire braided layer (7) is made of tin-plated copper wire with a diameter of 0.05-0.08 mm.

8. A compact anti-interference cable according to claim 7, characterized in that: The total thickness of the composite shielding layer (4) is 0.05-0.15 mm.

9. A compact anti-interference cable according to claim 8, characterized in that: The outer sheath (5) is made of low-smoke halogen-free flame-retardant polyolefin material, and the thickness of the outer sheath (5) is 0.2-0.4mm.

10. A compact anti-interference cable according to claim 9, characterized in that: The outer sheath (5) is wrapped around the surface of the composite shielding layer (4) by an extrusion molding process, and its inner wall is tightly attached to the outer wall of the composite shielding layer (4).

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