Anti-interference signal line

Abstract

The utility model discloses an anti-interference signal line, which is provided with an insulating jacket, a first shielding layer, a second shielding layer and a third shielding layer from outside to inside, a ground wire is arranged between the first shielding layer and the second shielding layer, a first core wire is arranged between the second shielding layer and the third shielding layer, and a second core wire is arranged in the third shielding layer. According to the utility model, the three shielding layers are arranged from outside to inside, and the ground wire, the first core wire and the third core wire are arranged in different shielding layers, so that cables with different functions or transmitting different types of signals can be shielded and isolated, and the cables can be arranged in different shielding layers according to the sensitivity of the signal types to external electromagnetic interference; the cable is ensured to have excellent anti-interference performance and signal transmission stability; the internal second shielding layer and the internal third shielding layer are arranged to be of a structure tightly wrapping the surfaces of the internal core wires, so that the core wires can be fixed without filler, and core wire abrasion caused by relative movement or friction between the core wires in the cable moving process is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wires and cables, in particular to an anti-interference signal line. Background Art

[0002] As a medium for transmitting photoelectric signals, wires and cables play a vital role in the normal use of electronic equipment and products. With the rapid development of electronic technology, various electronic equipment and products have been increasingly used in industrial production in various fields and in people's daily lives. In order to ensure the normal and stable operation of electronic equipment and products, it is necessary to improve the signal transmission efficiency and anti-interference performance of cables. Utility Model Content

[0003] In response to the problems existing in the above-mentioned prior art, the utility model provides an anti-interference signal cable, which can isolate the cable shields with different functions or transmitting different types of signals, and can place them in different shielding layers according to the sensitivity of their signal types to external electromagnetic interference, thereby ensuring that the cable has excellent anti-interference performance and signal transmission stability, and can fix each core wire without fillers and reduce the wear of the core wires caused by relative movement or friction between the core wires during the movement of the cable.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is as follows:

[0005] An anti-interference signal line is provided with an insulating outer sheath, a first shielding layer, a second shielding layer and a third shielding layer from the outside to the inside, a ground wire is provided between the first shielding layer and the second shielding layer, two or more first core wires are provided between the second shielding layer and the third shielding layer, and three or more second core wires are provided in the third shielding layer.

[0006] As a further elaboration of the above technical solution:

[0007] In the above technical solution, the first shielding layer is an annular aluminum-magnesium wire braided layer, and its outer wall is attached to the inner wall of the insulating outer jacket.

[0008] In the above technical solution, the second shielding layer is an irregular aluminum foil shielding layer, the third shielding layer and a plurality of the first core wires are closely attached to its inner wall, and the ground wire is closely attached to its outer wall.

[0009] In the above technical solution, the third shielding layer is an irregular aluminum foil shielding layer, a number of the second core wires are closely attached to its inner wall, and a number of the second core wires are closely attached to its outer wall.

[0010] In the above technical solution, the insulating outer sheath is a flexible PVC outer sheath.

[0011] In the above technical solution, each of the first core wire and the second core wire comprises an insulating sheath and a copper stranded wire from the outside to the inside, and each of the copper stranded wires is formed by twisting two or more copper core wires.

[0012] In the above technical solution, each of the copper core wires is a tinned copper core wire.

[0013] Compared with the prior art, the beneficial effects of the utility model are: by setting three shielding layers from the outside to the inside, and placing the ground wire, the first core wire and the third core wire in different shielding layers, the cable shields with different functions or transmitting different types of signals can be isolated, and they can be placed in different shielding layers according to the sensitivity of their signal types to external electromagnetic interference, ensuring that the cable has excellent anti-interference performance and signal transmission stability; by setting the internal second shielding layer and the third shielding layer to a structure tightly wrapped around the surface of the internal core wire, each core wire can be fixed without filler and the core wire wear caused by relative movement or friction between the core wires during the movement of the cable can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the cross-sectional structure of this embodiment;

[0015] Figure 2 Schematic diagram of the cross-sectional structure of the first core wire and the second core wire in this embodiment.

[0016] In the figure: 1. Insulating outer coating; 2. First insulating layer; 3. Second insulating layer; 4. Third insulating layer; 5. Ground wire; 6. First core wire; 7. Second core wire; 8. Insulating sheath; 9. Copper core wire. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0018] The embodiments described with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and cannot be understood as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "several" and "multiple" mean two or more, unless otherwise clearly and specifically defined. In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In this application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature can include the first and second features being in direct contact, or it can include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0019] like Figure 1-2 As shown, an anti-interference signal line is provided with an insulating outer sheath 1, a first shielding layer 2, a second shielding layer 3 and a third shielding layer 4 from the outside to the inside, a ground wire 5 is provided between the first shielding layer 2 and the second shielding layer 3, two or more first core wires 6 are provided between the second shielding layer 3 and the third shielding layer 4, and three or more second core wires 7 are provided in the third shielding layer 4.

[0020] The utility model sets three shielding layers from the outside to the inside, and places the ground wire 5, the first core wire 6 and the third core wire 7 in different shielding layers, so that the shielding of cables with different functions or transmitting different types of signals can be isolated, and the signal types (such as optical fiber signals or electrical signals, etc.) can be placed in different shielding layers according to their sensitivity to external electromagnetic interference, thereby ensuring that the cable has excellent anti-interference performance and stability of signal transmission.

[0021] Specifically, the first shielding layer 2 is an annular aluminum-magnesium wire braided layer, and its outer wall is attached to the inner wall of the insulating outer jacket 1; the second shielding layer 3 is an irregular aluminum foil shielding layer, the third shielding layer 4 and several first core wires 6 are closely attached to its inner wall, and the ground wire 5 is closely attached to its outer wall; the third shielding layer 4 is an irregular aluminum foil shielding layer, several second core wires 7 are closely attached to its inner wall, and several second core wires 6 are closely attached to its outer wall.

[0022] The first shielding layer 2 of the utility model has relatively high flexibility, which can help improve the mechanical properties of the cable insulation jacket 1. The second shielding layer 3 and the third shielding layer 4 are tightly wrapped around the outer surface of the internal core wire, and can fix each core wire without fillers and reduce the core wire wear caused by relative movement or friction between the core wires during the moving cable. In application, a positioning bracket can also be installed in the shielding layer according to actual needs to further isolate different core wires.

[0023] In this embodiment, the insulating outer sheath 1 is a flexible PVC outer sheath; each of the first core wire 6 and the second core wire 7 includes an insulating sheath 8 and a copper stranded wire from the outside, and each copper stranded wire is twisted by two or more copper core wires 9; each copper core wire 9 is a tinned copper core wire.

[0024] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An anti-interference signal line, characterized in that: An insulating outer sheath, a first shielding layer, a second shielding layer and a third shielding layer are provided from the outside to the inside, a ground wire is provided between the first shielding layer and the second shielding layer, two or more first core wires are provided between the second shielding layer and the third shielding layer, and three or more second core wires are provided in the third shielding layer.

2. The anti-interference signal line according to claim 1, characterized in that: The first shielding layer is an annular aluminum-magnesium wire braided layer, and its outer wall is attached to the inner wall of the insulating outer jacket.

3. The anti-interference signal line according to claim 1, characterized in that: The second shielding layer is an irregular aluminum foil shielding layer, the third shielding layer and a plurality of the first core wires are closely attached to the inner wall thereof, and the ground wire is closely attached to the outer wall thereof.

4. The anti-interference signal line according to claim 1, characterized in that: The third shielding layer is an irregular aluminum foil shielding layer, a number of the second core wires are closely attached to the inner wall thereof, and a number of the second core wires are closely attached to the outer wall thereof.

5. The anti-interference signal line according to claim 1, characterized in that: The insulating outer sheath is a flexible PVC outer sheath.

6. An anti-interference signal line according to any one of claims 1 to 5, characterized in that: Each of the first core wire and the second core wire comprises an insulating sheath and a copper stranded wire from the outside, and each of the copper stranded wires is formed by twisting two or more copper core wires.

7. The anti-interference signal line according to claim 6, characterized in that: Each of the copper core wires is a tinned copper core wire.

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