Cable and cable assembly

Abstract

A cable and a cable assembly are provided. The cable comprises at least two insulating core wires (110), wherein each insulating core wire comprises a conductive wire core (111) and a first insulating layer (112) coating the conductive wire core; an insulating structure (120), which is wrapped on the at least two insulating core wires at the outer side so as to fixedly position the at least two insulating core wires; a first shield layer (130); a second shielding layer (140); and a second insulating layer (150) circumferentially wrapping both the first shielding layer and the second shielding layer on an outer side, each of the first shielding layer and the second shielding layer circumferentially surrounding a portion of an outer circumferential surface of the insulating structure, and the first shielding layer and the second shielding layer together form a combined shielding layer which circumferentially wraps the whole peripheral surface of the insulating structure.

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to cables, and more particularly, to cables capable of at least improving SI performance to increase data transmission rates and cable assemblies including such cables. Background Art

[0002] The structure of a conventional data transmission cable mainly includes a conductor, an internal insulating tape wrapped around the conductor, an internal conductive shielding tape wrapping the internal insulating tape, a ground wire, an external conductive shielding tape wrapping the internal conductive shielding tape and the ground wire, and an external insulating tape including the external conductive shielding tape. However, the high-frequency test bandwidth that can be achieved by this conventional structure is low, which cannot meet the requirements of higher-frequency data transmission, and the high-frequency performance is unstable.

[0003] Moreover, in this conventional cable structure, two overlapping layers of conductive shielding tapes are used to provide shielding, but there are strict requirements for their overlapping positions, which require extremely high process requirements and a high defect rate; moreover, this conventional cable structure requires two layers of metal tapes, and the overlapping positions of the two conductive shielding tapes fluctuate or deviate due to the manufacturing process, affecting the quality of removing the metal tapes during assembly, easily generating metal burrs, and affecting SI performance; in addition, only the winding process can be used to wrap the outermost external insulating tape, and the internal ground wire will be taken away from the central position during winding, making the cable structure unstable and resulting in poor SI performance stability; and, there is a winding pitch for the wound external insulating tape, resulting in the inability to increase the bandwidth of this conventional cable structure, and the maximum transmission rate can only reach 224 Gbps. Summary of the Utility Model

[0004] In order to overcome at least one of the above and other problems and defects existing in the prior art, the present disclosure is proposed.

[0005] According to an embodiment of one aspect of the present disclosure, there is provided a cable, including: at least two insulated core wires, each insulated core wire including a conductive core wire and a first insulating layer coated on the conductive core wire;

[0006] An insulating structure that is wrapped around the at least two insulated core wires on the outside to fixedly position the at least two insulated core wires; a first shielding layer; a second shielding layer; and a second insulating layer that circumferentially wraps both the first shielding layer and the second shielding layer on the outside, each of the first shielding layer and the second shielding layer circumferentially surrounds a part of the outer peripheral surface of the insulating structure, such that the first shielding layer and the second shielding layer together form a combined shielding layer that circumferentially wraps the entire outer peripheral surface of the insulating structure.

[0007] In some embodiments, each of the first shielding layer and the second shielding layer is a semi-longitudinal wrapping layer that extends continuously along the entire length of the cable.

[0008] In some embodiments, the first shielding layer and the second shielding layer are arranged radially opposite to each other, and each shielding layer circumferentially surrounds at least half of the outer peripheral surface of the insulating structure.

[0009] In some embodiments, each of the first shielding layer and the second shielding layer has a substantially C-shaped or U-shaped cross-section.

[0010] In some embodiments, the first shielding layer and the second shielding layer at least partially overlap in the circumferential direction of the insulating structure to form an annular combined shielding layer.

[0011] In some embodiments, the first shielding layer and the second shielding layer overlap at two radially opposite positions on the outer peripheral surface of the insulating structure.

[0012] In some embodiments, the outer peripheral surface of the insulating structure has a first flat portion and a second flat portion respectively located at the two positions. The first shielding layer has a first end section and a second end section opposite to each other in the circumferential direction. The second shielding layer has a third end section and a fourth end section opposite to each other in the circumferential direction. The first end section and the third end section are attached to the first flat portion at least partially overlapping each other. The second end section and the fourth end section are attached to the second flat portion at least partially overlapping each other.

[0013] In some embodiments, the first end section and the third end section are joined to each other, and the second end section and the fourth end section are joined to each other.

[0014] In some embodiments, the circumferential positions of the first end section and the third end section overlapping each other relative to the central axis of the cable, and the circumferential positions of the second end section and the fourth end section overlapping each other relative to the central axis of the cable are fixed along the entire length of the cable.

[0015] In some embodiments, the second insulating layer includes one or more layers of tubular full-longitudinal wrapping layers or outer insulating sheaths that circumferentially wrap both the first shielding layer and the second shielding layer and extend continuously along the entire length of the cable; or the second insulating layer includes one or more layers of insulating tapes.

[0016] In some embodiments, the cable further includes at least one ground wire (160) that is in electrical contact with at least one of the first shielding layer and the second shielding layer, and the at least one ground wire is located between the at least one shielding layer and the insulating structure, or between the at least one shielding layer and the second insulating layer.

[0017] In some embodiments, the at least one ground wire includes only a single ground wire, and the single ground wire is located between one of the first shielding layer and the second shielding layer and the insulating structure, or between one of the first shielding layer and the second shielding layer and the second insulating layer; or, the at least one ground wire includes two ground wires symmetrically arranged on opposite sides of the insulating structure, and each ground wire is located between a corresponding one of the first shielding layer and the second shielding layer and the insulating structure, or between a corresponding one of the first shielding layer and the second shielding layer and the second insulating layer.

[0018] In some embodiments, the cable further includes an outer shielding layer, and the outer shielding layer is disposed inside the second insulating layer to circumferentially wrap the first shielding layer, the second shielding layer, and each ground wire.

[0019] In some embodiments, each ground wire is adhered to the circumferential center position of the corresponding shielding layer via an adhesive layer on the inner side surface of the corresponding shielding layer.

[0020] In some embodiments, at least one of the first shielding layer and the second shielding layer is adapted to be electrically connected to an external ground.

[0021] In some embodiments, at least one of the first insulating layer and the insulating structure includes a foamed insulating structure.

[0022] In some embodiments, the insulating structure includes a wrapped insulating tape.

[0023] In some embodiments, the insulating structure includes an intermediate insulating sheath.

[0024] In some embodiments, the intermediate insulating sheath includes a single extruded structure that wraps and contacts the outer peripheral surface of the first insulating layer of each insulated core wire.

[0025] According to an embodiment of another aspect of the present disclosure, there is provided a cable assembly, including: at least two cables, each cable being a cable described in any embodiment of the present disclosure; a shielding ring that circumferentially surrounds the at least two cables; and a protective sleeve that is sleeved outside the shielding ring. Description of the Drawings

[0026] The above and other aspects, features, and advantages of various embodiments of the present disclosure will become clearer from the following detailed description in conjunction with the accompanying drawings, in which:

[0027] Figure 1 is a cross-sectional view schematically showing the structure of a cable according to an exemplary embodiment of the present disclosure;

[0028] Figure 2 is a cross-sectional view schematically showing the structure of a cable according to another exemplary embodiment of the present disclosure;

[0029] Figure 3 is a cross-sectional view schematically showing the structure of a cable according to yet another exemplary embodiment of the present disclosure;

[0030] Figure 4 is a cross-sectional view schematically showing the structure of a cable according to yet another exemplary embodiment of the present disclosure;

[0031] Figure 5 is a cross-sectional view schematically showing the structure of a cable according to an exemplary embodiment of the present disclosure;

[0032] Figure 6 is a cross-sectional view schematically showing the structure of a cable according to another exemplary embodiment of the present disclosure;

[0033] Figure 7 is a cross-sectional view schematically showing the structure of a cable according to yet another exemplary embodiment of the present disclosure;

[0034] Figure 8 is a cross-sectional view schematically showing the structure of a cable according to yet another exemplary embodiment of the present disclosure;

[0035] Figure 9 is a cross-sectional view schematically showing the structure of a cable according to an exemplary embodiment of the present disclosure;

[0036] Figure 10 is a cross-sectional view schematically showing the structure of a cable according to another exemplary embodiment of the present disclosure; and

[0037] Figure 11 is a cross-sectional view schematically showing the structure of a cable assembly according to an exemplary embodiment of the present disclosure. Detailed Description of the Embodiments

[0038] The embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. In this specification, the same or similar components are denoted by the same or similar reference numerals. The following description of the various embodiments of the present disclosure with reference to the drawings is intended to explain the general concept of the present disclosure and should not be construed as a limitation of the present disclosure.

[0039] In addition, in the following detailed description, for the sake of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. However, it is obvious that one or more embodiments may be implemented without these specific details. In other instances, well-known structures and devices are illustrated in a schematic manner to simplify the drawings.

[0040] In addition, the terms used herein are intended to describe exemplary embodiments and are not intended to limit and / or restrict the present disclosure. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are also intended to include the plural forms. In the present disclosure, the terms "comprising", "including", "having", and similar terms are used to enumerate features, quantities, steps, operations, elements, components, or combinations thereof, but do not preclude the presence or addition of one or more of the recited features, quantities, steps, operations, elements, components, or combinations thereof.

[0041] Although the terms "first", "second", etc. may be used herein to describe various different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of the present disclosure, the first element may be referred to as the second element, and the second element may be referred to as the first element. The term "and / or" includes multiple combinations of related items or any one of the multiple related items.

[0042] Embodiments of the present disclosure provide a cable, such as a high-speed cable, for example, its transmission rate can be as high as 224 Gbps, or even 448 Gbps. In the Figures 1-11 exemplary embodiment shown, the cable includes at least two insulated core wires 110 for transmitting electrical power or data signals. Each insulated core wire 110 extends longitudinally and includes a conductive core 111 and a first insulating layer 112. The first insulating layer 112 circumferentially covers and contacts the entire conductive core 111 on the outside to electrically insulate the conductive core 111. In this document, the conductive core refers to the conductive core body made of conductive material and not including insulating material, for example, consisting only of a conductor. As an example, each conductive core may be made of a high-conductivity material such as a copper conductor or a silver-plated conductor. Each conductive core may be a single-wire core formed by a single conductor, or a stranded wire core formed by two or more conductors, and is not particularly limited herein.

[0043] In the embodiments of the present disclosure, with reference to Figures 1-11, the cable further includes an insulating structure 120 that extends longitudinally along the insulated core wire 110 and wraps around each insulated core wire 110 on the outside to fixedly position each insulated core wire 110 and can provide electrical insulation and protection functions for the insulated core wire 110. Each insulated core wire 110 positioned within the insulating structure 120 can be held such that the outer circumferential surfaces of the insulated core wires 110 abut against each other to be fixedly positioned relative to each other.

[0044] In the illustrated exemplary embodiment, the insulating structure 120 can have an annular structure or an annular cross-section and partially contact (e.g., bond) the outer circumferential surface of the first insulating layer 112 of each insulated core wire 110. As an example, a hollow portion including a substantially elliptical cross-section can be defined within the insulating structure 120, and each insulated core wire 110 is positioned within the hollow portion defined by the insulating structure 120. For example, two insulated core wires 110 are symmetrically held within the hollow portion, and the two insulated core wires 110 can be spaced apart along the major axis direction of the elliptical shape. For example, the centers of the two insulated core wires 110 can respectively coincide with the two foci of the elliptical shape. In this case, as Figures 1-4 shown, there can be a certain space or gap between a part of the insulating structure 120 and the insulated core wire 110, such that the cable can be flexible or have a certain flexibility, so that the cable can be easily bent during assembly or use of the cable, facilitating operation. However, the present disclosure is not limited thereto, and the cross-sectional shape of the insulating structure, the arrangement of the insulated core wires, etc. can be changed according to actual needs. For example, in other embodiments not shown, the space within the space or between the insulated core wires can be at least partially filled with the material of the insulating structure or other fillers, or the insulating structure is formed such that there is substantially no gap between each insulated core wire and the insulating structure.

[0045] According to an exemplary embodiment of the present disclosure, as Figures 1-11 shown in the cross-sectional view, the cable further includes a first shielding layer 130, a second shielding layer 140, and a second insulating layer 150 that circumferentially wraps around both the first shielding layer 130 and the second shielding layer 140 on the outside. Different from the conventional technology, the first shielding layer 130 and the second shielding layer 140 respectively circumferentially surround a part of the outer circumferential surface of the insulating structure 120. Thus, the first shielding layer 130 and the second shielding layer 140 together form a combined shielding layer that circumferentially wraps around the entire outer circumferential surface of the insulating structure 120, which can be grounded directly or via a ground wire or a drainage wire described below to provide a shielding effect for the cable, such as suppressing electromagnetic interference, protecting the signal from the influence of external interference, reducing signal leakage, providing ground protection, and can also improve the durability of the cable, such as preventing the cable from being physically damaged, such as extrusion, stretching, or bending, thereby extending the service life of the cable.

[0046] In a conventional cable, when the shielding layer surrounds the inner insulating layer in the circumferential direction in the form of a complete ring, it usually cannot fit well on the inner insulating layer; in addition, when using an insulating tape to wind or wrap the inner insulating layer around the cable lengthwise turn by turn, such winding or wrapping is time-consuming, inefficient, and there is a winding or wrapping pitch, resulting in return loss. Therefore, the high-frequency test bandwidth of a conventional cable with such a structure cannot meet the requirements of higher-rate data transmission, and the stability of the SI performance of the cable is poor.

[0047] In the embodiments of the present disclosure, different from the winding or wrapping structure, each of the first shielding layer 130 and the second shielding layer 140 is a semi-longitudinal wrapping layer, which continuously extends along the entire length of the cable. The shielding layer in the form of a semi-longitudinal wrapping layer can be formed into a substantially semi-tubular structure that circumferentially wraps (e.g., fits or contacts) on the insulating structure 120 and extends along the length or longitudinal direction of the cable. In this way, it can better fit (such as by heat fusion or by adhesive bonding) on the insulating structure 120, thereby improving the stability of the SI performance of the cable, and can eliminate the pitch of the conventional wrapping structure, further eliminating the return loss caused by the wrapping structure as a whole, and improving the cable frequency bandwidth. For example, the cable frequency bandwidth can be more easily increased from 60 GHz to 112 GHz or even higher, so as to meet the requirements of high-speed data transmission such as 448 Gbps. The first shielding layer 130 and the second shielding layer 140 can include a metal shielding layer or tape, for example, can include an insulating tape layer or tape, and a conductive layer (such as a metal layer) attached to the insulating tape layer or tape.

[0048] A die can be used for the fitting operation of the shielding layer in the semi-longitudinal wrapping form. For example, the tape material of the shielding layer is supplied in the die, and while the semi-finished product of the cable (such as an insulating core wire already coated with an insulating structure) travels longitudinally, the die is used to fit (such as by heat fusion or by adhesive bonding) the tape material of the shielding layer on the inner layer structure (such as the insulating structure). Removing the wrapping structure can also eliminate the limitation of the wrapping speed of the tape wrapping machine on the production efficiency and reduce the cost.

[0049] In an exemplary embodiment, the first shielding layer 130 and the second shielding layer 140 can be arranged radially opposite (such as opposite in the X direction in the figure; in this article, the radial direction parallel to the X direction can be called the first radial direction), and each shielding layer extends longitudinally and circumferentially around at least half of the outer peripheral surface of the insulating structure 120, for example, in the form of substantially semi-rings facing each other, so that the combination of the two circumferentially surrounds the entire circumference of the insulating structure 120. As an example, the cross-sectional shapes of the first shielding layer 130 and the second shielding layer 140 basically correspond to or match the cross-sectional shape of the outer peripheral surface of the inner insulating structure 120, and can respectively have a substantially C-shaped or U-shaped cross-section.

[0050] In an embodiment as shown in Figures 1-11 , the first shielding layer 130 and the second shielding layer 140 at least partially overlap in the circumferential direction of the insulating structure 120 to form a substantially annular combined shielding layer. For example, as shown in Figures 1-11 , the first shielding layer 130 and the second shielding layer 140 may overlap at different positions or sections on the outer peripheral surface of the insulating structure 120, such as at two positions or sections that are radially opposite on the outer peripheral surface of the insulating structure 120 (opposite in the Y direction in the figure; herein, the radial direction parallel to the Y direction may be referred to as the second radial direction).

[0051] In the illustrated embodiment, at or near two central positions or sections on the outer peripheral surface of the insulating structure 120 in the X direction or the first radial direction (such as the upper and lower central positions or sections in the figure, whose centers may be substantially aligned with the cross-sectional center O of the cable in the Y direction or the second radial direction), the first shielding layer 130 and the second shielding layer 140 overlap each other. However, the present disclosure is not limited thereto. In other embodiments not shown, the overlapping positions of the first shielding layer and the second shielding layer with each other may vary according to actual applications. For example, the first shielding layer and the second shielding layer may be at or near two central positions or sections on the outer peripheral surface of the insulating structure in the Y direction or the second radial direction (such as the left and right central positions or sections in the figure, whose centers may be substantially aligned with the cross-sectional center O of the cable in the X direction or the first radial direction), or may deviate from the above two central positions or sections.

[0052] When the overlapping positions of the first shielding layer and the second shielding layer with each other are at or near the above central positions or sections on the outer peripheral surface of the insulating structure, since the electric / magnetic fields generated by two or more internal insulating core wires during operation are relatively small at the above central positions or sections (for example, cancel each other out in some cases), the influence of the first shielding layer and the second shielding layer on the electric / magnetic fields and the interference with signal transmission can be reduced.

[0053] In some exemplary embodiments, referring to Figures 1-11As shown in the cross-sectional view, the outer peripheral surface of the insulating structure 120 may have a first flat portion 121 and a second flat portion 122 at or near two positions or sections that are opposite in the radial direction (such as in the Y direction), for example, at two central positions or sections in the X direction or the first radial direction. The first shielding layer 130 has a first end section 131 and a second end section 132 that are opposite in the circumferential direction, and the second shielding layer 140 has a third end section 141 and a fourth end section 142 that are opposite in the circumferential direction. The first end section 131 and the third end section 141 are attached to the first flat portion 121 at least partially overlapping each other, while the second end section 131 and the fourth end section 142 are attached to the second flat portion 122 at least partially overlapping each other. At least one of the first end section 131, the second end section 132, the third end section 141, and the fourth end section 142 may be a straight section to facilitate attachment on the flat portion of the insulating structure 120, such as extrusion and bonding. The first end section 131 and the third end section 141 may be joined to each other, and the second end section 131 and the fourth end section 142 may be joined to each other. Such joining may be, for example, adhesion achieved by a heat fusion method or via an adhesive or a viscous layer provided on the inner side surface of the shielding layer or additionally added.

[0054] In some examples, the first flat portion 121 and the second flat portion 122 of the insulating structure 120 may extend substantially parallel to a tangent line that is tangent to the outer peripheral surfaces of two or more internal insulating wire cores 110, and this tangent line may be substantially parallel to the X direction or the first radial direction or substantially parallel to the connection line of the centers of the internal insulating wire cores 110. The arrangement of the flat portions of the insulating structure not only facilitates the attachment operation of the overlapping portions of the first shielding layer and the second shielding layer on this flat portion, but also makes the outer contour or shape of the cable at this flat portion be substantially flat or straight, facilitating the arrangement and stable positioning of the cable during use.

[0055] In addition, in the illustrated cross-sectional view, the overlapping portion of the first shielding layer and the second shielding layer may be symmetric with respect to the center line of the cable that is parallel to the X direction or the Y direction, such that the influence of the first shielding layer and the second shielding layer on the electric / magnetic field and signal transmission generated by the two internal insulating cores during operation is the same or mutually balanced. For example, as Figures 1-4 shown, the overlapping first end section 131 and the third end section 141 are symmetric with respect to the center line of the cable that is parallel to the Y direction, and the overlapping third end section 141 and the fourth end section 142 are symmetric with respect to the center line of the cable that is parallel to the Y direction.

[0056] In an exemplary embodiment of the present disclosure, a mold may be used to attach the first shielding layer 130 and the second shielding layer 140 in a semi-longitudinal wrapping manner on the insulating structure 120, so that the circumferential positions of the overlapping first end section 131 and the third end section 141 relative to the central axis of the cable, and the circumferential positions of the overlapping second end section 132 and the fourth end section 142 relative to the central axis of the cable are fixed along the entire length of the cable. That is, the overlapping positions of the first shielding layer 130 and the second shielding layer 140 are longitudinally aligned along the entire length of the cable, which can effectively reduce burrs caused by unfixed overlapping positions during laser debonding of the shielding layer and improve the stability of SI performance.

[0057] In some exemplary embodiments according to the present disclosure, the second insulating layer 150, as the outer insulating layer, may include a full longitudinal wrapping layer that continuously extends into a tubular shape along the entire length of the cable and circumferentially wraps both the first shielding layer 130 and the second shielding layer 140. Therefore, instead of the wrapping arrangement of the outer insulating layer in conventional cables, the exemplary embodiments of the present disclosure propose an outer insulating layer in the form of a full longitudinal wrap. The longitudinal wrapping form eliminates the conventional wrapping structure, enabling the second insulating layer to better fit the internal structure and overall eliminating the return loss caused by the wrapping structure, making it easier to increase the cable frequency bandwidth to 112 GHz or even higher, thus meeting data transmission requirements at rates such as 224 Gbps, 448 Gbps, or higher. Similarly, a mold may be used for the attachment operation of the second insulating layer in the form of a full longitudinal wrap.

[0058] As an example, the second insulating layer may include a single-layer full longitudinal wrapping layer or insulating tape, or include two or more layers of full longitudinal wrapping layers or insulating tapes that are stacked or concentrically arranged with each other. For example, as Figure 6 and 8 shown, the second insulating layer may include two sub-insulating layers 151, 152, which may be annular and concentrically cover the outside of the first shielding layer 130 and the second shielding layer 140. In the case of using a single-layer full longitudinal wrapping layer or insulating tape, the adhesive side of the second insulating layer may face inward to bond and fixedly position the internal cable structure, such as the shielding layer and / or ground wire. In the case of using two or more layers of full longitudinal wrapping layers or insulating tapes, the adhesive sides of adjacent layers of full longitudinal wrapping layers or insulating tapes may face each other and bond to each other. In other embodiments, the second insulating layer may be in the form of an outer sheath, such as a protective sleeve.

[0059] In embodiments of the present disclosure, the first insulating layer 112, the insulating structure 120, and the second insulating layer 150 may be made of insulating materials such as polyester, polyethylene, polypropylene, tetrafluoroethylene, polyvinyl chloride, polytetrafluoroethylene, perfluoroethylene propylene copolymer, polyvinylidene fluoride, ethylene copolymer, polyolefin, polyethylene terephthalate (“PET”), etc. In addition, the materials of the first insulating layer 112 and the insulating structure 120 may be selected such that the electrical and / or mechanical properties of the insulating structure 120 are different from those of the first insulating layer 112. For example, in some embodiments, the first insulating layer 112 or the insulating structure 120 may include a foamed or porous insulating material (e.g., as Figures 1-3 schematically shown) to reduce or easily adjust the dielectric constant of the cable. For example, the insulating structure 120 may be formed by wrapping (e.g., winding) a foamed or porous insulating tape around the outer circumference of the first insulating layer 112. However, the present disclosure is not limited thereto. For example, as Figure 4 shown, the insulating structure 120 may be merely a wound insulating tape.

[0060] In other embodiments, the insulating structure 120 may be in the form of an insulating sheath, which may be referred to as an intermediate sheath or a middle sheath insulation, and is sleeved on the outer circumferential surface of the first insulating layer 112 of each insulated core wire 111 to fix the relative positions of the insulated core wires 111. In some examples, the insulating structure 120 may include a single extruded structure that circumferentially wraps and contacts the outer circumferential surface of the first insulating layer 112 of each insulated core wire 110. For example, there is substantially no gap between the insulating structure 120 and the outer circumferential surface of the first insulating layer 112, as Figures 5-10 shown. As an example, the insulating structure 120 may be formed by an extrusion process. For example, each insulated core wire 110 and the insulating material for forming the insulating structure 120 may be tightly extruded together in a mold (not shown), such as being in close contact with each other, and then extruded from the mold. Thus, there is substantially no gap between the extruded insulating structure 120 and the outer circumferential surface of the first insulating layer 112, and the insulating structure 120 can firmly hold the positions of the inner insulated core wires 111. Therefore, the internal insulation of the cable is divided into insulated core wire insulation and middle sheath insulation, which is softer and more resistant to bending than a conventional double-extrusion one-step formed cable. In addition, the insulating structure 120 may also be formed by an extrusion process using a foamed or porous insulating material to improve the electrical performance of the cable.

[0061] In some embodiments, as Figure 1 , 2As shown in FIGS. 3 and 4, the cable 100 may further include a separately provided ground wire or drainage wire, such as at least one ground wire 160 that is in electrical contact with at least one of the first shielding layer 130 and the second shielding layer 140, to enhance the electromagnetic shielding effect of the cable. At least one ground wire 160 may be disposed between the first shielding layer 130 and / or the second shielding layer 140 and the insulating structure 120, such as Figure 1 and Figure 2 shown. In some other embodiments, at least one ground wire 160 may be disposed outside the first shielding layer 130 and / or the second shielding layer 140, such as between the first shielding layer 130 and / or the second shielding layer 140 and the second insulating layer 150. In Figure 1 and Figures 4-7 the illustrated embodiment, two ground wires 160 are provided, which are, for example, disposed on two radially opposite outer sides of the insulating structure 120. While in Figure 2 only a single ground wire 160 is provided on one side of the cable. While in Figure 3 and Figures 8-10 no separate ground wire or drainage wire is provided in the cable, and the first shielding layer 130 and / or the second shielding layer 140 may be adapted to be electrically connected to an external ground to serve as a ground wire function.

[0062] Exemplarily, as Figure 1 and Figure 2 shown, the ground wire 160 may be positioned (e.g., adhered via an adhesive) inside the first shielding layer 130 and / or the second shielding layer 140. At this time, the metal layer or conductive layer of the first shielding layer 130 and / or the second shielding layer 140 faces inward to be in electrical contact with the ground wire 160, which can enhance the overall EMC and EMI capabilities of the cable and further improve the stability of the electrical performance of the cable. For example, each ground wire 160 may be positioned at the circumferential center position of the first shielding layer 130 and / or the second shielding layer 140. For example, the centers of the ground wire 160 and the conductive wire core 111 may be located in the same radial plane. Alternatively, as Figures 4-7 shown, the ground wire 160 may be disposed outside the first shielding layer 130 and / or the second shielding layer 140, such as between the first shielding layer 130 and / or the second shielding layer 140 and the second insulating layer 150. At this time, the metal layer or conductive layer of the first shielding layer 130 and / or the second shielding layer 140 faces outward to be in electrical contact with the ground wire 160. As Figure 7 and Figure 9 shown, the cable may further include an outer shielding layer 170. The outer shielding layer 170 is disposed inside the second insulating layer 150 to circumferentially wrap and electrically contact the first shielding layer 130, the second shielding layer 140, and each ground wire 160 on the outside, thereby further providing an enhanced electromagnetic shielding effect for the ground wire and / or the entire cable.

[0063] According to an embodiment of the present disclosure, since the wrapping structure is removed and a semi-longitudinal wrapping structure is adopted for the first shielding layer and the second shielding layer, a die can be used to fix the position of the ground wire of the cable at the center line. For example, the ground wire can be adhered to the inner surface of the shielding layer through an adhesive layer such as an adhesive layer, an adhesive, or a hot melt adhesive provided on the inner surface of the corresponding shielding layer. The shielding layer in the semi-longitudinal wrapping form can better fit and wrap the ground wire, so that at least a part of the circumference of each ground wire can be wrapped by the corresponding shielding layer and thus be stably fixed, thereby avoiding the displacement of the ground wire caused by the wrapping force of the conventional wrapping tape. The ground wire extends or is fixed linearly basically along the length or longitudinal direction of the cable, that is, the displacement of the ground wire within the longitudinal or length range of the cable is reduced or eliminated.

[0064] Embodiments of the present disclosure also provide a cable assembly 10, as Figure 4 shown, which includes at least two cables described herein, and these cables can be arranged within a protective sleeve 11. For example, these cables can be parallel, stranded, or wound together with each other in the longitudinal direction. The cable assembly can include two or more cables, so as to provide more signal, data, or power transmission functions, and there is no signal interference between the respective cables.

[0065] The protective sleeve 11 can be in the form of a sleeve, such as a metal tube or a plastic tube, to provide a certain protection function. As shown in the figure, the cable assembly can also include a shielding ring 12 serving as an electromagnetic shielding structure disposed within the protective sleeve 11, which can be in the form of a layer / tape of metal or other conductive material, wrapped or wound around the outside of all the cables to provide a further improved electromagnetic shielding effect.

[0066] In some examples, as Figure 4 shown, the cable assembly can also include an additional buffer layer 13, such as a braided layer, which is disposed within the protective sleeve 11, for example, arranged in a ring form between the shielding ring 12 and the protective sleeve 11 to provide buffering or shock absorption to the cables. In some other examples, the space between the cables within the protective sleeve and / or the space between the cables and the buffer layer or the shielding structure can also be at least partially filled with a filler 14, so that the structure of the cable assembly is not easily deformed and remains stable during use.

[0067] Although the embodiments of the present disclosure have been shown and described, it will be understood by those of ordinary skill in the art that various changes can be made thereto without departing from the principles and spirit of the present disclosure, and the protection scope of the present disclosure is defined by the appended claims and their equivalents. In addition, it should be noted that unless otherwise specified, the terms "comprising", "including", and "having" used herein do not exclude other elements or steps. Additionally, any element numbers in the claims should not be construed as limiting the protection scope of the present disclosure.

Claims

1. A cable, characterized in that: The cable comprises: At least two insulating core wires (110), each insulating core wire comprising a conductive core (111) and a first insulating layer (112) coated on the conductive core; An insulating structure (120), the insulating structure being wrapped around the at least two insulating core wires on the outside to fixedly position the at least two insulating core wires; A first shielding layer (130); a second shielding layer (140); and a second insulating layer (150) which circumferentially wraps around both the first shielding layer and the second shielding layer on the outside, Each of the first shielding layer and the second shielding layer circumferentially surrounds a portion of the outer circumference of the insulation structure, so that the first shielding layer and the second shielding layer together form a combined shielding layer circumferentially wrapped around the entire outer circumference of the insulation structure.

2. The cable according to claim 1, characterized in that: Each of the first shielding layer and the second shielding layer is a half longitudinal sheath extending continuously along the entire length of the cable.

3. The cable according to claim 2, characterized in that: The first shielding layer and the second shielding layer are arranged radially opposite to each other, and each shielding layer circumferentially surrounds at least half of the outer circumference of the insulation structure.

4. The cable according to claim 3, characterized in that: Each of the first shielding layer and the second shielding layer has a substantially C-shaped or U-shaped cross-section.

5. The cable according to claim 3, characterized in that: The first shielding layer and the second shielding layer at least partially overlap in a circumferential direction of the insulation structure to form an annular combined shielding layer.

6. The cable according to claim 5, characterized in that: The first shielding layer and the second shielding layer overlap at two radially opposite locations on the outer circumferential surface of the insulation structure.

7. The cable according to claim 6, characterized in that: The outer peripheral surface of the insulating structure has a first flat portion (121) and a second flat portion (122) located at the two positions respectively. The first shielding layer has a first end section (131) and a second end section (132) which are opposite to each other in the circumferential direction. The second shielding layer has a third end section (141) and a fourth end section (142) which are opposite to each other in the circumferential direction. The first end section and the third end section are attached to the first flat portion in a manner that they at least partially overlap each other. The second end section and the fourth end section are attached to the second flat portion in a manner that they at least partially overlap each other.

8. The cable according to claim 7, characterized in that: The first end section and the third end section are joined to each other, and The second end section and the fourth end section are joined to each other.

9. The cable according to claim 8, characterized in that: The circumferential positions of the first and third end segments overlapping each other relative to the central axis of the cable, and the circumferential positions of the second and fourth end segments overlapping each other relative to the central axis of the cable are fixed along the entire length of the cable.

10. The cable according to any one of claims 1 to 9, characterized in that: The second insulating layer comprises one or more layers of a tubular full longitudinal sheath or outer insulating jacket circumferentially surrounding both the first shielding layer and the second shielding layer and extending continuously along the entire length of the cable; or The second insulating layer includes one or more layers of insulating tape.

11. The cable according to any one of claims 1 to 9, characterized in that: The cable also includes at least one ground wire (160) electrically contacting at least one of the first shielding layer and the second shielding layer, and the at least one ground wire is located between the at least one shielding layer and the insulating structure, or between the at least one shielding layer and the second insulating layer.

12. The cable according to claim 11, characterized in that: The at least one ground wire comprises only a single ground wire, and the single ground wire is located between one of the first shielding layer and the second shielding layer and the insulating structure, or between one of the first shielding layer and the second shielding layer and the second insulating layer; or The at least one ground wire includes two ground wires symmetrically arranged on opposite sides of the insulating structure, and each ground wire is located between a corresponding one of the first shielding layer and the second shielding layer and the insulating structure, or between a corresponding one of the first shielding layer and the second shielding layer and the second insulating layer.

13. The cable according to claim 12, characterized in that: The cable further includes an outer shielding layer (170) disposed inside the second insulating layer to circumferentially wrap the first shielding layer, the second shielding layer and each ground wire.

14. The cable according to claim 12 or 13, characterized in that: Each ground wire is bonded to the corresponding shielding layer at the circumferential center position via the adhesive layer on the inner side of the corresponding shielding layer.

15. The cable according to any one of claims 1 to 9, characterized in that: At least one of the first shielding layer and the second shielding layer is adapted to be electrically connected to an external ground.

16. The cable according to any one of claims 1 to 9, 12 and 13, characterized in that: At least one of the first insulating layer and the insulating structure includes a foamed insulating structure.

17. The cable according to any one of claims 1 to 9, 12 and 13, characterized in that: The insulating structure includes a wrapped insulating tape.

18. The cable according to any one of claims 1 to 9, 12 and 13, characterized in that: The insulating structure includes an intermediate insulating sheath.

19. The cable according to claim 18, characterized in that The intermediate insulating sheath includes a single extruded structure that wraps around and contacts the outer circumference of the first insulating layer of each insulated core wire.

20. A cable assembly, characterized in that: The cable assembly comprises: at least two cables, each cable being a cable as claimed in any one of claims 1 to 19; a shielding ring (11) circumferentially surrounding the at least two cables; and A protective sleeve (12) is sleeved on the outside of the shielding ring.

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