CN115171959A - Wire and data transmission cable with same - Google Patents

Abstract

The invention provides a conducting wire and a data transmission cable with the conducting wire. The lead is provided with a central conductor, and the outer surface of the central conductor is provided with an insulation covering area and a hollow area which are distributed along the circumferential direction. The wire still including set up in the insulating layer in the central conductor outside, the insulating layer including correspond set up in the insulating part in the insulating coverage area outside with set up in the fretwork portion in the fretwork district outside of central conductor, the fretwork district exposes in the fretwork portion.

Description

Wire and data transmission cable with same

Technical Field

The present invention relates to a data transmission cable, and more particularly, to a wire with stable signal transmission performance and a data transmission cable having the same.

Background

In the 3C industry, transmission cables are used as a medium for electrical connection between two electronic devices, and can stably perform desired signal transmission operations. Thus, transmission cables are commonly used in various electronic devices. Among them, the transmission cable connected to interfaces such as USB, HDMI, DVI, displayport, SAS has high transmission rate, long distance, high quality, and is popular with the public, and the number of applications is increasing. The transmission cables have a plurality of metal wires therein, and the plurality of metal wires generally have a central conductor and an insulating coating layer surrounding the central conductor. Even though the dielectric constant of the insulating coating made of a part of the material is low, the influence on the high-frequency data transmission is small, however, under the high-speed development of the electronic industry, the influence needs to be reduced or eliminated.

Therefore, there is a need for improvement of the prior art to overcome the above technical problems.

Disclosure of Invention

The invention aims to provide a conducting wire for improving signal transmission performance and a data transmission cable with the conducting wire.

To achieve the above object, the present invention provides a wire having a center conductor, characterized in that: the outer surface of the central conductor is provided with an insulation coverage area and a hollow-out area which are distributed along the circumferential direction, the wire further comprises an insulation layer arranged on the outer side of the central conductor, the insulation layer comprises an insulation portion correspondingly arranged on the outer side of the insulation coverage area and a hollow-out portion correspondingly arranged on the outer side of the hollow-out area of the central conductor, and the hollow-out area is exposed in the hollow-out portion.

Further, the insulating part has adjacently the lateral wall face in fretwork district, the insulating layer is still including setting up the structure that covers in the fretwork outside, cover the structural connection along the circumferencial direction set up relatively in the insulating part lateral wall face of fretwork both sides, cover the structure with insulating part integrated into one piece.

Further, the outer surfaces of the insulating part and the covering structure are located on the same circumferential surface concentric with the central conductor.

Further, the insulation footprints are symmetrically disposed along an axis of the center conductor.

Furthermore, a pair of the insulation covering areas are symmetrically arranged, and the insulation parts are arranged outwards from the center of the central conductor in a fan shape.

In order to achieve the above object, the present invention further provides a data transmission cable, which includes a plurality of wires arranged side by side, and a covering layer covering the outer sides of the plurality of wires, wherein at least some of the wires are arranged as the aforementioned wires.

Furthermore, the insulation parts are arranged on the wires in the direction perpendicular to the arrangement direction of the wires, and the covering layer integrally covers a plurality of plastic covering layers of the wires.

Furthermore, at least part of the conducting wires comprise differential signal wires, and the hollow parts of the adjacent differential signal wires are arranged adjacently along the arranging direction of the conducting wires.

Furthermore, the conducting wire also comprises a grounding conducting wire which is adjacently arranged on at least one side of the differential signal wire, and the outer circumferential surface of the central conductor of the grounding conducting wire is respectively formed into an insulation covering area and correspondingly covered with an insulation material.

Furthermore, the hollow-out part of at least part of the wires is arranged in the wire arrangement direction.

The beneficial effects of the invention are: according to the invention, the insulating layer on the outer side of the lead is redesigned, so that at least part of the outer side of the central conductor is exposed in the hollow part of the insulating layer on the basis of convenient positioning or having an insulating arrangement position, namely the central conductor is exposed in the gas or air interlayer with the lowest dielectric constant, thus the interference possibly generated when the lead is used for data transmission is reduced to the minimum, and the signal transmission performance of the lead is further improved.

Drawings

Fig. 1 is a perspective view of a preferred embodiment of a lead of the present invention.

Fig. 2 is a cross-sectional view of the lead shown in fig. 1.

Fig. 3 is a perspective view of a data transmission cable according to a preferred embodiment of the present invention.

Fig. 4 is a cross-sectional view of the data transmission cable shown in fig. 3.

Fig. 5 is a cross-sectional view of another preferred embodiment of the data transmission cable of the present invention.

Detailed Description

The present invention will be described in detail below with reference to embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.

Referring to fig. 1 and 2, the present invention relates to a wire 1, and the wire 1 can be used in a conventional data transmission cable to perform data transmission in combination, so that as shown in fig. 3 to 5, the present invention also relates to a novel data transmission cable 100.

As shown in fig. 1 and 2, the wire 1 has a central conductor 11 and an insulating layer 12 disposed outside the central conductor 11.

The outer surface of the central conductor 11 has an insulation covering area 111 and a hollow area 112 distributed along the circumferential direction. The insulating layer 12 includes an insulating portion 121 disposed outside the insulating coverage area 111 and a hollow portion 122 disposed outside the hollow area 112 of the central conductor 11, and the hollow area 112 is exposed in the hollow portion 122.

Therefore, the insulation layer 12 outside the lead 1 is redesigned, so that the outside of the central conductor 11 is at least partially exposed in the hollow part 122 of the insulation layer 12 on the basis of convenient positioning or having an insulation arrangement part, which is equivalent to exposing the central conductor 11 in the gas or air with the lowest dielectric constant, thereby minimizing the interference possibly generated when the lead 1 performs data transmission and further improving the signal transmission performance.

In order to facilitate the forming, in this embodiment, except for the connection region where the end of the central conductor 11 is connected to other external elements, the insulation coverage area 111 and the hollow-out area 112 outside the central conductor 11 respectively penetrate through the remaining whole lead 11 along the length direction of the lead 11, so that when the insulating layer 12 is formed, the insulating portion 121 and the hollow-out portion 122 can be continuously formed along the outside of the central conductor 11, and the forming is simple and convenient.

Further, the insulation covering regions 111 are symmetrically arranged along the axis of the central conductor 11, and a pair of insulation parts 121 are symmetrically arranged, and the insulation parts 121 are arranged in a fan shape outward from the central conductor 11, preferably, the side wall surfaces of the insulation parts 121 are arranged to extend in the radial direction of the lead wire 1, that is, the center of the fan-shaped insulation part 121 falls on the axis of the central conductor 11. The insulation covering areas 111 and the hollow-out areas 112 are alternately arranged in sequence, and the areas occupied by the insulation covering areas 111 and the hollow-out areas 112 in the circumferential direction of the central conductor 11 are the same. Through the arrangement, the transmission performance of the lead can be improved, the lead 1 provided by the invention has better insulation and support effects, and the forming is convenient.

The insulating part 121 has the side wall surface adjacent to the hollowed-out area 112, in this embodiment, the insulating layer 12 further includes a covering structure 123 disposed outside the hollowed-out area 122, the covering structure 123 is connected to the side wall surfaces of the insulating part 121 disposed on two sides of the hollowed-out area 122 along the circumferential direction, and is disposed opposite to the hollowed-out area 112 through the hollowed-out area 122 at an interval, so that the hollowed-out area 112 and the hollowed-out area 122 of the central conductor 11 can be protected by the covering structure 123, and a foreign object is prevented from being radially clamped into the hollowed-out area 122 along the wire 11.

As shown in fig. 1 and 2, in the present embodiment, the covering structure 123 is integrally formed with the insulating part 121, so that the overall structure of the lead 1 is stable. Of course, as another preferred embodiment of the present invention, the covering structure 123 may be formed separately from the insulating portion 121, and the covering structure 123 may be separately mounted and fixed on the insulating portion 121, as long as the hollow area 112 can be protected.

Preferably, the outer surfaces of the insulation 121 and the covering structure 123 are located on the same circumferential surface concentric with the center conductor 11, so as to facilitate the alignment and positioning of the lead 1 during use. In addition, in this embodiment, the thickness of the covering structure 123 along the radial direction of the wire 1 is not greater than the dimension occupied by the hollow-out portion 122 along the radial direction of the wire 1.

The lead 1 can be used for signal transmission in various cables. Referring to fig. 3 to 5, a data transmission cable 100 according to a preferred embodiment of the present invention is a flat cable, which includes a plurality of wires arranged side by side, and a covering layer covering the outer sides of the plurality of wires; at least part of the wires are arranged for the wire 1 with the hollow part 122.

Preferably, the outer diameter of the central conductor 11 is 31 to 34 american wire gauge, and the central axes of the conductors 11 of several of the wires in the data transmission cable 100 are located on the same plane.

Further, in the data transmission cable 100, the plurality of conductive wires are each provided with an insulating portion in a direction perpendicular to the arrangement direction of the conductive wires outside the central conductor thereof; that is, in the present embodiment, even though some of the wires 1 are provided with the hollow portions 122, the insulating portions are provided in the direction perpendicular to the arrangement direction of the wires, so that the insulating portions can provide a strong support for the molding of the later-stage covering layer 2, and the covering layer 2 can be molded into a plastic covering layer that integrally covers a plurality of wires, and the hollow portions 122 can be effectively prevented from being filled with the plastic covering material of the covering layer 2 or the covering structure 123 outside the hollow portions 122 is prevented from being deformed by pressure during the molding process of the plastic covering layer.

As shown in fig. 3 and 4, as a preferred embodiment of the present invention, all the wires in the data transmission cable 100 are arranged in the wire 1 structure as shown in fig. 1, that is, the insulating portions 121 of all the wires 1 are arranged along the direction perpendicular to the arrangement direction of the wires 1, and the hollow portions 122 are arranged along the arrangement direction of the wires 1 and isolated from the outside by the covering structure 123; the covering layer 2 is usually formed by a plastic material, and during the forming process, the wires 1 are mainly pressed in a direction perpendicular to the arrangement direction of the wires, so that the insulation portion 121 provides a better supporting effect, and two sides of the covering structure 123 only need to be isolated and positioned.

Of course, when the covering structure 123 is disposed outside the hollow portion 122 and the covering structure 123 has a certain pressure resistance, the positions of the insulating portion 121 and the hollow portion 122 of each conductive wire in the data transmission cable 100 may not be limited.

Further, as shown in fig. 3 and 4, in the present embodiment, the wires 1 are arranged at equal intervals, and the number of the arranged wires 1 in the arrangement direction of the wires 1 is between 3 and 50. Preferably, the data transmission cable 100 is arranged such that the center-to-center distance between the wires 1 is equal to the outer diameter of the wires 1, i.e. adjacent wires 1 are arranged adjacent to each other by the covering structure 123.

In addition, as another embodiment of the present invention, the covering structure 123 may not be provided, and the edge positions of the insulating portions 121 of the adjacent wires 1 are butted along the wire arrangement direction, so that the hollow portions 122 are enclosed between the butted adjacent insulating portions 121, that is, the hollow portions 122 can be protected without the covering structure 123 when the covering layer 2 is formed; at this time, the distance between the adjacent wires 1 may be smaller than the outer diameter of the wires 1.

As a further embodiment of the present invention, the covering structure 123 may also be arranged closer to the central conductor 11 or further away from the central conductor 11 than in the embodiments shown in fig. 3 and 4, which may achieve the object of the present invention.

In addition, the covering layers 2 are formed outside the insulating layers 12 of a plurality of the wires 1 together, namely, formed into a common single insulating layer; and the covering layer 2 is formed with an upper surface and a lower surface parallel to a plane in which the central axes of the plurality of conductors 11 are located. The arrangement of the upper surface and the lower surface of the covering layer 2 which are parallel to each other can effectively keep the arrangement of the wires 1, and prevent the twisting or folding phenomenon.

Moreover, the insulating part 121 and the covering layer 2 are preferably made of the same or similar materials; preferably, the data transmission cable 100 is made of the same kind of material, so that the covering layer 2 and the insulating layer 12 have good combinability when the data transmission cable 100 is formed, good fusion can be realized, the layering problem is reduced as much as possible, and the forming effect is good.

Further, the same kind of material is a hydrocarbon polymer, preferably high density polyethylene.

Further, the insulating layer 12 and the covering layer 2 may be preferably made of plastic materials with dielectric coefficients close to that of air, so that the impedance of the insulating layer 12 and the covering layer 2 may be relatively small, a relatively good signal transmission environment of the conductor 11 may be further provided, signal propagation delay may be reduced, crosstalk between signals may be reduced, high-speed and efficient signal transmission may be ensured, and signal attenuation may be reduced.

In this embodiment, the plurality of wires 1 have at least one pair of differential signal lines and two ground wires disposed on both sides of the differential signal lines. Therefore, interference around the differential signal line between the two differential signal lines can be eliminated through the grounding wire, the signal transmission environment of the differential signal line is guaranteed, and the signal transmission efficiency and stability are improved.

Under the signal transmission type configuration of the conductive wire, as another preferred embodiment of the present invention, as shown in fig. 5, only the differential signal wires may be configured as the conductive wire 1 having the hollow portion 122, and the outer circumferential surfaces of the central conductors of the ground conductive wires are formed as insulation covering regions and are correspondingly covered with insulation materials, that is, the insulation layer is formed to entirely cover the central conductors with the insulation portions. Of course, according to the signal transmission requirement, the ground wire may be disposed on only one side of the differential signal line, and the other side may be disposed on a wire of another transmission type.

In addition, in the embodiment, the hollow portions 122 of the adjacent differential signal lines are adjacently disposed along the arrangement direction of the conductive wires, so as to improve the coupling of the differential signal lines.

In addition, as shown in fig. 3 to 5, the data transmission cable 100 of the present invention further includes a metal shielding film 3 covering the outer side of the covering layer 2. The metal shielding film 3 is fixed on the outer side of the covering layer 2 through heat sealing, two ends of the metal shielding film 3 in the width direction are fixedly attached to one transverse side of the covering layer 2, and two transverse sides of the covering layer 2 are asymmetric.

As mentioned above, the covering layer 2 is integrally wrapped on the outer sides of the plurality of wires, and the metal shielding film 3 is fixedly wrapped on the outer side of the covering layer 2 through heat sealing. In the embodiment of the present invention, the metal shielding film 3 has a length matching the data transmission cable 100 and a width not less than the circumferential extension length of the data transmission cable 100. Therefore, the metal shielding film 3 can be directly coated completely at one time along the length direction and the width direction, the shielding continuity of the metal shielding film 3 is ensured, the phenomenon of any impedance discontinuity is avoided, and the signal transmission can be continuously and stably carried out. In addition, the metal shielding film 3 also has a fireproof function, so that the data transmission cable 100 can reach a horizontal flame-retardant grade FT-2 and a vertical flame-retardant grade VW-1.

As shown in fig. 4 and 5, as a preferred embodiment of the present invention, two ends of the metal shielding film 3 in the width direction are pressed and adhered to each other at one side of the data transmission cable 100 in the width direction, so that the metal shielding film 3 forms a covering portion 34 covering the covering layer 2 and a pressed portion 35 connected to one side of the covering portion 34. The covering part 34 completely covers the covering layer 2 in the circumferential direction to realize omnibearing shielding, the compression part 35 is fixed on one side, is convenient to fix and adhere, can realize tensioning and fixing of the metal shielding film 3, and further ensures the laminating tightness of the covering part 34 and the covering layer 2.

As described above, the metal shielding film 3 of the present invention is fixed to the outer side of the covering layer 2 by heat sealing, and during the molding, a heat sealing machine performs a step-by-step heat pressing along the width direction from one side of the data transmission cable blank covered with the covering layer 2, so that the metal shielding film 3 is adhesively fixed to the outer side of the covering layer 2, and the metal shielding film 3 is relatively attached and fixed to the other side of the covering layer 2 in the width direction.

The cover layer 2 has the above-mentioned upper surface and lower surface which are parallel to each other, and further has a left side surface 21 and a right side surface 22 which are located at both lateral sides of the plastic layer, the left side surface 21 and the right side surface 22 are arc-shaped and connect both ends of the upper surface and the lower surface, however, after being fixed by heat sealing, both lateral sides of the cover layer 2 are asymmetric in shape.

Specifically, two ends of the metal shielding film 3 in the width direction are oppositely attached to the right side of the covering layer 2, and a tip portion 221 is formed on the right side surface 22 at the opposite attachment position of the covering layer 2 corresponding to the metal shielding film 3. The right side surface 22 includes a first surface 222 connecting the tip portion 221 and the right end of the upper surface, and a second surface 223 connecting the tip portion 221 and the right end of the lower surface, and the first surface 222 and the second surface 223 have a circular arc curvature larger than that of the left side surface 21.

Further, in the present invention, the metal shielding film 3 at least has an aluminum foil layer 31 and an adhesive layer 32 disposed on a side of the aluminum foil layer 31 facing the cover layer 2, and the metal shielding film 3 is fixed to the outer side of the cover layer 2 by heat-sealing the adhesive layer 32; therefore, the metal shielding film 3 is simple and convenient to fix, and the Mylar layer is not required to be intervened and fixed, so that the whole cable can be thinner and more flexible; but also can be with air escape when cohering, because adopt the hot melt to cohere fixedly again, increase the combination dynamics and the adaptation of metallic shield membrane 3 and overburden 2 for exhaust air can't get into, reaches closely knit effect, and then reaches inseparable cladding, and high frequency transmission performance is good and soft frivolous effect.

Furthermore, the metal shielding film 3 of the present invention further has an insulating layer disposed on a surface of the aluminum foil layer 31 facing away from the cover layer 2, and the insulating layer can be disposed to replace the mylar layer in the prior art, and is insulated from the outside, and at the same time, protects the aluminum foil layer 31. Of course, the data transmission cable 100 of the present invention may further include a mylar layer outside the metal layer 3.

In summary, the insulation layer 12 outside the conductive wire 1 is redesigned, so that the insulation layer is at least partially exposed to the hollow portion 122 of the insulation layer 12 on the basis of convenient positioning or having an insulation installation portion, which is equivalent to exposing the central conductor 11 to the gas or air interlayer with the lowest dielectric constant, thereby minimizing the interference possibly generated when the conductive wire 1 or the data transmission cable 100 performs data transmission, and further improving the signal transmission performance.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. A wire having a center conductor, characterized by: the outer surface of the central conductor is provided with an insulation coverage area and a hollow-out area which are distributed along the circumferential direction, the wire further comprises an insulation layer arranged on the outer side of the central conductor, the insulation layer comprises an insulation portion correspondingly arranged on the outer side of the insulation coverage area and a hollow-out portion correspondingly arranged on the outer side of the hollow-out area of the central conductor, and the hollow-out area is exposed in the hollow-out portion.

2. The lead of claim 1, wherein: the insulating part has adjacently the lateral wall face in fretwork district, the insulating layer is still including setting up the cover structure in the fretwork portion outside, cover structure connects along the circumferencial direction set up relatively in the insulating part lateral wall face of fretwork portion both sides, cover structure with insulating part integrated into one piece.

3. The lead of claim 2, wherein: the outer surfaces of the insulating part and the covering structure are located on the same circumferential surface concentric with the central conductor.

4. The lead of any one of claims 1 to 3, wherein: the insulation footprints are symmetrically disposed along an axis of the center conductor.

5. The lead of claim 4, wherein: the insulation covering areas are symmetrically provided with a pair of insulation parts, and the insulation parts are arranged outwards in a fan shape from the center of the central conductor.

6. The utility model provides a data transmission cable, includes a plurality of wires that set up side by side, covers a plurality of the overburden in the wire outside, its characterized in that: at least part of the conductor is provided by the conductor as claimed in claim 2 or 3.

7. The data transmission cable of claim 6, wherein: the wire is provided with the insulating part in the direction perpendicular to the wire arrangement direction, and the covering layer integrally covers a plurality of plastic rubber covering layers of the wire.

8. The data transmission cable of claim 7, wherein: at least part of the leads comprise differential signal lines, and the hollow parts of the adjacent differential signal leads are adjacently arranged along the arrangement direction of the leads.

9. The data transmission cable of claim 8, wherein: the conducting wire also comprises a grounding conducting wire which is adjacently arranged on at least one side of the differential signal wire, and the outer circumferential surfaces of the central conductors of the grounding conducting wire are all formed into insulation covering areas and correspondingly covered with insulation materials.

10. The data transmission cable of claim 6, wherein: the hollow parts of at least part of the wires are arranged in the wire arrangement direction.

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