CN212257017U - Data transmission cable with multiple groups of differential signal transmission units grounded - Google Patents
Data transmission cable with multiple groups of differential signal transmission units grounded Download PDFInfo
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- CN212257017U CN212257017U CN202020842722.2U CN202020842722U CN212257017U CN 212257017 U CN212257017 U CN 212257017U CN 202020842722 U CN202020842722 U CN 202020842722U CN 212257017 U CN212257017 U CN 212257017U
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Abstract
The utility model discloses a data transmission cable that multiunit difference signal transmission unit is ground altogether, include: arranging according to a set combination, and adopting a plurality of groups of differential signal transmission units and a plurality of ground wires which are attached by transparent insulating hot melting mylar and single-side conductive aluminum foil mylar; the differential signal transmission unit comprises a hot-melt copper foil mylar and a pair of differential signal wires wrapped by the hot-melt copper foil mylar; the outer side of the hot-melt copper foil mylar is a conductive side and is attached to the conductive side of the single-sided conductive aluminum foil mylar; the ground wire is connected in a manner of being attached to the conductive side of the single-sided conductive aluminum foil mylar. The utility model provides a data transmission cable of multiunit difference signal transmission unit common place has avoided directly can't closely laminate through two metal forming and causes the shortcoming of characteristic impedance change, has promoted data transmission's bandwidth, has reduced the insertion loss and has higher density simultaneously.
Description
Technical Field
The utility model relates to a data transmission cable technical field especially relates to a data transmission cable of multiunit differential signal transmission unit altogether.
Background
At present, the following three types of common data transmission cables are mainly used: the first one is to stick up and down 2 pieces of aluminum foil mylar to wrap up a group of differential signal transmission units, the aluminum foil mylar is used as a reference layer to connect the ground wire to be grounded; the second is to wrap a group of differential signal wires together with the ground wire through the aluminum foil mylar to be used as a group of differential signal transmission units, and the ground wire is positioned on one side of the central connecting line of the two conductors and is not on the same plane any more; the third is to wrap a group of differential signal wires together with 2 ground wires through aluminum foil mylar to be used as a group of differential signal transmission units, wherein the ground wires are positioned on the left side and the right side of the central connecting line of the two conductors and are positioned on the same plane;
however, the three schemes all have respective disadvantages, and in the first scheme, because two aluminum foils mylar are adhered together and cannot be tightly adhered to the left and right insulated places, the impedance at the place is changed, and the integrity of signal transmission is influenced; in the second scheme, after the aluminum foil and the insulation are stripped, the ground wire can be welded on the bonding pad only after the position of the ground wire is manually adjusted, and one ground wire grounding bonding pad needs to be distributed for each pair to enable the ground wire grounding bonding pad to normally work, so that the production efficiency and the quality are influenced; in the third scheme: the total width of the flat cable is too large, and the density is low; the processing efficiency is low during welding; the ground wire and the transmission unit which are positioned on the same plane are wrapped, the structure is unstable, and the distortion is easy to occur, so that the change of characteristic impedance caused by the influence of consistency is caused, and the integrity of signal transmission is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the problem that exists among the prior art, provide a multiunit difference signal transmission unit data transmission cable altogether, avoided directly can't closely laminate through two metal foils and cause the shortcoming of characteristic impedance change, promoted data transmission's bandwidth, reduced the insertion loss and had higher density simultaneously.
In order to achieve the above object, the utility model provides a multiunit differential signal transmission unit is data transmission cable altogether, include:
arranging according to a set combination, and adopting a plurality of groups of differential signal transmission units and a plurality of ground wires which are attached by transparent insulating hot melting mylar and single-side conductive aluminum foil mylar;
the differential signal transmission unit comprises a hot-melt copper foil mylar and a pair of differential signal wires wrapped by the hot-melt copper foil mylar;
the outer side of the hot-melt copper foil mylar is a conductive side and is attached to the conductive side of the single-sided conductive aluminum foil mylar; the ground wire is connected in a manner of being attached to the conductive side of the single-sided conductive aluminum foil mylar.
Preferably, the insulating side material of the single-side conductive aluminum foil mylar is insulating plastic mylar, and the conductive side material is an aluminum-based conductive metal foil.
Preferably, the outside of hot melt copper foil mylar is electrically conductive side, with the electrically conductive side laminating of the electrically conductive aluminium foil mylar of single face includes:
and the conductive side of the hot-melt copper foil mylar is directly attached to the conductive side of the single-side conductive aluminum foil mylar or is attached through a conductive hot melt adhesive.
Preferably, the ground wire is connected to the conductive side of the single-sided conductive aluminum foil mylar in a manner of being attached to the conductive side, and includes:
the ground wire is connected with the conductive side of the single-side conductive aluminum foil mylar in a direct laminating mode or in a conductive hot melt adhesive laminating mode.
Preferably, the pair of differential signal lines wrapped by the hot-melt copper foil mylar specifically is: the pair of differential signal wires is wrapped by the hot-melt copper foil mylar in a hot-melt mode.
Preferably, the transparent insulating hot-melt mylar is made of polyester resin.
Preferably, the differential signal line comprises a conductor and an insulating layer wrapped outside the conductor, and the insulating layer is made of any one of polyethylene, polypropylene, polytetrafluoroethylene and polyperfluoroethylpropylene copolymer.
Preferably, the material of the conductor and the ground wire is any one of silver-plated copper, tin-plated copper and bare copper.
Preferably, the size of the conductor and the ground wire is any one of 22 American wire gauge to 36 American wire gauge.
Compared with the prior art, the embodiment of the utility model provides a high-speed data transmission cable of multiunit difference signal transmission unit common ground possesses following beneficial effect at least:
1) the method that two conductors of each group of differential signal transmission units are integrally formed is adopted, so that the precision of the relative positions of the two conductors is improved; the design of the relative positions of the two conductors is more flexible; in subsequent production tests and the twisting and bending in the using process, the design structure can be better maintained, and the change of electrical performance parameters can not be caused;
2) each group of differential signal transmission units are independently shielded, so that the defect that characteristic impedance changes due to opening of a bonding gap possibly caused by directly bonding two metal foils is overcome, and the bandwidth of data transmission is improved;
3) the ground wires in the units are eliminated, and are connected with the ground wires through the aluminum foils to be grounded, so that the structures in the units are simpler and more compact, and the total width is reduced when the units are arranged in a rough manner; meanwhile, when the subsequent cable assembly is manufactured, the wire can be stripped and welded conveniently, and the production efficiency and the quality are improved;
4) the outermost layer of one side adopts a single-side aluminum foil mode, so that the cost is reduced, the thickness of the flat cable is reduced, and the flat cable is softer;
5) the difference of outermost two-layer pad pasting outward appearance makes things convenient for discernment direction when follow-up equipment, traces back the order of each unit group in the winding displacement easily when buckling the wiring.
Drawings
Fig. 1 is a schematic cross-sectional view of a data transmission cable with a group of differential signal transmission units connected to the ground according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a data transmission cable with multiple groups of differential signal transmission units grounded according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a data transmission cable with multiple groups of differential signal transmission units connected to the ground according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a data transmission cable with multiple groups of differential signal transmission units connected to the ground according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of a data transmission cable with multiple groups of differential signal transmission units connected to the ground according to an embodiment of the present invention;
fig. 6 is a schematic cross-sectional view of a data transmission cable with multiple groups of differential signal transmission units connected to the ground according to an embodiment of the present invention;
fig. 7 is a schematic cross-sectional view of a data transmission cable with multiple groups of differential signal transmission units connected to the ground according to an embodiment of the present invention.
Description of the main elements and symbols:
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a data transmission cable with multiple groups of differential signal transmission units grounded, including:
arranging according to a set combination, and adopting a plurality of groups of differential signal transmission units and a plurality of ground wires which are attached by transparent insulating hot melting mylar and single-side conductive aluminum foil mylar;
the differential signal transmission unit comprises a hot-melt copper foil mylar and a pair of differential signal wires wrapped by the hot-melt copper foil mylar;
the outer side of the hot-melt copper foil mylar is a conductive side and is attached to the conductive side of the single-sided conductive aluminum foil mylar; the ground wire is connected in a manner of being attached to the conductive side of the single-sided conductive aluminum foil mylar.
In this embodiment, it should be noted that a group of differential signal transmission units is formed by a pair of differential signal lines wrapped by a hot-melt copper foil mylar, where the hot-melt copper foil mylar is also called a copper foil mylar polyester tape, and the hot-melt copper foil mylar has a golden appearance, a uniform color, and no odor. It uses the high tensile strength and electric property of the two-way stretch polyester material to provide the coating insulation of the internal structure of the cable, and is suitable for the insulation of the composite wire material and other wire materials with multi-strand structures such as signal transmission lines, control lines and the like. In the embodiment, the ground wire and the differential signal transmission unit are arranged according to a certain combination through the transparent insulating hot melting mylar and the single-side conductive aluminum foil mylar and are jointed together. The copper foil layer is used as a reference surface of the differential signal line and is electrically connected with the single-side conductive aluminum foil mylar, and the ground wire is also electrically connected with the single-side conductive aluminum foil mylar, so that the grounding of the reference surface of the differential signal unit is realized. In addition, the mode that the single-side aluminum foil is adopted on the outermost layer of one side is adopted, so that the cost is reduced, the thickness of the flat cable is reduced, and the flat cable is softer; the outermost mode that adopts transparent hot melt mylar of another side for can see the true qualities of copper foil mylar externally, the outward appearance is better to look, has more the science and technology sense. And because the appearance of the two outermost layers of films is different, the direction can be conveniently identified in the subsequent assembly, and the sequence of each unit group in the flat cable can be easily traced when the wiring is bent.
In an embodiment of the present invention, the insulating side material of the single-sided conductive aluminum foil mylar is insulating plastic mylar, and the conductive side material is an aluminum-based conductive metal foil.
In this embodiment, the single-sided conductive aluminum foil has single-sided conductivity, the conductive side material is an aluminum-based conductive metal foil, which is a thin and continuous metal foil, and is usually also used as a conductor of a circuit board, and the ductility is good; the insulation plastic Mylar is a Mylar film, and the Mylar film has various color classifications of milky white, black, natural color, transparent color and the like. Mylar is divided into a plurality of materials, such as PET Mylar, PVC Mylar, PC Mylar, fireproof Mylar and the like. Common applications are: insulated, cushioned, abrasion resistant, sealed, and appearance-decorated mylar, where insulated plastic mylar is used.
In an embodiment of the present invention, the outside of the hot-melt copper foil mylar is a conductive side, and is attached to the conductive side of the single-sided conductive aluminum foil mylar, including:
and the conductive side of the hot-melt copper foil mylar is directly attached to the conductive side of the single-side conductive aluminum foil mylar or is attached through a conductive hot melt adhesive.
In this embodiment, the hot-melt copper foil mylar is a mylar with a single conductive surface, and the conductive side of the mylar is directly attached to the conductive side of the single conductive aluminum foil mylar, or attached through a conductive hot-melt adhesive, which has characteristics of no odor, a high melting point, and the like, and thus is excellent in environmental protection and washing resistance. Meanwhile, the hot melt adhesive net film has good air permeability, and products with high requirements on air permeability can adopt the hot melt adhesive net film as a raw material. The hot melt adhesive is adopted for bonding, so that the following advantages are achieved: 1) the bonding speed is high, the continuity is convenient, the automatic high-speed operation is realized, and the cost is low; 2) no solvent pollution and no combustion; 3) a drying process is not needed, and the bonding process is simple; 4) the product is solid, is convenient to package, transport and store, occupies small area and is convenient to store; 5) the adhesive has better bonding strength and flexibility; 6) the objects which can be bonded are wide, namely bonding and sealing; 6) the gloss and gloss retention are good, and the shielding properties are good. Of course, the hot melt adhesive bonding has corresponding disadvantages such as: the performance is limited, the heat resistance is not enough, the bonding strength is not high, and the chemical resistance is poor; special hot melting equipment such as a hot melt adhesive machine and a hot melt adhesive gun is required to be equipped for construction; since the adhesion is affected by weather, the adhesion may be directly bonded to the substrate to avoid such a drawback.
The utility model discloses in an embodiment, the ground wire through with the mode of the electrically conductive side laminating of the electrically conductive aluminium foil mylar of single face is connected, include:
the ground wire is connected with the conductive side of the single-side conductive aluminum foil mylar in a direct laminating mode or in a conductive hot melt adhesive laminating mode.
The utility model discloses an in one embodiment, a pair of differential signal line of hot melt copper foil mylar parcel specifically is: the pair of differential signal wires is wrapped by the hot-melt copper foil mylar in a hot-melt mode.
The utility model discloses in an embodiment, the material of transparent insulating hot melt mylar is polyester resin, and this material has following characteristics: the film has good mechanical property, the impact strength is 3-5 times that of other films, the folding resistance is good, and the film is resistant to oil, fat, olefine acid and dilute alkali and most solvents; the high-temperature and low-temperature resistant rubber has excellent high-temperature and low-temperature resistant performance, can be used for a long time within the temperature range of 120 ℃, can resist high temperature of 150 ℃ and low temperature of-70 ℃ in a short time, and has little influence on the mechanical performance of the rubber at high and low temperatures; the gas and water vapor permeability is low, and the gas, water, oil and peculiar smell barrier performance is excellent; the transparency is high, the ultraviolet ray can be blocked, and the glossiness is good; no toxicity, no smell, good sanitation and safety, and can be directly used for food packaging. Polyester resins are the most important species of thermoplastic polyesters.
In an embodiment of the present invention, the differential signal line includes a conductor and an insulating layer wrapped outside the conductor, and the insulating layer is made of any one of polyethylene, polypropylene, polytetrafluoroethylene, and fluorinated ethylene propylene copolymer.
In this embodiment, it is noted that the most commonly used in practice is polyperfluorinated ethylene propylene copolymer; also known as FEP, is applied to soft plastics and has lower tensile strength, wear resistance, and creep resistance than many engineering plastics. It is chemically inert and has a low dielectric constant over a wide range of temperatures and frequencies. The material does not ignite and can prevent the spread of flame. It has excellent wear resistance and low friction coefficient, and can be made into granular products for extrusion molding and molding, powder for fluidized bed and electrostatic coating, and aqueous dispersion. The semi-finished product is provided with a diaphragm. The method is mainly used for manufacturing linings of pipes and chemical equipment, surface layers of rollers and various electric wires and cables, such as aircraft hook wires, booster cables, alarm cables, flat cables and oil well logging cables. FEP films are also commonly used as thin coatings for solar collectors; the polytetrafluoroethylene is transparent to opaque, is easy to bend and has elasticity; the polyethylene is semitransparent, transparent and hard, and can be made into a transparent film; in view of characteristics, polytetrafluoroethylene can be widely used in various places where acid-base resistance and organic solvent resistance are required, and is not toxic to the human body per se, but PFOA, one of the raw materials used in the production process, is considered to have carcinogenic effect. Can work for a long time at the temperature of between 250 ℃ below zero and 180 ℃ below zero, and can resist all chemical products except molten metal sodium and liquid fluorine. The high-temperature resistant water pipe coating has the characteristics of high temperature resistance and small friction coefficient, not only can play a role in lubrication, but also becomes an ideal coating which is not stuck to the inner layer of a pot and a water pipe. Polyethylene is a thermoplastic resin prepared by polymerizing ethylene, has excellent low-temperature resistance (the lowest use temperature can reach-70 ℃ to-100 ℃), has good chemical stability, and can resist the corrosion of various acids and alkalis (except acid with oxidation property). The polyethylene is insoluble in common solvents at normal temperature, has small water absorption and excellent electrical insulation performance, but is sensitive to environmental stress (chemical and mechanical action), has poor thermal aging resistance, and has different properties depending on the variety and mainly on the molecular structure and density.
The utility model discloses in a certain embodiment, the conductor with the material of ground wire is any one of silvered copper, tinned copper and naked copper, and copper can take place oxidation reaction in the air, produces the verdigris, and the electric conductive property of cable will great weakening like this, so some producers just do the cable with tinning, nickel plating or high-end silvered copper wire, and tinned copper wire contrast naked copper electric conductive property can be more excellent, and certainly the cost also can be than the high some of naked copper, and to some engineering that will weld, tinned can more convenient welding. So that it is now common to use tin-plated copper as a conductor.
The utility model discloses in a certain embodiment, the conductor with the material of ground wire is any one of silvered copper, tinned copper and naked copper, and copper can take place oxidation reaction in the air, produces the verdigris, and the electric conductive property of cable will great weakening like this, so some producers just do the cable with tinning, nickel plating or high-end silvered copper wire, and tinned copper wire contrast naked copper electric conductive property can be more excellent, and certainly the cost also can be than the high some of naked copper, and to some engineering that will weld, tinned can more convenient welding. So that it is now common to use tin-plated copper as a conductor.
In one embodiment of the present invention, the conductor and the ground wire have any one of the dimensions 22 to 36 american wire gauge, abbreviated as AWG, which is a standard for distinguishing the diameter of the wire and is also called Brown & sharp wire gauge. The value preceding the AWG (e.g., 24AWG, 26AWG) indicates the number of holes through which the wire will pass before it forms the final diameter, with larger values leading to higher levels of wire passage through the holes and smaller diameters. Thick wires have better physical strength and lower electrical resistance, but the thicker the wire, the more copper is required to make the cable, which results in a heavier, more difficult to install, and more expensive cable. The challenge in cable design is to use as small a diameter of the conductors as possible (reducing cost and installation complexity) while at the same time ensuring that the maximum capacity of the conductors is achieved below the necessary voltage and frequency.
Referring to fig. 2 and 3, in an embodiment of the present invention, a data transmission cable with multiple sets of differential signal transmission units connected to the ground is provided, where fig. 2 is an overall structure diagram of the cable, and fig. 3 is a cross-sectional view of the cable; the cable consists of 12 groups of differential signal transmission units and 4 ground wires, wherein every 1 ground wire and every 4 groups of differential signal transmission units are arranged in a whole period, and finally the tail sides of the differential signal transmission units are connected with the ground wires.
Referring to fig. 4 and 5, an embodiment of the present invention provides a cross-sectional view of a data transmission cable with multiple groups of differential signal transmission units grounded, where the cable is composed of 12 groups of differential signal transmission units and 6 ground wires, the middle of the cable can be conveniently cut, and the cable is conveniently divided into two parts in the implementation application, and the cross-sectional view of the cable after the cable is divided into two parts is shown in fig. 5.
Referring to fig. 6, an embodiment of the present invention provides a cross-sectional view of a data transmission cable with multiple groups of differential signal transmission units grounded, where the cable is composed of 12 groups of differential signal transmission units and 7 ground wires.
Referring to fig. 7, in one embodiment of the present invention, a cross-sectional view of a data transmission cable with multiple groups of differential signal transmission units grounded is provided, where the cable is composed of 6 groups of differential signal transmission units and 4 ground wires.
It should be noted that in practical application, a plurality of groups of differential signal transmission units and a plurality of ground wires which are attached by transparent insulating hot-melt mylar and single-side conductive aluminum foil mylar are adopted; the above-disclosed embodiments are only preferred embodiments of the present invention, and certainly not limited to the scope of the present invention, which can be set according to specific requirements, and all or part of the procedures for implementing the above-described embodiments can be understood by those skilled in the art and equivalent variations made according to the claims of the present invention are still covered by the present invention.
Claims (9)
1. A data transmission cable having a plurality of groups of differential signal transmission units grounded in common, comprising:
arranging according to a set combination, and adopting a plurality of groups of differential signal transmission units and a plurality of ground wires which are attached by transparent insulating hot melting mylar and single-side conductive aluminum foil mylar;
the differential signal transmission unit comprises a hot-melt copper foil mylar and a pair of differential signal wires wrapped by the hot-melt copper foil mylar;
the outer side of the hot-melt copper foil mylar is a conductive side and is attached to the conductive side of the single-sided conductive aluminum foil mylar; the ground wire is connected in a manner of being attached to the conductive side of the single-sided conductive aluminum foil mylar.
2. The data transmission cable with multiple groups of differential signal transmission units connected to the ground in common according to claim 1, wherein the single-sided conductive aluminum foil mylar is made of insulating plastic mylar at the insulating side, and the single-sided conductive aluminum foil mylar is made of aluminum-based conductive metal foil at the conductive side.
3. The data transmission cable with multiple groups of differential signal transmission units connected to the ground in common according to claim 1, wherein the outer side of the hot-melt copper foil mylar is a conductive side, and is attached to the conductive side of the single-sided conductive aluminum foil mylar, and the data transmission cable with multiple groups of differential signal transmission units connected to the ground in common comprises:
and the conductive side of the hot-melt copper foil mylar is directly attached to the conductive side of the single-side conductive aluminum foil mylar or is attached through a conductive hot melt adhesive.
4. The data transmission cable with multiple groups of differential signal transmission units connected in common to ground according to claim 1, wherein the ground wire is connected in a manner of being attached to a conductive side of the single-sided conductive aluminum foil mylar, and comprises:
the ground wire is connected with the conductive side of the single-side conductive aluminum foil mylar in a direct laminating mode or in a conductive hot melt adhesive laminating mode.
5. The data transmission cable with multiple groups of differential signal transmission units grounded in common according to claim 1, wherein the pair of differential signal lines wrapped by the hot-melt copper foil mylar are specifically: the pair of differential signal wires is wrapped by the hot-melt copper foil mylar in a hot-melt mode.
6. The data transmission cable with multiple groups of differential signal transmission units connected to the ground in common according to claim 1, wherein the transparent insulating hot-melt mylar is made of polyester resin.
7. The data transmission cable with multiple groups of differential signal transmission units connected in common to ground according to claim 1, wherein the differential signal lines comprise conductors and insulating layers wrapped outside the conductors, and the material of the insulating layers is any one of polyethylene, polypropylene, polytetrafluoroethylene and fluorinated ethylene propylene copolymer.
8. The data transmission cable with multiple groups of differential signal transmission units connected in common to ground according to claim 7, wherein the material of the conductors and the ground wire is any one of silver-plated copper, tin-plated copper and bare copper.
9. The data transmission cable with multiple sets of differential signal transmission units connected in common to ground according to claim 7, wherein the size of the conductor and the ground wire is any one of 22 to 36 American wire gauges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020842722.2U CN212257017U (en) | 2020-05-19 | 2020-05-19 | Data transmission cable with multiple groups of differential signal transmission units grounded |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020842722.2U CN212257017U (en) | 2020-05-19 | 2020-05-19 | Data transmission cable with multiple groups of differential signal transmission units grounded |
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| CN212257017U true CN212257017U (en) | 2020-12-29 |
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| CN202020842722.2U Active CN212257017U (en) | 2020-05-19 | 2020-05-19 | Data transmission cable with multiple groups of differential signal transmission units grounded |
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