CN217134015U - Data line and charging device - Google Patents

Abstract

The application discloses data line and charging device, the data line includes an at least sinle silk, the sinle silk include electrically conductive heart yearn and wrap up in the outer insulating layer of electrically conductive heart yearn, wherein, the insulating layer includes range upon range of at least one deck first insulation layer and at least one deck second insulation layer, the dielectric coefficient on first insulation layer is less than the dielectric coefficient of second insulation layer. The data line of this application can reduce the electromagnetic wave because the decay that dielectric loss produced for the high frequency characteristic of signal is more reliable and more stable when the sinle silk is used for transmitting high frequency signal.

Description

Data line and charging device

Technical Field

The application relates to the technical field of electronics, in particular to a data line and a charging device.

Background

At present, the internal structure of a data line generally comprises two high-frequency signal lines (D +/D-) and a charging transmission line (VBUS), the length of the data line is generally within 2 meters, and when the length of the data line exceeds 2 meters, due to the problem that the high-frequency signal attenuation of the signal lines (D +/D-) is too large, devices connected with the data line, such as a mobile phone, a tablet personal computer and the like, cannot identify signals transmitted through the data line, and therefore charging or data transmission cannot be achieved.

Attenuation of high frequency electrical signals involves two aspects: 1) attenuation of electromagnetic waves due to dielectric loss (insulation); 2) attenuation of electromagnetic waves due to metal losses (copper core). When the attenuation of the signal exceeds a certain index, the signal received by the receiving end is too weak to be identified, and communication interruption is formed.

Currently, the attenuation of the signal is generally improved by: 1) an insulating material with a low dielectric coefficient, such as Fluorinated Ethylene Propylene (FEP) in Fluorinated plastics; 2) reducing the effective resistance of the metal core, such as using a copper core with silver-plated surface, or a copper core containing a certain proportion of metallic silver; 3) increasing the cross-section of the copper core metal. However, the above scheme inevitably doubles the cost of the data line, and the scheme (3) also results in a large increase in the size of the data line.

Therefore, improvement of the data line is required to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the present application provides a data line, the data line includes an at least sinle silk, the sinle silk include electrically conductive heart yearn and wrap up in the outer insulating layer of electrically conductive heart yearn, wherein, the insulating layer includes range upon range of at least one deck first insulating layer and at least one deck second insulating layer, the dielectric coefficient on first insulating layer is less than the dielectric coefficient of second insulating layer.

Illustratively, the insulating layer includes the second insulating layer and the first insulating layer stacked in this order from the inside to the outside, and the insulating layer further includes a third insulating layer provided on the outside of the first insulating layer.

Illustratively, the first insulating layer is made of at least one of the following materials: the first insulating material and the solid first insulating material are internally distributed with a plurality of air holes;

the second insulating layer is made of at least one of the following materials: the second insulating material and the solid second insulating material are internally distributed with a plurality of air holes;

the third insulating layer is made of at least one of the following materials: a third insulating material with a plurality of air holes distributed inside and a solid third insulating material;

when the first insulating layer comprises a first insulating material with a plurality of air holes distributed inside, and the second insulating layer comprises a second insulating material with a plurality of air holes inside, the proportion of the air holes in the second insulating layer is lower than that of the air holes in the first insulating layer;

when the first insulating layer comprises a first insulating material with a plurality of air holes distributed inside, and the third insulating layer comprises a third insulating material with a plurality of air holes inside, the proportion of the air holes in the third insulating layer is lower than that of the air holes in the first insulating layer.

The insulating layers further comprise at least two layers of the second insulating layers and at least two layers of the first insulating layers, wherein the second insulating layers and the first insulating layers are alternately stacked from inside to outside and wrap the conductive core wire.

Illustratively, the outermost layer and the innermost layer of the insulating layers are the second insulating layers, the at least two first insulating layers are arranged between the outermost second insulating layer and the innermost second insulating layer, and the second insulating layer is further arranged between the two adjacent first insulating layers.

Illustratively, the size of the pores ranges between 0.01mm and 0.03 mm; and/or

The total volume of the pores in the first insulating layer accounts for 10-40% of the total volume of the first insulating layer; and/or

The gas in the gas holes comprises at least one of the following gases: nitrogen, carbon dioxide, argon.

Illustratively, the dielectric coefficient of the first insulating layer is less than or equal to 2.1.

Illustratively, the material of the first insulating layer and the second insulating layer comprises thermoplastic plastics, wherein the thermoplastic plastics comprise at least one of polyethylene, polypropylene, polyvinyl chloride and fluoroplastic.

Illustratively, the wire core includes a signal line for transmitting a signal.

The application also provides a charging device, which comprises the data line.

In order to solve the technical problems existing at present, the present application provides a data line, the data line including at least one core, the core including a conductive core and an insulating layer wrapping the conductive core, the insulating layer including at least one first insulating layer and at least one second insulating layer, the first insulating layer having a dielectric coefficient lower than that of the second insulating layer, in the scheme of the present application, the insulating layer is configured as a stacked structure of a plurality of insulating layers, and the first insulating layer having a dielectric coefficient lower than that of the second insulating layer, so as to reduce the dielectric coefficient of the whole insulating layer, and further reduce the attenuation of electromagnetic waves caused by dielectric loss, so that the high frequency characteristics of signals are more stable and reliable when the core is used for transmitting high frequency signals, the signal receiving end can more easily recognize the signals, and the stability of data line signal transmission is improved, in addition, the scheme of the application enables the size of the data line to be controllable, and compared with the method for improving the signal attenuation which is commonly used at present, the scheme of the application is lower in cost.

Drawings

The following drawings of the present application are included to provide an understanding of the present application. The drawings illustrate embodiments of the application and their description, serve to explain the principles and apparatus of the application. In the drawings, there is shown in the drawings,

FIG. 1 is a schematic cross-sectional view of a data line according to an embodiment of the present application;

fig. 2 is an enlarged cross-sectional view of the core indicated by the arrow in fig. 1 of the present application.

Reference numerals:

data line 100 protective sleeve 11

Ground wire 13 of shielding layer 12

Signal line 14 power line 15

Conductive core 141 first insulating layer 143

Second insulating layer 142 third insulating layer 144

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. It will be apparent, however, to one skilled in the art, that the present application may be practiced without one or more of these specific details. In other instances, well-known features of the art have not been described in order to avoid obscuring the present application.

It is to be understood that the present application is capable of implementation in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Like reference numerals refer to like elements throughout.

It will be understood that, although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.

Spatial relational terms such as "under," "below," "under," "above," "over," and the like may be used herein for convenience in describing the relationship of one element or feature to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

Embodiments of the invention are described herein with reference to cross-sectional illustrations that are schematic illustrations of idealized embodiments (and intermediate structures) of the present application. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, embodiments of the present application should not be limited to the particular shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of the present application.

In order to solve the problem of attenuation of high-frequency electric signals in the data line, the application provides a data line, the data line includes at least one sinle silk, and the sinle silk includes electrically conductive heart yearn and wraps up the insulating layer outside electrically conductive heart yearn, and wherein, the insulating layer includes at least one deck first insulating layer and at least one deck second insulating layer of range upon range of, and the dielectric coefficient of first insulating layer is less than the dielectric coefficient of second insulating layer. In the scheme of this application, through setting up the insulating layer to multilayer insulating layer's laminated structure, and wherein the dielectric coefficient of first insulating layer is less than the second insulating layer, thereby reduce the dielectric coefficient of whole insulating layer, and then can reduce the decay that the electromagnetic wave produced because dielectric loss, make the high frequency characteristic of signal more reliable and more stable when the sinle silk is used for transmitting high frequency signal, signal receiver can discern this signal more easily, data line signal transmission's stability has been improved, and, the scheme of this application makes the size of data line controllable, compare the method of improving signal attenuation commonly used at present, the scheme cost of this application is lower.

The structure of the data line of the present application is explained and explained with reference to fig. 1 to 2, wherein fig. 1 is a schematic cross-sectional view of the data line in an embodiment of the present application; fig. 2 is an enlarged cross-sectional view of the core indicated by the arrow in fig. 1 of the present application.

As an example, the data line 100 of the present application includes at least one core, wherein the number of the cores in the data line 100 may be set reasonably according to the type of the actual data line 100, for example, as shown in fig. 1, the data line 100 includes, in order from inside to outside, a core, a shielding layer 1212 and a protective sleeve 11, the shielding layer 1212 and the protective sleeve 11 wrap all the cores, as shown in fig. 1, the data line 100 includes 8 cores, and the 8 cores are 2 signal lines 14, two power lines 15 and 4 ground lines 13, respectively, where the signal lines 14 transmit signals, and the ground lines 13 include a conducting wire for grounding, and the power lines 15 are used for transmitting electrical energy. In other examples, data line 100 may also include, for example, 5 cores, 10 cores, or other numbers of cores.

The core of the data line 100 is mainly explained by taking the structure of the signal line 14 for transmitting signals as an example, but it is understood that the core structure for the signal line 14 can be applied to other cores without contradiction.

As shown in fig. 2, a wire core such as the signal wire 14 includes a conductive core wire 141 and an insulating layer wrapped outside the conductive core wire 141, wherein the insulating layer includes at least one first insulating layer 143 and at least one second insulating layer 142 which are stacked, and a dielectric coefficient of the first insulating layer 143 is lower than a dielectric coefficient of the second insulating layer 142. Through setting up the insulating layer to the laminated structure of multilayer insulating layer to wherein the dielectric coefficient of first insulating layer 143 is less than second insulating layer 142, thereby reduces the dielectric coefficient of whole insulating layer, and then can reduce the electromagnetic wave because the decay that dielectric loss produced, makes the high frequency characteristic of signal more reliable and more stable when the sinle silk is used for transmitting high frequency signal, and signal receiving end can discern this signal more easily, has improved data line signal transmission's stability. The insulating layer may also serve to protect the conductive core 141 and to adjust the core capacitance, inductance, characteristic impedance, and other parameters.

For example, the dielectric coefficient of the first insulating layer 143 is less than or equal to 2.1, alternatively, the dielectric coefficient of the first insulating layer 143 may be between 2.0 and 2.1, while the dielectric coefficient of the second insulating layer 142 may be greater than 2.1, for example, between 2.2 and 2.4, the hardness of the second insulating layer 142 is higher than that of the second insulating layer 142, the dielectric coefficient of the insulating layer is reduced by using the first insulating layer 143 having a lower dielectric coefficient, and the decrease in physical properties due to the decrease in dielectric coefficient is compensated by using the second insulating layer 142 having a higher dielectric coefficient, so that the electrical properties of the core are improved while good physical properties are maintained.

Illustratively, the first insulating layer 143 includes at least one of the following materials: the first insulating material and the solid first insulating material are internally distributed with a plurality of air holes; the second insulating layer 142 is made of at least one of the following materials: the second insulating material with a plurality of air holes distributed inside and the solid second insulating material.

Alternatively, the material of the first insulating layer 143 and the second insulating layer 142 includes a thermoplastic, wherein the thermoplastic includes at least one of polyethylene, polypropylene, polyvinyl chloride, fluoroplastic, or other suitable thermoplastic, wherein the fluoroplastic includes, but is not limited to, Fluorinated ethylene propylene copolymer (FEP), thermoplastic polyester elastomer (TPEE), or Polytetrafluoroethylene (TPFE), wherein the first insulating layers 143 of different layers may be different materials or the same material, the first insulating layers 143 and the second insulating layers 142 of different layers may be different materials or the same material, and the second insulating layers 142 of different layers may be different materials or the same material.

The adjustment of the dielectric coefficients of the first insulating layer 143 and the second insulating layer may be achieved by, in one example, the second insulating layer is made of a solid insulating material, a plurality of air holes are distributed in the first insulating layer 143, the dielectric coefficient of the first insulating layer 143 is reduced by distributing the plurality of air holes in the first insulating layer 143, and the dielectric coefficient of the first insulating layer 143 may also be adjusted within a predetermined range by controlling the density of the distribution of the air holes in the first insulating layer 143 (i.e., the proportion of the air holes in the first insulating layer), for example, the total volume of the air holes in the first insulating layer 143 accounts for 10% to 40% of the total volume of the first insulating layer 143, so that the dielectric coefficient of the first insulating layer 143 may be adjusted to be in a range of 0 to 20% (i.e., the proportion of the reduction of the dielectric coefficient).

In another example, a plurality of pores are distributed in the first insulating layer 143, a plurality of pores are distributed in the second insulating layer 142, and the proportion of pores in the second insulating layer 142 is lower than the proportion of pores in the first insulating layer 143, so that the first insulating layer 143 has a lower dielectric coefficient than the second insulating layer 142 by making the proportion of pores in the second insulating layer 142 lower than the proportion of pores in the first insulating layer 143.

In the present application, when a plurality of pores are distributed in the first insulating layer 143, the gas in the pores in the first insulating layer 143 includes at least one of the following gases: nitrogen, carbon dioxide, argon or other suitable inert and non-toxic gas; when the plurality of pores are distributed in the second insulating layer 142, the gas in the pores in the second insulating layer 142 includes at least one of the following gases: nitrogen, carbon dioxide, argon or other suitable inert and non-toxic gas. Alternatively, the size of the air holes ranges from 0.01mm to 0.03mm, or other suitable sizes, which are not limited in this respect, and an ultra-fine and uniformly distributed air hole structure is used, so that the high-frequency characteristics of the data line are more stable and reliable.

In other examples, the first insulating layer 143 is made of a solid insulating material, the second insulating layer 142 is made of a solid insulating material, and the dielectric coefficient of the first insulating layer 143 is lower than that of the second insulating layer 142, and particularly, the first insulating layer 143 is located inside proximate to the conductive core line 141, and the second insulating layer 142 is located outside the first insulating layer 143, by which it is possible to improve signal attenuation using the characteristic of the first insulating layer 143 having a low dielectric coefficient and maintain the physical characteristics of the core line using the characteristic of the second insulating layer 142 having a high dielectric coefficient, thereby finally improving the electrical characteristics and the physical characteristics of the core line.

Specifically, the number of layers of the first insulating layer 143 and the second insulating layer 142 included in the insulating layer may be set as appropriate according to actual needs, for example, the first insulating layer 143 and the second insulating layer 142 may be one layer, the first insulating layer 143 may be an inner layer, and the second insulating layer 142 may be an outer layer, or the first insulating layer 143 may be an outer layer and the second insulating layer 142 may be an inner layer.

Alternatively, the first insulating layer 143 and the second insulating layer 142 may have other arrangements, for example, as shown in fig. 2, the insulating layers include the second insulating layer 142 and the first insulating layer 143 that are sequentially stacked from inside to outside, and the insulating layer further includes a third insulating layer 144, and the third insulating layer 144 is disposed on the outer side 143 of the first insulating layer. The third insulating layer is made of at least one of the following materials: a third insulating material having a plurality of pores distributed therein, and a solid third insulating material, where the third insulating material may be the same material as or different from the insulating material included in the first insulating layer (also referred to as the first insulating material herein), and the third insulating material may be the same material as or different from the insulating material included in the second insulating layer (also referred to as the second insulating material herein).

The dielectric constant of the third insulating layer 144 may be greater than that of the first insulating layer 143, for example, when the first insulating layer 143 includes a first insulating material in which a plurality of air holes are distributed, and the third insulating layer 144 includes a third insulating material having a plurality of air holes inside, the proportion of the air holes in the third insulating layer 144 is lower than that in the first insulating layer 143, so that the dielectric constant of the third insulating layer 144 is greater than that of the first insulating layer 143.

For another example, a plurality of pores are distributed in the first insulating layer 143, the second insulating layer 142 is a solid second insulating material, the third insulating layer 144 is a solid third insulating material, the outer layer and the inner layer maintain the physical properties of the insulating layers by using the solid insulating materials, and the pores in the middle layer are filled with gas to form a mixed material structure of insulating media and gas, for example, when the first insulating layer 143 comprises Polyethylene (PE) or polypropylene (PP), since the dielectric constant of PE or polypropylene is generally 2.2 to 2.4, and the dielectric constant of gas such as air is about 1, the pores in the first insulating layer 143 can reduce the overall dielectric constant of the first insulating layer 143 to 2.0 to 2.1, and further can reduce the dielectric loss generated when the electromagnetic wave passes through, and at the same time, the inner layer and the solid second insulating layer 142 provide physical strength, meanwhile, the inner layer and the outer layer serve as a boundary of the middle layer first insulating layer 143, which can ensure stability of electrical characteristics of the edge of the pore structure in the first insulating layer.

The figures may be implemented by any suitable method2, preparing a laminated structure of the insulating layers, for example, the first method: using a three-head type extrusion apparatus, in the core preparation process, one head uses a special head to supply nitrogen (N) ₂ ) And in the process of injecting the cable core insulating layer, the other two machine heads respectively extrude an inner layer and an outer solid layer, and the three machine heads simultaneously work to finally form the insulating layer with a 3-layer structure. 2) A blowing agent is used. A certain amount of foaming agent is mixed into the insulating rubber material, and the foaming agent is heated in an insulating extrusion process to generate various harmless gases such as carbon dioxide (CO) ₂ ) And the insulating rubber is expanded into a pore shape, so that the first insulating layer 143 of the middle layer is prepared, and the second insulating layer 142 of the inner layer and the first insulating layer 143 of the middle layer can be prepared and then the second insulating layer 142 of the outer layer can be prepared. The first insulating layer 143 with the air holes is used in the insulating layer in the scheme of the application, the first insulating layer 143 is prepared by using a common insulating material and a special processing technology, the material cost is low, the processing technology is simple, the effect of reducing the attenuation of signals in the data line can be achieved by introducing the first insulating layer 143, the use length of the data line, such as a mobile phone data line, can be increased to more than 3 meters and can reach 5 meters at most, and meanwhile, the size of a wire core can be controlled in a small range.

In one example, the insulating layers further include at least two second insulating layers and at least two first insulating layers, wherein the second insulating layers and the first insulating layers are alternately stacked and wrapped outside the conductive core from inside to outside, for example, 1 first insulating layer, 1 second insulating layer, and so on may be sequentially arranged from inside to outside, or 1 second insulating layer, 1 first insulating layer, and so on may also be sequentially arranged from inside to outside, and the number of specifically included first insulating layers and second insulating layers may be reasonably set according to actual needs.

In other examples, the outermost layer and the innermost layer of the insulating layers are second insulating layers, at least two first insulating layers are arranged between the outermost second insulating layer and the innermost second insulating layer, and the second insulating layer is further arranged between the adjacent two first insulating layers.

It is worth mentioning that the thicknesses of the first insulating layer and the second insulating layer in the insulating layers can be reasonably set as required, and the total thickness of the insulating layers can depend on the radial cross-sectional dimension of the conductive core 141 wrapped by the insulating layers, for example, taking fig. 2 as an example, the thickness of the second insulating layer in the inner layer can be 0.03-0.10mm, the thickness of the first insulating layer in the middle layer can be 0.3-10.0mm according to different devices, and the thickness of the second insulating layer in the outer layer can be 0.03-0.10 mm. By adjusting the thickness of each of the insulating layers, a range of dielectric coefficients can be obtained.

Generally, in order to satisfy various communication requirements, such as USB2.0, USB3.0, etc., and in order to satisfy signal attenuation, characteristic impedance, etc., the insulation layer needs to satisfy a certain thickness, which often results in a larger size and cross-sectional area of the core wire, and the larger area of the copper conductive core wire in the core wire with the longer size, the larger thickness of the insulation layer is, for example, a mobile phone data line of 3 meters, the diameter of the radial cross-section of the conductive core wire 141 of the core wire is substantially 0.60mm, and the thickness of the conventional insulation layer is 0.5mm, but based on the solution of the present application, the thickness of the insulation layer can be reduced to 0.15-0.20 mm.

Alternatively, the conductive core 141 may comprise a single metal wire, or the conductive core 141 may further comprise a combination of a plurality of metal wires, wherein the metal wires may be made of, for example, tin-plated copper, bare copper, or alloy copper.

In one example, the signal line 14 and the power line 15 are arranged in parallel, wherein the data line may include two signal lines 14, for example, a data positive and a data negative signal line. The outer surface of the insulating layer of the signal line 14 may be coated with a green or white insulating paint to indicate that the functional line is a data positive line (data + or D +) or a data negative line (data-or D-).

The power line 15 is used for transmitting electric energy, the two power lines are respectively a positive power line and a negative power line, and the power line 15 comprises a power line insulating layer and a core wire group coated by the power line insulating layer. The power supply line insulating layer may be made of an organic insulating material such as plastic, and an insulating varnish is coated on an outer surface thereof. Illustratively, the outer surface of the power line insulating layer may be coated with a red insulating paint to indicate that the function line is a power line (VCC). Illustratively, the core wire set of each power wire 15 includes a plurality of core wires twisted together or only one core wire, and the material of the core wires includes tin-plated copper, bare copper or alloy copper. Further, a plurality of core wires in the core wire group can be directly twisted together, or can be divided into a plurality of groups of core wires, then each group of core wires are respectively twisted, namely, the core wires in each group of core wires are twisted with each other, then each group of core wires are twisted with each other, and of course, each group of core wires can be untwisted.

The ground line 13 includes a ground line insulating layer and a core wire group covered with the ground line insulating layer, and is arranged in parallel with the power supply line 15. The ground insulating layer may be made of an organic insulating material, such as plastic, and coated with an insulating varnish on the outer surface to indicate that the core wire is the Ground (GND). The core wire set may include a plurality of core wires, each of which may be made of, for example, tin-plated copper, bare copper, or alloyed copper.

As shown in fig. 1, the shielding layer 12 of the data line 100 is used to cover various cores in the data line 100, such as the power line 15, the signal line 14, the ground line 13, and the like, and shield the radiation of various functional lines and the interference of external signals to the various cores. The shield layer 12 may be made of a conductive material, such as various suitable metallic materials. The shield layer 12 is exemplarily made of a non-magnetic material such as copper, aluminum, or the like, and has a structure such as a woven copper mesh (aluminum magnesium woven mesh) or a copper foil (aluminum foil), or the like.

Continuing to fig. 1, the data line 100 includes a protective sheath 11 located at the outermost side, where the protective sheath 11 is a hollow structure, and a central cavity of the protective sheath is used for accommodating various wire cores and shielding layers 12, so as to perform the functions of isolating and protecting the wire cores and shielding layers 12 covered by the protective sheath, thereby avoiding electric leakage and interference.

Optionally, the protective sheath 11 in the present application may be made of an organic insulating material, such as plastic, and may be any one of PC plastic, TPE plastic, ABS plastic, PS plastic, and PVC plastic.

In one example, the data line 100 of the present invention further includes a first connector (not shown) and a second connector (not shown) disposed at opposite ends of the data line 100 and connecting the respective cores within the data line 100.

The first and second connectors of the present application include, but are not limited to, USB a, USB B, USB C, Micro USB, HDMI, DP, and the like.

The data line may be adapted for a keyboard, mouse, modem, printer, scanner, digital camera, cell phone, tablet, electronic toy, electronic player, etc. The data line may also be used in conjunction with a charging device, such as a power adapter or charger, to charge an electronic device, such as a cell phone.

The method used by the first patent with the air holes in the insulating layer in the scheme of the application can reduce the attenuation of signals in the data line by using common materials and a special processing technology, can increase the use length of the mobile phone data line to more than 3 meters and can reach 5 meters at most, and can control the size of the wire core in a smaller range.

In summary, in the scheme of the application, the insulating layers are arranged to be of the laminated structure of the multiple insulating layers, and the dielectric coefficient of the first insulating layer is lower than that of the second insulating layer, so that the dielectric coefficient of the whole insulating layer is reduced, and further, the attenuation of electromagnetic waves caused by dielectric loss can be reduced, so that the high-frequency characteristic of a signal is more stable and reliable when the wire core is used for transmitting a high-frequency signal, the signal can be more easily identified by the signal receiving end, the stability of signal transmission of the data line is improved, and the size of the data line is controllable by the scheme of the application.

Further, the present application also provides a charging device, which may include the data line in the foregoing embodiment and a charging head connected to the data line, the charging head may be, for example, a power adapter or a charger, the charging head is used for connecting a power socket, and the data line is used for connecting the charging head and an electronic device, such as a mobile phone, etc., so as to charge the electronic device.

Since the charging device of the present application has the aforementioned data line, the same advantages as the aforementioned data line are also provided.

Although the example embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above-described example embodiments are merely illustrative and are not intended to limit the scope of the present application thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as claimed in the appended claims.

Claims (10)

1. The data line is characterized by comprising at least one wire core, wherein the wire core comprises a conductive core wire and an insulating layer wrapped outside the conductive core wire, the insulating layer comprises at least one first insulating layer and at least one second insulating layer which are stacked, and the dielectric coefficient of the first insulating layer is lower than that of the second insulating layer.

2. The data line according to claim 1, wherein the insulating layer includes the second insulating layer and the first insulating layer stacked in this order from inside to outside, and the insulating layer further includes a third insulating layer disposed outside the first insulating layer.

3. The data line of claim 2, wherein the first insulating layer is made of a first insulating material having a plurality of air holes distributed therein or is made of a solid first insulating material;

the second insulating layer is made of a second insulating material with a plurality of air holes distributed inside or made of a solid second insulating material;

the third insulating layer is made of a third insulating material with a plurality of air holes distributed inside or made of a solid third insulating material;

when the first insulating layer comprises a first insulating material with a plurality of air holes distributed inside, and the second insulating layer comprises a second insulating material with a plurality of air holes inside, the proportion of the air holes in the second insulating layer is lower than that of the air holes in the first insulating layer;

when the first insulating layer comprises a first insulating material with a plurality of air holes distributed inside, and the third insulating layer comprises a third insulating material with a plurality of air holes inside, the proportion of the air holes in the third insulating layer is lower than that of the air holes in the first insulating layer.

4. The data line of claim 1, wherein the insulating layers further comprise at least two layers of the second insulating layer and at least two layers of the first insulating layer, wherein the second insulating layer and the first insulating layer are alternately stacked from inside to outside and wrap the conductive core line.

5. The data line according to claim 4, wherein the outermost layer and the innermost layer of the insulating layers are the second insulating layers, the at least two first insulating layers are disposed between the outermost second insulating layer and the innermost second insulating layer, and a second insulating layer is further disposed between the first insulating layers of adjacent two layers.

6. The data line of claim 3, wherein the pores range in size from 0.01mm to 0.03 mm; and/or

The total volume of the pores in the first insulating layer accounts for 10% to 40% of the total volume of the first insulating layer.

7. The data line of claim 1, wherein the first insulating layer has a dielectric constant of less than or equal to 2.1.

8. The data line of claim 1, wherein the material of the first insulating layer and the second insulating layer comprises a thermoplastic, wherein the thermoplastic comprises at least one of polyethylene, polypropylene, polyvinyl chloride, fluoroplastic.

9. The data line of any one of claims 1 to 8, wherein the wire core comprises a signal line for transmitting signals.

10. A charging device, characterized in that it comprises a data line according to any one of claims 1 to 9.

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