Strip-shaped automatic magnetic attraction free stretching data line for vertical steering wheel and preparation method and application of strip-shaped automatic magnetic attraction free stretching data line

Abstract

The invention discloses a vertical steering wheel strip-shaped automatic magnetic attraction free stretching data line and a preparation method and application thereof.The data line sequentially comprises a core flexible coated object, a middle flexible permanent magnet magnetic coating layer and an outer flexible outer coating layer which are tightly connected from inside to outside, and the preparation method comprises the following steps that A, the flexible coated object, the middle flexible permanent magnet magnetic coating layer and the outer flexible outer coating layer are tightly connected; performing extrusion molding; and step B, pre-magnetizing is carried out for vertical steering wheel strip-shaped shaping, then 180-degree constant magnetic field orientation is carried out in the south-north direction, and finally magnetizing is carried out. According to the data line, the phenomenon that automatic curling and magnetic attraction of the data line are not completed in place in the prior art is solved, the samarium-iron-nitrogen magnetic performance far higher than that of a magnetocrystalline anisotropic field of other permanent magnet materials can be better exerted, the data line is resistant to temperature, resistant to corrosion and demagnetization and has more advantages, and the situation that the attraction requirement of the data line is met through a thickened magnetic layer is avoided.

Description

Technical Field

[0001] The present invention belongs to the field of magnetic materials, and particularly relates to a vertical steering wheel strip-shaped automatic magnetic attraction free-stretching data cable, a preparation method and an application thereof. Background Art

[0002] Application No. US10886587, an electromagnetic insulating wire and a manufacturing method and equipment thereof. The electromagnetic insulating wire can effectively reduce the electromagnetic noise induced in a conductor and has high flexibility. The application of magnetic materials in the data cable in this technical solution utilizes the magnetic permeability of its soft magnetic property to meet the EMC requirements; Application No. US14105515, a transmission cable with magnetic attraction, including: a tubular outer insulating sheath made of an electrically insulating material, in which magnetic substances are embedded; and wires, each wire having an insulator axially inserted into the tubular outer insulating sheath; and a metal core surrounded by the insulator. Therefore, the transmission cable can be repeatedly folded back and forth to form a bundle, so that the bent segments of the tubular outer insulating sheath can be fixed to each other or fixed to a magnetic attraction wall by magnetic attraction. This technology discloses the technical effect of magnetic attraction fixation by folding back and forth, but no technical means sufficient to support this effect is disclosed; Publication No. CN113674921B, a preparation method of a data cable with magnetic attraction automatic curling and free stretching, discloses a preparation method of a data cable with magnetic attraction automatic curling and free stretching. In this technical solution, the magnetic attraction force is concentrated on the end faces of adjacent data cables in the vertical direction, and the data cables can be maintained in the magnetic attraction normal state of curling and free stretching. A successful industrial application case for samarium iron nitride magnetic powder is found. The application of magnetic materials in the data cable in this technical solution utilizes its permanent magnetic material to meet the requirement of sufficient magnetic attraction force in the vertical direction. Once this data cable was launched into the market, it was warmly received by market consumers. However, the phenomenon that the automatic curling and magnetic attraction of data cables on the market are not in place is everywhere. How to make more full and ingenious use of the magnetic attraction force, perform safe magnetization, avoid meeting the magnetic attraction requirements by using more magnetic materials; optimize the storage method and size, make the appearance more attractive, and better improve the user experience. This is the unremitting pursuit of producers and researchers in the magnetic attraction application of magnetic materials in data cables; Referring to Table 6 of CN113674921B, the magnetocrystalline anisotropy field of samarium iron nitride is much higher than that of other permanent magnetic materials, and the anisotropy field reaches 14T, about twice that of Nd-Fe-B compounds. How to continue to solve the problem of saturation magnetization of samarium iron nitride in wire and make full use of the magnetic properties of samarium iron nitride still requires continuous efforts.

[0003] The following is a supplementary description of the concepts involved in the technical solution of this application: Constant current electromagnetic magnetization: Pass a constant direct current through a coil to generate a constant magnetic field; Pulse electromagnetic magnetization: Pass a momentary large pulsed current through the coil to generate a transient super-strong magnetic field in the coil; Permanent magnet magnetization: Magnetize through the constant magnetic field generated by the permanent magnet; Softening and melting temperature: The softening and melting temperature of the magnetic layer or the outer coating layer, which is also the melting temperature of its matrix components; One of the radial cross-sectional shapes of the flat data cable is a runway shape or a square shape; the radial cross-section of the circular data cable is circular; Single data cable: It is a single-line operation when adjacent data cables are vertically adsorbed or during the magnetization operation, and is suitable for data cables with a relatively short length; Folded data cable: It is folded in the middle. When adjacent data cables are vertically adsorbed or during the magnetization operation, the folded data cable is regarded as a single data cable, and is suitable for data cables with a relatively long length. Summary of the Invention

[0004] A preparation method of a vertical steering wheel strip-shaped automatic magnetic attraction free-stretching data cable. The data cable sequentially includes a flexible coated material in the core, a flexible permanent magnet magnetic coating layer in the middle, and a flexible outer coating layer outside from the inside to the outside. Its preparation method includes the following steps: Step A, extrusion molding; Step B, first pre-magnetize to form a vertical steering wheel strip shape, then orient in a 180° constant magnetic field in the north-south direction, and finally magnetize.

[0005] The flexible coated material in the core is an aggregate of flexible single wires such as power lines and data cables that realize various functions.

[0006] For the first pre-magnetization to form a vertical steering wheel strip shape, the extruded data cable, whether single or folded, is wound around a cylinder inside the solenoid, or coiled into a vertical disc shape and placed inside the solenoid. The axial centerline of the coiled data cable, the axial centerline of the cylinder, and the axial centerline of the solenoid are parallel or overlapping. The data cable in the coiled disc state is pulsed magnetized inside the solenoid, and the magnetic field intensity is at least 2.0 T or above; The cylinder inside the solenoid is installed on the base of a device that can adjust the lifting height and rotation speed. Both the upper and lower ends of the cylinder are longer than the axial length of the solenoid. As the cylinder rotates, one end of the extruded data cable enters the solenoid and exits from the other end of the solenoid after magnetization; The cylinder inside the solenoid is non-magnetic; The pulsed magnetization inside the solenoid is intermittent magnetization, but the preparation process is continuously carried out without interruption. The flexible data cable is pulsed magnetized once when the axial cumulative height of the coiled data cable inside the solenoid does not exceed 2 / 3 to 3 / 3 of the axial height of the solenoid, and the coiled data cable being magnetized is located in the middle of the axis of the solenoid.

[0007] The vertically oriented steering wheel strip-shaped pre-charged magnetic data cable with a 180° constant magnetic field in the north-south direction is heated to the softening and melting temperature of the magnetic layer. It is pulled into a single or folded data cable from the strip shape and magnetized with orientation through a 180° permanent magnet magnetic field or a constant current electromagnetic field in the north-south direction. The magnetic field strength is at least 5000 Gs or above. After cooling and shaping, it maintains a vertical magnetic chuck strip shape; One of the running speeds of the single or folded data cable through the permanent magnet magnetic field or the constant current electromagnetic field is 10 - 120 m / min, and one of the constant magnetic field magnetization regions is 2×2 cm or 1×10 cm; The normal direction of the plane of the flat data cable is parallel to the magnetic field direction. The radially circular data cable is magnetized with orientation during the passive magnetic chuck dynamic torsion forward movement, maintaining the original pulse pre-charging direction; The softening and melting temperature of the magnetic layer is 120 - 130 °C; The softening and melting temperature of the flexible outer layer is at least 30 °C or above higher than that of the intermediate flexible permanent magnetic coating layer; The softening point temperature of the external flexible outer layer is 150 °C to 260 °C; The external flexible outer layer is at least one of a polymer layer, a woven layer, a leather layer, and a decorative layer; The polymer layer includes a blend of at least one of polypropylene with a softening point of 160 - 180 °C, polychlorotrifluoroethylene with a softening point of 200 - 220 °C, polycarbonate with a softening point of 220 - 230 °C, silicone rubber with a softening point of 200 - 250 °C, polyphenylene sulfide modified polypropylene with a softening point of 180 - 220 °C, polyethylene terephthalate with a softening point of 250 - 260 °C, thermoplastic polyurethane TPU with a softening point of 150 - 180 °C, thermoplastic elastomer TPE with a softening point of 165 - 185 °C, a plasticizer, and an additive.

[0008] For the final magnetization, the data cable in the vertically curled strip state after orientation is magnetized by pulse in the solenoid or magnetized in the constant current field. It is pulled into a single or folded data cable from the strip shape through a permanent magnet magnetic field or a constant current electromagnetic field, and the magnetic field strength is at least 2.0 T or above.

[0009] The flexible permanent magnetic coating layer is a flexible modified polymer composite material layer filled with permanent magnet material powder; The permanent magnet material is at least one of anisotropic samarium iron nitride, isotropic or anisotropic ferrite, isotropic or anisotropic neodymium iron boron, cerium iron boron, and samarium cobalt; The matrix component of the flexible modified polymer composite material layer has a softening and melting temperature of 50 °C to 150 °C; The matrix components of the flexible modified polymer composite layer include: oil-filled polyvinyl chloride with a softening point of 70-115°C, oil-filled chlorinated polyethylene with a softening point of 75-90°C, oil-filled ethylene-propylene-diene monomer with a softening point of 90-110°C, polyolefin elastomer with a softening point of 50-120°C, polyethylene with a density of 0.96 / cm 3 at 100-120°C, poly-1-butene at 125-135°C, polyvinylidene chloride at 115-140°C, thermoplastic vulcanizate TPV at 100-150°C, low-temperature thermoplastic elastomer TPE at 60-130°C, at least one of thermoplastic polyurethane TPU at 110-130°C, plasticizer, and a blend of additives; The matrix components of the flexible permanent magnetic coating layer are a modified polymer processed by blending a thermoplastic elastomer TPE with a plasticizer and additives, and the softening point is 120-130°C.

[0010] A vertically steering-wheel strip-shaped automatic magnetic attraction free-stretching data cable, including one of the axisymmetric regular shapes with a circular, flat, or oval cross-sectional shape, and the data cable is made by the preparation method of any of the above vertically steering-wheel strip-shaped automatic magnetic attraction free-stretching data cables.

[0011] The application of a vertically steering-wheel strip-shaped automatic magnetic attraction free-stretching data cable, the data cable is made by the preparation method of one of the above vertically steering-wheel strip-shaped automatic magnetic attraction free-stretching data cables, and the data connector is one of USB type-c data connectors, lightning data connectors, and audio data connectors.

[0012] The front and rear connector positions of the data cable are at the same end of the vertically steering-wheel strip, and the data cable is in a folded shape.

[0013] Beneficial effects The magnetization method of this embodiment has universality for magnetizing flexible wires; In Examples 1 to 6 of this embodiment, first pulse shaping + 180° north-south direction constant magnetic field orientation + then pulse, this is a brand-new magnetization method for samarium-iron-nitrogen permanent magnets with an anisotropic field reaching 14T, about twice that of Nd-Fe-B compounds. The magnetic field directions in the three magnetization stages are kept consistent. The magnetization operation of the technical solution of this application is safe and reliable, friendly to the environment and human health, easy to implement, and easy to mass-produce; The surface magnetic field increases with the increase of the thickness of the magnetic layer. The magnetization method of this embodiment improves the full utilization of the magnetic properties of samarium-iron-nitrogen and avoids the method of enhancing the surface magnetic field only by thickness; The magnetization method of the technical solution of this application enables the use of samarium iron nitride in wire, further solving the magnetization problem. Based on the material properties of samarium iron nitride itself, it has a high Curie temperature of 476°C and a high intrinsic coercivity, and the data wire has its own advantages in corrosion resistance, processability, and anti-demagnetization ability; This technical solution can also be extended to various wires such as power cords, audio cables, video cables, and network cables, and has versatility; the folded data wire with a coiled strip has automatic magnetic attraction, making the longer data wire interfaces at the same end, which is convenient to use.

[0014] The technical solution of this application will be further described below in conjunction with the drawings and specific implementation manners, and the technical solution and beneficial effects will be clearer. The listing of relevant parameters such as the magnetic field strength and size, and the legends are not limitations to the technical solution of this application. Any non-creative addition, equivalent substitution, and recombination will fall within the protection scope of the technical solution of this application. Description of the Drawings

[0015] . Figure 1 , Figures 1 to 4 of the embodiment of this technical solution are schematic external views of a vertical steering wheel strip-shaped automatically magnetically attracted and freely stretchable data wire. The arrow in the figure indicates the magnetization direction of the normal line of the parallel plane. The upper and lower surfaces in the arrow direction have the strongest surface magnetism, and the cross-section is a runway type with a braided outer sheath; Figure 2 , Figures 5 and 6, Comparative Examples 1 and 2 of the embodiment of this technical solution are schematic external views of a vertical steering wheel strip-shaped automatically magnetically attracted and freely stretchable data wire. The arrow in the figure indicates the magnetic attraction direction. The upper and lower surfaces in the arrow direction have the strongest surface magnetism, and the cross-section is square with a polymer outer sheath; Figure 3 , Figure 7 is a schematic cross-sectional view of a vertical steering wheel strip-shaped automatically magnetically attracted and freely stretchable data wire in the width direction. In the figure, 100 is the outer sheath, 200 is the magnetic layer, and 300 is the flexible coating; In view of the actual situation, the coating of the core is flexible, the number, arrangement, and wire diameter of the core wires are different, and the thickness of the magnetic layer is not as uneven as shown in 200. The thickness recorded in Table 2 is the average value, and the surface magnetic measurement value is a range, which truly reflects the final effect of the thickness of the magnetic layer;

[0016] Figure 4 , Figure 8 is a schematic view of the application external structure of a vertical steering wheel strip-shaped automatically magnetically attracted and freely stretchable data wire. The data wire is in a folded state, the data wire interface is USB type-c, and the connectors at the head and tail of the data wire are at the same end face of the coiled strip in the same direction; Figure 5 , Figure 9 is a process flow chart for manufacturing a vertical steering wheel strip-shaped data wire of this technical solution. Specific Embodiments

[0017] Refer to Figures 1 - 3, A preparation method of a vertical steering wheel strip-shaped automatic magnetic attraction free-stretching data cable, the data cable sequentially includes, from the inside out, a flexible covering layer closely connected to the core, a flexible permanent magnet magnetic covering layer in the middle, and a flexible outer covering layer on the outside; The preparation method refers to Figure 5 The process flow chart of the preparation of the vertical steering wheel strip-shaped data cable in this technical solution,

[0018] Extrusion molding, the flexible permanent magnet magnetic covering layer in the middle of the data cable and the flexible outer covering layer on the outside are co-extruded or extruded successively; or: after the flexible permanent magnet magnetic covering layer in the middle of the data cable is extruded, a braided covering outer layer is added; First, perform vertical steering wheel strip-shaped shaping. The extruded data cable is wound around a cylinder inside a solenoid, or curled into a vertical disk strip and placed inside the solenoid. The axial center line of the data cable curl, the axial center line of the cylinder, and the axial center line of the solenoid are parallel or overlapping. In the curled disk strip state, the data cable completes pulse magnetization inside the solenoid, with a magnetic field intensity of 2.5T, forming a vertical steering wheel strip shape; Then, perform orientation. The obtained data cable is heated to the softening and melting temperature of the magnetic layer, which is 120 - 130 °C, and pulled from the disk strip shape. The single or folded data cable is oriented and pre-magnetized through a 180° permanent magnet magnetic field in the north-south direction or a constant current electromagnetic field, with a magnetic field intensity of 8000 Gs or above. The normal line of the parallel plane of the flat data cable is parallel to the magnetic field direction. The circular data cable is oriented and magnetized during passive magnetic attraction and dynamic torsion, maintaining the same direction as the original pulse magnetization direction; the data cable running speed in the constant magnetic field is 90 meters per minute, the constant magnetic field area is 2 × 2 cm, and after cooling and shaping, it maintains a vertical magnetic suction disk strip shape; Finally, perform magnetization. In the state of the vertical curled disk strip after orientation, the data cable completes pulse magnetization inside the solenoid again, with a magnetic field intensity of 2.5T.

[0019] The relevant parameters and magnetization results of the examples and comparative examples are recorded in Tables 1 and 2,

[0020]

[0021] In the examples, the radial shapes of the data cables are respectively runway-shaped and square-shaped; The shapes of the permanent magnet material pellets in the magnetic layer are approximately spherical, and the material types are respectively: R450: 40% anisotropic ferrite + anisotropic samarium iron nitride; R750: 100% anisotropic samarium iron nitride; The matrix component of the magnetic layer is a mixture of chlorinated polyethylene added with at least one of POE and EVA, a plasticizer, and an auxiliary agent, with a softening and melting temperature of 120 - 130 °C; The outer covering layers are respectively a braided layer and modified PP, and the softening and melting temperature of the outer covering layer is greater than 160 °C, at least 30 °C higher than the magnetic layer; Among them, the softening and melting point temperature of the modified PP is 160 - 260 °C, which is a modified mixture of polypropylene PP and at least one of ethylene propylene diene monomer (EPDM), polyphenylene sulfide (PPS), polyvinyl chloride (PVC), silica gel, plasticizer and additives.

[0022] In Comparative Example 1, since the softening temperature of the outer layer is the same as that of the magnetic material layer, the data cable deforms after being heated to the softening and melting temperature; in Comparative Example 2, since the orientation magnetization process is not adopted, only pulsed magnetization in the solenoid is used in Comparative Examples 1 and 2. Whether the temperature is increased or not during magnetization, or the number of magnetization times is increased, the surface magnetic field cannot be improved.

[0023] Refer to Figure 4 , one of the applications of the vertical steering wheel strip-shaped automatic magnetic attraction free-stretching data cable in this technical solution. When the data cable is in a folded state, the connectors at the head and tail of the data cable are on the same end face in the strip shape.

[0024] Result record: In Table 2, for Examples 1 - 6 of this technical solution, with the pulsed magnetization shaping + constant current orientation pre-magnetization + pulsed magnetization method, there is only 2.5T pulsed magnetization before and after. Although pulsed magnetization exceeding 3T is not adopted, the surface magnetic field can well complete the functions of automatic curling, coiling and free stretching of the data cable; In Table 2, the performances of Examples 1, 4, 5 with a permanent magnet material type containing 40% of anisotropic ferrite and Examples 2, 3, 6 with high anisotropy field of samarium iron nitride can all be used in the data cable, and the surface magnetic field can meet the requirements of automatic coiling and magnetic attraction of the data cable; For Comparative Examples 1 and 2, without the intermediate constant current field orientation magnetization, when the final pulsed magnetization is carried out and the number of times exceeds 2, the surface magnetic field cannot be improved, and the magnetic properties of samarium iron nitride cannot be fully exerted, and the data cable cannot well complete the automatic magnetic attraction of coiling in the vertical direction.

[0025] Analysis: In the orientation pre-magnetization method of this application's technical solution, with a constant magnetic field plus walking speed control, enough rotation time is left for the magnetic domains, that is, by extending the duration of the magnetic material in the magnetic field, the increase in magnetic field strength is used to improve the magnetization saturation; The design of the softening and melting temperature of the magnetic layer at 120 - 130 °C enables the magnetic domains of the magnetic material to achieve the best labor-saving equilibrium state in the process of rotation and disordering during the melting state and cooling process of the magnetic domains, realizing the maximization of the rotation and maintenance of the magnetic domains of the same-sex or opposite-sex materials; After the data cable is pulsed and shaped and then orientation magnetized, it is difficult to keep the two directions consistent. In the technical solution of this application, for the circular data cable, the single data cable after being pulled out from the coiled state rotates forward passively under magnetic attraction in a constant current field, and for the flat data cable, it is positioned by the normal direction of the two parallel planes to ensure the consistency of the magnetic field directions before and after; By virtue of the different softening points of materials of different structural layers, it is ensured that the data lines can still maintain their shape under the molten state of the magnetic layer, so as to simultaneously meet the requirements of the turning duration of magnetic domains under a lower resistance in the molten state and the appearance shaping of the data lines. The folded data line is subjected to the same magnetization operation as a single data line. When the longer data line is in use, the front and rear ends with connectors are at the same end of the vertical steering wheel bar, which is convenient for use.

Claims

1. A preparation method of a vertically steering-wheel-shaped strip automatic magnetic attraction free-stretching data cable, characterized in that, The data line sequentially includes, from the inside out, a flexible coating covering the core, a flexible permanent magnetic coating layer in the middle, and a flexible outer coating layer on the outside, which are tightly connected. Its preparation method includes the following steps: Step A, extrusion molding; Step B, first pre-magnetize and shape it into a vertical steering wheel strip, then orient it in a 180° constant magnetic field in the north-south direction, and finally magnetize it.

2. The preparation method of a vertically-steering-wheel strip-shaped automatic magnetic-attraction free-stretching data cable according to claim 1, characterized in that, The step of first pre-magnetizing and shaping it into a vertical steering wheel strip includes: the single or folded data line after extrusion molding is wound around a cylinder inside a solenoid, or curled into a vertical steering wheel strip and placed inside a solenoid. The axial center line of the curled data line, the axial center line of the cylinder, and the axial center line of the solenoid are parallel or overlapped. In the curled strip state, the data line completes pulsed magnetization inside the solenoid, and the magnetic field strength is at least 2.0 T or above.

3. The preparation method of any of the vertical steering wheel strip-shaped automatic magnetic attraction free-stretching data cables according to claim 1 or 2, characterized in that, The step of orienting the data line in a 180° constant magnetic field in the north-south direction includes: heating the vertically oriented steering wheel strip-shaped data line that has completed pre-magnetization to the softening and melting temperature of the magnetic layer, pulling the single or folded data line from the strip shape through a 180° permanent magnet magnetic field or a constant current electromagnetic field in the north-south direction for orientation pre-magnetization. The magnetic field strength is at least 5000 Gs or above. After cooling and shaping, it maintains the vertical magnetic suction steering wheel strip shape.

4. The preparation method of a vertically steering-wheel strip-shaped automatic magnetic attraction free-stretching data cable according to claim 3, characterized in that, The running speed of the single or folded data line passing through the permanent magnet magnetic field or the constant current electromagnetic field is one of 10 - 120 m / min.

5. The preparation method of a vertically-steered strip-shaped automatic magnetic-attraction freely stretchable data cable according to claim 3, characterized in that, When the single or folded data line passes through the permanent magnet magnetic field or the constant current electromagnetic field, the normal direction of the flat surface of the flat data line is parallel to the magnetic field direction. The circular data line is passively magnetically attracted and twists forward dynamically for orientation magnetization, and the magnetization is consistent with the magnetic field direction of the pre-magnetization.

6. The preparation method of a vertically-oriented steering wheel strip-shaped automatic magnetic attraction free-stretching data cable according to claim 3, characterized in that, The softening and melting temperature of the magnetic layer is 120 - 130 °C.

7. The preparation method of a vertically-steered strip-shaped automatic magnetic adsorption and freely stretchable data cable according to claim 1, characterized in that, The flexible outer coating layer has a softening and melting temperature that is at least 30 °C or higher than that of the flexible permanent magnetic coating layer in the middle.

8. The preparation method of a vertical steering wheel strip-shaped automatic magnetic attraction free-stretching data cable according to claim 1, characterized in that, The flexible outer coating layer on the outside is at least one of a polymer, a woven layer, a leather-like material, and a decorative layer.

9. The preparation method of any one of the vertical steering wheel strip-shaped automatic magnetic attraction free-stretching data cables according to claim 1 or 8, characterized in that, The softening and melting temperature of the flexible outer coating layer on the outside is 130 °C to 260 °C.

10. The preparation method of a vertically - oriented steering - wheel - shaped automatic magnetic - attraction freely - stretchable data cable according to claim 1, characterized in that, For the final magnetization, the oriented data line completes pulsed magnetization inside the solenoid in the curled strip state in the vertical direction, and the magnetic field strength is at least 2.0 T or above.

11. The preparation method of a vertical steering wheel strip-shaped automatic magnetic attraction free-stretching data cable according to claim 1, characterized in that, The flexible permanent magnetic coating layer is a flexible modified polymer composite layer filled with permanent magnet material powder.

12. The preparation method of a vertically-steered strip-shaped automatic magnetic-attraction freely stretchable data cable according to claim 11, characterized in that, The permanent magnet material is at least one of anisotropic samarium iron nitride, isotropic or anisotropic ferrite, isotropic or anisotropic neodymium iron boron, cerium iron boron, and samarium cobalt.

13. The preparation method of a vertical steering wheel strip-shaped automatic magnetic attraction free-stretching data cable according to claim 11, characterized in that, The matrix component of the flexible permanent magnetic coating layer is a modified polymer processed by blending a thermoplastic elastomer TPE with a plasticizer and an additive, and the softening point is 50 - 150 °C.

14. A vertically oriented steering wheel strip-shaped automatic magnetic attraction free-stretching data cable, including one of the axisymmetric regular shapes with a circular, flat, or oval cross-sectional shape, characterized in that, The data line is prepared by the preparation method of any one of the vertically oriented steering wheel strip-shaped automatically magnetically attracted and freely stretchable data lines described in Claims 1 to 13.

15. Application of a vertically-steering-wheel strip-shaped automatic magnetic-attraction freely-stretchable data cable, characterized by The data line is prepared by the preparation method of any one of the vertically oriented steering wheel strip-shaped automatically magnetically attracted and freely stretchable data lines described in Claims 1 to 13. The data line connector is one of a USB type-c data connector, a lightning data connector, and an audio data connector.

16. Use of a vertically-oriented steering-wheel-shaped automatically magnetically-attractable and freely stretchable data cable according to claim 15, characterized in that, The front and rear connector positions of the data line are on the same end face of the vertically magnetically attracted steering wheel strip, and the data line is in a folded shape.

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