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

Abstract

The invention discloses a horizontal steering wheel strip-shaped automatic magnetic attraction free stretching data line, a preparation method and application, the data line sequentially comprises a core flexible coated object, a middle flexible permanent 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: step A, extrusion molding; step B, orientating and magnetizing by a 180-degree constant magnetic field in the north-south direction to form a horizontal steering wheel strip-shaped initial shape; and the data line is magnetized to form a horizontal reverse wire rod shape, and is automatically magnetically attracted and freely stretched. The problem that automatic curling and magnetic attraction of the data line in the prior art are not completed in place is solved, samarium-iron-nitrogen magnetic performance of a magnetocrystalline anisotropy field far higher than that of other permanent magnet materials can be better exerted through improvement of a magnetizing mode, the data line has more advantages of temperature resistance, corrosion resistance and demagnetization resistance, and the data line is suitable for being used in the field of data lines. And the requirement of data line suction is met by thickening the magnetic layer.

Description

Technical Field

[0001] The present invention belongs to the field of magnetic materials, and particularly relates to a horizontal 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, a manufacturing method and equipment thereof. The electromagnetic insulating wire can effectively reduce the electromagnetic noise induced in the 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 material to meet the needs of EMC; 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 sections 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 magnetic attraction automatic curling free-stretching data cable, discloses a preparation method of a magnetic attraction automatic curling free-stretching data cable. 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 is found for samarium iron nitride magnetic powder. 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 welcomed by market consumers. However, the phenomenon that the automatic curling magnetic attraction of data cables on the market is 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 the coil to generate a constant magnetic field; Pulse electromagnetic magnetization: a momentary pulse of high current passes through the coil, causing the coil to generate a short-term ultra-strong magnetic field; Permanent magnet magnetization: magnetization through the constant magnetic field generated by permanent magnets; Softening and melting temperature: The softening and melting temperature of the magnetic layer or the outer layer is also the melting temperature of its matrix component; Flat data cable: has at least one parallel opposite surface in the axial direction, and one of the radial cross sections is a racetrack or square; the radial cross section of the circular data cable is a circle; Single data line: When adjacent data lines are horizontally adsorbed or magnetized, it is a single-line operation, which is suitable for shorter data lines; Folded data cable: When folded in the middle, when adjacent data cables are horizontally adsorbed or magnetized, the folded data cable is regarded as a single data cable, which is suitable for data cables with longer lengths. Summary of the invention

[0004] A method for preparing a horizontally directional strip-shaped automatic magnetically attracted free-stretching data cable, wherein the data cable comprises a flexible coating in the core, a flexible permanent magnetic coating layer in the middle and a flexible outer coating layer on the outside, which are tightly connected in sequence from the inside to the outside. The preparation method comprises the following steps: Step A, extrusion molding; Step B, a single data line or a folded data line is first pre-magnetized in a 180° constant magnetic field orientation in the north-south direction to be initially shaped into a horizontal coil strip; the pre-magnetization direction is maintained, and then magnetized to form a horizontal reverse coil strip that automatically magnetically attracts and freely stretches the data line.

[0005] The flexible covering on the core is a collection of flexible single wires such as power lines, data lines, etc. that realize various functions.

[0006] The first step is to magnetize the data line in a constant magnetic field orientation of 180° in the north-south direction, and the magnetic field strength is at least 5000Gs or above. The single data line or the folded data line is pre-magnetized by constant magnetic field orientation. At this time, the flexible permanent magnetic coating layer is at a softening melting temperature. After the data line is cooled and shaped, it is initially shaped into a horizontal magnetic suction cup strip; The softening and melting temperature of the flexible permanent magnetic coating layer is 120-130°C; The outer flexible outer layer of the data line has a softening and melting point temperature at least 30°C higher than that of the middle flexible permanent magnetic coating layer; The 180° constant magnetic field orientation pre-magnetization in the north-south direction, the single data line or the folded data line through the magnetic field routing speed is 10-120 meters / minute; The constant magnetic field orientation magnetization in the north-south direction of 180° is such that when a flat single data line or a folded data line passes through the constant magnetic field, the normal direction of the parallel surface is parallel to the magnetic field direction, and the thickness is magnetized; the radial direction of the circular data line is also the width direction, and one of the cross-sectional directions is parallel to the magnetic field direction; The constant magnetic field is a constant current electromagnetic device or a permanent magnet device in the north-south direction of 180° installed at the die orifice of the extrusion molding, near the die orifice, or away from the extrusion molding production line, and the constant magnetic field region is larger than the diameter of the data line; The area of the constant magnetic field region in the direction perpendicular to the magnetic field is 1×10 cm or 2×2 cm.

[0007] For the re-magnetization, the preliminarily shaped data line in the form of a coil is pulled apart, and the single data line or the folded data line passes through the constant magnetic field of 180° in the north-south direction with a magnetic field strength of 2 - 3 T, maintaining the original magnetization direction. After re-magnetization, the data line automatically magnetically attracts and freely stretches in a horizontally reversed coil shape; For the re-magnetization, the normal direction of the plane of the flat data line is parallel to the magnetic field direction, and the circular data line is magnetically attracted and dynamically magnetized during forward movement, which is consistent with the orientation magnetization magnetic field direction.

[0008] The softening melting point temperature of the flexible outer coating layer outside the data line is 150°C to 260°C; The flexible outer coating layer outside the data line 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.

[0009] The flexible permanent magnet magnetic coating layer is a flexible modified polymer composite 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 permanent magnet magnetic coating layer is a modified polymer processed by blending a thermoplastic elastomer TPE with a plasticizer and an additive, and the softening melting point is 50 - 150°C; The modified polymer is: 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, and with a density of 0.96 / cm and a softening point of 100 - 120°C 3A blend of at least one of polyethylene density, 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, thermoplastic polyurethane TPU at 110 - 130°C, plasticizer, and additives.

[0010] A horizontally-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. It is characterized in that the data cable is obtained by the preparation method of any of the above-mentioned vertically-steering-wheel-strip-shaped automatic magnetic-attraction free-stretching data cables.

[0011] An application of a horizontally-steering-wheel-strip-shaped automatic magnetic-attraction free-stretching data cable, characterized in that the data cable is obtained by the preparation method of any of the above-mentioned vertically-steering-wheel-strip-shaped automatic magnetic-attraction free-stretching data cables, and the data cable connectors are one of the USB type-c data connectors, lightning data connectors, and audio data connectors; The front and rear connector positions of the data cable are both at the outer circle of the horizontal magnetic suction strip, and the data cable is in a folded shape.

[0012] Beneficial effects The magnetization method of this embodiment has universality for magnetizing flexible wires; In Embodiments 1 to 6 of this example, first heat orientation pre-magnetization in a 0.8T constant magnetic field + then magnetize in a 2.5T constant magnetic field. This is a magnetization method designed for samarium iron nitride permanent magnets with an anisotropic field reaching 14T (about twice that of Nd-Fe-B compounds). There is no high-voltage pulse. One of the methods is that a high-performance sintered neodymium iron boron permanent magnet can meet the requirements of the pre-magnetization and re-magnetization magnetic field magnitudes. The technical solution of this application has safe and reliable magnetization operation, is friendly to the environment and human health, is easy to implement, and is easy to mass-produce. Of course, it is also suitable for other permanent magnet materials and soft magnetic materials with different performances.

[0013] 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 nitride and avoids the method of enhancing the surface magnetic field only by thickness; This magnetization method further solves the magnetization problem of samarium iron nitride in the use of wires. Based on the material properties of samarium iron nitride itself, with a Curie temperature as high as 476°C and a high intrinsic coercive force, the data cable has excellent characteristics in terms of 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 universality; the magnetic attraction of the horizontal disk steering wheel strip of the folded data cable makes the connectors on the periphery of the horizontal disk strip, which is convenient for use.

[0014] The technical solution of the present application will be further described below in conjunction with the accompanying drawings and specific embodiments. The technical solution and beneficial effects will become clearer. The listing of parameters related to the magnetic field size and size, legends, etc. do not limit the technical solution of the present application. Any non-creative addition, equivalent substitution, or recombination will fall within the protection scope of the technical solution of the present application. Description of the Drawings

[0015] Figure 1 is a schematic external view of a horizontally steering-wheel-shaped strip automatic magnetic-attraction free-stretching data cable in Embodiments 1 to 4 of the present technical solution. The direction indicated by the arrow in the figure is the magnetization direction of the normal line of the parallel plane. The front and back surfaces of the arrow have the maximum surface magnetism. The cross-section is a runway shape and a braided outer layer; Figure 2 is one of the schematic external views of a horizontally steering-wheel-shaped strip automatic magnetic-attraction free-stretching data cable in Embodiments 5 and 6 and Comparative Examples 1 and 2 of the present technical solution. The direction indicated by the arrow in the figure is the magnetic-attraction direction. The surface magnetism is the maximum. The cross-section is a square and a polymer outer layer; Figure 3 is one of the schematic cross-sectional views in the width direction of a horizontally steering-wheel-shaped strip automatic magnetic-attraction free-stretching data cable of the present technical solution. In the figure, 100 is the outer layer, 200 is the magnetic layer, and 300 is the flexible coating. Due to different actual data cables, the flexibility of the coating on the core, the number, arrangement, and wire diameter of the core wires, and the thickness of the magnetic layer are not as uneven as shown in 200. The measured thickness of the magnetic layer is recorded as the average value, and the surface magnetism is a range value. The size truly reflects the final effect of the thickness of the magnetic layer; Figure 4 is one of the schematic external views of the application of a horizontally steering-wheel-shaped strip automatic magnetic-attraction free-stretching data cable of the present technical solution. The data cable is in a folded state, and the connectors at both ends of the data cable are located at the outer circle of the strip at the same time; Figure 5 is a process flow chart for manufacturing a horizontally steering-wheel-shaped strip data cable of the present technical solution.

[0016] Referring to FIGS. 1-3, a method for manufacturing a horizontally steering-wheel-shaped strip automatic magnetic-attraction free-stretching data cable, the data cable sequentially includes, from the inside out, a flexible coating on the core, a flexible permanent magnet magnetic coating in the middle, and a flexible outer layer on the outside, which are tightly connected. The manufacturing method refers to the process flow chart of the horizontally steering-wheel-shaped strip data cable of the present technical solution in FIG. 5; Extrusion molding, the flexible permanent magnet magnetic coating in the middle of the data cable and the flexible outer layer on the outside are co-extruded or extruded successively; or: after the flexible permanent magnet magnetic coating in the middle of the data cable is extruded, a braided outer layer is added; both simultaneously coat the core layer; First, magnetize in a constant magnetic field with an orientation of 180° in the north-south direction. A single data line or a folded data line is pre-magnetized through the constant magnetic field orientation. At this time, the magnetic layer is at the softening and melting temperature of 120 - 130 °C, the magnetic field intensity is 8000 Gs. After the data line is cooled and shaped, it is initially shaped into a strip-like magnetic chuck in the horizontal direction. The flexible outer layer outside the data line has a softening and melting point at least 30 °C or higher than that of the flexible permanent magnetic magnetic coating layer in the middle. One of the running speeds of the single data line or the folded data line through the constant magnetic field is 90 m / min. The constant magnetic field is a north-south direction constant current electromagnetic or permanent magnetic device arranged at the extrusion die orifice. One of the constant magnetic field regions is 2×2 cm, which is larger than the diameter of the data line. The normal direction of the flat data line parallel plane is parallel to the magnetic field direction, and thickness magnetization is carried out. One of the radial cross-sections of the circular data line is parallel to the magnetic field direction. Then magnetize again. Pull open the data line that has been initially shaped into a strip. A single data line or a folded data line passes through a constant magnetic field. The magnetic field magnitude is 2.5 T. The normal direction of the flat data line parallel plane is parallel to the magnetic field direction, and thickness magnetization is carried out. The circular data line is magnetized during the passive magnetic adsorption and dynamic forward movement, maintaining the original magnetization direction. After re-magnetization, the data line continues to maintain the strip shape in the horizontal direction. The relevant parameters and magnetization results of the examples and comparative examples are recorded in Tables 1 and 2.

[0017] Extrusion molding: The flexible permanent magnetic magnetic coating layer in the middle of the data line and the flexible outer layer outside are co-extruded or extruded successively; or: After the flexible permanent magnetic magnetic coating layer in the middle of the data line is extruded and molded, a braided coating outer layer is added; in both cases, the core layer is coated at the same time. First, magnetize in a constant magnetic field with an orientation of 180° in the north-south direction. A single data line or a folded data line is pre-magnetized through the constant magnetic field orientation. At this time, the magnetic layer is at the softening and melting temperature of 120 - 130 °C, the magnetic field intensity is 8000 Gs. After the data line is cooled and shaped, it is initially shaped into a strip-like magnetic chuck in the horizontal direction. The flexible outer layer outside the data line has a softening and melting point at least 30 °C or higher than that of the flexible permanent magnetic magnetic coating layer in the middle. One of the running speeds of the single data line or the folded data line through the constant magnetic field is 90 m / min. The constant magnetic field is a north-south direction constant current electromagnetic device or permanent magnetic device arranged at the extrusion die orifice. One of the constant magnetic field regions is 2×2 cm, which is larger than the diameter of the data line. The normal direction of the flat data line parallel plane is parallel to the magnetic field direction, and thickness magnetization is carried out. One of the radial cross-sections of the circular data line is parallel to the magnetic field direction. Then magnetize again. Pull open the data line that has been initially shaped into a strip. A single data line or a folded data line passes through a constant magnetic field. The magnetic field magnitude is 2.5 T. The normal direction of the flat data line parallel plane is parallel to the magnetic field direction, and thickness magnetization is carried out. The circular data line is magnetized during the passive magnetic adsorption and dynamic forward movement, maintaining the original pre-magnetization direction. After re-magnetization, the data line continues to maintain the strip shape in the horizontal direction. The relevant parameters and magnetization results of the examples and comparative examples are recorded in Table 1 and Table 2.

[0018]

[0019] In the examples, the radial shapes of the data lines are respectively racetrack-shaped and square-shaped, and the outer sheaths are respectively braided layers and modified PP. The permanent magnet materials of the magnetic layer are respectively R450: 40% anisotropic ferrite + anisotropic samarium iron nitride, R750: 100% anisotropic samarium iron nitride, and the pellet shape is approximately spherical; the matrix component is a mixture of CPE added with at least one of POE, EVA, plasticizer and additives, and the softening and melting temperature is 120 - 130 °C. The softening and melting temperature of the outer sheath is greater than 160 °C, at least 30 °C or more higher than that of the magnetic layer. Among them, the modified PP is the outer flexible outer sheath, and the softening and melting point temperature is 160 - 260 °C, which is a modified mixture of polypropylene PP and at least one of ethylene propylene diene monomer, PPS, PVC, silica gel, plasticizer and additives.

[0020] In Comparative Example 1, because the softening and melting point of the outer sheath is the same as that of the magnetic material layer, the constant magnetic field orientation pre-magnetization cannot be completed at the softening and melting temperature of the magnetic layer, and the data line will be deformed; in Comparative Example 2, no pre-magnetization is adopted, and the surface magnetic field cannot be improved.

[0021] Record of the results of the examples: Table 2, for Examples 1 - 6 of the present technical solution, first orient at 0.8 T and magnetize at 2.5 T in a constant magnetic field, and then magnetize again with only a 2.5 T constant current field. The surface magnetic field can well meet the functions of automatic curling and free stretching of the data line. Table 2, Examples 1, 4, and 5 contain a samarium iron nitride material type with 40% anisotropic ferrite, and Examples 2, 3, and 6 contain a 100% samarium iron nitride material type. Although the anisotropic field of samarium iron nitride reaches 14 T, the magnetization of the present technical solution enables its surface magnetic field to well meet the needs of automatic curling and free stretching of the data line, avoiding meeting the suction requirement by thickening the magnetic layer. For Comparative Examples 1 and 2, without using constant magnetic field orientation magnetization, the surface magnetic field cannot be improved, and the magnetic properties of magnetic materials such as samarium iron nitride cannot be fully exerted. Finally, the horizontal disk strip shape is not strong enough in terms of morphology and adsorption.

[0022] Refer to Figure 4 , for the application of a horizontally steering wheel strip-shaped automatic magnetic attraction and free stretching data line, in the folded state of the data line, the front and rear interfaces are both on the outer circle of the horizontally disk strip shape, which is convenient for use.

[0023] Analysis: The technical solution of this application adopts the orientation pre-magnetization method, constant magnetic field plus running speed control, leaving enough rotation time for magnetic domains, that is, by extending the duration of the magnetic material in the magnetic field to exchange for enhancing the magnetic field intensity 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 tug-of-war between the rotation and disordering of the magnetic domains during the melting state and the cooling process, realizing the maximization of the rotation and maintenance of the magnetic domains of the same-sex or opposite-sex materials; After the data line is pre-magnetized and shaped by the constant magnetic field orientation, it is difficult to keep the two directions consistent when re-magnetized. The technical solution of this application is to use a single data line or a folded data line pulled out from the disk strip, and the circular data line rotates forward passively by magnetic attraction in the constant current field; the flat data line is positioned by two relatively parallel planes to ensure the consistency of the magnetic field directions before and after the two; By the different softening and melting points of different structural layer materials, it is ensured that the data line can still maintain its shape in the molten state of the magnetic layer, realizing the synchronous satisfaction of the rotation of the magnetic domains under lower resistance in the molten state and the shaping of the appearance of the data line; The folded data line is magnetized in the same way as a single data line, so that when the longer data line is used, the front and rear ends with interfaces are both at the outer circle of the horizontal steering wheel strip, which is convenient for use.

Claims

1. A preparation method of a horizontally - directed steering - wheel - shaped strip - type automatically magnetically - attracted and freely - stretchable data cable, characterized by: The data line includes a flexible inner covering layer covering the core, a flexible permanent magnetic coating layer in the middle, and a flexible outer covering layer on the outside, which are tightly connected in sequence from the inside out. Its preparation method includes the following steps: Step A, extrusion molding; Step B, a single data line or a folded data line is first pre-magnetized by orientation in a 180° constant magnetic field in the north-south direction to be preliminarily shaped into a horizontal steering wheel strip; then magnetized again according to the pre-magnetization direction to form a horizontal reverse steering wheel strip-shaped data line that can be automatically magnetically attracted and freely stretched.

2. The preparation method of a horizontally - oriented steering - wheel - shaped strip - type automatically magnetically - attracted and freely - stretchable data cable according to claim 1, wherein, For the pre-magnetization by orientation in a 180° constant magnetic field in the north-south direction, the magnetic field intensity is at least 5000 Gs or more. At this time, the flexible permanent magnetic coating layer is at the softening and melting temperature. After the data line is cooled and shaped, it is preliminarily shaped into a horizontal magnetic suction steering wheel strip.

3. The preparation method of any of the horizontal steering wheel strip-shaped automatic magnetic attraction free-stretching data cables according to claim 1 or 2, characterized in that, The softening and melting temperature of the flexible permanent magnetic coating layer is 120 - 130 °C.

4. The preparation method of any one of the horizontal steering wheel strip-shaped automatic magnetic attraction free-stretching data lines according to claim 1 or 2, characterized in that, The softening and melting point temperature of the flexible outer covering layer on the outside of the data line is at least 30 °C or more higher than that of the flexible permanent magnetic coating layer in the middle.

5. The preparation method of any one of the horizontal steering wheel strip-shaped automatic magnetic attraction free-stretching data cables according to claim 1 or 2, characterized in that, For the pre-magnetization by orientation in a 180° constant magnetic field in the north-south direction, one of the wire speeds is 10 - 120 m / min.

6. The preparation method of any one of the horizontal steering wheel strip-shaped automatic magnetic adsorption free-stretching data cables according to claim 1 or 2, characterized in that, For the pre-magnetization by orientation in a 180° constant magnetic field in the north-south direction, when a flat single data line or a folded data line passes through the constant magnetic field, the normal direction of the parallel plane is parallel to the magnetic field direction, and thickness magnetization is carried out; for a circular data line, one of the radial cross-sections is parallel to the magnetic field direction.

7. The preparation method of any of the horizontal steering wheel strip-shaped automatic magnetic attraction free-stretching data cables according to claim 1 or 2, characterized in that, The constant magnetic field is a 180° constant current electromagnetic device or a permanent magnetic device in the north-south direction arranged at the die orifice of the extrusion molding, near the die orifice, or away from the extrusion molding production line. The area of the constant magnetic field is larger than the diameter of the data line.

8. The preparation method of a horizontally-steered strip-shaped automatically magnetically-attracted freely stretchable data cable according to claim 1, characterized in that, For the re-magnetization, the preliminarily shaped steering wheel strip-shaped data line is pulled apart. A single data line or a folded data line passes through a 180° constant magnetic field in the north-south direction and is re-magnetized according to the pre-magnetization direction. The magnetic field strength is 2 - 3 T. After re-magnetization, the data line becomes a horizontal reverse steering wheel strip-shaped data line that can be automatically magnetically attracted and freely stretched.

9. The preparation method of any one of the horizontal steering wheel strip-shaped automatic magnetic attraction free-stretching data cables according to claim 1 or 8, characterized in that, For the re-magnetization, the normal direction of the parallel plane of the flat data line is parallel to the magnetic field direction. The circular data line is magnetized during the passive magnetic attraction and dynamic forward movement, which is consistent with the pre-magnetization magnetic field direction during orientation.

10. The preparation method of a horizontal steering wheel strip-shaped automatic magnetic adsorption free-stretching data cable according to claim 1, characterized in that, The softening and melting point temperature of the flexible outer covering layer on the outside of the data line is 150 °C to 260 °C.

11. The preparation method of a horizontally-steered strip-shaped automatically magnetically-attracted freely stretchable data cable according to claim 1, characterized in that The flexible outer covering layer on the outside of the data line is at least one of a polymer layer, a woven layer, a leather layer, and a decorative layer.

12. The preparation method of a horizontally-steered 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 magnetic material powder.

13. The preparation method of a horizontally - directed steering - wheel - shaped strip - type automatically magnetically - attracted and freely - stretchable data cable according to claim 12, characterized in that, The permanent magnetic 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.

14. The preparation method of a horizontally - directed steering - wheel - shaped strip - type automatic magnetic - attraction free - stretching data cable according to claim 12, 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 additives, and the softening and melting point is 50 - 150 °C.

15. A horizontally-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 vertical steering wheel strip-shaped data lines that can be automatically magnetically attracted and freely stretched described in claims 1 to 14.

16. Application of a horizontally - directed steering wheel strip - shaped automatic magnetic - attraction free - stretching data cable, characterized by The data line is prepared by the preparation method of any one of the vertical steering wheel strip-shaped data lines that can be automatically magnetically attracted and freely stretched described in claims 1 to 14. The data line connector is one of a USB type-c data connector, a lightning data connector, and an audio data connector.

17. The application of a horizontally - steering - wheel - strip - shaped automatically magnetically - attracted and freely - stretchable data cable according to claim 16, characterized in that, The front and rear connector positions of the data cable are both at the outer circle of the horizontal magnetic chuck strip, and the data cable is in a folded shape.

Images