Sun-shading curtain pre-tightening structure, sun-shading curtain and vehicle

Abstract

The invention discloses a sunshade curtain pre-tightening structure, a sunshade curtain and a vehicle, the sunshade curtain pre-tightening structure comprises a shell, an output shaft, a first elastic piece, a first magnetic piece and a second magnetic piece, the output shaft is rotatably mounted on the shell, and the output shaft is used for outputting tension; one end of the first elastic piece is connected with the shell, and the other end of the first elastic piece is connected with the output shaft to generate tension; the first magnetic piece is mounted on the first elastic piece; the second magnetic piece is mounted on the shell; magnetic force is generated between the second magnetic piece and the first magnetic piece, the magnetic force and the elastic force of the first elastic piece jointly act on the output shaft to enable tension output by the output shaft to be constant, and the magnetic force is generated between the second magnetic piece and the first magnetic piece, and the magnetic force and the elastic force of the first elastic piece jointly act on the output shaft to enable the tension output by the output shaft to be constant. Therefore, the curtain cloth is smoother in movement, and the stress of the curtain cloth is more uniform.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a sunshade curtain pre-tightening structure, a sunshade curtain and a vehicle. BACKGROUND

[0002] The pre-tightening structure of the sunshade curtain "tightens" the curtain fabric through continuous tension, offsets the sagging caused by gravity, keeps the curtain fabric in a flat state at all times, and ensures the effective realization of the sunshade function.

[0003] In the related art, the pre-tightening structure changes the tension outputted thereby as the curtain fabric is pulled out or retracted, resulting in a situation that the curtain fabric becomes more difficult to pull out as the curtain fabric is pulled out more, causing operation; and the change in tension causes the curtain fabric to be stuck and deviated in movement, increasing the friction loss between the curtain fabric and the guide rail and the reel, and also easily causing problems such as tearing of the curtain fabric and overloading and burning of the motor due to uneven stress. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a sunshade curtain pre-tightening structure that outputs constant tension during the pulling out or retraction of the curtain fabric.

[0005] The present application also provides a sunshade curtain having the above-mentioned sunshade curtain pre-tightening structure.

[0006] The present application also provides a vehicle having the above-mentioned sunshade curtain.

[0007] According to the sunshade curtain pre-tightening structure of the first aspect of the present application, the output shaft is rotatably installed in the housing, and is used to output tension; one end of the first elastic member is connected to the housing, and the other end of the first elastic member is connected to the output shaft to generate tension; the first magnetic member is installed in the first elastic member; the second magnetic member is installed in the housing; a magnetic force is generated between the second magnetic member and the first magnetic member, and the magnetic force and the elastic force of the first elastic member jointly act on the output shaft to make the tension outputted by the output shaft constant.

[0008] According to the sunshade curtain pre-tightening structure of the present application, a magnetic force is generated between the second magnetic member and the first magnetic member, and the magnetic force and the elastic force of the first elastic member jointly act on the output shaft to make the tension outputted by the output shaft constant, so that the curtain fabric moves more smoothly and is subjected to more uniform stress.

[0009] According to some embodiments of the present application, the first elastic member is a coil spring, the coil spring forms a first coil spring coil and a second coil spring coil, the first coil spring coil is connected with the second coil spring coil, an axis of the first coil spring coil is parallel to an axis of the second coil spring coil, the first coil spring coil is fixed with the output shaft, the second coil spring coil is connected with the housing, and the first magnetic member is mounted on the second coil spring coil.

[0010] According to some embodiments of the present application, the number of the first magnetic members is multiple, the multiple first magnetic members are fixed on the second coil spring coil, the multiple first magnetic members are located on a circumference, and a diameter of the circumference where the multiple first magnetic members are located changes with the winding of the second coil spring coil.

[0011] According to some embodiments of the present application, the second magnetic member is located at a center of the circumference where the multiple first magnetic members are located, and the second magnetic member has the same magnetism as the first magnetic members.

[0012] According to some embodiments of the present application, the sunshade curtain pre-tightening structure further comprises a latch, the housing is provided with a insertion hole, at least part of the output shaft is located in the housing, the output shaft is provided with a clamping groove, and at least part of the latch extends into the insertion hole and is clamped with the clamping groove to lock the pre-tightening force of the output shaft.

[0013] According to the sunshade curtain of the second aspect of the embodiments of the present application, the sunshade curtain comprises the sunshade curtain pre-tightening structure of the first aspect of the embodiments of the present application, and further comprises a cloth winding shaft and a driving structure, the cloth winding shaft is used for winding cloth, and the driving structure is rotationally connected with the cloth winding shaft, and the driving structure converts the rotation of the cloth winding shaft into the axial movement of the cloth winding shaft when the cloth winding shaft rotates.

[0014] According to the sunshade curtain of the embodiments of the present application, the driving structure converts the rotation of the cloth winding shaft into the axial movement of the cloth winding shaft, so that the cloth winding shaft rotates and moves axially at the same time, and the cloth moves along an inclined path under the action of the resultant force, thereby adapting to the inclination angle of the window frame.

[0015] According to some embodiments of the present application, the driving structure comprises a transmission rod and a transmission device, the transmission rod is provided with a spiral groove, the transmission device comprises a housing and a ball, the housing is fixedly connected with the cloth winding shaft, the ball is located between the housing and the spiral groove, at least part of the transmission rod is located in the housing, and the housing relatively rotates with the transmission rod to make the ball move in the spiral groove, so that the housing and the cloth winding shaft move axially.

[0016] According to some embodiments of the present invention, the transmission rod includes a rod body and a lubrication control assembly. The rod body has an oil passage inside, and the spiral groove is disposed on the outer wall of the rod body. The oil passage communicates with the spiral groove. The lubrication control assembly includes a sealing bead and a third elastic element. The sealing bead is located between the oil passage and the spiral groove. The third elastic element abuts against the sealing bead. The ball rolls along the spiral groove, abutting against the sealing bead, so that the lubricant in the oil passage enters the spiral groove.

[0017] According to some embodiments of the present invention, the sunshade further includes a sliding structure, the sliding structure including a bushing and a second elastic member, the bushing being fixedly connected to the fabric roll shaft, the bushing being circumferentially positioned with the output shaft and axially slidingly connected with the output shaft, and the two ends of the second elastic member respectively abutting against the bushing and the output shaft.

[0018] A vehicle according to a third aspect of the present invention, the vehicle including a sunshade according to the second aspect of the present invention described above.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of a sunshade curtain in an open state according to some embodiments of the present invention; Figure 2 for Figure 1 An exploded view of the sunshade curtain in its open state; Figure 3 for Figure 2 A three-dimensional diagram of the pre-tensioning structure of the sunshade curtain; Figure 4 for Figure 3 Exploded view of the pre-tensioning structure of the sunshade curtain; Figure 5 for Figure 3 A schematic diagram of the internal structure of the pre-tensioning structure of the sunshade curtain; Figure 6 for Figure 2 A cross-sectional view of the sliding structure of the sunshade curtain; Figure 7 for Figure 2 A three-dimensional diagram of the support axis of the sunshade curtain; Figure 8 for Figure 2 A three-dimensional sectional view of the fabric roller of the sunshade curtain; Figure 9 forFigure 1 A three-dimensional view of a partial structure of a sunshade curtain; Figure 10 for Figure 1 A cross-sectional view of the sunshade curtain; Figure 11 for Figure 10 A partial structural diagram of the sunshade curtain; Figure 12 for Figure 10 Another partial structural diagram of the sunshade curtain; Figure 13 for Figure 12 A magnified view of point A on the sunshade curtain; Figure 14 for Figure 1 A partial structural cross-sectional view of the sunshade from another perspective; Figure 15 for Figure 14 A schematic diagram of the lubrication control assembly for a sunshade curtain.

[0021] Figure label: 100. Sunshade curtain; 10. Sunshade curtain pre-tightening structure; 11. Housing; 110. First end cap; 1101. First cover body; 1102. Protrusion; 1104. Fixing hole; 1103. Guide block; 1105. Sealing groove; 111. Second end cap; 1110. Second cover body; 11101. Insertion hole; 1111. Snap-on part; 11110. Snap-on groove; 1112. Mounting base; 11120. Mounting cavity; 12. First elastic element; 120. First coil spring; 121. Second... 122. Spring coil; 13. Pull tab; 14. First magnetic component; 15. Second magnetic component; 16. First sealing ring; 17. Output shaft; 18. Snap-fit ​​groove; 19. Mounting groove; 20. Mounting end; 11. Shoulder shaft; 21. First mounting cavity; 22. Retaining ring; 21. Bearing; 22. Pin; 21. Sliding structure; 21. Bushing; 210. Main body; 2101. Second mounting cavity; 211. Sliding column; 2110. Chamfer; 212. Snap-fit ​​part; 213. 1. Extension column; 2130. Third mounting cavity; 22. Second elastic element; 23. Buffer element; 30. Fabric rolling shaft; 31. Main shaft; 32. Support shaft; 320. Shaft body; 321. Partition ring; 322. Support part; 3220. Support sleeve; 3221. Foaming part; 32210. Protrusion; 40. Mounting shell; 41. Receiving part; 410. Receiving groove; 42. Extension part; 43. Slot; 50. Curtain fabric; 60. Drive structure; 61. Transmission rod; 610. Rod body; 6101, spiral groove; 6102, oil inlet; 6103, oil passage; 611, sealing pin; 612, second sealing ring; 613, lubrication control assembly; 6130, sealing bead; 6131, third elastic element; 615, transmission sleeve; 62, transmission device; 620, housing; 6201, flange face; 6202, circulation groove; 621, ball bearing; 622, third sealing ring; 70, end cap assembly; 71, fixed cover; 710, opening; 72, plug. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] The following is for reference. Figures 1-15 A sunshade curtain according to an embodiment of the present invention is described, which is used in a vehicle.

[0024] Specifically, please refer to Figures 3 to 5According to a first aspect of the present invention, a sunshade pre-tensioning structure 10 includes a housing 11, an output shaft 16, a first elastic element 12, a first magnetic element 13, and a second magnetic element 14. The output shaft 16 is rotatably mounted on the housing 11 and is used to output tension. One end of the first elastic element 12 is connected to the housing 11, and the other end of the first elastic element 12 is connected to the output shaft 16 to generate tension. The first magnetic element 13 is mounted on the first elastic element 12. The second magnetic element 14 is mounted on the housing 11. A magnetic force is generated between the second magnetic element 14 and the first magnetic element 13. The magnetic force and the elastic force of the first elastic element 12 work together on the output shaft 16 to keep the tension output by the output shaft 16 constant.

[0025] In some embodiments, the housing 11 includes a first end cap 110 and a second end cap 111, which are fastened together to form the housing 11.

[0026] Specifically, the first end cap 110 includes a first cover body 1101, a protrusion 1102, and a guide block 1103. The protrusion 1102 extends from the side of the first cover body 1101 and is used to snap onto the second end cap 111, thus fixing the first end cap 110 to the second end cap 111. The guide block 1103 extends from the end face of the first cover body 1101. The guide block 1103 can be divided into multiple segments or integrated into one segment as needed. The guide block 1103 serves as a guide and provides circumferential support when the sunshade pre-tightening structure 10 is installed on the mounting shell 40. The first cover body 1101 is provided with a fixing hole 1104 and a sealing groove 1105. The fixing hole 1104 is used to fix the first end cap 110 to the mounting shell 40, and the sealing groove 1105 is used to install the first sealing ring 15.

[0027] The second end cap 111 includes a second cover body 1110, a snap-fit ​​portion 1111, and a mounting base 1112, both extending from the second cover body 1110. The snap-fit ​​portion 1111 has a snap-fit ​​groove 11110, which snaps into the protrusion 1102. The mounting base 1112 is used to mount the output shaft 16. A mounting cavity 11120 is formed on the mounting base 1112, and the end of the output shaft 16 is located in the mounting cavity 11120. The second cover body 1110 has an insertion hole 11101 for inserting a pin 19.

[0028] According to an embodiment of the present invention, the pre-tensioning structure 10 of the sunshade curtain generates a magnetic force between the second magnetic element 14 and the first magnetic element 13. The magnetic force and the elastic force of the first elastic element 12 work together on the output shaft 16 to keep the tension output by the output shaft 16 constant, thereby making the curtain 50 move more smoothly and the force on the curtain 50 more even. In related technologies, without the magnetic force generated by the second magnetic element 14 and the first magnetic element 13 acting on the first elastic element 12, the elastic force generated by the first elastic element 12 will increase during the process of pulling out the curtain 50. Therefore, the tension output by the output shaft 16 will also increase, resulting in increased force on the curtain 50, causing jamming and uneven force distribution.

[0029] According to some embodiments of the present invention, with reference to Figure 4 as well as Figure 5 The first elastic element 12 is a coil spring, which forms a first coil spring 120 and a second coil spring 121. The first coil spring 120 is connected to the second coil spring 121. The axis of the first coil spring 120 is parallel to the axis of the second coil spring 121. The first coil spring 120 is fixed to the output shaft 16. The second coil spring 121 is connected to the housing 11. The first magnetic element 13 is installed on the second coil spring 121.

[0030] The first spring coil 120 and the second spring coil 121 are the same spring, with both ends of the spring coiled together, and the center of each coil is hollow. For example, in Figure 5 In the middle section, the upper coil spring is coiled into a first coil spring 120. A pull tab 122 is formed at the center of the first coil spring 120 at the end of the coil spring. The pull tab 122 engages with the locking groove 160 of the output shaft 16, allowing the tension generated by the coil spring to be transmitted to the output shaft 16. The lower coil spring is coiled into a second coil spring 121, with a first magnetic element 13 disposed on the innermost coil. This structural design causes the circle formed by the inner circle of the second coil spring 121 to expand and contract during the pulling or retraction of the curtain 50, thereby changing the diameter of the circle containing the first magnetic element 13. This causes the magnetic force between the first magnetic element 13 and the second magnetic element 14 to change accordingly, keeping the tension of the output shaft 16 constant.

[0031] In an optional embodiment, the first elastic element 12 may also be a helical spring or a disc spring. When the first elastic element 12 is a helical spring or a disc spring, the installation position of the first elastic element 12 and the specific arrangement and installation position of the first magnetic element 13 and the second magnetic element 14 need to be changed accordingly.

[0032] According to some embodiments of the present invention, with reference to Figure 4 as well as Figure 5There are multiple first magnetic elements 13. Under the action of magnetic force, the multiple first magnetic elements 13 are attached to the second coil spring 121. The multiple first magnetic elements 13 are located on a circumference. The diameter of the circumference where the multiple first magnetic elements 13 are located changes as the second coil spring 121 is wound up.

[0033] The first magnetic element 13 is fan-shaped and can be configured as either an N pole or a S pole. The second magnetic element 14 is correspondingly configured as either an N pole or a S pole, making the magnetism of the second magnetic element 14 the same as that of the first magnetic element 13. The magnetic strength between the first magnetic element 13 and the second magnetic element 14 can be adjusted according to the preload response requirements. When the curtain 50 rises, the second coil spring 121 winds up towards the position of the first coil spring 120. At this time, the multiple first magnetic elements 13 open outward in the circumferential direction, from the attached... Figure 5 The state gradually changes to append Figure 4 In the state where the curtain 50 is fully extended, multiple first magnetic components 13 are joined together to form a circle. The magnetic force and the bending force of the first elastic component 12 are dynamically balanced, achieving a constant tension state for the curtain 50 throughout its upward movement. The same principle applies to the downward movement of the curtain 50.

[0034] There can be four or six first magnetic elements 13, and their number is not limited. Each first magnetic element 13 is conical. When multiple first magnetic elements 13 form a ring, the inner diameter of its smaller circular portion is equal to the outer diameter of the second magnetic element 14, and its larger circular portion is in contact with the inner circular portion of the second coil spring 121 to improve the stability of the first magnetic element 13 in the working state. Since the first magnetic element 13 is magnetic, the first elastic element 12 should not be made of ferromagnetic material. The material of the first elastic element 12 can be selected according to its mechanical properties, including but not limited to stainless steel.

[0035] According to some embodiments of the present invention, with reference to Figure 5 The second magnetic element 14 is located at the center of the circle containing the plurality of first magnetic elements 13, and the second magnetic element 14 has the same magnetism as the first magnetic element 13.

[0036] The second magnetic component 14 can be fixed to the first cover 1101 by insert injection molding, or a magnetic layer can be applied to the original non-magnetic magnetic column position, or the required magnetic layer can be covered on the column surface by adhesive or other processes.

[0037] The output shaft 16 is provided with a snap-fit ​​groove 160, a mounting groove 161, a shoulder shaft 163, a mounting end 162, and a first mounting cavity 164 in sequence along the axial direction. The snap-fit ​​groove 160 is used to connect the pull tab 122 and the pin 19. The mounting groove 161 is used to install the first sealing ring 15. The shoulder shaft 163 is used to prevent excessive impact caused by excessive axial movement of the fabric winding shaft 30 due to unexpected situations during the transmission of the transmission rod 61 and the transmission device 62. The mounting end 162 is provided with a spline, which realizes the circumferential positioning and axial movement connection between the output shaft 16 and the fabric winding shaft 30. The first mounting cavity 164 is used to connect with the sliding structure 20. The material of the output shaft 16 must be a self-lubricating material, including but not limited to POM, to ensure smooth operation.

[0038] The sunshade curtain pre-tightening structure 10 also includes a first sealing ring 15, a retaining ring 17, and a bearing 18. The first sealing ring 15 is installed in the sealing groove 1105 and the mounting groove 161 of the output shaft 16. The first sealing ring 15 isolates the sunshade curtain pre-tightening structure 10 from the outside world, ensuring the cleanliness of the internal environment of the structure.

[0039] The retaining ring 17 is used to axially limit the first coiled spring 120. The retaining ring rib on the retaining ring 17 is passed through the non-through snap-fit ​​groove 160, and then the inner ring of the bearing 18 is passed through one side of the output shaft 16 to achieve axial limitation of the first coiled spring 120.

[0040] The outer ring of bearing 18 is synchronously mounted on the mounting seat 1112 of the second end cover 111, and the mounting cavity 11120 of the mounting seat 1112 has a stepped surface to achieve axial positioning of bearing 18. Bearing 18 bears axial and radial forces, and its type can be selected from, but is not limited to, angular contact ball bearings and double tapered roller bearings.

[0041] According to some embodiments of the present invention, with reference to Figures 3 to 5 The pre-tightening structure of the sunshade 100 also includes a pin 19, the housing 11 is provided with a socket 11101, at least a portion of the output shaft 16 is located inside the housing 11, the output shaft 16 is provided with a snap-fit ​​groove 160, at least a portion of the pin 19 extends into the socket 11101 and snaps into the snap-fit ​​groove 160 to lock the pre-tightening force of the output shaft 16.

[0042] Because the pre-tensioning structure 10 of the sunshade curtain is a modular component, the pre-tensioning force (tension) is easy to adjust. After the pre-tensioning structure 10 of the sunshade curtain is assembled and pre-tensioned, the pin 19 is inserted into the interior through the insertion hole 11101 and passes through the head position of the snap-fit ​​groove 160 for locking the pre-tensioning force. After the sunshade curtain 100 is assembled, the pin 19 can be pulled out and the insertion hole 11101 can be sealed.

[0043] According to a second aspect embodiment of the present invention, the sunshade 100, with reference to Figure 1 as well as Figure 2The sunshade curtain 100 includes a sunshade curtain pre-tightening structure 10, a fabric roller 30, and a drive structure 60 according to the first aspect embodiment of the present invention. The fabric roller 30 is used to roll up the curtain fabric 50. The drive structure 60 is rotatably connected to the fabric roller 30. When the fabric roller 30 rotates, the drive structure 60 converts the rotation of the fabric roller 30 into axial movement of the fabric roller 30.

[0044] According to an embodiment of the present invention, the sunshade 100 has a drive structure 60 that converts the rotation of the fabric roller 30 into axial movement of the fabric roller 30, so that the fabric roller 30 rotates and moves axially at the same time, and the curtain 50 moves along an inclined path under the action of the resultant force, thereby adapting to the tilt angle of the window frame.

[0045] Specifically, refer to Figure 7 as well as Figure 8 The fabric rolling shaft 30 includes a main shaft 31 and a support shaft 32. The main shaft 31 is a hollow structure, and the support shaft 32 is provided inside the main shaft 31 to enhance its structural strength.

[0046] The support shaft 32 includes a shaft body 320, a partition ring 321, and a support portion 322. The diameter of the support portion 322 is larger than the diameter of both the shaft body 320 and the partition ring 321. Multiple support portions 322 are spaced apart on the shaft body 320. The specific number of support portions 322 can be adjusted according to different support requirements and is not limited thereto. The support portion 322 includes a support sleeve 3220, a foam portion 3221, and protrusions 32210 located at the edge of the foam portion 3221. The support sleeve 3220 is fitted onto the shaft body 320 with a clearance fit. The foam portion 3221 extends from the edge of the support sleeve 3220 and is made of foamed rubber. Foamed rubber has water absorption and expansion properties. When the material comes into contact with water, water molecules diffuse and capillary action penetrate into the material's interior, combining with hydrophilic groups to cause the material to expand in volume, forming a dual function of elastic and expansion-based water sealing. The foaming part 3221 is bonded to the support sleeve 3220 via insert injection molding. The protrusions 32210 are evenly distributed circumferentially along the foaming part 3221. Initially, the outer edge diameter of the foaming part 3221 is smaller than the inner diameter of the main shaft 31, facilitating installation. Before installation, water is evenly applied to the foaming part 3221, and assembly can proceed once the water molecules have fully penetrated the material. To prevent uneven support caused by excessive axial movement of the support sleeve 3220, partition rings 321 are provided on both sides.

[0047] Reference Figure 1 as well as Figure 2 The sunshade 100 also includes a mounting housing 40, which houses the sliding structure 20, the fabric roller 30, the curtain fabric 50, and the drive structure 60. The mounting housing 40 is also used to secure the sunshade pre-tensioning structure 10.

[0048] The mounting housing 40 includes a receiving portion 41 and extension portions 42 extending from the receiving portion 41. The receiving portion 41 forms a receiving groove 410, in which the sliding structure 20, the fabric roller 30, the curtain fabric 50, and the drive structure 60 are located. There are two extension portions 42, which form a slot 43 that communicates with the receiving groove 410, through which the curtain fabric 50 extends or retracts.

[0049] According to some embodiments of the present invention, with reference to Figure 9 as well as Figure 8 The drive structure 60 includes a transmission rod 61 and a transmission device 62. The transmission rod 61 is provided with a spiral groove 6101. The transmission device 62 includes a housing 620 and a ball 621. The housing 620 is fixedly connected to the fabric rolling shaft 30. The ball 621 is located between the housing 620 and the spiral groove 6101. At least part of the transmission rod 61 is located inside the housing 620. The housing 620 rotates relative to the transmission rod 61, causing the ball 621 to move in the spiral groove 6101, thereby causing the housing 620 and the fabric rolling shaft 30 to move axially.

[0050] The design of the spiral groove 6101 is matched with the axial movement stroke of the fabric roll shaft 30 and the curvature of the window frame. It can be a single-head spiral, or a double-head or multi-head spiral. In addition, the selection of the number of thread heads is also related to the pitch of the spiral groove 6101.

[0051] Reference Figure 14 The outer casing 620 includes a flange face 6201, which is fixedly connected to the main shaft 31 of the fabric roll shaft 30 via the flange face 6201. The outer casing 620 has a circulation groove 6202 inside, with both ends of the circulation groove 6202 communicating with the inner wall of the circulation groove 6202, so that the ball bearings 621 can circulate through the circulation groove 6202.

[0052] Reference Figure 9 The transmission device 62 also includes a third sealing ring 622, the shape of which corresponds to the spiral groove 6101. Specifically, the third sealing ring 622 is spiral-shaped. The third sealing ring 622 isolates the internal structure of the transmission device 62 from the outside world, ensuring its internal cleanliness, improving transmission efficiency, and preventing particulate matter from entering and causing abnormal noise. The third sealing ring 622 has high wear resistance, and its spiral direction is the same as that of the spiral groove 6101 to ensure the normal relative movement between the transmission rod 61 and the transmission device 62 during operation.

[0053] According to some embodiments of the present invention, with reference to Figure 9 , Figures 12 to 15The transmission rod 61 includes a rod body 610 and a lubrication control component 613. The rod body 610 has an oil passage 6103 inside, and a spiral groove 6101 is provided on the outer wall of the rod body 610. The oil passage 6103 communicates with the spiral groove 6101. The lubrication control component 613 includes a sealing bead 6130 and a third elastic element 6131. ​​The sealing bead 6130 is located between the oil passage 6103 and the spiral groove 6101. The third elastic element 6131 abuts against the sealing bead 6130. The ball 621 rolls along the spiral groove 6101 and abuts against the sealing bead 6130, so that the lubricant in the oil passage 6103 enters the spiral groove 6101.

[0054] The third elastic element 6131 is a coil spring, a spring sheet, or a disc spring. In this embodiment, the third elastic element 6131 is a coil spring. The third elastic element 6131 is partially located inside the oil passage 6103, and its two ends abut against the inner wall of the oil passage 6103 and the sealing bead 6130, respectively.

[0055] The rod 610 is also provided with an oil inlet 6102, which is connected to the oil passage 6103, through which lubricant is injected into the oil passage 6103. The transmission rod 61 also includes a sealing pin 611, a second sealing ring 612, and a transmission sleeve 615. After the lubricant is injected, the second sealing ring 612 provides circumferential sealing, and the sealing pin 611 provides fixation. The transmission sleeve 615 is installed between the support shaft 32 and the transmission rod 61. During the operation of the sunshade 100, the rod 610 neither rotates nor moves axially. The rod 610 drives the housing 620 of the transmission device 62 to rotate through the spiral groove 6101.

[0056] Reference Figure 9 The sunshade 100 also includes an end cap assembly 70, which includes a fixing cap 71 and a plug 72. The fixing cap 71 is fixed to the other end of the mounting housing 40. The fixing cap 71 has an opening 710 with an inclined guide surface at its edge. The opening 710 is used for the installation and guidance of the transmission rod 61. After the transmission rod 61 is engaged with the fixing cap 71, its axial position and circumferential rotation are restricted. The plug 72 engages with the opening 710 to seal it.

[0057] According to some embodiments of the present invention, with reference to Figure 6 as well as Figure 11 The sunshade curtain 100 also includes a sliding structure 20, which includes a bushing 21 and a second elastic member 22. The bushing 21 is fixedly connected to the cloth rolling shaft 30, the bushing 21 is circumferentially positioned with the output shaft 16 and the bushing 21 is axially slidably connected with the output shaft 16, and the two ends of the second elastic member 22 abut against the bushing 21 and the output shaft 16 respectively.

[0058] The bushing 21 includes a main body 210, a sliding post 211, a snap-fit ​​part 212, and an extension post 213. The bushing 21 is made of a self-lubricating material, including but not limited to POM, to ensure smooth operation.

[0059] The main body 210 is provided with a second mounting cavity 2101, which is used to mount the mounting end 162 of the output shaft 16. The inner wall of the second mounting cavity 2101 is provided with a spline. The spline of the second mounting cavity 2101 cooperates with the spline of the mounting end 162, so that the bushing 21 is circumferentially positioned with the output shaft 16 and can move axially relative to the output shaft 16.

[0060] A sliding post 211 extends from the main body 210 and is located within the second mounting cavity 2101, extending into the first mounting cavity 164. The end of the sliding post 211 is chamfered 2110 to facilitate its insertion into the first mounting cavity 164. A snap-fit ​​part 212 extends from the outer wall of the main body 210 and engages with the main shaft 31, thus connecting the sliding structure 20 to the fabric roll shaft 30.

[0061] The extension column 213 extends out from the main body 210 and is coaxially arranged with the main body 210. The extension column 213 is provided with a third mounting cavity 2130, which is engaged with the support shaft 32.

[0062] The second elastic element 22 is a spring, located in the second mounting cavity 2101. Both ends of the second elastic element 22 abut against the main body 210 and the output shaft 16, respectively, providing the elastic force for the roll shaft 30 to return to its original position. In actual operation, the axial relative position of the bushing 21 and the output shaft 16 does not reach the state shown in the diagram. A certain safe distance is maintained between them in the axial direction, meaning that the shoulder shaft 163 of the output shaft 16 and the left end face of the bushing 21 are not in contact. Under these conditions, the elastic performance of the second elastic element 22 is also within its elastic range. The second elastic element 22 is merely one embodiment of this solution; other buffer elastic media such as cylinders, hydraulic cylinders, and elastic materials are extensions of the above solution.

[0063] The sliding structure 20 also includes a buffer 23, which is located between the support shaft 32 and the extension column 213. The buffer 23 is used to absorb errors in the parts and their assembly. In this embodiment, the buffer 23 is a buffer ring.

[0064] According to an embodiment of the present invention, the sunshade 100 generates a magnetic force between the second magnetic element 14 and the first magnetic element 13. The magnetic force and the elastic force of the first elastic element 12 work together on the output shaft 16 to keep the tension output by the output shaft 16 constant, thereby making the curtain 50 move more smoothly and the force on the curtain 50 more even. In related technologies, without the magnetic force generated by the second magnetic element 14 and the first magnetic element 13 acting on the first elastic element 12, the elastic force generated by the first elastic element 12 will increase during the process of pulling out the curtain 50, so the tension output by the output shaft 16 will also increase, resulting in increased force on the curtain 50, causing jamming and uneven force. The drive structure 60 converts the rotation of the roll shaft 30 into axial movement of the roll shaft 30, so that the roll shaft 30 rotates and moves axially at the same time, so that the curtain 50 moves along an inclined path under the action of the resultant force, thereby adapting to the tilt angle of the window frame.

[0065] According to a third aspect of the present invention, the vehicle includes a sunshade 100 according to the second aspect of the present invention described above.

[0066] According to an embodiment of the present invention, a magnetic force is generated between the second magnetic element 14 and the first magnetic element 13. The magnetic force and the elastic force of the first elastic element 12 work together on the output shaft 16 to keep the tension output by the output shaft 16 constant, thereby making the curtain 50 move more smoothly and the force on the curtain 50 more even. The drive structure 60 converts the rotation of the roll shaft 30 into the axial movement of the roll shaft 30, so that the roll shaft 30 rotates and moves axially at the same time, so that the curtain 50 moves along an inclined path under the action of the resultant force, thereby adapting to the tilt angle of the window frame.

[0067] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0068] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0069] In the description of this invention, "a plurality of" means two or more.

[0070] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0071] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0072] In the description of this specification, the references to terms such as "some embodiments," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least some embodiments or examples of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0073] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pre-tensioning structure (10) for a sunshade curtain, comprising a housing (11), characterized in that: The sunshade pre-tensioning structure (10) also includes An output shaft (16) is rotatably mounted on the housing (11) and is used to output tension. A first elastic element (12) is connected at one end to the housing (11) and at the other end to the output shaft (16) to generate tension. The first magnetic element (13) is mounted on the first elastic element (12); The second magnetic element (14) is mounted on the housing (11). The second magnetic element (14) generates a magnetic force with the first magnetic element (13), and the magnetic force and the elastic force of the first elastic element (12) work together on the output shaft (16) to make the tension output by the output shaft (16) constant.

2. The sunshade curtain pre-tensioning structure (10) according to claim 1, characterized in that: The first elastic element (12) is a coil spring, which forms a first coil spring coil (120) and a second coil spring coil (121). The first coil spring coil (120) is connected to the second coil spring coil (121). The axis of the first coil spring coil (120) is parallel to the axis of the second coil spring coil (121). The first coil spring coil (120) is fixed to the output shaft (16). The second coil spring coil (121) is connected to the housing (11). The first magnetic element (13) is installed on the second coil spring coil (121).

3. The sunshade curtain pre-tensioning structure (10) according to claim 2, characterized in that: The number of the first magnetic element (13) is multiple. The multiple first magnetic elements (13) are fixed to the second coil spring (121). The multiple first magnetic elements (13) are located on a circumference. The diameter of the circumference where the multiple first magnetic elements (13) are located changes with the winding of the second coil spring (121).

4. The sunshade curtain pre-tensioning structure (10) according to claim 3, characterized in that: The second magnetic element (14) is located at the center of the circle containing the plurality of first magnetic elements (13), and the second magnetic element (14) has the same magnetism as the first magnetic element (13).

5. The sunshade curtain pre-tensioning structure (10) according to claim 1, characterized in that: The sunshade pre-tightening structure (10) also includes a pin (19), the housing (11) is provided with a socket (11101), at least a portion of the output shaft (16) is located inside the housing (11), the output shaft (16) is provided with a snap-fit ​​groove (160), at least a portion of the pin (19) extends into the socket (11101) and snaps with the snap-fit ​​groove (160) to lock the pre-tightening force of the output shaft (16).

6. A sunshade curtain (100), characterized in that: The sunshade curtain (100) includes a sunshade curtain pre-tensioning structure (10) as described in any one of claims 1-5, and the sunshade curtain (100) further includes... A fabric roller (30) is used to roll up the curtain fabric (50); A drive structure (60) is rotatably connected to the fabric roll shaft (30). When the fabric roll shaft (30) rotates, the drive structure (60) converts the rotation of the fabric roll shaft (30) into the axial movement of the fabric roll shaft (30).

7. The sunshade curtain (100) according to claim 6, characterized in that: The drive structure (60) includes a transmission rod (61) and a transmission device (62). The transmission rod (61) is provided with a spiral groove (6101). The transmission device (62) includes a housing (620) and a ball (621). The housing (620) is fixedly connected to the fabric winding shaft (30). The ball (621) is located between the housing (620) and the spiral groove (6101). At least part of the transmission rod (61) is located inside the housing (620). The housing (620) rotates relative to the transmission rod (61) to move the ball (621) in the spiral groove (6101), thereby causing the housing (620) and the fabric winding shaft (30) to move axially.

8. The sunshade curtain (100) according to claim 7, characterized in that: The transmission rod (61) includes a rod body (610) and a lubrication control assembly (613). The rod body (610) has an oil passage (6103) inside. The spiral groove (6101) is disposed on the outer wall of the rod body (610). The oil passage (6103) communicates with the spiral groove (6101). The lubrication control assembly (613) includes a sealing bead (6130) and a third elastic element (6131). The sealing bead (6130) is located between the oil passage (6103) and the spiral groove (6101). The third elastic element (6131) abuts against the sealing bead (6130). The ball (621) rolls along the spiral groove (6101) and abuts against the sealing bead (6130) to allow the lubricant in the oil passage (6103) to enter the spiral groove (6101).

9. The sunshade curtain (100) according to claim 6, characterized in that: The sunshade (100) also includes a sliding structure (20), which includes a bushing (21) and a second elastic element (22). The bushing (21) is fixedly connected to the roll shaft (30), the bushing (21) is circumferentially positioned with the output shaft (16), and the bushing (21) is axially slidably connected with the output shaft (16). The two ends of the second elastic element (22) respectively abut against the bushing (21) and the output shaft (16).

10. A vehicle, characterized in that: The vehicle includes a sunshade (100) as described in any one of claims 6-9.

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