Multi-coordinate linkage mechanism based on flexible lifting screen and linkage control method

Abstract

The application provides a multi-coordinate linkage mechanism and linkage control method based on a flexible lifting screen, comprising a screen module and a cladding body, the screen module comprises a display screen, a hinge and a central shaft, the display screen is arranged in the hinge, the display screen and the hinge are arranged outside the central shaft and are attached to the central shaft, the cladding body is made of flexible material and is arranged outside the screen module, further comprising an upper traction assembly and a lower traction assembly, the upper traction assembly is connected to the upper end of the display screen and is used to drive the upper end of the display screen to move, and the lower traction assembly is connected to the lower end of the display screen and is used to drive the lower end of the display screen to move. The application aims to provide a multi-coordinate linkage mechanism and linkage control method based on a flexible lifting screen, which can avoid the problem that the lower end of the flexible screen is wrinkled due to insufficient traction when the flexible screen is lowered, thereby affecting use.

Description

Technical Field

[0001] This invention relates to the field of flexible lifting screen technology, and in particular to a multi-coordinate linkage mechanism and linkage control method based on a flexible lifting screen. Background Technology

[0002] In recent years, flexible foldable screen phones have become another trend in the development of smart devices. The main technical challenges in the development of foldable screens lie in the foldable screen itself, the foldable screen hinge, and the lifting structure.

[0003] In the prior art, patent document CN210223370U discloses a lifting mechanism, a flexible screen display device, and an electronic device, specifically disclosing a lifting assembly and a driving assembly. The lifting assembly includes at least one lifting member, each lifting member having a movable end connected to the object. The driving assembly includes a driving cylinder connected to the at least one lifting member, the driving cylinder driving the at least one lifting member to extend or retract, causing the movable end to lift or lower the object. A flexible screen display device equipped with the lifting mechanism and an electronic device equipped with the flexible screen display device are also provided.

[0004] In the above structure, the lifting of the flexible screen is driven by a lifting component, which adopts a telescopic structure and is driven by pneumatics. However, the lifting component is only connected to the upper end of the flexible screen, while the lower end of the flexible screen is not equipped with a traction structure. When the flexible screen needs to move downward, the flexible screen material itself is relatively soft, and wrinkles may appear at the lower end of the flexible screen, which seriously affects its use. To address the above situation, it is necessary to design a multi-coordinate linkage mechanism and linkage control method based on the flexible lifting screen, which can avoid the problem of wrinkles appearing at the lower end due to insufficient traction when the flexible screen descends, thus affecting its use. Summary of the Invention

[0005] This invention provides a multi-coordinate linkage mechanism and linkage control method based on a flexible lifting screen, which can avoid the problem of wrinkles at the lower end of the flexible screen due to insufficient traction when it descends, thus affecting its use.

[0006] Therefore, the technical solution adopted is a multi-coordinate linkage mechanism based on a flexible lifting screen, comprising a screen module and a covering body. The screen module includes a display screen, a hinge, and a central axis. The display screen is fitted to the hinge, and the display screen and the hinge are arranged around and fitted to the central axis. The covering body is made of a flexible material and covers the outside of the screen module. It also includes an upper traction component and a lower traction component. The upper traction component is connected to the upper end of the display screen to drive the upper end of the display screen to move, and the lower traction component is connected to the lower end of the display screen to drive its movement.

[0007] Preferably, the upper traction assembly includes:

[0008] An upper fixing plate is provided on the upper end of the display screen, and the upper fixing plate is disposed on the upper extension surface of the display screen.

[0009] The first fixed base is provided obliquely above the inner central axis of the hinge. The two first fixed bases are symmetrically arranged along the central axis, and the first fixed base is provided with a first linear guide rail, which is obliquely upward and parallel to the hinge.

[0010] An upper fixing bar is provided at the upper end of the first linear guide rail. The upper fixing bar is horizontally arranged and perpendicular to the first linear guide rail. The upper fixing bar is slidably connected to the first linear guide rail and is fixedly connected to the upper fixing plate.

[0011] A first motor is disposed between the two first fixed seats. The output shaft of the first motor is parallel to the central shaft. A first lead screw is disposed on the upper fixed bar. The upper fixed bar is threadedly connected to the first lead screw, and the first lead screw is parallel to the first linear guide rail. The first motor drives the first lead screw to rotate through a gear set.

[0012] Preferably, the lower traction assembly includes:

[0013] The second linear guide rail is symmetrically arranged on the radial side of the central axis. The second linear guide rail is horizontally arranged and perpendicular to the central axis.

[0014] A lower fixing bar is provided at one end of the second linear guide rail near the central axis. The lower fixing bar is parallel to the central axis and slidably connected to the second linear guide rail. The lower fixing bar is connected to the lower end of the display screen.

[0015] A second motor is provided between the two second linear guides. The output shaft of the second motor is parallel to the central shaft. A second lead screw is provided on the lower fixed bar. The second lead screw is threadedly connected to the lower fixed bar and is parallel to the second linear guide. The second motor drives the second lead screw to rotate through a gear set.

[0016] Preferably, ball bearings are provided at both ends of the central shaft, and the ball bearings abut against the inner wall of the hinge.

[0017] Preferably, the hinge is configured as a track-type structure, that is, multiple support bars are equally spaced on the surface of the hinge near the central axis, the support bars are configured as isosceles trapezoids, and the length direction of the support bars is parallel to the central axis.

[0018] Preferably, a cleaning component is further provided on the side of the central shaft, the cleaning component comprising:

[0019] The mounting bracket is configured as a rectangular frame structure, and the plane on which the mounting bracket is located is parallel to the first linear guide rail. The two sides of the mounting bracket are horizontally slidably connected to the first fixed base through connecting rods.

[0020] A drive plate is provided inside the mounting bracket. The drive plate is slidably connected to the mounting bracket in the vertical direction. Multiple meshing columns are equally spaced in the horizontal direction on the side wall of the drive plate away from the central axis. The meshing columns are perpendicular to the drive plate.

[0021] The third lead screw is provided on the side of the drive plate away from the central axis. The first motor drives the third lead screw to rotate through the gear set. A drive wheel is provided at the end of the third lead screw near the drive plate. Multiple mating posts are provided at equal intervals along the circumferential direction on the drive wheel. The mating posts and meshing posts mesh and transmit power.

[0022] A cleaning brush is provided on the side wall of the drive plate near the central axis, and the direction of the cleaning brush bristles is perpendicular to the drive plate.

[0023] Preferably, the cleaning component further includes:

[0024] A swing shaft is rotatably disposed inside the drive plate. The swing shaft is horizontally disposed. A first swing rod is fixedly disposed at one end of the swing shaft near the inner wall of the mounting frame. The first swing rod is horizontally disposed and can swing around the swing shaft. A first slot is opened at one end of the first swing rod along the length direction. A first protrusion is disposed on the inner wall of the mounting frame. The first protrusion is slidably disposed in the first slot. The other end of the first swing rod is connected to the mounting frame through a tension spring.

[0025] The second swing arm is fixedly provided at the other end of the swing shaft. The third swing arm and the fourth swing arm are arranged in sequence above the second swing arm. The third swing arm and the fourth swing arm are rotatably connected to the drive plate. The two ends of the second swing arm are respectively hinged to the ends of the third swing arm and the fourth swing arm away from the cleaning brush through cranks. The other ends of the third swing arm and the fourth swing arm extend to the outside of the drive plate.

[0026] The cleaning brush has a collection box on its side. The collection box is slidably mounted on the drive plate in the horizontal direction. The cleaning brush is located between the collection box and the third and fourth swing arms. The third and fourth swing arms are respectively hinged to the collection box via cranks.

[0027] Preferably, the collection box has a collection cavity at one end facing the cleaning brush, and a scraper facing the cleaning brush is provided in the collection cavity, with cleaning teeth at the front end of the scraper.

[0028] This invention also provides a multi-axis linkage control method based on a flexible lifting screen, comprising the following steps:

[0029] Step 1: Lifting Drive. When the screen needs to be lifted and unfolded, the first motor starts and drives the first lead screw to rotate through the gear set. The threaded connection between the first lead screw and the upper fixed bar pushes the upper fixed bar to move upward, thereby driving the upper part of the display screen and the upper fixed plate to move upward together, completing the lifting drive of the display screen.

[0030] Step 2: Lowering and retracting. When the screen needs to be retracted, the second motor starts and drives the second lead screw to rotate through the gear set. When the second lead screw, which is set in the horizontal direction, rotates, it drives the lower fixed bar to move away from the central axis through the threaded connection between the two. This causes the display screen to lower and retract.

[0031] Preferably, the first motor and the second motor drive the display screen to rise or fall from the upper and lower ends respectively. When the first motor starts, the second motor stops driving, and vice versa.

[0032] The working principle and beneficial technical effects of this invention are as follows: When the flexible lifting screen is in use, the multi-axis linkage mechanism is activated. At this time, the display screen and the hinge bypass the central axis to form a lifting screen structure. The upper traction component and the lower traction component set at the upper and lower ends of the display screen are connected to the display screen and drive its movement. The upper traction component drives the display screen to rise and unfold, and the lower traction component drives the display screen to fall and retract. The dual-drive structure makes the unfolding and retraction process of the display screen smoother and avoids the problem of wrinkles on the display screen caused by insufficient traction at the lower end when the display screen falls and retracts, which affects its use.

[0033] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0034] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0035] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0036] Figure 1 This is a schematic diagram of a multi-coordinate linkage mechanism structure based on a flexible lifting screen in an embodiment of the present invention. Figure 1 ;

[0037] Figure 2 This is a schematic diagram of a multi-coordinate linkage mechanism structure based on a flexible lifting screen in an embodiment of the present invention. Figure 2 ;

[0038] Figure 3 for Figure 2 Enlarged diagram of part A in the middle;

[0039] Figure 4 This is a schematic diagram of the cleaning component structure in a multi-coordinate linkage mechanism based on a flexible lifting screen, as described in an embodiment of the present invention. Figure 1 ;

[0040] Figure 5 This is a schematic diagram of the cleaning component structure in a multi-coordinate linkage mechanism based on a flexible lifting screen, as described in an embodiment of the present invention. Figure 2 ;

[0041] Figure 6 This is a schematic diagram of the cleaning component structure in a multi-coordinate linkage mechanism based on a flexible lifting screen, as described in an embodiment of the present invention. Figure 3 ;

[0042] Figure 7 This is a schematic diagram of the cleaning component structure in a multi-coordinate linkage mechanism based on a flexible lifting screen, as described in an embodiment of the present invention. Figure 4 ;

[0043] Figure 8 This is a schematic diagram of the cleaning component structure in a multi-coordinate linkage mechanism based on a flexible lifting screen, as described in an embodiment of the present invention. Figure 5 .

[0044] The labels in the attached diagram are as follows: 1. Screen module; 11. Display screen; 12. Hinge; 13. Central shaft; 14. Ball bearing; 15. Support bar; 2. Encasing body; 3. Upper traction assembly; 31. Upper fixing plate; 32. First fixed base; 33. First linear guide rail; 34. Upper fixing bar; 35. First motor; 36. First lead screw; 4. Lower traction assembly; 41. Second linear guide rail; 42. Lower fixing bar; 43. Second motor; 44. Second lead screw 5. Cleaning components; 501. Mounting bracket; 502. Drive plate; 503. Engaging column; 504. Third lead screw; 505. Drive wheel; 506. Mating column; 507. Cleaning brush; 508. Swing shaft; 509. First swing arm; 510. First slot; 511. First protrusion; 512. Tension spring; 513. Second swing arm; 514. Third swing arm; 515. Fourth swing arm; 516. Collection box; 517. Collection chamber; 518. Scraper. Detailed Implementation

[0045] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0046] This invention provides a multi-axis linkage mechanism based on a flexible lifting screen, such as... Figure 1 and Figure 2 As shown, the device includes a screen module 1 and a covering body 2. The screen module 1 includes a display screen 11, a hinge 12, and a central axis 13. The display screen 11 is fitted to the hinge 12. The display screen 11 and the hinge 12 are wrapped around the outside of the central axis 13 and are fitted to the central axis 13. The covering body 2 is made of a flexible material and covers the outside of the screen module 1. The device also includes an upper traction component 3 and a lower traction component 4. The upper traction component 3 is connected to the upper end of the display screen 11 to drive the upper end of the display screen 11 to move. The lower traction component 4 is connected to the lower end of the display screen 11 to drive its movement.

[0047] The working principle and beneficial technical effects of the above technical solution are as follows: When the flexible lifting screen is in use, the multi-axis linkage mechanism is activated. At this time, the display screen 11 and the hinge 12 bypass the central axis 13 to form a lifting screen structure. The upper traction component 3 and the lower traction component 4 set at the upper and lower ends of the display screen 11 are connected to the display screen 11 and drive its movement. The upper traction component 3 drives the display screen 11 to rise and unfold, and the lower traction component 4 drives the display screen 11 to fall and retract. The dual-drive structure makes the unfolding and retraction process of the display screen 11 smoother and avoids the problem of wrinkles on the display screen 11 caused by insufficient traction at the lower end when the display screen 11 falls and retracts, which affects its use.

[0048] In one embodiment, such as Figure 2 and Figure 3 As shown, the upper traction assembly 3 includes:

[0049] Upper fixing plate 31, the upper end of the display screen 11 is connected to the upper fixing plate 31, and the upper fixing plate 31 is disposed on the upper extension surface of the display screen 11;

[0050] The first fixed base 32 is provided obliquely above the inner central axis 13 of the hinge 12. The two first fixed bases 32 are symmetrically arranged along the central axis 13. The first fixed base 32 is provided with a first linear guide rail 33, which is obliquely upward and parallel to the hinge 12.

[0051] Upper fixing bar 34: The upper end of the first linear guide rail 33 is provided with an upper fixing bar 34. The upper fixing bar 34 is horizontally arranged and perpendicular to the first linear guide rail 33. The upper fixing bar 34 is slidably connected to the first linear guide rail 33 and is fixedly connected to the upper fixing plate 31.

[0052] A first motor 35 is disposed between the two first fixed seats. The output shaft of the first motor 35 is parallel to the central shaft 13. A first lead screw 36 is disposed on the upper fixed bar 34. The upper fixed bar 34 is threadedly connected to the first lead screw 36, and the first lead screw 36 is parallel to the first linear guide rail 33. The first motor 35 drives the first lead screw 36 to rotate through a gear set.

[0053] The lower traction component 4 includes:

[0054] The second linear guide 41 is symmetrically arranged on the radial side of the central shaft 13. The second linear guide 41 is horizontally arranged and perpendicular to the central shaft 13.

[0055] The lower fixing bar 42 is provided at one end of the second linear guide rail 41 near the central axis 13. The lower fixing bar 42 is parallel to the central axis 13 and is slidably connected to the second linear guide rail 41. The lower fixing bar 42 is connected to the lower end of the display screen 11.

[0056] A second motor 43 is disposed between the two second linear guide rails 41. The output shaft of the second motor 43 is parallel to the central shaft 13. A second lead screw 44 is disposed on the lower fixing bar 42. The second lead screw 44 is threadedly connected to the lower fixing bar 42 and is parallel to the second linear guide rail 41. The second motor 43 drives the second lead screw 44 to rotate through a gear set.

[0057] The working principle and beneficial technical effects of the above technical solution are as follows: When the flexible lifting screen rises and unfolds, the first motor 35 starts and drives the first lead screw 36 to rotate through the gear set. In specific use, a gearbox is provided outside the first motor 35 and the gear set. The gearbox can protect the motor and gear set on the one hand, and can also facilitate the fixation of the first lead screw 36 and other components on the other hand. When the first lead screw 36 rotates, since the first lead screw 36 is threadedly connected to the upper fixing bar 34, and the upper fixing bar 34 can only slide along the first linear guide rail 33, the first lead screw 36 drives the upper fixing bar 34 to move upward, which in turn drives the upper end of the display screen 11 to move upward through the upper fixing plate 31 to complete the lifting and unfolding process.

[0058] When the flexible lifting screen needs to descend and retract, the first motor 35 shuts off, and the second motor 43 starts, driving the second lead screw 44 to rotate via a gear set. The second lead screw 44 then drives the lower fixing bar 42 to move horizontally away from the central axis 13 in the same way, thereby causing the display screen 11 to descend and retract. This separate driving configuration of the first motor 35 and the second motor 43 avoids the problem of wrinkles on the display screen 11 caused by insufficient traction at the lower end during the retraction and descent process, which would affect its usability. Simultaneously, when the first motor 35 is in use, the second motor 43 stops driving, acting as a damper, making the unfolding process of the display screen 11 more stable and smooth.

[0059] In one embodiment, ball bearings 14 are provided at both ends of the central shaft 13, and the ball bearings 14 abut against the inner wall of the hinge 12.

[0060] The working principle and beneficial technical effects of the above technical solution: By setting ball bearings 14 at both ends of the central shaft 13, the bending of the screen is smoother and without creases. Users can choose silent bearings to further reduce the noise impact of the hinge 12 structure during use.

[0061] In one embodiment, the hinge 12 is configured as a track-type structure, that is, multiple support bars 15 are equally spaced on the surface of the hinge 12 near the central axis 13, the support bars 15 are configured as isosceles trapezoids, and the length direction of the support bars 15 is parallel to the central axis 13.

[0062] The working principle and beneficial technical effects of the above technical solution are as follows: By setting the track-type hinge 12 structure and the isosceles trapezoidal support bar 15, the hinge 12 can provide more uniform and stable support for the display screen 11, and the deformation caused by bending can also be eliminated.

[0063] In one embodiment, such as Figure 4-8 As shown, a cleaning component 5 is also provided on the side of the central shaft 13, the cleaning component 5 including:

[0064] Mounting bracket 501 is configured as a rectangular frame structure, and the plane on which the mounting bracket 501 is located is parallel to the first linear guide rail 33. The two sides of the mounting bracket 501 are horizontally slidably connected to the first fixed base 32 through connecting rods.

[0065] A drive plate 502 is provided inside the mounting bracket 501. The drive plate 502 is slidably connected to the mounting bracket 501 in the vertical direction. Multiple meshing posts 503 are equally spaced in the horizontal direction on the side wall of the drive plate 502 away from the central axis 13. The meshing posts 503 are perpendicular to the drive plate 502.

[0066] The third lead screw 504 is provided on the side of the drive plate 502 away from the central shaft 13. The first motor 35 drives the third lead screw 504 to rotate through the gear set. The end of the third lead screw 504 near the drive plate 502 is provided with a drive wheel 505. The drive wheel 505 is provided with a plurality of mating posts 506 at equal intervals along the circumferential direction. The mating posts 506 and the meshing posts 503 mesh and transmit power.

[0067] A cleaning brush 507 is provided on the side wall of the drive plate 502 near the central shaft 13, and the direction of the bristles of the cleaning brush 507 is perpendicular to the drive plate 502.

[0068] The cleaning component 5 also includes:

[0069] A swing shaft 508 is rotatably disposed within the drive plate 502. The swing shaft 508 is horizontally disposed. A first swing rod 509 is fixedly disposed at one end of the swing shaft 508 near the inner wall of the mounting bracket 501. The first swing rod 509 is horizontally disposed and can swing about the swing shaft 508 as the center. A first slot 510 is opened at one end of the first swing rod 509 along the length direction. A first protrusion 511 is disposed on the inner wall of the mounting bracket 501. The first protrusion 511 is slidably disposed in the first slot 510. The other end of the first swing rod 509 is connected to the mounting bracket 501 through a tension spring 512.

[0070] The second swing arm 513 is fixedly provided at the other end of the swing shaft 508. The third swing arm 514 and the fourth swing arm 515 are arranged sequentially above the second swing arm 513. The third swing arm 514 and the fourth swing arm 515 are rotatably connected to the drive plate 502 respectively. The two ends of the second swing arm 513 are respectively hinged to the ends of the third swing arm 514 and the fourth swing arm 515 away from the cleaning brush 507 through cranks. The other ends of the third swing arm 514 and the fourth swing arm 515 extend to the outside of the drive plate 502.

[0071] Collection box 516, the cleaning brush 507 is provided with a collection box 516 on its side, the collection box 516 is slidably disposed on the drive plate 502 in the horizontal direction, the cleaning brush 507 is located between the collection box 516 and the third swing arm 514 and the fourth swing arm 515, the third swing arm 514 and the fourth swing arm 515 are respectively hinged to the collection box 516 by a crank;

[0072] The collection box 516 has a collection cavity 517 at one end facing the cleaning brush 507. A scraper 518 facing the cleaning brush 507 is provided in the collection cavity 517, and the front end of the scraper 518 is provided with cleaning teeth.

[0073] The working principle and beneficial technical effects of the above technical solution are as follows: Since the hinge 12 is set as a track-type structure, there are gaps between the support bars 15 on the hinge 12. During long-term use, dust may accumulate at the hinge 12. The dust accumulation will cause obstruction between adjacent support bars 15 when bending, thus affecting the bending. At this time, the cleaning component 5 is activated. The first motor 35 rotates while driving the third lead screw 504 to rotate through the gear set, which in turn drives the drive wheel 505 at the front end of the third lead screw 504 to rotate. At this time, since the mating column 506 and the meshing column 503 are meshed and transmitted, the rotation of the drive wheel 505 will push the meshing column 503 and the drive plate 502 to move in the horizontal direction, thereby driving the mounting bracket 501 to move in the horizontal direction. The cleaning brush 507 on the other side of the moving plate 502 moves horizontally with the drive plate 502 to brush out the dust in the gap of the hinge 12. When the drive plate 502 moves horizontally and the end engagement post 503 engages with the mating post 506, the drive wheel 505 moves circumferentially along the end engagement post 503 under the action of the drive wheel 505 and the mating post 506, thereby pushing the drive plate 502 to slide upward relative to the mounting bracket 501. Then the drive wheel 505 continues to engage with the engagement post 503 from below. At this time, the drive plate 502 moves in the opposite horizontal direction under the action of the drive wheel 505 to complete the reset. Through the above settings, the repeated horizontal movement of the cleaning brush 507 completes the cleaning of the hinge 12, avoiding the accumulation of dust from affecting the use of the hinge 12.

[0074] Furthermore, each time the drive plate 502 moves to the horizontal end position, under the action of the drive wheel 505, the drive plate 502 will move vertically relative to the mounting bracket 501 to complete the reset. When the drive plate 502 moves vertically relative to the mounting bracket 501, the first protrusion 511 and the first slot 510 drive the first rocker arm 509 to rotate around the swing shaft 508, thereby driving the swing shaft 508 to rotate. When the swing shaft 508 rotates, it drives the second rocker arm 513 at the other end to rotate. When the swing shaft 508 rotates clockwise, the right side of the second rocker arm 513 moves downward and the left side moves upward, thereby driving the left ends of the third rocker arm 514 and the fourth rocker arm 515 to move through the crank. At this time, the third rocker arm 514 and the fourth rocker arm 515 form a lever structure. 4. The right side moves upward, and the right side of the fourth swing arm 515 moves downward. That is, the right ends of the third swing arm 514 and the fourth swing arm 515 approach each other. When the right ends of the third swing arm 514 and the fourth swing arm 515 approach each other, the third swing arm 514 and the fourth swing arm 515 will push the collection box 516 to move horizontally away from the cleaning brush 507 through the crank. Conversely, when the third swing arm 514 and the fourth swing arm 515 approach each other, the crank will drive the collection box 516 to approach the cleaning brush 507 until the collection box 516 passes through the cleaning brush 507. During the process of the collection box 516 passing through the cleaning brush 507, the cleaning teeth at the front end of the scraper 518 will act like a comb, thereby cleaning out the dust and other debris adhering to the cleaning brush 507 and leaving it in the collection box 516 to avoid affecting the use of the cleaning brush 507.

[0075] This invention also provides a multi-coordinate linkage control method based on a flexible lifting screen, comprising the following steps:

[0076] Step 1: Lifting Drive. When the screen needs to be lifted and unfolded, the first motor 35 starts and drives the first lead screw 36 to rotate through the gear set. The threaded connection between the first lead screw 36 and the upper fixing bar 34 pushes the upper fixing bar 34 to move upward, thereby driving the upper end of the display screen 11 and the upper fixing plate 31 to move upward together, thus completing the lifting drive of the display screen 11.

[0077] Step 2: Lowering and retracting. When the screen needs to be retracted, the second motor 43 starts and drives the second lead screw 44 to rotate through the gear set. When the second lead screw 44, which is set in the horizontal direction, rotates, it drives the lower fixed bar 42 to move away from the central axis 13 through the threaded connection between the second lead screw 44 and the lower fixed bar 42, thereby driving the display screen 11 to lower and retract.

[0078] The working principle and beneficial technical effects of the above technical solution are as follows: When the flexible lifting screen is in use, the multi-axis linkage mechanism is activated. At this time, the display screen 11 and the hinge 12 bypass the central axis 13 to form a lifting screen structure. The upper traction component 3 and the lower traction component 4 set at the upper and lower ends of the display screen 11 are connected to the display screen 11 and drive its movement. The upper traction component 3 drives the display screen 11 to rise and unfold, and the lower traction component 4 drives the display screen 11 to fall and retract. The dual-drive structure makes the unfolding and retraction process of the display screen 11 smoother and avoids the problem of wrinkles on the display screen 11 caused by insufficient traction at the lower end when the display screen 11 falls and retracts, which affects its use.

[0079] In one embodiment, the first motor 35 and the second motor 43 drive the display screen 11 to rise or fall from the upper and lower ends, respectively. When the first motor 35 is started, the second motor 43 stops driving, and vice versa.

[0080] The working principle and beneficial technical effects of the above technical solution are as follows: When the first motor 35 is in use, the second motor 43 stops driving. At this time, the second motor 43 plays a role similar to damping. Conversely, when the second motor 43 is in use, the first motor 35 self-locks, making the unfolding process of the display screen 11 more stable and smooth.

[0081] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A multi-axis linkage mechanism based on a flexible lifting screen, comprising a screen module (1) and a covering body (2), wherein the screen module (1) comprises a display screen (11), a hinge (12), and a central axis (13), the display screen (11) is fitted to the hinge (12), the display screen (11) and the hinge (12) are arranged around the outside of the central axis (13) and fitted to the central axis (13), and the covering body (2) is made of a flexible material and covers the outside of the screen module (1), characterized in that, It also includes an upper traction component (3) and a lower traction component (4). The upper traction component (3) is connected to the upper end of the display screen (11) to drive the upper end of the display screen (11) to move. The lower traction component (4) is connected to the lower end of the display screen (11) to drive it to move. The hinge (12) is configured as a track-type structure, that is, multiple support bars (15) are equally spaced on the surface of the hinge (12) near the central axis (13). The support bars (15) are configured as isosceles trapezoidal structures, and the length direction of the support bars (15) is parallel to the central axis (13). The upper traction assembly (3) includes: The first fixed base (32) is provided obliquely above the inner central axis (13) of the hinge (12). The two first fixed bases (32) are symmetrically arranged along the central axis (13), and the first fixed base (32) is provided with a first linear guide rail (33). The first linear guide rail (33) is obliquely upward and parallel to the hinge (12). A first motor (35) is provided between two first fixed bases (32), and the output shaft of the first motor (35) is parallel to the central axis (13). A cleaning component (5) is also provided on the side of the central shaft (13), the cleaning component (5) comprising: Mounting bracket (501) is configured as a rectangular frame structure, and the plane of mounting bracket (501) is parallel to the first linear guide rail (33). The two sides of mounting bracket (501) are horizontally slidably connected to the first fixed base (32) through connecting rods. A drive plate (502) is provided inside the mounting bracket (501). The drive plate (502) and the mounting bracket (501) are slidably connected in the vertical direction. Multiple meshing columns (503) are provided at equal intervals in the horizontal direction on the side wall of the drive plate (502) away from the central axis (13). The meshing columns (503) are perpendicular to the drive plate (502). The third lead screw (504) is provided on the side of the drive plate (502) away from the central shaft (13). The first motor (35) drives the third lead screw (504) to rotate through the gear set. A drive wheel (505) is provided at one end of the third lead screw (504) near the drive plate (502). The drive wheel (505) is provided with a plurality of mating pins (506) at equal intervals along the circumferential direction. The mating pins (506) mesh with the meshing pins (503) for transmission. A cleaning brush (507) is provided on the side wall of the drive plate (502) near the central shaft (13), and the direction of the bristles of the cleaning brush (507) is perpendicular to the drive plate (502). A swing shaft (508) is rotatably disposed inside the drive plate (502). The swing shaft (508) is horizontally disposed. A first swing rod (509) is fixedly disposed at one end of the swing shaft (508) near the inner wall of the mounting bracket (501). The first swing rod (509) is horizontally disposed and can swing around the swing shaft (508) as the center. A first slot (510) is opened at one end of the first swing rod (509) along the length direction. A first protrusion (511) is disposed on the inner wall of the mounting bracket (501). The first protrusion (511) is slidably disposed in the first slot (510). The other end of the first swing rod (509) is connected to the mounting bracket (501) through a tension spring (512). The second swing arm (513) is fixedly provided at the other end of the swing shaft (508). A third swing arm (514) and a fourth swing arm (515) are arranged sequentially above the second swing arm (513). The third swing arm (514) and the fourth swing arm (515) are rotatably connected to the drive plate (502). The two ends of the second swing arm (513) are respectively hinged to the ends of the third swing arm (514) and the fourth swing arm (515) away from the cleaning brush (507) through cranks. The other ends of the third swing arm (514) and the fourth swing arm (515) extend to the outside of the drive plate (502). A collection box (516) is provided on the side of the cleaning brush (507). The collection box (516) is slidably disposed on the drive plate (502) in the horizontal direction. The cleaning brush (507) is located between the collection box (516) and the third swing arm (514) and the fourth swing arm (515). The third swing arm (514) and the fourth swing arm (515) are respectively hinged to the collection box (516) through cranks. The collection box (516) has a collection cavity (517) at one end facing the cleaning brush (507). A scraper (518) facing the cleaning brush (507) is provided in the collection cavity (517), and the front end of the scraper (518) is provided with cleaning teeth.

2. The multi-axis linkage mechanism based on a flexible lifting screen according to claim 1, characterized in that, The upper traction assembly (3) also includes: Upper fixing plate (31), the upper end of the display screen (11) is connected to the upper fixing plate (31), the upper fixing plate (31) is disposed on the upper extension surface of the display screen (11); Upper fixing bar (34): The upper end of the first linear guide rail (33) is provided with an upper fixing bar (34). The upper fixing bar (34) is horizontally arranged and perpendicular to the first linear guide rail (33). The upper fixing bar (34) is slidably connected to the first linear guide rail (33), and the upper fixing bar (34) is fixedly connected to the upper fixing plate (31). The first lead screw (36) is provided on the upper fixing bar (34). The upper fixing bar (34) is threadedly connected to the first lead screw (36), and the first lead screw (36) is parallel to the first linear guide rail (33). The first motor (35) drives the first lead screw (36) to rotate through the gear set.

3. The multi-axis linkage mechanism based on a flexible lifting screen according to claim 1, characterized in that, The lower traction assembly (4) includes: The second linear guide (41) is symmetrically arranged on the radial side of the central shaft (13). The second linear guide (41) is arranged horizontally and perpendicular to the central shaft (13). The lower fixing bar (42) is provided at one end of the second linear guide rail (41) near the central axis (13). The lower fixing bar (42) is parallel to the central axis (13) and is slidably connected to the second linear guide rail (41). The lower fixing bar (42) is connected to the lower end of the display screen (11). A second motor (43) is provided between the two second linear guides (41). The output shaft of the second motor (43) is parallel to the central shaft (13). A second lead screw (44) is provided on the lower fixing bar (42). The second lead screw (44) is threadedly connected to the lower fixing bar (42) and is parallel to the second linear guide (41). The second motor (43) drives the second lead screw (44) to rotate through a gear set.

4. The multi-axis linkage mechanism based on a flexible lifting screen according to claim 1, characterized in that, The central shaft (13) is provided with ball bearings (14) at both ends, and the ball bearings (14) abut against the inner wall of the hinge (12).

5. A multi-axis linkage control method based on a flexible lifting screen, applicable to a multi-axis linkage mechanism based on a flexible lifting screen as described in any one of claims 2-4, characterized in that, Includes the following steps: Step 1: Lifting drive. When the screen needs to be lifted and unfolded, the first motor (35) starts and drives the first lead screw (36) to rotate through the gear set. The threaded connection between the first lead screw (36) and the upper fixing bar (34) pushes the upper fixing bar (34) to move upward, thereby driving the upper end of the display screen (11) and the upper fixing plate (31) to move upward together, thus completing the lifting drive of the display screen (11). Step 2: Lowering and retracting. When the screen needs to be retracted, the second motor (43) starts and drives the second lead screw (44) to rotate through the gear set. When the second lead screw (44) is set in the horizontal direction, it drives the lower fixed bar (42) to move away from the central axis (13) through the threaded connection between the second lead screw (44) and the lower fixed bar (42), thereby driving the display screen (11) to lower and retract.

6. The multi-axis linkage control method based on a flexible lifting screen according to claim 5, characterized in that, The first motor (35) and the second motor (43) drive the display screen (11) to rise or fall from the top and bottom ends respectively. When the first motor (35) starts, the second motor (43) stops driving. Conversely, when the second motor (43) starts, the first motor (35) stops driving.

Images