Smoothing device of flexible display screen

Abstract

The invention relates to the technical field of flexible screens, in particular to a flattening device for a flexible display screen, a fixing mechanism comprises a fixing base and a rack, a plurality of sets of adsorption holes are formed in the fixing base, the single sets of adsorption holes are distributed in the width direction of the flexible display screen and communicate with one another through ventilation pipelines, and the ventilation pipelines communicate with one another through negative pressure pipelines; valve group mechanisms are arranged at the joints, and the negative pressure pipeline is externally connected with a negative pressure pump; the smoothing mechanism comprises a moving frame and a smoothing roller, the moving frame moves in the length direction of the fixed base, sliding grooves are formed in the two sides of the fixed base, and driving mechanisms used for driving the moving frame to move are installed in the sliding grooves; the smoothing roller is installed on the installation support, and the top of the installation support is connected with the movable frame through a lifting air cylinder. The feeding and discharging mechanism comprises manipulators at the two ends, and the output ends of the manipulators adsorb the flexible display screens through electric suction cups. The adsorption efficiency and flexibility are improved, the smoothing quality is further improved, and errors and damage risks caused by manual operation are reduced.

Description

Technical Field

[0001] This application relates to the technical field of flexible screen, and particularly to a flattening device for a flexible display screen. Background Art

[0002] In the LCD and OLED panel industries, during the production process, since the screen is flexible and soft in texture, it is prone to deformation and needs to be flattened. Currently, there are mainly two ways to flatten it. One is by manual flattening, which has low efficiency, low product quality, and is prone to causing product contamination. The other is by rolling, but the traditional rolling method cannot control the pressure, which is likely to cause uneven stress on the screen and damage it, resulting in losses.

[0003] Chinese Patent CN115275082A discloses an automatic flattening device for a flexible OLED display screen, including a base. Above the base, there is a cross plate, and on one side of the cross plate, there is a flattening structure. The flattening structure includes a first motor, a housing, a vertical block, an electric push rod, a threaded rod, a first sliding rod, and a circular roller. The bottom of the housing is fixedly connected to the top of one side of the cross plate, and one end inner wall of the housing is rotatably connected to the threaded rod through a bearing. For this automatic flattening device for a flexible OLED display screen, through the cooperation of the box body, wide plate, cross plate, second sliding rod, base, slider, baffle, and flattening structure, the electric push rod drives the circular roller to move downward, making the circular roller fit with the flexible screen. The first motor drives the threaded rod to rotate, the threaded rod drives the vertical block to move to the right, and the vertical block drives the electric push rod to move to the right, so that the circular roller rolls on the top of the flexible screen, automatically flattening the flexible screen, with high automation and labor saving.

[0004] However, when placing the flexible screen on the fixing mechanism at the bottom of the flattening mechanism, since the screen is bent in its natural state, after being adsorbed by the fixing mechanism and then flattened by the flattening mechanism, the flexible screen is likely to slide relative to the surface of the fixing mechanism, and it is easy to cause wear of the flexible screen during the sliding process. Moreover, when the warping deformation amount on the flexible circuit board is relatively large, direct downward pressing is likely to cause folding damage to the flexible circuit board. Summary of the Invention

[0005] In order to overcome [the above problems], this application provides a flattening device for a flexible display screen.

[0006] A flattening device for a flexible display screen provided by this application adopts the following technical solutions:

[0007] A flattening device for a flexible display screen includes

[0008] A fixing mechanism for adsorbing a flexible display screen, comprising a fixing base and a frame for mounting the fixing base. A number of groups of adsorption holes are evenly formed in the fixing base. Among them, a single group of adsorption holes is distributed along the width direction of the flexible display screen, and the single group of adsorption holes is communicated through a ventilation pipe. The ventilation pipes are communicated through a negative pressure pipe. Valve group mechanisms are provided at the joints, and a negative pressure pump is externally connected to the negative pressure pipe;

[0009] A flattening mechanism for flattening the flexible display screen on the fixing mechanism, comprising a moving frame slidably mounted on the fixing base and a flattening roller on the moving frame. The moving frame moves along the length direction of the fixing base. Among them, sliding grooves adapted to the bottom of the moving frame are formed on both sides of the fixing base, and a driving mechanism for driving the moving frame to move is installed in the sliding grooves; The flattening roller is installed on the mounting bracket. The top of the mounting bracket is connected to the moving frame through a lifting cylinder, and a flatness monitoring mechanism is further provided between the output end of the lifting cylinder and the mounting bracket;

[0010] A loading and unloading mechanism for loading and unloading the flexible display screen on the fixing base, comprising a manipulator at both ends of the fixing base in the length direction, and the output end of the manipulator adsorbs the flexible display screen through an electric suction cup.

[0011] By adopting the above technical solution, when the flattening device of the flexible display screen works, first move the moving frame on the fixed base to move from the loading end and cross the first group of adsorption holes at the feeding end. During the movement, the movement of the rack inside the moving frame drives the adjustment gear to rotate, thereby opening the valve group mechanism, and the negative pressure pipeline is communicated with the ventilation pipeline at the bottom of the first group of adsorption holes. At this time, the valve group mechanisms between the ventilation pipelines at the bottoms of other groups of adsorption holes and the negative pressure pipeline are all closed. Start the negative pressure pump, and the negative pressure pump is communicated with a group of adsorption holes at the feeding end of the fixed base through the negative pressure pipeline, and the flexible display screen to be flattened is preliminarily positioned and fixed through this group of adsorption holes. Then, the flattening mechanism starts to work. The driving mechanism drives the moving frame to move along the length direction of the fixed base from the loading end to the unloading end in the sliding grooves on both sides of the fixed base. During the movement, the moving frame will sequentially open the valve group mechanisms at the ends of multiple groups of adsorption holes through the rack inside. The lifting cylinder on the moving frame drives the mounting bracket and the flattening roller to descend. The flatness monitoring mechanism monitors the contact situation between the flattening roller and the flexible display screen in real time to ensure the flattening effect. The flattening roller performs a flattening operation on the flexible display screen adsorbed on the fixed base. The flexible display screen flattened by the flattening roller will be adsorbed and fixed by the adsorption holes on the fixed base that are opened as the moving frame moves, so as to realize the adsorption and fixation of the flexible display screen while the flattening roller on the moving frame flattens it. The loading and unloading mechanism adsorbs the flexible display screen through the electric suction cups of the manipulators at both ends of the fixed base in the length direction. During the feeding process of the flexible display screen, the manipulator at the loading end adsorbs and places the flexible display screen on the fixed base and adsorbs and fixes it through a group of adsorption holes at the end. After the flexible display screen is flattened, the moving frame returns to the loading end of the fixed base under the action of the driving mechanism, releases the adsorption of the adsorption holes on the flexible display screen, and then the manipulator at the unloading end sucks away the flattened flexible display module through the suction cup. The whole process realizes the efficient adsorption, flattening and loading and unloading operations of the flexible display screen.

[0012] Preferably, the valve group mechanism includes a valve core mechanism located between the ventilation pipeline and the negative pressure pipeline. The valve core mechanism includes two horizontally distributed sealing plates. The sealing plates are located in the ventilation pipeline, and sealing rings are arranged around the sealing plates and are hermetically connected to the ventilation pipeline. The sealing plates are connected by a central shaft, and the extending end of the central shaft penetrates through the end of the ventilation pipeline. The distance between the sealing plates is greater than the inner diameter of the negative pressure pipeline. The central shaft is threadedly connected to the end of the ventilation pipeline, and an adjustment gear coaxial with the central shaft is installed at the end of the ventilation pipeline where the central shaft is located.

[0013] Preferably, the sealing plates move between the two ends of the interface between the ventilation pipeline and the negative pressure pipeline and the end of the ventilation pipeline. A rack with the tooth surface facing down is installed on the inner side surface of the moving frame, and the rack meshes with the adjustment gear for transmission.

[0014] By adopting the above technical solution, during the operation of the flexible display flattening device, when the moving frame of the flattening mechanism moves from the loading end to the unloading end along the length direction on the fixed base, the rack on the inner side of the moving frame moves accordingly. Since the rack meshes with the adjusting gear of the valve core mechanism in the valve group mechanism, the adjusting gear will rotate as the rack moves. The adjusting gear is installed at the end of the central shaft located in the ventilation pipe and is coaxial with the central shaft. The central shaft is threadedly connected to the end of the ventilation pipe. Therefore, the rotation of the adjusting gear will drive the central shaft to rotate, and further cause the central shaft to move linearly along the end of the ventilation pipe. The central shaft is connected to two sets of sealing plates horizontally distributed in the ventilation pipe. When the central shaft moves, the sealing plates also move accordingly, and the sealing rings around the sealing plates ensure their sealed connection with the ventilation pipe. The sealing plates move between the two ends of the interface between the ventilation pipe and the negative pressure pipe and the end of the ventilation pipe. Since the distance between the sealing plates is greater than the inner diameter of the negative pressure pipe, the on-off between the ventilation pipe and the negative pressure pipe can be switched during the movement, so as to cooperate with the adsorption and fixation operation of the flexible display, enabling the device to more accurately and effectively adsorb and flatten the flexible display.

[0015] Preferably, the driving mechanism includes a servo motor located at the end of the chute. The lead screw fixedly installed on the output shaft of the servo motor is adapted to the lead screw sleeve at the bottom of the moving frame. And a bearing seat rotatably connected to the lead screw is installed at one end of the chute away from the servo motor. The moving block integrally formed at the bottom of the moving frame cooperates with the chute to move. The width of the two side frames of the moving frame is greater than the width of the moving block, and the length of the moving frame is less than the length of the moving block.

[0016] By adopting the above technical solution, the driving mechanism is responsible for driving the moving frame to move along the length direction of the fixed base. During operation, the servo motor located at the end of the chute is started, and its output shaft drives the lead screw fixedly installed thereon to rotate synchronously. The lead screw sleeve at the bottom of the moving frame is adapted to the lead screw. When the lead screw rotates, the lead screw sleeve will move linearly along the lead screw, thereby driving the moving frame to move. The moving block integrally formed at the bottom of the moving frame moves in cooperation with the chute to ensure the stability of the moving frame during movement. At the same time, the width of the two side frames of the moving frame is greater than the width of the moving block, and the length is less than the length of the moving block. This structural design ensures that while the moving frame bears components such as flattening rollers, it will not affect the smooth movement of the moving block in the chute, enabling the servo motor to accurately and stably drive the moving frame to move back and forth on the fixed base through the cooperation of the lead screw and the lead screw sleeve, providing stable power support for the flattening operation of the flattening mechanism on the flexible display.

[0017] Preferably, the mounting bracket adopts an inverted U-shaped structure. The top of the mounting bracket is rotatably connected to the output end of the lifting cylinder through a rotating part. And the flatness monitoring mechanism at the connection includes two sets of telescopic parts located on the top end face of the mounting bracket. The telescopic parts are symmetrically installed on both sides of the rotating part and are respectively rotatably connected to the mounting bracket and the output end of the lifting cylinder.

[0018] Preferably, the rotating part includes a rotating groove opened at the bottom of the lifting cylinder, and a rotating protrusion rotatably connected to the rotating groove is integrally formed at the top center of the mounting bracket, wherein the mounting bracket rotates in the rotating groove along the width direction of the fixed base, and an angle sensor is installed between the rotating protrusion and the rotating groove.

[0019] Preferably, the telescopic member comprises a telescopic cavity and a telescopic rod, wherein the telescopic rod is slidably installed in the telescopic cavity, and the diameter of the opening end of the telescopic cavity is smaller than the inner diameter of the telescopic cavity body, and a limiting plate for limiting the telescopic rod in the telescopic cavity is fixed to the end of the telescopic rod, wherein a displacement sensor is installed at one end of the telescopic cavity away from the telescopic rod,

[0020] By adopting the above technical solution, when the lifting cylinder is started, its output end drives the mounting bracket to descend, preparing to smooth the flexible display screen. Since the mounting bracket adopts an inverted U-shaped structure, its top is rotatably connected to the output end of the lifting cylinder through a rotating part. In the rotating part, the rotating groove at the bottom of the lifting cylinder cooperates with the rotating protrusion integrally formed on the top of the mounting bracket, so that the mounting bracket can rotate in the rotating groove along the width direction of the fixed base. The telescopic parts are symmetrically installed on both sides of the top end surface of the mounting bracket, and the two ends are respectively rotatably connected to the mounting bracket and the output end of the lifting cylinder. The telescopic rod of the telescopic part slides in the telescopic cavity, the diameter of the opening end of the telescopic cavity is smaller than the inner diameter of the cavity, and the limit plate at the end of the telescopic rod prevents it from escaping from the telescopic cavity. When the mounting bracket descends and contacts the surface of the flexible display screen, if the surface is uneven, the mounting bracket will rotate through the rotating part due to uneven force, and the angle sensor can monitor the change of the rotation angle in real time. At the same time, the telescopic part will also expand and contract due to the rotation of the mounting bracket. The displacement sensor can accurately measure the displacement change of the telescopic rod in the telescopic cavity, thereby realizing all-round monitoring of the contact flatness between the mounting bracket and the flexible display screen, ensuring that the smoothing roller can evenly and stably smooth the flexible display screen and improve the smoothing effect.

[0021] Preferably, the smoothing roller adopts a segmented structure, including several groups of smoothing sections distributed along the middle axis of the smoothing roller, the smoothing sections include a floating support mechanism arrayed on the central axis, the floating support mechanism includes a supporting surface layer and a fixed layer, and the outer side surface of the supporting surface layer adopts an arc-shaped surface in contact with the flexible display screen, the fixed layer is fixedly connected to the central axis, and the fixed layer and the supporting surface layer are connected by an elastic buffer layer.

[0022] Preferably, the supporting surface is made of aluminum alloy or carbon fiber material, and an arc-shaped transition is adopted between the outer side surface of the supporting surface and the adjacent surface. Corresponding movable grooves and movable protrusions are adopted between the supporting surfaces between two adjacent smoothing sections, wherein the length direction of the movable grooves and movable protrusions passes through the axis center of the intermediate shaft.

[0023] Preferably, an infrared heating device is installed in the gap between the floating support mechanisms. The infrared heating device is distributed along the length direction of the flattening roller, and the cross-section of the infrared heating device adopts a horn-shaped structure.

[0024] By adopting the above technical solution, when the flattening roller with a segmented structure is working, when the moving frame drives the flattening roller to move along the length direction of the fixed base to flatten the flexible display screen, several groups of flattening segments on the flattening roller work together. Each group of flattening segments is composed of floating support mechanisms arrayed on the central axis. The fixed layer of the floating support mechanism is firmly connected to the central axis, and the support surface layer is connected to the fixed layer through an elastic buffer layer. Its outer surface adopts an arc surface in contact with the flexible display screen, and the support surface layer is made of aluminum alloy or carbon fiber material, with an arc transition between adjacent surfaces. This can effectively fit the surface of the flexible display screen, reduce damage and provide uniform support. Between two adjacent flattening segments, the support surface layers cooperate with each other through corresponding moving grooves and moving protrusions. The length directions of the moving grooves and moving protrusions pass through the axis of the intermediate shaft, enabling the flattening segments to flexibly adapt to different shapes of the flexible display screen. In the gap between the floating support mechanisms, an infrared heating device with a horn-shaped cross-section is distributed along the length direction of the flattening roller. During the flattening process, the infrared heating device is turned on, and the heat emitted can soften the flexible display screen, reduce its hardness, and cooperate with the physical flattening action of the flattening roller, enabling the flexible display screen to be flattened more efficiently and smoothly, improving the flattening quality and effect.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. With the coordinated operation of the adsorption holes, ventilation pipes, negative pressure pipes, and valve group mechanism, the fixing mechanism in the present application can stably and accurately adsorb and fix the flexible display screen, effectively preventing it from shifting or deviating during subsequent operations. At the same time, the linkage design of the valve group mechanism and the moving frame realizes the dynamic adjustment of the adsorption area, greatly improving the adsorption efficiency and flexibility;

[0027] 2. The driving, installation, and monitoring components of the flattening mechanism in the present application work together to ensure the accuracy and efficiency of the flattening operation. The driving mechanism uses the combination of a servo motor and a lead screw to achieve precise movement of the moving frame, ensuring that the flattening roller can accurately act on the display screen; the rotational connection between the mounting bracket and the lifting cylinder, combined with the flatness monitoring mechanism, enables the flattening roller to flexibly adapt to display screens with different flatnesses, ensuring good contact and flattening effect. The segmented structure and floating support mechanism of the flattening roller can not only closely fit the surface of the display screen but also buffer the pressure to avoid damage. Combined with the infrared heating device, the flattening quality is further improved.

[0028] 3. The loading and unloading mechanism of this application utilizes the manipulators and electric suction cups at both ends. Each component cooperates to quickly transport the screen by the manipulator, and the screen is adsorbed by the electric suction cup during the transportation process. It can automatically turn over the screen, and the vacuum suction cup can reliably adsorb and turn over the screen, realizing automatic loading and unloading, improving work efficiency, and reducing the errors and damage risks caused by manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall structure of a flattening device for a flexible display screen;

[0030] Figure 2 is an exploded view of the valve group mechanism in a flattening device for a flexible display screen;

[0031] Figure 3 is Figure 2 an enlarged view of part A in

[0032] Figure 4 is an exploded view of the floating support mechanism in a flattening device for a flexible display screen;

[0033] Figure 5 is Figure 4 an enlarged view of part B in

[0034] Figure 6 is a cross-sectional view of the telescopic member in a flattening device for a flexible display screen.

[0035] DESCRIPTION OF THE REFERENCE NUMERALS: 1. Fixed mechanism; 11. Fixed base; 12. Frame; 13. Suction holes; 14. Ventilation pipes; 15. Negative pressure pipes; 16. Negative pressure pump; 17. Chute; 2. Valve group mechanism; 21. Spool mechanism; 211. Sealing plate; 212. Sealing ring; 213. Central shaft; 214. Adjusting gear; 3. Flattening mechanism; 4. Moving frame; 41. Driving mechanism; 411. Servo motor; 412. Lead screw; 413. Bearing seat; 42. Rack; 43. Moving block; 5. Flattening roller; 51. Flattening section; 511. Floating support mechanism; 5111. Support surface layer; 5112. Fixed layer; 5113. Elastic buffer layer; 52. Moving groove; 53. Moving protrusion; 54. Infrared heating device; 6. Mounting bracket; 61. Lifting cylinder; 62. Rotating part; 621. Rotating groove; 622. Rotating protrusion; 7. Flatness monitoring mechanism; 71. Telescopic member; 711. Telescopic cavity; 712. Telescopic rod; 713. Limiting plate; 714. Displacement sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The following will further elaborate on this application in conjunction with the attached Figures 1-6 drawings.

[0037] The embodiment of this application discloses a flattening device for a flexible display screen.

[0038] Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6, A flattening device for a flexible display screen, comprising a fixing mechanism 1 for adsorbing the flexible display screen, including a fixing base 11 and a frame 12 for mounting the fixing base 11. A number of groups of adsorption holes 13 are evenly arranged on the fixing base 11. Among them, a single group of adsorption holes 13 is distributed along the width direction of the flexible display screen, and a single group of adsorption holes 13 is connected through a ventilation pipeline 14. The ventilation pipelines 14 are connected through a negative pressure pipeline 15. Valve group mechanisms 2 are provided at the connection points, and a negative pressure pump 16 is externally connected to the negative pressure pipeline 15; a flattening mechanism 3 for flattening the flexible display screen on the fixing mechanism 1, including a moving frame 4 slidably mounted on the fixing base 11 and a flattening roller 5 on the moving frame 4. The moving frame 4 moves along the length direction of the fixing base 11. Among them, sliding grooves 17 adapted to the bottom of the moving frame 4 are provided on both sides of the fixing base 11, and a driving mechanism 41 for driving the moving frame 4 to move is installed in the sliding grooves 17; the flattening roller 5 is installed on a mounting bracket 6, and the top of the mounting bracket 6 is connected to the moving frame 4 through a lifting cylinder 61. A flatness monitoring mechanism 7 is further provided between the output end of the lifting cylinder 61 and the mounting bracket 6; a loading and unloading mechanism for loading and unloading the flexible display screen on the fixing base 11, including mechanical hands at both ends of the fixing base 11 in the length direction, and the output ends of the mechanical hands adsorb the flexible display screen through electric suction cups. When the flattening device for the flexible display screen works, first move the moving frame 4 on the fixing base 11 to start moving from the loading end and cross the first group of adsorption holes 13 at the feeding end. During the movement, the movement of the inner rack 42 of the moving frame 4 drives the adjustment gear 214 to rotate, thereby opening the valve group mechanism 2. The negative pressure pipeline 15 is connected to the ventilation pipeline 14 at the bottom of the first group of adsorption holes 13. At this time, the valve group mechanisms 2 between the ventilation pipelines 14 at the bottoms of the other groups of adsorption holes 13 and the negative pressure pipeline 15 are all closed. Start the negative pressure pump 16. The negative pressure pump 16 is connected to a group of adsorption holes 13 at the feeding end of the fixing base 11 through the negative pressure pipeline 15, and the flexible display screen to be flattened is preliminarily positioned and fixed through this group of adsorption holes 13. Then, the flattening mechanism 3 starts to work. The driving mechanism 41 drives the moving frame 4 to move along the length direction of the fixing base 11 from the loading end to the unloading end in the sliding grooves 17 on both sides of the fixing base 11. During the movement, the moving frame 4 will sequentially open the valve group mechanisms 2 at the ends of multiple groups of adsorption holes 13 through the inner rack 42. The lifting cylinder 61 on the moving frame 4 drives the mounting bracket 6 and the flattening roller 5 to descend. The flatness monitoring mechanism 7 monitors the contact situation between the flattening roller 5 and the flexible display screen in real time to ensure the flattening effect. The flattening roller 5 performs a flattening operation on the flexible display screen adsorbed on the fixing base 11. The flexible display screen flattened by the flattening roller 5 will be adsorbed and fixed by the adsorption holes 13 on the fixing base 11 that are opened as the moving frame 4 moves, so as to realize the adsorption and fixation of the flexible display screen while the flattening roller 5 on the moving frame 4 flattens the flexible display screen.The manipulators at both ends of the fixed base 11 in the length direction of the loading and unloading mechanism adsorb the flexible display screen through electric suction cups. During the feeding process of the flexible display screen, the manipulator at the feeding end adsorbs and places the flexible display screen on the fixed base 11 and adsorbs and fixes it through a set of adsorption holes 13 at the end. After the flexible display screen is smoothed, the moving frame 4 returns to the feeding end of the fixed base 11 under the action of the driving mechanism 41, releases the adsorption of the adsorption holes 13 on the flexible display screen, and then the manipulator at the unloading end sucks away the smoothed flexible display module through the suction cup. The whole process realizes the efficient adsorption, smoothing, loading and unloading operations of the flexible display screen.

[0039] Refer to Figure 1 , Figure 2 and Figure 3, the valve group mechanism 2 includes a valve core mechanism 21 located between the ventilation pipeline 14 and the negative pressure pipeline 15. The valve core mechanism 21 includes two sets of horizontally distributed sealing plates 211. The sealing plates 211 are located in the ventilation pipeline 14, and sealing rings 212 for sealing connection with the ventilation pipeline 14 are arranged around the sealing plates 211. The sealing plates 211 are connected by a central shaft 213, and the extending end of the central shaft 213 penetrates through the end of the ventilation pipeline 14. The distance between the sealing plates 211 is greater than the inner diameter of the negative pressure pipeline 15. The central shaft 213 is threadedly connected to the end of the ventilation pipeline 14, and an adjusting gear 214 coaxial with the central shaft 213 is installed at the end of the central shaft 213 located in the ventilation pipeline 14. The sealing plates 211 move between the two ends of the interface between the ventilation pipeline 14 and the negative pressure pipeline 15 and the end of the ventilation pipeline 14. A rack 42 with a downward-facing tooth surface is installed on the inner side surface of the moving frame 4, and the rack 42 meshes with the adjusting gear 214 for transmission. During the operation of the flexible display flattening device, when the moving frame 4 of the flattening mechanism 3 moves along the length direction from the loading end to the unloading end on the fixed base 11, the rack 42 on the inner side surface of the moving frame 4 moves accordingly. Since the rack 42 meshes with the adjusting gear 214 of the valve core mechanism 21 in the valve group mechanism 2 for transmission, the adjusting gear 214 will rotate as the rack 42 moves. The adjusting gear 214 is installed at the end of the central shaft 213 located in the ventilation pipeline 14 and is coaxial with the central shaft 213. The central shaft 213 is threadedly connected to the end of the ventilation pipeline 14. Therefore, the rotation of the adjusting gear 214 will drive the central shaft 213 to rotate, and then the central shaft 213 will move linearly along the end of the ventilation pipeline 14. The central shaft 213 is connected to two sets of horizontally distributed sealing plates 211 in the ventilation pipeline 14. When the central shaft 213 moves, the sealing plates 211 also move accordingly, and the sealing rings 212 around the sealing plates 211 ensure their sealing connection with the ventilation pipe. The sealing plates 211 move between the two ends of the interface between the ventilation pipeline 14 and the negative pressure pipeline 15 and the end of the ventilation pipeline 14. Since the distance between the sealing plates 211 is greater than the inner diameter of the negative pressure pipeline 15, the on-off between the ventilation pipeline 14 and the negative pressure pipeline 15 can be switched during the movement, so as to cooperate with the adsorption and fixing operation of the flexible display, enabling the device to adsorb and flatten the flexible display more accurately and effectively.

[0040] Refer to Figure 1 , Figure 2 and Figure 3, the driving mechanism 41 includes a servo motor 411 located at the end of the chute 17. A lead screw 412 fixedly installed on the output shaft of the servo motor 411 is adapted to a nut sleeve at the bottom of the moving frame 4. And a bearing block 413 rotatably connected to the lead screw 412 is installed at one end of the chute 17 away from the servo motor 411. A moving block 43 integrally formed at the bottom of the moving frame 4 is engaged with the chute 17 for movement. The width of the side frames of the moving frame 4 is greater than the width of the moving block 43, and the length of the moving frame 4 is less than the length of the moving block 43. The driving mechanism 41 is responsible for driving the moving frame 4 to move along the length direction of the fixed base 11. During operation, the servo motor 411 located at the end of the chute 17 is started, and its output shaft drives the lead screw 412 fixedly installed thereon to rotate synchronously. The nut sleeve at the bottom of the moving frame 4 is adapted to the lead screw 412. When the lead screw 412 rotates, the nut sleeve will move linearly along the lead screw 412, thereby driving the moving frame 4 to move. The moving block 43 integrally formed at the bottom of the moving frame 4 moves in cooperation with the chute 17 to ensure the stability of the movement of the moving frame 4. At the same time, the width of the side frames of the moving frame 4 is greater than the width of the moving block 43, and the length is less than the length of the moving block 43. This structural design can ensure that the moving frame 4 can carry components such as the flattening roller 5 while not affecting the smooth movement of the moving block 43 in the chute 17, enabling the servo motor 411 to accurately and stably drive the moving frame 4 to move back and forth on the fixed base 11 through the cooperation of the lead screw 412 and the nut sleeve, providing stable power support for the flattening operation of the flexible display screen by the flattening mechanism 3.

[0041] Refer to Figure 1 , Figure 4 , Figure 5 and Figure 6The mounting bracket 6 adopts an inverted U-shaped structure, wherein the top of the mounting bracket 6 is rotatably connected to the output end of the lifting cylinder 61 through a rotating part 62, and the flatness monitoring mechanism 7 at the connection includes two sets of telescopic parts 71 located on the top end surface of the mounting bracket 6, and the telescopic parts 71 are symmetrically installed on both sides of the rotating part 62, and the two ends are respectively rotatably connected to the mounting bracket 6 and the output end of the lifting cylinder 61. The rotating part 62 includes a rotating groove 621 opened at the bottom of the lifting cylinder 61, and a rotating protrusion 622 rotatably connected to the rotating groove 621 is integrally formed at the center of the top of the mounting bracket 6, wherein the mounting bracket 6 rotates in the rotating groove 621 along the width direction of the fixed base 11, and an angle sensor is installed between the rotating protrusion 622 and the rotating groove 621. The telescopic member 71 includes a telescopic cavity 711 and a telescopic rod 712, wherein the telescopic rod 712 is slidably installed in the telescopic cavity 711, and the diameter of the open end of the telescopic cavity 711 is smaller than the inner diameter of the cavity of the telescopic cavity 711, and a limiting plate 713 for limiting it in the telescopic cavity 711 is fixed at the end of the telescopic rod 712, wherein a displacement sensor 714 is installed at one end of the telescopic cavity 711 away from the telescopic rod 712, and when the lifting cylinder 61 is started, its output end drives the mounting bracket 6 to descend, and is ready to perform a smoothing operation on the flexible display screen. Since the mounting bracket 6 adopts an inverted U-shaped structure, its top is rotatably connected to the output end of the lifting cylinder 61 through a rotating part 62. In the rotating part 62, the rotating groove 621 at the bottom of the lifting cylinder 61 cooperates with the rotating protrusion 622 integrally formed at the top of the mounting bracket 6, so that the mounting bracket 6 can rotate in the rotating groove 621 along the width direction of the fixed base 11. The telescopic member 71 is symmetrically installed on both sides of the top end surface of the mounting bracket 6, and its two ends are respectively rotatably connected to the mounting bracket 6 and the output end of the lifting cylinder 61. The telescopic rod 712 of the telescopic member 71 slides in the telescopic cavity 711. The diameter of the open end of the telescopic cavity 711 is smaller than the inner diameter of the cavity. The limit plate 713 at the end of the telescopic rod 712 prevents it from leaving the telescopic cavity 711. When the mounting bracket 6 descends and contacts the surface of the flexible display screen, if the surface is uneven, the mounting bracket 6 will rotate through the rotating part 62 due to uneven force, and the angle sensor can monitor the change of the rotation angle in real time. At the same time, the telescopic member 71 will also expand and contract due to the rotation of the mounting bracket 6. The displacement sensor 714 can accurately measure the displacement change of the telescopic rod 712 in the telescopic cavity 711, thereby realizing all-round monitoring of the contact flatness between the mounting bracket 6 and the flexible display screen, ensuring that the smoothing roller 5 can evenly and stably smooth the flexible display screen and improve the smoothing effect.

[0042] Reference Figure 1 , Figure 4 , Figure 5 and Figure 6, the flattening roller 5 adopts a segmented structure, including several groups of flattening segments 51 distributed along the middle axis of the flattening roller 5. The flattening segment 51 includes a floating support mechanism 511 arrayed on the central axis 213. The floating support mechanism 511 includes a support surface layer 5111 and a fixed layer 5112. The outer side surface of the support surface layer 5111 is an arc surface in contact with the flexible display screen. The fixed layer 5112 is fixedly connected to the central axis 213, and the fixed layer 5112 is connected to the support surface layer 5111 through an elastic buffer layer 5113. The support surface layer 5111 is made of aluminum alloy or carbon fiber material. The outer side surface of the support surface layer 5111 and the adjacent surfaces are all in arc transition. Between the support surface layers 5111 of two adjacent flattening segments 51, corresponding moving grooves 52 and moving protrusions 53 are provided. The length direction of the moving grooves 52 and the moving protrusions 53 passes through the axis of the middle axis. An infrared heating device 54 is installed in the gap between the floating support mechanisms 511. The infrared heating device 54 is distributed along the length direction of the flattening roller 5, and the cross section of the infrared heating device 54 is in a horn-shaped structure. When the flattening roller 5 with a segmented structure works, when the moving frame 4 drives the flattening roller 5 to move along the length direction of the fixed base 11 to perform a flattening operation on the flexible display screen, several groups of flattening segments 51 on the flattening roller 5 work together. Each group of flattening segments 51 is composed of a floating support mechanism 511 arrayed on the central axis 213. The fixed layer 5112 of the floating support mechanism 511 is firmly connected to the central axis 213. The support surface layer 5111 is connected to the fixed layer 5112 through the elastic buffer layer 5113. Its outer side surface is an arc surface in contact with the flexible display screen. And the support surface layer 5111 is made of aluminum alloy material, with arc transition between adjacent surfaces, which can effectively fit the surface of the flexible display screen, reduce damage and provide uniform support. Between two adjacent flattening segments 51, the support surface layer 5111 cooperates with the corresponding moving grooves 52 and moving protrusions 53. The length direction of the moving grooves 52 and the moving protrusions 53 passes through the axis of the middle axis, so that the flattening segments 51 can flexibly adapt to different shapes of the flexible display screen. In the gap between the floating support mechanisms 511, the infrared heating device 54 with a horn-shaped cross section is distributed along the length direction of the flattening roller 5. During the flattening process, the infrared heating device 54 is turned on, and the heat emitted can soften the flexible display screen, reduce its hardness, and cooperate with the physical flattening action of the flattening roller 5, so that the flexible display screen can be flattened more efficiently and more smoothly, improving the flattening quality and effect.

[0043] Working principle: When the flattening device of the flexible display screen works, first move the moving frame 4 on the fixed base 11 to move from the feeding end and cross the first group of adsorption holes 13 at the feeding end. During the movement, the movement of the inner rack 42 of the moving frame 4 drives the adjustment gear 214 to rotate, and the sealing plate 211 in the ventilation pipeline 14 moves from both sides of the negative pressure pipeline 15 to the end of the ventilation pipeline 14, thereby opening the valve group mechanism 2. The negative pressure pipeline 15 is communicated with the ventilation pipeline 14 at the bottom of the first group of adsorption holes 13. At this time, the valve group mechanisms 2 between the ventilation pipelines 14 at the bottoms of the other groups of adsorption holes 13 and the negative pressure pipeline 15 are all closed. Start the negative pressure pump 16, and the negative pressure pump 16 is communicated with a group of adsorption holes 13 at the feeding end of the fixed base 11 through the negative pressure pipeline 15, and the flexible display screen to be flattened is preliminarily positioned and fixed through this group of adsorption holes 13. Then, the flattening mechanism 3 starts to work. The driving mechanism 41 drives the moving frame 4 to move along the length direction of the fixed base 11 from the feeding end to the discharging end in the sliding grooves 17 on both sides of the fixed base 11. During the movement, the moving frame 4 will successively open the valve group mechanisms 2 at the ends of multiple groups of adsorption holes 13 through the inner rack 42. The lifting cylinder 61 on the moving frame 4 drives the mounting bracket 6 and the flattening roller 5 to descend. The flatness monitoring mechanism 7 monitors the contact situation between the flattening roller 5 and the flexible display screen in real time to ensure the flattening effect. The flattening roller 5 performs a flattening operation on the flexible display screen adsorbed on the fixed base 11. The flexible display screen flattened by the flattening roller 5 will be adsorbed and fixed by the adsorption holes 13 on the fixed base 11 that are opened as the moving frame 4 moves, so as to realize the adsorption and fixation of the flexible display screen while the flattening roller 5 on the moving frame 4 flattens the flexible display screen. The loading and unloading mechanism adsorbs the flexible display screen through the electric suction cups of the manipulators at both ends of the fixed base 11 in the length direction. During the feeding process of the flexible display screen, the manipulator at the feeding end adsorbs and places the flexible display screen on the fixed base 11 and adsorbs and fixes it through a group of adsorption holes 13 at the end. After the flexible display screen is flattened, the moving frame 4 returns to the feeding end of the fixed base 11 under the action of the driving mechanism 41, releases the adsorption of the adsorption holes 13 on the flexible display screen, and then the manipulator at the discharging end sucks away the flattened flexible display module through the suction cup. The whole process realizes the efficient adsorption, flattening, loading and unloading operations of the flexible display screen.

[0044] The above are all the preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.

Claims

1. A smoothing device for a flexible display screen, characterized in that: include A fixing mechanism (1) is used for adsorbing a flexible display screen, comprising a fixing base (11) and a frame (12) for mounting the fixing base (11), wherein the fixing base (11) is evenly provided with a plurality of groups of adsorption holes (13), wherein a single group of adsorption holes (13) is distributed along the width direction of the flexible display screen, and the single group of adsorption holes (13) is connected through a ventilation pipe (14), and the ventilation pipes (14) are connected through a negative pressure pipe (15), wherein a valve group mechanism (2) is provided at each connection, and the negative pressure pipe (15) is externally connected to a negative pressure pump (16); A smoothing mechanism (3) is used to smooth the flexible display screen on the fixing mechanism (1), comprising a moving frame (4) slidably mounted on a fixing base (11) and a smoothing roller (5) on the moving frame (4), wherein the moving frame (4) moves along the length direction of the fixing base (11), wherein both sides of the fixing base (11) are provided with slide grooves (17) adapted to the bottom of the moving frame (4), and a driving mechanism (41) for driving the moving frame (4) to move is installed in the slide grooves (17); the smoothing roller (5) is installed on a mounting bracket (6), the top of the mounting bracket (6) is connected to the moving frame (4) via a lifting cylinder (61), and a flatness monitoring mechanism (7) is also provided between the output end of the lifting cylinder (61) and the mounting bracket (6); The loading and unloading mechanism is used for loading and unloading a flexible display screen on a fixed base (11), and comprises manipulators located at both ends of the fixed base (11) in the length direction, and the output end of the manipulator adsorbs the flexible display screen through an electric suction cup.

2. The smoothing device for a flexible display screen according to claim 1, characterized in that: The valve assembly mechanism (2) comprises a valve core mechanism (21) located between the ventilation pipe (14) and the negative pressure pipe (15), the valve core mechanism (21) comprising two groups of horizontally distributed sealing plates (211), the sealing plates (211) being located in the ventilation pipe (14), and sealing rings (212) which are sealed and connected to the ventilation pipe (14) are arranged around the sealing plates (211), the sealing plates (211) are connected via a central axis (213), and the extended end of the central axis (213) passes through the end of the ventilation pipe (14), wherein the spacing between the sealing plates (211) is greater than the inner diameter of the negative pressure pipe (15), the central axis (213) is threadedly connected to the end of the ventilation pipe (14), and the central axis (213) is located at the end of the ventilation pipe (14) and is installed with an adjustment gear (214) which is coaxial with the central axis (213).

3. The smoothing device for a flexible display screen according to claim 2, characterized in that: The sealing plate (211) moves between the two ends of the interface between the ventilation duct (14) and the negative pressure duct (15) and the end of the ventilation duct (14); a rack (42) with a tooth surface facing downward is installed on the inner side surface of the movable frame (4); the rack (42) is meshed with the adjustment gear (214) for transmission.

4. The smoothing device for a flexible display screen according to claim 1, characterized in that: The driving mechanism (41) comprises a servo motor (411) located at the end of the slide groove (17); a screw rod (412) fixedly mounted on the output shaft of the servo motor (411) is adapted to the screw sleeve at the bottom of the moving frame (4); and a bearing seat (413) rotatably connected to the screw rod (412) is mounted at one end of the slide groove (17) away from the servo motor (411); a moving block (43) integrally formed at the bottom of the moving frame (4) moves in coordination with the slide groove (17); the width of the frame bodies on both sides of the moving frame (4) is greater than the width of the moving block (43); and the length of the moving frame (4) is less than the length of the moving block (43).

5. The smoothing device for a flexible display screen according to claim 1, characterized in that: The mounting bracket (6) adopts an inverted U-shaped structure, wherein the top of the mounting bracket (6) is rotatably connected to the output end of the lifting cylinder (61) via a rotating part (62), and the flatness monitoring mechanism (7) at the connection includes two groups of telescopic parts (71) located on the top end surface of the mounting bracket (6), and the telescopic parts (71) are symmetrically installed on both sides of the rotating part (62), and the two ends are respectively rotatably connected to the mounting bracket (6) and the output end of the lifting cylinder (61).

6. The smoothing device for a flexible display screen according to claim 5, characterized in that: The rotating part (62) includes a rotating groove (621) provided at the bottom of the lifting cylinder (61), and a rotating protrusion (622) rotatably connected to the rotating groove (621) is integrally formed at the top center of the mounting bracket (6), wherein the mounting bracket (6) rotates in the rotating groove (621) along the width direction of the fixed base (11), and an angle sensor is installed between the rotating protrusion (622) and the rotating groove (621).

7. The smoothing device for a flexible display screen according to claim 6, characterized in that: The telescopic member (71) comprises a telescopic cavity (711) and a telescopic rod (712), wherein the telescopic rod (712) is slidably mounted in the telescopic cavity (711), and the diameter of the opening end of the telescopic cavity (711) is smaller than the inner diameter of the cavity body of the telescopic cavity (711), and a limiting plate (713) for limiting the telescopic rod (712) in the telescopic cavity (711) is fixed at the end of the telescopic rod (712), wherein a displacement sensor (714) is mounted at one end of the telescopic cavity (711) away from the telescopic rod (712).

8. The smoothing device for a flexible display screen according to claim 1, characterized in that: The smoothing roller (5) adopts a segmented structure, comprising a plurality of smoothing sections (51) distributed along the middle axis of the smoothing roller (5); the smoothing sections (51) include a floating support mechanism (511) arrayed on a central axis (213); the floating support mechanism (511) includes a supporting surface layer (5111) and a fixed layer (5112); the outer side surface of the supporting surface layer (5111) is an arc-shaped surface in contact with the flexible display screen; the fixed layer (5112) is fixedly connected to the central axis (213); and the fixed layer (5112) and the supporting surface layer (5111) are connected via an elastic buffer layer (5113).

9. The smoothing device for a flexible display screen according to claim 8, characterized in that: The supporting surface layer (5111) is made of aluminum alloy or carbon fiber material, and an arc-shaped transition is adopted between the outer side surface of the supporting surface layer (5111) and the adjacent surface, and corresponding movable grooves (52) and movable protrusions (53) are adopted between the supporting surface layers (5111) between two adjacent smoothing sections (51), wherein the length direction of the movable grooves (52) and the movable protrusions (53) passes through the axis of the intermediate shaft.

10. The smoothing device for a flexible display screen according to claim 9, characterized in that: An infrared heating device (54) is installed in the gap between the floating support mechanisms (511), wherein the infrared heating device (54) is distributed along the length direction of the smoothing roller (5), and the cross section of the infrared heating device (54) adopts a trumpet-shaped structure.

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