A flexible screen inner folding shaft

Abstract

The present invention relates to the field of flexible screens, and discloses a folding shaft inside a flexible screen, including a central shell, a screen tightening mechanism, a synchronous motion mechanism, a shaft torque mechanism, a screen avoidance mechanism, and a movable shell, wherein two movable shells are arranged on both sides of the central shell and the two groups of movable shells can rotate freely through the shaft, and an upper cover plate is arranged on the inner side of the movable shell. In the present invention, when the movable platform moves downward, it will drive another group of axis cover plates to move synchronously with the first group of axis cover plates. At this time, the main shell on the other side will be synchronously flipped with the main shell of the active motion, so that the main shells on the left and right sides can be opened and closed at the same time, making it more convenient for people to use. Moreover, the design is realized only by adding a relatively simple and reasonable mechanical device, so that there will be no difficult-to-overcome technical difficulties in production, thereby increasing the popularity of flexible screens.

Description

Technical Field

[0001] The present invention relates to the field of flexible screens, and in particular to a folding hinge inside a flexible screen. Background Art

[0002] Flexible screen refers to flexible OLED. The successful mass production of flexible screen is not only of great benefit to the manufacturing of the new generation of high-end smartphones, but also has a profound impact on the application of wearable devices due to its low power consumption and bendable characteristics.

[0003] The current flexible screen cannot open and close both sides of the screen at the same time during use, which means that you need to use both hands to open and close both sides of the phone at the same time. When closing the screen, there will be an arc-shaped fold in the middle of the screen. The current flexible screen does not have an avoidance mechanism when closing the screen, which makes it easy for the screen to have a gap after closing the screen, affecting the aesthetics. To this end, we propose a folding hinge inside the flexible screen. Summary of the invention

[0004] The present invention mainly solves the technical problems existing in the above-mentioned prior art and provides a folding hinge inside a flexible screen.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a flexible screen internal folding hinge, including a central shell and two movable shells.

[0006] A synchronous motion mechanism is arranged inside the central shell to allow the two movable shells to open and close synchronously.

[0007] The movable shell is provided with a screen tightening mechanism for assisting the screen tightening.

[0008] The movable shell is provided with a rotating shaft torque mechanism for assisting the mobile phone movable shell to flip.

[0009] The movable housing is provided with a screen avoidance mechanism for protecting the flexible screen.

[0010] The movable shell includes an upper cover plate and a main shell. The two main shells are arranged on both sides of the central shell and the two groups of main shells can rotate freely through a rotating shaft. The upper cover plate is arranged on the inner side of the main shell. The upper cover plate is a rectangular plate. A frame 1 is fixedly installed at the outer circle of the main shell. An inner shell is movably installed between the main shell and the central shell. The inner shell is a rectangular plate. A frame 2 is fixedly installed on the side of the inner shell. When the two groups of main shells are merged, the two groups of inner shells will also move accordingly.

[0011] The screen tensioning mechanism includes an aluminum plate, an aluminum slide rail and a POM slider. There are four groups of screen tensioning mechanisms, and the four groups of screen tensioning mechanisms are arranged at the four corners of the two groups of inner and outer shells. The aluminum plate is a rectangular square plate. The four corners of the aluminum plate are fixedly mounted on the main outer shell by screws. An aluminum slide rail is provided on the upper surface of the aluminum plate. The aluminum slide rail is a cross-shaped slide rail. A POM slider is slidably connected inside the aluminum slide rail. The POM slider is cross-shaped. The longitudinal sides of the POM slider have a stroke of one millimeter in the longitudinal groove of the aluminum slide rail. A spring 1 is fixedly installed on the side of the POM slider close to the central outer shell, and the end of the spring 1 away from the POM slider is fixedly connected to the slot set on the main outer shell, and the top of the POM slider is fixedly connected to the bottom surface of the upper cover plate.

[0012] The synchronous motion mechanism is arranged inside the two ends of the central shell, and the synchronous motion mechanism includes a moving platform, an elliptical hole and a fixed plate. The elliptical hole is opened on the front of the moving platform and two groups of elliptical holes are symmetrically opened on each moving platform. An axis is inserted inside the elliptical hole. An arc groove is opened at the position of the central shell corresponding to the elliptical hole. The other end of the axis is inserted in the arc groove. Fixed holes are opened on the moving platforms on the left and right sides of the elliptical hole. A through hole is opened at the position of the central shell corresponding to the fixed hole. A fixed shaft is inserted into the through hole. The inner side of the moving platform is fixedly connected to the fixed plate. An intermediate connecting plate is fixedly installed between the two groups of fixed plates. An axis cover plate is fixedly installed on the outer ends of the axis and the fixed shaft, and the axis cover plate is fixedly installed on the outer surface of the frame 2.

[0013] The rotating shaft torque mechanism includes a fixed sleeve, a push rod and two springs. The fixed sleeve is a block with a square groove in the middle and there are four groups of fixed sleeves. A round hole is opened on the inner wall of the fixed sleeve. The four groups of fixed sleeves are fixedly installed at the corners of the two groups of inner and outer shells by flat head screws. The push rod is a cylindrical long rod. The push rod is longitudinally inserted into the round hole opened in the fixed sleeve, and the two springs are sleeved on the push rod.

[0014] Preferably, one end of the second spring is fixedly connected to the inner wall of the fixed sleeve, and the other end of the second spring is fixedly connected to the outer surface of the push rod. Oblate movable grooves are provided on both sides of one end of the fixed sleeve close to the central shell, and the movable groove is connected to the square groove in the middle of the fixed sleeve. A movable shaft is movably connected inside the movable groove, and a connecting rod is fixedly installed in the middle position of the movable shaft. One end of the connecting rod close to the fixed sleeve is fitted with the push rod, and a circular hole is provided at one end of the connecting rod away from the fixed sleeve.

[0015] Preferably, the avoidance screen mechanism includes an avoidance plate, a linkage shaft and a vertical slider. The linkage shaft is laterally inserted into the circular hole at the tail end of the connecting rod. The vertical slider is fixedly installed on the side of the avoidance plate. A horizontal sliding groove is opened on the inner wall of the second frame at the position corresponding to the vertical slider.

[0016] Preferably, the transverse slide groove is laterally connected to a transverse slider, and the transverse slider can slide freely left and right inside the transverse slide groove. A slide groove is vertically opened on one side surface of the transverse slider close to the vertical slider, and the vertical slider is slidably connected in the slide groove and can move freely up and down inside the slide groove.

[0017] Preferably, the avoidance plate is sleeved on the linkage shaft through a side bushing, and there are four groups of avoidance plates, two longitudinal groups of avoidance plates are fixedly connected with a side connecting plate, the side of the avoidance plate close to the fixed plate is hinged to the fixed plate through a bushing, and the avoidance plate is hinged to the connecting rod through a linkage shaft.

[0018] Beneficial Effects

[0019] The present invention provides a flexible screen internal folding hinge, which has the following beneficial effects:

[0020] (1) The flexible screen has a folding shaft. When the main shell on one side flips inward through the fixed axis, the main shell drives the frame to move synchronously. The frame will drive the axis cover plate to move downward when flipping. When the axis cover plate moves, it will drive the axis to move to both sides through the elliptical hole. The axis moves downward in the arc groove of the center shell. The axis will squeeze the moving platform downward. When the moving platform moves downward, it will drive another set of axis cover plates to move synchronously with the first set of axis cover plates. At this time, the main shell on the other side will flip synchronously with the main shell that moves actively, so that the main shells on the left and right sides can be opened and closed at the same time, making it more convenient for people to use. In addition, the design is achieved only by adding a relatively simple and reasonable mechanical device, so that there will be no difficult-to-overcome technical difficulties during production, thereby increasing the popularity of flexible screens.

[0021] (2) The flexible screen has a folding shaft, and the POM slider slides inside the aluminum slide rail under the force of a spring, and the sliding stroke is one millimeter. When the screens are merged, the POM slider drives the upper cover plate to move away from the central shell. In this way, when the entire flexible screen device is merged, the two sets of screen tightening mechanisms will tighten the screens on both sides, so that there will be more margin at the folded position of the screen to provide for its bending, thereby reducing the longitudinal relative stress when the flexible screen is in use, protecting the entire assembly of the flexible screen from the side, and increasing the service life of the flexible screen.

[0022] (3) The flexible screen has an internal folding hinge. When the two sets of main shells flip through the middle position, the push rod moves across the critical point of the force direction of the second spring. At this time, the connecting rod will give the fixed sleeve a force in the same direction. When the two sets of main shells are opened or merged, as long as the connecting rod passes the critical point of the second spring, the main shells will generate an auxiliary force, thereby achieving more convenient opening and merging of the mobile phone screens, increasing the practicality of the device, not only achieving more convenient opening and merging of the mobile phone screens, but also allowing the two main shells of the foldable mobile phone to fit tightly when closed, preventing the foldable mobile phone from accidentally opening under external force.

[0023] (4) The flexible screen has an internal folding axis. When the two sets of main shells merge inward, the vertical sliders at both ends of the avoidance plate will move downward in the slide groove inside the horizontal slider. At the same time, the vertical slider squeezes the horizontal slider to slide horizontally in the horizontal slide groove. The linkage axis makes the two sets of avoidance plates on the same side move in opposite directions. Therefore, when the two sets of main shells merge, a rectangular space is formed at the folding position of the screen. This space makes it easier to store the arc-shaped corner of the flexible screen here. The avoidance plate can not only assist in the folding of the flexible screen, but also better protect the corner of the flexible screen when the mobile phone is folded, thereby achieving the effect of protecting the screen.

[0024] (5) The flexible screen has a folding shaft, one end of the connecting rod close to the fixed sleeve is fitted with the push rod, and the end of the connecting rod away from the fixed sleeve is provided with a circular hole, and a horizontal slide groove is provided on the inner wall of the second frame at a position corresponding to the vertical slider, and the horizontal slide groove is connected to the horizontal slider for horizontal sliding, and the horizontal slider can slide freely left and right in the horizontal slide groove, and a slide groove is vertically provided on a side surface of the horizontal slider close to the vertical slider, and the vertical slider is slidably connected in the slide groove and can move freely up and down in the slide groove, and a side connecting plate is fixedly connected between the two longitudinal avoidance plates, and a shaft sleeve is fixedly installed on the side of the avoidance plate close to the fixed plate, and the shaft sleeve is sleeved on the fixed shaft, and the two mechanisms are driven to operate simultaneously through the connecting rod. Such a design greatly reduces the space occupied by the relevant mechanical mechanism in the mobile phone, thereby achieving the effect of streamlining the size of the mobile phone.

[0025] (6) The foldable hinge inside the flexible screen allows only one camera to be set up. By flipping the camera to adjust its front and rear position, the main camera can be used as both the front and rear cameras. This means that mobile phone manufacturers can focus on the development of specific cameras instead of dispersing their energy on multiple cameras, while saving valuable space inside the phone. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall schematic diagram of the present invention;

[0027] Figure 2 It is the overall internal schematic diagram of the present invention;

[0028] Figure 3 The state diagram of the present invention when it is combined;

[0029] Figure 4 It is a specific schematic diagram of the inner and outer shells of the present invention;

[0030] Figure 5 For the present invention Figure 2 The enlarged view of point A in the middle;

[0031] Figure 6 For the present invention Figure 3 The enlarged view of point B in the middle;

[0032] Figure 7 For the present invention Figure 4 Enlarged view of point C in the middle;

[0033] Figure 8 For the present invention Figure 6 The enlarged view of point D in the middle;

[0034] Fig. 9 A specific schematic diagram of the screen avoidance mechanism of the present invention;

[0035] Fig.10 It is a specific schematic diagram of the central shell of the present invention.

[0036] Legend:

[0037] 1 center shell, 11 arc groove, 2 movable shell, 21 upper cover plate, 22 frame one, 221 frame two, 23 inner shell, 24 axis cover plate, 25 middle connecting plate, 26 side connecting plate, 27 main shell, 3 screen tensioning mechanism, 31 aluminum plate, 32 aluminum slide rail, 33 POM slider, 34 spring one, 4 synchronous motion mechanism, 41 moving platform, 42 elliptical hole, 43 fixed plate, 44 fixed hole, 45 axis, 46 fixed shaft, 5 rotating shaft torque mechanism, 51 fixed sleeve, 52 push rod, 53 spring two, 54 moving groove, 55 connecting rod, 6 avoidance screen mechanism, 61 avoidance plate, 62 linkage shaft, 63 sleeve, 64 vertical slider, 65 horizontal slider, 66 horizontal slide groove. DETAILED DESCRIPTION

[0038] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0039] Embodiment: A folding hinge in a flexible screen, such as Figure 1-Figure 10 As shown, it includes a central housing 1 and two movable housings 2. The two movable housings 2 are arranged on both sides of the central housing 1 and the two groups of movable housings 2 can rotate freely through a rotating shaft.

[0040] The movable shell 2 includes an upper cover plate 21 and a main shell 27. The upper cover plate 21 is arranged on the inner side of the main shell 27. The upper cover plate 21 is a rectangular plate. A frame 22 is fixedly installed at the outer circle of the main shell 27. An inner shell 23 is movably installed between the main shell 27 and the central shell 1. The inner shell 23 is a rectangular plate. A frame 221 is fixedly installed on the side of the inner shell 23. When the two groups of main shells 27 are merged, the two groups of inner shells 23 will also move accordingly.

[0041] The interior of the central shell 1 is provided with a synchronous motion mechanism 4 for allowing the two movable shells 2 to open and close synchronously. The synchronous motion mechanism 4 is arranged inside the two ends of the central shell 1. The synchronous motion mechanism 4 includes a moving platform 41, an elliptical hole 42 and a fixed plate 43. The elliptical hole 42 is opened on the front of the moving platform 41 and two groups of elliptical holes 42 are symmetrically opened on each moving platform 41. An axis 45 is inserted inside the elliptical hole 42. The central shell 1 is provided with an arc groove 11 at a position corresponding to the elliptical hole 42. The other end of the axis 45 is inserted in the arc groove 11. Fixed holes 44 are opened on the moving platforms 41 on the left and right sides of the elliptical hole 42. The central shell 1 is provided with a through hole at a position corresponding to the fixed hole 44. A fixed shaft 46 is inserted into the through hole. The inner side of the moving platform 41 is fixedly connected to the fixed plate 43. An intermediate connecting plate 25 is fixedly installed between the two groups of fixed plates 43. The outer ends of the axis 45 and the fixed shaft 46 are fixedly installed with an axis cover plate 24. The axis cover plate 24 is fixedly installed on the outer surface of the frame 221.

[0042] The movable shell 2 is provided with a screen tightening mechanism 3 for assisting screen tightening, the screen tightening mechanism 3 comprises an aluminum plate 31, an aluminum slide rail 32 and a POM slider 33, there are four groups of screen tightening mechanisms 3, and the four groups of screen tightening mechanisms 3 are arranged at the four corners of the two groups of inner shells 23, the aluminum plate 31 is a rectangular square plate, the four corners of the aluminum plate 31 are fixedly mounted on the main shell 27 by screws, an aluminum slide rail 32 is provided on the upper surface of the aluminum plate 31, the aluminum slide rail 32 is a cross-shaped slide rail, and a POM slider 33 is slidably connected inside the aluminum slide rail 32, the POM slider 33 is a cross-shaped, and the stroke of the two longitudinal sides of the POM slider 33 in the longitudinal slide groove of the aluminum slide rail 32 is one millimeter, a spring 34 is fixedly installed on the side of the POM slider 33 close to the central shell 1, the end of the spring 34 away from the POM slider 33 is fixedly connected to the card slot set on the main shell 27, and the top of the POM slider 33 is fixedly connected to the bottom surface of the upper cover 21.

[0043] The movable housing 2 is provided with a rotating shaft torque mechanism 5 for assisting the main housing 27 of the mobile phone to flip. The rotating shaft torque mechanism 5 includes a fixed sleeve 51, a push rod 52 and a spring 2 53. The fixed sleeve 51 is a block with a square groove in the middle and there are four groups of fixed sleeves 51. A round hole is opened on the inner side wall of the fixed sleeve 51. The four groups of fixed sleeves 51 are fixedly installed at the corners of the two groups of inner housings 23 by flat head screws. The push rod 52 is a cylindrical long rod. The push rod 52 is longitudinally inserted into the round hole opened in the fixed sleeve 51. The spring 2 53 is sleeved on the push rod 52. On the rod 52, one end of the spring 53 is fixedly connected to the inner wall of the fixed sleeve 51, and the other end of the spring 53 is fixedly connected to the outer surface of the push rod 52. The fixed sleeve 51 is provided with oblate movable grooves 54 on both sides of one end close to the central shell 1. The movable groove 54 is connected to the square groove in the middle of the fixed sleeve 51. A movable shaft is movably connected inside the movable groove 54. A connecting rod 55 is fixedly installed in the middle position of the movable shaft. The end of the connecting rod 55 close to the fixed sleeve 51 is in contact with the push rod 52, and a round hole is provided at the end of the connecting rod 55 away from the fixed sleeve 51.

[0044] The movable housing 2 is provided with a screen avoidance mechanism 6 for protecting the flexible screen, and the screen avoidance mechanism 6 includes a avoidance plate 61, a linkage shaft 62 and a vertical slider 64. The linkage shaft 62 is laterally inserted into the circular hole at the tail end of the connecting rod 55, and the vertical slider 64 is fixedly installed on the side of the avoidance plate 61. A transverse slide groove 66 is provided on the inner side wall of the frame 221 at a position corresponding to the vertical slider 64. The transverse slide groove 66 is laterally slidably connected to the transverse slider 65, and the transverse slider 65 can slide freely left and right in the transverse slide groove 66. A sliding groove is vertically opened on one side surface of the horizontal slider 65 close to the vertical slider 64, the vertical slider 64 is slidably connected in the sliding groove and can freely move up and down inside the sliding groove, the avoidance plate 61 is sleeved on the linkage shaft 62 through the side shaft sleeve, and there are four groups of avoidance plates 61, and the side connecting plates 26 are fixedly connected between the two longitudinal groups of avoidance plates 61, the side of the avoidance plate 61 close to the fixed plate 43 is hinged to the fixed plate 43 through the shaft sleeve 63, and the avoidance plate 61 is hinged to the connecting rod 55 through the linkage shaft 62.

[0045] Working principle of the present invention:

[0046] Step 1: The POM slider 33 will slide inside the aluminum slide rail 32 under the force of spring 1 34 and the sliding stroke is one millimeter. When the screen is merged, the POM slider 33 drives the upper cover plate 21 to move away from the central shell 1, so that the entire flexible screen device will tighten the screens on both sides through the screen tightening mechanism 3 when merging, so that the folded position of the screen will have more margin to provide for its bending.

[0047] Step 2: When the main shell 27 on one side flips inward through the fixed axis 46, the main shell 27 drives the frame 221 to move synchronously. The frame 221 will drive the axis cover 24 to move downward when flipping. The axis 45 moves downward in the arc groove 11 of the central shell 1. The axis 45 will squeeze the moving platform 41 downward. When the moving platform 41 moves downward, it will drive another group of axis cover plates 24 to move synchronously with the first group of axis cover plates 24. At this time, the main shell 27 on the other side will flip synchronously with the actively moving main shell 27, so that the main shells 27 on the left and right sides can be opened and closed at the same time.

[0048] Step 3: When the two sets of main shells 27 merge inwardly, the vertical slider 64 will move downward in the slide groove inside the horizontal slider 65, and at the same time, the vertical slider 64 squeezes the horizontal slider 65 to slide horizontally in the horizontal slide groove 66. When the moving platform 41 moves downward, the moving platform 41 makes the top ends of the two sets of avoidance plates 61 on the same side move in opposite directions, so that when the two sets of main shells 27 merge, a rectangular space will be formed at the folded position of the screen.

[0049] Step 4: When the two sets of main housings 27 flip over the middle position, the connecting rod 55 moves across the critical point of the force direction of the spring 2 53, and the spring 2 53 will push the transverse slider 65 in the opposite direction. At this time, the transverse slider 65 will give the fixing sleeve 51 a force in the same direction under the squeezing of the avoidance plate 61. When the two sets of main housings 2 are opened or merged, as long as the connecting rod 55 passes the critical point of the spring 2 53, the transverse slider 65 will give the two sets of main housings 2 an auxiliary force in the same direction.

[0050] Finally, it should be pointed out that the above embodiments are only representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention should be considered to belong to the protection scope of the present invention.

Claims

1. A flexible screen internal folding hinge, comprising a central housing (1) and two movable housings (2), characterized in that: The two movable housings (2) are arranged on both sides of the central housing (1), and the two movable housings (2) can rotate freely via a rotating shaft; A synchronous motion mechanism (4) is arranged inside the central housing (1) to allow the two movable housings (2) to open and close synchronously; The synchronous motion mechanism (4) is arranged inside the two ends of the central housing (1), and the synchronous motion mechanism (4) comprises a fixing plate (43); The movable housing (2) is provided with a screen tightening mechanism (3) for assisting in tightening the screen; The movable housing (2) is provided with a rotating shaft torque mechanism (5); The movable housing (2) comprises an upper cover plate (21) and a main housing (27); an inner housing (23) is movably mounted between the main housing (27) and the central housing (1); a second frame (221) is fixedly mounted on the side of the inner housing (23); The movable housing (2) is provided with a screen avoidance mechanism (6) for protecting the flexible screen; The rotating shaft torque mechanism (5) comprises a fixing sleeve (51), a push rod (52) and a second spring (53); The fixing sleeve (51) is a block with a square groove in the middle and there are four sets of fixing sleeves (51). A round hole is opened on the inner wall of the fixing sleeve (51). The four sets of fixing sleeves (51) are fixedly installed at the corners of the two sets of inner and outer shells (23) by flat head screws. The push rod (52) is a cylindrical long rod. The push rod (52) is longitudinally inserted into the round hole opened in the fixing sleeve (51). The second spring (53) is sleeved on the push rod (52). One end of the second spring (53) is fixedly connected to the inner wall of the fixing sleeve (51). The second spring (53) is The other end of (53) is fixedly connected to the outer surface of the push rod (52), and oblate movable grooves (54) are provided on both sides of one end of the fixed sleeve (51) close to the central housing (1), and the movable groove (54) is connected to the square groove in the middle of the fixed sleeve (51), and a movable shaft is movably connected inside the movable groove (54), and a connecting rod (55) is fixedly installed in the middle of the movable shaft, and one end of the connecting rod (55) close to the fixed sleeve (51) is in contact with the push rod (52), and one end of the connecting rod (55) away from the fixed sleeve (51) is provided with a round hole; The avoidance screen mechanism (6) comprises an avoidance plate (61), a linkage shaft (62) and a vertical slide block (64); The linkage shaft (62) is laterally inserted into the circular hole at one end of the connecting rod (55) away from the fixed sleeve (51); a vertical slider (64) is fixedly installed on the side of the avoidance plate (61); a transverse slide groove (66) is provided on the inner wall of the second frame (221) at a position corresponding to the vertical slider (64); the transverse slide groove (66) is laterally slidably connected to the transverse slider (65); the transverse slider (65) can freely slide left and right in the transverse slide groove (66); a side surface of the transverse slider (65) close to the vertical slider (64) is provided. A slide groove is vertically opened, a vertical slider (64) is slidably connected in the slide groove and the vertical slider (64) can freely move up and down inside the slide groove, the avoidance plate (61) is sleeved on the linkage shaft (62) through a side shaft sleeve, and there are four groups of avoidance plates (61), and a side connecting plate (26) is fixedly connected between two longitudinal groups of avoidance plates (61), and the side of the avoidance plate (61) close to the fixed plate (43) is hinged to the fixed plate (43) through the shaft sleeve (63), and the avoidance plate (61) is hinged to the connecting rod (55) through the linkage shaft (62).

2. The flexible screen inner folding hinge according to claim 1, characterized in that: An upper cover plate (21) is arranged on the inner side surface of the main shell (27), and the upper cover plate (21) is a rectangular plate. A frame (22) is fixedly mounted on the outer ring of the main shell (27). The inner shell (23) is a rectangular plate. When the two sets of main shells (27) are combined, the two sets of inner shells (23) will also move accordingly.

3. The flexible screen inner folding hinge according to claim 2, characterized in that: The screen tensioning mechanism (3) comprises an aluminum plate (31), an aluminum slide rail (32) and a POM slide block (33); There are four groups of screen tensioning mechanisms (3), and the four groups of screen tensioning mechanisms (3) are arranged at the four corners of the two groups of inner shells (23). The aluminum plate (31) is a rectangular square plate. The four corners of the aluminum plate (31) are fixedly mounted on the main shell (27) by screws. An aluminum slide rail (32) is provided on the upper surface of the aluminum plate (31). The aluminum slide rail (32) is a cross-shaped slide rail. A POM slider (33) is slidably connected inside the aluminum slide rail (32). The POM slider (33) is cross-shaped. The stroke of the two longitudinal sides of the POM slider (33) in the longitudinal slide groove of the aluminum slide rail (32) is one millimeter. A spring 1 (34) is fixedly mounted on the side of the POM slider (33) close to the central shell (1). The end of the spring 1 (34) away from the POM slider (33) is fixedly connected to a slot provided on the main shell (27). The top of the POM slider (33) is fixedly connected to the bottom surface of the upper cover plate (21).

4. The flexible screen inner folding hinge according to claim 1, characterized in that: The synchronous motion mechanism (4) further comprises a moving platform (41) and an elliptical hole (42); The elliptical holes (42) are formed on the front surface of the moving platform (41), and two groups of elliptical holes (42) are symmetrically formed on each moving platform (41). An axis (45) is inserted into the inside of the elliptical holes (42). An arc groove (11) is formed on the central shell (1) at a position corresponding to the elliptical hole (42), and the other end of the axis (45) is inserted into the arc groove (11). Fixing holes (44) are formed on the moving platforms (41) on the left and right sides of the elliptical hole (42). A through hole is formed on the central shell (1) at a position corresponding to the fixing hole (44), and a fixing shaft (46) is inserted into the through hole. The inner side of the moving platform (41) is fixedly connected to the fixing plate (43), and an intermediate connecting plate (25) is fixedly installed between the two groups of fixing plates (43). An axis cover plate (24) is fixedly installed on the outer ends of the axis (45) and the fixing shaft (46), and the axis cover plate (24) is fixedly installed on the outer surface of the second frame (221).

Images