Passive hinge based on the bending of a water droplet shape on a flexible display screen

Abstract

The passive hinge based on the water droplet-shaped bending of a flexible display screen disclosed in the present invention comprises a base, wherein symmetrically distributed first movable seats are provided on both sides of the base, an intermediate movable frame is provided on the base, and first rotating arms linked to the intermediate movable frame are provided on both sides of the intermediate movable frame respectively, the first rotating arm is rotatably connected with the first movable seat, a sliding seat for realizing the rotating connection is provided between the first rotating arm and the intermediate movable frame, and the sliding seat is slidably connected with the base; a first arc slider is provided on the base, and a first arc slide groove slidably matched with the first arc slider is provided on the sliding seat; a straight slider is provided on one side of the sliding seat, a straight slide groove is provided on the first rotating arm, and the straight slider slidably matches in the straight slide groove; the first rotating arm and the intermediate movable frame are linked to each other by arranging a slide groove and a sliding column for slidably matching.

Description

Technical Field

[0001] The present invention relates to the technical field of folding screen hinge design, and particularly to a passive hinge based on the bending of a water droplet shape of a flexible display screen. Background Art

[0002] Compared with the traditional backlight screen (LCD), the flexible screen (OLED) can emit light by itself. Through self-luminescence, excellent image quality can be achieved, the color rendering is natural and there is no harm of blue light; the screen can be flexibly used, bent and folded; it is flexible, thin, does not generate heat, and has a comfortable feel, and can create various screen forms such as flexible screens, curved screens, and folding screens, meeting the development needs of mobile phones. In the future, flexible screens will be widely used with the continuous penetration of personal intelligent terminals, and can also be used in various flexible screen electronic terminal products, such as tablets, monitors, and intelligent wearable devices, etc.

[0003] The flexible screen is generally composed of multiple layers of polymer materials and OCA optical glue. For a complete flexible display screen composed of multiple layers of display materials, multiple neutral layers are formed in its stack structure. Due to the relationship of multiple layers of stacking, factors such as elastic changes will occur in different stacked layers of the flexible display screen, and its bending movement trajectory must be irregular. When the flexible screen is applied to a folding screen mobile phone, it needs to have good plasticity and ductility. The tests are as follows: after repeated stretching and compression, whether the screen can still remain without creases and damage; whether the circuit boards and components inside the mobile phone can withstand folding and bending, etc.; secondly, the bending area of the entire screen of the foldable mobile phone is connected to the middle frame or shell by a precise hinge to achieve the bending and support of the screen; at the same time, the hinge needs to be durable and reliable enough to withstand 200,000 folds without making mistakes. The fitting angle between the hinge and the screen is one of the technical difficulties of foldable mobile phones, and there are also problems such as low processing yield and high cost that need to be solved urgently.

[0004] To meet the above functions, a precise micro-structure hinge is required. Currently, the existing hinges can basically achieve simple functions such as damping torque and synchronization, and cannot completely solve the problems of eliminating creases and ensuring service life, and cannot meet the high-precision and cost requirements of industrial manufacturing.

[0005] One of the mainstream forms of the existing inner folding method is to achieve a water droplet shape in the bending area after bending. The passive rotating shaft used to meet the bending requirements of the water droplet shape is the main bending mechanism. Summary of the Invention

[0006] The purpose of the present invention is to provide a passive hinge based on the bending of a water droplet shape of a flexible display screen, overcoming the deficiencies in the prior art.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A passive hinge based on the bending of a water droplet shape of a flexible display screen, comprising a base, symmetrically distributed first movable seats are provided on both sides of the base, an intermediate movable frame is provided on the base, first rotating arms linked thereto are respectively provided on both sides of the intermediate movable frame, the first rotating arms are rotatably connected to the first movable seats, a sliding seat for realizing the rotational connection is provided between the first rotating arms and the base, and the sliding seat is slidably connected to the base;

[0009] A first arc-shaped slider is provided on the first base, and a first arc-shaped chute slidably matched with the arc-shaped slider is provided on the sliding seat;

[0010] A straight slider is provided on one side of the sliding seat, a straight chute is provided on the first rotating arm, and the straight slider is slidably matched in the straight chute;

[0011] A second arc-shaped chute is provided on the first rotating arm, and a second arc-shaped slider slidably matched with the second arc-shaped chute is provided on the first movable seat;

[0012] Linkage between the first rotating arm and the intermediate movable frame is achieved by providing a slidably matched chute and sliding column.

[0013] Particularly, a synchronization mechanism and an auxiliary mechanism are provided on one side of the base. The synchronization mechanism includes a connecting seat, the auxiliary mechanism includes symmetrically distributed connecting shafts, a second rotating arm is provided on the connecting seat, the second rotating arms are symmetrically distributed on both sides of the connecting seat, and a plurality of mutually meshing gears and gear movable blocks are provided between the base and the connecting seat, and a positioning connecting plate and a clamping connecting plate for connection positioning are provided between the base and the connecting seat.

[0014] Particularly, a cam connecting plate is provided on the connecting shaft, and the cam connecting plate and the cam on the second rotating arm are in concave-convex cooperation to achieve self-locking at the 0-degree and 180-degree positions, and a compression spring for realizing elastic force and torsion control is provided on the connecting shaft.

[0015] Particularly, a second sliding block is provided on the second rotating arm, a second sliding groove is provided on the first movable seat, and the second sliding block is slidably matched in the second sliding groove to achieve the linkage cooperation between the first movable seat and the second rotating arm.

[0016] Particularly, a rotating shaft cover is provided under the base, and support plates are provided on both sides of the base to form a two-plate structure. A cover plate is provided on the base, and longitudinally distributed pins and springs are provided on the base, and the up and down movement of the cover plate is supported by the pins and springs to achieve a three-plate hinge structure.

[0017] Specifically, a connection groove is provided inside the second rotating arm, a connection post is provided on the gear movable block, and the connection groove cooperates with the connection post to drive the gear movable block and the gear to rotate synchronously, achieving synchronous rotation of 0° - 180°.

[0018] Specifically, a third rotating arm is provided between the first movable seat and the base, and the third rotating arm links the base and the first movable seat to form a three-axis structure.

[0019] The beneficial effects of the present invention are as follows: The passive hinge based on the bending of the water droplet shape of the flexible display screen provided by the present invention realizes synchronization through a gear set, multiple movable blocks assist in connection and positioning, and the sliding column and the sliding groove are slidably matched, combined with the matching bending mechanism of the arc and the arc groove to achieve bending. Its bending mechanism meets the design of multi-axis mechanisms such as two-axis or three-axis, and flexibly realizes the overall structural layout of two-board or three-board according to application terminals with different parameters. Moreover, the front and rear distributions of the round shaft or semi-circular shaft are flexible and variable. Description of the Drawings

[0020] Figure 1 It is the overall structure diagram of the hinge.

[0021] Figure 2 It is the usage state diagram of the two-board structure.

[0022] Figure 3 It is the usage state structure diagram of the three-board type.

[0023] Figure 4 It is the exploded view of the two-axis hinge.

[0024] Figure 5 It is the decomposition of the three-axis hinge Figure 1 .

[0025] Figure 6 It is the decomposition of the three-axis hinge Figure 2 .

[0026] Figure 7 It is the decomposition of the hinge assembly Figure 1 .

[0027] Figure 8 It is the decomposition of the hinge assembly Figure 2 .

[0028] Figure 9 It is the decomposition of the hinge assembly Figure 3 .

[0029] Figure 10 It is the decomposition of the hinge assembly Figure 4 .

[0030] Figure 11 It is the decomposition of the hinge assembly Figure 5 .

[0031] Figure 12 Hinge assembly disassembly Figure 6 .

[0032] Figure 13 Hinge assembly disassembly Figure 7 .

[0033] Figure 14 Hinge assembly disassembly Figure 8 .

[0034] Figure 15 Hinge assembly disassembly Figure 9 .

[0035] Figure 16 Hinge assembly disassembly Figure 10 .

[0036] Figure 17 Hinge assembly disassembly Figure 10 one.

[0037] Figure 18 It is one of the base diagrams of the hinge.

[0038] Figure 19 , Figure 20 It is a structural diagram of the base of the hinge and the third rotating arm.

[0039] Figure 21 It is a structural diagram of the sliding seat and the first rotating arm.

[0040] Figure 22 , Figure 23 It is a structural diagram of the first rotating arm and the intermediate movable frame.

[0041] Figure 24 It is the structural diagram of the second rotating arm and the gear movable block.

[0042] Figure 25 It is a structural diagram of the second rotating arm and the first movable seat.

[0043] Figure 26 and Figure 27 It is a schematic diagram of half of the components in the three-axis structure.

[0044] Figures 28 - 34 It is a structural diagram of the first rotating arm in the three-plate structure.

[0045] Figure 35 Schematic diagram of the rack and pinion synchronization mechanism.

[0046] Figure 36 Schematic diagram of the lever synchronization mechanism.

[0047] Figure 37 Schematic diagram of the slide bar synchronization mechanism.

[0048] Figure 38Schematic diagram of the loose piece synchronization mechanism.

[0049] Figure 39 Exploded view of the loose piece synchronization mechanism.

[0050] Figure 40 Schematic diagram of the screw synchronization mechanism.

[0051] Figure 41 Schematic diagram of the commutation synchronization mechanism.

[0052] Figure 42 Exploded view of the commutation synchronization mechanism.

[0053] Figure 43 Schematic diagram of the worm and worm gear synchronization mechanism. Specific implementation mode

[0054] The present invention will be further described below in conjunction with the accompanying drawings of the specification:

[0055] Example 1:

[0056] As Figures 1 - 17 shown, a hinge with a two-axis structure includes a base 1. Symmetrically distributed first movable seats 2 are provided on both sides of the base 1. An intermediate movable frame 3 is provided on the base 1. First rotating arms 4 linked therewith are respectively provided on both sides of the intermediate movable frame 3. The first rotating arms 4 are rotatably connected to the first movable seats 2. A sliding seat 5 for realizing the rotational connection is provided between the first rotating arms 4 and the base 1. The sliding seat 5 is slidably connected to the base 1. A first arc-shaped slider 201 is provided on the base 1. A first arc-shaped chute 202 slidably engaged with the first arc-shaped slider 201 is provided on the sliding seat 5. A straight slider 203 is provided on one side of the sliding seat 5. A straight chute 204 is provided on the first rotating arm 4. The straight slider 203 is slidably engaged in the straight chute 204.

[0057] On one side of the base 1, a synchronization mechanism and an auxiliary mechanism are provided. The synchronization mechanism includes a connecting seat 6, and the auxiliary mechanism includes symmetrically distributed connecting shafts 7. A second rotating arm 8 is provided on the connecting seat 6. The second rotating arms 8 are symmetrically distributed on both sides of the connecting seat 6. And a plurality of mutually meshing gears 9 and gear moving blocks 10 are provided between the base 1 and the connecting seat 6. A positioning connecting plate 11 and a clamping connecting plate 12 for connection and positioning are provided between the base 1 and the connecting seat 6. A cam connecting plate 13 is provided on the connecting shaft 7. The cam connecting plate 13 and the cam on the second rotating arm 8 are in concave-convex cooperation to achieve self-locking at the 0-degree and 180-degree positions. A compression spring 14 for realizing elastic force and torsion control is provided on the connecting shaft 7. A second sliding block 209 is provided on the second rotating arm 8. A second sliding groove 210 is provided on the first movable seat 2. The second sliding block 209 slides in the second sliding groove 210 to realize the linkage cooperation between the first movable seat 2 and the second rotating arm 8. A connecting groove 211 is provided inside the second rotating arm 8. A connecting column 212 is provided on the gear moving block 10. The connecting groove 211 and the connecting column 212 cooperate to drive the gear moving block 10 and the gear 9 to rotate synchronously to achieve 0-degree to 180-degree rotation synchronization.

[0058] In the above embodiments, the hinge can be divided into a three-plate structure design and a two-plate structure design, as described below:

[0059] As Figure 2 shown, a rotating shaft cover 18 is provided under the base 1, and support plates 19 are provided on both sides of the base 1 to form a two-plate hinge structure.

[0060] As Figure 3 、 Figure 16 shown, a cover plate 15 is provided at the middle position of the upper part of the base 1, and longitudinal pins 16 and springs 17 are provided on the base 1. The up and down movement of the cover plate 15 is supported by the pins 16 and the springs 17 to achieve a three-plate hinge structure.

[0061] Combined with Figure 23 and Figures 28 - 32 shown, when the hinge is of a two-plate structure, a fixing column 213 is provided on the first rotating arm, and the fixing column 213 is fixedly combined and connected with the support plate 19. When the hinge is of a three-plate structure, the upper part of the first rotating arm is a supporting surface 214, and the supporting surface 214 is combined and connected with the support plate 19 and the cover plate 15. That is, no matter how the structure of the hinge itself changes, in the three-axis or two-axis structure design, to meet the three-plate or two-plate structure design, only the structural characteristics of the first rotating arm need to be changed according to the above design, and other structural designs do not need to be changed.

[0062] In the above embodiments, the linkage mode between the first movable seat and the first rotating arm is as follows:

[0063] Solution 1: As shown in Figures 7 - 18 , in combination with Figure 25 , a second arc-shaped sliding groove 205 is provided on the first rotating arm 4, and a second arc-shaped sliding block 206 that is slidably engaged with the second arc-shaped sliding groove 205 is provided on the first movable seat 2; when the second arc-shaped sliding groove 205 is provided on the inner side edge of the first movable seat 2, the arm extension of the first rotating arm 4 is relatively short, and the entire hinge presents a structure design of a front-mounted semi-circular shaft. When the second arc-shaped sliding groove 205 is provided on the outer side edge of the first movable seat 2, the arm extension of the first rotating arm 4 is relatively long, and the entire hinge presents a structure design of a rear-mounted semi-circular shaft.

[0064] Solution 2: As shown in Figure 7 Figure - Figure 18 , in combination with Figure 29 、 Figure 33 , a pin shaft 215 is provided on the first rotating arm 4, and a pin hole 216 that is rotatably engaged with the pin shaft 215 is provided on the first movable seat 2; when the pin hole 216 is provided on the inner side edge of the first movable seat 2, the arm extension of the first rotating arm 4 is relatively short, and the entire hinge presents a structure design of a front-mounted circular shaft. When the pin hole 216 is provided on the outer side edge of the first movable seat 2, the arm extension of the first rotating arm 4 is relatively long, and the entire hinge presents a structure design of a rear-mounted circular shaft.

[0065] Solution 3: As shown in Figures 13 - 17 , based on the rear-mounted semi-circular shaft structure design and the rear-mounted circular shaft design of Solution 1 and Solution 2 above, a curve groove 217 is provided on the first movable seat 2, a second sliding groove 218 is provided on the sliding seat 5, a second sliding column 219 and a second curve slider 220 are provided on the support plate 19. The curve groove 217 is slidably engaged with the second curve slider 220, and the second sliding groove 218 is slidably engaged with the second sliding column 219 to realize the linkage cooperation between the first movable seat 2, the support plate 19 and the sliding seat 5.

[0066] Embodiment 2:

[0067] As shown in Figure 5 、 Figure 6As shown in the figure, the hinge with a three-axis structure includes a base 1. Symmetrically distributed first movable seats 2 are provided on both sides of the base 1. An intermediate movable frame 3 is provided on the base 1. First rotating arms 4 that are linked to it are respectively provided on both sides of the intermediate movable frame 3. The first rotating arms 4 are rotatably connected to the first movable seats 2. A sliding seat 5 for realizing the rotational connection is provided between the first rotating arms 4 and the intermediate movable frame 3. The sliding seat 5 is slidably connected to the base 1. A first arc-shaped slider 201 is provided on the base 1. A first arc-shaped chute 202 that slidably cooperates with the first arc-shaped slider 201 is provided on the sliding seat 5. A straight slider 203 is provided on one side of the sliding seat 5. A straight chute 204 is provided on the first rotating arm 4. The straight slider 203 slidably cooperates within the straight chute 204. A third rotating arm 20 is provided between the first movable seat 2 and the base 1. The third rotating arm 20 links the base 1 and the first movable seat 2 to form a three-axis structure.

[0068] A synchronization mechanism and an auxiliary mechanism are provided on one side of the base 1. The synchronization mechanism includes a connecting seat 6. The auxiliary mechanism includes symmetrically distributed connecting shafts 7. A second rotating arm 8 is provided on the connecting seat 6. The second rotating arms 8 are symmetrically distributed on both sides of the connecting seat 6. A plurality of mutually meshing gears 9 and gear movable blocks 10 are provided between the base 1 and the connecting seat 6. A positioning connecting plate 11 and a clamping connecting plate 12 for connection positioning are provided between the base 1 and the connecting seat 6. A cam connecting plate 13 is provided on the connecting shaft 7. The cam connecting plate 13 and the cam on the second rotating arm 8 are in concave-convex cooperation to achieve self-locking at the 0-degree and 180-degree positions. A compression spring 14 for realizing elastic force and torsion control is provided on the connecting shaft 7. A second sliding block 209 is provided on the second rotating arm 8. A second sliding groove 210 is provided on the first movable seat 2. The second sliding block 209 slidably cooperates within the second sliding groove 210 to achieve the linkage cooperation between the first movable seat 2 and the second rotating arm 8. A connecting groove 211 is provided on the inner side of the second rotating arm 8. A connecting column 212 is provided on the gear movable block 10. The connecting groove 211 and the connecting column 212 cooperate to drive the gear movable block 10 and the gear 9 to rotate synchronously to achieve synchronous rotation from 0 degrees to 180 degrees.

[0069] In the above embodiments, the hinge can be divided into a three-plate structure design and a two-plate structure design, as described below:

[0070] As Figure 2 shown, a rotating shaft cover 18 is provided under the base 1. Support plates 19 are provided on both sides of the base 1 to form a two-plate hinge structure.

[0071] As Figure 3 、 Figure 16As shown, a cover plate 15 is provided at the middle position on the upper part of the base 1, and pins 16 and springs 17 distributed longitudinally are provided on the base 1. The up-and-down movement of the cover plate 15 is supported by the pins 16 and the springs 17 to realize a three-plate hinge structure.

[0072] Combined with Figure 23 and Figures 28 - 32 As shown, when the hinge is a two-plate structure, a fixing column 213 is provided on the first rotating arm. The fixing column 213 is fixedly connected to the support plate 19 in a combined manner. When the hinge is a three-plate structure, the upper part of the first rotating arm is a support surface 214, and the support surface 214 is combined with the support plate 19 and the cover plate 15. That is, regardless of how the structure of the hinge itself changes, in the structural design of three axes or two axes, to meet the three-plate or two-plate structure design, only the structural characteristics of the first rotating arm need to be changed according to the above design, and no changes need to be made to other structural designs.

[0073] In the above embodiments, the linkage mode between the first movable seat and the first rotating arm is as follows:

[0074] Solution 1: As shown in Figures 7 - 18 and combined with Figure 25 As shown, a second arc chute 205 is provided on the first rotating arm 4, and a second arc slider 206 that is slidably matched with the second arc chute 205 is provided on the first movable seat 2; when the second arc chute 205 is provided on the inner side edge of the first movable seat 2, the arm span of the first rotating arm 4 is relatively short, and the whole hinge presents a structural design of a front-mounted semi-circular shaft. When the second arc chute 205 is provided on the outer side edge of the first movable seat 2, the arm span of the first rotating arm 4 is relatively long, and the whole hinge presents a structural design of a rear-mounted semi-circular shaft.

[0075] Solution 2: As shown in Figure 7 Figure - Figure 18 and combined with Figure 29 and Figure 33 As shown, a pin shaft 215 is provided on the first rotating arm 4, and a pin hole 216 that is rotationally matched with the pin shaft 215 is provided on the first movable seat 2; when the pin hole 216 is provided on the inner side edge of the first movable seat 2, the arm span of the first rotating arm 4 is relatively short, and the whole hinge presents a structural design of a front-mounted circular shaft. When the pin hole 216 is provided on the outer side edge of the first movable seat 2, the arm span of the first rotating arm 4 is relatively long, and the whole hinge presents a structural design of a rear-mounted circular shaft.

[0076] Solution 3: As shown in Figures 13 - 17As shown, based on the rear semi - circular shaft structure design and the rear circular shaft design of the above - mentioned Solution 1 and Solution 2, a curve groove 217 is provided on the first movable seat 2, a second sliding groove 218 is provided on the sliding seat 5, and a second sliding column 219 and a second curve slider 220 are provided on the support plate 19. The curve groove 217 is in sliding fit with the second curve slider 220, and the second sliding groove 218 is in sliding fit with the second sliding column 219, realizing the linkage cooperation between the first movable seat 2, the support plate 19 and the sliding seat 5.

[0077] In this embodiment, a third slider 221 is provided on the third rotating arm 20, and a third sliding groove 222 is provided on the first movable seat 2. The third sliding groove 222 is in sliding fit with the third slider 221 to realize the linkage cooperation between the third rotating arm 20 and the first movable seat 2. The linkage cooperation relationship between the third rotating arm 20 and the base 1 is divided into the following two types:

[0078] Design 1: Semi - circular main shaft structure. A third arc slider 223 is provided on the base 1, and a third arc sliding groove 224 is provided on the third rotating arm 20. The third arc slider 223 is in sliding fit with the third arc sliding groove 224 to realize the rotational cooperation between the base 1 and the third rotating arm 20.

[0079] Design 2: Whole - circular main shaft structure. A third rotating shaft 225 is provided on the base 1, and a third rotating hole 226 is provided on the third rotating arm 20. The third rotating shaft 225 is in sliding fit with the third rotating hole 226 to realize the rotational cooperation between the base 1 and the third rotating arm 20.

[0080] In the above - mentioned Embodiment 1 and Embodiment 2, the linkage between the first rotating arm 4 and the intermediate movable frame 3 is realized by providing a sliding - fit chute 207 and a sliding column 208. The chute 207 is provided on the intermediate movable frame 3, and the sliding column 208 is provided on the first rotating arm 4. Or, the chute 207 is provided on the first rotating arm 4, and the sliding column 208 is provided on the intermediate movable frame 3.

[0081] Regarding the above - mentioned Embodiment 1 and Embodiment 2, its synchronization mechanism realizes synchronization through the meshing of the gear 9 and the gear movable block 10. In addition to the above synchronization method, the following synchronization methods are also included:

[0082] Synchronization Solution 1: As Figure 35 shown, gear - rack synchronization, including a gear 301 and a rack 302 that mesh with each other to realize synchronization.

[0083] Synchronization Solution 2: As Figure 36As shown, the lever synchronization includes a lever 303, and a third sliding column 304 on the lever 303 slides in a third sliding groove 305 of the connecting body to achieve synchronization.

[0084] Synchronization solution 3: As Figure 37 shown, the sliding rod synchronization includes a sliding rod 306. A fourth sliding groove 308 on the sliding rod 306 cooperates with a fourth sliding column 307 on the connecting body to achieve synchronization.

[0085] Synchronization solution 4: As Figure 38 and Figure 39 shown, the movable block synchronization includes a first movable block 311, a second movable block 310 and a fourth connecting shaft 312. A straight tooth 313 is provided on the first movable block 311, a half tooth 314 is provided on the second movable block 310, a gear 315 is provided on the fourth connecting shaft 312, and the straight tooth 313 meshes with the half tooth 314 and the gear 315 respectively to achieve synchronization.

[0086] Synchronization solution 5: As Figure 40 shown, the screw synchronization includes a threaded block 316 and screws 317 arranged at both ends of the threaded block 316. Matching threads are provided on the screws 317 and the threaded block 316 to achieve synchronization.

[0087] Synchronization solution 6: As Figure 41 and Figure 42 shown, the commutation synchronization includes a commutation movable block 319 and a base 318 combined and connected therewith. A fifth rotating column 320 is provided on the base 318, a fifth rotating hole 321 that rotatably cooperates with the fifth rotating column 320 is provided on the commutation movable block 319, and the fifth rotating column 320 and the fifth rotating hole 321 rotatably cooperate to achieve commutation synchronization.

[0088] Synchronization solution 7: As Figure 43 shown, the worm and worm gear synchronization includes a worm gear 322 and two groups of symmetrically distributed worm shafts 323. Synchronization is achieved through threaded cooperation between the worm gear 322 and the worm shafts 323.

[0089] This embodiment is different from the traditional technology in that:

[0090] Synchronization is achieved through a gear set, multiple movable blocks assist in connection and positioning, the sliding column and the sliding groove slide in cooperation, and the bending mechanism is realized by combining the matching bending of the arc and the arc groove. The bending mechanism meets the design of multi-axis mechanisms such as two-axis or three-axis, and flexibly realizes the overall structural layout of two plates or three plates according to application terminals with different parameters. Moreover, the front and rear distribution of the round shaft or semi-circular shaft is flexible and variable.

[0091] The above are only the preferred embodiments of the present invention, and do not limit the scope of the present invention. Therefore, without departing from the design spirit of the present invention, any equivalent changes or decorations made by those of ordinary skill in the art to the structure, features, and principles described in the present invention shall fall within the protection scope of the patent application of the present invention.

Claims

1. A passive hinge based on the bending of a water droplet shape of a flexible display screen, characterized in that: It includes a base. On both sides of the base, there are symmetrically distributed first movable seats. On the base, there is an intermediate movable frame. On both sides of the intermediate movable frame, there are respectively first rotating arms linked thereto. The first rotating arms are rotatably connected to the first movable seats. Between the first rotating arms and the base, there are sliding seats for realizing the rotational connection. The sliding seats are slidably connected to the base; On the base, there is a first arc slider. On the sliding seat, there is a first arc chute slidably matched with the first arc slider; On one side of the sliding seat, there is a straight slider. On the first rotating arm, there is a straight chute. The straight slider is slidably matched in the straight chute; The first rotating arm and the intermediate movable frame are linked by a chute and a sliding column arranged in sliding fit.

2. The passive hinge based on the water droplet-shaped bending of a flexible display screen according to claim 1, wherein: On one side of the base, there is a synchronization mechanism and an auxiliary mechanism. The synchronization mechanism includes a connecting seat. The auxiliary mechanism includes symmetrically distributed connecting shafts. On the connecting seat, there is a second rotating arm. The second rotating arms are symmetrically distributed on both sides of the connecting seat. And between the base and the connecting seat, there are multiple groups of meshing gears and gear movable blocks. Between the base and the connecting seat, there are a positioning connecting plate and a clamping connecting plate for connection positioning.

3. The passive hinge based on the water droplet-shaped bending of a flexible display screen according to claim 2, wherein: On the connecting shaft, there is a cam connecting plate. The cam connecting plate and the cam on the second rotating arm are in concave-convex fit to realize the clamping self-locking at the 0-degree and 180-degree positions. On the connecting shaft, there is a compression spring for realizing the control of elastic force and torsion force.

4. The passive hinge based on the water droplet-shaped bending of a flexible display screen according to claim 2, wherein: On the second rotating arm, there is a second sliding block. On the first movable seat, there is a second sliding chute. The second sliding block is slidably matched in the second sliding chute to realize the linkage cooperation between the first movable seat and the second rotating arm.

5. The passive hinge based on the bending of the water droplet shape of the flexible display screen according to claim 1, wherein: Under the base, there is a rotating shaft cover. On both sides of the base, there are support plates to form a two-plate structure.

6. The passive hinge based on the water droplet-shaped bending of a flexible display screen according to claim 1, wherein: On the base, there is a cover plate. On the base, there are longitudinally distributed pins and springs. The up and down movement of the cover plate is supported by the pins and springs to realize a three-plate structure.

7. The passive hinge based on the water droplet-shaped bending of a flexible display screen according to claim 2, wherein: On the inner side of the second rotating arm, there is a connecting groove. On the gear movable block, there is a connecting column. The connecting groove and the connecting column cooperate to drive the gear movable block and the gears to rotate synchronously to realize the synchronous rotation from 0 degree to 180 degrees.

8. The passive hinge based on the water droplet-shaped bending of a flexible display screen according to claim 1, wherein: On the first rotating arm, there is a second arc chute. On the first movable seat, there is a second arc slider slidably matched with the second arc chute.

9. The passive hinge based on the water droplet-shaped bending of the flexible display screen according to claim 1 is characterized in that: A third rotating arm is provided between the first movable seat and the base, and the third rotating arm links the base and the first movable seat to form a three-axis structure.

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