Flexible screen bending device

Abstract

The invention discloses a flexible screen bending device which comprises a first middle frame, a second middle frame, a long-strip-shaped middle supporting plate arranged between the first middle frame and the second middle frame, a first transmission rod and a second transmission rod. The first transmission rod and the second transmission rod are installed on the middle supporting plate and reversely extend towards the outer side of the middle supporting plate. The side, away from the first transmission rod or the second transmission rod, of the movable door plate is rotationally connected with the first middle frame or the second middle frame, and the lower surface of the movable door plate is provided with a mounting block provided with a strip-shaped hole. The two side surfaces of the connecting rod parts of the first transmission rod and the second transmission rod are each provided with a protruding block, the first middle frame and the second middle frame are each provided with a sliding groove allowing one end of each connecting rod part to be embedded therein, and the two inner walls of each sliding groove are each provided with a guide groove extending in the sliding direction of the corresponding connecting rod part. The overall weight of the device is greatly reduced, the lightweight requirement of the electronic device is met, the user experience is improved, the flexible screen is prevented from being folded in the repeated opening and closing process of the device, and the service life of the flexible screen is prolonged.

Description

Technical Field

[0001] This invention relates to the field of electronic product technology, and in particular to a flexible screen bending device. Background Technology

[0002] Flexible screens, as an application technology of OLED, have seen significant development in recent years. Compared with rigid screens, flexible screens have significant advantages, such as being thinner and lighter, consuming less power, and thanks to their bendability and flexibility, their applications are becoming increasingly widespread. For example, the bendability of flexible screens can be used to mount smart mobile devices, enabling the switching between folded and unfolded screen states. Foldable screens can be divided into inward-folding and outward-folding screens, the difference being whether the screen is on the inside or outside after folding. Regardless of whether it folds inward or outward, the folding and opening of foldable screen devices is generally achieved through a hinge.

[0003] The inventor's prior patent applications, such as CN217061309U and CN217814518U, disclosed technical solutions for hinges that can be used in flexible folding screens. However, these hinges are all driven by mechanical structures. The damping mechanism is an essential component, and it has many constituent parts and relies on friction between the parts to generate resistance. This results in many parts and complicated assembly. In addition, the metal parts selected to meet the requirements of wear resistance are heavy, resulting in an overly heavy overall structure. In actual use, such as when used as a hinge for folding electronic devices, the user experience is poor and does not meet the requirements of lightweight electronic devices. Summary of the Invention

[0004] The main objective of this invention is to provide a flexible screen bending device that can be used as both an outward folding device and an inward folding device, and can also greatly reduce the overall weight of the device, thereby meeting the lightweight requirements of electronic devices and improving the user experience.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a flexible screen bending device, comprising: a first middle frame, a second middle frame, a middle support plate arranged in a long strip between the first middle frame and the second middle frame, and a first transmission rod and a second transmission rod installed on the middle support plate and extending in the opposite direction to the outside of the middle support plate, wherein one end of each of the first transmission rod and the second transmission rod is rotatably installed on the middle support plate, and the other end of each is connected to the first middle frame or the second middle frame, and the flexible screen is covered and applied to the upper or lower surface of the first middle frame and the second middle frame, characterized in that: a first side support plate and a second side support plate are respectively provided between the middle support plate and the first middle frame and the second middle frame, and a plurality of connecting members are spaced apart along their length direction on the upper surface of each of the first side support plate and the second side support plate, and each of the connecting members is rotatably connected to the middle support plate and the first middle frame or the second middle frame; The first transmission rod and the second transmission rod each further include: a gear end, a connecting rod part, and a transmission part connected in sequence. The gear end with teeth is rotatably mounted on a first base or a second base provided on the upper surface of the middle support plate. The connecting rod part is slidably connected to the first middle frame or the second middle frame. A transmission gear that meshes with the gear end is rotatably mounted on the first base and the second base on the side opposite to the connecting rod part of the gear end. The transmission gear is connected to the output shaft of an electric motor provided on the outside of the first base or the second base. The transmission part is connected to a movable door panel provided on both sides of the middle support plate. The side of the movable door panel away from the first transmission rod or the second transmission rod is rotatably connected to the first middle frame or the second middle frame. The lower surface of the movable door panel has a mounting block with a strip-shaped hole. The transmission part of the first transmission rod and the second transmission rod is connected to the strip-shaped hole by a pin. The pin that rotatably engages with the transmission part is slidably engaged with the inner wall of the strip-shaped hole. Each of the first and second transmission rods has a protrusion on both side surfaces of its connecting rod portion. The first and second middle frames are provided with a sliding groove for one end of the connecting rod portion to be inserted. Each of the two inner walls of the sliding groove has a guide groove extending along the sliding direction of the connecting rod portion, and the protrusion is correspondingly inserted into the guide groove.

[0006] The following are further improvements to the above technical solution: 1. In the above scheme, the gear ends of the first transmission rod and the second transmission rod are mounted on a third pin, and the two ends of the third pin connecting the two mounting plates are rotatably connected to the corresponding mounting plates.

[0007] 2. In the above solution, a mounting base is provided on the upper surface of the middle support plate. A first linkage rod and a second linkage rod are rotatably mounted on the mounting base. One end of each of the symmetrically arranged first and second linkage rods is rotatably mounted on the mounting base, and the other end of each extends away from the mounting base and is slidably connected to the first or second middle frame. The ends of the first and second linkage rods that are close to each other are connected by a sliding block. The sliding block is slidably mounted on the middle support plate and can reciprocate in a direction perpendicular to the length of the first and second linkage rods. The sliding block and the first linkage rod are slidably connected to the first sliding part through a mutually cooperating first track, and the sliding block and the second linkage rod are slidably connected to the second sliding part through a mutually cooperating second track. The symmetrically arranged first and second tracks are both arc-shaped tracks that deviate from the length direction of the first and second linkage rods.

[0008] 3. In the above scheme, the lower surface of the first linkage rod 31 and the second linkage rod 32 at the end connected to the sliding block 4 and the upper surface of the sliding block 4 are both arc-shaped surfaces.

[0009] 4. In the above solution, the mounting base further includes: a first mounting plate and a second mounting plate arranged face-to-face at intervals; the sliding block is movable between the first mounting plate and the second mounting plate; a first magnet extending along its moving direction is embedded in the sliding block; a second magnet that can be attracted and cooperate with the first magnet is mounted on the first mounting plate and the second mounting plate respectively; when the sliding block is in contact with the first mounting plate, the angle between the first linkage rod and the second linkage rod is at its maximum and the second magnet on the first mounting plate is attracted to the first magnet; when the sliding block is in contact with the second mounting plate, the angle between the first linkage rod and the second linkage rod is at its minimum and the second magnet on the second mounting plate is attracted to the first magnet.

[0010] 5. In the above scheme, both second magnets 92 are set as electromagnets, which are convenient for electromechanical control.

[0011] 6. In the above scheme, the end faces of the first magnet 91 are flush with the side surface of the sliding block 4.

[0012] 7. In the above scheme, a guide hole 71 is provided on the upper surface of the middle support plate 1 between the first mounting plate 201 and the second mounting plate 202, and a guide protrusion 72 embedded in the guide hole 7 is provided on the lower surface of the sliding block 4, and the length of the guide protrusion 72 is less than the length of the guide hole 71.

[0013] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. The flexible screen bending device of the present invention comprises a flexible screen covering and attached to the upper or lower surface of a first middle frame and a second middle frame. A first side support plate and a second side support plate are respectively provided between the middle support plate and the first middle frame and the second middle frame. A plurality of connecting members are spaced apart along their length on the upper surface of each of the first side support plate and the second side support plate. Each connecting member is rotatably connected to the middle support plate and the first or second middle frame. The first transmission rod and the second transmission rod each include: a gear end, a connecting rod part and a transmission part connected in sequence. The transmission part is connected to a movable part provided on both sides of the middle support plate. The movable door panel is connected to the first or second middle frame on the side away from the first or second transmission rod. The lower surface of the movable door panel has a mounting block with a slotted hole. The transmission parts of the first and second transmission rods are connected to the slotted hole via a pin. The pin, which rotates with the transmission parts, slides against the inner wall of the slotted hole. This design allows it to function as both an outward-folding and inward-folding device. In both scenarios, it effectively compensates for changes in the length of the support area required by the flexible screen during repeated opening and closing, ensuring the flexible screen remains stable. The flexible screen is not stretched when folded and receives good support when unfolded, thus reducing deformation during long-term use and extending the device's lifespan. It also provides a larger bending radius for the folded flexible screen when the device is in an inward-folded state, further preventing creases from forming during repeated opening and closing, and extending its lifespan. Furthermore, the gear ends of the first and second transmission rods, with teeth, are rotatably mounted on a first or second base located on the upper surface of the middle support plate. The connecting rod is slidably connected to the first or second middle frame. A transmission gear, meshing with the gear end, is rotatably mounted on the first and second bases on the side opposite to the connecting rod end of the gear end. This transmission gear is connected to the output shaft of an electrically controlled motor located outside the first or second base. The motor replaces the mechanical rotating shaft mechanism with damping components to drive the rotation of the two rotating middle frames in the device. This significantly reduces the number of parts and allows the use of lightweight parts instead of the originally required wear-resistant metal parts, thereby greatly reducing the overall weight of the device, meeting the lightweight requirements of electronic devices, and improving the user experience.

[0014] 2. The flexible screen bending device of the present invention comprises a first linkage rod and a second linkage rod symmetrically arranged, one end of which is rotatably mounted on a mounting base on the upper surface of a middle support plate. The other end of each linkage rod extends away from the mounting base and is slidably connected to a first or second middle frame. The ends of the first and second linkage rods that are close to each other are connected by a sliding block. The sliding block is slidably mounted on the middle support plate and can reciprocate in a direction perpendicular to the length of the first and second linkage rods. The sliding block is slidably connected to the first linkage rod via a first track and a first sliding part, and to the second linkage rod via a second track and a second sliding part. The symmetrically arranged first and second tracks are both arc-shaped tracks deviating from the length direction of the first and second linkage rods. The sliding block enables the transmission of motion between the first and second linkage rods. A simple structure achieves consistency in the rotation angle and path of the first and second linkage rods, thereby improving the connection with the first and second middle frames. The first and second middle frames, connected by the linkage rod and the second linkage rod, maintain consistent and stable paths throughout repeated opening and closing. Furthermore, the mounting base includes a first mounting plate and a second mounting plate spaced face-to-face. A sliding block can move between the first and second mounting plates. A first magnet extending along its moving direction is embedded in the sliding block. Each of the first and second mounting plates has a second magnet that can attract and engage with the first magnet. When the sliding block is in contact with the first mounting plate, the angle between the first and second linkage rods is at its maximum, and the second magnet on the first mounting plate engages with the first magnet. When the sliding block is in contact with the second mounting plate, the angle between the first and second linkage rods is at its minimum, and the second magnet on the second mounting plate engages with the first magnet. This design can lock the first and second middle frames connected to the linkage rods in their folded and unfolded states, preventing unnecessary deflection of the first and second middle frames under external force during use and improving the user experience. Attached Figure Description

[0015] Appendix Figure 1 This is a schematic diagram of the overall structure of the flexible screen bending device of the present invention; Appendix Figure 2 For the appendix Figure 1 A schematic cross-sectional view along the middle AA section; Appendix Figure 3 This is a partial structural diagram of the flexible screen bending device of the present invention. Figure 1 ; Appendix Figure 4 For the appendix Figure 3 Enlarged view of point B in the middle; Appendix Figure 5 For the appendix Figure 3 Enlarged view of point C in the middle; Appendix Figure 6This is a partial structural diagram of the flexible screen bending device of the present invention. Figure 2 ; Appendix Figure 7 This is a partial structural diagram of the flexible screen bending device of the present invention. Figure 3 ; Appendix Figure 8 This is a partially disassembled schematic diagram of the flexible screen bending device of the present invention; Appendix Figure 9 This is a partial structural diagram of the flexible screen bending device of the present invention. Figure 4 ; Appendix Figure 10 This is an exploded view of the structure of Embodiment 1 of the flexible screen bending device of the present invention in a flattened state; Appendix Figure 11 This is an exploded view of the structure of Embodiment 2 of the flexible screen bending device of the present invention in a flattened state; Appendix Figure 12 This is a schematic diagram of the flexible screen bending device of the present invention in a folded state; Appendix Figure 13 This is a cross-sectional view of the flexible screen bending device of the present invention in a folded state.

[0016] In the attached figures above: 100, First middle frame; 200, Second middle frame; 300, Flexible screen; 1, Middle support plate; 2, Mounting base; 201, First mounting plate; 202, Second mounting plate; 31, First linkage rod; 32, Second linkage rod; 311, Arc-shaped connecting groove; 4, Sliding block; 51, First track; 52, Second track; 61, First sliding part; 62, Second sliding part; 71, Guide hole; 72, Guide protrusion; 81, First arc-shaped groove; 82, Second arc-shaped groove; 91, First magnet; 92, Second magnet; 93, Mounting through hole; 10, First transmission rod; 11, Second transmission rod; 111, Gear end; 112, Connecting rod part; 113, Transmission part; 12, Transmission gear. ; 13. Electric motor; 141. First base; 142. Second base; 143. Mounting plate; 15. First side support plate; 16. Second side support plate; 17. Connecting piece; 171. Main body; 172. First arc-shaped part; 173. Second arc-shaped part; 18. Connecting protrusion; 181. Arc-shaped connecting groove; 19. Fan-shaped protrusion; 20. Protrusion; 21. Slide groove; 211. Guide groove; 22. Movable door panel; 221. Arc-shaped slider; 222. Arc-shaped slide groove; 23. Strip hole; 24. Mounting block; 25. Pin; 26. Second movable door panel; 261. Arc-shaped connecting block; 27. Connecting block; 28. Second strip hole; 29. ​​Protruding ring; 30. Second pin; 33. Fixing plate. Detailed Implementation

[0017] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0018] Example 1: A flexible screen bending device includes: a first middle frame 100, a second middle frame 200, a middle support plate 1 arranged in a long strip between the first middle frame 100 and the second middle frame 200, and a first transmission rod 10 and a second transmission rod 11 mounted on the middle support plate 1 and extending outward from the middle support plate 1, respectively. One end of each of the first transmission rod 10 and the second transmission rod 11 is rotatably mounted on the middle support plate 1, and the other end of each is connected to the first middle frame 100 or the second middle frame 200. The flexible screen 300 covers and adheres to the upper surface of the first middle frame 100 and the second middle frame 200, such as... Figure 10 The diagram shown is an exploded view of the structure in the flattened state of this embodiment. A first side support plate 15 and a second side support plate 16 are respectively provided between the middle support plate 1 and the first middle frame 100 and the second middle frame 200. A plurality of connecting pieces 17 are provided at intervals along their length on the upper surface of the first side support plate 15 and the second side support plate 16. Each of the connecting pieces 17 is rotatably connected to the middle support plate 1 and the first middle frame 100 or the second middle frame 200. Both the first transmission rod 10 and the second transmission rod 11 further include: a gear end 111, a connecting rod portion 112, and a transmission portion 113 connected in sequence. The gear end 111, having teeth, is rotatably mounted on a first base 141 or a second base 142 disposed on the upper surface of the middle support plate 1. The connecting rod portion 112 is slidably connected to the first middle frame 100 or the second middle frame 200. A transmission gear 12, meshing with the gear end 111, is rotatably mounted on the first base 141 and the second base 142 on the side opposite to the connecting rod portion 112 of the gear end 111. The transmission gear 12 is connected to a transmission gear disposed on the first base 141. The output shaft of the electric motor 13 on the outer side of the second base 142 is connected. The transmission part 113 is connected to a movable door panel 22 disposed on both sides of the middle support plate 1. The side of the movable door panel 22 away from the first transmission rod 10 or the second transmission rod 11 is rotatably connected to the first middle frame 100 or the second middle frame 200. The lower surface of the movable door panel 22 has a mounting block 24 with a strip hole 23. The transmission part 113 of the first transmission rod 10 and the second transmission rod 11 is connected to the strip hole 23 by a pin 25. The pin 25, which is rotatably engaged with the transmission part 113, is slidably engaged with the inner wall of the strip hole 23. Figure 12 The diagram shown is a structural schematic of this embodiment in the folded state (the flexible screen is not shown).

[0019] A mounting base 2 is provided on the upper surface of the aforementioned support plate 1. A first linkage rod 31 and a second linkage rod 32 are rotatably mounted on the mounting base 2. One end of each of the symmetrically arranged first linkage rod 31 and second linkage rod 32 is rotatably mounted on the mounting base 2, and the other end of each extends away from the mounting base 2 and is slidably connected to the first middle frame 100 or the second middle frame 200. The ends of the first linkage rod 31 and the second linkage rod 32 that are close to each other are connected by a sliding block 4. The sliding block 4 is slidably mounted on the support plate 1 and can reciprocate in a direction perpendicular to the length of the first linkage rod 31 and the second linkage rod 32. The sliding block 4 and the first linkage rod 31 are slidably connected to the first sliding part 61 through a mutually cooperating first track 51, and the sliding block 4 and the second linkage rod 32 are slidably connected to the second sliding part 62 through a mutually cooperating second track 52. The symmetrically arranged first track 51 and second track 52 are both arc-shaped tracks that deviate from the length direction of the first linkage rod 31 and the second linkage rod 32.

[0020] The aforementioned mounting base 2 is disposed between the first base 141 and the second base 142.

[0021] The aforementioned mounting base 2 further includes: a first mounting plate 201 and a second mounting plate 202 arranged face-to-face. The sliding block 4 is movable between the first mounting plate 201 and the second mounting plate 202. A first magnet 91 extending along its moving direction is embedded in the sliding block 4. A second magnet 92 that can be attracted and cooperate with the first magnet 91 is installed on the first mounting plate 201 and the second mounting plate 202 respectively. When the sliding block 4 is in contact with the first mounting plate 201, the included angle between the first linkage rod 31 and the second linkage rod 32 is at most 180° and the second magnet 92 on the first mounting plate 201 is attracted to the first magnet 91. When the sliding block 4 is in contact with the second mounting plate 202, the included angle between the first linkage rod 31 and the second linkage rod 32 is at least 0° and the second magnet 92 on the second mounting plate 202 is attracted to the first magnet 91.

[0022] Both of the aforementioned second magnets 92 are configured as electromagnets, which facilitates electromechanical control.

[0023] The end faces of the first magnet 91 are flush with the side surfaces of the sliding block 4.

[0024] Each of the first mounting plate 201 and the second mounting plate 202 has a mounting through hole 93 coaxially arranged with the first magnet 91, and the two second magnets 92 are each embedded in the corresponding mounting through hole 93.

[0025] One end of the second magnet 92 is inserted into the mounting hole 93 at the end away from the first magnet 91.

[0026] The first track 51 and the second track 52 are arc-shaped grooves formed on the upper surface of the sliding block 4. The first sliding part 61 and the second sliding part 62 are arc-shaped protrusions formed on the lower surface of one end of the first linkage rod 31 and the second linkage rod 32 and slidably embedded in the arc-shaped groove.

[0027] The lower surface of the first linkage rod 31 and the second linkage rod 32 at the end connected to the sliding block 4 and the upper surface of the sliding block 4 are both arc-shaped surfaces.

[0028] The upper surface of the support plate 1 and the space between the first mounting plate 201 and the second mounting plate 202 is provided with a guide hole 71. The lower surface of the sliding block 4 is provided with a guide protrusion 72 embedded in the guide hole 7, and the length of the guide protrusion 72 is less than the length of the guide hole 71.

[0029] The first mounting plate 201 and the second mounting plate 202 are respectively provided with a first arc-shaped groove 81 and a second arc-shaped groove 82 on their opposing surfaces. The first linkage rod 31 has one side embedded in a first arc-shaped groove 81 and rotates in contact with the inner wall of the first arc-shaped groove 81. The second linkage rod 32 has one side embedded in a second arc-shaped groove 82 and rotates in contact with the inner wall of the second arc-shaped groove 82.

[0030] Both the first arc-shaped groove 81 and the second arc-shaped groove 82 mentioned above are semi-circular grooves.

[0031] Each of the two movable door panels 22 is provided with a second movable door panel 26 between itself and the middle support plate 1. Each second movable door panel 26 has a connecting block 27 on its lower surface near the movable door panel 22, one end of which is embedded in the movable door panel 22. The connecting block 27 has a second strip hole 28. The second strip hole 28 is connected to the protruding ring 29 on the lower surface of the movable door panel 22 by a second pin 30. The second pin 30, which is rotatably engaged with the protruding ring 29, is slidably engaged with the inner wall of the second strip hole 28. The other side of the second movable door panel 26 is rotatably connected to the first transmission rod 10, the second transmission rod 11 or the first linkage rod 31, the second linkage rod 32.

[0032] When the above is in the unfolded state, the strip hole 23 extends in the horizontal direction, the second strip hole 28 forms an acute angle with the horizontal direction, and the end of the second strip hole 28 away from the middle support plate 1 is higher than its other end.

[0033] Two connecting blocks 27 are provided on the second movable door panel 26, located at its two ends respectively.

[0034] An arc-shaped connecting block 261 is provided on the lower surface of the second movable door panel 26 near the movable door panel 22. The first linkage rod 31 and the second linkage rod 32 are provided with arc-shaped connecting grooves 311 for the arc-shaped connecting block 261 to be inserted. The arc-shaped connecting block 261 slides in cooperation with the inner wall of the arc-shaped connecting groove 311.

[0035] A fixing plate 33 is fixedly installed between the two second movable door panels 26 and directly above the middle support plate 1.

[0036] The aforementioned movable door panel 22 is connected to the first middle frame 100 and the second middle frame 200 through at least one set of arc-shaped sliders 221 and arc-shaped grooves 222.

[0037] Example 2: A flexible screen bending device, comprising: a first middle frame 100, a second middle frame 200, a middle support plate 1 arranged in a long strip between the first middle frame 100 and the second middle frame 200, and a first transmission rod 10 and a second transmission rod 11 mounted on the middle support plate 1 and extending outward from the middle support plate 1, respectively. One end of each of the first transmission rod 10 and the second transmission rod 11 is rotatably mounted on the middle support plate 1, and the other end of each is connected to the first middle frame 100 or the second middle frame 200. The flexible screen 300 covers and adheres to the lower surface of the first middle frame 100 and the second middle frame 200, as shown below. Figure 11 The diagram shown is an exploded view of the structure in the flattened state of this embodiment. A first side support plate 15 and a second side support plate 16 are respectively provided between the middle support plate 1 and the first middle frame 100 and the second middle frame 200. A plurality of connecting pieces 17 are provided at intervals along their length on the upper surface of the first side support plate 15 and the second side support plate 16. Each of the connecting pieces 17 is rotatably connected to the middle support plate 1 and the first middle frame 100 or the second middle frame 200. Both the first transmission rod 10 and the second transmission rod 11 further include: a gear end 111, a connecting rod portion 112, and a transmission portion 113 connected in sequence. The gear end 111, having teeth, is rotatably mounted on a first base 141 or a second base 142 disposed on the upper surface of the middle support plate 1. The connecting rod portion 112 is slidably connected to the first middle frame 100 or the second middle frame 200. A transmission gear 12, meshing with the gear end 111, is rotatably mounted on the first base 141 and the second base 142 on the side opposite to the connecting rod portion 112 of the gear end 111. The transmission gear 12 is connected to a transmission gear disposed on the first base 141. The output shaft of the electric motor 13 on the outside of the first or second base 142 is connected. The transmission part 113 is connected to a movable door panel 22 disposed on both sides of the middle support plate 1. The side of the movable door panel 22 away from the first transmission rod 10 or the second transmission rod 11 is rotatably connected to the first middle frame 100 or the second middle frame 200. The lower surface of the movable door panel 22 has a mounting block 24 with a strip hole 23. The transmission part 113 of the first transmission rod 10 and the second transmission rod 11 is connected to the strip hole 23 by a pin 25. The pin 25, which is rotatably engaged with the transmission part 113, is slidably engaged with the inner wall of the strip hole 23.

[0038] The aforementioned connector 17 includes: a main body 171 located in the middle of the first side support plate 15 or the second side support plate 16, and a first arc-shaped portion 172 and a second arc-shaped portion 173 extending to both sides of the first side support plate 15 or the second side support plate 16, respectively. The first middle frame 100, the second middle frame 200, and the middle support plate 1 are each provided with a plurality of connecting protrusions 18. Each connecting protrusion 18 is provided with an arc-shaped connecting groove 181 for the first arc-shaped portion 172 or the second arc-shaped portion 173 to be inserted. The first arc-shaped portion 172 of the connector 17 is inserted into the arc-shaped connecting groove 181 in the connecting protrusion 18 on the middle support plate 1 and slides in cooperation with the inner wall of the arc-shaped connecting groove 181. The second arc-shaped portion 173 of the connector 17 is inserted into the arc-shaped connecting groove 181 in the connecting protrusion 18 on the first side support plate 15 or the second side support plate 16 and slides in cooperation with the inner wall of the arc-shaped connecting groove 181.

[0039] Each of the first transmission rod 10 and the second transmission rod 11 has a protrusion 20 on both side surfaces of its connecting rod portion 112. The first middle frame 100 and the second middle frame 200 are provided with a sliding groove 21 for one end of the connecting rod portion 112 to be inserted. Each of the two inner walls of the sliding groove 21 has a guide groove 211 extending along the sliding direction of the connecting rod portion 112, and the protrusion 20 is correspondingly inserted into the guide groove 211.

[0040] Each of the first side support plate 15, the second side support plate 16 and the middle support plate 1 is provided with a fan-shaped protrusion 19 at both ends. When in the folded state, the end faces of the three fan-shaped protrusions 19 located at the same end fit together in sequence.

[0041] The model number of the aforementioned electric motor 13 is MD004004.

[0042] The first base 141 or the second base 142 mentioned above further includes: two mounting plates 143 arranged face-to-face and spaced apart, and the gear ends 111 of the first transmission rod 11 and the second transmission rod 12 and the transmission gear 12 are all arranged between the two mounting plates 143.

[0043] The output shaft of the aforementioned electric motor 13 passes through a mounting plate 143 and is connected to the transmission gear 12.

[0044] The gear ends 111 of the first transmission rod 11 and the second transmission rod 12 are fitted onto a third pin, and the two ends of the third pin connecting the two mounting plates 143 are rotatably connected to the corresponding mounting plate 143.

[0045] The first transmission rod 11 and the second transmission rod 12 extend in opposite directions in a direction perpendicular to the middle support plate 1.

[0046] The output shafts of the two electric motors 13 mentioned above are arranged opposite each other.

[0047] The working principle of this invention is as follows: The motor drives the transmission gear on it to rotate, which in turn drives the gear end that meshes with the transmission gear and the transmission rod as a whole to rotate, ultimately driving the first middle frame and the second middle frame connected to the transmission rod to rotate; Using electronic control, it can automatically control multi-angle rotation, unfolding, and closing. It also facilitates integration with widely used smart voice control terminals (such as Tmall Genie and Xiao Ai), improving the intelligence level of the flexible screen bending device.

[0048] The flexible screen bending device of this invention can be used as both an outward folding device and an inward folding device. In both inward and outward folding scenarios, it can effectively compensate for the change in the length of the support area required by the flexible screen during repeated opening and closing of the device. This ensures that the flexible screen is not stretched in the folded state and is well supported in the unfolded state, thereby reducing the deformation of the flexible screen during long-term use and extending the service life of the device. It can also provide a larger bending radius for the flexible screen in the folded state when the device is in the inward folding state, further preventing creases from forming on the flexible screen during repeated opening and closing of the device and extending its service life. Furthermore, replacing the mechanical shaft mechanism with a damping component with a motor to drive the rotation of the two rotating frames in the equipment can significantly reduce the number of parts and allow the use of lightweight parts instead of the originally required wear-resistant metal parts, thereby greatly reducing the overall weight of the equipment, meeting the lightweight requirements of electronic devices and improving the user experience. Furthermore, it achieves motion transmission between the first and second linkage rods through a sliding block, and realizes the consistency of the rotation angle and path of the first and second linkage rods with a simple structure, thereby improving the consistency and stability of the path of the first and second middle frames connected to the first and second linkage rods during the entire process of repeated opening and closing. Furthermore, the folded and unfolded states of the first and second middle frames connected to the linkage rod can be locked to prevent unnecessary deflection of the first and second middle frames when subjected to external forces during use, thus improving the user experience.

[0049] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A flexible screen bending device, comprising: A first middle frame (100), a second middle frame (200), a middle support plate (1) arranged in a long strip between the first middle frame (100) and the second middle frame (200), and a first transmission rod (10) and a second transmission rod (11) mounted on the middle support plate (1) and extending outward from the middle support plate (1), respectively. One end of each of the first transmission rod (10) and the second transmission rod (11) is rotatably mounted on the middle support plate (1), and the other end of each is connected to the first middle frame (100) or the second middle frame (200). The flexible screen (300) covers and applies the screen. The upper or lower surfaces of the first middle frame (100) and the second middle frame (200) are characterized in that: a first side support plate (15) and a second side support plate (16) are respectively provided between the middle support plate (1) and the first middle frame (100) and the second middle frame (200), and a plurality of connecting pieces (17) are provided at intervals along their length on the upper surface of the first side support plate (15) and the second side support plate (16), and each of the connecting pieces (17) is rotatably connected to the middle support plate (1) and the first middle frame (100) or the second middle frame (200); The first transmission rod (10) and the second transmission rod (11) each further include: a gear end (111), a connecting rod portion (112), and a transmission portion (113) connected in sequence. The gear end (111), which has teeth, is rotatably mounted on a first base (141) or a second base (142) provided on the upper surface of the middle support plate (1). The connecting rod portion (112) is slidably connected to the first middle frame (100) or the second middle frame (200). A transmission gear (12) that meshes with the gear end (111) is rotatably mounted on the first base (141) and the second base (142) on the side opposite to the connecting rod portion (112) of the gear end (111). The transmission gear (12) is connected to a transmission gear provided on the first base (141). The output shaft of the electric motor (13) on the outside of the second base (142) is connected. The transmission part (113) is connected to a movable door panel (22) on both sides of the middle support plate (1). The movable door panel (22) is rotatably connected to the first middle frame (100) or the second middle frame (200) on the side away from the first transmission rod (10) or the second transmission rod (11). The lower surface of the movable door panel (22) has a mounting block (24) with a strip hole (23). The transmission part (113) of the first transmission rod (10) and the second transmission rod (11) is connected to the strip hole (23) by a pin (25). The pin (25) that is rotatably engaged with the transmission part (113) is slidably engaged with the inner wall of the strip hole (23). Each of the first transmission rod (10) and the second transmission rod (11) has a protrusion (20) on both side surfaces of the connecting rod portion (112). The first middle frame (100) and the second middle frame (200) are provided with a sliding groove (21) for one end of the connecting rod portion (112) to be inserted. Each of the two inner walls of the sliding groove (21) has a guide groove (211) extending along the sliding direction of the connecting rod portion (112). The protrusion (20) is correspondingly inserted into the guide groove (211).

2. The flexible screen bending device according to claim 1, characterized in that: The gear ends (111) of the first transmission rod (11) and the second transmission rod (12) are fitted onto a third pin, and the two ends of the third pin connecting the two mounting plates (143) are rotatably connected to the corresponding mounting plate (143).

3. The flexible screen bending device according to claim 1, characterized in that: A mounting base (2) is provided on the upper surface of the middle support plate (1). A first linkage rod (31) and a second linkage rod (32) are rotatably mounted on the mounting base (2). One end of each of the symmetrically arranged first linkage rods (31) and second linkage rods (32) is rotatably mounted on the mounting base (2), and the other end of each extends away from the mounting base (2) and is slidably connected to the first middle frame (100) or the second middle frame (200). The ends of the first linkage rods (31) and second linkage rods (32) that are close to each other are connected by a sliding block (4). The sliding block (4) is slidably connected. Installed on the middle support plate (1) and can reciprocate in a direction perpendicular to the length of the first linkage rod (31) and the second linkage rod (32), the sliding block (4) is slidably connected to the first linkage rod (31) through the first track (51) and the first sliding part (61) that cooperate with each other, and the sliding block (4) is slidably connected to the second linkage rod (32) through the second track (52) and the second sliding part (62) that cooperate with each other. The first track (51) and the second track (52) that are symmetrically arranged are both arc-shaped tracks that deviate from the length direction of the first linkage rod (31) and the second linkage rod (32).

4. The flexible screen bending device according to claim 3, characterized in that: The lower surface of the first linkage rod 31 and the second linkage rod 32 at the end connected to the sliding block 4, and the upper surface of the sliding block 4 are both arc-shaped surfaces.

5. The flexible screen bending device according to claim 3, characterized in that: The mounting base (2) further includes: a first mounting plate (201) and a second mounting plate (202) arranged face-to-face. The sliding block (4) can move between the first mounting plate (201) and the second mounting plate (202). A first magnet (91) extending along its moving direction is embedded in the sliding block (4). A second magnet (92) that can be attracted and cooperate with the first magnet (91) is installed on the first mounting plate (201) and the second mounting plate (202). When the sliding block (4) is in contact with the first mounting plate (201), the angle between the first linkage rod (31) and the second linkage rod (32) is the largest and the second magnet (92) on the first mounting plate (201) is attracted to the first magnet (91). When the sliding block (4) is in contact with the second mounting plate (202), the angle between the first linkage rod (31) and the second linkage rod (32) is the smallest and the second magnet (92) on the second mounting plate (202) is attracted to the first magnet (91).

6. The flexible screen bending device according to claim 5, characterized in that: Both of the second magnets 92 are configured as electromagnets, which facilitates electromechanical control.

7. The flexible screen bending device according to claim 5, characterized in that: The end faces of the first magnet 91 are flush with the side surfaces of the sliding block 4.

8. The flexible screen bending device according to claim 5, characterized in that: A guide hole 71 is provided on the upper surface of the middle support plate 1 and between the first mounting plate 201 and the second mounting plate 202. A guide protrusion 72 is provided on the lower surface of the sliding block 4 and is embedded in the guide hole 71. The length of the guide protrusion 72 is less than the length of the guide hole 71.

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