CN118775409A

CN118775409A - Rotating shaft device, folding shell and electronic equipment

Info

Publication number: CN118775409A
Application number: CN202310374041.6A
Authority: CN
Inventors: 石林; 付松林; 侯欢; 梁子豪; 徐雪杰
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2024-10-15

Abstract

The invention provides a rotating shaft device, which comprises a base, a pair of connecting shafts, a first connecting rod piece, a second connecting rod piece and a linkage assembly, wherein the connecting shafts are respectively arranged on two opposite sides of the base; the first connecting rod piece and the second connecting rod piece are respectively connected to a pair of connecting shafts; the linkage piece is arranged between the first connecting rod piece and the second connecting rod piece, and the linkage assembly comprises a first sliding piece and a second sliding piece; at least one of the first sliding piece and the second sliding piece is provided with an elastic part, the elastic part is positioned between the first sliding piece and the second sliding piece, the first connecting rod piece is respectively connected with the first sliding piece and the second sliding piece in a matched manner through a spiral surface, the second connecting rod piece is respectively connected with the first sliding piece and the second sliding piece in a matched manner through the spiral surface, and the elastic part is used for propping against the first sliding piece and the second sliding piece so that the first sliding piece and the second sliding piece respectively prop against the first connecting rod piece and the second connecting rod piece. The invention also provides a folding shell and electronic equipment.

Description

Rotating shaft device, folding shell and electronic equipment

Technical Field

The invention relates to the field of electronic equipment, in particular to a rotating shaft device for supporting a flexible screen, a folding shell provided with the rotating shaft device and electronic equipment provided with the folding shell.

Background

With the development of display equipment, a bendable flexible display screen is developed, and folding screen equipment with the bendable flexible display screen is increasingly popular with people due to the unique modeling and diversified functions of the folding screen equipment. The flexible display screen of the folding screen device in the related art is generally supported by a rotating shaft device. The existing rotating shaft device is generally folded or flattened synchronously through gears, however, the gears occupy a large volume of the rotating shaft device, and the miniaturization development of the rotating shaft device is not facilitated.

Disclosure of Invention

The application provides a rotating shaft device, a folding shell provided with the rotating shaft device and electronic equipment provided with the folding shell.

The application provides a rotating shaft device, which comprises a base, a pair of connecting shafts, a first connecting rod piece, a second connecting rod piece and a linkage assembly, wherein the connecting shafts are respectively arranged on two opposite sides of the base; the first connecting rod piece is connected to one connecting shaft, and the second connecting rod piece is connected to the other connecting shaft; the linkage piece is arranged between the first connecting rod piece and the second connecting rod piece, the linkage assembly comprises a first sliding piece and a second sliding piece, the first sliding piece and the second sliding piece are connected to the pair of connecting shafts in a sliding manner, at least one of the first sliding piece and the second sliding piece is provided with an elastic part, and the elastic part is positioned between the first sliding piece and the second sliding piece; the first connecting rod piece is respectively connected with the first sliding piece and the second sliding piece in a matched manner through spiral surfaces, the second connecting rod piece is respectively connected with the first sliding piece and the second sliding piece in a matched manner through spiral surfaces, and the elastic part is used for pushing the first sliding piece and the second sliding piece so that the first sliding piece and the second sliding piece are respectively pushed against the first connecting rod piece and the second connecting rod piece; when the first connecting rod piece and/or the second connecting rod piece rotate around the axis of the corresponding connecting shaft, the first sliding piece and the second sliding piece slide along the axial direction of the connecting shaft so as to drive the first connecting rod piece and the second connecting rod piece to synchronously rotate relative to the base.

The application also provides a folding shell which comprises a rotating shaft device and two frame bodies, wherein the rotating shaft device is positioned between the two frame bodies, and two opposite sides of the rotating shaft device are respectively connected with the two frame bodies.

The application also provides electronic equipment, which comprises a flexible screen, two frame bodies and a rotating shaft device, wherein the rotating shaft device is positioned between the two frame bodies, the opposite sides of the rotating shaft device are respectively connected with the two frame bodies, and the flexible screen is connected with the two frame bodies and the rotating shaft device.

The first connecting rod piece and the second connecting rod piece of the rotating shaft device are respectively and rotatably connected to the opposite sides of the base, the first connecting rod piece and the first rotating mechanism are in matched sliding connection with the sliding rail through the sliding groove, the second connecting rod piece and the second rotating mechanism are in matched sliding connection with the sliding rail through the sliding groove, the first rotating mechanism and the second rotating mechanism are respectively and rotatably connected to the opposite sides of the base, the first connecting rod piece is respectively and rotatably connected with the first sliding piece and the second sliding piece through the spiral surface, and the second connecting rod piece is respectively and cooperatively connected with the first sliding piece and the second sliding piece through the spiral surface; when the first connecting rod piece or the second connecting rod piece rotates relative to the base, the linkage assembly between the first connecting rod piece and the second connecting rod piece moves along the axial direction of the connecting shaft so as to drive the first connecting rod piece and the second connecting rod piece to synchronously rotate relative to the base, so that the first side supporting piece and the second side supporting piece of the rotating shaft device can be synchronously folded or synchronously unfolded; the rotating shaft device can realize synchronous folding or flattening without adopting gears, and the linkage assembly is arranged between the first connecting rod piece and the second connecting rod piece, so that the space occupied by the rotating shaft device is smaller, the whole volume of the rotating shaft device can be reduced, and the miniaturization development of the rotating shaft device is facilitated.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below. It will be apparent that the figures in the following description relate to some embodiments of the invention. Other figures may be derived from these figures without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic perspective view of an electronic device according to an embodiment of the application;

FIG. 2 is an exploded perspective view of a folding housing and a flexible screen of the electronic device of FIG. 1;

FIG. 3 is an exploded perspective view of the folding housing of FIG. 2;

FIG. 4 is an enlarged view of the spindle assembly of FIG. 3;

FIG. 5 is an exploded perspective view of the spindle assembly of FIG. 4;

FIG. 6 is a schematic perspective view of the spindle assembly of FIG. 5 from another perspective;

FIG. 7 is an enlarged view of a part of the structure of the spindle unit of FIG. 5;

FIG. 8 is an exploded perspective view of the spindle assembly of FIG. 7;

FIG. 9 is a schematic perspective view of another view of the spindle assembly of FIG. 8;

FIG. 10 is a further perspective view of the spindle assembly of FIG. 8;

FIG. 11 is a further perspective view of the spindle assembly of FIG. 9;

FIG. 12 is a further perspective view of the spindle assembly of FIG. 10;

FIG. 13 is a further perspective view of the spindle assembly of FIG. 11;

FIG. 14 is an enlarged view of the base, the rotating mechanism and the pushing member of FIG. 12;

FIG. 15 is a schematic perspective view of the linkage assembly, linkage assembly and damping mechanism of FIG. 12;

FIG. 16 is a schematic perspective view of the linkage assembly, linkage assembly and damping mechanism of FIG. 13;

FIG. 17 is a front view of the spindle assembly of FIG. 7;

FIG. 18 is a perspective cross-sectional view of the spindle assembly of FIG. 7;

FIG. 19 is a cross-sectional view of the spindle assembly of FIG. 18;

FIG. 20 is another perspective cross-sectional view of the spindle assembly of FIG. 7;

FIG. 21 is a cross-sectional view of the spindle assembly of FIG. 20;

FIG. 22 is another perspective cross-sectional view of the spindle assembly of FIG. 7;

FIG. 23 is a cross-sectional view of the spindle assembly of FIG. 22;

fig. 24 is a schematic perspective view of the electronic device of fig. 1 in a fully folded state;

FIG. 25 is a schematic perspective view of the spindle assembly of FIG. 24;

Fig. 26 is a schematic perspective view of another view of the spindle assembly of fig. 25.

The main reference numerals illustrate: 100. an electronic device; 20. folding the shell; 21. a frame; 211. a first front face; 214. a side surface; 215. an end face; 216. a mounting groove; 22. a folding device; 220. a base; 221. a first mounting portion; 2211. a third circular arc groove; 2212. a first bump; 2213. a fourth circular arc groove; 2214. a second bump; 2215. a first rotation-assisting groove; 2216. a second rotation-assisting groove; 223. a second mounting portion; 2231. a support bar; 2233. a positioning sheet; 2234. a connection hole; 225. a third mounting portion; 2251. a connecting strip; 2253. A support sheet; 2255. a guide rail; 226. a connecting shaft; 23. a support mechanism; 230. a middle support; 2301. a first clearance groove; 2303. a second clearance groove; 232. a first side support; 2320. a first adjustment tank; 2321. a first side support plate; 2322. a first adjustment plate; 2323. a first positioning section; 2324. a second positioning section; 2325. a first circular arc plate; 2326. a first circular arc groove; 234. a second side support; 2340. a second regulating groove; 2341. a second side support plate; 2342. a second adjusting plate; 2343. A third positioning section; 2344. a fourth positioning section; 2345. a second arc plate; 2346. a second circular arc groove; 24. a positioning piece; 242. a positioning part; 245. a connection part; 2452. a guide groove; 246. a chute; 25. a rotating mechanism; 250. a first rotation mechanism; 251. a first rotating member; 2510. a third circular arc rail; 2511. a first rotating part; 2512. a first connection portion; 2514. a first rotary drum; 2515. a first shaft hole; 2516. a first adjustment shaft; 252. a first connector; 2520. a first chute; 2521. a first transfer section; 2521a, a first escape opening; 2521b, first connection hole; 2522. a first circular arc rail; 2523. a first slide guide portion; 2523a, a first guide slot; 2525. a first connection portion; 255. a second rotation mechanism; 256. a second rotating member; 2560. a fourth circular arc rail; 2561. a second rotating part; 2562. a second connecting portion; 2564. a second sleeve; 2565. a second shaft hole; 2566. a second adjustment shaft; 257. a second connector; 2570. a second chute; 2571. a second switching part; 2571a, a second clearance port; 2571b, second connection hole; 2572. A second circular arc rail; 2573. a second slide guide portion; 2573a, a second guide groove; 2575. a second positioning portion; 26. a connecting rod assembly; 261. a first link member; 2610. a first slide rail; 2611. a first rotating part; 2612. a first rotation hole; 2613. a first sliding portion; 2615. a first connection portion; 2616. a first cam; 2616a, a first protrusion; 2616b, a first recess; 2617. a first receiving groove; 2617a, a first abutment helicoid; 2617b, a second abutment helicoid; 2618. a first stopper; 265. a second link member; 2650. A second slide rail; 2651. a second rotating part; 2652. a second rotation hole; 2653. a second sliding part; 2655. a second connecting portion; 2656. a second cam; 2656a, second protrusions; 2656b, second recesses; 2657. a second accommodating groove; 2657a, third abutment helicoids; 2657b, fourth abutment helicoids; 2658. a second stopper; 28. a linkage assembly; 281. a first slider; 2801. a first helicoid; 2803. a third helicoid; 2804. a second helicoid; 2806. a fourth helicoid; 2811. a first slide cylinder; 2813. A first connection plate; 2815. a first surface; 2816. a third stopper; 283. a second slider; 2831. a second slide cylinder; 2833. a second connecting plate; 2835. a second surface; 284. an elastic part; 2840. a first elastic portion; 2841. a first gap; 2842. the first pushing block; 2843. a first support block; 2845. a second elastic part; 2846. a second gap; 2847. the second pushing block; 2848. a second support block; 29. a damping mechanism; 291. a holding member; 2910. the cam is abutted; 2911. a third projection; 2913. A third recess; 292. a holding cylinder; 293. a connection part; 294. an elastic member; 30. a flexible screen; 31. a bendable region; 33. a non-bending region.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.

Furthermore, the following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the application may be practiced. Directional terms, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., in the present application are merely referring to the directions of the attached drawings, and thus, directional terms are used for better, more clear explanation and understanding of the present application, rather than indicating or implying that the apparatus or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "disposed on … …" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to 3, an electronic device 100 according to an embodiment of the invention includes a foldable housing 20 and a flexible screen 30 disposed on the foldable housing 20, wherein the flexible screen 30 can be folded or flattened along with the foldable housing 20. The folding housing 20 includes two frames 21 and a rotating shaft device 22 connected between the two frames 21, wherein two opposite sides of the rotating shaft device 22 are respectively connected to the two frames 21, and the two frames 21 are folded or flattened by the rotating shaft device 22. The flexible screen 30 comprises a bendable region 31 corresponding to the spindle means 22, and two non-bendable regions 33 connected to opposite sides of the bendable region 31. The flexible screen 30 is connected to the two frames 21 and the spindle means 22. In this embodiment, the flexible screen 30 is disposed on the front sides of the two frames 21 and the front side of the rotating shaft device 22, specifically, two non-bending areas 33 of the flexible screen 30 can be respectively fixed on the front sides of the two frames 21, the bendable areas 31 are attached to the front sides of the rotating shaft device 22, and the bendable areas 31 of the flexible screen 30 can be bent or flattened along with the rotating shaft device 22. The flexible screen 30 may be, but is not limited to, flexible display screens, flexible touch display screens, and other flexible components with corresponding functions, or flexible components fixedly attached with a flexible support plate, such as flexible display screens attached with flexible steel plates, flexible touch screens, and the like.

Referring to fig. 4-13, the rotating shaft device 22 includes a base 220, a pair of connecting shafts 226, a supporting mechanism 23, a rotating mechanism 25, a connecting rod assembly 26 and a linkage assembly 28, wherein the supporting mechanism 23 includes a middle supporting member 230, a first side supporting member 232 and a second side supporting member 234, and the first side supporting member 232 and the second side supporting member 234 are respectively located at two opposite sides of the middle supporting member 230; the rotating mechanism 25 includes a first rotating mechanism 250 and a second rotating mechanism 255, wherein the first rotating mechanism 250 is provided with one side of the base 220, and the second rotating mechanism 255 is provided with the opposite side of the base 220; The pair of connecting shafts 226 are respectively arranged on two opposite sides of the base 220, and the axes of the pair of connecting shafts 226 are spaced in parallel; the link assembly 26 includes a first link member 261 and a second link member 265, the first link member 261 is connected to one of the connecting shafts 226, the first link member 261 is rotatably connected to the base 220 through one of the connecting shafts 226, that is, the first link member 261 is rotatable about an axis of the connecting shaft 226 with respect to the base 220; the second link member 265 is connected to the other connection shaft 226, and the second link member 265 is rotatably connected to the base 220 through the other connection shaft 226, that is, the second link member 265 is rotatable with respect to the base 220 about the axis of the connection shaft 226; The end of the first link 261 away from the base 220 is movably connected with the first rotating mechanism 250 through the cooperation of a sliding groove and a sliding rail, the sliding groove is arranged on one of the first link 261 and the first rotating mechanism 250, the sliding rail is arranged on the other one of the first link 261 and the first rotating mechanism 250, and the sliding rail is slidably inserted into the sliding groove; the end of the second link member 265 far away from the base 220 is movably connected with the second rotating mechanism 255 through the cooperation of a sliding groove and a sliding rail, the sliding groove is arranged on one of the second link member 265 and the second rotating mechanism 255, and the sliding rail is arranged on the other of the second link member 265 and the second rotating mechanism 255; The linkage assembly 28 is disposed between the first link member 261 and the second link member 265, the linkage assembly 28 includes a first slider 281 and a second slider 283, the first slider 281 and the second slider 283 are slidably connected to the pair of connecting shafts 226, that is, the first slider 281 and the second slider 283 can slide along the axial direction of the connecting shafts 226; at least one of the first slider 281 and the second slider 283 is provided with an elastic portion 284, the elastic portion 284 being located between the first slider 281 and the second slider 283, that is, the elastic portion 284 is sandwiched by the first slider 281 and the second slider 283; The first link member 261 is respectively connected with the first sliding member 281 and the second sliding member 283 by spiral surface matching, and the second link member 265 is respectively connected with the first sliding member 281 and the second sliding member 283 by spiral surface matching; the elastic portion 284 is used for pushing the first slider 281 and the second slider 283, so that the first slider 281 and the second slider 283 respectively push the first link 261 and the second link 265; When the first rotating mechanism 250 and/or the second rotating mechanism 255 rotate relative to the base 220, the first rotating mechanism 250 drives the first link 261 to rotate relative to the base 220, or the second rotating mechanism 255 drives the second link 265 to rotate relative to the base 220, the first link 261 and the second link 265 can synchronously rotate relative to the base 220 through the link assembly 28 disposed between the first link 261 and the second link 265, so as to realize synchronous folding or synchronous unfolding of the first link 261 and the second link 265, and the first side support 232 and the second side support 234 can synchronously fold or synchronously unfold.

In this embodiment, the front surface refers to the surface facing the light emitting surface of the flexible screen 30, and the back surface refers to the surface facing away from the light emitting surface of the flexible screen 30. The electronic device 100 is, for example, but not limited to, a mobile phone, a tablet computer, a display, a liquid crystal panel, an OLED panel, a television, a smart watch, a VR head mounted display, a vehicle mounted display, and any other product or component having a display function.

The first link 261 and the second link 265 of the rotating shaft device 22 are respectively and rotatably connected to two opposite sides of the base 220, the first link 261 and the first rotating mechanism 250 are respectively and slidably connected with the slide rail through a slide groove, the second link 265 and the second rotating mechanism 255 are respectively and rotatably connected to two opposite sides of the base 220 through a slide groove and a slide rail, the first link 261 is respectively and rotatably connected with the first sliding member 281 and the second sliding member 283 through a spiral surface, the second link 265 is respectively and rotatably connected with the first sliding member 281 and the second sliding member 283 through a spiral surface, and the elastic part 284 pushes the first sliding member 281 and the second sliding member 283 so that the first sliding member 281 and the second sliding member 283 respectively push against the first link 261 and the second link 265; therefore, when the first link member 261 or the second link member 265 rotates relative to the base 220, the link assembly 28 between the first link member 261 and the second link member 265 moves along the axial direction of the connecting shaft 226 to drive the first link member 261 and the second link member 265 to synchronously rotate relative to the base 220, thereby enabling the first side support 232 and the second side support 234 of the rotating shaft device 22 to synchronously fold or synchronously unfold; because the rotating shaft device 22 can realize synchronous folding or flattening without adopting gears, and the linkage assembly 28 is arranged between the first connecting rod piece 261 and the second connecting rod piece 265, the space occupied by the rotating shaft device 22 is smaller, thereby reducing the whole volume of the rotating shaft device 22 and being beneficial to the miniaturization development of the rotating shaft device 22; second, the elastic portion 284 elastically pushes the first slider 281 and the second slider 283 against the first link member 261 and the second link member 265, so as to eliminate the error between the spiral surfaces of the first link member 261 and the first slider 281 and the second slider 283, and eliminate the error between the spiral surfaces of the second link member 265 and the first slider 281 and the second slider 283, so that the first link member 261 and the second link member 265 can smoothly rotate relative to the linkage assembly 28.

As shown in fig. 2 and 3, the frame 21 includes a front 211, a back, two opposite sides 214 and two ends 215, the hinge device 22 is connected between two adjacent ends 215 of the two frames 21, the bendable region 31 of the flexible screen 30 is attached to the front of the hinge device 22, and the non-bendable region 33 of the flexible screen 30 is connected to the front 211 of the frame 21. The front 211 of each frame 21 is provided with a mounting groove 216 near one end of the rotating shaft device 22, the mounting groove 216 penetrates through the front 211 of the frame 21, and two opposite ends of the mounting groove 216 extend to two opposite side faces 214 near the frame 21 respectively. Opposite sides of the rotating shaft device 22 are respectively accommodated in the mounting grooves 216 of the two frames 21, that is, one side of the first rotating mechanism 250 away from the base 220 is connected to the mounting groove 216 of one of the frames 21, and one side of the second rotating mechanism 255 away from the base 220 is connected to the mounting groove 216 of the other frame 21. The back of the frame 21 is provided with a plurality of accommodating spaces (not shown) for mounting electronic devices such as a circuit board and a battery.

As shown in fig. 4 to 7, the first rotating mechanism 250 includes a first rotating member 251 and a first connecting member 252, the first rotating member 251 is rotatably connected to the base 220, one end of the first rotating member 251 away from the base 220 is rotatably connected to the first connecting member 252, a first rotation axis L1 between the first rotating member 251 and the base 220, a second rotation axis L2 between the first connecting member 261 and the base 220, and a third rotation axis L3 between the first rotating member 251 and the first connecting member 252 are parallel to each other; the second rotating mechanism 255 includes a second rotating member 256 and a second connecting member 257, the second rotating member 256 is rotatably connected to the base 220, an end of the second rotating member 256 away from the base 220 is rotatably connected to the second connecting member 257, a first rotation axis L1 between the second rotating member 256 and the base 220, a second rotation axis L2 between the second connecting member 265 and the base 220, and a third rotation axis L3 between the second rotating member 256 and the second connecting member 257 are parallel to each other. The middle support member 230 covers the front surface of the base 220, and first avoidance grooves 2301 are respectively formed on opposite sides of the middle support member 230 corresponding to the first rotating member 251 and the second rotating member 256, so as to facilitate the first rotating member 251 and the second rotating member 256 to rotate relative to the base 220; the opposite sides of the middle support 230 are provided with second avoidance grooves 2303 corresponding to the first link 261 and the second link 265, respectively, so as to facilitate the rotation of the first link 261 and the second link 265 relative to the base 220. In this embodiment, the middle support 230 is a rectangular plate.

One side of the first side support 232 is slidably and rotatably coupled to the first rotating member 251, the opposite side of the first side support 232 is rotatably coupled to the first coupling member 252, one side of the second side support 234 is slidably and rotatably coupled to the second rotating member 256, and the opposite side of the second side support 234 is rotatably coupled to the second coupling member 257. Specifically, the side of the first side support 232 near the base 220 is slidably and rotatably connected to the first rotating member 251 through the cooperation of a first adjustment groove provided in one of the first side support 232 and the first rotating member 251 and a first adjustment shaft provided in the other of the first side support 232 and the first rotating member 251, the axis of the first adjustment shaft being parallel to the first rotation axis L1; the second side support 234 is slidably and rotatably connected to the second rotating member 256 by a second adjustment groove provided in one of the second side support 234 and the second rotating member 256, and the second adjustment groove is provided in the other of the second side support 234 and the second rotating member 256, the axis of the second adjustment shaft is parallel to the other first rotation axis L1, and the two first rotation axes L1 are spaced apart and parallel. In this embodiment, a first adjusting shaft 2516 is disposed on one side of the first rotating member 251, a first adjusting slot 2320 is disposed on one side of the first side supporting member 232 near the base 220, and the first adjusting shaft 2516 is rollably inserted into the first adjusting slot 2320; the second rotating member 256 has a second adjusting shaft 2566 on one side, and the second side supporting member 234 has a second adjusting groove 2340 on one side near the base 220, where the second adjusting shaft 2566 is rollably inserted into the second adjusting groove 2340. When the first and second side supports 232 and 234 are folded or unfolded with respect to the middle support 230, the first adjustment shaft 2516 slides and rotates in the first adjustment slot 2320 and the second adjustment shaft 2566 slides and rotates in the second adjustment slot 2340.

As shown in fig. 5 to 7, the first side supporting member 232 includes a first side supporting plate 2321 and a first adjusting plate 2322 disposed on a side of the first side supporting plate 2321 near the middle supporting member 230, and the first adjusting groove 2320 is disposed on the first adjusting plate 2322. The second side support 234 includes a second side support plate 2341 and a second adjusting plate 2342 disposed on a side of the second side support plate 2341 near the middle support 230, and the second adjusting groove 2340 is disposed on the second adjusting plate 2342. The first adjustment groove 2320 extends from a side near the middle support 230 to a side far from the middle support 230 and the first side support plate 2321, and a middle portion of the first adjustment groove 2320 is bent to a side far from the first side support plate 2321. The first adjustment groove 2320 includes a first positioning segment 2323 and a second positioning segment 2324 at opposite ends thereof, the first positioning segment 2323 being closer to the middle support 230 than the second positioning segment 2324. The second adjustment groove 2340 extends from a side close to the middle support 230 to a side far from the middle support 230 and the second side support plate 2341, and a middle portion of the second adjustment groove 2340 is bent to a side far from the second side support plate 2341; the second adjusting groove 2340 includes a third positioning segment 2343 and a fourth positioning segment 2344 at opposite ends thereof, and the third positioning segment 2343 is closer to the middle support 230 than the fourth positioning segment 2344. When the first and second side supports 232 and 234 are in the completely flattened state, the first adjustment shaft 2516 is positioned at the first positioning section 2323 and the second adjustment shaft 2566 is positioned at the third positioning section 2343 such that the front surface of the first side support 232, the front surface of the second side support 234 and the front surface of the middle support 230 are coplanar, so that the first, second and middle supports 232, 234 and 230 can stably support the flexible screen to prevent the flexible screen from being sunk to be damaged. When the first side support 232 and the second side support 234 are in the fully folded state, the first adjusting shaft 2516 is positioned at the second positioning section 2324, and the second adjusting shaft 2566 is positioned at the fourth positioning section 2344, so that the front surface of the first side support 232, the front surface of the middle support 230, and the front surface of the second side support 234 enclose a water drop-shaped storage space, so as to conveniently store the bendable region of the flexible screen. In this embodiment, the opposite ends of the back surface of the first side supporting plate 2321 near the side of the middle supporting member 230 are respectively provided with a first adjusting plate 2322, and the opposite ends of the back surface of the second side supporting plate 2341 near the side of the middle supporting member 230 are respectively provided with a second adjusting plate 2342. Further, an outer surface of the first adjusting plate 2322 facing away from the first side support plate 2321 is provided with an arcuate surface, and an outer surface of the second adjusting plate 2342 facing away from the first side support plate 2321 is provided with an arcuate surface to facilitate folding or unfolding of the first side support 232 and the second side support 234.

The rotation axis between the first side support 232 and the first link 252 is parallel to the first rotation axis L1, and the rotation axis between the second side support 234 and the second link 257 is parallel to the first rotation axis L1. The first side support 232 and the first connecting piece 252 are rotatably connected by the cooperation of a first circular arc groove formed in one of the first side support 232 and the first connecting piece 252 and a first circular arc rail formed in the other of the first side support 232 and the first connecting piece 252, and the axis of the first circular arc groove is parallel to the first rotation axis L1. Specifically, the opposite ends of the side of the first side supporting element 232 away from the middle supporting element 230 are respectively provided with a first arc plate 2325, each first arc plate 2325 is provided with a first arc groove 2326, the two first arc grooves 2326 are coaxial, one end of each first arc groove 2326 extends to the back surface of the first side supporting plate 2321, the other end of each first arc groove 2326 penetrates through the side surface of the first arc plate separating middle supporting element 230, the opposite ends of the first connecting element 252 are respectively provided with a first arc rail 2522, and the two first arc rails 2522 are respectively rotatably accommodated in the two first arc grooves 2326. The second side support 234 and the second connector 257 are rotatably connected by a second circular arc groove provided in one of the second side support 234 and the second connector 257, and a second circular arc rail provided in the other of the second side support 234 and the second connector 257, the axis of the second circular arc groove being parallel to the first rotation axis L1. Specifically, the opposite ends of the side of the second side support member 234 away from the middle support member 230 are respectively provided with a second arc plate 2345, each second arc plate 2345 is provided with a second arc groove 2346, the two second arc grooves 2346 are coaxial, one end of each second arc groove 2346 extends to the back surface of the second side support plate 2341, the other end of each second arc groove 2346 penetrates through the side surface of the second arc plate 2345 to separate the middle support member 230, the opposite ends of the second connecting member 257 are respectively provided with a second arc rail 2572, and the two second arc rails 2572 are respectively rotatably accommodated in the two second arc grooves 2346.

Referring to fig. 7-11, a first rotation axis L1 between the first rotating mechanism 250 and the base 220 is parallel to a second rotation axis L2 between the first link 261 and the base 220, and a sliding direction of the first link 261 relative to the first connecting member 252 is perpendicular to the first rotation axis L1; the first rotation axis L1 between the second rotation mechanism 255 and the base 220 is parallel to the second rotation axis L2 between the second link members 265, and the sliding direction of the second link members 265 with respect to the second connector 257 is perpendicular to the first rotation axis L1; specifically, the first rotating member 251 and the second rotating member 256 rotate around two first rotation axes L1, respectively, relative to the base 220, and the two first rotation axes L1 are in clearance parallel; the first link member 261 and the second link member 265 rotate relative to the base 220 about two second rotation axes L2, respectively, the two second rotation axes L2 are in clearance parallel, and the first rotation axis L1 is parallel to the second rotation axis L2. The first rotating member 251 is rotationally connected with the base 220 through the matching of the circular arc groove and the circular arc rail, the second rotating member 256 is rotationally connected with the base 220 through the matching of the circular arc groove and the circular arc rail, and the first rotating axis L1 between the first rotating member 251 and the base 220 is parallel to the first rotating axis L1 between the second rotating member 256 and the base 220. Specifically, the first rotating member 251 is rotationally connected with the base 220 through the cooperation of a third circular arc rail and a third circular arc groove, and the axis of the third circular arc rail is collinear with the first rotation axis L1; the third circular arc rail is provided to one of the first rotating member 251 and the base 220, and the third circular arc groove is provided to the other of the first rotating member 251 and the base 220. The second rotating member 256 is rotationally connected with the base 220 through the cooperation of a fourth circular arc rail and a fourth circular arc groove, and the axis of the fourth circular arc rail is collinear with the other first rotating axis L1; the fourth circular arc rail is provided to one of the second rotating member 256 and the base 220, and the fourth circular arc groove is provided to the other of the second rotating member 256 and the base 220. In the present embodiment, a third arc rail 2510 is disposed at one end of the first rotating member 251 away from the first connecting member 252, a third arc groove 2211 is disposed at one side of the base 220, and the third arc rail 2510 is rotatably accommodated in the third arc groove 2211; the end of the second rotating member 256 away from the second connecting member 257 is provided with a fourth arc rail 2560, the opposite side of the base 220 is provided with a fourth arc groove 2213, and the fourth arc rail 2560 is rotatably accommodated in the fourth arc groove 2213. The first rotating member 251 is rotatably connected with the first connecting member 252 through the first rotating shaft 253, and a third rotating axis L3 between the first rotating member 251 and the first connecting member 252 is collinear with the axis of the first rotating shaft 253; the second rotating member 256 is rotatably connected to the second connecting member 257 via the second rotating shaft 254, and a third rotation axis L3 between the second rotating member 256 and the second connecting member 257 is collinear with the axis of the second rotating shaft 254.

As shown in fig. 12 to 14, the first rotating member 251 includes a first rotating portion 2511 and a first connecting portion 2512 disposed at opposite ends thereof, the third circular arc rail 2510 is disposed at an end portion of the first rotating portion 2511, and an end of the first connecting portion 2512 remote from the first rotating portion 2511 is rotatably connected to the first connecting member 252. In this embodiment, the opposite ends of the first rotating portion 2511 are respectively provided with a third circular arc rail 2510, and the two third circular arc rails 2510 are coaxial. Optionally, the first connection portion 2512 is a first half cylinder, the first connection portion 2512 is a first connection piece connected to a peripheral wall of the first half cylinder, and opposite ends of the first half cylinder along an axial direction thereof are respectively provided with a third circular arc rail 2510. Further, the axis of the third circular arc rail 2510 is collinear with the axis of the first semi-cylinder. Further, the outer circumferential surface of the third circular arc rail 2510 is coplanar with the outer circumferential surface of the first semicircle. One side of the first connection portion 2512, which faces away from the first rotation portion 2511, is provided with two first lugs spaced from each other, one end of each first lug, which faces away from the first rotation portion 2511, is provided with a first rotation cylinder 2514, and the first rotation cylinder 2514 is axially provided with a first shaft hole 2515 along the axial direction thereof, and the two first rotation cylinders 2514 are coaxial. A first adjustment shaft 2516 is provided at one side of the first rotation member 251, and an axis of the first adjustment shaft 2516 is parallel to the first rotation axis L1. The second rotating member 256 includes a second rotating portion 2561 and a second connecting portion 2562 disposed at opposite ends thereof, the fourth circular arc rail 2560 is disposed at an end of the second rotating portion 2561, and one end of the second connecting portion 2562 away from the second rotating portion 2561 is rotatably connected to the second connecting member 257. In this embodiment, the opposite ends of the second rotating portion 2561 are respectively provided with a fourth circular arc rail 2560, and the two fourth circular arc rails 2560 are coaxial. Optionally, the second connecting portion 2562 is a second half cylinder, the second connecting portion 2562 is a second connecting piece connected to a peripheral wall of the second half cylinder, and opposite ends of the second half cylinder along an axial direction of the second half cylinder are respectively provided with a fourth circular arc rail 2560. Further, the axis of the fourth circular arc rail 2560 is collinear with the axis of the second semi-cylinder. Further, the outer circumferential surface of the fourth circular arc rail 2560 is coplanar with the outer circumferential surface of the second semi-cylinder. One side of the second connecting portion 2562, which faces away from the second rotating portion 2561, is provided with two second lugs spaced from each other, one end of each second lug, which faces away from the second rotating portion 2561, is provided with a second sleeve 2564, the second sleeve 2564 is axially provided with a second shaft hole 2565, and the two second sleeves 2564 are coaxial. A second adjustment shaft 2566 is provided at one side of the second rotating member 256, and an axis of the second adjustment shaft 2566 is parallel to the first rotation axis L1.

The first connecting piece 252 is in a strip shape, and a first circular arc rail 2522 is respectively arranged at one side, far away from the first rotating piece 251, of the opposite ends of the first connecting piece 252. The first connecting piece 252 includes a first adapting portion 2521 and a first sliding guiding portion 2523 disposed at opposite ends thereof, and a first connecting portion 2525 connected between the first adapting portion 2521 and the first sliding guiding portion 2523; one of the first arc rails 2522 is disposed at an end of the first rotating portion 2521 facing away from the first sliding guiding portion 2523, and the other first arc rail 2522 is disposed at an end of the first sliding guiding portion 2523 facing away from the first rotating portion 2521, and the first connecting portion 2512 of the first rotating member 251 is rotatably connected to the first rotating portion 2521. The end of the first link member 261 away from the base 220 is provided with a first sliding rail 2610, the first connecting member 252 is provided with a first sliding groove 2520, specifically, the first sliding groove 2520 is provided with a first sliding guiding portion 2523, and the first sliding rail 2610 of the first link member 261 is slidably inserted into the first sliding groove 2520. The front surface of the first connection portion 2521 is provided with two first avoidance ports 2521a at intervals, the first connection portion 2521 is provided with a first connection hole 2521b along the length direction of the first connection piece 252, and the first connection hole 2521b is communicated with the two first avoidance ports 2521a; the two first avoidance openings 2521a are used for respectively accommodating the two first rotating cylinders 2514; when the two first rotation cylinders 2514 are rotatably received in the two first avoidance ports 2521a, the first shaft holes 2515 are coaxial with the first connection holes 2521 b. The front surface of the first guiding and sliding portion 2523 is provided with a first guiding slot 2523a, two opposite ends of the first guiding slot 2523a respectively penetrate through two opposite sides of the first guiding and sliding portion 2523, and one end of the first link member 261, which is far away from the base 220, is slidably accommodated in the first guiding slot 2523a; the inner side surface of the first guide slot 2523a is provided with a first sliding slot 2520, and the first sliding slot 2520 penetrates through two opposite sides of the first guide sliding portion 2523 along a direction perpendicular to the first rotation axis L1. In this embodiment, the opposite inner sides of the first guiding slot 2523a are respectively provided with a first sliding slot 2520.

The second connecting member 257 has a strip shape, and a second circular arc rail 2572 is respectively disposed at two opposite ends of the second connecting member 257 and at one side away from the second rotating member 256. The second connecting piece 257 includes a second adapting portion 2571 and a second guiding and sliding portion 2573 disposed at opposite ends thereof, and a second positioning portion 2575 connected between the second adapting portion 2571 and the second guiding and sliding portion 2573; one of the second circular arc rails 2572 is disposed at one end of the second rotating portion 2571 facing away from the second sliding guiding portion 2573, the other second circular arc rail 2572 is disposed at one end of the second sliding guiding portion 2573 facing away from the second rotating portion 2571, and the second connecting portion 2562 of the second rotating member 256 is rotatably connected to the second adapting portion 2571; the end of the second link member 265 away from the base 220 is provided with a second sliding rail 2650, the second connecting member 257 is provided with a second sliding groove 2570, specifically, the second sliding groove 2570 is provided with a second sliding guiding portion 2573, and the second sliding rail 2650 of the second link member 265 is slidably inserted into the second sliding groove 2570. The front surface of the second adapting portion 2571 is provided with two second avoidance ports 2571a at intervals, the second rotating portion 2571 is provided with a second connecting hole 2571b along the length direction of the second connecting piece 257, and the second connecting hole 2571b is communicated with the two second avoidance ports 2571a; the two second avoidance ports 2571a are used for respectively accommodating the two second sleeves 2564; when the two second sleeves 2564 are rotatably received in the two second avoidance holes 2571a, the second shaft hole 2565 is coaxial with the second connection hole 2571 b. The front surface of the second sliding guide portion 2573 is provided with a second guide groove 2573a, two opposite ends of the second guide groove 2573a respectively penetrate through two opposite sides of the second sliding guide portion 2573, and one end of the second link member 265 away from the base 220 is slidably accommodated in the second guide groove 2573a; the inner side surface of the second guide groove 2573a is provided with a second sliding groove 2570, and the second sliding groove 2570 penetrates through two opposite sides of the second guide sliding part 2573 along the direction perpendicular to the first rotation axis L1; in this embodiment, the opposite inner sides of the second guiding groove 2573a are respectively provided with a second sliding groove 2570.

The base 220 is an elongated body, and the base 220 includes a first mounting portion 221 and a second mounting portion 223 at opposite ends thereof, and a third mounting portion 225 between the first mounting portion 221 and the second mounting portion 223, the first mounting portion 221 being configured to mount the first rotating member 251 and the second rotating member 256. The opposite sides of the front surface of the first mounting portion 221 are respectively provided with a third arc groove 2211 and a fourth arc groove 2213, the axis of the third arc groove 2211 is parallel to the axis of the fourth arc groove 2213 at intervals, a third arc rail 2510 of the first rotating member 251 is rotatably accommodated in the third arc groove 2211, and a fourth arc rail 2560 of the second rotating member 256 is rotatably accommodated in the fourth arc groove 2213. Specifically, opposite sides of the front surface of the first mounting portion 221, which is far from one end of the third mounting portion 225, are respectively provided with a first bump 2212 and a second bump 2214, the third circular arc groove 2211 is disposed on a surface of the first bump 2212 facing the third mounting portion 225, and the fourth circular arc groove 2213 is disposed on a surface of the second bump 2214 facing the third mounting portion 225. First rotation assisting groove 2215 and second rotation assisting groove 2216 are respectively arranged on two opposite sides of the front surface of first mounting portion 221, optionally, arc surfaces are arranged on the inner surfaces of first rotation assisting groove 2215 and second rotation assisting groove 2216, the axis of first rotation assisting groove 2215 is collinear with the axis of third arc groove 2211, and the axis of second rotation assisting groove 2216 is collinear with the axis of fourth arc groove 2213. The second mounting portion 223 includes a supporting bar 2231 connected to an end of the third mounting portion 225 away from the first mounting portion 221, and a positioning piece 2233 disposed on the supporting bar 2231 away from the third mounting portion 225; alternatively, one end of the supporting strip 2231 facing away from the third mounting portion 225 is connected to the middle portion of the positioning strip 2233, and two opposite ends of the positioning strip 2233 extend out of two opposite sides of the supporting strip 2231, and two opposite ends of the positioning strip 2233 are respectively provided with a connecting hole 2234. The third mounting portion 225 includes a connecting bar 2251 connected between the first mounting portion 221 and the second mounting portion 223, two support tabs 2253 connected to the first mounting portion 221, and guide rails 2255 provided on opposite sides of the connecting bar 2251; the two supporting pieces 2253 are respectively disposed on two opposite sides of the supporting bar 2231, and the front surface of the supporting piece 2253 is an arc surface. Two guide rails 2255 are located near one end of the second mounting portion 223.

The rotating shaft device 22 further includes a positioning member 24, the positioning member 24 is connected to the third mounting portion 225 of the base 220, and the positioning member 24 and the base 220 jointly position the first rotating member 251 and the second rotating member 256. The first rotating member 251 is rotationally connected with the positioning member 24 through the matching of the circular arc groove and the circular arc rail, the second rotating member 256 is rotationally connected with the positioning member 24 through the matching of the circular arc groove and the circular arc rail, and the first rotating axis L1 between the first rotating member 251 and the positioning member 24 is parallel to the first rotating axis L1 between the second rotating member 256 and the positioning member 24. Specifically, the positioning member 24 includes positioning portions 242 at opposite ends thereof, and a connecting portion 245 connected between the two positioning portions 242, wherein a fifth arc groove 2421 is respectively disposed on the same side of the two positioning portions 242, axes of the two fifth arc grooves 2421 are parallel, and a third arc rail 2510 of the first rotating member 251 and a fourth arc rail 2560 of the second rotating member 256 are respectively rotatably accommodated in the two fifth arc grooves 2421. Alternatively, the back surface of the positioning portion 242 is provided as an arc surface that mates with the front surface of the support piece 2253 so that the positioning member 24 slides on the support piece 2253 in the axial direction of the fifth arc groove 2421. In other embodiments, the side surfaces of the two positioning portions 242 facing the first rotating member 251 are respectively provided with an arc rail, the side surfaces of the first transmission portion 2511 of the first rotating member 251 and the second transmission portion 2561 of the second rotating member 256 facing the positioning member 24 are respectively provided with an arc groove, and the two arc rails are rotatably accommodated in the two arc grooves. The positioning piece 24 is slidably connected with the base 220 through the matching of a guide sliding block and a guide sliding groove, the guide sliding block is arranged on one of the positioning piece 24 and the base 220, and the guide sliding groove is arranged on the other of the positioning piece 24 and the base 220; in this embodiment, the side of the connecting bar 2251 of the third mounting portion 225 is provided with a guide rail 2255, the back of the positioning member 24 is provided with a chute 246, and the guide rail 2255 is slidably received in the chute 246, so that the positioning member 24 can move along the length direction of the base 220. Optionally, a guide groove 2452 is provided on the back surface of the connecting portion 245 along the axial direction of the fifth arc groove 2421, opposite ends of the guide groove 2452 respectively penetrate through opposite side surfaces of the positioning member 24, and the connecting bar 2251 is slidably inserted into the guide groove 2452; the opposite side surfaces of the guide groove 2452 are respectively provided with a sliding groove 246, the sliding groove 246 extends along the axial direction of the fifth arc groove 2421, the opposite ends of the sliding groove 246 respectively penetrate through the opposite side surfaces of the positioning piece 24, and the two guide rails 2255 of the third mounting portion 225 are slidably accommodated in the two sliding grooves 246 of the positioning piece 24. The side surface of the two positioning parts 242 facing away from the fifth arc groove 2421 is provided with a avoidance hole 2424, and the axes of the two avoidance holes 2424 are parallel.

Referring to fig. 7-16, the linkage assembly 28 is connected to a pair of connecting shafts 226 and can slide along the axial direction of the connecting shafts 226 relative to the base 220, and the first connecting rod 261 and the second connecting rod 265 are respectively connected with the linkage assembly 28 by screw surfaces in a matching manner; when the first link member 261 and/or the second link member 265 rotate about the corresponding connection shaft 226, the link assembly 28 slides along the axial direction of the connection shaft 226 in the first direction or the second direction, so as to drive the first link member 261 and the second link member 265 to synchronously rotate relative to the base 220 to realize mutual folding or mutual flattening. The first direction is opposite to the second direction, and both the first direction and the second direction are parallel to the second rotation axis L2.

Specifically, the first link member 261 further includes a first rotating portion 2611 rotatably connected to the link shaft 226, a first sliding portion 2613, and a first connecting portion 2615 connected between the first rotating portion 2611 and the first sliding portion 2613, and the first slide rail 2610 is provided at a side portion of the first sliding portion 2613. Specifically, the first rotating portion 2611 is a first rotating cylinder provided with a first rotating hole 2612 in an axial direction thereof, and the connection shaft 226 is inserted into the first rotating hole 2612 of the first rotating cylinder; the first sliding portion 2613 is a rectangular plate, and two opposite sides of the rectangular plate are respectively provided with a first sliding rail 2610, wherein the first sliding rail 2610 is perpendicular to the axis of the first rotating cylinder. One end of the first rotation portion 2611 is provided with a first cam 2616, and the first rotation portion 2611 is coaxial with the first cam 2616. The first cam 2616 includes a concave-convex surface provided at an end of the first rotary drum, the concave-convex surface including a first convex portion 2616a and a first concave portion 2616b, the first convex portion 2616a and the first concave portion 2616b being sequentially arranged at intervals in a circumferential direction of the first rotary drum; the number of the first protruding portions 2616a and the number of the first recessed portions 2616b may be set as needed, for example, the first cam 2616 may include one first protruding portion 2616a and one first recessed portion 2616b, two first protruding portions 2616a and two first recessed portions 2616b, three first protruding portions 2616a and three first recessed portions 2616b, or four first protruding portions 2616a and four first recessed portions 2616b, etc. In the present embodiment, the first cam 2616 includes three first protruding portions 2616a and three first recessed portions 2616b that are arranged at intervals in the circumferential direction of the first rotation barrel.

The second link member 265 further includes a second rotating portion 2651 rotatably connected to the connecting shaft 226, a second sliding portion 2653, and a second connecting portion 2655 connected between the second rotating portion 2651 and the second sliding portion 2653, and the second sliding rail 2650 is provided at a side portion of the second sliding portion 2653; specifically, the second rotating portion 2651 is a second rotating drum, the second rotating drum is provided with a second rotating hole 2652 along an axial direction thereof, the connecting shaft 226 is inserted into the second rotating hole 2652 of the second rotating drum, the second sliding portion 2653 is a rectangular plate, two opposite sides of the rectangular plate are respectively provided with a second sliding rail 2650, and the second sliding rail 2650 is perpendicular to the axial direction of the second rotating drum. One end of the second rotating portion 2651 is provided with a second cam 2656, and the second rotating portion 2651 is coaxial with the second cam 2656. The second cam 2656 includes a concave-convex surface provided at an end of the second rotary drum, the concave-convex surface including a second convex portion 2656a and a second concave portion 2656b, the second convex portion 2656a and the second concave portion 2656b being sequentially arranged at intervals along a circumferential direction of the second rotary drum; the number of the second protruding portions 2656a and the number of the second recessed portions 2656b may be set according to need, for example, the second cam 2656 may include one second protruding portion 2656a and one second recessed portion 2656b, two second protruding portions 2656a and two second recessed portions 2656b, three second protruding portions 2656a and three second recessed portions 2656b, or four second protruding portions 2656a and four second recessed portions 2656b, and the like. In the present embodiment, the second cam 2656 includes three second convex portions 2656a and three second concave portions 2656b arranged at intervals in the circumferential direction of the second rotary cylinder.

The first link member 261 includes a first abutment screw surface 2617a and a second abutment screw surface 2617b, the second link member 265 includes a third abutment screw surface 2657a and a fourth abutment screw surface 2657b, the first slider 281 includes a first screw surface 2801 and a second screw surface 2804 on opposite sides thereof, the second slider 283 includes a third screw surface 2803 and a fourth screw surface 2806 on opposite sides thereof, the first abutment screw surface 2617a is engaged with the first screw surface 2801, the second abutment screw surface 2617b is engaged with the third screw surface 2803, the third abutment screw surface 2657a is engaged with the second screw surface 2804, and the fourth abutment screw surface 2657b is engaged with the fourth screw surface 2806; the first spiral 2801 is counter-rotated to the second spiral 2804, the third spiral 2803 is counter-rotated to the fourth spiral 2806, the first abutment spiral 2617a is counter-rotated to the second abutment spiral 2617b, the axis of the first abutment spiral 2617a is collinear with the axis of the second abutment spiral 2617b, the directions of rotation of the third abutment spiral 2657a and the fourth abutment spiral 2657b are counter-rotated, and the axis of the third abutment spiral 2657a is collinear with the axis of the fourth abutment spiral 2657 b. When the first link member 261 rotates around the connection shaft 226, the first and second abutment screw surfaces 2617a and 2617b slidably abut against the first and third screw surfaces 2801 and 2803, respectively, so that the first and second sliding members 281 and 283 slide along the axial direction of the connection shaft 226, and the second and fourth screw surfaces 2804 and 2806 slidably abut against the third and fourth abutment screw surfaces 2657a and 2657b, respectively, so that the second link member 265 rotates synchronously around the corresponding connection shaft 226; when the second link member 265 rotates around the connection shaft 226, the third abutment screw face 2657a and the fourth abutment screw face 2657b slidably abut against the second screw face 2804 and the fourth screw face 2806, respectively, so that the first slider 281 and the second slider 283 slide along the axial direction of the connection shaft 226, and the first screw face 2801 and the third screw face 2803 slidably abut against the first abutment screw face 2617a and the second abutment screw face 2617b, respectively, so that the first link member 261 rotates synchronously around the corresponding connection shaft 226; that is, the link assembly 28 moves in the axial direction of the connection shaft 226 so that the first link 261 and the second link 265 are folded or unfolded with each other in synchronization with the rotation of the base 220.

The first link 261 is provided with a first accommodating groove 2617, and one side of the link assembly 28 is penetrated through one of the connecting shafts 226 and accommodated in the first accommodating groove 2617; the second link member 265 has a second receiving groove 2657, and the other opposite side of the link assembly 28 is disposed through the other connecting shaft 226 and is received in the first receiving groove 2617. Specifically, the outer circumferential surface of the first rotating portion 2611 is provided with a first receiving groove 2617, the first receiving groove 2617 extends to the first connecting portion 2615 in the radial direction of the first rotating portion 2611, and the first receiving groove 2617 communicates with the first rotating hole 2612; the first abutment screw surface 2617a and the second abutment screw surface 2617b are respectively provided at opposite ends of the first receiving groove 2617 in the axial direction of the connecting shaft 226, specifically, the first abutment screw surface 2617a is provided at an inner end surface of the first receiving groove 2617 near the first cam 2616, and the second abutment screw surface 2617b is provided at an inner end surface of the first receiving groove 2617 far from the first cam 2616. The outer circumferential surface of the second rotating portion 2651 is provided with a second receiving groove 2657, the second receiving groove 2657 extends to the second connecting portion 2655 in the radial direction of the second rotating portion 2651, and the second receiving groove 2657 communicates with the second rotating hole 2652; the third supporting spiral surface 2657a and the fourth supporting spiral surface 2657b are respectively arranged at two opposite ends of the second accommodating groove 2657 along the axial direction of the connecting shaft 226; specifically, the third abutment screw face 2657a is disposed on the inner end face of the second receiving groove 2657 close to the second cam 2656, and the fourth abutment screw face 2657b is disposed on the inner end face of the second receiving groove 2657 remote from the second cam 2656. The axis of the first abutment screw surface 2617a, the axis of the second abutment screw surface 2617b and the rotation axis of the first rotation portion 2611 are collinear; the axis of the third abutment screw face 2657a, the axis of the fourth abutment screw face 2657b, and the rotation axis of the second rotating portion 2651 are collinear. The first rotating portion 2611 is a first rotating tube rotatably fitted around the connecting shaft 226, the first receiving groove 2617 is provided on an outer peripheral wall of the first rotating tube, the second rotating portion 2651 is a second rotating tube rotatably fitted around the connecting shaft 226, and the second receiving groove 2657 is provided on an outer peripheral wall of the second rotating tube. The first supporting spiral surface 2617a and the second supporting spiral surface 2617b rotate around the axis of the first rotating cylinder for less than one circle respectively, a first stop block 2618 is arranged in the first accommodating groove 2617 of the first link member 261, the first stop block 2618 is connected with the first connecting portion 2615 and one end of the first supporting spiral surface 2617a, and the first stop block 2618 is close to the front face of the first connecting portion 2615; The third abutting spiral surface 2657a and the fourth abutting spiral surface 2657b rotate around the axis of the second rotating cylinder 2651 for less than one turn, a second stop block 2658 is arranged in the second accommodating groove 2657 of the second link member 265, the second stop block 2658 is connected to the second connecting portion 2655 and one end of the third abutting spiral surface 2657a, and the second stop block 2658 is close to the front face of the second connecting portion 2655.

The first sliding piece 281 further comprises first sliding drums 2811 located on two opposite sides of the first sliding piece, the first spiral surface 2801 and the second spiral surface 2804 are respectively arranged at one ends of the two first sliding drums 2811, which are away from the second sliding piece 283, and the axes of the first spiral surface 2801 and the axes of the second spiral surface 2804 are respectively collinear with the axes of the two first sliding drums 2811; the second sliding member 283 further includes second sliding drums 2831 disposed on opposite sides thereof, and the third spiral surface 2803 and the fourth spiral surface 2806 are respectively disposed at one ends of the two second sliding drums 2831 facing away from the first sliding member 281, and axes of the second spiral surface 2804 and axes of the fourth spiral surface 2806 are respectively collinear with axes of the two second sliding drums 2831. The first link member 261 and the second link member 265 are rotatable about the corresponding connection shafts 226, respectively, but neither the first link member 261 nor the second link member 265 is movable in the axial direction of the connection shafts 226, and the link assembly 28 is movable only in the axial direction of the connection shafts 226 and is not rotatable about the connection shafts 226. When the first link member 261 rotates around the corresponding connection shaft 226, the first and second abutment screw surfaces 2617a and 2617b slidably abut against the first and third screw surfaces 2801 and 2803, respectively, so that the link assembly 28 moves in the axial direction of the connection shaft 226, and at the same time, the second and fourth screw surfaces 2804 and 2806 of the link assembly 28 slidably abut against the third and fourth abutment screw surfaces 2657a and 2657b of the second link member 265, respectively, and since the first and second link members 261 and 265 cannot move in the axial direction, the first and second link members 261 and 265 can be folded or unfolded by the sliding of the link assembly 28 along the connection shaft 226.

The first slider 281 further comprises a first connection plate 2813 connected between two first slide cylinders 2811, the two first slide cylinders 2811 being spaced apart in parallel; the second slider 283 also includes a second connecting plate 2833 connected between the two second barrels 2831, the two second barrels 2831 being spaced apart in parallel. The pair of connecting shafts 226 are respectively inserted into the two first slide cylinders 2811 and the two second slide cylinders 2831. The first spiral surface 2801 is arranged on one side of one first sliding barrel 2811 close to the first connecting plate 2813, and the first spiral surface 2801 rotates for less than one circle around the axis of the first sliding barrel 2811; the second spiral surface 2804 is arranged on one side of the other first sliding barrel 2811 close to the first connecting plate 2813, and the second spiral surface 2804 rotates for less than one turn around the axis of the first sliding barrel 2811; the third spiral surface 2803 is arranged on one side of one second sliding barrel 2831 close to the second connecting plate 2833, and the second spiral surface 2804 rotates less than one turn around the axis of the second sliding barrel 2831; the fourth screw 2806 is disposed on the other second barrel 2831 near the second connecting plate 2833, and the fourth screw 2806 rotates less than one turn around the axis of the second barrel 2831. The first slider 281 is provided with a third stop 2816 at a side close to the first spiral surface 2801, and when the first link member 261 and the second link member 265 are in a fully folded state, the first stop 2618 of the first link member 261 and the second stop 2658 of the second link member 265 respectively abut against the third stop 2816 to prevent the first link member 261 and the second link member 265 from being further folded.

At least one elastic part 284 is disposed between the first sliding part 281 and the second sliding part 283, the at least one elastic part 284 is connected to the first sliding part 281, and the elastic part 284 abuts against the second sliding part 283; or at least one elastic portion 284 is connected to the second sliding member 283, and the elastic portion 284 abuts against the first sliding member 281. In the present embodiment, the elastic portion 284 includes a first elastic portion 2840 disposed on the first sliding member 281 and a second elastic portion 2845 disposed on the second sliding member 283, wherein a side of the first elastic portion 2840 away from the first sliding member 281 abuts against the second sliding member 283, and a side of the second elastic portion 2845 away from the second sliding member 283 abuts against the first sliding member 281. That is, a first elastic portion 2840 and a second elastic portion 2845 are disposed between the first slider 281 and the second slider 283, the first elastic portion 2840 is connected to the first slider 281 and abuts against the second slider 283, and the second elastic portion 2840 is connected to the second slider 283 and abuts against the first slider 281. In some embodiments, the first elastic portion 2840 and the second elastic portion 2845 are both connected to the first slider 281, and the first elastic portion 2840 and the second elastic portion 2845 are both abutted against the second slider 283. In some embodiments, the first elastic portion 2840 and the second elastic portion 2845 are connected to the second slider 283, and the first elastic portion 2840 and the second elastic portion 2845 are abutted against the first slider 281. The first elastic portion 2840 and the second elastic portion 2840 may be made of elastic materials such as but not limited to elastic rubber, elastic plastic or elastic silica gel.

In some embodiments, the second elastic portion 2845 may be omitted, and only the first sliding member 281 is provided with the first elastic portion 2840, and the first elastic portion 2840 abuts against the second sliding member 283.

In some embodiments, the first elastic portion 2840 may be omitted, and only the second sliding member 283 is provided with the second elastic portion 2845, and the second elastic portion 2845 abuts against the first sliding member 281.

Specifically, the first sliding member 281 further includes a first surface 2815 facing the second sliding member 283, the second sliding member 283 includes a second surface 2835 facing the first sliding member 281, the first elastic portion 2840 is disposed on the first surface 2815, the first elastic portion 2840 abuts against the second surface 2835, the second elastic portion 2845 is disposed on the second surface 2835, and the second elastic portion 2845 abuts against the first surface 2815. A first gap 2841 is provided between the first elastic portion 2840 and the first surface 2815, and a second gap 2846 is provided between the second elastic portion 2845 and the second surface 2835; when the first elastic portion 2840 is pressed by the first slider 281 and the second slider 283, the first elastic portion 2840 is elastically deformed to have an elastic force, and the shape of the first gap 2841 is changed; when the second elastic portion 2845 is pressed by the first slider 281 and the second slider 283, the second elastic portion 2845 is elastically deformed to have elastic force, and the shape of the second gap 2846 is changed.

Optionally, the first elastic portion 2840 and the second elastic portion 2845 are offset from each other; specifically, the first elastic portion 2840 is disposed on a surface of the first connection plate 2813 facing the second slider 283, and the first elastic portion 2840 is close to a back surface of the first connection plate 2813; the second elastic portion 2845 is disposed on a surface of the second connection plate 2833 facing the first slider 281, and the second elastic portion 2845 is close to a front surface of the second connection plate 2833. When the first sliding member 281 and the second sliding member 283 are both sleeved on the pair of connecting shafts 226, the first elastic portion 2840 and the second elastic portion 2845 are offset from each other, so that the first elastic portion 2840 can abut against the second sliding member 283, and the second elastic portion 2845 can abut against the first sliding member 281.

The elastic part 284 includes a pushing block and a supporting block, wherein one end of the supporting block is connected to the pushing block, one end of the supporting block, which is away from the pushing block, is connected to the first sliding piece 281, and the pushing block is propped against the second sliding piece 283; or one end of the supporting block, which is away from the pushing block, is connected to the second sliding member 283, and the pushing block abuts against the first sliding member 281. Specifically, the first elastic portion 2840 includes a first pushing block 2842 and a first supporting block 2843 connected to the first pushing block 2842, wherein an end of the first supporting block 2843 away from the first pushing block 2842 is connected to the first sliding member 281, and the first pushing block 2842 is used for pushing the second sliding member 283; optionally, the first supporting block 2843 is connected to the first surface 2815 of the first sliding member 281, and the first pushing block 2842 abuts against the second surface 2835 of the second sliding member. The second elastic portion 2845 includes a second pushing block 2847 and a second supporting block 2848 connected to the second pushing block 2847, wherein an end of the second supporting block 2848 away from the second pushing block 2847 is connected to the second sliding member 283, and the second pushing block 2847 is used for pushing the first sliding member 281; optionally, the second supporting block 2848 is connected to the second surface 2835 of the second slider 283, and the second pushing block 2848 abuts against the first surface 2815 of the first slider. The first surface 2815, the first supporting block 2843 and the first pushing block 2842 enclose a first gap 2841; the second surface 2835, the second supporting block 2848 and the second pushing block 2848 define a second gap 2846.

Optionally, the elastic portion 284 includes a strip-shaped pushing block and supporting blocks disposed at two opposite ends of the pushing block, one end of the supporting block away from the pushing block is connected to the first sliding member 281, and a gap is formed between the pushing block and a surface of the first sliding member 281 facing the second sliding member 283; or one end of the supporting block away from the pushing block is connected to the second sliding member 283, and a gap is formed between the pushing block and the surface of the second sliding member 283 facing the first sliding member 281. Specifically, the first pushing block 2842 is in a strip shape, the length direction of the first pushing block 2842 is parallel to the first surface 2815, two opposite ends of the first pushing block 2842 are respectively provided with a first supporting block 2843, and one end of each first supporting block 2843 far away from the first pushing block 2842 is connected to the first surface 2815; the second pushing block 2847 is strip-shaped, and the length direction of the second pushing block 2847 is parallel to the second surface 2835, two opposite ends of the second pushing block 2842 are respectively provided with a second supporting block 2848, and one end of each second supporting block 2848, which is far away from the second pushing block 2847, is connected to the second surface 2835.

Alternatively, the push block is parallel to the surface of the first slider 281 facing the second slider 283, or the push block is parallel to the surface of the second slider 283 facing the first slider 281, the support block being inclined with respect to the push block. Specifically, the first pushing block 2842 is parallel to the first surface 2815 of the first slider 281, the first supporting block 2843 is in a bar shape, the first supporting block 2843 is inclined to the first surface 2815, and the first supporting block 2843 is inclined with respect to the first pushing block 2842; the second pushing block 2847 is parallel to the second surface 2835 of the second slider 283, the second supporting block 2848 is in a bar shape, the second supporting block 2848 is inclined to the second surface 2835, and the second supporting block 2848 is inclined with respect to the second pushing block 2847. In the present embodiment, the distance between the two connection points of the two first supporting blocks 2843 and the first sliding member 281 is larger than the length of the first pushing block 2842, and the distance between the two connection points of the two second supporting blocks 2848 and the second sliding member 283 is larger than the length of the second pushing block 2848. In some embodiments, the distance between the two first support blocks 2843 and the two connections of the first slider 281 is less than or equal to the length of the first push block 2842. In some embodiments, the spacing between the two connection points of the two second supporting blocks 2848 and the second slider 283 is less than or equal to the length of the second pushing block 2847. The first elastic portion 2840 and the second elastic portion 2845 are elastically clamped between the first slider 281 and the second slider 283, and the first elastic portion 2840 and the second elastic portion 2845 push the first slider 281 and the second slider 283 so that the first spiral surface 2801 and the second spiral surface 2804 of the first slider 281 rotationally push against the first push spiral surface 2617a of the first link member 261 and the third push spiral surface 2657a of the second link member 265, respectively, and the third spiral surface 2803 and the fourth spiral surface 2806 of the second slider 283 rotationally push against the second push spiral surface 2617b of the first link member 261 and the fourth push spiral surface 2657b of the second link member 265, respectively. The provision of the elastic portion 284 between the first slider 281 and the second slider 283 not only facilitates the installation of the linkage assembly 28 and the first and second link members 261 and 265, but also eliminates errors between the first spiral surface 2801 and the first abutment spiral surface 2617a, errors between the third spiral surface 2803 and the second abutment spiral surface 2617b, errors between the second spiral surface 2804 and the third abutment spiral surface 2657a, and errors between the fourth spiral surface 2806 and the fourth abutment spiral surface 2657b, so that the first and second link members 261 and 265 can smoothly rotate with respect to the linkage assembly 28.

As shown in fig. 10-13 and fig. 15-16, the rotating shaft device 22 further includes a damping mechanism 29, the damping mechanism 29 includes a supporting member 291 and an elastic member 294, the supporting member 291 is slidably connected to the pair of connecting shafts 226 along the axial direction of the connecting shafts 226, the supporting member 291 is engaged with the first connecting rod 261 and/or the second connecting rod 265 through a cam, and the elastic member 294 is used for supporting the supporting member 291 and the first connecting rod 261 and/or the second connecting rod 265 against each other. In this embodiment, the supporting member 291 is engaged with the first link member 261 and the second link member 265 by a cam, and the elastic member 294 pushes the supporting member 291 against the first link member 261 and the second link member 265. When the first link member 261 and/or the second link member 265 rotate about the corresponding connection shaft 226, the abutting member 291 has a frictional resistance with the first link member 261 and the second link member 265, which can hinder the first link member 261 and the second link member 265 from rotating about the corresponding connection shaft 226, respectively. Specifically, the supporting member 291 includes two supporting cams 2910 sleeved on the pair of connecting shafts 226, wherein one connecting shaft 226 is inserted through one of the first cams 2616 of the first connecting rod 261 and the supporting cams 2910 of the supporting member 291, the other connecting shaft 226 is inserted through the second cams 2656 of the second connecting rod 265 and the other supporting cams 2910 of the supporting member 291, and the two supporting cams 2910 are respectively rotatably supported by the first cams 2616 of the first connecting rod 261 and the second cams 2656 of the second connecting rod 265. In this embodiment, the holding member 291 includes two holding cylinders 292 disposed on opposite sides thereof, the two holding cylinders 292 are respectively slidably sleeved on the pair of connecting shafts 226, the first rotating cylinder 2611 is rotatably sleeved on one of the connecting shafts 226, the first rotating cylinder 2611 is engaged with one of the holding cylinders 292 through a cam, the second rotating cylinder 2651 is rotatably sleeved on the other connecting shaft 226, and the second rotating cylinder 2651 is engaged with the other holding cylinder 292 through a cam. The holding member 291 further includes a connecting portion 293 connected between the two holding cylinders 292, the axes of the two holding cylinders 292 are spaced apart in parallel, and the two holding cylinders 292 can be slidably sleeved on the pair of connecting shafts 226 respectively.

An end of each of the holding cylinders 292 facing the first link member 261 is provided with a holding cam 2910, that is, the holding cam 2910 is provided at an end of the holding cylinder 292 facing away from the elastic member 294. Each of the abutment cams 2910 includes a concave-convex surface disposed at an end of the abutment cylinder 292 facing away from the elastic member 294, where the concave-convex surface includes a third protrusion 2911 and a third recess 2913, and the third protrusion 2911 and the third recess 2913 are sequentially arranged at intervals along the circumferential direction of the abutment cylinder 292. The number of third protrusions 2911 and the number of third recesses 2913 may be set as required, for example, the abutment cam 2910 may include one third protrusion 2911 and one third recess 2913, two third protrusions 2911 and two third recesses 2913, three third protrusions 2911 and three third recesses 2913, or four third protrusions 2911 and four third recesses 2913, and the like. In this embodiment, the abutment cam 2910 includes three third protrusions 2911 and three third recesses 2913 arranged at intervals along the circumferential direction of the abutment cylinder 292. One of the abutment cams 2910 has an axis collinear with the axis of the corresponding abutment cylinder 292, and the other abutment cam 2910 has an axis collinear with the axis of the corresponding abutment cylinder 292.

In some embodiments, one of the abutment cams 2910 on the two abutment cylinders 292 may be omitted, and the first cam 2616 of the first link member 261 or the second cam 2656 of the second link member 265 may be omitted.

Referring to fig. 5-23, when the rotating shaft device 22 is assembled, the first rotating cylinder 2514 of the first rotating member 251 is accommodated in the first avoidance opening 2521a of the first connecting member 252, such that the first shaft hole 2515 is opposite to the first connecting hole 2521b, and one of the first rotating shafts 253 is inserted into the first shaft hole 2515 and the second connecting hole 2521b, such that the first rotating member 251 is rotationally connected with the first connecting member 252; the second rotating cylinder 2564 of the second rotating member 256 is accommodated in the second avoidance opening 2571a of the second connecting member 257 such that the second shaft hole 2565 is opposite to the second connecting hole 2571b, and the other first rotating shaft 253 is inserted into the second shaft hole 2565 and the second connecting hole 2571b, so that the second rotating member 256 is rotationally connected with the second connecting member 257. Assembling the first rotation mechanism 250 and the second rotation mechanism 255 to the base 220, specifically, placing the first transmission portion 2511 of the first rotation mechanism 250 in the first rotation assisting groove 2215 of the base 220, so that the third circular arc rail 2510 at one end of the first transmission portion 2511 is rotatably accommodated in the third circular arc groove 2211; the second transmission portion 2561 of the second rotation mechanism 255 is disposed in the second rotation assisting groove 2216 of the base 220, so that the fourth circular arc rail 2560 of the second transmission portion 2561 is rotatably accommodated in the fourth circular arc groove 2213; the positioning member 24 is assembled to the third mounting portion 225 of the base 220, the two positioning portions 242 of the positioning member 24 are respectively disposed on the two supporting pieces 2253, so that the connecting bar 2251 is slidably received in the guiding groove 2452 of the positioning member 24, the two guiding rails 2255 are respectively slidably received in the two sliding grooves 246 of the positioning member 24, and the third circular arc rail 2510 of the first rotating member 251 at the end facing away from the first protruding block 2212 and the fourth circular arc rail 2560 of the second rotating member 256 at the end facing away from the first protruding block 2212 are respectively rotatably received in the two fifth circular arc grooves 2421 of the positioning member 24. Assembling the linkage assembly 28 and the damping mechanism 29 to the base 220, specifically, connecting the first sliding member 281 and the second sliding member 283 together, such that the first elastic portion 2840 abuts against the second sliding member 283, the second elastic portion 2845 abuts against the first sliding member 281, and the axes of the two first sliding drums 2811 are respectively collinear with the axes of the two second sliding drums 2831; The opposite sides of the linkage assembly 28 are respectively accommodated in the first accommodating groove 2617 and the second accommodating groove 2657, specifically, the first slide cylinder 2811 and the second slide cylinder 2831 at one side of the linkage assembly 28 are accommodated in the first accommodating groove 2617 of the first link member 261, one of the connecting shafts 226 is inserted into the first rotating hole 2612 of the first rotating portion 2611, the inner cavity of the second slide cylinder 2831 and the inner cavity of the first slide cylinder 2811, so that one end of the connecting shaft 226 extends out of the first cam 2616, the first slide cylinder 2811 and the second slide cylinder 2831 at the opposite side of the linkage assembly 28 are accommodated in the second accommodating groove 2657 of the second link member 265, Inserting the other connecting shaft 226 into the second rotating hole 2652 of the second rotating portion 2651, the inner cavity of the second slide barrel 2831 and the inner cavity of the first slide barrel 2811, so that one end of the connecting shaft 226 extends out of the second cam 2656; The two holding cylinders 292 of the holding member 291 are slidably sleeved on the pair of connecting shafts 226, so that the two holding cams 2910 of the holding member 291 respectively cooperate with the first cam 2616 of the first connecting rod member 261 and the second cam 2656 of the second connecting rod member 265; the two elastic members 294 are respectively sleeved on the pair of connecting shafts 226, so that one ends of the two elastic members 294 respectively abut against the two supporting cylinders 292 of the supporting member 291; the linkage assembly 28 and the damping mechanism 29 are connected to the second mounting portion 223 of the base 220, the ends of the pair of connecting shafts 226, which are close to the elastic members 294, are respectively inserted into the two avoidance holes 2424 of the positioning member 24, and the ends of the pair of connecting shafts 226, which are far from the elastic members 294, are respectively inserted into the two connecting holes 2234 of the positioning plate 2233; The first sliding rail 2610 of the first link member 261 is slidably inserted into the first sliding groove 2520 of the first link member 252, and the second sliding rail 2650 of the second link member 265 is slidably inserted into the second sliding groove 2570 of the second link member 257; attaching the middle support 230 to the front surface of the base 220, placing the first side support 232 and the second side support 234 on the front surface of the first rotating mechanism 250 and the front surface of the second rotating mechanism 255, respectively, so that the first adjusting shaft 2516 of the first rotating member 251 is rotatably and slidably inserted into the first adjusting slot 2320 of the first side support plate 232, and the first circular arc rail 2522 of the first connecting member 252 is rotatably accommodated in the first circular arc slot 2326 of the first side support plate 232; The second adjusting shaft 2566 of the second rotating member 256 is rotatably and slidably inserted into the second adjusting groove 2340 of the second side supporting plate 234, and the second circular arc rail 2572 of the second connecting member 257 is rotatably received in the second circular arc groove 2346 of the second side supporting plate 234.

At this time, one ends of the two elastic members 294 elastically abut against the positioning member 24 to abut against the first rotating member 251 and the second rotating member 256, such that the first rotating member 251 and the second rotating member 256 abut against the first bump 2212 and the second bump 2214, respectively; when the first rotating member 251 and the second rotating member 256 rotate relative to the base 220, there is a friction resistance between the first rotating member 251 and the base 220 and between the second rotating member 256 and the positioning member 24, and the first rotating member 251 and the second rotating member 256 are prevented from rotating relative to the base 220 by the friction resistance between the second rotating member 256 and the base 220, and the first rotating member 251 and the second rotating member 256 are limited relative to the base 220 without external force; the other ends of the two elastic members 294 elastically push against the holding member 291, so that the two pushing cams 2910 respectively push against the first cam 2616 of the first link member 261 and the second cam 2656 of the second link member 265, the end surface of the first rotating portion 2611 of the first link member 261 facing away from the first cam 2616 and the positioning piece 2233 push against each other, and the end surface of the second rotating portion 2651 of the second link member 265 facing away from the second cam 2656 and the positioning piece 2233 push against each other, so that the first link member 261 and the second link member 265 respectively rotate around the two connecting shafts 226 and cannot move in the axial direction of the connecting shafts 226, and frictional resistance between the first cam 2616 and the second cam respectively and the two pushing cams 2910, and frictional resistance between the first link member 261 and the second link member 265 respectively and the positioning piece 2233 limit 267 relative to the first positioning seat. The first elastic portion 2840 and the second elastic portion 2845 respectively push against the second slider 283 and the first slider 281, so that the first spiral surface 2801 and the second spiral surface 2804 of the first slider 281 respectively rotatably push against the first push against spiral surface 2617a of the first link member 261 and the third push against spiral surface 2657a of the second link member 265, and the third spiral surface 2803 and the fourth spiral surface 2806 of the second slider 283 respectively rotatably push against the second push against spiral surface 2617b and the fourth push against spiral surface 2657b of the first link member 261.

When the first and second side supports 232 and 234 are in the fully flattened state, the first and second adjustment shafts 2516 and 2566 are positioned at the first positioning segment 2323 of the first side support 232 and the third positioning segment 2343 of the second side support 234, respectively; The first and second rotating mechanisms 250 and 255 are in a completely flattened state, the first and second link members 261 and 265 are in a completely flattened state, the two elastic members 294 elastically push the pushing member 291 such that the two pushing cams 2910 of the pushing member 291 respectively push the first cam 2616 of the first link member 261 and the second cam 2656 of the second link member 265, such that the first and second link members 261 and 265 are limited with respect to the base 220, thereby limiting the first and second link members 261 and 265 from rotating and bending with respect to the base 220 to prevent the linkage assembly 28 from sliding with respect to the base 220, The first side support 232 and the second side support 234 are maintained in a stable, fully flattened condition with the front face of the first side support 232, the front face of the middle support 230, and the front face of the second side support 234 being coplanar. when the first side support 232 and the second side support 234 are in the fully folded state, the first adjusting shaft 2516 and the second adjusting shaft 2566 are positioned at the second positioning section 2324 of the first side support 232 and the fourth positioning section 2344 of the second side support 234, respectively; The first and second rotating mechanisms 250 and 255 are in a folded state, the first and second link members 261 and 265 are in a fully folded state, the two elastic members 294 elastically push the pushing members 291 such that the two pushing cams 2910 of the pushing members 291 respectively push the first cam 2616 of the first link member 261 and the second cam 2656 of the second link member 265, such that the first link member 261 and the second link member 265 are limited with respect to the base 220, thereby limiting the rotation flattening of the first link member 261 and the second link member 265 with respect to the base 220 to prevent the linkage assembly 28 from sliding with respect to the base 220, The first side support 232 and the second side support 234 are kept in a stable and fully folded state, and the front surface of the first side support 232, the front surface of the second side support 234 and the front surface of the middle support 230 enclose a water drop-shaped space so as to conveniently accommodate the bendable region 31 of the flexible screen 30. When the first and second side supporting members 232 and 234 are in the intermediate state, the first and second link members 261 and 265 are rotated synchronously with respect to the base 220 to bend at a specific angle, the link assembly 28 slides along the connecting shaft 226, the first and second rotating mechanisms 250 and 255 are rotated synchronously with respect to the base 220 to bend at a specific angle, the two elastic members 294 elastically push the push-holding members 291 against the first and second link members 261 and 265, so that the two push-holding cams 2910 have frictional resistance with the first and second cams 2616 and 2656 respectively, The first link member 261 and the second link member 265 have frictional resistance with the positioning piece 2233, and the first rotating member 251 and the second rotating member 256 have frictional resistance with the base 220 and the positioning member 24, respectively, and the first side supporting member 232 and the second side supporting member 234 can be maintained in any folded state except the fully flattened state and the fully folded state without receiving an external force, so that the electronic apparatus 100 is in any hovering state.

It should be noted that: the fully flattened state refers to the front face of the first side support 232 being coplanar with the front face of the second side support 234, i.e., the angle between the front face of the first side support 232 and the front face of the second side support 234 being 180 degrees; the fully folded state means that the front surface of the first side support 232 and the front surface of the second side support 234 enclose a water droplet-shaped space; the intermediate state refers to an arbitrary folded state in which the front surface of the first side support 232 and the front surface of the second side support 234 enclose a space other than the coplanar and drop-shaped space, that is, a folded state of the electronic device 100 in which an included angle between the front surfaces of the two housings 21 is in a range of more than 0 degrees and less than 180 degrees.

Referring to fig. 5-26, when the rotating shaft device 22 is bent from the flattened state, the first rotating mechanism 250 rotates along the corresponding first rotation axis L1 toward the second rotating mechanism 255 relative to the base 220, the two third arc rails 2510 of the first rotating member 251 rotate in the third arc groove 2211 of the base 220 and one of the fifth arc grooves 2421 of the positioning member 24, the first connecting member 252 drives the first connecting member 261 to rotate along the corresponding second rotation axis L2 toward the second connecting member 265 relative to the base 220, the first abutting spiral surface 2617a and the second abutting spiral surface 2617b slidably abut against the first spiral surface 2801 and the third spiral surface 2803 respectively, Sliding the linkage assembly 28 along the axial direction of the connecting shaft 226 in the first direction, so that the second spiral surface 2804 and the fourth spiral surface 2806 respectively slide against the third supporting spiral surface 2657a and the fourth supporting spiral surface 2657b of the second connecting rod piece 265, and the second connecting rod piece 265 and the first connecting rod piece 261 respectively rotate around the pair of connecting shafts 226 to be close to each other; The first link 261 and the second link 265 synchronously drive the first rotation mechanism 250 and the second rotation mechanism 255 to rotate around a pair of first rotation axes respectively and to be close to each other. Meanwhile, in the process of rotating the first rotating mechanism 250 and the second rotating mechanism 255 close to each other, the first connecting piece 252 and the first side supporting piece 232 rotate with each other through the cooperation of the first circular arc rail 2522 and the first circular arc groove 2326, and the first adjusting shaft 2516 of the first rotating piece 251 rotates and slides in the first adjusting groove 2320 of the first side supporting piece 232; the second connector 257 and the second side support 234 are rotated with each other by the cooperation of the second circular arc rail 2572 and the second circular arc groove 2346, and the second adjusting shaft 2566 of the second rotating member 256 rotates and slides in the second adjusting groove 2340 of the second side support 234; Specifically, the first adjusting shaft 2516 rotates and slides from the first positioning segment 2323 to the second positioning segment 2324 in the first adjusting slot 2320, and the second adjusting shaft 2566 rotates and slides from the third positioning segment 2343 to the fourth positioning segment 2344 in the second adjusting slot 2340, such that the first side supporting member 232 and the second side supporting member 234 on opposite sides of the middle supporting member 230 are brought close to each other until the first adjusting shaft 2516 is limited to the second positioning segment 2324 and the second adjusting shaft 2566 is limited to the fourth positioning segment 2344; the two abutting cams 2910 of the abutting piece 291 rotationally abut against the first cam 2616 and the second cam 2656 respectively until the first stop block 2618 and the second stop block 2658 stop against the third stop block 2816 respectively, so that the first link 261 and the second link 265 stop rotating, and the front face of the first side support 232 and the front face of the second side support 234 enclose a cross section into a water drop shape. The elastic portion 284 keeps elastically pushing the first slider 281 and the second slider 283 so that the first spiral surface 2801 and the second spiral surface 2804 respectively abut against the first abutting spiral surface 2617a and the third abutting spiral surface 2657a, and the third spiral surface 2803 and the fourth spiral surface 2806 respectively rotatably abut against the second abutting spiral surface 2617b and the fourth abutting spiral surface 2657b.

In other bending modes of the rotating shaft device 22, the second rotating mechanism 255 can be rotated along the corresponding first rotation axis L1 towards the first rotating mechanism 250 relative to the base 220, the two fourth circular arc rails 2560 of the second rotating member 256 respectively rotate in the fourth circular arc groove 2213 of the base 220 and the fifth circular arc groove 2421 corresponding to the positioning member 24, the second connecting member 257 drives the second connecting member 265 to rotate along the corresponding second rotation axis L2 towards the first connecting member 261 relative to the base 220, the second spiral surface 2804 and the fourth spiral surface 2806 respectively slide against the third abutting spiral surface 2657a and the fourth abutting spiral surface 2657b of the second connecting member 265, so that the linkage assembly 28 slides along the axial direction of the connecting shaft 226, such that the first spiral surface 2801 and the third spiral surface 2803 respectively slide against the first abutting spiral surface 2617a and the second abutting spiral surface 2617b of the first connecting member 261, such that the first connecting member 261 and the second connecting member 261 respectively rotate around the pair of connecting shafts 265; the first link 261 and the second link 265 synchronously drive the first rotation mechanism 250 and the second rotation mechanism 255 to rotate around the pair of connecting shafts 226 to approach each other. Meanwhile, in the process of rotating the first rotating mechanism 250 and the second rotating mechanism 255 close to each other, the first connecting piece 252 and the first side supporting piece 232 rotate with each other through the cooperation of the first circular arc rail 2522 and the first circular arc groove 2326, and the first adjusting shaft 2516 of the first rotating piece 251 rotates and slides in the first adjusting groove 2320 of the first side supporting piece 232; the second connector 257 and the second side support 234 are rotated with each other by the cooperation of the second circular arc rail 2572 and the second circular arc groove 2346, and the second adjusting shaft 2566 of the second rotating member 256 rotates and slides in the second adjusting groove 2340 of the second side support 234; specifically, the first adjusting shaft 2516 rotates and slides from the first positioning segment 2323 to the second positioning segment 2324 in the first adjusting slot 2320, and the second adjusting shaft 2566 rotates and slides from the third positioning segment 2343 to the fourth positioning segment 2344 in the second adjusting slot 2340, such that the first side supporting member 232 and the second side supporting member 234 on opposite sides of the middle supporting member 230 are brought close to each other until the first adjusting shaft 2516 is limited to the second positioning segment 2324 and the second adjusting shaft 2566 is limited to the fourth positioning segment 2344; the two abutting cams 2910 of the abutting piece 291 rotationally abut against the first cam 2616 and the second cam 2656 respectively until the first stop block 2618 and the second stop block 2658 stop against the third stop block 2816 respectively, so that the first link 261 and the second link 265 stop rotating, and the front face of the first side support 232 and the front face of the second side support 234 enclose a cross section into a water drop shape.

In other bending modes, the first rotating mechanism 250 and the second rotating mechanism 255 can be simultaneously rotated together in opposite directions relative to the base 220 about the two first rotation axes L1, the first adjusting shaft 2516 rotates and slides in the first adjusting groove 2320, and the second adjusting shaft 2566 rotates and slides in the second adjusting groove 2340, so that the first supporting piece 232 and the second supporting piece 234 are close to each other until the first adjusting shaft 2516 is limited to the second positioning section 2324 and the second adjusting shaft 2566 is limited to the fourth positioning section 2344; meanwhile, the first and second abutment screw surfaces 2617a and 2617b of the first link member 261 slidably abut against the first and third screw surfaces 2801 and 2803 of the link assembly 28, respectively, the third and fourth abutment screw surfaces 2657a and 2657b of the second link member 265 slidably abut against the second and fourth screw surfaces 2804 and 2806 of the link assembly 28, respectively, so that the link assembly 28 slides in the first direction along the axial direction of the connection shaft 226 until the first and second stop blocks 2618 and 2658 stop against the third stop block 2816, respectively, so that the first and second link members 261 and 265 stop rotating, and the front face of the first and second side supports 232 and 234 enclose a cross-sectional water drop shape.

During the bending process of the first side supporting member 232 and the second side supporting member 234 relative to the middle supporting member 230, the first circular arc rail 2522 on the first connecting member 252 and the second circular arc rail 2572 on the second connecting member 257 simultaneously rotate in the first circular arc groove 2326 on the first side supporting member 232 and the second circular arc groove 2346 on the second side supporting member 234, respectively, and simultaneously, the first adjusting shaft 2516 and the second adjusting shaft 2566 simultaneously rotate and slide in the first adjusting groove 2320 and the second adjusting groove 2340, respectively. Specifically, first adjustment shaft 2516 is displaced from first positioning segment 2323 to second positioning segment 2324 and second adjustment shaft 2566 is displaced from third positioning segment 2343 to fourth positioning segment 2344; The two third circular arc rails 2510 of the first transmission portion 2511 rotate in the third circular arc groove 2211 and the corresponding fifth circular arc groove 2421, respectively, and the two fourth circular arc rails 2560 of the second transmission portion 2561 rotate in the fourth circular arc groove 2213 and the corresponding fifth circular arc groove 2421, respectively; The first link member 261 and the second link member 265 are respectively rotated around the two connecting shafts 226 to be drawn close to each other, the first cam 2616 of the first link member 261 and the second cam 2656 of the second link member 265 are respectively rotatably abutted against the two abutment cams 2910 of the abutment member 291, simultaneously, the first abutment screw surface 2617a and the second abutment screw surface 2617b of the first link member 261 are respectively slidably abutted against the first screw surface 2801 and the third screw surface 2803, the third abutment screw surface 2657a and the fourth abutment screw surface 2657b of the second link member 265 are respectively slidably abutted against the second screw surface 2804 and the fourth screw surface 2806, So that the linkage assembly 28 slides along the axial direction of the connecting shaft 226 in the first direction, and synchronous folding of the first rotating member 251 and the second rotating member 256 is achieved. Therefore, the linkage mechanism of the rotating shaft device 22 is realized without adopting the meshing of gears, so that the structure of the rotating shaft device 22 is simple, the manufacturing cost is low, the whole volume of the rotating shaft device 22 is reduced, and the miniaturization development of products is facilitated; Next, when the first cam 2616 and the second cam 2656 are rotated with respect to the two abutting cams 2910, respectively, the frictional resistance between the first cam 2616 and the corresponding abutting cam 2910 and the frictional resistance between the second cam 2656 and the corresponding abutting cam 2910, the frictional resistance between the first link member 261 and the second link member 265 and the positioning piece 2233, respectively, and the frictional resistance between the first rotating member 251 and the second rotating member 256 and the base 220 and the positioning member 24, respectively, enable the first rotating member 251 and the second rotating member 256 to be positioned with respect to the base 220, The first link member 261 and the second link member 265 are positioned with respect to the base 220 such that the first rotation member 251 is positioned at any angle between 0 degrees and 90 degrees with respect to the middle support member 230 and the second rotation member 256 is positioned at any angle between 0 degrees and 90 degrees with respect to the middle support member 230; At the same time, the first and second side supports 232 and 234 are positioned at any angle between 0 degrees and 120 degrees, respectively, with respect to the middle support 230, so that the electronic device 100 can achieve a larger-angle hover; in addition, the elastic portion 284 keeps elastic pushing the first sliding member 281 and the second sliding member 283, so that the first spiral surface 2801 and the second spiral surface 2804 respectively push against the first push spiral surface 2617a and the third push spiral surface 2657a, and the third spiral surface 2803 and the fourth spiral surface 2806 respectively push against the second push spiral surface 2617b and the fourth push spiral surface 2657b, so that the rotating shaft device 22 has a better synchronous folding or unfolding effect.

When the rotation shaft device 22 is unfolded from the fully folded state, the movement process of each component is opposite to that when the rotation shaft device 22 is folded from the unfolded state, and the description is omitted.

Referring to fig. 1-6, the installed rotating shaft device 22 is disposed between the two frames 21, and two opposite sides of the rotating shaft device 22 are fixedly connected with the two frames 21 respectively. Specifically, the first side supporting member 232 and the second side supporting member 234 on opposite sides of the base 220 are respectively received in the mounting grooves 216 of the two frames 21, and the first connecting member 252 is connected to one of the frames 21, and the second connecting member 257 is connected to the other frame 21. At this time, the front surfaces 211 of the two frames 21, the front surfaces of the first side supports 232, the front surfaces of the middle supports 230, and the front surfaces of the second side supports 234 are coplanar. The back of the flexible screen 30 is connected to the front 211 of the two frames 21 and the front of the rotating shaft device 22; specifically, the bendable region 31 is attached to the front surface of the first side support 232, the front surface of the middle support 230, and the front surface of the second side support 234 of the rotating shaft device 22, and the two non-bending regions 33 are attached to the front surfaces 211 of the two frames 21, respectively. Because the overall volume of the rotating shaft device 22 is smaller, the rotating shaft device 22 occupies the internal space of the folding housing 20, which is beneficial to the layout of other components such as a motherboard or a battery, and the miniaturization and the thinning of the electronic device 100. In addition, the hinge device 22 enables the bendable region 31 of the flexible screen 30 to be positioned at any bending angle through the friction resistance between the supporting member 291 of the damping mechanism 29 and the first link member 261 and the second link member 265, the friction resistance between the first link member 261 and the second link member 265 and the positioning piece 2233, and the friction resistance between the first rotating member 251 and the second rotating member 256 and the base 220 and the positioning member 24, respectively, so that the two frames 21 can be freely adjusted in the unfolded state, the folded state and the intermediate state, i.e., the electronic device 100 can be positioned in the unfolded state, the folded state and any intermediate state.

Referring to fig. 1-6 and 22-25, when bending the electronic device 100, bending force is applied to at least one of the two frames 21 of the electronic device 100, so that the first connecting member 252 and the second connecting member 257 connected to the two frames 21 drive the first rotating member 251 and the second rotating member 256 to rotate relative to the base 220 in a direction toward each other, the side of the first side support 232 away from the middle support 230 rotates relative to the first connecting member 252, and the side of the first side support 232 near the middle support 230 is rotationally and slidingly connected with the first adjusting slot 2320 through the cooperation of the first adjusting shaft 2516, The side of the second side supporting member 234 far from the middle supporting member 230 rotates relative to the second connecting member 257, and the side of the second side supporting member 234 near to the middle supporting member 230 is cooperatively rotated with the second adjusting groove 2340 through the second adjusting shaft 2566 and slidingly connected, the first connecting member 252 and the second connecting member 257 respectively drive the first connecting member 261 and the second connecting member 265 to respectively rotate relative to the base 220 around the corresponding connecting shafts 226 to be mutually close, synchronous rotation of the first connecting member 261 and the second connecting member 265 relative to the base 220 is achieved through the linkage assembly 28, To achieve synchronous folding of the spindle means 22, the bendable region 31 of the flexible screen 30 bends with the spindle means 22. Specifically, if a bending force is applied to the frame 21 connected to the second connecting member 257, the frame 21 drives the second rotating member 256 to rotate around the first rotation axis L1 toward the side close to the flexible screen 30 relative to the base 220 by the second connecting member 257, the third abutment screw face 2657a and the fourth abutment screw face 2657b of the second connecting member 265 slidably abut against the second screw face 2804 and the fourth screw face 2806, respectively, so that the linkage assembly 28 slides along the axial direction of the connecting shaft 226 in the first direction, so that the first screw face 2801 and the third screw face 2803 slidably abut against the first abutment screw face 2617a and the second abutment screw face 2617b of the first connecting member 261, respectively, So that the first link member 261 and the second link member 265 respectively rotate synchronously about the pair of connecting shafts 226 to come close to each other. Meanwhile, the first link 261 drives the first connecting piece 252 to rotate relative to the base 220 around the corresponding first rotation axis L1, so as to realize that the first rotation mechanism 250 and the second rotation mechanism 255 synchronously rotate around the two first rotation axes L1 respectively and are close to each other; the first connecting piece 252 and the first side supporting piece 232 rotate through the cooperation of the first circular arc rail 2522 and the first circular arc groove 2326, and the first adjusting shaft 2516 of the first rotating piece 251 slides and rotates in the first adjusting groove 233 of the first side supporting piece 232; the second connector 257 and the second side support 234 rotate by the cooperation of the second circular arc rail 2572 and the second circular arc groove 2346, and the second adjusting shaft 2566 of the second rotating member 256 slides and rotates in the second adjusting groove 2340 of the second side support 234; The first side supporting member 232 and the second side supporting member 234 on opposite sides of the middle supporting member 230 are mutually closed until the first adjusting shaft 2516 is limited at the second positioning section 2324 and the second adjusting shaft 2566 is limited at the fourth positioning section 2344, and the first cam 2616 and the second cam 2656 respectively abut against the two abutting cams 2910 of the abutting member 291 to prevent the first link member 261 and the second link member 265 from rotating, and the first link member 261 and the second link member 265 limit the link assembly 28 to slide along the connecting shaft 226, so that the front face of the first side supporting member 232 and the front face of the second side supporting member 234 enclose a cross section into a water drop shape; The bendable region 31 of the flexible screen 30 is bent along with the rotating shaft device 22 until the bendable region 31 is bent into a water droplet shape, thereby realizing the folding of the electronic device 100.

When the electronic device 100 is flattened, a deployment force is applied to at least one of the two frames 21 of the electronic device 100, so that the first connection member 252 and the second connection member 257 connected to the two frames 21 drive the first rotation member 251 and the second rotation member 256 to rotate in directions away from each other relative to the base 220, the side of the first side support member 232 away from the middle support member 230 rotates relative to the first connection member 252, and the side of the first side support member 232 close to the middle support member 230 is rotationally and slidingly connected with the first adjustment slot 2320 through the cooperation of the first adjustment shaft 2516, The side of the second side support 234 away from the middle support 230 rotates relative to the second connector 257, and the side of the second side support 234 near the middle support 230 is rotationally and slidingly connected with the second adjusting slot 2340 through the second adjusting shaft 2566, so as to realize synchronous unfolding of the rotating shaft device 22, and the bendable region 31 of the flexible screen 30 is flattened along with the rotating shaft device 22. Specifically, if a spreading force is applied to the frame 21 connected to the first connection member 252, the frame 21 drives the first rotation member 251 to rotate around the first connection portion 241 relative to the base 220 about the corresponding first rotation axis L1 toward a side away from the flexible screen 30, and at the same time, the first connection member 252 drives the first connection member 261 to rotate around the corresponding connection axis 226 relative to the base 220 toward a side away from the flexible screen 30, the first abutment screw surface 2617a and the second abutment screw surface 2617b of the first connection member 261 slidably abut against the first screw surface 2801 and the third screw surface 2803 respectively, Sliding the linkage assembly 28 along the axial direction of the connecting shaft 226 in the second direction, so that the second spiral surface 2804 and the fourth spiral surface 2806 respectively slide against the third supporting spiral surface 2657a and the fourth supporting spiral surface 2657b of the second connecting rod piece 265, and the second connecting rod piece 265 and the first connecting rod piece 261 respectively rotate synchronously around the pair of connecting shafts 226 to be far away from each other; meanwhile, the second link member 265 drives the second connecting member 257 to rotate relative to the base 220 about the corresponding first rotation axis L1, so as to realize that the first rotation mechanism 250 and the second rotation mechanism 255 respectively rotate synchronously about the two first rotation axes L1 and are separated from each other, the first connecting member 252 and the first side supporting member 232 rotate in cooperation with the first circular arc groove 2326 through the first circular arc rail 2522, and the first adjusting shaft 2516 of the first rotation member 251 slides and rotates in the first adjusting groove 233 of the first side supporting member 232; the second connector 257 and the second side support 234 rotate by the cooperation of the second circular arc rail 2572 and the second circular arc groove 2346, and the second adjusting shaft 2566 of the second rotating member 256 slides and rotates in the second adjusting groove 2340 of the second side support 234; The first and second side supporting members 232 and 234 at opposite sides of the middle supporting member 230 are moved away from each other until the first and second adjusting shafts 2516 and 2566 are limited to the first and third positioning sections 2323 and 2343, and the first and second cams 2616 and 2656 respectively abut against the two abutment cams 2910 of the abutment member 291 to prevent the first and second link members 261 and 265 from rotating, the first and second link members 251 and 256 are limited to rotate by the first and second link members 261 and 265 to prevent the link assembly 28 from sliding along the link shaft 226 with respect to the base 220, So that the first side support 232 and the second side support 234 on opposite sides of the middle support 230 are mutually unfolded until the first side support 232 and the second side support 234 are flattened, and the bendable region 31 of the flexible screen 30 is unfolded along with the rotating shaft device 22 until the flexible screen 30 is completely flattened, thereby realizing flattening of the electronic device 100.

The rotating shaft device 22 of the electronic device 100 can realize synchronous folding or synchronous unfolding of the first side supporting piece 232 and the second side supporting piece 234 through the linkage assembly 28 arranged between the first connecting rod piece 261 and the second connecting rod piece 265, and is convenient to operate; the rotating shaft device 22 has fewer elements, simple structure and low manufacturing cost, reduces the internal space occupied by the rotating shaft device 22 in the folding shell 20, and is beneficial to the layout of other elements such as a main board or a battery. Second, the friction resistance between the first cam 2616 of the first link 261 and the second cam 2656 of the second link 265 and the two abutting cams 2910, the friction resistance between the first link 261 and the second link 265 and the positioning piece 2233, the friction resistance between the first rotating member 251 and the base 220 and the positioning piece 24, and the friction resistance between the second rotating member 256 and the base 220 and the positioning piece 24 respectively, so that the bendable region 31 of the flexible screen 30 is positioned at any bending angle, and the two frames 21 can be freely adjusted in the unfolded state, the folded state and any intermediate state, that is, the electronic device 100 can be positioned in the unfolded state, the folded state and any intermediate state, so that the two frames 21 of the electronic device 100 have a hovering function of 0 degrees to 180 degrees, and the hovering angle range is large.

The foregoing is a description of embodiments of the present invention, and it should be noted that, for those skilled in the art, modifications and variations can be made without departing from the principles of the embodiments of the present invention, and such modifications and variations are also considered to be within the scope of the present invention.

Claims

1. A spindle assembly, the spindle assembly comprising:

a base;

the connecting shafts are respectively arranged on two opposite sides of the base;

the first connecting rod piece is connected to one connecting shaft;

a second link member connected to the other of the connection shafts; and

The linkage assembly is arranged between the first connecting rod piece and the second connecting rod piece, and comprises a first sliding piece and a second sliding piece, the first sliding piece and the second sliding piece are connected to the pair of connecting shafts in a sliding manner, at least one of the first sliding piece and the second sliding piece is provided with an elastic part, and the elastic part is positioned between the first sliding piece and the second sliding piece; the first connecting rod piece is respectively connected with the first sliding piece and the second sliding piece in a matched manner through spiral surfaces, the second connecting rod piece is respectively connected with the first sliding piece and the second sliding piece in a matched manner through spiral surfaces, and the elastic part is used for pushing the first sliding piece and the second sliding piece so that the first sliding piece and the second sliding piece are respectively pushed against the first connecting rod piece and the second connecting rod piece; when the first connecting rod piece and/or the second connecting rod piece rotate around the axis of the corresponding connecting shaft, the first sliding piece and the second sliding piece slide along the axial direction of the connecting shaft so as to drive the first connecting rod piece and the second connecting rod piece to synchronously rotate relative to the base.

2. The rotating shaft device according to claim 1, wherein the elastic portion comprises a first elastic portion provided on the first sliding member and/or a second elastic portion provided on the second sliding member, a side of the first elastic portion facing away from the first sliding member abuts against the second sliding member, and a side of the second elastic portion facing away from the second sliding member abuts against the first sliding member.

3. The rotary shaft device according to claim 2, wherein the first sliding member includes a first surface facing the second sliding member, the second sliding member includes a second surface facing the first sliding member, the first elastic portion is disposed on the first surface, the first elastic portion abuts against the second surface, the second elastic portion is disposed on the second surface, and the second elastic portion abuts against the first surface.

4. A spindle assembly according to claim 2, wherein the first and second resilient portions are offset from one another.

5. The rotating shaft device according to claim 1, wherein the elastic portion includes a pushing block and a supporting block, one end of the supporting block is connected to the pushing block, one end of the supporting block, which is away from the pushing block, is connected to the first sliding member, and the pushing block is pushed against the second sliding member; or one end of the supporting block, which is away from the pushing block, is connected with the second sliding piece, and the pushing block is propped against the first sliding piece.

6. The rotating shaft device according to claim 1, wherein the elastic portion includes a strip-shaped pushing block and supporting blocks disposed at opposite ends of the pushing block, one end of the supporting block away from the pushing block is connected to the first sliding member, and a gap is formed between the pushing block and a surface of the first sliding member facing the second sliding member; or one end of the supporting block, which is far away from the pushing block, is connected to the second sliding piece, and a gap is formed between the pushing block and the surface, facing the first sliding piece, of the second sliding piece.

7. A spindle apparatus according to claim 5 or 6, wherein the abutment block is parallel to a surface of the first slider facing the second slider or the abutment block is parallel to a surface of the second slider facing the first slider, the support block being inclined relative to the abutment block.

8. The apparatus according to claim 1, wherein the first link member includes a first abutment screw surface and a second abutment screw surface, the second link member includes a third abutment screw surface and a fourth abutment screw surface, the first slider includes a first screw surface and a second screw surface on opposite sides thereof, the second slider includes a third screw surface and a fourth screw surface on opposite sides thereof, the first abutment screw surface is engaged with the first screw surface, the second abutment screw surface is engaged with the third screw surface, the third abutment screw surface is engaged with the second screw surface, and the fourth abutment screw surface is engaged with the fourth screw surface; the first spiral surface and the second spiral surface have opposite rotation directions, and the third spiral surface and the fourth spiral surface have opposite rotation directions.

9. The rotating shaft device according to claim 8, wherein the first link member further comprises a first rotating cylinder rotatably sleeved on the connecting shaft, a first accommodating groove is formed in an outer peripheral wall of the first rotating cylinder, and the first abutment screw surface and the second abutment screw surface are respectively arranged at opposite ends of the first accommodating groove along an axial direction of the connecting shaft; the second connecting rod piece further comprises a second rotating cylinder rotationally sleeved on the connecting shaft, a second accommodating groove is formed in the outer peripheral wall of the second rotating cylinder, and the third propping spiral surface and the fourth propping spiral surface are respectively arranged at two opposite ends of the second accommodating groove along the axial direction of the connecting shaft; the first sliding piece further comprises first sliding drums positioned on two opposite sides of the first sliding piece, and the first spiral surface and the second spiral surface are respectively arranged at one ends of the two first sliding drums, which are away from the second connecting rod piece; the second sliding piece further comprises second sliding drums positioned on two opposite sides of the second sliding piece, and the third spiral surface and the fourth spiral surface are respectively arranged at one ends of the two second sliding drums, which are away from the first connecting rod piece.

10. The rotating shaft device according to claim 1, further comprising a supporting member and an elastic member, wherein the supporting member is slidably connected to the pair of connecting shafts along the axial direction of the connecting shafts, the supporting member is engaged with the first connecting rod member and/or the second connecting rod member through a cam, and the elastic member is used for supporting the supporting member and the first connecting rod member and/or the second connecting rod member against each other.

11. The rotary shaft device according to claim 10, wherein the abutting member comprises two abutting cylinders on opposite sides thereof, the two abutting cylinders being slidably sleeved on the pair of connecting shafts, respectively; the first connecting rod piece comprises a first rotating cylinder which is rotationally sleeved on one connecting shaft, and the first rotating cylinder is matched with one supporting cylinder through a cam; the second connecting rod piece comprises a second rotating cylinder, the second rotating cylinder is rotationally sleeved on the other connecting shaft, and the second rotating cylinder is matched with the other supporting cylinder through a cam.

12. A folding casing, characterized in that the folding casing comprises a rotating shaft device according to any one of claims 1-11 and two frames, the rotating shaft device is located between the two frames, and two opposite sides of the rotating shaft device are respectively connected to the two frames.

13. An electronic device, comprising a flexible screen, two frames and a rotating shaft device according to any one of claims 1-11, wherein the rotating shaft device is located between the two frames, two opposite sides of the rotating shaft device are respectively connected to the two frames, and the flexible screen is connected to the two frames and the rotating shaft device.