CN117628043A

CN117628043A - Rotating shaft assembly, folding shell and electronic equipment

Info

Publication number: CN117628043A
Application number: CN202210999168.2A
Authority: CN
Inventors: 廖彬材; 谷一平; 李志�
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2024-03-01
Also published as: WO2024037165A1

Abstract

The invention provides a rotating shaft assembly, which comprises a base, a linkage piece, a first rotating piece, a second rotating piece and a damping mechanism, wherein the linkage piece is connected to the base and can slide relative to the base along a first direction, and the linkage piece comprises a first connecting part and a second connecting part; the first rotating piece and the second rotating piece are respectively arranged at two opposite sides of the base, the first rotating piece and the first connecting part are connected with the first transmission part in a matched rotation way through a first spiral groove, the second rotating piece and the second connecting part are connected with the second transmission part in a matched rotation way through a second spiral groove, and the rotation directions of the first spiral groove and the second spiral groove are opposite; the damping mechanism is propped against the first rotating piece and/or the second rotating piece so as to limit the rotation of the first rotating piece and the second rotating piece relative to the base. The invention also provides a folding shell and electronic equipment.

Description

Rotating shaft assembly, folding shell and electronic equipment

Technical Field

The invention relates to the field of electronic equipment, in particular to a rotating shaft assembly for supporting a flexible screen, a folding shell provided with the rotating shaft assembly 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 folding scheme of the flexible display screen of the present disclosure includes inner folding and outer folding, and the flexible display screen of the folding screen device in the related art is generally supported by a hinge mechanism. However, the existing hinge mechanism generally adopts two side support plates and a middle support plate to support the bendable flexible display screen, and has a complex structure, a large volume and a large occupied internal space of the folding screen device.

Disclosure of Invention

The application provides a pivot subassembly, be provided with pivot subassembly's folding casing and be equipped with folding casing's electronic equipment.

The application provides a pivot subassembly, it includes base, linkage piece, first rotation piece, second rotation piece and damping mechanism, the linkage piece connect in the base and can follow the first direction for the base slides, the linkage piece includes first connecting portion and second connecting portion; the first rotating piece is arranged on one side of the base, and the first rotating piece is connected with the first connecting part in a matched rotating way through a first spiral groove and a first transmission part; the second rotating piece is arranged on the other side opposite to the base, the second rotating piece is connected with the second connecting part in a matched rotating way through a second spiral groove and a second transmission part, and the rotation directions of the first spiral groove and the second spiral groove are opposite; the damping mechanism is propped against the first rotating piece and/or the second rotating piece so as to limit the rotation of the first rotating piece and the second rotating piece relative to the base.

The application also provides a folding casing, it includes pivot subassembly and two framework, the pivot subassembly is located two between the framework, the one end that the base was kept away from to the first rotation piece of pivot subassembly is connected in one of them framework, the one end that the base was kept away from to the second rotation piece of pivot subassembly is connected in another framework.

The application also provides electronic equipment, it includes flexible screen, two frameworks and pivot subassembly, the pivot subassembly is located two between the framework, the one end that the base was kept away from to the first rotating member of pivot subassembly is connected in one of them framework, the one end that the base was kept away from to the second rotating member of pivot subassembly is connected in another framework, flexible screen connect in two the framework reaches the pivot subassembly.

The linkage part of the rotating shaft assembly is arranged on the base in a sliding manner, the first rotating part is rotationally connected to the first connecting part through the cooperation of the first transmission part and the first spiral groove, and the second rotating part is rotationally connected to the second connecting part through the cooperation of the second transmission part and the second spiral groove; the first transmission part rotates relative to the first spiral groove or the second transmission part rotates relative to the second spiral groove, so that the first rotation piece and the second rotation piece can be synchronously folded or synchronously unfolded relative to the base, and the first side support piece and the second side support piece can be synchronously folded or synchronously unfolded. Compared with the prior art that the linkage can be realized only through the meshing of the gears, the rotating shaft assembly omits the gears, the gear mounting frame and other elements, so that the elements are reduced, the structure is simplified, the manufacturing cost is reduced, the volume of the rotating shaft assembly is reduced, the inner space of the folding shell occupied by the rotating shaft assembly is reduced, the layout of other elements such as a main board or a battery in the electronic equipment is facilitated, and the miniaturization development is facilitated; secondly, the damping mechanism is propped against the first rotating piece and/or the second rotating piece, and in the process of synchronously folding or synchronously unfolding the first side supporting piece and the second side supporting piece, the friction resistance between the damping mechanism and the first rotating piece and/or the friction resistance between the damping mechanism and the second rotating piece are/is formed, so that the first rotating piece and the second rotating piece are respectively positioned relative to the base, and the electronic equipment can hover.

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 to those of ordinary skill in the art that the drawings in the following description are of some embodiments of the invention and that other drawings may be derived from these drawings without undue effort.

Fig. 1 is a schematic perspective view of an electronic device in a first embodiment of the present 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 a schematic perspective view of another view of the spindle assembly of FIG. 4;

FIG. 6 is an exploded perspective view of the spindle assembly of FIG. 4;

FIG. 7 is a schematic perspective view of another view of the spindle assembly of FIG. 6;

FIG. 8 is a further exploded perspective view of the spindle assembly of FIG. 6;

FIG. 9 is a schematic perspective view of another view of the spindle assembly of FIG. 7;

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

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

FIG. 12 is an enlarged schematic view of the rotational mechanism and linkage of FIG. 10;

FIG. 13 is an enlarged schematic view of the rotational mechanism and linkage of FIG. 11;

FIG. 14 is an enlarged schematic view of the torsion mechanism and the base of FIG. 10;

FIG. 15 is an enlarged schematic view of the torsion mechanism and base of FIG. 11;

FIG. 16 is a partial perspective cross-sectional view of the spindle assembly of FIG. 4;

FIG. 17 is a cross-sectional view of the spindle assembly of FIG. 16;

FIG. 18 is another partial perspective cross-sectional view of the spindle assembly of FIG. 4;

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

FIG. 20 is another partial perspective cross-sectional view of the spindle assembly of FIG. 4;

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

FIG. 22 is another partial perspective cross-sectional view of the spindle assembly of FIG. 4;

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

FIG. 24 is another partial perspective cross-sectional view of the spindle assembly of FIG. 4;

FIG. 25 is a cross-sectional view of the spindle assembly of FIG. 24;

fig. 26 is a schematic perspective view of the electronic device of fig. 1 in a fully folded state;

FIG. 27 is a schematic perspective view of the spindle assembly of FIG. 26;

FIG. 28 is a schematic perspective view of another view of the spindle assembly of FIG. 27;

FIG. 29 is a partial perspective cross-sectional view of the spindle assembly of FIG. 27;

FIG. 30 is a cross-sectional view of the spindle assembly of FIG. 29;

FIG. 31 is another partial perspective cross-sectional view of the spindle assembly of FIG. 27;

FIG. 32 is a cross-sectional view of the spindle assembly of FIG. 31;

FIG. 33 is another partial perspective cross-sectional view of the spindle assembly of FIG. 27;

FIG. 34 is a cross-sectional view of the spindle assembly of FIG. 33;

FIG. 35 is another partial perspective cross-sectional view of the spindle assembly of FIG. 27;

FIG. 36 is another partial perspective cross-sectional view of the spindle assembly of FIG. 27;

FIG. 37 is a schematic perspective view of a spindle assembly according to a second embodiment of the present application;

FIG. 38 is a schematic perspective view of the spindle assembly of FIG. 37 from another perspective;

FIG. 39 is an exploded perspective view of the spindle assembly of FIG. 37;

FIG. 40 is a further exploded perspective view of the spindle assembly of FIG. 39;

FIG. 41 is a partial perspective cross-sectional view of the spindle assembly of FIG. 37;

FIG. 42 is a cross-sectional view of the spindle assembly of FIG. 41;

FIG. 43 is a schematic perspective view showing a folded state of a hinge assembly according to a third embodiment of the present application;

FIG. 44 is an exploded perspective view of the spindle assembly of FIG. 43;

FIG. 45 is a partial perspective cross-sectional view of the spindle assembly of FIG. 43.

The main reference numerals illustrate: 100. an electronic device; 30. a flexible screen; 31. a bendable region; 33. a non-bending region; 20. folding the shell; 21. a frame; 211. a front face; 214. a side surface; 215. an end face; 216. a mounting groove; 22. a spindle assembly; 23. a base; 230. a front face; 2303. a notch; 2306. a slide guide part; 2307. an accommodating space; 231. a first guide groove; 2310. a first receiving groove; 2320. a second accommodating groove; 2312. a first positioning portion; 2313. a first connection groove; 2314. a first accommodation hole; 2315. a first stop groove; 2323. a second connecting groove; 232. a second guide groove; 2322. a second positioning portion; 2323. a second connecting groove; 2324. a second accommodation hole; 2325. a second stop groove; 234. a guide chute; 236. a connecting block; 2361. a clearance groove; 2363. a first lug; 2364. a second lug; 237. a first limit groove; 2371. a first limiting surface; 2373. a third circular arc groove; 238. the second limit groove; 2381. the second limiting surface; 2383. a fourth circular arc groove; 25. a rotating mechanism; 250. a linkage member; 2511. a sliding plate; 2512. a first clearance groove; 2513. a second clearance groove; 2515. a guide rail; 2516. a chute; 2501. a first connection portion; 2502. a second connecting portion; 2503. a first circular arc plate; 2503a, first inner arcuate surface; 2503b, first outer arcuate surface; 2504. a first helical groove; 2505. a second helical groove; 2506. a second arc plate; 2506a, second inner arcuate surface; 2506b, second outer arcuate surface; 2507. a first helicoid; 2508. a second helicoid; 253. a first rotating member; 2531. a first transmission part; 2532. a first supporting surface; 2533. a first connection portion; 2534. a first support portion; 2535. a first circular arc groove; 2536. a first rotating plate; 2536a, a first limiting part; 2536b, a second limiting part; 2536c, a first damping portion; 2537. a first rotation surface; 2538. a first stop plate; 2538a, a first rotating groove; 2539. a third circular arc rail; 255. a second rotating member; 2551. a second transmission part; 2552. a second abutting surface; 2553. a second connecting portion; 2554. a second supporting part; 2555. a second circular arc groove; 2556. a second rotating plate; 2556a, a third limit part; 2556b, a fourth limit portion; 2556c, a second damping portion; 2557. a second rotation surface; 2558. a second stop plate; 2558a, a second rotating groove; 2559. a fourth circular arc rail; 27. a support mechanism; 273. a first side support; 2730. a first side support plate; 2731. a first circular arc rail; 2733. a first adjustment tank; 2734. a first adjustment arm; 2733a, a first positioning segment; 2733b, a second positioning segment; 2736. a first escape opening; 275. a second side support; 2750. a second side support plate; 2751. a second circular arc rail; 2754. a second adjustment arm; 2753. a second regulating groove; 2753a, a third positioning segment; 2753b, fourth locating section; 2756. a second clearance port; 24. a damping mechanism; 240. a first abutment; 2401. a first fixing portion; 241. a first guide rail; 242. a first abutment bar; 2421. a first supporting surface; 243. a first connecting piece; 244. a first stop piece; 246. a second guide rail; 260. a first elastic member; 245. a second abutment; 2451. a second fixing portion; 265. a second elastic member; 2366. a first adjustment shaft; 2367. a second adjustment shaft; 247. a second abutment bar; 2471. a second abutting surface; 248. a second connecting piece; 249. a second stop piece; 28. a back cover; 280. a receiving groove; 281. a connecting column; 283. locking the hole.

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 that can be used to practice the present application. Directional terms referred to in this application, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., are merely directions referring to the attached drawings, and thus, directional terms are used for better, more clear description 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 terms in this application will be understood by those of ordinary skill in the art in a specific context.

Referring to fig. 1 to 3, an electronic device 100 according to a first embodiment of the invention includes a foldable housing 20 and a flexible screen 30 disposed on the foldable housing 20. 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. The flexible screen 30 can bend or flatten with the folded housing 20. The folding housing 20 includes two frames 21 and a rotating shaft assembly 22 connected between the two frames 21, wherein two opposite sides of the rotating shaft assembly 22 are respectively connected to the two frames 21, and the two frames 21 are folded or flattened by the rotating shaft assembly 22. The flexible screen 30 includes a bendable region 31 corresponding to the shaft assembly 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 rotating shaft assembly 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 assembly 22, specifically, two non-bending regions 33 of the flexible screen 30 can be fixed on the front sides of the two frames 21 respectively, and the bendable regions 31 are attached to the front sides of the rotating shaft assembly 22. The bendable region 31 of the flexible screen 30 can bend or flatten with the spindle assembly 22.

Referring to fig. 4-9, the rotating shaft assembly 22 includes a base 23, a damping mechanism 24, a rotating mechanism 25 and a supporting mechanism 27, wherein the rotating mechanism 25 is connected between the base 23 and the supporting mechanism 27; the rotation mechanism 25 includes a linkage member 250, a first rotation member 253 and a second rotation member 255, wherein the linkage member 250 is slidably connected to the base 23 and is capable of sliding relative to the base 23 along a first direction parallel to a sliding direction of the linkage member 250 relative to the base 23, and the linkage member 250 includes a first connection portion 2501 and a second connection portion 2502; the first rotating member 253 is disposed on one side of the base 23, and the second rotating member 255 is disposed on the opposite side of the base 23, that is, the first rotating member 253 and the second rotating member 255 are disposed on opposite sides of the base 23; the first rotating member 253 is rotationally connected with the first connecting portion 2501 through the cooperation of the first spiral groove and the first transmission portion, and the second rotating member 255 is rotationally connected with the second connecting portion 2502 through the cooperation of the second spiral groove and the second transmission portion, wherein the rotation directions of the first spiral groove and the second spiral groove are opposite; the damping mechanism 24 abuts against the first rotating member 253, and/or the damping mechanism 24 abuts against the second rotating member 255, when the first rotating member 253 and the second rotating member 255 rotate relative to the damping mechanism 24, frictional resistance between the first rotating member 253 and the damping mechanism 24 and/or frictional resistance between the second rotating member 255 and the damping mechanism 24 are/is limited to rotate the first rotating member 253 and the second rotating member 255 relative to the base 23; such that the first rotator 253 is positioned at any angle between 0 and 90 degrees with respect to the base 23 and the second rotator 255 is positioned at any angle between 0 and 90 degrees with respect to the base 23.

In this embodiment, the damping mechanism 24 abuts against the first rotating member 253 and the second rotating member 255, and the frictional resistance between the first rotating member 253 and the damping mechanism 24 and the frictional resistance between the second rotating member 255 and the damping mechanism 24 together define the rotation of the first rotating member 253 and the second rotating member 255 relative to the base 23.

In some embodiments, the damping mechanism 24 abuts against the first rotating member 253, and the frictional resistance between the first rotating member 253 and the damping mechanism 24 limits the rotation of the first rotating member 253 and the second rotating member 255 relative to the base 23. In some embodiments, the damping mechanism 24 abuts against the second rotating member 255, and the frictional resistance between the second rotating member 255 and the damping mechanism 24 limits the rotation of the first rotating member 253 and the second rotating member 255 relative to the base 23.

The support mechanism 27 includes a first side support 273 and a second side support 275, one side of the first side support 273 is slidably and rotatably connected to the base 23, and the other side opposite to the first side support 273 is rotatably connected to the first rotating member 253; one side of the second side support 275 is slidably and rotatably coupled to the base 23, and the opposite side of the second side support 275 is rotatably coupled to the second rotating member 255; as the link 250 slides in the first direction relative to the base 23, the first and second rotating members 253 and 255 synchronously rotate relative to the base 23 to synchronously move the first and second rotating members 253 and 255 apart or together so that the first and second side supporting members 273 and 275 can be unfolded or folded from each other. Specifically, when the first rotating member 253 rotates relative to the first connection portion 2501, the first transmission portion moves along the first spiral groove such that the linkage member 250 slides relative to the base 23, and at the same time, the sliding of the base 23 moves the second transmission portion along the second spiral groove such that the second rotating member 255 rotates synchronously relative to the second connection portion 2502; when the second rotating member 255 rotates relative to the second connecting portion 2502, the second transmitting portion moves along the second spiral groove such that the linkage member 250 slides relative to the base 23, and at the same time, the sliding of the base 23 moves the first transmitting portion along the first spiral groove such that the first rotating member 253 rotates synchronously relative to the first connecting portion 2501; thereby achieving the synchronous folding or synchronous unfolding of the first rotating member 253 and the second rotating member 255 to drive the first side supporting member 273 and the second side supporting member 275 to be folded or unfolded synchronously, and simultaneously, drive the two frames 21 to be folded or unfolded synchronously, so that the bendable region 31 of the flexible screen 30 is bent or flattened.

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 linkage piece 250 of the rotating shaft assembly 22 is slidingly arranged on the base 23, the first rotating piece 253 is rotationally connected to the first connecting part 2501 through the cooperation of the first transmission part and the first spiral groove, and the second rotating piece 255 is rotationally connected to the second connecting part 2502 through the cooperation of the second transmission part and the second spiral groove; the first and second rotating members 253 and 255 can be synchronously folded or unfolded with respect to the base 23 only by rotating the first transmission portion with respect to the first spiral groove or rotating the second transmission portion with respect to the second spiral groove, thereby synchronously folding or unfolding the first and second side supporting members 273 and 275. Compared with the prior art that the linkage can be realized only through the meshing of the gears, the rotating shaft assembly 22 omits the gears, the gear mounting frame and other elements, so that the elements are reduced, the structure is simplified, the manufacturing cost is reduced, the volume of the rotating shaft assembly 22 is reduced, the internal space of the folding shell 20 occupied by the rotating shaft assembly 22 is reduced, the layout of other elements such as a main board or a battery in the electronic equipment 100 is facilitated, and the miniaturization development is facilitated; in addition, the damping mechanism 24 abuts against the first rotating member 253 and/or the second rotating member 255, and during the simultaneous folding or simultaneous unfolding of the first side supporting member 273 and the second side supporting member 275, frictional resistance between the damping mechanism 24 and the first rotating member 253, and/or frictional resistance between the damping mechanism 24 and the second rotating member 255, such that the first side supporting member 273 and the second side supporting member 275 are positioned with respect to the base 23, respectively, so that the electronic device 100 can achieve hovering; secondly, the rotating mechanism 25 and the base 23 of the rotating shaft assembly 22 are smaller, so that the space occupied by the rotating shaft assembly 22 is reduced, the rotating shaft assembly 22 has a large amount of space for accommodating other components, such as a heat conducting member or a flexible circuit board arranged below the supporting mechanism 27, two opposite ends of the heat conducting member are respectively connected to the two frames 21, heat generated when the components such as a main board and a battery of the electronic device 100 work is conducted to the two frames 21 through the heat conducting member, heat dissipation of the electronic device 100 is facilitated, and two opposite ends of the flexible circuit board are electrically connected to the circuit boards in the two frames 21.

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 rotating shaft assembly 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 rotating shaft assembly 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 assembly 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 surfaces 214 near the frame 21 respectively. Opposite sides of the rotating shaft assembly 22 are respectively accommodated in the mounting grooves 216 of the two frames 21, and one sides of the first rotating member 253 and the second rotating member 255, which are far away from the base 23, are respectively fixedly connected with the corresponding frames 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. 6, a first rotation axis L1 between the first rotation member 253 and the first connection portion 2501 is parallel to the first direction, a second rotation axis L2 between the second rotation member 255 and the second connection portion 2502 is parallel to the first direction, and the first rotation axis L1 and the second rotation axis L2 are parallel to or coincide with each other, and the link 250 slides relative to the base 23 in the first direction. In the embodiment, the first rotation axis L1 and the second rotation axis L2 are parallel to the first direction, and the first rotation axis L1 and the second rotation axis L2 are spaced and parallel. Specifically, the center line O of the linkage 250 is located in the middle between the first rotation axis L1 and the second rotation axis L2, and the center line O is parallel to the first rotation axis L1 and the second rotation axis L2; namely, the first rotation axis L1 and the second rotation axis L2 are symmetrical about the center line O. The center line O, the first rotation axis L1 and the second rotation axis L2 all extend along the X-axis direction in the three-dimensional coordinate system, the center line O, the first rotation axis L1 and the second rotation axis L2 are arranged along the Y-axis direction, the plane where the first rotation axis L1 and the second rotation axis L2 are located is parallel to the XY plane, the linkage 250 slides along the direction parallel to the X-axis, and the track line of the linkage 250 sliding relative to the base 23 is parallel to the plane formed by the first direction and the second direction, that is, the track line of the linkage 250 sliding relative to the base 23 is parallel to the XY plane. It should be noted that: the first direction refers to the X-axis direction in the three-dimensional coordinate system, the second direction refers to the Y-axis direction in the three-dimensional coordinate system, and the third direction refers to the Z-axis direction in the three-dimensional coordinate system; the first direction is perpendicular to the second direction, and the third direction is perpendicular to the first direction and the second direction.

In other embodiments, the first rotational axis L1 between the first rotational member 253 and the first connection portion 2501 and the second rotational axis L2 between the second rotational member 255 and the second connection portion 2502 may also coincide, that is, the connection between the first rotational member 253 and the first connection portion 2501 and the connection between the second rotational member 255 and the second connection portion 2502 may be offset only in the X-axis direction.

As shown in fig. 6 and 12, the first connection portion 2501 and the second connection portion 2502 are offset from each other along a first direction (i.e., an X-axis direction) and/or the first connection portion 2501 and the second connection portion 2502 are offset from each other along a second direction (i.e., a Y-axis direction), the first direction being perpendicular to the second direction. In this embodiment, the first connection portion 2501 and the second connection portion 2502 are respectively located at two sides of the center line O of the linkage 250, the first connection portion 2501 and the second connection portion 2502 on the linkage 250 are arranged in a staggered manner along the first direction (i.e., in the X-axis direction), and the first connection portion 2501 and the second connection portion 2502 are arranged in a staggered manner along the second direction (i.e., in the Y-axis direction), and the first rotation axis L1 and the second rotation axis L2 are spaced in parallel. Since the first and second connection portions 2501 and 2502 are offset in both the X-axis direction and the Y-axis direction, the positions of the first and second connection portions 2501 and 2502 can be made compact, so that the first and second rotation members 253 and 255 respectively connected to the first and second connection portions 2501 and 2502 are offset from each other to be made compact, thereby reducing the space occupied by the rotation shaft assembly 22, and making the rotation shaft assembly 22 have a large amount of space for accommodating other elements.

In other embodiments, the first connection portion 2501 and the second connection portion 2502 on the linkage 250 may be offset along the X-axis direction only, and the first rotation member 253 and the second rotation member 255 are rotatably connected to the first connection portion 2501 and the second connection portion 2502, respectively, and the first rotation axis L1 and the second rotation axis L2 are collinear.

In other embodiments, the first connection portion 2501 and the second connection portion 2502 of the linkage 250 may be offset along the Y-axis direction only, and the first rotating member 253 and the second rotating member 255 are rotatably connected to the first connection portion 2501 and the second connection portion 2502, respectively. Preferably, the first connection portion 2501 and the second connection portion 2502 are symmetrically disposed about the center line O, and the first rotation axis L1 and the second rotation axis L2 are spaced apart in parallel such that the first rotation piece 253 and the second rotation piece 255 respectively connected to the first connection portion 2501 and the second connection portion 2502 are symmetrically disposed about the center line O.

As shown in fig. 10-13, the first spiral groove is provided on one of the first connection portion 2501 and the first rotating member 253, and the first transmission portion is provided on the other of the first connection portion 2501 and the first rotating member 253; the second spiral groove is provided at one of the second connection portion 2502 and the second rotation member 255, and the second transmission portion is provided at the other of the second connection portion 2502 and the second rotation member 255. In this embodiment, the first connection portion 2501 is provided with a first spiral groove 2504, the axis of the first spiral groove 2504 is collinear with the first rotation axis L1, the first rotation member 253 includes a first transmission portion 2531, and the first transmission portion 2531 is slidably accommodated in the first spiral groove 2504; the second connection portion 2502 is provided with a second spiral groove 2505, an axial line of the second spiral groove 2505 is collinear with the second rotation axial line L2, the second rotation member 255 includes a second transmission portion 2551, and the second transmission portion 2551 is slidably accommodated in the second spiral groove 2505. When the first rotating member 253 rotates relative to the base 23, the first transmission portion 2531 slides along the first spiral groove 2504 to push the linkage member 250 to slide along the first direction (i.e., the X-axis direction) relative to the base 23, and meanwhile, the linkage member 250 slides to push the second transmission portion 2551 to slide along the second spiral groove 2505, so that the second rotating member 255 rotates relative to the base 23, and synchronous rotation of the first rotating member 253 and the second rotating member 255 is achieved; when the second rotating member 255 rotates relative to the base 23, the second transmitting portion 2551 slides along the second spiral groove 2505 to push the linkage member 250 to slide in the first direction (i.e., X direction) relative to the base 23, and at the same time, the sliding of the linkage member 250 pushes the first transmitting portion 2531 to slide along the first spiral groove 2504, so that the first rotating member 253 rotates relative to the base 23, thereby achieving synchronous rotation of the first rotating member 253 and the second rotating member 255.

In other embodiments, the first rotating member 253 is provided with a first spiral groove, and the first connecting portion 2501 is provided with a first transmission portion, and the first transmission portion is movably accommodated in the first spiral groove; the second rotating member 255 is provided with a second spiral groove, and the second connecting portion 2502 is provided with a second transmission portion movably received in the second spiral groove.

As shown in fig. 12 and 13, the first connection portion 2501 includes a first circular arc plate 2503, an axis line of the first circular arc plate 2503 is parallel to a first direction (i.e., an X-axis direction), the first spiral groove 2504 is formed in the first circular arc plate 2503, the first transmission portion 2531 is a first spiral rail provided on the first rotating member 253, and the first spiral rail is rotatably accommodated in the first spiral groove 2504; the second connection portion 2502 includes a second circular arc plate 2506, the axis of the second circular arc plate 2506 is parallel to the first direction (i.e., the X-axis direction), the second spiral groove 2505 is formed in the second circular arc plate 2506, and the second transmission portion 2551 is a second spiral rail disposed on the second rotating member 255, and the second spiral rail is slidingly received in the second spiral groove 2505. When the first spiral rail rotates in the first spiral groove 2504, the first spiral rail slidingly pushes against the inner side surface of the first spiral groove 2504 to enable the linkage 250 to slide along the first direction (i.e., the X-axis direction) relative to the base 23, meanwhile, the sliding of the linkage 250 slidingly pushes against the inner surface of the second spiral groove 2505 against the second spiral rail to slide in the second spiral groove 2505, so that the second rotating member 255 rotates relative to the base 23, and synchronous rotation of the first rotating member 253 and the second rotating member 255 is achieved; when the second spiral rail slides in the second spiral groove 2505, the second spiral rail slidably pushes against the inner side surface of the second spiral groove 2505 to enable the linkage 250 to slide in the first direction (i.e., the X-axis direction) relative to the base 23, and at the same time, the sliding of the linkage 250 slidably pushes against the inner surface of the first spiral groove 2504 to rotate in the first spiral groove 2504, so that the second rotating member 255 rotates relative to the base 23, and synchronous rotation of the first rotating member 253 and the second rotating member 255 is achieved.

Further, the first spiral groove 2504 penetrates through the first circular arc plate 2503 along the radial direction of the first circular arc plate 2503 to form two opposite first spiral surfaces 2507 on the first circular arc plate 2503, the first spiral track comprises two opposite first abutting surfaces 2532, and the two first abutting surfaces 2532 are slidably abutted with the two first spiral surfaces 2507; the second spiral groove 2505 penetrates the second circular arc plate 2506 along the radial direction of the second circular arc plate 2506 to form two opposite second spiral surfaces 2508 on the second circular arc plate 2506, the second spiral track comprises two opposite second abutting surfaces 2552, the two second abutting surfaces 2552 and the two second spiral surfaces 2508 are slidably attached to each other, the rotation direction of the first spiral surface 2507 is opposite to that of the second spiral surface 2508, and the first spiral surface 2507 and the second spiral surface 2508 are offset from each other in the X axis direction and the Y axis direction. Specifically, the linkage 250 includes a sliding plate 2511 and guide rails 2515 disposed on opposite sides of the sliding plate 2511, and the first connection portion 2501 and the second connection portion 2502 are disposed on the sliding plate 2511 respectively, and the guide rails 2515 extend along a first direction (i.e., the X-axis direction). In this embodiment, the sliding plate 2511 is a rectangular plate, the length direction of the sliding plate 2511 extends in the X-axis direction, the width direction of the sliding plate 2511 extends in the Y-axis direction, and the thickness direction of the sliding plate 2511 extends in the Z-axis direction; the first connection portion 2501 and the second connection portion 2502 are located at two opposite corners of the sliding plate 2511, respectively. Specifically, two opposite corners of the front surface of the sliding plate 2511 are respectively provided with a first avoidance slot 2512 and a second avoidance slot 2513; the first keep away from the position groove 2512 and pass through the back of the sliding plate 2511 and one side of the first keep away from the position groove 2512 and pass through the side of the sliding plate 2511 facing away from the second keep away from the position groove 2513, the second keep away from the position groove 2513 and pass through the back of the sliding plate 2511 and one side of the second keep away from the position groove 2513 and pass through the side of the sliding plate 2511 facing away from the first keep away from the position groove 2512. The first arc plate 2503 is accommodated in the first space avoiding groove 2512, and the opposite ends of the first arc plate 2503 along the axial direction thereof are respectively connected to the sliding plate 2511; the second arc plate 2506 is accommodated in the second escape slot 2513, and the second arc plate 2506 is connected to the sliding plate 2511 at opposite ends thereof in the axial direction, respectively. The first arc plate 2503 includes a first inner arc surface 2503a and a first outer arc surface 2503b, the axes of the first inner arc surface 2503a and the first outer arc surface 2503b are collinear, the front faces of the first inner arc surface 2503a and the sliding plate 2511 are the same, and the back faces of the first outer arc surface 2503b and the sliding plate 2511 are the same; preferably, the first spiral groove 2504 is located at a middle portion of the first circular arc plate 2503, and the first spiral groove 2504 penetrates the first inner arc surface 2503a and the first outer arc surface 2503b along a radial direction of the first circular arc plate 2503, that is, the first spiral groove 2504 penetrates the first circular arc plate 2503 to communicate with the first avoidance groove 2512. The second arc plate 2506 includes a second inner arc surface 2506a and a second outer arc surface 2506b, the axes of the second inner arc surface 2506a and the second outer arc surface 2506b are collinear, the second inner arc surface 2506a faces the same front face of the sliding plate 2511, and the second outer arc surface 2506b faces the same back face of the sliding plate 2511; preferably, the second spiral groove 2505 is located at a middle portion of the second circular arc plate 2506, and the second spiral groove 2505 penetrates the second inner arc surface 2506a and the second outer arc surface 2506b along a radial direction of the second circular arc plate 2506, that is, the second spiral groove 2505 penetrates the second circular arc plate 2506 to communicate with the second avoidance groove 2513. Two guide rails 2515 are disposed on two opposite sides of the back surface of the sliding plate 2511, the same ends of the two guide rails 2515 are respectively provided with a sliding groove 2516, the sliding grooves 2516 extend along a first direction (i.e. the X-axis direction), and one ends of the two guide rails 2515, which deviate from the sliding grooves 2516, extend out of the sliding plate 2511 along the X-axis direction.

In other embodiments, the first spiral groove 2504 of the first connection portion 2501 and the second spiral groove 2505 of the second connection portion 2502 are offset from each other only in the first direction (i.e., X-axis direction), i.e., the first spiral groove 2504 and the second spiral groove 2505 are offset from each other in a direction parallel to the center line O. When the first and second transmission portions 2531 and 2551 are respectively accommodated in the first and second spiral grooves 2504 and 2505, the first and second transmission portions 2531 and 2551 are offset from each other in a direction parallel to the center line O.

In other embodiments, the first spiral groove 2504 of the first connection portion 2501 and the second spiral groove 2505 of the second connection portion 2502 are offset from each other only in the second direction (i.e., Y-axis direction), i.e., the first spiral groove 2504 and the second spiral groove 2505 are offset from each other in a direction perpendicular to the center line O, i.e., the first spiral groove 2504 and the second spiral groove 2505 are located on opposite sides of the center line O. When the first and second transmission portions 2531 and 2551 are respectively accommodated in the first and second spiral grooves 2504 and 2505, the first and second transmission portions 2531 and 2551 are offset from each other in the Y-axis direction.

The length of the first and second spiral grooves 2504 and 2505 extending spirally in a direction parallel to the sliding direction of the linkage member 250 is proportional to the length of the sliding of the linkage member 250 with respect to the base 23. That is, the longer the first and second spiral grooves 2504 and 2505 spirally extend in a direction parallel to the center line O, the longer the linkage 250 slides with respect to the base 23; the shorter the first and second spiral grooves 2504 and 2505 spirally extend in the direction parallel to the center line O, the shorter the length of the link 250 sliding with respect to the base 23. Specifically, the rotation direction of the first spiral 2507 is opposite to that of the second spiral 2508, the angle between the first spiral 2507 and the first rotation axis L1 is equal to that between the second spiral 2508 and the second rotation axis L2, and the length of the first spiral 2507 extending in the direction along the first rotation axis L1 (i.e., the X-axis direction) is equal to that of the second spiral 2508 extending in the direction along the second rotation axis L2 (i.e., the X-axis direction); the longer the first and second helicoids 2507, 2508 extend in a direction parallel to the centerline O (i.e., X-axis direction), the longer the linkage 250 slides relative to the base 23; the shorter the first helicoidal surface 2507 and the second helicoidal surface 2508 extend in a direction parallel to the center line O (i.e., the X-axis direction), the shorter the length that the linkage 250 slides relative to the base 23.

As shown in fig. 4-13, the first rotating member 253 further includes a first connecting portion 2533 and a first supporting portion 2534 connected between the first connecting portion 2533 and the first transmission portion 2531, the first connecting portion 2533 is used for connecting to the frame 21 and the first side supporting member 273, one end of the first supporting portion 2534 is connected to the middle portion of the first connecting portion 2533, and the other end of the first supporting portion 2534 is connected to one end of the first transmission portion 2531. The first side support 273 and the first rotating member 253 are rotatably connected by a first circular arc groove provided in one of the first side support 273 and the first rotating member 253, and a first circular arc rail provided in the other of the first side support 273 and the first rotating member 253, the axis of the first circular arc groove being parallel to the first rotation axis L1. In this embodiment, the end of the first rotating member 253, which is far away from the first transmission portion 2531, is provided with a first circular arc groove 2535, and the side of the first side supporting member 273, which is far away from the base 23, is provided with a first circular arc rail 2731, and the first circular arc rail 2731 is rotatably accommodated in the first circular arc groove 2535. Specifically, the first circular arc groove 2535 is disposed on one end surface of the first connection portion 2533; preferably, the first connection portion 2533 is a rectangular rod, the first support portion 2534 is connected to a middle portion of one side of the rectangular rod, and the first circular arc groove 2535 is formed in an end face of the rectangular rod.

The second side support 275 is rotatably connected to the second rotating member 255 by a second arcuate groove provided in one of the second side support 275 and the second rotating member 255, and a second arcuate rail provided in the other of the second side support 275 and the second rotating member 255. Specifically, the second rotating member 255 further includes a second connecting portion 2553 and a second supporting portion 2554 connected between the second connecting portion 2553 and the second transmission portion 2551, the second connecting portion 2553 is configured to be connected to the frame 21 and the second side supporting member 275, one end of the second supporting portion 2554 is connected to one end of the second connecting portion 2553, and the other end of the second supporting portion 2554 is connected to one end of the second transmission portion 2551. The second side support 275 is rotatably connected to the second rotating member 255 by a second arcuate groove provided in one of the second side support 275 and the second rotating member 255, and a second arcuate rail provided in the other of the second side support 275 and the second rotating member 255, the axis of the second arcuate groove being parallel to the second rotation axis L2. In this embodiment, a second circular arc groove 2555 is disposed at an end of the second rotating member 255 away from the second transmission portion 2551, a second circular arc rail 2751 is disposed at a side of the second side supporting member 275 away from the base 23, and the second circular arc rail 2751 is rotatably accommodated in the second circular arc groove 2555. Specifically, the second circular arc groove 2555 is disposed on one end surface of the second connection portion 2553; preferably, the second connection portion 2553 is a rectangular rod, the second support portion 2554 is connected to one end of the rectangular rod, and the first circular arc groove 2535 is provided on the other end surface of the rectangular rod.

In other embodiments, a first circular arc rail is disposed at an end of the first rotating member 253 away from the first transmission portion 2531, and first circular arc grooves are respectively disposed at sides of the first side supporting members 273 away from the base 23, and the first circular arc rail is rotatably accommodated in the first circular arc grooves; one end of the second rotating member 255, which is far away from the second transmission portion 2551, is provided with a second circular arc rail, and one side of the second side supporting member 275, which is far away from the base 23, is respectively provided with a second circular arc groove, wherein the second circular arc rail is rotatably accommodated in the second circular arc groove. Specifically, the end of the first connecting portion 2533 away from the first transmission portion 2531 is provided with a first circular arc rail, and the sides of the first side supporting members 273 away from the base 23 are respectively provided with first circular arc grooves; the end of the second connecting portion 2553, which is far away from the second transmission portion 2551, is provided with a second circular arc rail, and one side of the second side supporting piece 275, which is far away from the base 23, is provided with a second circular arc groove.

The first rotating member 253 further includes a first rotating plate 2536, the first transmission portion 2531 is connected to the first rotating plate 2536, and the first rotating plate 2536 is rotatably connected to the first circular arc plate 2503; specifically, the first rotating plate 2536 is an arc-shaped plate, the first rotating plate 2536 includes a first rotating surface 2537 with a circular arc shape, the first spiral track is disposed on the first rotating surface 2537, and the first rotating surface 2537 is used for rotationally fitting to the first outer arc surface 2503b. The first rotating plate 2536 includes a first limiting portion 2536a, a second limiting portion 2536b, and a first damping portion 2536c located between the first limiting portion 2536a and the second limiting portion 2536b, and specifically, the first rotating plate 2536 includes two opposite first sides, each first side is parallel to the YZ plane, and the first limiting portion 2536a, the second limiting portion 2536b, and the first damping portion 2536c are located on a first side of the first rotating plate 2536 facing away from the first circular arc groove 2535; the first limiting portion 2536a is closer to the first connecting portion 2533 than the second limiting portion 2536 b. The second rotating member 255 further includes a second rotating plate 2556, the second transmission portion 2551 is connected to the second rotating plate 2556, and the second rotating plate 2556 is rotatably connected to the second circular arc plate 2506; specifically, the second rotating plate 2556 is an arc-shaped plate, the second rotating plate 2556 includes a circular arc-shaped second rotating surface 2557, the second spiral track is disposed on the second rotating surface 2557, and the second rotating surface 2557 is used for rotationally fitting to the second outer circular arc surface 2506b. The second rotating plate 2556 includes a third limiting portion 2556a, a fourth limiting portion 2556b, and a second damping portion 2556c located between the third limiting portion 2556a and the fourth limiting portion 2556 b; specifically, the second rotating plate 2556 includes two opposite second sides, each of which is parallel to the YZ plane; the third limiting portion 2556a, the fourth limiting portion 2556b and the second damping portion 2556c are located on the second side surface of the second rotating plate 2556 facing the second circular arc groove 2555; the third limiting portion 2556a is closer to the second connecting portion 2553 than the fourth limiting portion 2556 b.

In some embodiments, the first limiting portion 2536a, the second limiting portion 2536b and the first damping portion 2536c on the first rotating member 253 may be omitted, and the third limiting portion 2556a, the fourth limiting portion 2556b and the second damping portion 2556c are only disposed on the second rotating plate 2556 of the second rotating member 255.

In some embodiments, the third limiting portion 2556a, the fourth limiting portion 2556b and the second damping portion 2556c on the second rotating member 255 may be omitted, and only the first limiting portion 2536a, the second limiting portion 2536b and the first damping portion 2536c are disposed on the first rotating plate 2536 of the first rotating member 253.

The first rotating member 253 further includes a first stop plate 2538, the first stop plate 2538 is connected to a side of the first transmission portion 2531 facing away from the first rotating plate 2536, opposite sides of the first stop plate 2538 extend out of opposite sides of the first transmission portion 2531, so as to form first rotating grooves 2538a on opposite sides of the first transmission portion 2531, and the first rotating grooves 2538a are used for accommodating the first arc plates 2503; that is, the first stop plate 2538 is connected to a side of the first spiral rail facing away from the first rotating plate 2536, opposite sides of the first stop plate 2538 extend respectively to opposite sides of the first spiral rail, and when the first spiral rail is accommodated in the first spiral groove 2504, the first arc plate 2503 is disposed between the first rotating plate 2536 and the first stop plate 2538 to prevent the first spiral rail from being separated from the first spiral groove 2504. Preferably, the side of the first stop plate 2538 facing the first rotation plate 2536 is an arc surface, and the arc surface is coaxial with the first rotation surface 2537. The second rotating member 255 further includes a second stop plate 2558, the second stop plate 2558 is connected to a side of the second transmission portion 2551 facing away from the second rotating plate 2556, opposite sides of the second stop plate 2558 extend out of opposite sides of the second transmission portion 2551, so as to form second rotating grooves 2558a on opposite sides of the second transmission portion 2551, and the second rotating grooves 2558a are used for accommodating the second arc plates 2506; that is, the second stop plate 2558 is connected to a side of the second spiral rail facing away from the second rotating plate 2556, opposite sides of the second stop plate 2558 extend respectively to opposite sides of the second spiral rail, and when the second spiral rail is accommodated in the second spiral groove 2505, the second arc plate 2506 is disposed between the second rotating plate 2556 and the second stop plate 2558 to prevent the second spiral rail from being separated from the second spiral groove 2505. Preferably, the side of the second stop plate 2558 facing the second rotating plate 2556 is an arc surface, and the arc surface is coaxial with the second rotating surface 2557.

Referring to fig. 8-11, fig. 14 and fig. 15 together, the damping mechanism 24 includes a first abutting member 240 and a first elastic member 260, wherein the first abutting member 240 is slidably disposed on the base 23 along a first direction (i.e. an X-axis direction), i.e. a track line of the first abutting member 240 sliding relative to the base 23 is parallel to a plane (i.e. an XY plane) formed by the first direction and the second direction; the first elastic member 260 provides a pre-elastic force for driving the first propping member 240 to prop against the first transmission portion 2531; and/or, the damping mechanism 24 further includes a second abutting member 245 and a second elastic member 265, where the second abutting member 245 is slidably disposed on the base 23 along the first direction (i.e. the X-axis direction), i.e. a track line of the second abutting member 245 sliding relative to the base 23 is parallel to a plane (i.e. the XY-plane) formed by the first direction and the second direction, and the second elastic member 265 provides a pre-elastic force for driving the second abutting member 245 to abut against the second transmission portion 2551. In the present embodiment, the damping mechanism 24 includes a first propping member 240, a first elastic member 260, a second propping member 245 and a second elastic member 265, wherein the first elastic member 260 can prop against the first rotating plate 2536 of the first rotating member 253 to limit the first rotating member 253 to rotate relative to the base 23 by pushing the first propping member 240 to slidably prop against the base 23 along the X-axis direction; and the second elastic member 265 can push the second pushing member 245 to slidably push the second rotating plate 2556 of the second rotating member 255 on the base 23 along the X-axis direction, so as to limit the second rotating member 255 to rotate relative to the base 23. In some embodiments, the second propping element 245 and the second elastic element 265 may be omitted, and only the first elastic element 260 is used to prop against the first rotating plate 2536 of the first rotating element 253 along the X-axis direction by pushing against the first propping element 240, so as to limit the first rotating element 253 and the second rotating element 255 to rotate relative to the base 23. In some embodiments, the first propping element 240 and the first elastic element 260 may be omitted, and only the second elastic element 265 is used to prop against the second rotating plate 2556 of the second rotating element 255 along the X-axis direction, so as to limit the rotation of the second rotating element 255 and the first rotating element 253 relative to the base 23.

The first propping piece 240 is slidably connected with the base 23 through the cooperation of a first guide groove and a first guide rail, the first guide groove is arranged on one of the first propping piece 240 and the base 23, and the first guide rail is arranged on the other of the first propping piece 240 and the base 23; the second propping piece 245 is slidably connected with the base 23 through the cooperation of a second guide groove, the second guide groove is arranged on one of the second propping piece 245 and the base 23, the second guide groove is arranged on the other of the second propping piece 245 and the base 23, and the first guide groove and the second guide groove extend along the first direction (namely the X-axis direction). In this embodiment, the front surface of the base 23 is provided with a first guide groove 231 and a second guide groove 232 spaced in parallel, the length of the first guide groove 231 extends along the X-axis direction, the first guide groove 231 and the second guide groove 232 are located at two opposite sides of the center line O, the first guide groove 231 and the second guide groove 232 are offset from each other in the X-axis direction, the first abutting member 240 includes a first guide rail 241 slidingly received in the first guide groove 231 along the X-axis direction, and the second abutting member 245 includes a second guide rail 246 slidingly received in the second guide groove 232 along the X-axis direction. Specifically, the base 23 includes a front surface 230 parallel to the XY plane, the front surface 230 is provided with a first receiving groove 2310 and a second receiving groove 2320 on opposite sides of a center line O, the first receiving groove 2310 and the second receiving groove 2320 are offset from each other in the X-axis direction, and the first elastic member 260 and the second elastic member 265 are respectively accommodated in the first receiving groove 2310 and the second receiving groove 2320. The base 23 has a first guide groove 231 on an inner wall of the first receiving groove 2310, and a second guide groove 232 on an inner wall of the second receiving groove 2320. The base 23 is provided with a first positioning portion 2312 at an end wall of the first receiving groove 2310 away from the first guide groove 231, and the first positioning portion 2312 is used for positioning the first elastic member 260; the base 23 is provided with a second positioning portion 2322 at an end wall of the second accommodating groove 2320 away from the second guiding groove 232, and the second positioning portion 2322 is used for positioning the second elastic element 265. The front surface 230 of the base 23 is provided with a first connection groove 2313 and a second connection groove 2323, the first connection groove 2313 extends along the X-axis direction, one end of the first connection groove 2310 is communicated with the first receiving groove 2310, and the second connection groove 2323 extends along the X-axis direction, one end of the second connection groove 2320 is communicated with the second receiving groove 2320. The base 23 is provided with a first receiving hole 2314 and a first stop groove 2315 spaced apart from each other on a bottom surface of the first connecting groove 2313, and the first receiving hole 2314 is closer to the first positioning portion 2312 than the first stop groove 2315; the base 23 is provided with a second receiving hole 2324 and a second stop groove 2325 spaced apart from each other on a bottom surface of the second connecting groove 2323, and the second receiving hole 2324 is closer to the second positioning portion 2322 than the second stop groove 2325.

The first abutment 240 includes a first abutment bar 242 slidably received in the first connection groove 2313, a first connection plate 243 connected to one end of the first abutment bar 242, a first stop plate 244 connected to the opposite end of the first abutment bar 242, and a first fixing portion 2401 connected to the first connection plate 243. The first supporting bar 242 has a first supporting surface 2421 at an end facing away from the first connecting piece 243, and the first supporting surface 2421 is configured to slidably support the first limiting portion 2536a, the second limiting portion 2536b, and the first damping portion 2536c of the first rotating member 253. One end of the first abutting strip 242 is connected to the middle of the first connecting piece 243, and the first guide rail 241 is protruding on the side surface of the first connecting piece 243. The first stop piece 244 is arranged at one end of the first abutting strip 242 far away from the first connecting piece 243, and the first stop piece 244 and the first guide rail 241 are positioned on the same side of the first abutting strip 242; preferably, the first stop tab 244 is an inverted T-shaped tab. The first fixing portion 2401 is protruding on a side of the first connecting piece 243 away from the first abutment bar 242, and the first fixing portion 2401 is used for positioning the first elastic member 260. The second abutment 245 includes a second abutment bar 247 slidably received in the second connection slot 2323, a second connection tab 248 connected to one end of the second abutment bar 247, a second stop tab 249 connected to the opposite end of the second abutment bar 247, and a second fixing portion 2451 connected to the second connection tab 248. The second abutting strip 247 is provided with a second abutting surface 2471 at one end facing away from the second connecting piece 248, and the second abutting surface 2471 is used for slidably abutting against the third limiting portion 2556a, the fourth limiting portion 2556b and the second damping portion 2556c of the second rotating piece 255. One end of the second abutting strip 247 is connected to the middle of the second connecting piece 248, and the second guide rail 246 is protruding on the side surface of the second connecting piece 248. The second stop sheet 249 is disposed at one end of the second abutting strip 247 away from the second connecting sheet 248, and the second stop sheet 249 and the second guide rail 246 are disposed on the same side of the second abutting strip 247; preferably, the second stop tab 249 is an inverted T-shaped tab. The second fixing portion 2451 is protruding on a side of the second connecting piece 248 away from the second abutting strip 247, and the second fixing portion 2451 is used for positioning the second elastic element 265.

As shown in fig. 8 to 11, the first rotating member 253 is rotatably connected to the base 23 through the circular arc-shaped first limiting groove 237 and the first rotating plate 2536, so as to limit the movement of the first rotating member 253 in the first direction (i.e., the X-axis direction), that is, the first rotating member 253 cannot move in the first rotation axis L1 direction. The second rotating member 255 is rotatably connected to the base 23 through the circular arc-shaped second limiting groove 238 and the second rotating plate 2556, so as to limit the movement of the second rotating member 255 in the first direction (i.e., the X-axis direction), that is, the second rotating member 255 cannot move in the second rotation axis L2 direction. The axis of the first limiting groove 237 is collinear with the first rotational axis L1, and the axis of the second limiting groove 238 is collinear with the second rotational axis L2. In this embodiment, the front surface 230 of the base 23 is provided with a first limiting groove 237 and a second limiting groove 238 on two opposite sides of the center line O, and the first limiting groove 237 and the second limiting groove 238 are offset from each other along the X-axis direction, specifically, the first limiting groove 237 is located at one end of the first connecting groove 2313, the first connecting groove 2313 is communicated with the first limiting groove 237, and the first limiting groove 237 and the second accommodating groove 2320 are arranged at intervals along the Y-axis direction; the second limiting groove 238 is located at one end of the second connecting groove 2323, the second connecting groove 2323 is communicated with the second limiting groove 238, and the second limiting groove 238 and the first accommodating groove 2310 are arranged at intervals in the Y-axis direction. The base 23 is provided with first limiting surfaces 2371 at opposite ends of the first limiting groove 237, opposite first side surfaces of the first rotating plate 2536 are respectively in sliding contact with the two first limiting surfaces 2371, and the first limiting portion 2536a, the second limiting portion 2536b and the first damping portion 2536c correspond to the first connecting groove 2313; the base 23 is provided with second limiting surfaces 2381 at two opposite ends of the second limiting groove 238, two opposite second side surfaces of the second rotating plate 2556 are respectively slidably abutted against the two second limiting surfaces 2381, and the third limiting portion 2556a, the fourth limiting portion 2556b and the second damping portion 2556c correspond to the second connecting groove 2323. The opposite ends of the front surface 230 of the base 23 are respectively provided with connecting holes 2308.

In some embodiments, the first receiving groove 2310 and the second receiving groove 2320 are located at opposite sides of one end of the front surface 230, that is, the first receiving groove 2310 and the second receiving groove 2320 are spaced apart from each other along the Y-axis direction; the first limit groove 237 and the second limit groove 238 are positioned at two opposite sides of the opposite end of the front face 230, i.e. the first limit groove 237 and the second limit groove 238 are spaced from each other along the Y-axis direction; opposite ends of the first connection slot 2313 are respectively communicated with the first accommodating slot 2310 and the first limiting slot 237, and opposite ends of the second connection slot 2323 are respectively communicated with the second accommodating slot 2320 and the second limiting slot 238.

In some examples, the inner peripheral surface of the first limiting groove 237 of the base 23 and the outer peripheral surface of the first rotating plate 2536 are rotatably connected by the cooperation of a circular arc-shaped first limiting groove, the axial line of which is collinear with the first rotating axis L1, the first limiting groove is formed in one of the base 23 and the first rotating plate 2536, the first protrusion is formed in the other of the base 23 and the first rotating plate 2536, and the first protrusion is slidably accommodated in the first limiting groove; the inner peripheral surface of the second limiting groove 238 of the base 23 is rotatably connected with the outer peripheral surface of the second rotating plate 2556 through the cooperation of the circular arc-shaped second limiting groove, the axial line of the second limiting groove is collinear with the second rotating axial line L2, the second limiting groove is arranged on one of the base 23 and the second rotating plate 2556, the second protrusion is arranged on the other of the base 23 and the second rotating plate 2556, and the second protrusion is slidably accommodated in the second limiting groove. Preferably, the first protrusion and the second protrusion may be, but are not limited to, a cylinder, a sphere, a rectangular column, etc.

As shown in fig. 6-11 and 14-15, the linkage 250 is slidably connected to the base 23 through a sliding guide groove provided on one of the linkage 250 and the base 23 and extending in a first direction (i.e., X-axis direction), and a sliding guide rail provided on the other of the linkage 250 and the base 23. In this embodiment, the linkage 250 is provided with a guide rail 2515, the base 23 is provided with a guide chute 234 corresponding to the guide rail 2515, and the guide rail 2515 is slidingly accommodated in the guide chute 234. Specifically, the opposite sides of the base 23 are respectively provided with a guide chute 234. Preferably, two opposite sides of one end of the back surface of the base 23 are respectively provided with a notch 2303 to form a sliding guide portion 2306, and the sliding guide portion 2306 is configured to be slidably inserted into the sliding slot 2516 of the linkage 250. In other embodiments, the base 23 is provided with guide rails on opposite sides, the linkage 250 is provided with guide grooves on opposite sides, each guide groove extends along the X-axis direction, and two guide rails are slidably inserted into the two guide grooves.

In other embodiments, the linkage member 250 is provided with a guiding chute along the X-axis direction, and the base 23 is provided with a guiding rail corresponding to the guiding chute, and the guiding rail is slidably accommodated in the guiding chute.

As shown in fig. 6 to 11, the first side supporting member 273 is connected to the base 23 by a first adjustment groove provided in one of the first side supporting member 273 and the base 23 and a first adjustment shaft provided in the other of the first side supporting member 273 and the base 23, the first adjustment shaft being parallel to the X-axis direction; the second side support 275 is connected with the base 23 through a second adjusting groove, the second adjusting shaft is parallel to the X-axis direction, the second adjusting groove is arranged on one of the second side support 275 and the base 23, and the second adjusting shaft is arranged on the other of the second side support 275 and the base 23. In this example, a first adjusting groove 2733 is formed on a side of the first side supporting member 273 near the base 23, and a first adjusting shaft 2366 is formed on a side of the base 23 corresponding to the first side supporting member 273; the second side support 275 is provided with a second adjusting groove 2753 near the side of the base 23, and the side of the base 23 corresponding to the second side support 275 is provided with a second adjusting shaft 2367. When the first and second side supports 273 and 275 are synchronously folded or unfolded with respect to the base 23, the first adjustment shaft 2366 slides and rotates in the first adjustment groove 2733, and the second adjustment shaft 2367 slides and rotates in the second adjustment groove 2753. Specifically, a connecting block 236 is disposed at one end of the front surface of the base 23, and a first adjusting shaft 2366 and a second adjusting shaft 2367 are disposed on the connecting block 236; the connection block 236 and the front face 230 of the base 23 enclose a receiving space 2307 for receiving the linkage 250. The front surface of the connecting block 236 is provided with a clearance groove 2361, two opposite ends of the front surface of the connecting block 236, which are opposite to the clearance groove 2361, are respectively provided with a pair of first lugs 2363 and a pair of second lugs 2364, the pair of first lugs 2363 are mutually spaced at two opposite sides of the clearance groove 2361, and the pair of second lugs 2364 are mutually spaced at two opposite sides of the clearance groove 2361; the first adjusting shaft 2366 is located between the pair of first lugs 2363, and opposite ends of the first adjusting shaft 2366 are respectively rotatably connected to ends of the pair of first lugs 2363 away from the front surface of the connecting block 236; the second adjusting shaft 2367 is located between the pair of second lugs 2364, and opposite ends of the second adjusting shaft 2367 are respectively rotatably connected to ends of the pair of second lugs 2364 away from the front surface of the connecting block 236. The first side supporting member 273 includes a first side supporting plate 2730 and a first adjusting arm 2734 disposed on a side of the first side supporting plate 2730 near the base 23, the first adjusting arm 2734 extends from the first side supporting plate 2730 to a side of the base 23, the first circular arc rail 2731 is disposed on a side of the back surface of the first side supporting plate 2730 away from the first adjusting arm 2734, the first adjusting slot 2733 is disposed on the first adjusting arm 2734, and the first adjusting shaft 2366 is rotatably and slidably accommodated in the first adjusting slot 2733 on the corresponding first adjusting arm 2734. The second side support 275 includes a second side support plate 2750 and a second adjusting arm 2754 disposed on a side of the second side support plate 2750 near the base 23, the second adjusting arm 2754 extends from the second side support plate 2750 to a side of the base 23, the second circular arc rail 2751 is disposed on a side of the back surface of the second side support plate 2750 away from the second adjusting arm 2754, the second adjusting slot 2753 is disposed on the second adjusting arm 2754, and the second adjusting shaft 2367 is rotatably and slidably accommodated in the second adjusting slot 2753 on the corresponding second adjusting arm 2754.

Preferably, the first adjusting arm 2734 is an arc-shaped bar whose middle portion is closer to the base 23 than opposite ends, i.e., the middle portion of the first adjusting arm 2734 is bent toward one side of the base 23, and the first adjusting groove 2733 extends along the first adjusting arm 2734 from near one end of the first adjusting arm 2734 to near the opposite end, i.e., the middle portion of the first adjusting groove 2733 is bent toward one side near the base 23. The first adjusting groove 2733 includes a first positioning segment 2733a and a second positioning segment 2733b at opposite ends thereof, and the first positioning segment 2733a is closer to the first circular arc rail 2731 than the second positioning segment 2733 b. The second adjusting arm 2754 is an arc-shaped bar whose middle portion is closer to the base 23 than opposite ends, i.e., the middle portion of the second adjusting arm 2754 is bent toward one side of the base 23, and the second adjusting groove 2753 extends along the second adjusting arm 2754 from near one end of the second adjusting arm 2754 to near the opposite end, i.e., the middle portion of the second adjusting groove 2753 is bent toward one side near the base 23. The second adjusting groove 2753 includes a third positioning segment 2753a and a fourth positioning segment 2753b at opposite ends thereof, and the third positioning segment 2753a is closer to the second circular arc rail 2751 than the fourth positioning segment 2753 b. When the first and second side supporters 273 and 275 are in the completely flattened state, the first adjusting shaft 2366 is positioned at the first positioning section 2733a, and the second adjusting shaft 2367 is positioned at the third positioning section 2753a such that the front surface of the first side supporter 273 is coplanar with the front surface of the second side supporter 275, so that the first and second side supporters 273 and 275 can stably support the flexible screen to prevent the flexible screen from being damaged by sagging. When the first side supporting member 273 and the second side supporting member 275 are in the fully folded state, the first adjusting shaft 2366 is positioned at the second positioning section 2733b, and the second adjusting shaft 2367 is positioned at the fourth positioning section 2753b, so that the front surface of the first side supporting member 273 and the front surface of the second side supporting member 275 enclose a water drop-shaped accommodating space, so as to facilitate accommodating the bendable region of the flexible screen. Further, the end surface of the first adjusting arm 2734 away from the first circular arc rail 2731 is an arc surface, and the end surface of the second adjusting arm 2753 away from the second circular arc rail 2751 is an arc surface, so as to facilitate folding or unfolding of the first side supporting member 273 and the second side supporting member 275. A first avoidance opening 2736 is formed in one side, close to the base 23, of the first side support plate 2730, and the first avoidance opening 2736 is used for avoiding the first rotating piece 253; the second side support plate 2750 is provided with a second avoidance opening 2756 at a side close to the base 23, the second avoidance opening 2756 is used for avoiding the second rotating member 255, and when the first rotating member 253 and the second rotating member 255 rotate relative to the base 23, the first support portion 2534 of the first rotating member 253 and the second support portion 2554 of the second rotating member 255 are respectively accommodated in the first avoidance opening 2736 and the second avoidance opening 2756.

The first elastic member 260 is accommodated in the first accommodating groove 2310, the first elastic member 260 is elastically propped between the base 23 and the first propping member 240, and the first elastic member 260 is used for biasing the first propping member 240 towards the first rotating member 253; the second elastic member 265 is accommodated in the second accommodating groove 2320, the second elastic member 265 is elastically propped between the base 23 and the second propping member 245, and the second elastic member 265 is used for biasing the second propping member 245 towards the second rotating member 255. The first elastic member 260 and the second elastic member 265 may be, but not limited to, springs, elastic rubber, spring plastic, etc. In this embodiment, the first elastic member 260 is a spring, and opposite ends of the spring respectively abut against the first abutting member 240 and the base 23, and the first elastic member 260 has a pre-elastic force for biasing the first abutting member 240 to move toward the first rotating member 253; the second elastic member 265 is a spring, and opposite ends of the spring respectively abut against the second abutting member 245 and the base 23, and the second elastic member 265 has a pre-elastic force for biasing the second abutting member 245 to move toward the second rotating member 255.

As shown in fig. 4-11, the spindle assembly 22 further includes a back cover 28, and the back of the base 23 is accommodated in the back cover 28. Specifically, the back cover 28 is a bar frame, the back cover 28 has a receiving groove 280, and the base 23 is received in the receiving groove 280 and fixedly connected to the back cover 28. In this embodiment, the inner surface of the receiving groove 280 of the back cover 28 is provided with a connecting post 281, the connecting post 281 is provided with a locking hole 283 along the axial direction, and the locking member is locked in the corresponding locking hole 283 through the connecting hole 2308 of the base 23, so that the base 23 is fixedly connected to the back cover 28. In other embodiments, the back cover 28 is provided with a glue layer on the inner surface of the receiving groove 280, and the base 23 is connected to the back cover 28 through the glue layer. In other embodiments, the back cover 28 may also be clamped to the back cover 28.

Referring to fig. 4-25, when the rotating shaft assembly 22 is assembled, the first transmission portion 2531 and the second transmission portion 2551 are respectively accommodated in the first spiral groove 2504 and the second spiral groove 2505, so that two first pushing surfaces 2532 of the first transmission portion 2531 are respectively slidably attached to two first spiral surfaces 2507, and two second pushing surfaces 2552 of the second transmission portion 2551 are respectively slidably attached to two second spiral surfaces 2508; the first rotating plate 2536 and the second rotating plate 2556 are respectively accommodated in the first avoidance slot 2512 and the second avoidance slot 2513, so that the first rotating surface 2537 of the first rotating plate 2536 is slidably attached to the first outer arc surface 2503b of the first arc plate 2503, and the second rotating surface 2537 of the second rotating plate 2556 is slidably attached to the second outer arc surface 2506b of the second arc plate 2506, so that the first rotating member 253 and the second rotating member 255 are respectively rotatably connected to two opposite sides of the linkage member 250. The first stop piece 244, the first guide rail 241, the first connecting piece 243, and the first abutting strip 242 of the first abutting piece 240 are respectively accommodated in the first stop groove 2315, the first guide groove 231, the first accommodating hole 2314, and the first connecting groove 2313 of the base 23; the second stop sheet 249, the second guide rail 246, the second connecting piece 248, and the second abutting strip 247 of the second abutting piece 245 are respectively accommodated in the second stop slot 2325, the second guide slot 232, the second accommodating hole 2324, and the second connecting slot 2323 of the base 23; the first elastic member 260 is accommodated in the first accommodating groove 2310 of the base 23, such that opposite ends of the first elastic member 260 are respectively positioned at the first positioning portion 2312 and the first fixing portion 2401, and the first elastic member 260 elastically pushes the first pushing member 240 to slide the first pushing strip 242 in the first connecting groove 2313 until the first pushing surface 2421 extends into the first limiting groove 237; the second elastic member 265 is respectively accommodated in the second accommodating groove 2320 of the base 23, so that opposite ends of the second elastic member 265 are respectively positioned at the second positioning portion 2322 and the second fixing portion 2451, and the second elastic member 265 elastically pushes the second pushing member 245 to enable the second pushing strip 247 to slide in the second connecting groove 2323 until the second pushing surface 2471 extends into the second limiting groove 238; the linkage piece 250 of the rotating mechanism 25 is placed in the accommodating space 2307 of the base 23, the first rotating plate 2536 and the second rotating plate 2556 are respectively accommodated in the first limiting groove 237 and the second limiting groove 238, so that two guide sliding rails 2515 of the linkage piece 250 are respectively accommodated in two guide sliding grooves 234 of the base 23 in a sliding manner, two guide sliding parts 2306 of the base 23 are respectively inserted into two sliding grooves 2516 of the linkage piece 250 in a sliding manner, a first abutting surface 2421 of the first abutting piece 240 can be abutted against a first limiting part 2536a, a second limiting part 2536b or a first damping part 2536c of the first rotating plate 2536 in a sliding manner, a side surface of the first rotating plate 2536 deviating from the first limiting part 2536a is abutted against a corresponding first limiting surface 2371 in a sliding manner, a second abutting surface 2471 of the second abutting piece 245 can be abutted against a third limiting part 2556a, a fourth limiting part 2556b or a second damping part 2556c of the second rotating plate 2556 in a sliding manner, and a side surface of the second rotating plate 2536 is abutted against a corresponding limiting surface 2581 in a sliding manner; the first side supporting member 273 and the second side supporting member 275 are respectively disposed at two opposite sides of the front surface of the linkage member 250, the first adjusting arm 2734 of the first side supporting member 273 is movably sleeved on the corresponding first adjusting shaft 2366, that is, the first adjusting shaft 236 slides and rotationally passes through the first adjusting groove 2733 of the first adjusting arm 2734, the first circular arc rail 2731 of the first side supporting member 273 is rotatably inserted into the first circular arc groove 2535 of the first rotating member 253, and the first supporting portion 2534 is opposite to the first avoidance port 2736 of the first side supporting member 273; the second adjusting walls 2754 of the second side supporting members 275 are movably sleeved on the corresponding second adjusting shafts 2367, that is, the second adjusting shafts 2367 slide and rotationally penetrate through the second adjusting grooves 2753 of the second adjusting arms 2754, the second circular arc rails 2751 of the second side supporting members 275 are rotatably inserted into the second circular arc grooves 2555 of the second rotating members 255, and the second supporting portions 2554 are opposite to the second avoidance openings 2756 of the second side supporting members 275. The base 23 is accommodated in the accommodating groove 280 of the back cover 28, and the base 23 is fixedly connected with the back cover 28.

At this time, the first abutting piece 240 and the second abutting piece 245 are offset from each other along the first direction (i.e., the X-axis direction), and the first abutting piece 240 and the second abutting piece 245 are offset from each other along the second direction (i.e., the Y-axis direction); the first elastic member 260 and the second elastic member 265 are offset from each other along a first direction (i.e., the X-axis direction), and the first elastic member 260 and the second elastic member 265 are offset from each other along a second direction (i.e., the Y-axis direction), the first direction being perpendicular to the second direction; the first elastic member 260 elastically pushes the first pushing member 240 to push the first rotating plate 2536, and the second elastic member 265 elastically pushes the second pushing member 245 to push the second rotating plate 2556. The first abutting element 240, the second abutting element 245, the first elastic element 260 and the second elastic element 265 are respectively aligned with the linkage element 250 along a third direction (i.e. the Z-axis direction), specifically, the first transmission portion 2531 and the first abutting element 240 are aligned along the third direction (i.e. the Z-axis direction), and the second transmission portion 2551 and the second abutting element 245 are aligned along the third direction (i.e. the Z-axis direction), which is perpendicular to the first direction and the second direction. Since the first abutting part 240 and the second abutting part 245 of the rotating shaft assembly 22 are offset from each other in the X-axis direction and the Y-axis direction, the first elastic part 260 and the second elastic part 265 are offset from each other in the X-axis direction and the Y-axis direction, the first transmission part 2531 of the first rotating part 253, the first rotating plate 2536 and the second transmission part 2531 of the first supporting part 2534 and the second rotating part 255, the second rotating plate 2556 and the second supporting part 2554 are offset from each other in the X-axis direction and the Y-axis direction, and the base 23 and the linkage part 250 are offset from each other in the Z-axis direction, the connection of the elements of the rotating shaft assembly 22 is compact. The first limiting portion 2536a, the second limiting portion 2536b and the first damping portion 2536c of the first rotating member 253 are located on one side of the first rotating plate 2536 facing the first abutting member 240; the third limiting portion 2556a, the fourth limiting portion 2556b and the second damping portion 2556c of the second rotating member 255 are located on a side of the second rotating plate 2556 facing the second abutting member 245.

When the first and second side supports 273 and 275 are in the completely flattened state, the first and second adjusting shafts 2366 and 2367 are positioned at the first and third positioning sections 2733a and 2753a of the first and second side supports 273 and 275, respectively; the first propping piece 240 is pushed by the first elastic piece 260 to enable the first propping surface 2421 to prop against the first limiting portion 2536a of the first rotating piece 253, the second propping piece 245 is pushed by the second elastic piece 265 to enable the second propping surface 2471 to prop against the third limiting portion 2556a of the second rotating piece 255, so that the first rotating piece 253 and the second rotating piece 255 are limited relative to the base 23 to limit the linkage piece 250 to slide relative to the base 23, the first side supporting piece 273 and the second side supporting piece 275 are kept in a stable and completely flattened state, and the front face of the first side supporting piece 273 is coplanar with the front face of the second side supporting piece 275. Preferably, the first side support 273 and the second side support 275 face each other in contact, i.e., the interval between the first side support 273 and the second side support 275 is small. When the first side supporting member 273 and the second side supporting palm 275 are in the fully folded state, the first adjusting shaft 2366 and the second adjusting shaft 2367 are positioned at the second positioning section 2733b of the first side supporting member 273 and the fourth positioning section 2753b of the second side supporting member 275, respectively; the first propping piece 240 is propped against the first propping top surface 2421 and the second limiting part 2536b of the first rotating piece 253 under the pushing of the first elastic piece 260, the second propping piece 245 is propped against the second limiting part 2556b of the second rotating piece 255 under the pushing of the second elastic piece 265, the first rotating piece 253 and the second rotating piece 255 are limited relative to the base 23, so that the linkage piece 250 is limited to slide relative to the base 23, the first side supporting piece 273 and the second side supporting piece 275 are kept in a stable and completely folded state, and the front surface of the first side supporting piece 273, the front surface of the second side supporting piece 275 and the front surface of the linkage piece 250 enclose a water drop-shaped space, so that the bendable region 31 of the flexible screen 30 can be conveniently accommodated. When the first propping member 240 is pushed by the first elastic member 260 to make the first propping surface 2421 prop against the first damping portion 2536c and the second propping member 245 is pushed by the second elastic member 265 to make the second propping surface 2471 prop against the second damping portion 2556c, the first propping member 240 and the second propping member 245 prop against the first damping portion 2536c and the second damping portion 2556c respectively when the first side supporting member 273 and the second side supporting member 275 are in the intermediate state; so that the first side support 273 and the second side support 275 can be maintained in any folded state other than the fully flattened state and the fully folded state, so that the electronic device 100 assumes any hovering state.

It should be noted that: the completely flattened state means that the front surface of the first connecting portion 2533 and the front surface of the second connecting portion 2553 are coplanar, that is, an included angle between the front surface of the first side supporting member 273 and the front surface of the second side supporting member 275 is 180 degrees; the fully folded state means that the front surface of the first connecting portion 2533 and the front surface of the second connecting portion 2553 are parallel to each other, that is, an included angle between the front surface of the first connecting portion 2533 and the front surface of the second connecting portion 2553 is 0 degrees, and the front surface of the first side supporting member 273 and the front surface of the second side supporting member 275 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 273 and the front surface of the second side support 275 enclose a space other than the coplanar and drop-shaped space, that is, the folded state of the electronic device 100 in which the angle between the front surfaces of the two frames 21 is in a range of more than 0 degrees and less than 180 degrees, and the angle between the front surfaces of the first and second connection portions 2533 and 2553 is more than 0 degrees and less than 180 degrees.

As shown in fig. 16-25 and fig. 27-36, when the rotating shaft assembly 22 is folded from the flattened state, the first rotating member 253 is rotated about the first arc plate 2503 toward the second rotating member 255 relative to the base 23, and the first rotating plate 2536 of the first rotating member 253 is rotated about the first arc plate 2503 such that the first rotating member 253 is rotated about the first rotation axis L1 and cannot move along the first rotation axis L1; the first transmission portion 2531 slides in the first spiral groove 2504, and the two first pushing surfaces 2532 slidably push against the two first spiral surfaces 2507, respectively, so that the linkage 250 slides along the center line O toward an end far from the connection block 236. The guide rail 2515 of the linkage 250 slides in the corresponding guide chute 234, the guide slide portion 2306 of the base 23 slides in the corresponding chute 2516, and the first abutment surface 2421 of the first abutment 240 is disengaged from the first stop portion 2536a and slides relative to the first damping portion 2536c of the first rotation plate 2536 until the first abutment surface 2421 abuts the second stop portion 2536b. Meanwhile, the sliding of the linkage member 250 can drive the second transmission portion 2551 in the second spiral groove 2505 to rotate relative to the base 23, and the two second spiral surfaces 2508 respectively slidably abut against the two second pushing surfaces 2552, so that the second rotating plate 2556 of the second transmission member 255 rotates along the second limiting groove 238 of the base 23, and the second rotating plate 2556 can only rotate around the second rotation axis L2 but cannot slide along the direction of the second rotation axis L2, so that the second rotating member 255 rotates along with the second transmission portion 2551 relative to the base 23; therefore, the first rotating member 255 rotates with the first transmission portion 2531 relative to the base 23, and the second rotating member 255 moves toward each other as the second transmission portion 2551 rotates relative to the base 23. Meanwhile, in the process that the first rotating member 253 rotates relative to the first arc plate 2503 and the second rotating member 255 rotates relative to the second arc plate 2506, the first rotating member 253 and the first side supporting member 273 rotate relative to each other through the cooperation of the first arc rail 2731 and the first arc groove 2535, and the second rotating member 255 and the second side supporting member 275 rotate relative to each other through the cooperation of the second arc rail 2751 and the second arc groove 2555, so that the first adjusting arm 2734 of the first side supporting member 273 is rotationally and slidingly connected with the first adjusting shaft 2366, and the second adjusting arm 2754 of the second side supporting member 275 is rotationally and slidingly connected with the second adjusting shaft 2367. That is, the first adjusting shaft 2366 rotates and slides from the first positioning segment 2733a to the second positioning segment 2733b in the first adjusting groove 2733, the second adjusting shaft 2367 rotates and slides from the third positioning segment 2753a to the fourth positioning segment 2753b in the second adjusting groove 2753, so that the first side supporting member 273 and the second side supporting member 275 on opposite sides of the base 23 are close to each other until the first adjusting shaft 2366 is limited to the second positioning segment 2733b and the second adjusting shaft 2367 is limited to the fourth positioning segment 2753b, the first abutting surface 2421 of the first abutting member 240 is limited to the second limiting portion 2536b, and the second abutting surface 2471 of the second abutting member 245 is limited to the fourth limiting portion 2556b, so as to prevent the first abutting member 240 and the second abutting member 245 from rotating, and the front surface of the first side supporting member 273 and the front surface of the second side supporting member 275 enclose a cross section into a water drop shape.

In other bending modes of the rotating shaft assembly 22, the second moving member 255 can be rotated about the second circular arc plate 2506 toward the first rotating member 253 relative to the base 23, and the second rotating plate 2556 of the second moving member 255 can be rotated about the second circular arc plate 2506, such that the second moving member 255 can rotate about the second rotational axis L2 and cannot move along the second rotational axis L2; the second transmission portion 2551 slides in the second spiral groove 2505, and the two second pushing surfaces 2552 slidably push against the two second spiral surfaces 2508, respectively, so that the linkage 250 slides along the center line O toward an end far from the connection block 236. The guide rail 2515 of the linkage 250 slides in the corresponding guide slot 234, the guide slide portion 2306 of the base 23 slides in the corresponding guide slot 2516, and the second abutment surface 2471 of the second abutment 245 is disengaged from the limit of the third limit portion 2556a and slides relative to the second damping portion 2556c of the second rotation plate 2556 until the second abutment surface 2471 abuts against the fourth limit portion 2556b. Meanwhile, the sliding of the linkage member 250 can drive the first transmission portion 2531 in the second spiral groove 2504 to rotate relative to the base 23, and the two first spiral surfaces 2507 respectively slidably abut against the two first pushing surfaces 2532, so that the first rotating plate 2536 of the second transmission member 253 rotates along the first limiting groove 237 of the base 23, and the first rotating plate 2536 can only rotate about the first rotation axis L1 and cannot slide along the direction of the first rotation axis L1, so that the first rotating member 253 rotates along with the first transmission portion 2531 relative to the base 23; therefore, the first rotating member 255 rotates with the first transmission portion 2531 relative to the base 23, and the second rotating member 255 moves toward each other as the second transmission portion 2551 rotates relative to the base 23. Meanwhile, in the process that the second rotating member 255 rotates relative to the second circular arc plate 2506 and the first rotating member 253 rotates relative to the first circular arc plate 2503, the first rotating member 253 and the first side supporting member 273 rotate relative to each other through the cooperation of the first circular arc rail 2731 and the first circular arc groove 2535, and the second rotating member 255 and the second side supporting member 275 rotate relative to each other through the cooperation of the second circular arc rail 2751 and the second circular arc groove 2555, so that the first adjusting arm 2734 of the first side supporting member 273 is rotationally and slidingly connected with the first adjusting shaft 2366, and the second adjusting arm 2754 of the second side supporting member 275 is rotationally and slidingly connected with the second adjusting shaft 2367. That is, the first adjusting shaft 2366 rotates and slides from the first positioning segment 2733a to the second positioning segment 2733b in the first adjusting groove 2733, the second adjusting shaft 2367 rotates and slides from the third positioning segment 2753a to the fourth positioning segment 2753b in the second adjusting groove 2753, so that the first side supporting member 273 and the second side supporting member 275 on opposite sides of the base 23 are close to each other until the first adjusting shaft 2366 is limited to the second positioning segment 2733b and the second adjusting shaft 2367 is limited to the fourth positioning segment 2753b, the first abutting surface 2421 of the first abutting member 240 is limited to the second limiting portion 2536b, and the second abutting surface 2471 of the second abutting member 245 is limited to the fourth limiting portion 2556b, so as to prevent the first abutting member 240 and the second abutting member 245 from rotating, and the front surface of the first side supporting member 273 and the front surface of the second side supporting member 275 enclose a cross section into a water drop shape.

In other bending modes, the first rotating member 253 and the second rotating member 255 can be simultaneously rotated around the first arc plate 2503 and the second arc plate 2506 respectively in opposite directions relative to the base 23, the first adjusting shaft 2366 rotates and slides in the first adjusting groove 2733, and the second adjusting shaft 2367 rotates and slides in the second adjusting groove 2753, so that the first supporting member 273 and the second supporting member 275 are close to each other until the first adjusting shaft 2366 is limited to the second positioning section 2733b and the second adjusting shaft 2367 is limited to the fourth positioning section 2753b; meanwhile, the first pushing surface 2532 of the first transmission portion 2531 and the second pushing surface 2552 of the second transmission portion 2551 synchronously push the first spiral surface 2507 and the second spiral surface 2508 respectively, so that the linkage member 250 slides relative to the base 23 along the direction of the center line O until the first pushing surface 2421 is positioned on the second limiting portion 2536b and the second pushing surface 2471 is positioned on the fourth limiting portion 2556b, so as to prevent the first pushing member 240 and the second pushing member 245 from rotating, and the front surface of the first side supporting member 273 and the front surface of the second side supporting member 275 enclose a cross section into a water drop shape.

During the bending process of the first side supporting member 273 and the second side supporting member 275 relative to the base 23, the first circular arc rail 2731 on the first side supporting member 273 and the second circular arc rail 2751 on the second side supporting member 275 simultaneously rotate in the first circular arc groove 2535 of the first rotating member 253 and the second circular arc groove 2555 of the second rotating member 255, respectively, and simultaneously, the first adjusting shaft 2366 and the second adjusting shaft 2367 simultaneously rotate and slide in the first adjusting groove 2733 and the second adjusting groove 2753, respectively. Specifically, the first adjustment shaft 2366 is displaced from the first positioning segment 2733a to the second positioning segment 2733b, and the second adjustment shaft 2367 is displaced from the third positioning segment 2753a to the fourth positioning segment 2753b; simultaneously, the first transmission portion 2531 and the second transmission portion 2551 rotate synchronously in the first spiral groove 2504 and the second spiral groove 2505 respectively, the first pushing surface 2532 and the second pushing surface 2552 slidably push the first spiral surface 2507 and the second spiral surface 2508 respectively, so that the linkage 250 gradually moves away from the connecting block 236 along the direction of the center line O, the first pushing surface 2421 slides relative to the first damping portion 2536c out of the limit with the first limit portion 2536a until the first pushing surface 2421 pushes against the second limit portion 2536b, and the second pushing surface 2471 slides relative to the second damping portion 2556c out of the limit with the third limit portion 2556a until the second pushing surface 2471 pushes against the fourth limit portion 2556b. The first rotating member 253 rotates around the first connecting portion 2501 to drive the linkage member 250 to slide relative to the base 23, and the linkage member 250 synchronously drives the second rotating member 255 to rotate around the second connecting portion 2502, so that synchronous folding of the first rotating member 253 and the second rotating member 255 is realized; or the second rotating member 255 rotates around the second connecting portion 2502 to drive the linkage member 250 to slide relative to the base 23, and the linkage member 250 synchronously drives the first rotating member 253 to rotate around the first connecting portion 2501, so that synchronous folding of the first rotating member 253 and the second rotating member 255 is realized. Therefore, the linkage mechanism of the rotating shaft assembly 22 is realized without adopting the meshing of gears, so that the structure of the rotating shaft assembly 22 is simple, the manufacturing cost is low, the whole volume of the rotating shaft assembly 22 is reduced, and the miniaturization development of products is facilitated; second, when the first abutment surface 2421 slides relative to the first damping portion 2536c and the second abutment surface 2471 slides relative to the second damping portion 2556c, the frictional resistance between the first abutment 240 and the first rotating plate 2536 and the frictional resistance between the second abutment 245 and the second rotating plate 2556 enable the first and second rotating members 253 and 255 to be positioned relative to the base 23 and the linkage 250 to be positioned relative to the base 23 such that the first rotating member 253 is positioned at any angle between 0 and 90 degrees relative to the base 23 and the second rotating member 255 is positioned at any angle between 0 and 90 degrees relative to the base 23; at the same time, the first and second side supports 273 and 275 are positioned at any angle between 0 and 120 degrees, respectively, with respect to the base 23, so that the electronic device 100 can achieve a large-angle hover.

When the rotating shaft assembly 22 is unfolded from the completely folded state, the movement process of each component is opposite to that when the rotating shaft assembly 22 is folded from the unfolded state, and the description is omitted.

Referring to fig. 1-5, the installed rotating shaft assembly 22 is disposed between the two frames 21, and two opposite sides of the rotating shaft assembly 22 are fixedly connected with the two frames 21 respectively. Specifically, the first side supporting member 273 and the second side supporting member 275 on opposite sides of the back cover 28 are respectively received in the mounting grooves 216 of the two frames 21, and one end of the first rotating member 253, which is far away from the base 23, is connected to one of the frames 21, and one end of the second rotating member 255, which is far away from the base 23, 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 273, and the front surfaces of the second side supports 275 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 assembly 22; specifically, the bendable region 31 is attached to the front surface of the first side supporting member 273 and the front surface of the second side supporting member 275 of the rotating shaft assembly 22, and the two non-bendable regions 33 are attached to the front surfaces 211 of the two frames 21, respectively. Because the rotating shaft assembly 22 can realize synchronous flattening or synchronous folding only through the cooperation of the base 23, the linkage member 250, the first rotating member 253, the second rotating member 255, the first side supporting member 273 and the second side supporting member 275, the rotating shaft assembly 22 has less elements, simple structure and low manufacturing cost, occupies less internal space of the back cover 28, and is beneficial to leaving enough space for placing heat dissipation materials, flexible flat cables or other elements and the like in the back cover 28. Secondly, the overall size of the rotating shaft assembly 22 is smaller, so that the space occupied by the rotating shaft assembly 22 in the housing 20 is reduced, which is beneficial to the layout of other components such as a motherboard or a battery, and is beneficial to the miniaturization and the thinning of the electronic device 100.

Referring to fig. 1-5 and fig. 26-36, when the electronic device 100 is folded, a bending force is applied to at least one of the two frames 21 of the electronic device 100, so that the first rotating member 253 and the second rotating member 255 connected to the two frames 21 rotate relative to the base 23 in a direction towards each other, the side of the first side support 273 away from the base 23 rotates relative to the first rotating member 253, the first side support 273 is connected with the base 23 in a sliding manner by the cooperation of the first adjusting shaft 2366 and the first adjusting groove 2733, the side of the second side support 273 away from the base 23 rotates relative to the second rotating member 255, and the second side support 273 is connected with the base 23 in a sliding manner by the cooperation of the second adjusting shaft 2367 and the second adjusting groove 2753, so as to realize synchronous folding of the rotating shaft assembly 22, and the bendable region 31 of the flexible screen 30 is folded along with the rotating shaft assembly 22. Specifically, if a bending force is applied to the frame 21 connected to the first rotating member 253, the frame 21 drives the first rotating member 253 to rotate around the first connecting portion 2501 to a side close to the flexible screen 30 relative to the base 23, that is, the first rotating plate 2536 rotates relative to the first circular arc plate 2503, the first transmitting portion 2531 rotates in the first spiral groove 2504 to push the linkage member 250 to slide along the center line O away from the connecting block 236, and at the same time, the sliding of the linkage member 250 drives the second transmitting portion 2551 in the second spiral groove 2505 to synchronously rotate around the second connecting portion 2502 relative to the base 23, that is, the second rotating plate 2556 rotates around the second circular arc plate 2506, so that the second rotating member 255 rotates to a side close to the flexible screen 30, thereby realizing that the first rotating member 253 and the second rotating member 255 synchronously rotate relative to the base 23 to approach each other. Meanwhile, the first rotating member 253 and the first side supporting member 273 are rotated by the cooperation of the first circular arc rail 2731 and the first circular arc groove 2535, the second rotating member 255 and the second side supporting member 275 are rotated by the cooperation of the second circular arc rail 2751 and the second circular arc groove 2555, the first adjusting shaft 2366 and the second adjusting shaft 2367 on the base 23 slide and rotate in the first adjusting groove 2733 and the second adjusting groove 2753, respectively, that is, the first adjusting shaft 2366 slides and rotationally moves from the first positioning section 2733a to the second positioning section 2733b of the first adjusting groove 2733, and the second adjusting shaft 2367 slides and rotationally moves from the second adjusting groove 2753 to the fourth positioning section 2753b of the third positioning section 2753 a; the first rotating member 253 and the first side supporting member 273 rotate through the cooperation of the first circular arc rail 2731 and the first circular arc groove 2535, the second rotating member 255 and the second side supporting member 275 rotate through the cooperation of the second circular arc rail 2751 and the second circular arc groove 2555, so that the first side supporting member 273 and the second side supporting member 275 on two opposite sides of the base 23 are close to each other until the first adjusting shaft 2366 is limited at the second positioning section 2733b and the second adjusting shaft 2367 is limited at the fourth positioning section 2753b, the first abutting surface 2421 of the first abutting member 240 is limited at the second limiting portion 2536b, the second abutting surface 2471 of the second abutting member 245 is limited at the fourth limiting portion 2556b, and therefore the first abutting member 240 and the second abutting member 245 are prevented from rotating, the linking member 250 is prevented from sliding relative to the base 23, and the front surface of the first side supporting member 273 and the front surface of the second side supporting member 275 enclose a cross section into a waterdrop shape; the bendable region 31 of the flexible screen 30 is bent along with the rotating shaft assembly 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 apparatus 100 is flattened, a deployment force is applied to at least one of the two housings 21 of the electronic apparatus 100, the first rotating member 253 and the second rotating member 255 connected to the two housings 21 are rotated in directions away from each other with respect to the base 23, the side of the first side support 273 away from the base 23 is rotated with respect to the first rotating member 253, the first side support 273 and the base 23 are rotatably and slidably connected with each other by the engagement of the first adjusting shaft 2366 with the first adjusting groove 2733, the side of the second side support 273 away from the base 23 is rotated with respect to the second rotating member 255, and the second side support 273 and the base 23 are rotatably and slidably connected with each other by the engagement of the second adjusting shaft 2367 with the second adjusting groove 2753, so that the hinge assembly 22 is deployed, and the bendable region 31 of the flexible screen 30 is flattened with the hinge assembly 22. Specifically, if a deployment force is applied to the frame 21 connected to the first rotating member 253, the frame 21 drives the first rotating member 253 to rotate about the first connecting portion 2501 relative to the base 23 toward a side away from the flexible screen 30, that is, the first rotating plate 2536 rotates relative to the first circular arc plate 2503; the rotation of the first transmission part 2531 in the first spiral groove 2504 pushes the linkage piece 250 to slide along the central line O to be far away from the positioning piece 261, meanwhile, the sliding of the linkage piece 250 drives the second transmission part 2551 in the second spiral groove 2505 to synchronously rotate relative to the base 23 around the second connection part 2502, namely the second rotation plate 2556 rotates relative to the second circular arc plate 2506, so that the second rotation piece 255 synchronously rotates to the side far away from the flexible screen 30, and the first rotation piece 253 and the second rotation piece 255 synchronously rotate relative to the base 23 to be far away from each other; meanwhile, the first rotating member 253 and the first side supporting member 273 are rotated by the cooperation of the first circular arc rail 2731 and the first circular arc groove 2535, and the first adjusting shaft 2366 slides and rotates in the first adjusting groove 2733, that is, the first adjusting shaft 2366 slides and rotationally moves from the second positioning section 2733b of the first adjusting groove 2733 to the first positioning section 2733a; the second rotating member 255 and the second side supporting member 275 rotate through the cooperation of the second circular arc rail 2751 and the second circular arc groove 2555, the second adjusting shaft 2367 slides in the second adjusting groove 2753 and rotates, that is, the second adjusting shaft 2367 slides from the fourth positioning section 2753b of the second adjusting groove 2753 and rotationally moves to the third positioning section 2753a, so that the first side supporting member 273 and the second side supporting member 275 on opposite sides of the base 23 are far away from each other until the first adjusting shaft 2366 is limited in the first positioning section 2733a and the second adjusting shaft 2367 is limited in the third positioning section 2753a, and the first abutting surface 2421 is limited in the second limiting portion 2536b and the second abutting surface 2471 is limited in the fourth limiting portion 2556b, so that the first side supporting member 273 and the second side supporting member 275 on opposite sides of the base 23 are mutually unfolded until the first side supporting member 273 and the second side supporting member 275 are in a flattened state, and the bendable region 31 of the flexible screen 30 is completely unfolded along with the bending assembly 22 of the flexible screen 30, thereby realizing the complete unfolding of the electronic screen 100.

The rotating shaft assembly 22 of the electronic device 100 of the invention realizes synchronous bending or synchronous unfolding through synchronous rotation of the first rotating piece 253 and the second rotating piece 255 relative to the base 23, and is convenient to operate; the rotating shaft assembly 22 has fewer elements, simple structure and low manufacturing cost, reduces the space occupied by the rotating shaft assembly 22 in the shell 20, and is beneficial to the layout of other elements such as a main board or a battery. Secondly, when the electronic device 100 is in the fully folded state, the first adjusting shaft 2366 is limited to the second positioning section 2733b and the second adjusting shaft 2367 is limited to the fourth positioning section 2753b, and the first supporting top surface 2421 is limited to the second limiting portion 2536b and the second supporting top surface 2471 is limited to the fourth limiting portion 2556b, so that each element is not easy to shift when the electronic device 100 falls, and damage to the flexible screen 30 is avoided; when the electronic device 100 is in the completely flattened state, the first adjusting shaft 2366 is limited to the first positioning segment 2733a and the second adjusting shaft 2367 is limited to the third positioning segment 2753a, and the first supporting top surface 2421 is limited to the second limiting portion 2536a and the second supporting top surface 2471 is limited to the third limiting portion 2556a, so that each element is not easy to shift when the electronic device 100 falls down, and damage to the flexible screen 30 is avoided. In addition, the shaft assembly 22 enables the bendable region 31 of the flexible screen 30 to be positioned at any bending angle through the friction resistance between the first supporting top surface 2421 and the first damping portion 2536c and the friction resistance between the second supporting top surface 2471 and the second damping portion 2556c, so that the two frames 21 can be freely adjusted in the unfolded state, the folded state and the 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 to 180 degrees, and the hovering angle range is large.

Referring to fig. 37-42, the structure of the spindle assembly in the second embodiment of the present application is similar to that of the spindle assembly in the first embodiment, except that: the connection relationship between the first rotating member and the second rotating member in the rotating shaft assembly 22a in the second embodiment and the base and the link, respectively, is slightly different from that in the first embodiment described above. Specifically, the first rotating member 253a of the rotating member 22a and the base 23a in the second embodiment are rotationally connected by matching a third circular arc rail with a third circular arc groove, the axis of the third circular arc groove is collinear with the axis of rotation between the first rotating member 253a and the base 23a, the third circular arc rail is provided on one of the first rotating member 253a and the base 23a, and the third circular arc groove is provided on the other of the first rotating member 253a and the base 23 a; the second rotating member 255a is rotatably connected to the base 23a by a fourth circular arc rail and a fourth circular arc groove, the axis of the fourth circular arc rail is collinear with the axis of rotation between the second rotating member 255a and the base 23a, the fourth circular arc rail is provided on one of the second rotating member 255a and the base 23a, and the fourth circular arc groove is provided on the other of the second rotating member 255a and the base 23 a.

The first rotating member 253a further includes a third arc rail 2539 disposed on the first rotating plate 2536, the base 23a is provided with a third arc groove 2373 on a side surface of the first limiting groove 237, an axis of the third arc groove 2373 is collinear with a rotation axis between the first rotating member 253a and the base 23a, and the third arc rail 2539 is rotatably accommodated in the third arc groove 2373; the second rotating member 255a further includes a fourth arc rail 2559 disposed on the second rotating plate 2556, the base 23a is provided with a fourth arc groove 2383 on a side surface of the second limiting groove 238, an axis of the fourth arc groove 2383 is collinear with a rotational axis between the second rotating member 255a and the base 23a, and the fourth arc rail 2559 is rotatably accommodated in the fourth arc groove 2383. In the present embodiment, the base 23a is formed by adding a pair of third circular arc grooves 2373 and a pair of fourth circular arc grooves 2383 to the base 23 in the first embodiment, the first rotating member 253a is formed by omitting the first stop plate from the first rotating member 253 in the first embodiment, and adding a pair of third circular arc rails 2539; the second rotating member 255a is formed by omitting the second stopper plate and adding a pair of fourth circular arc rails 2559 on the basis of the second rotating member 255 in the first embodiment; the pair of third circular arc rails 2539 are rotatably accommodated in the pair of third circular arc grooves 2373, respectively, and the pair of fourth circular arc rails 2559 are rotatably accommodated in the pair of fourth circular arc grooves 2383, respectively. Specifically, the base 23a is provided with a pair of third circular arc grooves 2373 on two opposite sides of the first limiting groove 237, that is, each first limiting surface 2371 of the base 23a is provided with a third circular arc groove 2373, and the first connecting groove 2313 is communicated with the third circular arc grooves 2373; the base 23a is provided with a pair of fourth arc grooves 2383 on two opposite sides of the second limiting groove 238, that is, each second limiting surface 2381 of the base 23a is provided with a fourth arc groove 2383, and the second connecting groove 2323 is communicated with the fourth arc grooves 2383. The side surface of the first rotating plate 2536 of the first rotating member 253a, which faces away from the first transmission portion 2531, is provided with a first circular arc plate, the axial line of the first circular arc plate is collinear with the axial line of the rotating shaft between the first rotating member 253a and the base 23a, one end of the first circular arc plate is connected with the first supporting portion 2534, and two opposite sides of the first circular arc plate extend out of two opposite sides of the first rotating plate 2536 respectively to form a pair of third circular arc rails 2539; when the pair of third circular arc rails 2539 are rotatably accommodated in the pair of third circular arc grooves 2373, the first supporting top surface 2421 of the first supporting member 240 can slidably support against the third circular arc rails 2539; the side surface of the second rotating plate 2556 of the second rotating member 255a, which faces away from the second transmission portion 2551, is provided with a second circular arc plate, the axial line of the second circular arc plate is collinear with the axial line of the rotation shaft between the second rotating member 255a and the base 23a, one end of the second circular arc plate is connected to the second supporting portion 2554, and two opposite sides of the second circular arc plate extend out of two opposite sides of the second rotating plate 2556 respectively to form a pair of fourth circular arc rails 2559; when the pair of fourth circular arc rails 2559 are rotatably accommodated in the pair of fourth circular arc grooves 2383, respectively, the second abutting surface of the second abutting member 245 slidably abuts against the third circular arc rails 2559.

When the first rotating member 253a is mounted to the base 23a, the pair of third circular arc rails 2539 are rotatably received in the pair of third circular arc grooves 2373, respectively, to prevent the first rotating member 253a from being separated from the base 23a when rotating relative to the base 23a; the first rotating plate 2536 is rotatably accommodated in the first limiting groove 237, and opposite side surfaces of the first rotating plate 2536 respectively slidably abut against the two first limiting surfaces 2371, so as to prevent the first rotating member 253a from moving along the X-axis direction when rotating relative to the base 23a, and the first rotating surface 2537 of the first rotating plate 2536 is rotatably attached to the back surface of the first circular arc plate 2503; the first transmission portion 2531 is rotatably accommodated in the first spiral groove 2504 of the linkage member 250, and two first pushing surfaces 2532 of the first transmission portion 2531 respectively abut against two first spiral surfaces 2507, and when the first rotation member 253a rotates relative to the base 23a, the first pushing surfaces 2532 slidably abut against the first spiral surfaces 2507 to move the linkage member 250 along the X-axis direction; when the second rotating member 255a is mounted to the base 23a, a pair of fourth circular arc rails 2559 are rotatably received in a pair of fourth circular arc grooves 2383, respectively, to prevent the second rotating member 255a from being separated from the base 23a when rotated relative to the base 23a; the second rotating plate 2556 is rotatably accommodated in the second limiting groove 238, and opposite side surfaces of the second rotating plate 2556 respectively slidably abut against the two second limiting surfaces 2381, so as to prevent the second rotating member 255a from moving along the X-axis direction when rotating relative to the base 23a, and the second rotating surface 2557 of the second rotating plate 2556 is rotatably attached to the back surface of the second circular arc plate 2506; the second transmission portion 2551 is rotatably accommodated in the second spiral groove 2505 of the linkage member 250, and two second pushing surfaces 2552 of the second transmission portion 2551 respectively abut against the two second spiral surfaces 2508, and when the second rotation member 255a rotates relative to the base 23a, the second pushing surfaces 2552 slidably abut against the second spiral surfaces 2508 to move the linkage member 250 along the X-axis direction.

When the first rotating member 253a rotates about the first arc plate 2503 relative to the base 23a, the pair of third arc rails 2539 of the first rotating member 253a rotate in the pair of third arc grooves 2373, respectively, and the first rotating plate 2536 rotates about the first arc plate 2503 such that the first rotating member 253a rotates about the first rotational axis L1 and cannot move in the direction of the first rotational axis L1; the first transmission part 2531 slides in the first spiral groove 2504, and the two first pushing surfaces 2532 respectively slidably push the two first spiral surfaces 2507, so that the linkage piece 250 slides along the direction of the central line O; meanwhile, the sliding of the linkage member 250 can drive the second transmission portion 2551 in the second spiral groove 2505 to rotate relative to the base 233a, the two second spiral surfaces 2508 respectively slidably abut against the two second pushing surfaces 2552, so that the second rotating plate 2556 of the second transmission member 2553a rotates along the second limiting groove 238 of the base 233a, the second rotating plate 2556 can only rotate around the second rotation axis L2 and cannot slide along the direction of the second rotation axis L2, and the pair of fourth circular arc rails 2559 respectively slide in the pair of fourth circular arc grooves 2383, so that the second rotating member 2553a rotates along with the second transmission portion 2551 relative to the base 23; therefore, the first rotating member 2553a rotates with the first transmission portion 2531 relative to the base 23a3, and the second rotating member 2553a rotates with the second transmission portion 2551 relative to the base 233a to be close to or open out from each other.

In some embodiments, the base 23a is provided with a pair of third circular arc rails on two opposite sides of the first limiting groove 237, that is, each first limiting surface 2371 of the base 23a is provided with a third circular arc rail, and the first rotating member 253a is provided with third circular arc grooves on two opposite sides of the first rotating plate 2536 respectively; when the first rotating member 253a is mounted to the base 23a, a pair of third circular arc rails are rotatably accommodated in the pair of third circular arc grooves, respectively; the base 23a is provided with a pair of fourth circular arc rails on two opposite sides of the second limiting groove 238, that is, each second limiting surface 2381 of the base 23a is provided with a fourth circular arc rail, the second rotating member 255a is respectively provided with a fourth circular arc groove on two opposite sides of the second rotating plate 2556, and when the second rotating member 255a is mounted on the base 23a, the pair of fourth circular arc rails are respectively rotatably accommodated in the pair of fourth circular arc grooves.

In some embodiments, the base 23a is provided with a third circular arc groove on one side surface of the first limiting groove 237, preferably a side surface close to the first propping member 240, the third circular arc groove is communicated with the first connecting groove 2313, the first rotating member 253a is provided with a third circular arc rail rotatably accommodated in the third circular arc groove, and the first propping surface 2421 of the first propping member 240 can be propped against the third circular arc rail in a sliding manner; the base 23a is provided with a fourth arc groove on one side surface of the second limiting groove 238, preferably, a side surface close to the second propping member 245 is provided with a fourth arc groove, the fourth arc groove is communicated with the second connecting groove 2323, the second rotating member 255a is provided with a fourth arc rail rotatably accommodated in the fourth arc groove, and the second propping surface 2471 of the second propping member 245 can be propped against the fourth arc rail in a sliding manner.

Preferably, a first limiting portion, a second limiting portion and a first damping portion disposed between the first limiting portion and the second limiting portion are disposed on the third circular arc rail 2539 facing the first connecting slot 2313, and specifically, a first limiting portion, a second limiting portion and a first damping portion are disposed on a side surface of the third circular arc rail 2539 facing the first connecting slot 2313, and the first limiting portion is closer to the first connecting portion 2533 than the second limiting portion. And/or a third limiting part, a fourth limiting part and a second damping part positioned between the third limiting part and the fourth limiting part are arranged on the fourth arc plate 2559; specifically, a side surface of the fourth arc plate 2559 facing the second connection groove 2323 is provided with a third limiting portion, a fourth limiting portion b and a second damping portion, and the third limiting portion is closer to the second connection portion 2553 than the fourth limiting portion. When the first rotating member 253a and the second rotating member 255a are in the completely flattened state, the first abutting member 240 abuts against the first abutting surface 2421 of the first rotating member 253a under the abutting action of the first elastic member 260, and the second abutting member 245 abuts against the second abutting surface 2471 of the second rotating member 255a under the abutting action of the second elastic member 265, so that the first rotating member 253a and the second rotating member 255a are limited relative to the base 23a to limit the sliding of the linkage member 250 relative to the base 23a, and the first rotating member 253a and the second rotating member 255a maintain the stable completely flattened state; when the first rotating member 253a and the second rotating member 255a are in the folded state, the first propping member 240 pushes the first propping surface 2421 against the second limiting portion of the first rotating member 253a under the pushing of the first elastic member 260, and the second propping member 245 pushes the second propping surface 2471 against the fourth limiting portion of the second rotating member 255a under the pushing of the second elastic member 265, so that the first rotating member 253a and the second rotating member 255a are limited relative to the base 23a, so as to limit the sliding of the linkage member 250 relative to the base 23a, and keep the first rotating member 253a and the second rotating member 255a in a stable and fully folded state; when the first propping element 240 is propped against the first damping portion by the first propping element 260 and the first propping surface 2421 is propped against the second damping portion by the second propping element 245 and the second propping surface 2471 is propped against the second damping portion by the second elastic element 265, the first rotating element 253a and the second rotating element 255a are in an intermediate state, so that the first rotating element 253a and the second rotating element 255a can be kept in any folded state except the fully flattened state and the fully folded state, and the electronic device 100 can be in any hovering state.

Referring to fig. 43-45, the structure of the rotating shaft assembly in the third embodiment of the present application is similar to that of the rotating shaft assembly in the first embodiment, except that: one end of a first adjusting groove 2733 on a first adjusting arm 2734 of the first side support 273 is penetrated through one end of the first adjusting arm 2734 to facilitate mounting of the first side support 273 to the base 23; one end of a second adjusting groove 2753 on a second adjusting arm 2754 of the second side support 275 is penetrated through one end of the second adjusting arm 2754 to facilitate mounting of the second side support 275 to the base 23. Specifically, an end of the first adjusting groove 2733 on the first adjusting arm 2734, which is far from the first circular arc rail 2731, penetrates through an end of the first adjusting arm 2734 to form a first insertion port 2733c, and an end of the second adjusting groove 2753 on the second adjusting arm 2754, which is far from the second circular arc rail 2751, penetrates through an end of the second adjusting arm 2734 to form a second insertion port 2753c. When the first side supporting member 273 is mounted to the base 23, after the first regulating shaft 2366 is fixed to the base 23, the first regulating shaft 2366 is inserted directly from the first insertion port 2733c into the first regulating groove 2733; when the second side support 275 is mounted to the base 23, the second adjusting shaft 2367 is fixed to the base 23, and then the second adjusting shaft 2367 is directly inserted into the second adjusting groove 2754 from the second insertion port 2753 c; the first and second side supporters 273 and 275 are conveniently installed, the installation efficiency is improved, and the assembly cost is reduced.

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 linkage piece is connected to the base and can slide relative to the base along a first direction, and the linkage piece comprises a first connecting part and a second connecting part;

the first rotating piece is arranged on one side of the base, and the first rotating piece is connected with the first connecting part in a matched rotating way through a first spiral groove and a first transmission part;

the second rotating piece is arranged on the other side opposite to the base, the second rotating piece is connected with the second connecting part in a matched rotating way through a second spiral groove and a second transmission part, and the rotation directions of the first spiral groove and the second spiral groove are opposite; and

the damping mechanism is propped against the first rotating piece and/or the second rotating piece so as to limit the rotation of the first rotating piece and the second rotating piece relative to the base.

2. The spindle assembly of claim 1, further comprising a support mechanism including a first side support slidably and rotatably coupled to the base on one side, the opposite side of the first side support rotatably coupled to the first rotating member, and a second side support slidably and rotatably coupled to the base on one side, the opposite side of the second side support rotatably coupled to the second rotating member;

when the linkage piece slides along the first direction relative to the base, the first rotating piece and the second rotating piece synchronously rotate relative to the base, so that the first side supporting piece and the second side supporting piece can be mutually unfolded or mutually folded.

3. The spindle assembly of claim 2, wherein the first helical groove is provided in one of the first connection portion and the first rotating member, and the first transmission portion is provided in the other of the first connection portion and the first rotating member; the second spiral groove is arranged on one of the second rotating piece and the second connecting portion, and the second transmission portion is arranged on the other of the second rotating piece and the second connecting portion.

4. The spindle assembly of claim 1, wherein a first axis of rotation between the first rotating member and the first connecting portion is parallel to the first direction, a second axis of rotation between the second rotating member and the second connecting portion is parallel to the first direction, and the first axis of rotation and the second axis of rotation are parallel to or coincident with each other.

5. The spindle assembly of claim 1, wherein the first and second connection portions are offset from each other in the first direction and/or the first and second connection portions are offset from each other in a second direction, the first direction being parallel to a sliding direction of the linkage relative to the base, the first direction being perpendicular to the second direction, a trajectory of the linkage sliding relative to the base being parallel to a plane formed by the first and second directions.

6. A spindle assembly according to claim 3, wherein the first and second connection portions are located on opposite sides of a centerline of the linkage member, respectively, the centerline of the linkage member being parallel to the first direction; the first connecting part comprises a first circular arc plate, the axial lead of the first circular arc plate is parallel to the first direction, the first spiral groove is formed in the first circular arc plate, the first transmission part is arranged on the first rotating piece, the first transmission part comprises a first spiral rail, and the first spiral rail is rotationally accommodated in the first spiral groove; the second connecting portion comprises a second circular arc plate, the axial lead of the second circular arc plate is parallel to the first direction, the second spiral groove is formed in the second circular arc plate, the second transmission portion is arranged on the second rotating piece, the second transmission portion comprises a second spiral rail, and the second spiral rail is rotationally accommodated in the second spiral groove.

7. The spindle assembly of claim 6 wherein said first helical groove extends radially through said first arcuate plate to form two opposing first helical surfaces on said first arcuate plate, said first helical track including two opposing first abutment surfaces, said two first abutment surfaces abutting said two first helical surfaces; the second spiral groove penetrates through the second circular arc plate along the radial direction of the second circular arc plate so as to form two opposite second spiral surfaces on the second circular arc plate, the second spiral track comprises two opposite second propped top surfaces, the two second propped top surfaces are mutually attached to the two second spiral surfaces, and the rotation directions of the first spiral surfaces and the second spiral surfaces are opposite.

8. The assembly according to claim 6, wherein the damping mechanism includes a first abutment member slidably disposed on the base along the first direction, and a first elastic member providing an elastic force urging the first abutment member against the first transmission portion; and/or the damping mechanism comprises a second propping piece and a second elastic piece, wherein the second propping piece is slidably arranged on the base along the first direction, and the second elastic piece provides an elastic force for driving the second propping piece to prop against the second transmission part.

9. The spindle assembly of claim 8, wherein the first and second abutments are offset from each other in the first direction and/or the first and second abutments are offset from each other in the second direction, the first direction being parallel to a sliding direction of the linkage relative to the base, the first direction being perpendicular to the second direction, a track of the sliding of the first abutment relative to the base being parallel to a plane formed by the first and second directions.

10. The spindle assembly of claim 9, wherein the first transmission portion and the first abutment are aligned along a third direction, and the second transmission portion and the second abutment are aligned along the third direction, the third direction being perpendicular to the first direction and the second direction.

11. The spindle assembly of claim 8, wherein the first rotating member further comprises a first rotating plate, the first spiral track is connected to the first rotating plate, and the first elastic member elastically pushes the first pushing member against the first rotating plate; the second rotating piece further comprises a second rotating plate, the second spiral rail is connected to the second rotating plate, and the second elastic piece elastically pushes the second pushing piece to push the second rotating plate.

12. The pivot assembly of claim 11 wherein the first rotatable member further comprises a first stop plate, the first stop plate being connected to a side of the first spiral track facing away from the first rotatable plate, opposite sides of the first stop plate extending beyond opposite sides of the first spiral track, the first arcuate plate being disposed between the first rotatable plate and the first stop plate; the second rotating piece further comprises a second stop plate, the second stop plate is connected to one side, deviating from the second rotating plate, of the second spiral rail, two opposite sides of the second stop plate extend out of two opposite sides of the second spiral rail, and the second arc plate is arranged between the second rotating plate and the second stop plate.

13. The spindle assembly of claim 11 wherein said first rotating member further includes a third arcuate rail disposed on said first rotating plate, said base having a third arcuate slot, an axis of said third arcuate slot being collinear with an axis of rotation between said first rotating member and said base, said third arcuate rail being rotatably received in said third arcuate slot; the second rotating piece further comprises a fourth arc rail arranged on the second rotating plate, the base is provided with a fourth arc groove, the axial lead of the fourth arc groove is collinear with the axial lead of the rotation shaft between the second rotating piece and the base, and the fourth arc rail is rotatably accommodated in the fourth arc groove.

14. The rotating shaft assembly according to claim 11, wherein the first rotating plate includes a first limit portion and a second limit portion, the first limit portion and the second limit portion are located on a side of the first rotating plate facing the first abutting portion, the second rotating plate includes a third limit portion and a fourth limit portion, the third limit portion and the fourth limit portion are located on a side of the second rotating plate facing the second abutting portion, and when the first side supporting member and the second side supporting member are in a completely flattened state, the first abutting portion and the second abutting portion abut against the first limit portion and the third limit portion, respectively; when the first side supporting piece and the second side supporting piece are in a completely folded state, the first propping piece and the second propping piece respectively prop against the second limiting part and the fourth limiting part.

15. The pivot assembly of claim 14 wherein the first pivot plate further comprises a first damping portion located between the first and second limiting portions, the second pivot plate further comprises a second damping portion located between the third and fourth limiting portions, the first and second abutments abutting the first and second damping portions, respectively, when the first and second side supports are in an intermediate state.

16. The spindle assembly of claim 11, wherein the base is provided with a first limit slot and a second limit slot, the first rotating plate being rotatably disposed in the first limit slot, the second rotating plate being rotatably disposed in the second limit slot; the base is provided with first limiting surfaces at two opposite ends of the first limiting groove respectively, the first rotating plate comprises two opposite first side surfaces, and the two first side surfaces are respectively in sliding abutting connection with the two first limiting surfaces; the base is provided with second limiting surfaces at two opposite ends of the second limiting groove respectively, the second rotating plate comprises two opposite second side surfaces, and the two second side surfaces are respectively in sliding abutting connection with the two second limiting surfaces.

17. The spindle assembly of claim 8, wherein the first abutment and the base are slidably coupled by a first guide channel formed in one of the first abutment and the base and a first guide rail formed in the other of the first abutment and the base; the second propping piece is connected with the base in a sliding manner through the matching of a second guide groove and a second guide rail, the second guide groove is arranged on one of the second propping piece and the base, the second guide rail is arranged on the other of the second propping piece and the base, and the first guide groove and the second guide groove extend along the first direction.

18. The spindle assembly of claim 1, wherein the linkage and the base are slidably coupled by a mating of a guide runner provided in one of the linkage and the base and extending in the first direction, and a guide rail provided in the other of the linkage and the base.

19. The spindle assembly of claim 2, wherein the first side support is cooperatively coupled to the base with a first adjustment shaft via a first adjustment slot provided in one of the first side support and the base, the first adjustment shaft being provided in the other of the first side support and the base; the second side support piece is connected with the base through the cooperation of a second adjusting groove and a second adjusting shaft, the second adjusting groove is arranged on one of the second side support piece and the base, and the second adjusting shaft is arranged on the other of the second side support piece and the base.

20. The spindle assembly of claim 19, wherein the first side support includes a first adjustment arm, the first adjustment slot being provided in the first adjustment arm, one end of the first adjustment slot being passed through one end of the first adjustment arm to form a first insertion opening, the first adjustment shaft being inserted into the first adjustment slot from the first insertion opening; the second side support piece comprises a second adjusting arm, the second adjusting groove is formed in the second adjusting arm, one end of the second adjusting groove penetrates through one end of the second adjusting arm to form a second inserting port, and the second adjusting shaft is inserted into the second adjusting groove from the second inserting port.

21. The spindle assembly of claim 2, wherein the first side support and the first rotating member are rotatably coupled by a first arcuate slot provided in one of the first side support and the first rotating member and a first arcuate rail provided in the other of the first side support and the first rotating member; the second side support piece and the second rotating piece are connected in a matched rotation mode through a second arc groove and a second arc rail, the second arc groove is formed in one of the second side support piece and the second rotating piece, and the second arc rail is formed in the other of the second side support piece and the second rotating piece.

22. The spindle assembly of claim 2, wherein the first side support and the second side support are in contact on mutually facing sides when the first side support and the second side support are in a flattened state.

23. A folding casing, characterized in that the folding casing comprises a rotating shaft assembly and two frames according to any one of claims 1-22, the rotating shaft assembly is located between the two frames, one end of a first rotating member of the rotating shaft assembly, which is far away from a base, is connected to one of the frames, and one end of a second rotating member of the rotating shaft assembly, which is far away from the base, is connected to the other frame.

24. An electronic device, comprising a flexible screen, two frames and a rotating shaft assembly according to any one of claims 1-22, wherein the rotating shaft assembly is located between the two frames, one end of a first rotating member of the rotating shaft assembly, which is far away from a base, is connected to one of the frames, one end of a second rotating member of the rotating shaft assembly, which is far away from the base, is connected to the other frame, and the flexible screen is connected to the two frames and the rotating shaft assembly.