Rotating shaft device, folding housing and electronic equipment

Abstract

The present invention provides a shaft device, which includes a support mechanism, a rotating assembly and a linkage assembly, wherein the support mechanism includes a side support member; the rotating assembly includes a positioning seat and a rotating mechanism, the rotating mechanism includes a rotating member and a connecting member, one end of the rotating member is rotatably connected to the positioning seat, and the other end of the rotating member is rotatably connected to the connecting member; the linkage assembly includes a linkage seat and a linkage mechanism, the linkage mechanism includes a linkage member connected to opposite sides of the linkage seat, one end of the linkage member and the corresponding rotating member are connected through a first arc groove and a first guide slide shaft, one end of the linkage member and the corresponding connecting member are connected through a second arc groove and a second guide slide shaft, the side support member and the corresponding connecting member are rotatably connected, and the side support member and the corresponding rotating member are slidably connected; the rotating mechanism rotates relative to the positioning seat. The present application also provides a folding housing and an electronic device provided with a shaft device.

Description

Technical Field

[0001] The present invention relates to the field of flexible member support, and in particular to a rotating shaft device for supporting a flexible member, a folding shell provided with the rotating shaft device, and an electronic device provided with the folding shell. Background Art

[0002] With the development of display devices, bendable flexible display screens have emerged. Currently, the folding solutions of bendable flexible display screens include inward folding and outward folding, and folding screens are becoming more and more popular. Folding screens in related technologies are generally supported by hinge mechanisms, but most of the hinge structures are relatively complex and do not meet the needs of mass production. Summary of the invention

[0003] The present application provides a hinge device, a folding housing provided with the hinge device, and an electronic device provided with the folding housing.

[0004] The present application provides a rotating shaft device, which includes a supporting mechanism, a rotating assembly and a linkage assembly, wherein the supporting mechanism includes a side support member; the rotating assembly includes a positioning seat and a rotating mechanism disposed on opposite sides of the positioning seat, the rotating mechanism includes a rotating member and a connecting member, one end of the rotating member is rotatably connected to the positioning seat, and the other end of the rotating member is rotatably connected to the connecting member; the linkage assembly includes a linkage seat and a linkage mechanism disposed on the linkage seat, the linkage mechanism includes a linkage member rotatably connected to opposite sides of the linkage seat, one end of the linkage member away from the linkage seat and the corresponding rotating member are connected through a first arc groove and a first guide slide shaft, one end of the linkage member away from the linkage seat and the corresponding connecting member are connected through a second arc groove and a second guide slide shaft, the side support member is rotatably connected to the corresponding connecting member, and the side support member is slidably connected to the corresponding rotating member; the rotating mechanism rotates relative to the positioning seat to drive the linkage member to rotate relative to the linkage seat and drive the side support member to rotate and slide relative to the positioning seat, so that the two side support members are synchronously bent or unfolded with each other.

[0005] The present application also provides a folding shell, which includes a rotating shaft device and two frames, wherein the rotating shaft device is located between the two frames, and the two frames are respectively connected to the connecting parts of the two rotating mechanisms of the rotating shaft device, and the frame drives the rotating mechanism to rotate relative to the positioning seat, and the supporting mechanism realizes synchronous bending or unfolding with the rotating mechanism and the linkage mechanism.

[0006] The present application also provides an electronic device, which includes a flexible member and a folding shell, wherein the flexible member is arranged on the folding shell, and the flexible member is bent or flattened along with the folding shell.

[0007] The rotating shaft device of the present invention comprises a supporting mechanism, a rotating assembly and a linkage assembly, wherein one end of the rotating member of the rotating assembly is rotatably connected to the positioning seat, and the other end of the rotating member is rotatably connected to the connecting member; one end of the linkage member of the linkage assembly away from the linkage seat is connected to the rotating member through the cooperation of the first arc groove and the first guide slide shaft, and one end of the linkage member away from the linkage seat is connected to the connecting member through the cooperation of the second arc groove and the second guide slide shaft, the side support member is rotatably connected to the connecting member, and the side support member is slidably connected to the rotating member. The connecting member can drive the rotating member to rotate relative to the positioning seat, and the connecting member and the rotating member drive the two linkage members to rotate synchronously relative to the linkage seat, so as to drive the two side support members to fold or unfold with each other, thereby realizing the folding or flattening of the flexible member. Since the pivot device can achieve synchronous folding or synchronous flattening through the supporting mechanism, the rotating component and the linkage component, compared with the prior art in which the flexible part is supported by a hinge mechanism, the pivot device of the present application has a simple structure, a low manufacturing cost, high connection reliability between the components, and improved strength of the whole machine; secondly, the present application adopts an arc groove and a guide shaft between the rotating part and the linkage part to replace the linear slide groove and the slide rail in the prior art, thereby reducing the overall width of the pivot device, thereby reducing the internal space of the shell occupied by the pivot device, which is beneficial to the layout of other components such as the motherboard or battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 is a schematic diagram of a three-dimensional structure of an electronic device in one embodiment of the present application;

[0010] Figure 2 yes Figure 1 A schematic diagram of a three-dimensional structure of a foldable housing and a flexible part of an electronic device;

[0011] Figure 3 yes Figure 2 A schematic diagram of the three-dimensional structure of the folded shell;

[0012] Figure 4 yes Figure 3 A schematic diagram of a three-dimensional structure of the folding shell from another perspective;

[0013] Figure 5 yes Figure 3 A schematic diagram of a three-dimensional structure explosion of the rotating shaft device;

[0014] Figure 6 yes Figure 5 A schematic diagram of the three-dimensional structure of the rotating shaft device from another perspective;

[0015] Figure 7 yes Figure 5 A schematic diagram of the three-dimensional structure of the support mechanism, the rotating assembly and the folding assisting assembly of the rotating shaft device;

[0016] Figure 8 yes Figure 7 A schematic diagram of the three-dimensional structure of the rotating shaft device from another perspective;

[0017] Fig. 9 yes Figure 7 A schematic diagram of the three-dimensional structure decomposition of the rotating component and the folding-assisting component;

[0018] Fig.10 yes Fig. 9 A schematic diagram of the three-dimensional structure of the rotating component and the folding-assisting component from another perspective;

[0019] Fig.11 yes Figure 3 A magnified three-dimensional structure diagram of the rotating shaft device;

[0020] Figure 12-Figure 17 yes Fig.11 A three-dimensional cross-sectional view of different parts of the rotating shaft device;

[0021] Fig.18 yes Figure 1 A schematic diagram of a three-dimensional structure in which an electronic device is bent into one angle;

[0022] Fig.19 yes Fig.18 A magnified three-dimensional structure diagram of the rotating shaft device;

[0023] Fig. 20 yes Fig.19 A schematic diagram of a three-dimensional structure explosion of the rotating shaft device;

[0024] Figure 21-26 yes Fig.19 A cross-sectional view of different parts of the rotating shaft device in FIG.

[0025] Fig. 27 yes Figure 1 A schematic diagram of a three-dimensional structure of an electronic device in a fully bent state;

[0026] Fig.28 yes Fig. 27 A magnified three-dimensional structure diagram of the rotating shaft device;

[0027] Fig.29 yes Fig.28 A schematic diagram of the three-dimensional structure of the rotating shaft device from another perspective;

[0028] Figure 30-Figure 35 yes Fig. 27 A cross-sectional view of different parts of an electronic device. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In addition, the following descriptions of the various embodiments are made with reference to the attached drawings to illustrate specific embodiments that the present application may be implemented in. Directional terms mentioned in the present application, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set on..." should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] Please also read Figures 1 to 8The electronic device 100 in one embodiment of the present invention includes a foldable housing 20 and a flexible member 30 disposed on the foldable housing 20. The flexible member 30 may be a flexible display screen, a flexible touch screen, a flexible touch display screen, or other flexible components with corresponding functions, or a flexible component fixedly attached to a flexible support plate, such as a flexible display screen and a flexible touch screen attached to a flexible steel plate. The flexible member 30 is bent or flattened with the foldable housing 2. The foldable housing 20 includes two frames 21 and a rotating shaft device 22 connected between the two frames 21. The flexible member 30 includes a bendable region 31 corresponding to the rotating shaft device 22, and two non-bending regions 33 connected to opposite sides of the bendable region 31. The two non-bending regions 33 of the flexible member 30 may be fixed on the front of the two frames 21, respectively, and the bendable region 31 is attached to the front of the rotating shaft device 22. The bendable region 31 of the flexible member 30 is bent or flattened with the rotating shaft device 22. The rotating shaft device 22 includes a supporting mechanism 23, a rotating assembly 25, a linkage assembly 26 and a limiting mechanism 27. The linkage assembly 26 is connected to the rotating assembly 25, and the limiting mechanism 27 is connected to the linkage assembly 26. The supporting mechanism 23 includes a middle supporting member 231 and side supporting members 233 provided on opposite sides of the middle supporting member 231, and the flexible member 30 is attached to the middle supporting member 231 and the side supporting members 233. The rotating assembly 25 includes a positioning seat 251 and a rotating mechanism 253 provided on opposite sides of the positioning seat 251. The rotating mechanism 253 includes a rotating member 254 and a connecting member 256. One end of the rotating member 254 is rotatably connected to the positioning seat 251, and the other opposite end of the rotating member 254 is rotatably connected to the connecting member 256. The linkage assembly 26 includes a linkage seat 261 and a linkage mechanism 263 arranged on the linkage seat 261, the linkage mechanism 263 includes linkage members 264 rotatably arranged on opposite sides of the linkage seat 261, one end of the linkage member 264 away from the linkage seat 261 and the corresponding rotating member 254 are connected by the first arc groove 2640 and the first guide slide shaft 2540; one end of the linkage member 264 away from the linkage seat 261 and the corresponding connecting member 256 are connected by the second arc groove 2561 and the second guide slide shaft 2641, the side support member 233 and the corresponding connecting member 256 are rotatably connected, and the side support member 233 and the corresponding rotating member 254 are slidably connected; the rotating mechanism 253 rotates relative to the positioning seat 251 to drive the corresponding linkage member 264 to rotate relative to the linkage seat 261 and drive the side support member 233 to rotate and slide relative to the positioning seat 251, so that the two side support members 233 are synchronously bent or unfolded relative to the middle support member 231.

[0033] The two frames 21 of the electronic device 100 are respectively connected to the two connecting members 256 of the rotating shaft device 22. The frame 21 drives the rotating member 254 to rotate relative to the positioning seat 251 through the connecting member 256, and the connecting member 256 and the rotating member 254 drive the linkage member 264 to rotate relative to the linkage seat 261, so that the support mechanism 23 is synchronously bent or unfolded with the rotating mechanism 253 and the linkage mechanism 263, and the flexible member 30 is bent or flattened with the support mechanism 23, and the bendable area 31 can be bent into a U shape or a teardrop shape or other shapes. In this embodiment, the bendable area 31 can be bent into a teardrop shape.

[0034] In this embodiment, the front side refers to the side facing the same direction as the light-emitting surface of the flexible part 30, and the back side refers to the side facing away from the light-emitting surface of the flexible part 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 car display, and any other product and component with a display function. The "connection" in the description of the embodiment of the present invention includes both direct connection and indirect connection. For example, the connection between A and B includes A and B being directly connected or connected through a third element C or more other elements. The connection also includes two situations: an integrated connection and a non-integrated connection. An integrated connection means that A and B are formed and connected as one, and a non-integrated connection means that A and B are formed and connected as a non-integrated.

[0035] The hinge device 22 of the electronic device 100 of the present invention includes a supporting mechanism 23, a rotating assembly 25 and a linkage assembly 26. One end of the rotating member 254 of the rotating assembly 25 is rotatably connected to the positioning seat 251, and the other end of the rotating member 254 is rotatably connected to the connecting member 256; the end of the linkage member 264 of the linkage assembly 26 away from the linkage seat 261 is connected to the rotating member 254 through the cooperation of the first arc groove 2640 and the first guide slide shaft 2540, and the end of the linkage member 264 away from the linkage seat 261 is connected to the connecting member 256 through the cooperation of the second arc groove 2561 and the second guide slide shaft 2641. The side support member 233 is rotatably connected to the connecting member 256, and the side support member 233 is slidably connected to the rotating member 254. When the two frames 21 are approaching or moving away from each other, the connecting member 256 drives the rotating member 254 to rotate relative to the positioning seat 251, and the connecting member 256 and the rotating member 254 drive the two linkage members 264 to rotate synchronously relative to the linkage seat 261, so as to drive the two side support members 233 to fold or unfold with each other, thereby realizing the folding or flattening of the flexible member 30. Since the rotating shaft device 22 can realize synchronous folding or synchronous flattening through the support mechanism 23, the rotating assembly 25 and the linkage assembly 26, compared with the prior art that supports the flexible member through the hinge mechanism, the rotating shaft device 22 of the present application has a simple structure, a low manufacturing cost, and a high connection reliability between the components, and the strength of the whole machine is improved; secondly, the first arc groove 2640 on the rotating member 254 or the linkage member 264 of the present application, and the second arc groove 2561 on the linkage member 264 or the connecting member 256 are both made by open mold molding, compared with the linkage member and the rotating member in the prior art. A linear movement method is adopted between them, that is, a linear slide groove is opened on the connecting rod or the rotating part by using a CNC lathe, which increases the control cost and processing cost of opening the linear slide groove. Therefore, the manufacturing control cost and processing cost of the rotating shaft device 22 of the present application are reduced; in addition, in the present application, an arc groove and a guide shaft are used between the rotating part 254 and the linkage part 264 to replace the linear slide groove and the slide rail in the prior art, thereby reducing the overall width of the rotating shaft device 22, thereby reducing the internal space occupied by the rotating shaft device 22 in the shell 20, which is beneficial to the layout of other components such as the motherboard or battery.

[0036] The rotating shaft device 22 in this embodiment includes a rotating assembly 25 , a linkage assembly 26 and a limiting mechanism 27 . The rotating assembly 25 , the linkage assembly 26 and the limiting mechanism 27 form an integral structure, which is arranged on the back of the supporting mechanism 23 .

[0037] In some embodiments, the pivot device 22 may also include two rotating components 25, two linkage components 26 and two limiting mechanisms 27. The two rotating components 25 are respectively arranged at the two opposite ends of the back side of the support mechanism 23, the two linkage components 26 are respectively connected to the two rotating components 25, and the two limiting mechanisms 27 are respectively connected to the two linkage components 26.

[0038] In some embodiments, the rotating shaft device 22 may also only include three or more rotating components 25, three or more linkage components 26 and three or more limiting mechanisms 27. The three or more rotating components 25 are arranged on the back side of the supporting mechanism 23 and are arranged at intervals along the length direction of the supporting mechanism 23. The three or more linkage components 26 are respectively connected to the three or more rotating components 25, and the three or more limiting mechanisms 27 are respectively connected to the three or more linkage components 26.

[0039] like Figures 1 to 4 As shown, the rotating mechanisms 253 on the opposite sides of the rotating shaft device 22 are respectively fixedly connected to the two frames 21, specifically, the connecting members 256 of the two rotating mechanisms 253 are respectively fixedly connected to the two frames 21; one of the frames 21 is folded or flattened relative to the other frame 21, which can drive the corresponding rotating mechanism 253 to rotate relative to the positioning seat 251, and the rotating mechanism 253 drives the two side support members 233 to rotate and slide synchronously relative to the positioning seat 251 through the linkage assembly 26, until the two side support members 233 and the middle support member 231 are synchronously bent into a teardrop shape or synchronously unfolded into a horizontal shape, and the bendable area 31 of the flexible member 30 is folded into a teardrop shape or unfolded into a horizontal shape along with the bendable area 31.

[0040] like Figure 3 and Figure 4 As shown, specifically, the frame 21 includes a front face 211, a back face 213, two opposite side faces 214 and two end faces 215, the rotating shaft device 22 is connected between the two end faces 215 of the two frames 21, and the non-bending area 33 of the flexible member 30 is connected to the front face 211 of the frame 21; each frame 21 is provided with a receiving groove 216 on the end face 215 facing the rotating shaft device 22, the receiving groove 216 passes through the front face 211 of the frame 21, and the opposite ends of the receiving groove 216 extend to the two opposite side faces 214 of the frame 21. The opposite sides of the rotating shaft device 22 are respectively accommodated in the receiving grooves 216 of the two frames 21, and each connecting member 256 is fixedly connected to the corresponding frame 21. The back face 213 of the frame 21 is provided with a plurality of receiving spaces (not shown in the figure), and the receiving spaces are used to install electronic devices such as circuit boards and batteries.

[0041] Please also read Figure 5 and Figure 8The middle support member 231 is in the shape of a rectangular plate. The middle support member 231 includes a front side 2311 and a back side 2312 facing away from the front side 2311. Two guide sliders 2313 are respectively provided on opposite sides of one end of the back side 2312 of the middle support member 231. The surface of the guide slider 2313 facing away from the front side 2311 forms an arc guide surface 2314. The middle support member 231 is provided with two mutually spaced avoidance holes 2315 between the two guide sliders 2313. Each arc guide surface 2314 is coplanar with the side surface of the corresponding avoidance hole 2315. The back side 2312 of the middle support member 231 is provided with a plurality of connecting tubes 2316 around the two guide sliders 2313. Each connecting tube 2316 is provided with an internal thread along its axial direction. In this embodiment, the back side 2312 of the middle support member 231 is provided with a connecting tube 2316 at the four corners of the two guide sliders 2313. Two spaced first avoidance openings 2317 are respectively formed on two opposite sides of the middle portion of the middle support member 231 .

[0042] The side support member 233 is in the shape of a rectangular plate. The side of the side support member 233 away from the middle support member 231 is connected to the connecting member 256 through the cooperation of the first arc groove and the first arc rail. The side support member 233 includes a front face 2331 and a back face 2332 facing away from the front face 2331. The side support member 233 is provided with a guide slider 2333. The guide slider 2333 is provided with a first arc groove 2334. The connecting member 256 is provided with a first arc rail 2562 that can be slidably inserted into the first arc groove 2334. The axis of the first arc groove 2334 is colinear with the rotation axis between the side support member 233 and the connecting member 256. The back face 2332 of the side support member 233 away from the middle support member 231 is provided with guide sliders 2333 at opposite ends. Each guide slider 2333 is an arc block. The first arc groove 2334 is provided on the side of the guide slider 2333. One end of the first arc groove 2334 penetrates the surface of the guide slider 2333 away from the middle support member 231, and the other end of the first arc groove 2334 extends to the back side 2332 of the side support member 233. The first arc groove 2334 is bent toward the side away from the back side 2332. Specifically, the middle of the first arc groove 2334 is bent toward the side away from the back side 2332. In this embodiment, the surface of the guide slider 2333 away from the middle support member 231 is coplanar with the side surface of the side support member 233 away from the side support member 231, and the two side surfaces facing the two guide sliders 2333 are respectively provided with the first arc groove 2334, and the axis center lines of the two first arc grooves 2334 are colinear, and one end of the first arc groove 2334 penetrates the surface of the guide slider 2333 away from the middle support member 231. In some embodiments, the two opposite sides of the two guide sliders 2333 are respectively provided with a first arc groove 2334, the axis lines of the two first arc grooves 2334 are collinear, one end of the first arc groove 2334 passes through the surface of the guide slider 2333 away from the middle support member 231, and the first arc groove 2334 is bent toward the side away from the back side 2332, that is, the middle part of the first arc groove 2334 is bent toward the side away from the back side 2332. In other embodiments, the first arc groove 2334 is provided on one of the two opposite sides of one guide slider 2333, and the first arc groove 2334 is provided on one of the two opposite sides of the other guide slider 2333, and the axis lines of the two first arc grooves 2334 are collinear.

[0043] The side of the side support member 233 close to the middle support member 231 is connected to the rotating member 254 through the cooperation of the slide groove and the guide slide column. In this embodiment, the side of the back 2332 of the side support member 233 close to the middle support member 231 is provided with a guide slide block 2335, and the guide slide block 2335 is provided with a slide groove 2336, and the slide groove 2336 runs through the two opposite sides of the guide slide block 2335. The slide groove 2336 extends obliquely to the side away from the middle support member 231, that is, the first end of the slide groove 2336 is close to the back 2332, and the second end opposite to the slide groove 2336 is away from the back 2332, and the slide groove 2336 extends obliquely from the first end to the second end. The side of the side support member 233 close to the middle support member 231 is provided with three second avoidance openings 2337 spaced from each other, and the three second avoidance openings 2337 correspond to the guide slide block 2313 and the two first avoidance openings 2317 on one side of the middle support member 231.

[0044] Please also read Figure 5-Figure 10 The end of the rotating member 254 away from the connecting member 256 is rotatably connected to the positioning seat 251, and the side of the side supporting member 233 away from the middle supporting member 231 is rotatably connected to the connecting member 256; the linkage assembly 26 is connected between the positioning seat 251 and the connecting member 256. The side supporting member 233 and the connecting member 256 are rotatably connected through the cooperation between the first arc groove 2334 and the first arc rail 2562; the positioning seat 251 and the rotating member 254 are rotatably connected through the cooperation between the second arc groove 2511 and the second arc rail 2541. In this embodiment, the connecting member 256 is provided with a first arc rail 2562 corresponding to the first arc groove 2334 of the side support member 233. The first arc rail 2562 can be rotatably inserted in the first arc groove 2334 so that the connecting member 256 and the side support member 233 can rotate relative to each other along the first arc groove 2334. The axis line of the first arc groove 2334 is collinear with the axis line of the first arc rail 2562, and the axis line of the first arc rail 2562 is collinear with the axis line of rotation between the side support member 233 and the connecting member 256. The positioning seat 251 is provided with a second circular arc groove 2511, and the rotating member 254 is provided with a second circular arc rail 2541 corresponding to the second circular arc groove 2511, so that the connecting member 256 and the positioning seat 251 can rotate relative to each other along the second circular arc groove 2511, the axis line of the second circular arc groove 2511 is collinear with the axis line of the second circular arc rail 2541, and the axis line of the second circular arc rail 2541 is collinear with the axis line of rotation between the rotating member 254 and the positioning seat 251.

[0045] Specifically, the positioning seat 251 is a rectangular block, which includes a back side with an arc-shaped cross section and a front side 2510 facing away from the back side. The second arc grooves 2511 are respectively provided on two opposite sides of the middle of the front side 2510 of the positioning seat 251. The opposite side walls of the positioning seat 251 are respectively provided with avoidance grooves 2513, which penetrate the front side 2510 of the positioning seat 251, and the two avoidance grooves 2513 penetrate the two second arc grooves 2511 respectively. The front side of the positioning seat 251 is provided with a plurality of through holes 2514 around the two second arc grooves 2511. In this embodiment, the front side of the positioning seat 251 is respectively provided with through holes 2514 at the four corners of the second arc groove 2511. One end face of the positioning seat 251 is provided with two positioning holes 2516 spaced apart.

[0046] The rotating member 254 includes a second circular arc rail 2541, a connecting portion 2542, and a supporting portion 2543 connected between the second circular arc rail 2541 and the connecting portion 2542. The second circular arc rail 2541 is used to be rotatably connected to the positioning seat 251, and the connecting portion 2542 is used to connect the connecting member 256, the linkage member 264, and the side support member 233. The second circular arc rail 2541 is an arc block, and the back of the arc block is used to slide and fit the inner surface of the second circular arc groove 2511. The end of the connecting portion 2542 away from the second circular arc rail 2541 is provided with an axial hole 2544 in a direction parallel to the axis center line of the second circular arc rail 2541. The connecting portion 2542 is provided with a first extension block 2545 on the side facing the linkage member 264, and the end of the first extension block 2545 away from the side of the connecting portion 2542 away from the axial hole 2544 is provided with a first fixing hole 2546. A second fixing hole 2547 is provided at one end of the connecting portion 2542 which is away from the side of the first extension block 2545 and close to the supporting portion 2543; the second fixing hole 2547 is located between the shaft hole 2544 and the first fixing hole 2546. The rotating member 254 also includes a first guide slide shaft 2540 and a guide slide column 2548. The first guide slide shaft 2540 is fixed to the rotating member 254, and the axis of the first guide slide shaft 2540 is parallel to the axis of the first circular arc groove 2334. In this embodiment, one end of the first guide slide shaft 2540 is fixedly connected to the first fixing hole 2546, and one end of the guide slide column 2548 is fixedly connected to the second fixing hole 2547. In some embodiments, the first guide slide shaft 2540 can also be integrally formed with the rotating member 254. In this embodiment, the supporting portion 2543 is an inclined bar, and the opposite ends of the supporting portion 2543 are respectively connected to one end of the second circular arc rail 2541 and one end of the connecting portion 2542. Preferably, the end surface of the connecting portion 2542 facing away from the second circular arc rail 2541 forms an arc surface.

[0047] In some embodiments, the second arc groove 2511 on the positioning seat 251 and the second arc rail 2541 on the rotating member 254 can be interchangeable; for example: an arc groove can be provided on the second arc rail 2541, and an arc rail corresponding to the arc groove can be provided on the positioning seat 251, and the arc rail can be rotatably inserted in the arc groove, and the axis line of the arc groove, the axis line of the arc rail, and the rotation axis line between the rotating member 254 and the positioning seat 251 are collinear.

[0048] In some embodiments, the positioning seat 251 is provided with an arc groove on the side of the second arc groove 2511, and the side of the second arc rail 2541 of the rotating member 254 is provided with an arc rail corresponding to the arc groove. Specifically, a pair of arc grooves are provided on two opposite sides of the second arc groove 2511, and a pair of arc rails are provided on two opposite sides of the second arc rail 2541 corresponding to the pair of arc grooves. When the second arc rail 2541 is inserted into the second arc groove 2511, the pair of arc rails are respectively inserted into the pair of arc grooves; or an arc groove is provided on one side surface of the second arc groove 2511, and the second arc rail 2541 is provided with an arc rail corresponding to the side of the arc groove. When the second arc rail 2541 is inserted into the second arc groove 2511, the arc rail is inserted into the arc groove.

[0049] The connecting member 256 is in a strip shape, specifically, the connecting member 256 includes a rectangular connecting plate 2560, and first arc rails 2562 are respectively provided at opposite ends of the connecting plate 2560. Support plates 2563 are respectively provided at opposite ends of the surface of the connecting plate 2560 facing the side support member 233, and the first arc rail 2562 is provided at one end of the support plate 2563 away from the connecting plate 2560. In this embodiment, the first arc rails 2562 are respectively provided at two sides of the two support plates 2563 that are away from each other, and the axis center lines of the two first arc rails 2562 are collinear, and the first arc rails 2562 are used to be rotatably inserted into the first arc groove 2334 of the side support member 233.

[0050] In some embodiments, first arc rails 2562 are respectively protruded from two opposite side surfaces of the two support plates 2563 , the axis lines of the two first arc rails 2562 are collinear, and the two first arc rails 2562 are respectively rotatably accommodated in the two first arc grooves 2334 .

[0051] In some embodiments, a first circular arc rail 2562 is provided on one of the two opposite side surfaces of one support plate 2563, and a first circular arc rail 2562 is provided on one of the two opposite side surfaces of the other support plate 2563. The axis lines of the two first circular arc rails 2562 are collinear, and the two first circular arc rails 2562 are rotatably accommodated in the two first circular arc grooves 2334 respectively.

[0052] In some embodiments, the side support member 233 is provided with a first circular arc rail, and the connecting member 256 is provided with a first circular arc groove corresponding to the first circular arc rail; specifically, the first circular arc rail is protruding from the guide sliding block 2333 of the side support member 233, and the first circular arc groove corresponding to the first circular arc rail is provided on the support plate 2563 of the connecting member 256, and the first circular arc rail can be rotatably accommodated in the first circular arc groove.

[0053] The connecting member 256 is provided with a guide slide 2565 near the linkage member 264, and the second arc groove 2561 is provided on the guide slide 2565. Specifically, the guide slide 2565 is provided on one end of the connecting plate 2560 facing the surface of the side support member 233, and two lugs 2566 are provided on the other end. The guide slide 2565 is a guide slide block extending from the connecting plate 2560 to one side of the rotating member 254, and the second arc groove 2561 runs through the two opposite side surfaces of the guide slide block. The second arc groove 2561 includes a first positioning section 2561a away from the positioning seat 251, a second positioning section 2561b close to the positioning seat 251, and a guide slide section 2561c located between the first positioning section 2561a and the second positioning section 2561b; the first positioning section 2561a, the guide slide section 2561c and the second positioning section 2561b are connected to each other. In this embodiment, the guide slide section 2561c of the second arc groove 2561 is bent toward the side close to the side support member 233, that is, the middle part of the guide slide section 2561c of the second arc groove 2561 is bent toward the side close to the side support member 233. The two lugs 2566 form an arc surface away from the end surface of the connecting plate 2560, and a first connection port 2566a is formed between the two lugs 2566. The two lugs 2566 are provided with a connection hole 2566b along the length direction of the connecting plate 2560. A second connection port 2565a is formed between the guide slide portion 2565 and the adjacent lug 2566, and a third connection port 2563a is formed between the guide slide portion 2565 and the adjacent support plate 2563. The connecting member 256 also includes a connecting shaft 2567, and the connecting shaft 2567 is used to be inserted into the connecting hole 2566b.

[0054] Please also read Figure 7-10The linkage assembly 26 also includes a gear assembly 265 and two rotating shafts 266 located between the two linkage members 264, and the two linkage members 264 are rotatably connected to the two rotating shafts 266. The linkage seat 261 is provided with a connecting shaft 2611 in a direction parallel to the rotating shaft 266, and the gear assembly 265 is arranged on the connecting shaft 2611. The end of each linkage member 264 away from the connecting member 256 is provided with a first gear 2645 that meshes with the gear assembly 265. The linkage seat 261 includes a fixing bar 2610 and two connecting shafts 2611 spaced from each other arranged on the fixing bar 2610. The fixing bar 2610 includes a first fixing block 2612 located in the middle thereof and two second fixing blocks 2613 located at opposite ends of the first fixing block 2612, and the end surface of the second fixing block 2613 facing away from the first fixing block 2612 is set as an arc surface. The first fixing block 2612 is provided with two spaced connection holes along the length direction perpendicular to the fixing strip 2610, and the middle parts of the two connection shafts 2611 are respectively fixedly inserted into the two connection holes of the first fixing block 2612. The middle part of the second fixing block 2613 is provided with an axis hole 2615 along the axis direction parallel to the axis center line of the connection shaft 2611.

[0055] The linkage member 264 includes a first sleeve 2642 and a connecting rod 2643 connected to the outer peripheral wall of the first sleeve 2642. The outer peripheral wall of the first sleeve 2642 is provided with a first gear 2645 meshing with the gear assembly 265. The connecting rod 2643 is used to connect the rotating member 254 and the connecting member 256. In this embodiment, the rotation angle range of the teeth of the first gear 2645 arranged along the circumference of the first sleeve 2642 is greater than 90 degrees and less than 180 degrees, that is, the first gear 2645 is provided on the outer peripheral wall of the first sleeve 2642 greater than one quarter and less than one half. The second guide slide shaft 2641 is fixed to the linkage member 264. In this embodiment, the end of the connecting rod 2643 away from the first sleeve 2642 is provided with a fixing hole 2646 in a direction parallel to the axis center line of the first gear 2645, and one end of the second guide slide shaft 2641 is fixed in the fixing hole 2646. The first arc groove 2640 is provided on the side of the linkage member 264 facing the rotating member 254; in this embodiment, the side of the connecting rod 2643 facing the rotating member 254 is provided with a second extension block 2647, and the side of the second extension block 2647 facing away from the connecting rod 2643 is provided with the first arc groove 2640. The first arc groove 2640 includes a first positioning section 2640a close to the first sleeve 2642, a second positioning section 2640b away from the first sleeve 2642, and a guide slide section 2640c located between the first positioning section 2640a and the second positioning section 2640b; the first positioning section 2640a, the guide slide section 2640c and the second positioning section 2640b are connected to each other. In this embodiment, the guide slide section 2640 c of the first arcuate groove 2640 is bent toward the side away from the side support member 233 , that is, the middle portion of the guide slide section 2640 c of the first arcuate groove 2640 is bent toward the side away from the side support member 233 .

[0056] Each linkage member 264 is connected to a push member 271. Specifically, the push member 271 is a sleeve connected to the end of the first sleeve 2642 away from the linkage seat 261. The push member 271 includes a first cam 2710, which is arranged on the end surface of the sleeve away from the linkage seat 261. The first cam 2710 is sleeved on the rotating shaft 266, and the axis of the first cam 2710 is coaxial with the first sleeve 2642, and the axis of the first gear 2645 is colinear with the axis of the first sleeve 2642. The first cam 2710 includes a concave-convex surface provided at one end of the sleeve, and the concave-convex surface includes a first protruding portion 2712 and a first concave portion 2714, and the first protruding portion 2712 and the first concave portion 2714 are arranged in sequence along the circumference of the sleeve. The number of the first protrusions 2714 and the number of the first recesses 2715 can be set as needed, such as the first cam 2710 can include one first protrusion 2714 and one first recess 2715, two first protrusions 2714 and two first recesses 2715, three first protrusions 2714 and three first recesses 2715, or four first protrusions 2714 and four first recesses 2715. In this embodiment, the first cam 2710 includes three first protrusions 2712 and three first recesses 2714 arranged at intervals along the circumference of the sleeve.

[0057] The gear combination 265 includes two second gears 2652 that mesh with each other. The first gears 2645 of the two linkage members 264 are respectively meshed with the two second gears 2652. The diameter of the pitch circle of the second gear 2652 is smaller than the diameter of the pitch circle of the first gear 2645, and the number of teeth arranged in a circle of the second gear 2652 is less than the number of teeth arranged in a circle of the first gear 2645.

[0058] In this embodiment, the linkage assembly 26 further includes two pairs of linkage members and two gear assemblies 265, and a gear assembly 265 is provided between each pair of linkage members; the two pairs of linkage members are respectively arranged on opposite sides of the linkage seat 261. It should be noted that: one pair of linkage members 264 and the corresponding gear assembly 265 and another pair of linkage members 264a and the corresponding gear assembly 265 are respectively arranged on opposite sides of the linkage seat 261, wherein the structure of the linkage member 264a is similar to that of the linkage member 264, except that the linkage member 264a omits the second extension block 2647 and the first arc groove 2640 on the basis of the linkage member 264.

[0059] In some embodiments, the linkage assembly 26 may also only include a pair of linkage members 264 and a gear assembly 265 disposed between the pair of linkage members 264 .

[0060] like Fig. 9 and Fig.10As shown, the rotating shaft 266 includes a shaft body 2660 and a positioning cover 2662 located at one end of the shaft body 2660. The end of the shaft body 2660 away from the positioning cover 2662 is provided with a clamping groove 2663. The clamping groove 2663 is located on the outer peripheral wall of the shaft body 2660 and is arranged in a circle along the circumference of the shaft body 2660.

[0061] Please also read Figure 5-Figure 10 The limiting mechanism 27 includes a push member 271, a holding member 273 and an elastic member 274 arranged on the linkage members 264 and 264a. The elastic member 274 provides an elastic force for the holding member 273 and the push member 271 to abut against each other. The rotating mechanism 253 rotates relative to the positioning seat 251 through the linkage mechanism 26, and the push member 271 rotates relative to the holding member 273. The elastic member 274 is elastically squeezed and elastically deformed. The friction resistance between the push member 271 and the holding member 273 positions the linkage members 264 and 264a relative to the linkage seat 261, so as to realize that the side support member 233 is positioned at a specific angle relative to the middle support member 231. The range of the specific angle is that the angle between the two side support members 233 is 70 degrees to 130 degrees. Specifically, when the two side support members 233 of the rotating shaft device 22 are synchronously unfolded or synchronously folded to a degree equal to or greater than 70 degrees and less than or equal to 130 degrees through the rotating assembly 25 and the linkage assembly 26, the friction between the push member 271 and the support member 273 positions the two side support members 233, that is, the two side support members 233 do not rotate relative to each other in the absence of external force. Specifically, the support member 273 includes a second cam 2730, the first cam 2710 and the second cam 2730 can rotatably support each other, and the elastic member 274 elastically pushes the support member 273. When the first cam 2710 rotates relative to the second cam 2730, the first cam 2710 rotationally pushes the second cam 2730 to slide away from or close to the linkage seat 261, the elastic member 274 is squeezed, and the friction resistance between the first cam 2710 and the second cam 2730 can limit the pushing member 271 to a specific angle relative to the supporting member 273.

[0062] In the present application, under a certain width and height space between the two rotating shafts 266, the diameter of the pitch circle of the first gear 2645 is increased by two second gears 2652 disposed between the two rotating shafts 266, thereby increasing the outer diameter of the first cam 2710, so that a larger friction torque can be provided between the first cam 2710 and the second cam 2730, and fatigue wear of the first cam 2710 can be reduced, thereby extending the service life of the first cam 2710. A shaft hole 2654 is provided in the middle of the second gear 2652 along its axial direction.

[0063] In this embodiment, the resisting member 273 includes a connecting portion 2732 and two second cams 2730 disposed at opposite ends of the connecting portion 2732, that is, the two second cams 2730 are located at opposite ends of the connecting portion 2732, and the two second cams 2730 are respectively slidably sleeved on the two rotating shafts 266. The ends of the two linkage members 264 away from the first cam 2710 are respectively connected to the two connecting members 256 and the two rotating members 254, and the ends of the two linkage members 264a away from the first cam 2710 are respectively connected to the two connecting members 256; the linkage members 264 and 264a rotate along the rotating shaft 266 relative to the linkage seat 261 with the connecting member 256 and the rotating member 254 to drive the first cam 2710 to rotate relative to the second cam 2730, and the resisting member 273 can slide along the axial direction of the rotating shaft 266. Specifically, the second cam 2730 includes a circular sleeve and a concave-convex surface provided at one end of the sleeve, the concave-convex surface includes a second protruding portion 2734 and a second concave portion 2735, the second protruding portion 2734 and the second concave portion 2735 are sequentially arranged at intervals along the circumference of the sleeve; the number of the second protruding portions 2734 and the number of the second concave portions 2735 on the second cam 2730 is consistent with the number of the first concave portions 2715 and the number of the first protruding portions 2714 on the first cam 2710, so that the first protruding portion 2714 cooperates with the second concave portion 2735, and the second protruding portion 2734 cooperates with the first concave portion 2715. The connecting portion 2732 is provided with two guide sliding holes 2737 spaced apart along the axial direction of the sleeve of the second cam 2730.

[0064] In this embodiment, the limiting mechanism 27 includes two abutting members 273 and two elastic members 274, wherein the two second cams 2730 of one abutting member 273 respectively cooperate with the first cams 2710 on the two linkage members 264, and the two second cams 2730 of the other abutting member 273 respectively cooperate with the first cams 2710 on the two linkage members 264. The elastic member 2731 is a spring sleeved on the rotating shaft 266.

[0065] like Fig. 9 and Fig.10 As shown, the limiting mechanism 27 also includes a positioning member 275 and a gasket 277 disposed at one end of the rotating shaft 266 away from the push member 271. The positioning member 275 is used to position the elastic member 2731 on the rotating shaft 266. The gasket 277 is sleeved on the rotating shaft 266 and is located between the positioning member 275 and the elastic member 2731. The positioning member 275 includes a positioning piece 2751 and two buckles 2755 disposed at opposite ends of the positioning member 2751. The opposite end surfaces of the positioning piece 2751 are formed as arc surfaces, and the buckles 2755 are C-shaped snap rings. The opposite end surfaces of the gasket 277 are formed as arc surfaces, and the opposite ends of the gasket 277 are respectively provided with through holes 2772.

[0066] like Figure 3-Figure 6As shown, the rotating shaft device 22 also includes a back cover 28, and the positioning seat 251 and the linkage seat 261 are connected to the back cover 28. Specifically, the back cover 28 is a bar frame, and the back cover 28 has a receiving groove 280. The positioning seat 251 and the linkage seat 261 are accommodated in the receiving groove 280 and fixedly connected to the back cover 28. Preferably, the back cover 28 is provided with a first mounting portion (not shown in the figure) and a second mounting portion (not shown in the figure) on the inner surface of the receiving groove 280, and the positioning seat 251 is connected to the first mounting portion, and the linkage seat 261 is connected to the second mounting portion. The connection between the positioning seat 251 and the first mounting portion and the connection between the linkage seat 261 and the second mounting portion can be by, but not limited to, screw connection, clamping connection or adhesive connection.

[0067] Please also read Figure 3-Figure 18 When assembling the rotating shaft device, the ends of the connecting parts 2542 of the two rotating members 254 away from the second arc rail 2541 are respectively accommodated in the first connecting openings 2566a of the two connecting members 256, so that the shaft hole 2544 of each rotating member 254 is aligned with the corresponding connecting hole 2566b, and the first extending block 2545 of each rotating member 254 is close to the guide slide part 2565 of the connecting member 256; the connecting shaft 2567 is inserted into the shaft hole 2544 and the connecting hole 2566b. In 566b, the rotating member 254 is rotatably connected to the connecting member 256 along the connecting shaft 2567; one end of the two first guide sliding shafts 2540 are respectively inserted into the first fixing holes 2546 of the two rotating members 254, so that the other end of the first guide sliding shafts 2540 protrudes from the rotating member 254; one end of the two guide sliding columns 2548 are respectively inserted into the second fixing holes 2547 of the two rotating members 254, so that the other end of the guide sliding column 2548 protrudes from the rotating member 254.

[0068] The two gear assemblies 265 are respectively assembled on the opposite sides of the linkage seat 261. Specifically, the two gear assemblies 265 are respectively placed on the opposite sides of the linkage seat 261, and the second gear 2652 of each gear assembly 265 is sleeved on the connecting shaft 2611, that is, each connecting shaft 2611 is inserted into the shaft hole 2654 of the corresponding second gear 2652; a pair of linkage members 264 are placed on the opposite sides of one of the gear assemblies 265, and the first gear 2645 of the linkage member 264 is meshed with the second gear 2652; another pair of linkage members 264a are placed on the opposite sides of the other gear assembly 265, and the first gear 2645 of the linkage member 264a is meshed with the second gear 2652; at this time, the inner cavity of each first sleeve 2642 is aligned with the corresponding shaft hole 2615. The two supporting members 273 are respectively matched with two pairs of linkage members. Specifically, the two second cams 2730 of one of the supporting members 273 are respectively matched with the first cams 2710 of a pair of linkage members 264, and the two second cams 2730 of the other supporting member 273 are respectively matched with the first cams 2710 of another pair of linkage members 264a. At this time, the first protrusion 2714 is accommodated in the second recessed portion 2735, the second protrusion 2734 is accommodated in the first recessed portion 2715, and the connecting shaft 2611 is inserted into the corresponding guide sliding hole 2737. The ends of the two rotating shafts 266 away from the positioning cover 2662 are respectively inserted into the sleeves of the two second cams 2730 of the abutting member 273 that cooperates with the pair of linkage members 264, so that the rotating shaft 266 passes through the first sleeve 2642 of the linkage member 264, the shaft hole 2615 of the linkage seat 261, the first sleeve 2642 of the linkage member 264a, and the sleeve of the second cam 2730 of the other abutting member 273 in sequence until the abutting member 273 stops at the positioning cover 2662 of the rotating shaft 266. The two elastic members 274 are respectively sleeved on the ends of the two rotating shafts 266 away from the positioning cover 2662; the gaskets 277 are sleeved on the ends of the two rotating shafts 266 away from the positioning cover 2662, that is, the ends of the two rotating shafts 266 away from the positioning cover 2662 are respectively inserted into the two through holes 2772 of the gasket 277. The two buckles 2755 are respectively clamped on the clamping grooves 2663 of the two rotating shafts 266. At this time, the two buckles 2755 respectively press against the gasket 277, the supporting member 273 and the elastic member 274 are sleeved on the rotating shaft 266, the supporting member 273 is located between the pushing member 271 and the elastic member 274, and one end of the elastic member 274 away from the supporting member 273 elastically presses against the positioning member 275, and the elastic member 274 is in a squeezed state, that is, the elastic member 274 has a pre-elastic force. If the elastic member 2731 has a pre-elastic force F0, each first cam 2710 can be rotatably pressed against the corresponding second cam 2730, and the axial force F on the first cam 2710 and the second cam 2720 on each rotating shaft 266 is equal to the pre-elastic force F0 of the elastic member 274, that is, F=F0.

[0069] The second arc rails 2541 of the two rotating mechanisms 253 are respectively placed in the two second arc grooves 2511 of the positioning seat 251, and the linkage assembly 26 is placed between the two connecting members 256 of the rotating assembly 25. The end of the rotating shaft 266 away from the elastic member 274 is connected to the positioning seat 251, that is, the positioning covers 2662 of the two rotating shafts 266 of the linkage assembly 26 are respectively inserted into the two positioning holes 2516 of the positioning seat 251, and the ends of the two first guide slide shafts 2540 away from the rotating member 254 are respectively inserted into the first arc grooves 266 of the pair of linkage members 264. 40; the ends of the connecting rods 2643 of a pair of linkage members 264 away from the first sleeve 2642 are respectively accommodated in the second connecting ports 2565a of the two connecting members 256, and the ends of the connecting rods 2643 of another pair of linkage members 264a away from the first sleeve 2642 are respectively accommodated in the third connecting ports 2563a of the two connecting members 256; the two second guide slide shafts 2641 are respectively inserted into the second arc grooves 2561 of the two connecting members 256, and the opposite ends of the second guide slide shafts 2641 are respectively inserted into the fixing holes 2646 of the two connecting rods 2643. The middle support member 231 is covered on the positioning seat 251 and the linkage seat 261, so that the inner cavities of the four connecting tubes 2316 of the middle support member 231 are respectively opposite to the through holes 2514 of the positioning seat 251, and the four screws are respectively passed through the through holes 2514 and locked in the corresponding internal threads of the connecting tubes 2316. At this time, the end of the rotating member 254 away from the connecting member 256 is arranged between the middle support member 231 and the positioning seat 251, that is, the two second circular arc rails 2541 are clamped by the positioning seat 251 and the middle support member 231, and one of the circular arc surfaces of the second circular arc rail 2541 can be rotatably fitted on the inner surface of the second circular arc groove 2511, and the second circular arc rail 2541 can rotate relative to the positioning seat 251 through the second circular arc rail 2541; the two pairs of linkage members 264 are respectively opposite to the first avoidance opening 2317 of the middle support member 231. Then place the two side support members 233 on the opposite sides of the middle support member 231, and the two first arc rails 2562 of each connecting member 256 are respectively inserted into the two first arc grooves 2334 of the corresponding side support member 233, and the first guide slide shaft 2540 of the rotating member 254 is slidably inserted into the slide groove 2336 of the side support member 233, and the three second avoidance openings 2337 of the side support member 233 are respectively opposite to the rotating member 254, the linkage member 264 and the linkage member 264a. When the side support member 233 and the middle support member 231 are in a flattened state, the side support member 233 and the middle support member 231 are arranged side by side, the first circular arc rail 2562 is rotatably accommodated in the corresponding first circular arc groove 2334, the guide slide column 2548 is located at the second end of the slide groove 2336, the first guide slide shaft 2540 is located at the first positioning section 2640a of the first arc groove 2640, and the second guide slide shaft 2641 is located at the first positioning section 2561a of the second arc groove 2561.

[0070] At this time, the first arc groove 2640 bends toward the side away from the side support member 233, that is, the guide sliding section 2640c of the first arc groove 2640 bends toward the side away from the side support member 233; the second arc groove 2561 bends toward the side close to the side support member 233, that is, the guide sliding section 2561c of the second arc groove 2561 bends toward the side away from the side support member 233; the first arc groove 2640 is closer to the side support member 233 than the second arc groove 2561. The rotation axis line between the rotating member 254 and the positioning seat 251 is parallel to the rotation axis line between the side support member 233 and the connecting member 256; the rotation axis line between the rotating member 254 and the positioning seat 251 is parallel to the rotation axis line between the linkage member 264 and the linkage seat 261; the rotation axis line between the rotating member 254 and the positioning seat 251 is parallel to the axis line of the rotating shaft 266, and the rotation axis line between the rotating member 254 and the positioning seat 251 is closer to the supporting mechanism 23 than the axis line of the rotating shaft 266; the axis line of the first guide sliding shaft 2540, the axis line of the guide sliding column 2548, the axis line of the connecting shaft 2567, the axis line of the second guide sliding shaft 2641 and the axis line of the rotating shaft 266 are parallel to each other.

[0071] When the connecting member 256 drives the rotating member 254 to rotate relative to the positioning seat 251, the linkage members 264, 264a rotate relative to the linkage seat 261, and the rotating mechanism 253 drives the side support member 233 to rotate and slide relative to the positioning seat 251, so that the side support member 233 and the middle support member 231 are synchronously bent or synchronously unfolded. Specifically, the rotating member 254 rotates relative to the positioning seat 251 through the second circular arc rail 2541 and the second circular arc groove 2511; the linkage member 264 rotates along the corresponding rotating shaft 266 with the rotating mechanism 253, so that the first gear 2645 of the linkage member 264, 264a is rotationally engaged with the corresponding second gear 2652, thereby realizing the synchronous rotation of the two pairs of linkage members of the limiting mechanism 27, the first guide slide shaft 2540 slides and rotates in the first arc groove 2640, and the second guide slide shaft 2641 slides and rotates in the second arc groove 2561; the first circular arc rail 2562 of the connecting member 256 is rotationally connected to the corresponding first circular arc groove 2334, and the guide slide column 2548 slides and rotates in the slide groove 2336, thereby realizing the mutual bending or mutual unfolding of the side support member 233 and the middle support member 231.

[0072] like Figure 19-Figure 32When the rotating shaft device 22 is bent from a flat state, one of the connecting members 256 is bent toward the other connecting member 256 relative to the positioning seat 251, and one of the connecting members 256 drives the second arc rail 2541 of the rotating member 254 to rotate in the second arc groove 2511 of the positioning seat 251, and the first guide slide shaft 2540 on the rotating member 254 slides and rotates in the corresponding first arc groove 2640, and the first guide slide shaft 2540 moves from the first positioning section 2640a to the second positioning section 2640b, and the second guide slide shaft 2641 on the linkage member 264 rotates and slides in the corresponding second arc groove 2561, and the second guide slide shaft 2641 moves from the first positioning section 2561a to the second positioning section 2561b, so as to drive the corresponding linkage members 264, 264a to rotate along the rotating shaft 266. The rotation of the linkage members 264, 264a drives the corresponding first gear 2645 to rotate, and the corresponding two first gears 2645 are driven to rotate synchronously through the gear combination 265, and the synchronously rotating first gear 2645 drives the corresponding two linkage members 264 to move synchronously closer to each other; at the same time, the connecting member 256 drives the first arc rail 2562 to be rotationally connected to the corresponding first arc groove 2334, and the guide slide column 2548 on the rotating member 254 slides from the second end to the first end in the corresponding slide groove 2336; at the same time, the linkage members on the opposite sides of the linkage seat 261 rotate synchronously relative to the linkage seat 261 and move closer to each other, so as to drive the two side support members 233 to move synchronously closer to each other, until the two side support members 233 and the middle support member 231 form a water drop-shaped cross section.

[0073] During the above process, when the side support member 233 is bent relative to the middle support member 231, the first guide slide shaft 2540 slides from the end of the first arc groove 2640 close to the middle support member 231 (i.e., the first positioning section 2640a of the first guide slide shaft 2540) to the end away from the middle support member 231 (i.e., the second positioning section 2640b of the first guide slide shaft 2540), and the second guide slide shaft 2641 slides from the end of the second arc groove 2561 away from the middle support member 231 (i.e., the first positioning section 2561a of the second guide slide shaft 2641) to the end close to the middle support member 231 (i.e., the second positioning section 2561b of the second guide slide shaft 2641). The guide slide column 2548 slides from the end of the slide groove 2336 away from the middle support member 231 (i.e., the second end of the slide groove) to the end close to the middle support member 231 (i.e., the first end of the slide groove). The axial force between the first cam 2710 and the corresponding second cam 2730 on each rotating shaft 266 is equal to the elastic force of the elastic member 274; the friction resistance between the first cam 2710 and the second cam 2730 can limit the two side support members 233 to a specific angle between 70 degrees and 130 degrees.

[0074] In other usage modes, the two connecting members 256 can be rotated together in opposite directions, and each connecting member 256 rotates relative to the second arc groove 2511 corresponding to the positioning seat 251 through the corresponding second arc rail 2541 of the rotating member 254, so as to drive the linkage members 264, 264a of the limiting mechanism 27 to rotate along the corresponding rotating shaft 266; at the same time, the two connecting members 256 synchronously drive the first arc rail 2562 to be rotatably connected to the first arc groove 2334 corresponding to the side support member 233, the guide slide column 2548 on the rotating member 254 slides and rotates in the corresponding slide groove 2336 of the side support member 233, and the first guide slide shaft 2540 on the rotating member 254 slides and rotates in the corresponding first arc groove 2640, so that the first guide slide shaft 2540 moves from the first positioning section 2640 to the first arc groove 2640. a moves to the second positioning section 2640b; the rotation of the linkage member 264 drives the corresponding first gear 2645 to rotate, and the corresponding two first gears 2645 are driven to rotate synchronously through the gear combination 265. The synchronously rotating first gear 2645 drives the corresponding linkage members 264 and 264a to move closer to each other synchronously, and the second guide slide shaft 2641 on the linkage member 264 rotates and slides in the corresponding second arc groove 2561, and the second guide slide shaft 2641 moves from the first positioning section 2561a to the second positioning section 2561b; at the same time, the rotating mechanisms 253 on the opposite sides of the limiting mechanism 27 rotate synchronously relative to the positioning seat 251 and move closer to each other, so as to drive the two side support members 233 to move closer to each other synchronously, until the two side support members 233 and the middle support member 231 form a water drop-shaped cross section.

[0075] When the rotating shaft device 22 is unfolded from a completely bent state, one of the connecting members 256 is unfolded relative to the positioning seat 251 toward away from the other connecting member 256, and one of the connecting members 256 drives the second arc rail 2541 of the rotating member 254 to rotate in the second arc groove 2511 of the positioning seat 251, and the first guide slide shaft 2540 of the rotating member 254 slides and rotates in the corresponding first arc groove 2640, and the first guide slide shaft 2540 moves from the second positioning section 2640b to the first positioning section 2640a; the second guide slide shaft 2641 on the linkage member 264 rotates and slides in the corresponding second arc groove 2561, and the second guide slide shaft 2641 moves from the second positioning section 2561b to the first positioning section 2561a, so as to drive the corresponding linkage members 264, 264a to rotate along the rotating shaft 266. At the same time, the connecting member 256 drives the first arc rail 2562 to be rotatably connected to the corresponding first arc groove 2334, and the guide slide column 2548 on the rotating member 254 slides from the first end and rotates to the second end in the corresponding slide groove 2336; the rotation of the linkage members 264, 264a drives the corresponding first gear 2645 to rotate, and the corresponding two first gears 2645 are driven to rotate synchronously through the gear combination 265, and the synchronously rotating first gears 2645 drive the corresponding two linkage members 264 to move away from each other synchronously; at the same time, the rotating mechanisms 253 on the opposite sides of the limiting mechanism 27 rotate synchronously relative to the positioning seat 251 and move away from each other, so as to drive the two side support members 233 to expand synchronously with each other until the two side support members 233 and the middle support member 231 are flattened.

[0076] In the above process, when the side support member 233 is flattened relative to the middle support member 231, the first guide slide shaft 2540 slides from one end of the first arc groove 2640 away from the middle support member 231 (that is, the second positioning section 2640b of the first guide slide shaft 2540) to one end close to the middle support member 231 (that is, the first positioning section 2640a of the first guide slide shaft 2540), and the second guide slide shaft 2641 slides from one end of the second arc groove 2561 close to the middle support member 231 (the second positioning section 2561b of the second guide slide shaft 2641) to one end away from the middle support member 231 (that is, the first positioning section 2561a of the second guide slide shaft 2641); the guide slide column 2548 slides from one end of the slide groove 2336 close to the middle support member 231 (that is, the first end of the slide groove) to one end away from the middle support member 231 (that is, the second end of the slide groove). The axial force on the first cam 2710 and the second cam 2730 on each rotating shaft 266 is equal to the elastic force of the elastic member 274; the friction resistance between the first cam 2710 and the second cam 2730 can limit the two side support members 233 to a specific angle between 130 degrees and 70 degrees.

[0077] In other usage modes, the two connecting members 256 can be rotated together in the direction away from each other, and each connecting member 256 drives the second arc track 2541 of the rotating member 254 to rotate relatively along the second arc groove 2511 of the positioning seat 251, and the first guide slide shaft 2540 of the rotating member 254 slides and rotates in the corresponding first arc groove 2640, and the first guide slide shaft 2540 moves from the second positioning section 2640b to the first positioning section 2640a; the second guide slide shaft 2641 on the linkage member 264 rotates and slides in the corresponding second arc groove 2561, and the second guide slide shaft 2641 moves from the second positioning section 2561b to the first positioning section 2561a, so as to drive the corresponding linkage members 264, 264a to rotate along the rotating shaft 266; When the first arc rail 2562 is connected to the corresponding first arc groove 2334, the connecting member 256 drives the first arc rail 2562 to be rotatably connected to the corresponding first arc groove 2334, and the guide slide column 2548 on the rotating member 254 slides from the first end and rotates to the second end in the corresponding slide groove 2336; the rotation of the linkage members 264 and 264a drives the corresponding first gear 2645 to rotate, and the corresponding two first gears 2645 are driven to rotate synchronously through the gear combination 265, and the synchronously rotating first gears 2645 drive the corresponding linkage members 264 to move away from each other synchronously; at the same time, the rotating mechanisms 253 on the opposite sides of the limiting mechanism 27 rotate synchronously relative to the positioning seat 251 and move away from each other, so as to drive the two side support members 233 to move away from each other synchronously until the two side support members 233 are flush with the middle support member 231.

[0078] In some embodiments, the first guide slide shaft 2540 on the rotating member 254 and the first arc groove 2640 on the linkage member 264 can be interchangeable, that is, the first arc groove 2640 can be provided on the side of the rotating member 254 facing the linkage member 264, the first guide slide shaft 2540 can be fixed to the linkage member 264, and the first guide slide shaft 2540 is slidably and rotatably inserted in the first arc groove 2640. Specifically, a first arc groove is provided on the side of the connecting member 256 facing the linkage member 264, and a first guide slide shaft that can be movably inserted in the first arc groove is provided on the linkage member 264. In the process of bending or unfolding the rotating shaft device 22, the first guide slide shaft slides and rotates in the first arc groove.

[0079] In some embodiments, the second guide slide shaft 2641 on the linkage member 264 and the second arc groove 2561 on the connecting member 256 can be interchangeable, that is, the second arc groove 2561 can be provided on the linkage member 264, the second guide slide shaft 2641 can be fixed to the guide slide portion 2565, and the second guide slide shaft 2641 is slidably and rotatably inserted in the second arc groove 2561. Specifically, a second arc groove is provided on the side of the linkage member 264 facing the guide slide portion 2565, and a second guide slide shaft that can be movably inserted in the second arc groove is provided on the connecting member 256. In the process of bending or unfolding the rotating shaft device 20, the second guide slide shaft slides and rotates in the second arc groove.

[0080] In some embodiments, the guide slide column 2548 on the rotating member 254 and the slide groove 2336 on the side support member 233 can be interchangeable. Specifically, a slide groove is provided on the side of the connecting portion 2542 of the rotating member 254 facing the guide sliding block 2335, and a guide slide column that can be movably inserted in the slide groove is provided on the side support member 233. During the bending or unfolding of the rotating shaft device 20, the guide slide column slides and rotates in the slide groove.

[0081] Please also read Figure 1-Figure 4 , place the installed rotating shaft device 22 between the two frames 21, place the connecting pieces 256 on opposite sides of the back cover 28 in the receiving grooves 216 of the two frames 21, and fix the two connecting pieces 256 to the two frames 21. At this time, the front faces 211 of the two frames 21, the front faces of the two side support pieces 233, and the front face 2311 of the middle support piece 231 are coplanar. The back face of the flexible piece 30 is connected to the front faces 2331 of the two frames 21 and the front face 2311 of the support mechanism 23, the bendable area 31 faces the support mechanism 23, and the two non-bending areas 33 face the front faces of the two frames 21 respectively. When the flexible member 30 is in a flattened state, the middle support member 231 is flush with the two side support members 233, and the first cam 2710 and the second cam 2730 are fitted together to limit the support mechanism 23 to maintain a flattened state; since the front of the support mechanism 23 is a complete surface, the flexible member 30 will not be impacted by the step difference when flattened, and the flexible member 30 will not have color spots, bright spots and other undesirable problems, thereby ensuring the reliability of the flexible member 30. At the same time, the touch feel of the flexible member 30 is also improved, and the user experience is improved; in addition, the rotating member 254 and the linkage member 264 are connected by the first arc groove and the first guide shaft, and the linkage member 264 and the connecting member 256 are connected by the second arc groove and the second guide shaft. The bending direction of the first arc groove is opposite to the bending direction of the second arc groove. Therefore, the connection between the components in the rotating shaft device 22 can be made more compact, thereby reducing the overall width of the rotating shaft device 22, reducing the internal space occupied by the shell 20, and facilitating the layout of other components such as the motherboard or battery.

[0082] Please also read Figure 29-Figure 35 When the electronic device 100 is bent, a bending force is applied to at least one of the two frames 21 of the electronic device 100, so that the rotating mechanism 253 connected to the two frames 21 rotates in a direction close to each other, and the bending of the hinge device 22 is achieved through the linkage assembly 26, and the bendable area 31 of the flexible member 30 is bent along with the supporting mechanism 23. Specifically, if a bending force is applied to one of the frames 21, the one of the frames 21 drives the corresponding rotating member 254 to rotate relative to the positioning seat 251 toward the side close to the flexible member 30, and the second circular arc track 2541 of the rotating member 254 rotates relative to the second circular arc groove 2511 of the positioning seat 251, and the first guide slide shaft 2540 slides and rotates in the corresponding first arc groove 2640, and the first guide slide shaft 2540 moves from the first positioning section 2640a to the second positioning section 2640b, and the second guide slide shaft 2641 It rotates and slides in the corresponding second arc groove 2561, and the second guide shaft 2641 moves from the first positioning section 2561a to the second positioning section 2561b to drive the corresponding linkage members 264, 264a to rotate along the rotating shaft 266. The rotation of the linkage members 264, 264a drives the corresponding first gear 2645 to rotate, and the corresponding two first gears 2645 are driven to rotate synchronously through the gear combination 265. The synchronously rotating first gear 2645 drives the corresponding two linkage members 264 to move synchronously closer to each other. At the same time, the connecting member 256 drives the first arc rail 2562 to be rotatably connected to the corresponding first arc groove 2334, and the guide slide column 2548 slides and rotates from the second end to the first end in the corresponding slide groove 2336; at the same time, the rotating mechanisms 253 on both sides of the limiting mechanism 27 rotate synchronously relative to the positioning seat 251 and move closer to each other, so as to drive the two side support members 233 to move closer to each other synchronously, so that the hinge device 22 is in a bent state; the bendable area 31 of the flexible member 30 bends with the hinge device 22 until the front sides of the two non-bending areas 33 of the flexible member 30 fit each other, and the bendable area 31 bends into a water drop shape, thereby realizing seamless folding of the electronic device 100.

[0083] In the above process, the friction torque between the first cam 2710 and the second cam 2730 on each rotating shaft 266 is greater than the rebound force of the flexible member 30, so that the two side support members 233 are relatively positioned at a specific angle, and the two frames 21 can be limited to a specific angle between 70 degrees and 130 degrees. The bendable area 31 of the flexible member 30 is bent into a water drop shape, reducing the duty cycle of the bendable area 31 after bending, thereby reducing the overall thickness of the electronic device 100.

[0084] In other bending methods of the electronic device 100 , a bending force may be applied to the two frames 21 at the same time. The two frames 21 respectively drive the two rotating mechanisms 253 to rotate toward the side close to the flexible member 30 , and the electronic device 100 is bent through the rotating shaft device 22 .

[0085] When the electronic device 100 needs to be flattened, one of the frames 21 is pulled outward, so that the two rotating mechanisms 253 connected to the two frames 21 rotate in directions away from each other. Specifically, a force is applied to one of the frames 21 of the electronic device 100 to pull it outward, and the one of the frames 21 drives the corresponding rotating member 254 to rotate relative to the positioning seat 251 toward the side away from the flexible member 30, and the second circular arc track 2541 of the rotating member 254 rotates relatively along the second circular arc groove 2511 of the positioning seat 251, and the first guide slide shaft 2540 of the rotating member 254 slides and rotates in the corresponding first arc groove 2640, and the first guide slide shaft 2540 moves from the second positioning section 2640b to the first positioning section 2640a; the second guide slide shaft 2641 on the linkage member 264 rotates and slides in the corresponding second arc groove 2561, and the second guide slide shaft 2641 moves from the second positioning section 2561b to the first positioning section 2561a; so as to drive the corresponding linkage members 264264, 264a to rotate along the rotation axis 2 66 rotates; at the same time, the connecting member 256 drives the first arc rail 2562 to be rotatably connected to the corresponding first arc groove 2334, and the guide slide column 2548 on the rotating member 254 slides from the first end and rotates to the second end in the corresponding slide groove 2336; the rotation of the linkage member 264 drives the corresponding first gear 2645 to rotate, and the corresponding two first gears 2645 are driven to rotate synchronously through the gear combination 265, and the synchronously rotating first gears 2645 drive the corresponding two linkage members 264 to move away from each other synchronously; at the same time, the rotating mechanisms 253 on the opposite sides of the limiting mechanism 27 rotate synchronously relative to the positioning seat 251 and move away from each other, so as to drive the two side support members 233 to move away from each other synchronously and flatten, so that the shaft device 22 is unfolded, and the bendable area 31 of the flexible member 30 is unfolded with the shaft device 22 until the flexible member 30 is flattened.

[0086] In the above process, the sum of the friction torques between the first cam 2710 and the second cam 2730 on each rotating shaft 266 is greater than the rebound force of the flexible member 30, so that the two side support members 233 are relatively positioned at a specific angle, and the two frames 21 can be limited to a specific angle between 130 degrees and 70 degrees.

[0087] In other bending methods of the electronic device 100 , a force pulling outward can be applied to the two frames 21 at the same time, and the two frames 21 respectively drive the two rotating mechanisms 253 to rotate relative to the side away from the flexible member 30 , and the electronic device 100 can be unfolded through the rotating shaft device 22 .

[0088] The hinge device 22 of the electronic device 100 of the present invention is synchronously bent or unfolded through the rotating component 25 and the linkage component 26. Since the rotating member 254 and the linkage member 264 and the linkage member 264 and the connecting member 256 are connected by the arc groove and the guide shaft, the connection between the various components in the hinge device 22 can be made more compact, thereby reducing the overall width of the hinge device 22 and reducing the internal space occupied by the shell 20, which is beneficial to the layout of other components such as the motherboard or the battery; secondly, since the elastic member 274 of the limiting mechanism 27 can provide a large axial force, a large friction torque is provided between the first cam 2710 and the second cam 2730; therefore, the total friction torque of the hinge device 22 formed by the friction torque between the first cam 2710 and the second cam 2730 is large enough to achieve the bending limit of the electronic device 100 at a specific angle between 70 degrees and 130 degrees, thereby realizing the hovering function of the whole machine. In addition, the linkage component 26 of the hinge device 22 is fixedly connected to the rotating component 25 via the rotating shaft 266 and the positioning hole 2516 of the positioning seat 251, the rotating member 254 and the linkage member 264 are connected via the first guide slide 2540 axis, the linkage member 264 and the connecting member 256 are connected via the second guide slide axis 2641, the side support member 233 is connected to the rotating member 254 via the guide slide column 2548, and the opposite ends of the side support member 233 away from the middle support member 231 are respectively connected to the connecting member 256, thereby making the structure of the hinge device 22 firm and improving the overall strength of the electronic device 100.

[0089] The above is an implementation of the embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the embodiment of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A rotating shaft device, characterized in that: The rotating shaft device comprises: A support mechanism, the support mechanism comprising a side support member and a middle support member, the two side support members are arranged on two opposite sides of the middle support member, and the middle support member and the side support member are used to support the flexible member; A rotating assembly, the rotating assembly comprising a positioning seat and a rotating mechanism disposed on opposite sides of the positioning seat, the rotating mechanism comprising a rotating member and a connecting member, one end of the rotating member is rotatably connected to the positioning seat, and the other opposite end of the rotating member is rotatably connected to the connecting member; and The linkage assembly comprises a linkage seat and a linkage mechanism, wherein the linkage mechanism comprises a linkage member rotatably connected to the opposite sides of the linkage seat, wherein the linkage member is away from one end of the linkage seat and the corresponding rotating member is connected through a first arc groove and a cooperation connection with the first guide slide shaft, the linkage member is away from one end of the linkage seat and the corresponding connecting member is connected through a second arc groove and a cooperation connection with the second guide slide shaft, the side support member is rotatably connected with the corresponding connecting member, and the side support member is slidably connected with the corresponding rotating member; the rotating mechanism rotates relative to the positioning seat to drive the linkage member to rotate relative to the linkage seat and drive the side support member to rotate and slide relative to the positioning seat, so that the two side supports are synchronously bent or synchronously unfolded with each other; during the synchronous bending process of the side supports, the first guide slide shaft slides from one end of the first arc groove close to the middle support member to one end away from the middle support member, and the second guide slide shaft slides from one end of the second arc groove away from the middle support member to one end close to the middle support member.

2. The rotating shaft device according to claim 1, characterized in that: The first arc groove bends toward a side away from the side support member, and the second arc groove bends toward a side close to the side support member. When the rotating shaft device is in a flattened state, the first arc groove is closer to the side support member than the second arc groove.

3. The rotating shaft device according to claim 1, characterized in that: The first arc groove is arranged on the side of the linkage member facing the rotating member, and the first guide sliding shaft is fixed to the rotating member; or the first arc groove is arranged on the side of the rotating member facing the linkage member, the first guide sliding shaft is fixed to the linkage member, and the first guide sliding shaft is slidably and rotatably inserted in the first arc groove.

4. The rotating shaft device according to claim 1, characterized in that: The connecting member is provided with a convex guide slide portion near the linkage member, the second arc-shaped groove is provided on the guide slide portion, and the second guide slide shaft is fixed to the linkage member; or the second arc-shaped groove is provided on the linkage member, and the second guide slide shaft is fixed to the guide slide portion; the second guide slide shaft is slidably and rotatably inserted into the second arc-shaped groove.

5. The rotating shaft device according to claim 1, characterized in that: The axis center line of the first guide sliding shaft is parallel to the axis center line of the second guide sliding shaft.

6. The rotating shaft device according to claim 1, characterized in that: The side of the side support member away from the middle support member is connected to the connecting member through the cooperation of a first circular arc groove and a first circular arc rail, and the axis line of the first circular arc groove is colinear with the rotation axis line between the side support member and the connecting member; the side of the side support member close to the middle support member is connected to the rotating member through the cooperation of a sliding groove and a guide slide column.

7. The rotating shaft device according to claim 6, characterized in that: The slide groove extends obliquely toward a side away from the middle support member, and the axis center line of the guide slide column is parallel to the axis center line of the first circular arc groove.

8. The rotating shaft device according to claim 1, characterized in that: The positioning seat and the rotating member are connected through the cooperation of a second circular arc groove and a second circular arc rail, and the axis of the second circular arc rail is colinear with the axis of rotation between the rotating member and the positioning seat.

9. The rotating shaft device according to claim 8, characterized in that: One end of the rotating member away from the connecting member is arranged between the middle supporting member and the positioning seat, and the middle supporting member is provided with an arc guide surface corresponding to the second arc rail.

10. The rotating shaft device according to claim 1, characterized in that: The rotation axis center line between the rotating member and the positioning seat is parallel to the rotation axis center line between the linkage member and the linkage seat.

11. The rotating shaft device according to claim 1, characterized in that: The linkage mechanism also includes two rotating shafts and a gear combination located between the linkage parts. The two linkage parts are respectively connected to the two rotating shafts. The linkage seat is provided with a connecting shaft in a direction parallel to the rotating shaft. The gear combination is arranged on the connecting shaft. The end of each linkage part away from the connecting part is provided with a first gear that meshes with the gear combination.

12. The rotating shaft device according to claim 11, characterized in that: The rotating shaft device also includes a limiting mechanism, which includes a push member, a holding member and an elastic member arranged on the linkage member, the elastic member provides an elastic force for the holding member and the push member to abut against each other, the rotating mechanism rotates relative to the positioning seat through the linkage mechanism, the push member rotates relative to the holding member, the elastic member is elastically squeezed and elastically deformed, and the friction resistance between the push member and the holding member positions the linkage member relative to the linkage seat, so as to realize the positioning of the side support member at a specific angle relative to the middle support member.

13. The rotating shaft device according to claim 12, characterized in that: The pushing member includes a first cam, the holding member includes a second cam, the first cam and the second cam are rotatably held against each other, and the elastic member elastically pushes the holding member.

14. The rotating shaft device according to claim 13, characterized in that: The friction torque between the first cam and the second cam is greater than the rebound force of the flexible member, so that the two side support members are positioned at a specific angle.

15. The rotating shaft device according to claim 12, characterized in that: The supporting member and the elastic member are sleeved on the rotating shaft, and the limiting mechanism also includes a positioning member arranged at one end of the rotating shaft away from the supporting member, the supporting member is located between the supporting member and the elastic member, and one end of the elastic member away from the supporting member elastically presses against the positioning member.

16. The rotating shaft device according to claim 12, characterized in that: Each linkage member is connected to the push member, and each push member includes a first cam; the support member includes two second cams, and the two second cams are respectively slidably mounted on the two rotating shafts, and the linkage member rotates along the rotating shaft with the rotating member to drive the first cam to rotate relative to the second cam.

17. The rotating shaft device according to claim 12, characterized in that: The end of the rotating shaft away from the elastic member is connected to the positioning seat.

18. A foldable housing, characterized in that: The folding shell includes a pivot device as described in any one of claims 1 to 17 and two frames, wherein the pivot device is located between the two frames, and the two frames are respectively connected to the connecting parts of the two rotating mechanisms of the pivot device, and the frame drives the rotating mechanism to rotate relative to the positioning seat, and the supporting mechanism realizes synchronous bending or unfolding with the rotating mechanism and the linkage mechanism.

19. An electronic device, characterized in that: The electronic device comprises a flexible member and the folding shell as claimed in claim 18, wherein the flexible member is arranged on the folding shell, and the flexible member is bent or flattened along with the folding shell.

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