Folding device, folding shell and electronic equipment

Abstract

The invention provides a folding device which comprises a base, a rotating mechanism, a synchronizing mechanism and a supporting mechanism, the rotating mechanism comprises a rotating piece and a connecting piece, one end of the rotating piece is rotatably connected to the base, and the end, away from the base, of the rotating piece is slidably connected to the connecting piece; the synchronizing mechanism comprises a connecting shaft and a synchronizing part, the connecting shaft is connected to the base, one end of the synchronizing part is rotationally connected to the connecting shaft, the end, away from the connecting shaft, of the synchronizing part is rotationally connected to the connecting part, and the axis of the connecting shaft is parallel to the axis between the rotating part and the base; the supporting mechanism comprises a side supporting piece, the side supporting piece is rotatably connected to the connecting piece, the rotating piece is slidably connected to the side supporting piece, and the synchronous piece is slidably and rotatably connected to the side supporting piece; when the folding device is in a folded state, the folding angle of the rotating piece relative to the base is consistent with the folding angle of the connecting piece relative to the base. The invention further provides the folding shell and the electronic equipment.

Description

Technical Field

[0001] The present invention relates to the field of electronic equipment, and in particular to a folding device for supporting a flexible screen, a folding shell provided with the folding 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. Folding screen devices equipped with bendable flexible display screens are becoming more and more popular due to their unique shape and diverse functions. At present, the inner folding methods of bendable flexible display screens include U-shaped folding and teardrop-shaped folding. Since the teardrop-shaped folding mechanism is thin and flat, it is widely used to support bendable flexible display screens. The teardrop-shaped folding mechanism generally includes a base, a track rotating rod and a guide slide bar. The track rotating rod is rotatably connected to the base, and the guide slide bar is rotatably connected to the base. The track rotating rod and the guide slide bar are generally connected by a pin shaft. However, when the existing teardrop-shaped folding mechanism is folded, the angle at which the track rotating rod rotates relative to the base is greater than the angle at which the guide slide bar rotates relative to the base, resulting in a smaller gap between the track rotating rod and the bendable flexible display screen. Therefore, when the teardrop-shaped folding mechanism is dropped and impacted, it is more likely that the track rotating rod hits the bendable flexible display screen, causing the bendable flexible display screen to fail. Summary of the Invention

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

[0004] The present application provides a folding device, which includes a base, a rotating mechanism, a synchronization mechanism and a support mechanism. The rotating mechanism includes a rotating member and a connecting member, one end of the rotating member is rotatably connected to the base, and the end of the rotating member away from the base is slidably connected to the connecting member; the synchronization mechanism includes a connecting shaft and a synchronization member, the connecting shaft is connected to the base, one end of the synchronization member is rotatably connected to the connecting shaft, and the end of the synchronization member away from the connecting shaft is rotatably connected to the connecting member, and the axis of the connecting shaft is parallel to the axis between the rotating member and the base; the support mechanism includes a side support member, the side support member is rotatably connected to the connecting member, the rotating member is slidably connected to the side support, and the synchronization member is slidably and rotatably connected to the side support; when the folding device is in a folded state, the folding angle of the rotating member relative to the base is consistent with the folding angle of the connecting member relative to the base.

[0005] The application further provides a folding shell, which comprises a folding device and two frame bodies, and the folding device is located between the two frame bodies. The folding device comprises a base, a rotating mechanism, a synchronous mechanism and a supporting mechanism. The rotating mechanism comprises a rotating piece and a connecting piece. One end of the rotating piece is rotationally connected to the base, and the end of the rotating piece away from the base is slidingly connected to the connecting piece. The synchronous mechanism comprises a connecting shaft and a synchronous piece. The connecting shaft is connected to the base, one end of the synchronous piece is rotationally connected to the connecting shaft, and the end of the synchronous piece away from the connecting shaft is rotationally connected to the connecting piece. The axis of the connecting shaft is parallel to the axis between the rotating piece and the base. The supporting mechanism comprises a side supporting piece. The side supporting piece is rotationally connected to the connecting piece, the rotating piece is slidingly connected to the side supporting piece, and the synchronous piece is slidingly and rotationally connected to the side supporting piece. The connecting piece is fixedly connected to the frame body. When the folding device is in a folding state, the folding angle of the rotating piece relative to the base is consistent with the folding angle of the connecting piece relative to the base.

[0006] The application further provides an electronic device, which comprises a flexible screen and a folding shell. The flexible screen comprises a bendable area and two non-bendable areas. The bendable area is located between the two non-bendable areas. The folding shell comprises a folding device and two frame bodies. The folding device is located between the two frame bodies. The folding device comprises a base, a rotating mechanism, a synchronous mechanism and a supporting mechanism. The rotating mechanism comprises a rotating piece and a connecting piece. One end of the rotating piece is rotationally connected to the base, and the end of the rotating piece away from the base is slidingly connected to the connecting piece. The synchronous mechanism comprises a connecting shaft and a synchronous piece. The connecting shaft is connected to the base, one end of the synchronous piece is rotationally connected to the connecting shaft, and the end of the synchronous piece away from the connecting shaft is rotationally connected to the connecting piece. The axis of the connecting shaft is parallel to the axis between the rotating piece and the base. The supporting mechanism comprises a side supporting piece. The side supporting piece is rotationally connected to the connecting piece, the rotating piece is slidingly connected to the side supporting piece, and the synchronous piece is slidingly and rotationally connected to the side supporting piece. The connecting piece is fixedly connected to the frame body. The front surface of the side supporting piece of the folding shell is connected to the back surface of the bendable area, and the non-bendable areas are connected to the front surfaces of the frame bodies.

[0007] One end of the rotating piece of the folding device is rotationally connected to the base, and the end of the rotating piece away from the base is slidingly connected to the connecting piece. One end of the synchronous piece is rotationally connected to the connecting shaft, and the end of the synchronous piece away from the base is rotationally connected to the connecting piece. When the folding device is in the folded state, the folding angle of the rotating piece relative to the base is consistent with the folding angle of the connecting piece relative to the base, and the folding angle of the side support piece relative to the base is greater than the folding angle of the rotating piece relative to the base. The folding angle of the rotating piece relative to the base is reduced, so that the space surrounded by the two rotating pieces is larger, and the gap between the rotating piece and the flexible screen is larger. When the electronic device is subjected to a drop impact, the rotating piece is prevented from impacting the flexible screen, thereby avoiding the problem of failure of the flexible screen. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0009] Figure 1 is a perspective structural schematic diagram of an electronic device in one embodiment of the present application;

[0010] Figure 2 is Figure 1 a perspective structural exploded schematic diagram of the electronic device in

[0011] Figure 3 is Figure 2 a further perspective structural schematic diagram of the electronic device in

[0012] Figure 4 is Figure 3 a perspective structural schematic diagram of the electronic device in another view in

[0013] Figure 5 is Figure 3 a perspective structural enlarged view of the folding device in

[0014] Figure 6 is Figure 5 a perspective structural exploded schematic diagram of the folding device in

[0015] Figure 7 is Figure 6 a perspective structural schematic diagram of the folding device in another view in

[0016] Figure 8 is Figure 5 a perspective structural exploded schematic diagram of the folding device in another view in

[0017] Figure 9 isFigure 8 Figure 6 is a further perspective exploded view schematic of the folding device in Figure 1 ;

[0018] Figure 10 Figure 7 is a perspective view schematic of the folding device in Figure 1 ; Figure 6 Figure 8 is a perspective view schematic of the folding device in Figure 1 from another angle;

[0019] Figure 11 Figure 9 is a perspective view schematic of the folding device in Figure 1 from another angle; Figure 10 Figure 10 is a perspective view schematic of the folding device in Figure 1 from another angle;

[0020] Figure 12 Figure 11 is a perspective view schematic of the folding device in Figure 1 from another angle; Figure 10 Figure 12 is a perspective view schematic of the folding device in Figure 1 from another angle;

[0021] Figure 13 Figure 13 is a perspective view schematic of the folding device in Figure 1 from another angle; Figure 12 Figure 14 is a perspective view schematic of the folding device in Figure 1 from another angle;

[0022] Figure 14 Figure 15 is a perspective view schematic of the folding device in Figure 1 from another angle; Figure 12 Figure 16 is a perspective view schematic of the folding device in Figure 1 from another angle;

[0023] Figure 15 Figure 17 is a perspective view schematic of the folding device in Figure 1 from another angle; Figure 14 Figure 18 is a perspective view schematic of the folding device in Figure 1 from another angle;

[0024] Figure 16 Figure 19 is a perspective exploded view schematic of the folding device in Figure 1 ; Figure 14 Figure 20 is a perspective view schematic of the folding device in Figure 1 from another angle;

[0025] Figure 17 Figure 21 is a perspective view schematic of the folding device in Figure 1 from another angle; Figure 16 Figure 22 is a perspective view schematic of the folding device in Figure 1 from another angle;

[0026] Figure 18 Figure 23 is a perspective view schematic of the folding device in Figure 1 from another angle; Figure 9 Figure 24 is a perspective view schematic of the folding device in Figure 1 from another angle;

[0027] Figure 19 Figure 25 is a perspective view schematic of the folding device in Figure 1 from another angle; Figure 18 Figure 26 is a perspective view schematic of the folding device in Figure 1 from another angle;

[0028] Figure 20 Figure 27 is a cross-sectional view of the folding device in Figure 1 ; Figure 5 Figure 28 is another cross-sectional view of the folding device in Figure 1 ;

[0029] Figure 21 Figure 29 is a cross-sectional view of the folding device in Figure 1 ; Figure 5 Figure 30 is another cross-sectional view of the folding device in Figure 1 ;

[0030] Figure 22 Figure 31 is a cross-sectional view of the folding device in Figure 1 ; Figure 21 Figure 32 is a cross-sectional view of the folding device in Figure 1 ;

[0031] Figure 23 Figure 33 is a cross-sectional view of the folding device in Figure 1 ;Figure 5 Another perspective sectional view of the folding device in

[0032] Figure 24 is Figure 5 Another perspective sectional view of the folding device in

[0033] Figure 25 is Figure 5 Another perspective sectional view of the folding device in

[0034] Figure 26 is Figure 5 Still another perspective sectional view of the folding device in

[0035] Figure 27 is Figure 5 Still another perspective sectional view of the folding device in

[0036] Figure 28 is Figure 1 A perspective view of the electronic device in the folded state in

[0037] Figure 29 is Figure 28 A perspective exploded view of the electronic device in

[0038] Figure 30 is Figure 29 A perspective view of the folding device in

[0039] Figure 31 is Figure 30 A perspective view of the folding device in

[0040] Figure 32 is Figure 30 A perspective exploded view of the folding device in

[0041] Figure 33 is Figure 30 A perspective sectional view of the folding device in

[0042] Figure 34 is Figure 30 Another perspective sectional view of the folding device in

[0043] Figure 35 is Figure 34 A sectional view of the folding device in

[0044] Figure 36 is Figure 30 Another perspective sectional view of the folding device in

[0045] Figure 37 is Figure 30 Another perspective sectional view of the folding device in

[0046] Figure 38 is Figure 30 a further perspective cross-sectional view of the folding device in

[0047] Figure 39 is Figure 30 a further perspective cross-sectional view of the folding device in

[0048] Main reference signs:

[0049] 100, electronic device; 20, folding housing; 21, frame; 211, first front surface; 212, first back surface; 214, first side surface; 215, first end surface; 216, mounting groove; 217, mounting portion; 22, folding device; 23, assisting component; 230, base; 2302, first through hole; 231, assisting space; 2310, first positioning hole; 232, first circular arc groove; 233, first connecting portion; 2332, fixing groove; 2334, positioning hole; 234, second connecting portion; 2341, connecting rod; 2343, protrusion; 2344, first accommodation space; 2345, second accommodation space; 2346, connecting hole; 2347, first support hole; 24, rotating mechanism; 242, connecting piece; 2420, sliding rail; 2421, sliding space; 2422, first positioning block; 2423, fixing portion; 2424, second circular arc groove; 2425, arc-shaped groove; 2426, second avoiding space; 2429, second positioning groove; 2427, first avoiding groove; 2428, fixing hole; 244, rotating piece; 2440, sliding groove; 2442, sliding portion; 2443, rotating portion; 2443a, avoiding opening; 2444, first positioning groove; 2445, connecting piece; 2446, first avoiding space; 2447, first circular arc rail; 2448, limiting shaft; 25, synchronizing mechanism; 250, connecting shaft; 2501, shaft body; 2502, connecting cap; 2504, clamping groove; 252, synchronizing piece; 2520, rotating cylinder; 2521, avoiding opening; 2522, first rolling rod; 2523, second rolling rod; 2524, movable plate; 2525, arc-shaped rail; 2526, connecting plate; 2527, rotating hole; 2528, avoiding groove; 255, synchronizing gear assembly; 2551, driving gear; 2553, driven gear; 2555, rotating shaft; 26, supporting mechanism; 260, limiting groove; 2601, first limiting end; 2603, second limiting end; 2605, second circular arc rail; 262, side supporting piece; 2620, side supporting plate; 263, middle supporting piece; 2630, middle supporting plate; 2631, guide rotating strip; 2632, first positioning cylinder; 2633, fixing block; 2634, avoiding space; 2635, second positioning cylinder; 2636, avoiding groove; 2637, counterbore; 2638, second avoiding groove; 264, first connecting block; 265, second connecting block; 2651, first rolling groove; 2652, first rolling surface; 2653, second rolling groove; 2654, second rolling surface; 266, second positioning block; 27, limiting mechanism; 271, first rotating cam; 2711, first protruding portion; 2713, first recessed portion; 272, first abutting piece; 2721, first abutting cylinder; 2723, first connecting strip; 2724, first sliding hole; 2725, first abutting cam; 2725a, first protruding portion; 2725b, first recessed portion; 273, second rotating cam;2731, second protruding part; 2733, second recessed part; 274, second abutting member; 2741, second abutting cylinder; 2743, second connecting strip; 2744, second sliding hole; 2745, second abutting cam; 2745a, second protruding part; 2745b, second recessed part; 2746, second supporting hole; 2747, supporting rod; 275, elastic member; 276, positioning pad; 2762, second through hole; 278, buckle; 2782, C-shaped buckle; 28, back shell; 282, positioning space; 284, clamping groove; 286, fixing column; 2862, first fixing hole; 2864, second fixing hole; 40, flexible screen; 41, bendable area; 43, non-bendable area. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0051] In addition, the following description of each embodiment is with reference to the additional drawings to illustrate specific embodiments that can be used to implement the present application. The directional terms mentioned in the present application, such as “up”, “down”, “front”, “back”, “left”, “right”, “inner”, “outer”, “side” and the like, are only the directions of the additional drawings, therefore, the directional terms used are for better, clearer illustration and understanding of the present application, and are not indicative or implied that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0052] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting”, “arranged on” should be understood broadly, for example, can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the internal connection of two elements. For a person of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0053] Please refer to Figures 1 to 9The electronic device 100 in one of the embodiments of the present application comprises a folding shell 20 and a flexible screen 40 arranged on the folding shell 20. The folding shell 20 comprises two frame bodies 21 and a folding device 22 located between the two frame bodies 21. The opposite sides of the folding device 22 are connected to the two frame bodies 21 respectively. The flexible screen 40 comprises a bendable area 41 and two non-bendable areas 43. The bendable area 41 is located between the two non-bendable areas 43. The flexible screen 40 covers the front surface of the folding shell 20. The bendable area 41 faces the front surface of the folding device 22. The two non-bendable areas 43 can be connected to the front surfaces of the two frame bodies 21 respectively. The bendable area 41 of the flexible screen 40 can be folded or flattened with the folding device 22. The folding device 22 comprises an assisting rotating assembly 23, a supporting mechanism 26 and a back shell 28. The assisting rotating assembly 23 comprises a base 230, a rotating mechanism 24, a synchronous mechanism 25 and a limiting mechanism 27. The rotating mechanism 24 comprises a connecting piece 242 and a rotating piece 244. One end of the rotating piece 244 is rotatably connected to the base 230. The end of the rotating piece 244 away from the base 230 is slidably connected to the connecting piece 242. The synchronous mechanism 25 comprises a connecting shaft 250 and a synchronous piece 252. The connecting shaft 250 is connected to the base 230. One end of the synchronous piece 252 is rotatably connected to the connecting shaft 250. The end of the synchronous piece 252 away from the base 230 is slidably and rotatably connected to the connecting piece 242. The axis of the connecting shaft 250 is parallel to the axis between the rotating piece 244 and the base 230. The supporting mechanism 26 comprises two side supporting pieces 262 and a middle supporting piece 263 located between the two side supporting pieces 262. The side supporting pieces 262 are rotatably connected to the connecting piece 242. The rotating piece 244 is slidably connected to the side supporting pieces 262. The synchronous piece 252 is slidably and rotatably connected to the side supporting pieces 262. The middle supporting piece 263 is connected to the front surface of the base 230. When the folding device 22 is in a folding state, the folding angle of the rotating piece 244 relative to the base 230 is consistent with the folding angle of the connecting piece 242 relative to the base 230. The folding angle of the side supporting pieces 262 relative to the base 230 is greater than the folding angle of the rotating piece 244 relative to the base 230. In this embodiment, the assisting rotating assembly 23 comprises two rotating mechanisms 24. The two rotating mechanisms 24 are located at opposite sides of the base 230. The two rotating pieces 244 are rotatably connected to the opposite sides of the base 230 respectively. The synchronous mechanism 25 comprises two connecting shafts 250 and two synchronous pieces 252. The two connecting shafts 250 are parallelly and spacedly connected to one end of the base 230. The two synchronous pieces 252 are rotatably connected to the two connecting shafts 250 respectively. The ends of the two synchronous pieces 252 away from the base 230 are slidably and rotatably connected to the two connecting pieces 242 respectively.

[0054] The assisting components 23 are located between the supporting mechanism 26 and the back shell 28. In this embodiment, two assisting components 23 are provided between the supporting mechanism 26 and the back shell 28, and the two assisting components 23 are located at opposite ends of the back shell 28. In other embodiments, the folding device 22 can include only one assisting component 23, which is preferably located at the middle of the back shell 28; or the folding device 22 includes more than three assisting components 23, which are preferably arranged at intervals along the length direction of the back shell 28.

[0055] It can be understood that the front side refers to the side with the same light-emitting surface of the flexible screen 40, and the back side refers to the side with the opposite light-emitting surface of the flexible screen 40. The flexible screen 40 can be, but is not limited to, a flexible display screen, a flexible touch screen, a flexible touch display screen, and various flexible components with corresponding functions, or a flexible component fixedly attached with a flexible support plate, such as a flexible display screen attached with a flexible steel plate, a flexible touch screen, etc. The electronic device 100 can be a mobile phone, a tablet computer, a computer, or other non-electronic products that require the folding device 22. The frame 21 can accommodate electronic components such as a battery, a PCB assembly, a loudspeaker, a receiver, a camera, and a key. The electronic components of the two frames 21 are electrically connected through a flexible circuit board passing through the folding device 22. In the description of the embodiments of the present application, "connection" includes both direct connection and indirect connection, such as A and B connection including A and B direct connection or connection through a third element C or more other elements. The connection also includes integrated connection and non-integrated connection. Integrated connection means that A and B are integrally formed and connected, and non-integrated connection means that A and B are non-integrally formed and connected.

[0056] Compared with the water droplet-shaped folding mechanism in the prior art, the folding angle of the trajectory rotating rod relative to the base is greater than the folding angle of the guide sliding rod relative to the base when the water droplet-shaped folding mechanism is in the folded state. The folding angle of the guide sliding rod relative to the base is generally 90 degrees, and the folding angle of the trajectory rotating rod relative to the base is greater than 90 degrees. The space surrounded by the two trajectory rotating rods is smaller, so that the gap between the trajectory rotating rod and the flexible screen is smaller, or the trajectory rotating rod contacts the flexible screen. When the water droplet-shaped folding mechanism is subjected to a drop impact, the trajectory rotating rod is likely to hit the bendable flexible display screen, causing failure of the bendable flexible display screen. The end of the rotating member 244 of the folding device 22 of the present application is rotatably connected to the base 230. The end of the rotating member 244 away from the base 230 is slidably connected to the connecting member 242. One end of the synchronous member 252 is rotatably connected to the connecting shaft 250. The end of the synchronous member 252 away from the base 230 is slidably and rotatably connected to the connecting member 242. When the folding device 22 is in the folded state, the folding angle of the rotating member 244 relative to the base 230 is consistent with the folding angle of the connecting member 242 relative to the base 230. The folding angle of the side support member 262 relative to the base 230 is greater than the folding angle of the rotating member 244 relative to the base 230. The folding angle of the rotating member 244 relative to the base 230 is reduced. Optionally, the folding angle of the rotating member 244 relative to the base 230 is 90 degrees. This makes the space surrounded by the two rotating members 244 larger, and the gap between the rotating member 244 and the flexible screen 40 larger. When the electronic device 100 is subjected to a drop impact, the rotating member 244 is prevented from hitting the flexible screen 40, thereby preventing failure of the flexible screen 40. Secondly, since the folding angle of the rotating member 244 relative to the base 230 is reduced, the amount of rotation of the rotating member 244 relative to the base 230 is reduced. Therefore, the amount of overlap between the rotating member 244 and the base 230 is larger, thereby improving the impact resistance and reliability of the folding device 22. It can be understood that the rotating member 244 in the present application corresponds to the trajectory rotating rod in the prior art, and the connecting member 242 corresponds to the guide sliding rod in the prior art.

[0057] In the present embodiment, when the folding device 22 is in the folded state, the folding angles of the rotating member 244 and the connecting member 242 relative to the base 230 are 90 degrees, and the folding angle of the side support member 262 relative to the base 230 is 110 degrees. This makes the side support member 262, the rotating member 244 and the base 230 surround a water droplet-shaped space. In other embodiments, the folding angle of the rotating member 244 relative to the base 230 can be adjusted as needed. Specifically, the folding angle of the rotating member 244 relative to the base 230 can range from 85 degrees to 95 degrees. The folding angle of the side support member 262 relative to the base 230 can be adjusted as needed. Specifically, the folding angle of the side support member 262 relative to the base 230 can range from 100 degrees to 120 degrees.

[0058] Please refer to Figures 9-17 The rotating member 244 is connected with the connecting member 242 through a sliding groove and a sliding rail. The sliding groove is arranged in one of the rotating member 244 and the connecting member 242, and the sliding rail is arranged in the other one of the rotating member 244 and the connecting member 242. In the embodiment, the end of the rotating member 244 away from the base 230 is provided with a sliding groove 2440, and the end of the connecting member 242 is provided with a sliding rail 2420, and the sliding rail 2420 is slidingly arranged in the sliding groove 2440. In other embodiments, the end of the rotating member 244 away from the base 230 is provided with a sliding rail, and the end of the connecting member 242 is provided with a sliding groove.

[0059] Specifically, the rotating member 244 includes a sliding part 2442 and a rotating part 2443 located at opposite ends of the rotating member 244, and a connecting piece 2445 connected between the sliding part 2442 and the rotating part 2443. The sliding part 2442 is located at the end away from the base 230, and the rotating part 2443 is located at the end away from the connecting member 242. The connecting member 242 is a rectangular strip, and the side of the connecting member 242 facing the base 230 is provided with a sliding space 2421, and the sliding part 2442 is slidingly arranged in the sliding space 2421. The sliding groove 2440 is arranged in one of the inner surfaces of the sliding part 2442 and the sliding space 2421, and the sliding rail 2420 is arranged in the other one of the inner surfaces of the sliding part 2442 and the sliding space 2421. In the embodiment, the opposite sides of the sliding part 2442 are respectively provided with the sliding grooves 2440, and the opposite inner sides of the sliding space 2421 of the connecting member 242 are respectively provided with the sliding rails 2420, and the two sliding rails 2420 are respectively slidingly arranged in the two sliding grooves 2440.

[0060] In other embodiments, the opposite sides of the sliding part 2442 are respectively provided with the sliding rails, the opposite inner sides of the sliding space 2421 of the connecting member 242 are respectively provided with the sliding grooves, and the two sliding rails are respectively slidingly arranged in the two sliding grooves.

[0061] Optionally, the sliding groove 2440 is an inclined groove, the length direction of the inclined groove is inclined to the axial direction of the connecting shaft 250, and the sliding rail 2420 is an inclined rail, the inclined rail is parallel to the inclined groove, and the inclined rail is slidingly arranged in the inclined groove. Specifically, the end of the sliding groove 2440 close to the side part support 262 is farther away from the base 230 than the other end of the sliding groove 2440 away from the side part support 262, and the end of the sliding rail 2420 close to the front surface of the connecting member 242 is farther away from the base 230 than the end of the sliding rail 2420 close to the back surface of the connecting member 242.

[0062] In other embodiments, the sliding groove 2440 can also be an arc-shaped groove, and the sliding rail 2420 can also be an arc-shaped rail, the middle part of the arc-shaped groove is curved towards the side close to the base 230, and the middle part of the arc-shaped rail is curved towards the side close to the base 230, and the arc-shaped rail is slidingly accommodated in the arc-shaped groove.

[0063] Optionally, the sliding rail 2420 is provided with a first positioning block 2422 at one end close to the side support 262, and the sliding part 2442 is provided with a first positioning groove 2444 at one end of the sliding groove 2440, and the first positioning groove 2444 communicates with the sliding groove 2440; when the folding device 22 is in the unfolded state, the first positioning block 2422 is positioned in the first positioning groove 2444, so that the connecting piece 242 is positioned in the rotating piece 244.

[0064] Optionally, the middle part of the sliding part 2442 is provided with a first avoiding space 2446, and the connecting piece 242 is provided with a fixed part 2423 protruding towards the sliding space 2421, the fixed part 2423 is used for fixing the frame 21, and the fixed part 2423 is accommodated in the first avoiding space 2446.

[0065] As shown in Figure 9 and Figures 12-17 , the rotating part 2443 of the rotating piece 244 is connected with the base 230 through the cooperation of a first arc-shaped rail and a first arc-shaped groove, the first arc-shaped rail is arranged on one of the rotating part 2443 and the base 230, and the first arc-shaped groove is arranged on the other one of the rotating part 2443 and the base 230, and the axis of the first arc-shaped rail is parallel to the axis of the connecting shaft 250. In the embodiment, the base 230 is provided with two rotating mechanisms 24 at opposite sides, and the rotating part 2443 of one of the rotating mechanisms 24 is connected with one side of the base 230 through the cooperation of the first arc-shaped rail and the first arc-shaped groove, and the rotating part 2443 of the other rotating mechanism 24 is connected with the opposite side of the base 230 through the cooperation of the first arc-shaped rail and the first arc-shaped groove. The rotating part 2443 is provided with a first arc-shaped rail 2447, and one side of the base 230 is provided with a first arc-shaped groove 232, and the first arc-shaped rail 2447 is rotatably accommodated in the first arc-shaped groove 232. In the embodiment, the rotating part 2443 is an arc-shaped plate, two first arc-shaped rails 2447 are arranged at opposite ends of the arc-shaped plate respectively, and the axis of the first arc-shaped rail 2447 is collinear with the axis of the arc-shaped plate; the middle part of the rotating part 2443 is provided with an avoiding opening 2443a, and the avoiding opening 2443a penetrates through the side of the rotating part 2443 away from the fixed part 2423.

[0066] In other embodiments, the rotating part 2443 is provided with a first arc-shaped groove, and the opposite sides of the base 230 are respectively provided with a first arc-shaped rail, and the two first arc-shaped rails are respectively rotatably accommodated in the two first arc-shaped grooves.

[0067] The front surface of the base 230 is provided with a rotating space 231, the rotating part 2443 is rotatably accommodated in the rotating space 231, and the middle support 263 is connected to the front surface of the base 230 so that the middle support 263 covers the rotating part 2443. The rotating axis of the rotating part 2443 is parallel to the axis of the connecting shaft 250. In this embodiment, the front surface of the base 230 is provided with rotating spaces 231 on opposite sides, and the rotating parts 2443 of the two rotating members 244 are rotatably accommodated in the two rotating spaces 231, respectively. Specifically, the opposite ends of the rotating part 2443 are provided with first circular arc tracks 2447, the opposite inner end surfaces of each rotating space 231 of the base 230 are provided with first circular arc grooves 232, the axis of the first circular arc groove 232 is parallel to the axis of the connecting shaft 250, the two first circular arc grooves 232 of each rotating space 231 are coaxial, and the axes of the first circular arc grooves 232 on the two rotating spaces 231 are parallel and spaced apart. The two first circular arc tracks 2447 of each rotating part 2443 are rotatably accommodated in the two first circular arc grooves 232 of the corresponding rotating space 231. When the folding device 22 is in the unfolded state, the end surface of the rotating part 2443 away from the connecting member 242, the front surface of the middle support 263, and the front surface of the base 230 are coplanar.

[0068] In other embodiments, the opposite ends of the rotating part 2443 are provided with first circular arc grooves, the opposite inner end surfaces of each rotating space 231 of the base 230 are provided with first circular arc tracks, the two first circular arc tracks of each rotating space 231 are coaxial, and the axes of the first circular arc tracks on the two rotating spaces 231 are parallel and spaced apart. The two first circular arc tracks of each rotating space 231 are rotatably accommodated in the two first circular arc grooves of the corresponding rotating part 2443.

[0069] Optionally, the base 230 comprises a first connecting portion 233 and a second connecting portion 234 located at opposite ends of the base 230. The first connecting portion 233 is a rectangular block, and opposite sides of the front face of the rectangular block are respectively provided with a transfer assisting space 231. The two transfer assisting spaces 231 are opposite to each other in the width direction of the first connecting portion 233. The first connecting portion 233 is provided with a first circular arc slot 232 at opposite end faces of each transfer assisting space 231. In other embodiments, the two transfer assisting spaces 231 are staggered in the length direction parallel to the first connecting portion 233, and the two transfer assisting spaces 231 can also be communicated with each other. The first connecting portion 233 is provided with a first positioning hole 2310 at the bottom face 2311 of each transfer assisting space 231. The two first positioning holes 2310 are both through the front face of the first connecting portion 233 and are communicated with each other. The front face of the first connecting portion 233 is provided with a fixing slot 2332 near one end of the second connecting portion 234, and the first connecting portion 233 is provided with a positioning hole 2334 at the bottom face of the fixing slot 2332. The second connecting portion 234 comprises a connecting rod 2341 and two protrusions 2343. One end of the connecting rod 2341 is connected to the middle of one end of the first connecting portion 233. The two protrusions 2343 are respectively arranged at opposite sides of the connecting rod 2341 away from the first connecting portion 233. Each protrusion 2343, the connecting rod 2341 and the first connecting portion 233 enclose a first containing space 2344. The front face of the connecting rod 2341 is provided with a second containing space 2345 near one end of the first connecting portion 233. The second containing space 2345 is communicated with the first containing spaces 2344 at opposite sides of the connecting rod 2341. Each protrusion 2343 is provided with a connecting hole 2346 in the axial direction parallel to the connecting shaft 250. The end face of the second connecting portion 234 away from the first connecting portion 233 is provided with first support holes 2347 spaced from each other. The axial direction of the connecting hole 2346 is parallel to the axial direction of the first support hole 2347. The front face of the base 230 is provided with two first through holes 2302. One of the first through holes 2302 is arranged at one end of the first connecting portion 233 away from the second connecting portion 234, and the other first through hole 2302 is arranged at one end of the second connecting portion 234 away from the first connecting portion 233. Optionally, the outer surface of the protrusion 2343 is provided with a circular arc surface.

[0070] As Figures 6-9 and Figures 12-17As shown, the side support 262 is connected with the rotating member 244 through the cooperation of a limiting groove and a limiting shaft. The limiting groove is arranged in one of the side support 262 and the rotating member 244, and the limiting shaft is arranged in the other one of the side support 262 and the rotating member 244. The axis of the limiting shaft is parallel to the axis of the connecting shaft 250. In the embodiment, the side of the rotating member 244 close to one end of the connecting member 242 is provided with the limiting shaft 2448, and the limiting groove 260 is arranged in the side support 262. The axis of the limiting shaft 2448 is parallel to the axis of the connecting shaft 250, and the limiting shaft 2448 is slidably accommodated in the limiting groove 260. In other embodiments, the side of the rotating member 244 close to one end of the connecting member 242 is provided with the limiting groove, and the back of the side support 262 is provided with the limiting shaft, which is slidably accommodated in the limiting groove.

[0071] In the embodiment, the limiting shaft 2448 is arranged on the side of the rotating member 244 between the sliding groove 2440 and the base, and specifically, the limiting shaft 2448 is close to the sliding groove 2440. The limiting groove 260 is arranged on the back of the side support 262 away from the base 230, and has a first limiting end 2601 and a second limiting end 2603 at opposite ends thereof. The first limiting end 2601 is closer to the base 230 than the second limiting end 2603. When the folding device 22 is in the unfolded state, the limiting shaft 2448 is positioned at the second limiting end 2603. When the folding device 22 is in the folded state, the limiting shaft 2448 is positioned at the first limiting end 2601.

[0072] As shown in FIG. 6, the folding device 22 is in the unfolded state, and the limiting shaft 2448 is positioned at the second limiting end 2603 of the limiting groove 260. The side of the rotating member 244 close to the connecting member 242 is provided with the limiting groove 2440, and the back of the side support 262 is provided with the limiting shaft 2448, which is slidably accommodated in the limiting groove 2440. Figures 16-19As shown, the side support 262 comprises a rectangular side support plate 2620, a first connecting block 264, a second connecting block 265 and a second positioning block 266, and the first connecting block 264, the second connecting block 265 and the second positioning block 266 are connected to the back of the side support plate 2620. Specifically, the back of the side support 262 is provided with the first connecting block 264 at opposite ends of the connecting member 242, the second connecting block 265 and the second positioning block 266 are oppositely spaced between the two first connecting blocks 264, and the second positioning block 266 is farther away from the end of the side support plate 2620 than the second connecting block 266. The first connecting block 264, the second connecting block 265 and the second positioning block 266 can be fixedly connected to the side support plate 2620 by means of, but not limited to, clamping, gluing or screwing; in the embodiment, the first connecting block 264, the second connecting block 265 and the second positioning block 266 are integrally formed with the side support plate 2620 by injection molding. The limiting groove 260 is provided at one end of the first connecting block 264 close to the base 230, and the end of the first connecting block 264 away from the base 230 is connected to the side of the connecting member 242 away from the base 230 through the cooperation of a second circular groove and a second circular track, the second circular groove is provided in one of the connecting member 242 and the first connecting block 264, the second circular track is provided in the other one of the connecting member 242 and the first connecting block 264, and the axis of the second circular groove is parallel to the axis of the connecting shaft 250. In the embodiment, the opposite ends of the side of the connecting member 242 away from the base 230 are respectively provided with the second circular groove 2424, and the end of the first connecting block 264 away from the middle support 263 is provided with the second circular track 2605, the axis of the second circular track 2605 is parallel to the axis of the connecting shaft 250, the middle part of the second circular track 2605 is curved to the side of the middle support 263, and the two second circular tracks 2605 are rotatably accommodated in the two second circular grooves 2424, respectively. In other embodiments, the opposite ends of the connecting member 242 are respectively provided with the second circular track, the end of the first connecting block 264 away from the middle support 263 is provided with the second circular groove, and the two second circular tracks are rotatably accommodated in the two second circular grooves, respectively. Specifically, the first connecting block 264 is approximately a rectangular block, the length direction of the first connecting block 264 is perpendicular to the length direction of the side support plate 2620, the limiting groove 260 is provided at the end of the rectangular block close to the middle support 263, and the second circular track 2605 is provided at the end of the rectangular block away from the middle support 263.

[0073] Optionally, the side support 262 and the synchronization member 252 are connected through a rolling groove set and a rolling rod set. The rolling groove set is arranged in one of the side support 262 and the synchronization member 252, and the rolling rod set is arranged in the other one of the side support 262 and the synchronization member 252. In this embodiment, the synchronization member 252 is provided with the rolling rod set at the end away from the base 230, and the second connecting block 265 is provided with the rolling groove set. Specifically, the synchronization member 252 is provided with an avoiding opening 2521 at the end away from the connecting shaft 250, and the second connecting block 265 is movably accommodated in the avoiding opening 2521. The rolling groove set includes a first rolling groove 2651 arranged on one side of the second connecting block 265 and a second rolling groove 2653 arranged on the other side of the second connecting block 265 opposite to the one side. The first rolling groove 2651 and the second rolling groove 2653 are staggered with each other. The rolling rod set includes a first rolling rod 2522 and a second rolling rod 2523. The first rolling rod 2522 is arranged on one side of the avoiding opening 2521, and the second rolling rod 2523 is arranged on the other side of the avoiding opening 2521 opposite to the one side. The first rolling rod 2522 and the second rolling rod 2523 are staggered with each other. The first rolling rod 2522 is rollingly accommodated in the first rolling groove 2651, and the second rolling rod 2523 is rollingly accommodated in the second rolling groove 2653. The first rolling groove 2651 and the second rolling groove 2653 are located at the end of the second connecting block 265 away from the middle support 263, and the first rolling groove 2651 is parallel to the second rolling groove 2653. The first rolling rod 2522 and the second rolling rod 2523 are located at the end of the synchronization member 252 away from the base 230, and the first rolling rod 2522 is parallel to the second rolling rod 2523 and parallel to the axial direction of the connecting shaft 250.

[0074] Specifically, the first rolling groove 2651 penetrates through the side of the second connecting block 265 away from the side support plate 2620, and the first rolling groove 2651 has a first rolling surface 2652. The second rolling groove 2653 penetrates through the side of the second connecting block 265 facing the side support plate 2620, and the second rolling groove 2653 has a second rolling surface 2654. The first rolling surface 2652 is coplanar with the second rolling surface 2654. The first rolling rod 2522 is rollingly attached to the first rolling surface 2652, and the second rolling rod 2523 is rollingly attached to the second rolling surface 2654.

[0075] Optionally, the connecting member 242 and the synchronizing member 252 are connected by an arc-shaped rail and an arc-shaped slot at one end of the connecting shaft 250, the arc-shaped rail is arranged in one of the connecting member 242 and the synchronizing member 252, and the arc-shaped slot is arranged in the other one of the connecting member 242 and the synchronizing member 252, and the middle part of the arc-shaped slot is bent to the side away from the side support plate 2620. In this embodiment, the end of the connecting member 242 away from the sliding space 2421 is provided with an arc-shaped slot 2425, the end of the synchronizing member 252 away from the base 230 is provided with an arc-shaped rail 2525, the middle part of the arc-shaped slot 2425 is bent to the side away from the side support plate 2620, and the arc-shaped rail 2525 is slidably inserted into the arc-shaped slot 2425. Specifically, the front of the connecting member 242 away from the sliding space 2421 is provided with a second avoiding space 2426, the end of the synchronizing member 252 away from the connecting shaft 250 is slidingly and rotatably accommodated in the second avoiding space 2426, the connecting member 242 is provided with two arc-shaped slots 2425 on the opposite two inner sides of the second avoiding space 2426, the end of the synchronizing member 252 away from the connecting shaft 250 is provided with two arc-shaped rails 2525 on the opposite two sides, the two arc-shaped rails 2525 are rotatably accommodated in the two arc-shaped slots 2425, and the avoiding opening 2521 is located between the two arc-shaped rails 2525. The bottom of the second avoiding space 2426 of the connecting member 242 is provided with a first avoiding slot 2427. The front of the connecting member 242 is provided with a plurality of fixing holes 2428, the plurality of fixing holes 2428 are arranged at intervals along the length direction of the connecting member 242, and one of the fixing holes 2428 is arranged on the first positioning block 2422. In other embodiments, the connecting member 242 is provided with two arc-shaped rails on the opposite two inner sides of the second avoiding space 2426, the end of the synchronizing member 252 away from the base 230 is provided with two arc-shaped rails on the opposite two sides, and the two arc-shaped rails are slidably and rotatably inserted into the two arc-shaped slots.

[0076] Optionally, the front of the connecting member 242 away from the base 230 is provided with a second positioning slot 2429, and the second positioning block 266 is positioned in the second positioning slot 2429 when the folding device 22 is in the folded state. Specifically, the second positioning slot 2429 is located near the end of the connecting member 242.

[0077] The middle support 263 is fixedly connected with the first connecting part 233 and the second connecting part 234, and the middle support 263 and the base 230 together clasp the two rotating parts 2443; specifically, the middle support 263 comprises a rectangular middle support plate 2630, the end of the middle support plate 2630 is provided with two guide rotating strips 2631 parallel to each other, the length direction of the guide rotating strip 2631 is parallel to the length direction of the middle support plate 2630, the back surface of each guide rotating strip 2631 is provided as a circular arc surface; the middle part of the two guide rotating strips 2631 at the same end of the middle support plate 2630 is provided with two first positioning cylinders 2632, the axial direction of the first positioning cylinder 2632 is perpendicular to the length direction of the guide rotating strip 2631, the back surface of the middle support plate 2630 close to one end of the guide rotating strip 2631 is provided with a fixed block 2633, the length direction of the fixed block 2633 is parallel to the width direction of the middle support plate 2630. The opposite sides of the middle support plate 2630 close to the fixed block 2633 are provided with avoiding spaces 2634, the back surface of the middle support plate 2630 between the two avoiding spaces 2634 is provided with a second positioning cylinder 2635, the axial line of the first positioning cylinder 2632 is parallel to the axial line of the second positioning cylinder 2635; the back surface of the middle support plate 2630 close to the avoiding space 2634 is provided with multiple avoiding grooves 2636 parallel and spaced, the length direction of the avoiding groove 2636 is parallel to the length direction of the middle support plate 2630. Multiple countersunk holes 2637 are arranged on the middle support plate 2630, one of the countersunk holes 2637 is located on the fixed block 2633. Two second avoiding grooves 2638 parallel and spaced are arranged between the two guide rotating strips 2631, the length direction of the second avoiding groove 2638 is parallel to the length direction of the guide rotating strip 2631, and the second avoiding groove 2638 is located between the first positioning cylinder 2632 and the fixed block 2633.

[0078] As Figure 16 And Figure 17As shown, the connecting shaft 250 comprises a shaft body 2501 and a connecting cap 2502 located at one end of the shaft body 2501, and the end of the shaft body 2501 away from the connecting cap 2502 is provided with a clamping groove 2504 located on the outer peripheral wall of the shaft body 2501 and surrounding the shaft body 2501 in a circumferential direction. The synchronizing member 252 comprises a rotating cylinder 2520, a movable plate 2524 and a connecting plate 2526 connected between the rotating cylinder 2520 and the movable plate 2524; the rotating cylinder 2520 is rotatably sleeved on the connecting shaft 250; specifically, the rotating cylinder 2520 is provided with a rotating hole 2527 along its axis, and the shaft body 2501 of the connecting shaft 250 is inserted into the rotating hole 2527. Two arc-shaped rails 2525 are respectively arranged on opposite sides of the movable plate 2524, and a clearance 2521 is arranged in the middle of the end of the movable plate 2524 away from the connecting plate 2526, the movable plate 2524 is slidingly accommodated in the second clearance space 2426, and the arc-shaped rail 2525 is rotatably accommodated in the arc-shaped groove 2425. The middle of the outer peripheral wall of the rotating cylinder 2520 is provided with a clearance groove 2528 in the radial direction, and the clearance groove 2528 communicates with the inner cavity of the rotating cylinder 2520.

[0079] The synchronizing mechanism 25 further comprises a synchronous gear assembly 255 located between the two rotating cylinders 2520, the synchronous gear assembly 255 comprising two driving gears 2551 and a driven gear 2553 meshing with each other, the two driving gears 2551 being respectively arranged on the outer peripheral walls of the two rotating cylinders 2520, and the driven gear 2553 being located between the two rotating cylinders 2520, each driving gear 2551 meshing with the corresponding driven gear 2553, and the two synchronizing members 252 being capable of synchronously rotating through the synchronous gear assembly 255. In the embodiment, the driven gear 2553 is located on one side of the clearance groove 2528. The driven gear 2553 comprises a rotating shaft 2555 and a gear ring fixedly sleeved on the rotating shaft 2555, and the opposite ends of the rotating shaft 2555 extend out of the opposite ends of the gear ring. In the embodiment, the synchronous gear assembly 255 comprises a pair of driven gears 2553 meshing with each other, and the pair of driven gears 2553 mesh with the two driving gears 2551 respectively.

[0080] As Figure 16 and Figure 17As shown, the limiting mechanism 27 comprises a first rotating cam 271, a first abutting member 272, a second rotating cam 273, a second abutting member 274, and an elastic member 275. The first rotating cam 271 is arranged at one end of the rotating cylinder 2520, and the second rotating cam 273 is arranged at the opposite end of the rotating cylinder 2520. Both the first rotating cam 271 and the second rotating cam 273 are coaxial with the rotating cylinder 2520. The first abutting member 272 is sleeved on the pair of connecting shafts 250 and located at one end of the rotating cylinder 2520. The first abutting member 272 is connected with the rotating cylinder 2520 through the cooperation of the first rotating cam 271 and the first abutting cam. The second abutting member 274 is sleeved on the pair of connecting shafts 250 and located at the opposite end of the rotating cylinder 2520. The second abutting member 274 is connected with the rotating cylinder 2520 through the cooperation of the second rotating cam 273 and the second abutting cam. In this embodiment, the second rotating cam 273 and the driving gear 2551 are located at the same end of the rotating cylinder 2520, and the first rotating cam 271 is located at the end away from the driving gear 2551. The first rotating cam 271, the second rotating cam 273, and the rotating cylinder 2520 on the same rotating cylinder 2520 are coaxial. The first abutting member 272 comprises two first abutting cylinders 2721 located at opposite ends thereof and a first connecting strip 2723 connected between the two first abutting cylinders 2721. The two first abutting cylinders 2721 are respectively sleeved on the two connecting shafts 250 in a sliding manner. Each first abutting cylinder 2721 is provided with a first abutting cam 2725 at the end facing the rotating cylinder 2520. The axis of the first abutting cam 2725 is coaxial with the axis of the first abutting cylinder 2721. The second abutting member 274 comprises two second abutting cylinders 2741 located at opposite ends thereof, a second connecting strip 2743 connected between the two second abutting cylinders 2741, and a support rod 2747. One end of the support rod 2747 is connected to the middle part of the side of the second connecting strip 2743 away from the second abutting cam 2745. The length direction of the support rod 2747 is parallel to the axial direction of the second abutting cylinder 2741. The two second abutting cylinders 2741 are respectively sleeved on the two connecting shafts 250 in a sliding manner. Each second abutting cylinder 2741 is provided with a second abutting cam 2745 at the end facing the rotating cylinder 2520. The axis of the second abutting cam 2745 is coaxial with the axis of the second abutting cylinder 2741.

[0081] Specifically, the first rotating cam 271 comprises a concave-convex surface arranged at one end of the rotating cylinder 2520, and the concave-convex surface comprises first convex portions 2711 and first concave portions 2713 arranged in sequence and spaced along the circumference of the rotating cylinder 2520; the number of the first convex portions 2711 and the number of the first concave portions 2713 can be set as required, for example, the first rotating cam 271 can comprise one first convex portion 2711 and one first concave portion 2713, two first convex portions 2711 and two first concave portions 2713, three first convex portions 2711 and three first concave portions 2713, or four first convex portions 2711 and four first concave portions 2713, etc. In the embodiment, the first rotating cam 271 comprises three first convex portions 2711 and three first concave portions 2713. The first abutting cam 2725 comprises a concave-convex surface arranged at one end of the first abutting cylinder 2721, and the concave-convex surface comprises first convex portions 2725a and first concave portions 2725b arranged in sequence and spaced along the circumference of the first abutting cylinder 2721; the number of the first convex portions 2725a on the first abutting cam 2725 is consistent with the number of the first concave portions 2713 on the first rotating cam 271, and the number of the first concave portions 2725b on the first abutting cam 2725 is consistent with the number of the first convex portions 2711 on the first rotating cam 271, so that the first convex portions 2725a cooperate with the first concave portions 2713, and the first convex portions 2711 cooperate with the first concave portions 2725b. The first abutting cylinder 2721 is provided with a first sliding hole 2724 along the axial direction thereof, and the axis of the first abutting cam 2725 is collinear with the axis of the first sliding hole 2724.

[0082] The second rotating cam 273 comprises a concave-convex surface arranged at one end of the rotating cylinder 2520 away from the first rotating cam 271, and the concave-convex surface comprises second convex portions 2731 and second concave portions 2733 arranged in sequence and spaced apart along the circumference of the rotating cylinder 2520; the number of the second convex portions 2731 and the number of the second concave portions 2733 can be set as required, for example, the second rotating cam 273 can comprise one second convex portion 2731 and one second concave portion 2733, two second convex portions 2731 and two second concave portions 2733, three second convex portions 2731 and three second concave portions 2733, or four second convex portions 2731 and four second concave portions 2733, etc. In the embodiment, the second rotating cam 273 comprises three second convex portions 2731 and three second concave portions 2733. The second abutting cam 2745 comprises a concave-convex surface arranged at one end of the second abutting cylinder 2741, and the concave-convex surface comprises second convex portions 2745a and second concave portions 2745b arranged in sequence and spaced apart along the circumference of the second abutting cylinder 2741; the number of the second convex portions 2745a on the second abutting cam 2745 is consistent with the number of the second concave portions 2733 on the second rotating cam 273, and the number of the second concave portions 2745b on the second abutting cam 2745 is consistent with the number of the second convex portions 2731 on the second rotating cam 273, so that the second convex portions 2745a cooperate with the second concave portions 2733, and the second convex portions 2731 cooperate with the second concave portions 2745b. The second abutting cylinder 2741 is provided with a second sliding hole 2744 along the axial direction thereof, and the axis of the second abutting cam 2745 is collinear with the axis of the second sliding hole 2744. The second connecting strip 2743 is provided with two second support holes 2746 spaced apart therefrom along the axial direction parallel to the second abutting cylinder 2741, and the two second support holes 2746 are respectively located at opposite sides of the support rod 2747.

[0083] The limiting mechanism 27 further comprises elastic members 275 and a positioning pad 276 sleeved on the connecting shaft 250, the elastic members 275 are located between the positioning pad 276 and the second abutting member 274, and the elastic members 275 have elastic force for abutting the first rotating cam 271 and the first abutting cam 2725 against each other and abutting the second rotating cam 273 and the second abutting cam 2745 against each other. In the embodiment, the elastic members 275 are springs, and the number of the elastic members 275 is three. In other embodiments, the elastic members 275 can also be, but are not limited to, elastic rubber, elastic plastic, etc., and the number of the elastic members 275 can also be limited as required. The positioning pad 276 is a strip-shaped piece, and the opposite ends of the positioning pad 276 are respectively provided with second through holes 2762, and the axes of the second through holes 2762 are parallel to the axis of the connecting shaft 250; optionally, the opposite end faces of the positioning pad 276 are arc faces.

[0084] Optionally, the limiting mechanism 27 further comprises a buckle 278 for buckling in the clamping groove 2504 of the shaft body 2501, and opposite ends of the buckle 278 are respectively provided with C-shaped buckles 2782. In other embodiments, the opposite ends of the buckle 278 can also be respectively provided with U-shaped buckles.

[0085] As shown in Figure 10 and Figure 11 , the front surface of the back shell 28 is provided with a positioning space 282, one end of the front surface of the back shell 28 in the positioning space 282 is provided with a clamping groove 284, the bottom surface of the back shell 28 in the positioning space 282 is provided with a fixing column 286, the top surface of the fixing column 286 is provided with a first fixing hole 2862 along the axial direction thereof, and the front surface of the back shell 28 is respectively provided with second fixing holes 2864 at opposite ends of the positioning space 282.

[0086] Please refer to Figures 12-17, when assembling the assisting rotating assembly 23, the two driven gears 2553 are engaged with each other, and the same ends of the rotating shafts 2555 of the two driven gears 2553 are inserted into the two connecting holes 2346 of the base 230 from the end face of the first connecting portion 233; the driving gears 2551 of the two synchronous members 252 are engaged with the two driven gears 2553 respectively, and the two protrusions 2343 are inserted into the two avoiding grooves 2528 respectively, so that the two first rotating cams 271 are accommodated in the two first accommodating spaces 2344 respectively; the first abutting member 272 is accommodated in the second accommodating space 2345 of the base 230, and the two first abutting cams 2725 are matched with the two first rotating cams 271 respectively; the two second abutting cams 2745 of the second abutting member 274 are matched with the two second rotating cams 273 respectively, and the two rotating shafts 2555 are inserted into the two second supporting holes 2746 of the second abutting member 274 respectively; one elastic member 275 is sleeved on the supporting rod 2747, and the ends of the two connecting shafts 250 provided with the clamping grooves 2504 are inserted through the two second through holes 2762 of the positioning pad 276, the two elastic members 275, the two second sliding holes 2744 of the second abutting member 274, the rotating holes 2527 of the two rotating cylinders 2520, the two connecting holes 2346 and the two first sliding holes 2724 of the first abutting member 272 respectively, so that the clamping grooves 2504 of the two connecting shafts 250 are exposed from the side of the first abutting member 272 away from the first abutting cam 2725; the two C-shaped buckles 2782 of the buckle member 278 are clamped into the two clamping grooves 2504 of the two connecting shafts 250 respectively; the rotating portions 2443 of the two rotating members 244 are accommodated in the two assisting spaces 231 of the base 230 respectively, so that the two first circular arc rails 2447 of each rotating portion 2443 are rotatably inserted into the two first circular arc grooves 232 respectively; the two connecting members 242 are arranged on the opposite sides of the base 230 respectively, so that the sliding portions 2442 of the two rotating members 244 are accommodated in the sliding spaces 2421 of the two connecting members 242 respectively, and each sliding rail 2420 is slidably inserted into the corresponding sliding groove 2440; the two movable plates 2524 are rotatably accommodated in the second avoiding spaces 2426 of the two connecting members 242 respectively, so that the two arc-shaped rails 2525 of each movable plate 2524 are rotatably inserted into the two arc-shaped grooves 2425 respectively.

[0087] Please refer to Figures 5-11 and Figures 20-27When assembling the folding device 22, the middle support 263 is covered on the front face of the base 230, the two guide rods 2631 of the middle support 263 are respectively attached to the front face of the two rotating parts 2443, the two first positioning cylinders 2632 are respectively inserted into the two first positioning holes 2310 of the base 230 through the two avoiding openings 2443a of the two rotating parts 244, the fixed block 2633 is positioned in the fixed groove 2332 of the base 230, the positioning hole 2334 is communicated with the corresponding counterbore 2637, the second positioning cylinder 2635 is inserted into the corresponding first through hole 2302, and the plurality of elastic members 275 are respectively accommodated in the plurality of avoiding grooves 2636; two locking members such as screws are respectively locked to the two first positioning cylinders 2632 through the two first positioning holes 2310 of the base 230, and one locking member such as a screw is locked to the second positioning cylinder 2635 through the first through hole 2302 of the second connecting part 234; the base 230 of the assembled assisting rotating assembly 23 is positioned in the positioning space 282 of the back shell 28, so that the end of the base 230 away from the elastic member 275 is clamped in the clamping groove 284, and the fixed column 286 is positioned in the positioning hole 2334 of the base 230, two locking members such as screws are respectively inserted into the two counterbores 2637 of the middle support 263, one of which is locked in the first fixed hole 2862, and the other is locked in the corresponding second fixed hole 2864. Two side supports 262 are respectively placed in two connecting parts 242, so that the two second circular arc rails 2605 of each side support 262 are respectively rotatably inserted in the two second circular arc grooves 2424 of the corresponding connecting part 242, the two second connecting blocks 265 are respectively accommodated in the first avoiding grooves 2427 of the two connecting parts 242, the limiting shafts 2448 of the two rotating parts 244 are respectively slidably accommodated in the limiting grooves 260 of the two side supports 262, the first rolling rod 2522 and the second rolling rod 2523 of each movable plate 2524 are respectively rollingly accommodated in the first rolling groove 2651 and the second rolling groove 2653 of the corresponding second connecting block 265, and the two second positioning blocks 266 are respectively accommodated in the second positioning grooves 2429 of the two side supports 262.

[0088] Because three elastic members 275 are arranged between the positioning pad 276 and the second abutting part 274, the engagement force between the first abutting cam 2725 and the first rotating cam 271 and the engagement force between the second abutting cam 2745 and the second rotating cam 273 can be increased, the friction torque between the first abutting part 272 and the rotating cylinder 2520 and the friction torque between the second abutting part 274 and the rotating cylinder 2520 are increased, the folding or unfolding friction resistance of the folding device 22 is large, and it is convenient for the two rotating mechanisms 24 of the folding device 22 to be positioned at any angle between 0 degrees and 90 degrees relative to the base 230, that is, the two rotating parts 244 can be positioned at any angle between 0 degrees and 90 degrees relative to the base 230.

[0089] Please refer to Figures 1-4 and Figures 20-27 When assembling the electronic device 100, the frame 21 comprises a first front face 211, a first back face 212, two opposite first side faces 214 and two opposite first end faces 215. The first front face 211 is provided with a mounting groove 216 near one side of the folding device 22. The opposite ends of the mounting groove 216 extend to the two first side faces 214 respectively. One side of the mounting groove 216 penetrates the first end face 215 facing the folding device 22. The frame 21 is provided with a mounting portion 217 at the opposite ends of the mounting groove 216. When assembling the folding housing 20, the assembled folding device 22 is placed between the two frames 21. The connecting member 242 on the opposite sides of the folding device 22 is accommodated in the mounting groove 216 of the corresponding frame 21. Each connecting member 242 is fixedly connected to the corresponding mounting portion 217, so that the connecting member 242 is fixedly connected to the frame 21. The connecting member 242 and the mounting portion 217 can be fixedly connected by screwing, buckling, gluing or welding. The rotation track of the connecting member 242 relative to the base 230 is the same as the rotation track of the frame 21 relative to the base 230. The two non-bending areas 43 of the flexible screen 40 are connected to the first front face 211 of the two frames 21 respectively. Specifically, the opposite sides of each non-bending area 43 are connected to the opposite sides of the first front face 211 of the corresponding frame 21 by glue respectively. The front faces of the two side support members 262 are connected to the back face of the bendable area 41 by glue respectively. The glue can be but not limited to glue or double-sided tape.

[0090] Please refer to Figure 1 and Figures 27-39, when the electronic device 100 is folded, a force for folding is applied to at least one of the two frame bodies 21 of the electronic device 100, so that the rotating mechanism 24 connected to the two frame bodies 21 is synchronously rotated relative to the base 230 in a direction of approaching each other through the synchronous gear assembly 255; specifically, one frame body 21 drives the corresponding rotating mechanism 24 to rotate relative to the base 230, so that the sliding rail 2420 of the connecting piece 242 slides in the corresponding sliding groove 2440, the first circular arc rail 2447 of the rotating part 2443 rotates in the first circular arc groove 232 of the base 230, and the limiting shaft 2448 slides to the first limiting end 2601 of the corresponding limiting groove 260 from the second limiting end 2603; at the same time, the arc-shaped rail 2525 of the movable plate 2524 of the synchronous piece 252 rotates in the corresponding arc-shaped groove 2425, the rotating cylinder 2520 of the synchronous piece 252 rotates relative to the base 230 around the corresponding connecting shaft 250, and the first rolling rod 2522 and the second rolling rod 2523 on the synchronous piece 252 roll in the corresponding first rolling groove 2651 and the second rolling groove 2653; the driving gear 2551 on the rotating cylinder 2520 drives the other driven gear 2553 to synchronously rotate, so that the other rotating cylinder 2520 rotates relative to the base 230 around the corresponding connecting shaft 250, so that the sliding rail 2420 of the other connecting piece 242 slides in the corresponding sliding groove 2440, the first circular arc rail 2447 of the other rotating part 2443 rotates in the corresponding first circular arc groove 232 of the base 230, and at the same time, the arc-shaped rail 2525 of the movable plate 2524 of the other synchronous piece 252 rotates in the corresponding arc-shaped groove 2425; so that the two rotating mechanisms 24 are synchronously rotated relative to the base 230 and approach each other, until the folding angle of the rotating part 244 and the connecting piece 242 relative to the base 230 is 90 degrees, and the two side support pieces 262 are respectively folded relative to the base 230 and approach each other with the two rotating parts 244 and the two connecting pieces 242, so that the front surface of the two side support pieces 262 and the front surface of the base 230 form a cross-section in the shape of a water droplet; the foldable area 41 of the flexible screen 40 is folded with the folding device 22, until the foldable area 41 is folded into a water droplet shape, so as to realize the folding of the electronic device 100. At this time, there is a large gap between the rotating part 244 and the flexible screen 40, and the two side support pieces 262 respectively support the flexible screen 40.

[0091] In other folding manners, the two frame bodies 21 can be folded simultaneously, so that the rotating members 244 of the two rotating mechanisms 24 of the folding device 22 are respectively rotated relative to the base 230 to approach each other, the first circular-arc tracks 2447 are rotated in the first circular-arc grooves 232, the sliding tracks 2420 are slid in the corresponding sliding grooves 2440, and the limiting shafts 2448 are slid in the second limiting ends 2603 of the corresponding limiting grooves 260 to the first limiting ends 2601; at the same time, the arc-shaped tracks 2525 of the movable plates 2524 of the two synchronous members 252 are respectively rotated in the corresponding arc-shaped grooves 2425, the two rotating cylinders 2520 are synchronously rotated relative to the base 230 about the two connecting shafts 250, the two rotating mechanisms 24 are respectively rotated relative to the base 230 to approach each other, the two side support members 262 are respectively folded relative to the base 230 with the two rotating mechanisms 24 and the two synchronous members 252 to 90 degrees relative to the base 230, so that the front surfaces of the two side support members 262 and the front surface of the base 230 form a cross-section in the shape of a water droplet; the bendable area 41 of the flexible screen 40 is bent with the folding device 22 until the bendable area 41 is bent in the shape of a water droplet, so as to realize the folding of the electronic equipment 100.

[0092] In the process of unfolding the electronic device 100, the force for unfolding is applied to at least one of the two frame bodies 21 of the electronic device 100, so that the rotating mechanism 24 connected to the two frame bodies 21 is synchronously rotated relative to the base 230 in a direction away from each other through the synchronous gear assembly 255; Specifically, one of the frame bodies 21 drives the corresponding rotating mechanism 24 to rotate relative to the base 230, so that the sliding rail 2420 of the connecting piece 242 slides in the corresponding sliding groove 2440, the first circular arc rail 2447 of the rotating part 2443 rotates in the first circular arc groove 232 of the base 230, and the limiting shaft 2448 slides in the first limiting end 2601 of the corresponding limiting groove 260 to the second limiting end 2603; At the same time, the arc-shaped rail 2525 of the movable plate 2524 of the synchronous piece 252 slides and rotates in the corresponding arc-shaped groove 2425, the rotating cylinder 2520 of the synchronous piece 252 rotates relative to the base 230 around the corresponding connecting shaft 250, and the first rolling rod 2522 and the second rolling rod 2523 on the synchronous piece 252 roll in the corresponding first rolling groove 2651 and the second rolling groove 2653, the driving gear 2551 on the rotating cylinder 2520 drives the other driven gear 2553 to synchronously rotate, so that the other rotating cylinder 2520 rotates relative to the base 230 around the corresponding connecting shaft 250, so that the sliding rail 2420 of the other connecting piece 242 slides in the corresponding sliding groove 2440, the first circular arc rail 2447 of the other rotating part 2443 rotates in the corresponding first circular arc groove 232 of the base 230, and at the same time, the arc-shaped rail 2525 of the movable plate 2524 of the other synchronous piece 252 slides and rotates in the corresponding arc-shaped groove 2425, so that the two rotating mechanisms 24 are synchronously rotated relative to the base 230 to be unfolded, and the two side support pieces 262 are unfolded relative to the base 230 with the two rotating pieces 244 and the two connecting pieces 242 to be coplanar with the front surface of the base 230; The bendable area 41 of the flexible screen 40 is unfolded with the folding device 22 until the flexible screen 40 is completely unfolded, so as to realize the unfolding of the electronic device 100.

[0093] In other folding modes, two frame bodies 21 can be flattened simultaneously, so that the rotating members 244 of the two rotating mechanisms 24 of the folding device 22 are respectively rotated relative to the base 230 to unfold each other, the first circular arc rail 2447 is rotated in the first circular arc slot 232, the sliding rail 2420 is slid in the corresponding sliding slot 2440, and the limiting shaft 2448 is slid in the first limiting end 2601 of the corresponding limiting slot 260 to the second limiting end 2603; at the same time, the arc-shaped rails 2525 of the movable plates 2524 of the two synchronous members 252 are respectively slid and rotated in the corresponding arc-shaped slots 2425, the two rotating cylinders 2520 are respectively rotated relative to the base 230 about the two connecting shafts 250 in synchronization, the two rotating mechanisms 24 are respectively rotated relative to the base 230 to unfold each other, the two side support members 262 are respectively unfolded relative to the base 230 with the two rotating mechanisms 24 and the two synchronous members 252 to the plane of the front surface of the two side support members 262 coplanar with the front surface of the base 230, and the bendable area 41 of the flexible screen 40 is unfolded with the folding device 22 until the bendable area 41 is completely flattened, so as to realize the folding of the electronic device 100.

[0094] In the folding process or unfolding process of the folding device 22, the opposite ends of the elastic member 275 respectively push the second abutting member 274 and the support plate 2771, the positioning pad 276 is rotated relative to the first abutting member 272 with the connecting shaft 250, so that the frictional resistance between the positioning pad 276 and the first abutting member 272, the frictional resistance between the first abutting member 272 and the second abutting member 274 and the connecting cylinder 2520, and the frictional resistance between the damping member 254 and the corresponding connecting member 242 are provided, so that the rotating mechanism 24 is positioned at any angle between 0 degrees and 90 degrees relative to the base 230. Since the side support member 262 is arranged on the lower side of the flexible screen 40 relative to the connecting shaft L of the frame body 21, the side support member 262 is away from the adjacent frame body 21 during the folding process of the folding device 22, so that the flexible screen 40 is displaced relative to the frame body 21, the whole flexible screen 40 is pulled by the side support member 262, so that the gap between the screen surface layer of the flexible screen 40 and the whole screen decoration member is fixed, the movement of the side support member 262 relative to the frame body 21 realizes the effect of the small screen decoration member of the electronic device 100, so as to improve the appearance of the electronic device 100. Since the position of the side support member 262 is fixed relative to the rotating member 244, the position of the side support member 262 after the unfolding of the folding device 22 is consistent with the flexible screen 40, so as to avoid the redundancy of the flexible screen 40 caused by the traditional direction, and the folding effect is optimized.

[0095] When the folding device 22 of the present application is in the folded state, because there is a large gap between the rotating member 244 and the flexible screen 40, when the electronic device 100 is subjected to a drop impact, the rotating member 244 avoids hitting the flexible screen 40, thereby avoiding the problem of failure of the flexible screen 40. In addition, the rotating angle of the rotating member 244 relative to the base 230 is small, so that the overlapping amount of the first circular arc track 2447 and the base 230 is large.

[0096] The above is the implementation of the embodiment of the present application. It should be noted that for those skilled in the art, without departing from the principles of the embodiment of the present application, a number of improvements and refinements can be made, which are also considered within the scope of protection of the present application.

Claims

1. A folding device, characterized in that, The folding device comprises: a base; a rotating mechanism, the rotating mechanism comprising a rotating member and a connecting member, one end of the rotating member being rotatably connected to the base, the end of the rotating member away from the base being slidably connected to the connecting member; a synchronizing mechanism, the synchronizing mechanism comprising a connecting shaft and a synchronizing member, the connecting shaft being connected to the base, one end of the synchronizing member being rotatably connected to the connecting shaft, the end of the synchronizing member away from the connecting shaft being rotatably connected to the connecting member, the axis of the connecting shaft being parallel to the axis between the rotating member and the base; and a supporting mechanism, the supporting mechanism comprising a side supporting member, the side supporting member being rotatably connected to the connecting member, the rotating member being slidably connected to the side supporting member, the synchronizing member being slidably and rotatably connected to the side supporting member; when the folding device is in a folded state, the folding angle of the rotating member relative to the base is consistent with the folding angle of the connecting member relative to the base.

2. The folding device of claim 1, wherein The rotating member and the connecting member are connected through the cooperation of a sliding groove and a sliding rail, the sliding groove being arranged in one of the rotating member and the connecting member, and the sliding rail being arranged in the other one of the rotating member and the connecting member.

3. The folding device of claim 2, wherein The side of the connecting member facing the base is provided with a sliding space, the end of the rotating member away from the base is provided with a sliding part, the sliding part being slidably accommodated in the sliding space, the sliding groove being arranged in one of the inner surfaces of the sliding part and the sliding space, and the sliding rail being arranged in the other one of the inner surfaces of the sliding part and the sliding space.

4. The folding device of claim 3, wherein The opposite sides of the sliding part are respectively provided with the sliding grooves, the opposite inner sides of the sliding space of the connecting member are respectively provided with the sliding rails, and the two sliding rails are respectively slidably accommodated in the two sliding grooves.

5. The folding device of claim 3, wherein The sliding groove is an inclined groove, and the sliding rail is an inclined rail, the length direction of the inclined groove being inclined to the axis direction of the connecting shaft, and the inclined rail being slidably accommodated in the inclined groove.

6. The folding device of claim 3, wherein The sliding groove is an arc-shaped groove, and the sliding rail is an arc-shaped rail, the middle part of the arc-shaped groove being curved towards the side close to the base, and the arc-shaped rail being slidably accommodated in the arc-shaped groove.

7. The folding device of claim 3, wherein The end of the sliding rail close to the side supporting member is provided with a first positioning block, the sliding part is provided with a first positioning groove at one end of the sliding groove, the first positioning groove being communicated with the sliding groove, and when the folding device is in an unfolded state, the first positioning block is positioned in the first positioning groove.

8. The folding apparatus of claim 1, wherein The supporting mechanism further comprises a middle supporting member, the middle supporting member being connected to the front face of the base, the rotating member further comprises a rotating part at the end away from the connecting member, the front face of the base is provided with a rotating assisting space, the rotating part being rotatably accommodated in the rotating assisting space, the middle supporting member covering the rotating part, and the rotating axis of the rotating part relative to the base being parallel to the axis of the connecting shaft.

9. The folding device of claim 8, wherein The opposite ends of the rotating part are respectively provided with first circular arc tracks, the base is respectively provided with first circular arc grooves at the opposite inner end faces of the assisting rotating space, the two first circular arc tracks are respectively rotatably accommodated in the two first circular arc grooves, and the axis of the first circular arc groove is parallel to the axis of the connecting shaft; when the folding device is in the unfolded state, the end face of the rotating part away from the connecting piece, the front face of the middle part supporting piece and the front face of the base are coplanar.

10. The folding apparatus of claim 2, wherein The side part supporting piece and the rotating piece are connected through the cooperation of a limiting groove and a limiting shaft, the limiting groove is arranged on one of the side part supporting piece and the rotating piece, the limiting shaft is arranged on the other one of the side part supporting piece and the rotating piece, and the axis of the limiting shaft is parallel to the axis of the connecting shaft.

11. The folding device of claim 10, wherein The limiting shaft is arranged on one side of the rotating piece close to the sliding groove, the limiting groove is arranged on the side part supporting piece, the limiting groove has a first limiting end and a second limiting end at the opposite ends thereof, the first limiting end is closer to the base than the second limiting end, the limiting shaft is positioned at the second limiting end when the folding device is in the unfolded state, and the limiting shaft is positioned at the first limiting end when the folding device is in the folded state.

12. The folding device of claim 11, wherein, The side part supporting piece comprises a first connecting block, the limiting groove is arranged on one end of the first connecting block close to the base, and one end of the first connecting block away from the base is connected to one side of the connecting piece away from the base through the cooperation of a second circular arc groove and a second circular arc track, and the axis of the second circular arc groove is parallel to the axis of the connecting shaft.

13. The folding device according to claim 12, characterized in that: The side part supporting piece and the synchronizing piece are connected through the cooperation of a rolling groove group and a rolling rod group, the rolling groove group is arranged on one of the side part supporting piece and the synchronizing piece, and the rolling rod group is arranged on the other one of the side part supporting piece and the synchronizing piece.

14. The folding device of claim 13, wherein, The side part supporting piece further comprises a second connecting block, one end of the synchronizing piece away from the connecting shaft is provided with an avoiding opening, the second connecting block is movably accommodated in the avoiding opening, the rolling groove group comprises a first rolling groove arranged on one side of the second connecting block and a second rolling groove arranged on the opposite side of the second connecting block, and the first rolling groove and the second rolling groove are mutually staggered; the rolling rod group comprises a first rolling rod and a second rolling rod, the first rolling rod is arranged on one side of the avoiding opening, the second rolling rod is arranged on the opposite side of the avoiding opening, and the first rolling rod and the second rolling rod are mutually staggered; the first rolling rod is rollingly accommodated in the first rolling groove, and the second rolling rod is rollingly accommodated in the second rolling groove.

15. The folding device of claim 14, wherein, The first rolling groove has a first rolling surface, and the second rolling groove has a second rolling surface; the first rolling surface and the second rolling surface are coplanar, the first rolling rod is rollingly attached to the first rolling surface, and the second rolling rod is rollingly attached to the second rolling surface.

16. The folding apparatus of claim 14, wherein The side part supporting piece further comprises a side part supporting plate, and the first connecting block and the second connecting block are connected to the back face of the side part supporting plate.

17. The folding apparatus of claim 16, wherein, The connecting piece and the synchronization piece are connected by an arc-shaped rail and an arc-shaped slot at one end away from the connecting shaft, the arc-shaped rail is arranged in one of the connecting piece and the synchronization piece, the arc-shaped slot is arranged in the other one of the connecting piece and the synchronization piece, and the middle part of the arc-shaped slot is bent away from the side support plate.

18. The folding apparatus of claim 17, wherein, The front surface of the connecting piece is provided with a second space for avoiding collision, the synchronization piece is slidingly and rotatably accommodated in the second space for avoiding collision at one end away from the connecting shaft, the relative two sides of the synchronization piece at one end away from the connecting shaft are respectively provided with the arc-shaped rail, the relative two inner sides of the connecting piece in the second space for avoiding collision are respectively provided with the arc-shaped slot, the two arc-shaped rails are respectively rotatably accommodated in the two arc-shaped slots, and the space for avoiding collision is located between the two arc-shaped rails.

19. The folding apparatus of claim 16, wherein, The side support further comprises a second positioning block connected to the side support plate, and the front surface of the connecting piece away from the base is provided with a second positioning slot, and when the folding device is in the folded state, the second positioning block is positioned in the second positioning slot.

20. A collapsed housing, characterized by, The folding shell comprises the folding device and two frame bodies, the folding device is located between the two frame bodies, and the connecting piece of the rotating mechanism is fixedly connected to the frame bodies.

21. An electronic device, comprising: The electronic device comprises a flexible screen and the folding shell, the flexible screen comprises a bendable area and two non-bendable areas, the bendable area is located between the two non-bendable areas, the front surface of the side support of the folding shell is connected to the back surface of the bendable area, and the non-bendable areas are connected to the front surfaces of the frame bodies.

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