Folding apparatus, foldable housing, and electronic device

Abstract

A folding apparatus, a foldable housing comprising the folding apparatus, and an electronic device. The folding apparatus is arranged between two frames; the folding apparatus comprises a back shell and a support mechanism which are located between the two frames; a limiting mechanism comprises a first limiting member and a second limiting member; the first limiting member is connected to the back shell; the second limiting member is connected to the frames; the first limiting member comprises a first limiting portion; the second limiting member comprises a second limiting portion; and when the folding apparatus is in a fully folded state, the first limiting portion directly faces the second limiting portion, and there is a gap between the first limiting portion and the second limiting portion.

Description

Folding device, folding housing and electronic device

[0001] The present application claims priority to the application for patent filed on September 14, 2024 with the China Patent Office and application number 2024112969838, entitled "Folding device, folding housing and electronic device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of electronic devices, in particular to a folding device for supporting a flexible screen, a folding housing provided with the folding device, and an electronic device provided with the folding housing. BACKGROUND

[0003] With the development of display devices, flexible display screens that can be folded have appeared. Folding screen devices equipped with flexible display screens that can be folded are increasingly popular due to their unique design and diverse functions. In related technologies, the hinge scheme or the shaft scheme of the folding screen device can fold the flexible display screen that can be folded into two shapes, "U" shape or "water drop" shape. The principle and mechanism of the "U" shape shaft scheme are simple, the number of parts is small, and the reliability is high. However, the whole machine is wedge-shaped after folding and closing, which is thick and not beautiful. The "water drop" shaft scheme is more beautiful after folding, with two housings parallel and closed tightly. However, the movement principle and mechanism are complex, and the number of parts is large. Under the trend of thinning the whole machine, the reliability of the whole machine of the "water drop" scheme, especially in the drop scenario, becomes a research and development difficulty. SUMMARY

[0004] The folding device provided by the present application is arranged between two frames. The folding device includes a back shell and a supporting mechanism between the two frames. The limiting mechanism includes a first limiting piece and a second limiting piece. The first limiting piece is connected to the back shell, and the second limiting piece is connected to the frame. The first limiting piece includes a first limiting part, and the second limiting piece includes a second limiting part. When the folding device is in a completely folded state, the first limiting part is directly opposite the second limiting part, and the first limiting part and the second limiting part have a gap.

[0005] The application further provides a folding shell, which comprises a folding device and two frame bodies, the folding device is located between the two frame bodies, the folding device comprises a back shell and a limiting mechanism located between the two frame bodies, the limiting mechanism comprises a first limiting piece and a second limiting piece, the first limiting piece is connected to the back shell, the second limiting piece is connected to the frame body, the first limiting piece comprises a first limiting part, the second limiting piece comprises a second limiting part; when the folding device is in a completely folded state, the first limiting part is opposite to the second limiting part, the first limiting part and the second limiting part have a gap, and the connecting piece and the second limiting piece of the folding device are fixedly connected to the frame body.

[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 back shell and a limiting mechanism located between the two frame bodies, the limiting mechanism comprises a first limiting piece and a second limiting piece, the first limiting piece is connected to the back shell, the second limiting piece is connected to the frame body, the first limiting piece comprises a first limiting part, the second limiting piece comprises a second limiting part; when the folding device is in a completely folded state, the first limiting part is opposite to the second limiting part, the first limiting part and the second limiting part have a gap, and the second limiting piece is fixedly connected to the frame body; the two non-bendable areas are connected to the front faces of the two frame bodies of the folding shell respectively, and the bendable area is opposite to the front face of the folding device of the folding shell. BRIEF DESCRIPTION OF DRAWINGS

[0007] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0008] Fig. 1 is a perspective structural schematic view of an electronic device in a first embodiment of the application;

[0009] Fig. 2 is a perspective structural exploded schematic view of the electronic device in Fig. 1;

[0010] Fig. 3 is a perspective structural exploded schematic view of a folding shell in Fig. 2;

[0011] Fig. 4 is a perspective structural exploded schematic view of a folding device in Fig. 3;

[0012] Fig. 5 is a perspective structural schematic view of the folding device in Fig. 4 from another perspective;

[0013] Fig. 6 is an enlarged view of the partial back shell and the limiting mechanism in Fig. 4;

[0014] Fig. 7 is an enlarged view of the partial back shell and the limiting mechanism in Fig. 5;

[0015] Fig. 8 is a further exploded view of the folding device in Fig. 4;

[0016] Fig. 9 is a further exploded view of the folding device in Fig. 5;

[0017] Fig. 10 is an enlarged view of portion X in Fig. 2;

[0018] Fig. 11 is an enlarged view of portion XI in Fig. 3;

[0019] Fig. 12 is a perspective view of the folding shell in Fig. 2;

[0020] Fig. 13 is a sectional view of the folding shell in Fig. 12;

[0021] Fig. 14 is an enlarged view of portion XIV in Fig. 13;

[0022] Fig. 15 is a front view of the folding shell in Fig. 2;

[0023] Fig. 16 is an enlarged view of portion XVI in Fig. 15;

[0024] Fig. 17 is a perspective view of the folding shell in Fig. 2 in one of the folded states;

[0025] Fig. 18 is a further exploded view of the folding shell in Fig. 17;

[0026] Fig. 19 is a partial perspective sectional view of the folding shell in Fig. 17;

[0027] Fig. 20 is a sectional view of the folding shell in Fig. 19;

[0028] Fig. 21 is a perspective view of the folding shell in Fig. 2 in the fully folded state;

[0029] Fig. 22 is a further exploded view of the folding shell in Fig. 21;

[0030] Fig. 23 is an enlarged view of a portion of the folding shell in Fig. 21;

[0031] Fig. 24 is a partial perspective sectional view of the folding shell in Fig. 21;

[0032] Fig. 25 is a further partial perspective sectional view of the folding shell in Fig. 22;

[0033] Fig. 26 is a perspective view of a folding case according to the second embodiment of the present application;

[0034] Fig. 27 is an enlarged view of a portion XXVII in Fig. 26;

[0035] Fig. 28 is a perspective view of a folding device according to the second embodiment of the present application;

[0036] Fig. 29 is an enlarged view of a portion of one of the connecting members in Fig. 28;

[0037] Fig. 30 is a front view of the folding case according to the second embodiment of the present application;

[0038] Fig. 31 is an enlarged view of a portion XXXI in Fig. 30;

[0039] Fig. 32 is a perspective view of a portion of the folding case according to the second embodiment of the present application;

[0040] Fig. 33 is a perspective view of the folding case according to the second embodiment of the present application;

[0041] Fig. 34 is a sectional view of the folding case according to the second embodiment of the present application.

[0042] Main label explanation: 100, electronic device; 20, folding shell; 21, frame; 211, front; 212, back; 214, end face; 215, side; 216, mounting groove; 217, mounting part; 218, fixing groove; 219, locking hole; 22, folding device; 221, positioning piece; 2212, fixed part; 2214, positioning part; 2215, positioning hole; 2216, fixing hole; 23, back shell; 231, positioning groove; 232, positioning port; 233, positioning space; 2331, first circular arc groove; 2333, first accommodation groove; 2335, second accommodation groove; 2336, fixed cylinder; 2337, first fixing hole; 24, rotating mechanism; 242, connecting piece; 2420, first sliding groove; 2422, avoiding groove; 2423, stop block; 2425, sliding assisting space; 2427, second circular arc groove; 2428, mounting block; 244, rotating piece; 2440, first circular arc rail; 2441, first sliding groove; 2442, first rotating part; 2443, second sliding groove; 2444, first sliding part; 2445, first sliding rail; 2448, limiting shaft; 25, limiting mechanism; 251, first limiting piece; 2510, first limiting part; 2511, positioning block; 2512, positioning protrusion; 2513, first limiting surface; 2515, outer side surface; 2516, first connecting block; 253, second limiting piece; 2530, second limiting part; 2533, second limiting surface; 2534, stop surface; 2535, second connecting block; 2536, limiting block; 2537, stop piece; 2538, supporting surface; 26, supporting mechanism; 262, middle supporting piece; 2621, middle supporting plate; 2623, fixed area; 2624, guide rotating strip; 2625, positioning cylinder; 2627, counterbore; 264, side supporting piece; 2641, side supporting plate; 2642, connecting block; 2643, second circular arc rail; 2647, rolling block; 2648, limiting groove; 27, synchronization mechanism; 270, connecting shaft; 2701, shaft body; 2703, stop cap; 2705, clamping groove; 272, synchronization piece; 2720, first sliding rod; 2721, second rotating part; 2725, second sliding part; 2726, second sliding rail; 2727, second sliding rod; 275, synchronization gear assembly; 2751, driving gear; 2753, driven gear; 2754, rotating shaft; 28, damping mechanism; 281, abutting piece; 2812, abutting cylinder; 2814, connecting hole; 282, first rotating cam; 283, first abutting cam; 284, second rotating cam; 285, elastic piece; 286, second abutting cam; 288, supporting rod; 287, buckle; 30, flexible screen; 31, bendable area; 33, non-bendable area. DETAILED DESCRIPTION

[0043] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. 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 those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0044] In addition, the descriptions of the following embodiments are made with reference to the accompanying 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 accompanying drawings, and therefore, the directional terms used are for better, clearer and more understandable description and understanding of the present application, and are not intended to indicate or imply 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. The term "natural state" refers to the state of a device or element under no external force, such as tension or pressure.

[0045] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "arrangement on" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those 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.

[0046] In one aspect, the present application provides a folding device arranged between two frame bodies, the folding device comprising:

[0047] a back shell located between the two frame bodies;

[0048] and

[0049] a limiting mechanism comprising a first limiting member and a second limiting member, the first limiting member being connected to the back shell, the second limiting member being connected to the frame body, the first limiting member comprising a first limiting portion, the second limiting member comprising a second limiting portion; when the folding device is in a fully folded state, the first limiting portion is directly opposite the second limiting portion, and the first limiting portion and the second limiting portion have a gap.

[0050] Optionally, the end of the back shell and the first limiting member are connected through the cooperation of a positioning groove and a positioning block, the positioning groove being arranged in one of the back shell and the first limiting member, and the positioning block being arranged in the other one of the back shell and the first limiting member.

[0051] Optionally, the first limiting part is a limiting plate arranged at one end of the first limiting member away from the back shell, and the second limiting part is a limiting groove arranged at one end of the second limiting member facing the back shell; or the first limiting part is a limiting groove arranged at one end of the first limiting member away from the back shell, and the second limiting part is a limiting plate arranged at one end of the second limiting member facing the back shell.

[0052] Optionally, the first limiting part has a first limiting surface away from the back shell, the first limiting surface is inclined to the length direction of the back shell, the second limiting part has a second limiting surface facing the first limiting member, when the folding device is in the fully folded state, the first limiting surface is opposite to the second limiting surface, and the first limiting surface and the second limiting surface have a gap therebetween; the first limiting surface can be attached to the second limiting surface, so that the first limiting part is positioned at the second limiting part.

[0053] Optionally, the limiting groove further has a stop surface connected to the second limiting surface, the second limiting surface is inclined to the stop surface, and the second limiting surface and the stop surface enclose the limiting groove.

[0054] Optionally, the shape of the outer surface of the side of the limiting plate away from the back shell is consistent with the shape of the inner surface of the limiting groove.

[0055] Optionally, when the folding device is in the fully folded state, the limiting plate is opposite to the limiting groove, and the surface of the limiting plate away from the back shell has a gap with the inner surface of the limiting groove.

[0056] Optionally, the first limiting member further comprises a first connecting block, the first limiting part is arranged at one side of the first connecting block away from the back shell, the side of the first connecting block away from the first limiting part is provided with the positioning block, and the end of the back shell is provided with the positioning groove; when the positioning block is positioned in the positioning groove, the end surface of the back shell is coplanar with the side surface of the first limiting part away from the back shell.

[0057] Optionally, the second limiting member further comprises a second connecting block connected to the frame body and a limiting block, one end of the limiting block connected to the second connecting block faces the back shell, the end surface of the limiting block away from the second connecting block is provided with a limiting groove, and the first limiting part is a limiting plate arranged at one end of the first limiting member away from the back shell.

[0058] Optionally, the second limiting member further comprises a stop piece, one end of the stop piece is connected to the second connecting block, and the stop piece is connected to the limiting block, and the stop surface is connected to the side surface of the stop piece.

[0059] Optionally, the folding device further comprises a rotating mechanism connected between the back shell and the frame, the rotating mechanism comprising a connecting member connected to the frame, the connecting member being integrally formed with the second limiting member.

[0060] Optionally, the back shell is provided with the rotating mechanism on opposite sides thereof, the end of the connecting member of each rotating mechanism is provided with the second limiting member, and the opposite ends of the first limiting portion are close to the opposite sides of the back shell; when the folding device is in the unfolded state, the two second limiting members are located at the opposite ends of the first limiting portion; when the folding device is in the fully folded state, the two second limiting portions are respectively opposite to the opposite ends of the first limiting portion, and each second limiting portion has a gap with the corresponding first limiting portion.

[0061] In another aspect, the application also provides a folding shell, which comprises a folding device and two frames, the folding device being located between the two frames, the folding device comprising a back shell and a limiting mechanism, the back shell being located between the two frames; the limiting mechanism comprising a first limiting member and a second limiting member, the first limiting member being connected to the back shell, the second limiting member being connected to the frame, the first limiting member comprising a first limiting portion, and the second limiting member comprising a second limiting portion; when the folding device is in the fully folded state, the first limiting portion is opposite to the second limiting portion, the first limiting portion has a gap with the second limiting portion, and the second limiting member of the folding device is fixedly connected to the frame.

[0062] Optionally, the frame is provided with a fixing groove on the front side of the side close to the folding device, and the second limiting member is located in the fixing groove.

[0063] Optionally, the frame is provided with a mounting groove on the front side of the side close to the folding device, the opposite ends of the mounting groove are close to the opposite end faces of the frame, one side of the mounting groove penetrates through the frame and faces the side of the folding device, the fixing groove is close to the end face of the frame, the mounting groove communicates with the fixing groove, and the connecting member of the folding device is located in the mounting groove.

[0064] In another aspect, the present application also 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 back shell and a limiting mechanism, the back shell is located between the two frame bodies; the limiting mechanism comprises a first limiting member and a second limiting member, the first limiting member is connected to the back shell, the second limiting member is connected to the frame body, the first limiting member comprises a first limiting part, and the second limiting member comprises a second limiting part; when the folding device is in a completely folded state, the first limiting part is opposite to the second limiting part, the first limiting part and the second limiting part have a gap, and the second limiting member of the folding device is fixedly connected to the frame body; the two non-bendable areas are respectively connected to the front surfaces of the two frame bodies of the folding shell, and the bendable area is opposite to the front surface of the folding device of the folding shell.

[0065] Please refer to FIGS. 1-3, the electronic device 100 in the first embodiment of the present application comprises a folding shell 20 and a flexible screen 30 arranged on the folding shell 20, the folding shell 20 comprises two frame bodies 21 and a folding device 22 arranged between the two frame bodies 21, the opposite sides of the folding device 22 are respectively connected to the two frame bodies 21; the flexible screen 30 comprises a bendable area 31 and two non-bendable areas 33, the bendable area 31 is located between the two non-bendable areas 33, the flexible screen 30 covers the front surface of the folding shell 20, the two non-bendable areas 33 can be respectively connected to the front surfaces of the two frame bodies 21, the bendable area 31 is opposite to the front surface of the folding device 22, and the bendable area 31 of the flexible screen 30 can be bent or flattened along with the folding device 22.

[0066] As shown in FIG. 4 and FIG. 5, the folding device 22 comprises a back cover 23 between the two frame bodies 21, an assisting assembly arranged between the back cover 23 and the supporting mechanism 26, a limiting mechanism 25 and a supporting mechanism 26; the assisting assembly comprises a rotating mechanism 24, a synchronous mechanism 27 and a damping mechanism 28; the rotating mechanism 24 is connected between the back cover 23 and the frame body 21; specifically, 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 back cover 23; the other end of the rotating piece 244 away from the back cover 23 is slidably connected to the connecting piece 242; the connecting piece 242 is connected to the frame body 21; the limiting mechanism 25 comprises a first limiting piece 251 and a second limiting piece 253; the first limiting piece 251 is connected to the back cover 23; the second limiting piece 253 is connected to the frame body 21; that is, the second limiting piece 253 and the connecting piece 242 on the same side of the back cover 23 are fixedly connected to the same frame body 21; the first limiting piece 251 comprises a first limiting portion 2510; the second limiting piece 253 comprises a second limiting portion 2530; when the folding device 22 is in a completely folded state, the first limiting portion 2510 faces the second limiting portion 2530, and there is a gap between the first limiting portion 2510 and the second limiting portion; when the folding device 22 is in a flat state, the second limiting piece 253 is located at the side of the back cover 23. In this embodiment, the number of the assisting assemblies between the back cover 23 and the supporting mechanism 26 is two; the two assisting assemblies are respectively located at the opposite ends of the front of the back cover 23. In other embodiments, the number of the assisting assemblies between the back cover 23 and the supporting mechanism 26 can be only one; preferably, the assisting assembly is located at the middle of the front of the back cover 23. In other embodiments, the number of the assisting assemblies between the back cover 23 and the supporting mechanism 26 can be three or more; the three or more assisting assemblies are arranged at intervals along the length direction of the back cover.

[0067] Optionally, at least one end of the back cover 23 is provided with a limiting mechanism 25; the first limiting piece 251 is connected to the end of the front of the back cover 23; the second limiting piece 253 is connected to the end of the connecting piece 242 through the frame body 21; the first limiting piece 251 and the second limiting piece 253 are located at the same end of the folding device 22. In this embodiment, the back cover 23 is a strip-shaped frame; the opposite ends of the front of the back cover 23 are respectively provided with a limiting mechanism 25; the first limiting piece 251 of the two limiting mechanisms 25 is respectively connected to the opposite ends of the front of the back cover 23; the second limiting piece 253 of the two limiting mechanisms 25 is respectively connected to the corresponding connecting piece 242; when the folding device 22 is in a completely folded state, the two second limiting pieces 253 respectively face the two first limiting pieces 251; and there is a gap between each first limiting piece 251 and the corresponding second limiting piece 253; that is, the first limiting piece 251 will not contact the second limiting piece 253 during the folding process or the flattening process of the folding device 22, and mechanical noise will not occur.

[0068] It can be understood that the front face refers to the face with the same light-emitting face of the flexible screen 30, and the back face refers to the face with the light-emitting face of the flexible screen 30 facing away. The flexible screen 30 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, and the like. The electronic device 100 can be a mobile phone, a tablet computer, or a computer, and can also be used on other non-electronic products requiring the folding device 22. The frame 21 can be placed with a battery, a PCB assembly, a loudspeaker, a receiver, a camera, or a key, and the electronic devices between the two frames 21 are electrically connected through a flexible circuit board passing through the folding device 22. The "connection" in the description of the embodiments of the present application 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.

[0069] The first limiting member 251 of the folding device 22 of the present application is connected to the back shell 23, the second limiting member 253 is connected to the connecting member 242, and the connecting member 242 is connected to the frame 21; when the electronic device 100 is in a fully folded state, that is, the folding device 22 is fully folded, the first limiting member 251 is opposite to the second limiting member 253, and there is a gap between the first limiting member 251 and the second limiting member 253; when the electronic device 100 falls, the impact force generated by the collision of the back shell 23 with the ground is conducted to the first limiting member 251 through the back shell 23, and since there is a gap between the first limiting member 251 and the second limiting member 253, the back shell 23 and the first limiting member 251 move towards the second limiting member 253, thereby releasing a part of the impact force, and since the impact force conducted by the first limiting member 251 to the second limiting member 253 is small, the deformation movement of the frame 21 is reduced, and the deformation movement of the flexible screen 30 connected to the frame 21 is avoided to avoid damage.

[0070] As shown in FIG. 4 and FIG. 5, the end of the back shell 23 is connected with the first limiting member 251 through the cooperation of a positioning groove and a positioning block, the positioning groove is arranged in one of the back shell 23 and the first limiting member 251, and the positioning block is arranged in the other one of the back shell 23 and the first limiting member 251; the second limiting member 253 is connected to the end of the connecting member 242 away from the back shell 23. As shown in FIG. 6 and FIG. 7, the front end of the back shell 23 is provided with a positioning groove 231, and the back surface of the first limiting member 251 is provided with a positioning block 2511, the positioning block 2511 is positioned in the positioning groove 231, so that the first limiting member 251 is fixedly connected to the back shell 23. In the embodiment, the front end of the back shell 23 is provided with two positioning grooves 231, and the back surface of the first limiting member 251 is provided with two positioning blocks 2511, the two positioning blocks 2511 are positioned in the two positioning grooves 231, respectively, so that the two first limiting members 251 are positioned at the opposite ends of the front end of the back shell 23, respectively. In the embodiment, the length direction of the positioning groove 231 is perpendicular to the length direction of the back shell 23.

[0071] In other embodiments, the end of the front end of the back shell 23 is provided with a positioning block, the back surface of the first limiting member 251 is provided with a positioning groove, the positioning block is positioned in the positioning groove, so that the first limiting member 251 is fixedly connected to the back shell 23; specifically, the opposite ends of the front end of the back shell 23 are provided with two positioning blocks, respectively, the back surface of the first limiting member 251 is provided with two positioning grooves, respectively, the two positioning blocks are positioned in the two positioning grooves, respectively, so that the two first limiting members 251 are positioned at the opposite ends of the front end of the back shell 23, respectively.

[0072] In other embodiments, the first limiting member 251 and the back shell 23 can also be connected through, but not limited to, gluing, screwing and the like.

[0073] Optionally, the outer periphery of the positioning block 2511 and the inner periphery of the positioning groove 231 can be fixed through the cooperation of a clamping block and a clamping groove, the clamping block is arranged in one of the outer periphery of the positioning block 2511 and the inner periphery of the positioning groove 231, and the clamping groove is arranged in the other one of the outer periphery of the positioning block 2511 and the inner periphery of the positioning groove 231. In other embodiments, the outer periphery of the positioning block 2511 and the inner periphery of the positioning groove 231 are provided with glue.

[0074] As shown in FIG. 6 and FIG. 7, the front end of the back shell 23 is provided with a positioning port 232 on one side of the positioning groove 231, the positioning port 232 communicates with the positioning groove 231; the back surface of the first limiting member 251 is provided with a positioning protrusion 2512 on one side of the positioning block 2511, when the first limiting member 251 is fixedly connected to the back shell 23, the positioning protrusion 2512 is clamped in the positioning port 232. In the embodiment, the front end of the back shell 23 is provided with two positioning ports 232, respectively, the two positioning ports 232 communicate with the two positioning grooves 231, respectively, and the positioning protrusions 2512 of the two first limiting members 251 are positioned in the two positioning ports 232, respectively.

[0075] As shown in FIG. 4 and FIG. 5, the front surface of the back shell 23 is provided with two positioning spaces 233, and two assisting components are positioned in the two positioning spaces 233 respectively; the rotating member 244 is rotatably connected with the back shell 23 through the cooperation of a first circular arc track and a first circular arc groove, the first circular arc track is arranged on one of the rotating member 244 and the back shell 23, and the first circular arc groove is arranged on the other one of the rotating member 244 and the back shell 23; in the embodiment, the front surface of the back shell 23 is provided with the first circular arc groove 2331 on the opposite sides of each positioning space 233 respectively, and the end of the rotating member 244 away from the corresponding connecting member 242 is provided with the first circular arc track 2440. The back shell 23 is provided with the first receiving groove 2333 and the second receiving groove 2335 in each positioning space 233, the first receiving groove 2333 is used for receiving the synchronous mechanism 27, and the second receiving groove 2335 is used for receiving the damping mechanism 28; the bottom surface of the back shell 23 in the positioning space 233 is provided with a plurality of fixed cylinders 2336 which are spaced from each other, and the top surface of the fixed cylinder 2336 is provided with the first fixed hole 2337 along the axial direction thereof.

[0076] As shown in FIG. 6 and FIG. 7, the first limiting part 2510 is a limiting plate arranged on the end of the first limiting member 251 away from the back shell 23, and the second limiting part 2530 is a limiting groove arranged on the end of the second limiting member 253 facing the back shell 23; or the first limiting part 2510 is a limiting groove arranged on the end of the first limiting member 251 away from the back shell 23, and the second limiting part 2530 is a limiting plate arranged on the end of the second limiting member 253 facing the back shell 23. The length direction of the limiting plate is perpendicular to the length direction of the back shell 23, and the opposite ends of the limiting plate are close to the opposite sides of the back shell 23 respectively, and the length direction of the limiting groove is parallel to the length direction of the limiting plate. When the folding device 22 is in the completely folded state, the limiting plate faces the limiting groove, that is, the two first limiting parts 2510 face the two second limiting parts 2530 respectively, the orthographic projection of each first limiting part 2510 is located on the inner surface of the corresponding limiting groove, and the surface of each limiting plate away from the back shell 23 has a gap with the inner surface of the corresponding limiting groove.

[0077] Optionally, the first limiting part 2510 has a first limiting surface 2513 facing away from the back shell 23, the first limiting surface 2513 is inclined to the length direction of the back shell 23, and the first limiting surface 2513 faces away from the rotating member 244; the second limiting part 2530 has a second limiting surface 2533 facing the first limiting part 2510, and the second limiting surface 2533 faces the rotating member 244; when the folding device 22 is in the fully folded state, the first limiting surface 2513 directly faces the second limiting surface 2533, and the first limiting surface 2513 and the second limiting surface 2533 have a gap therebetween. It can be understood that the first limiting surface 2513 is arranged on the surface of the limiting plate facing away from the back shell 23, the first limiting surface 2513 is inclined to the length direction of the limiting plate, and the second limiting surface 2533 is arranged on the inner surface of the limiting groove. Preferably, the first limiting surface 2513 is parallel to the second limiting surface 2533. When the back shell 23 is impacted, the first limiting part 2510 approaches the second limiting part 2530, and the first limiting surface 2513 can be attached to the second limiting surface 2533, so that the first limiting part 2510 is positioned in the second limiting part 2530, that is, the first limiting part 2510 is positioned in the limiting groove of the second limiting part 2530.

[0078] Optionally, the second limiting part 2530 further has a stop surface 2534 connected to the second limiting surface 2533, the second limiting surface 2533 is inclined to the stop surface 2534, the second limiting surface 2533 and the stop surface 2534 form the limiting groove, and the second limiting surface 2533 is closer to the rotating member than the stop surface 2534. The included angle between the second limiting surface 2533 and the stop surface 2534 is greater than 0 degrees and less than 180 degrees, and preferably, the included angle between the second limiting surface 2533 and the stop surface 2534 is between 60 degrees and 150 degrees. In other embodiments, the limiting groove can be, but is not limited to, a circular arc groove. The first limiting part 2510 further has an outer side surface 2515 facing away from the rotating member, and when the positioning block 2511 is positioned in the positioning groove 231, the outer side surface 2515 is coplanar with the end surface of the back shell 23.

[0079] Optionally, the shape of the outer surface of the side of the first limiting part 2510 facing away from the back shell 23 is consistent with the shape of the inner surface of the limiting groove, so that the side of the first limiting part 2510 facing away from the back shell 23 can be clamped into the limiting groove, to prevent the first limiting part 2510 from being separated from the limiting groove and prevent the two frame bodies 21 from being pulled apart to damage the flexible screen 30. That is, the shape of the outer surface of the side of the limiting plate facing away from the back shell is consistent with the shape of the inner surface of the corresponding limiting groove, so that the side of the limiting plate facing away from the back shell can be clamped into the limiting groove.

[0080] As shown in FIGS. 3-4 and 6-7, the first limiting member 251 further comprises a first connecting block 2516, the first limiting portion 2510 is arranged on a side of the first connecting block 2516 away from the back shell 23, the positioning block 2511 and the positioning protrusion 2512 are arranged on a side of the first connecting block 2516 away from the first limiting portion 2510, the surface of the positioning block 2511 away from the rotating member 244, the surface of the first connecting block 2516 away from the rotating member 244, and the surface of the first limiting portion 2510 away from the rotating member 244 are coplanar. The second limiting member 253 further comprises a second connecting block 2535 connected to the frame 21, a limiting block 2536, and a stop sheet 2537, the limiting block 2536 is connected to an end of the second connecting block 2535 facing the back shell 23, the limiting groove is arranged on an end surface of the limiting block 2536 away from the second connecting block 2535, one end of the stop sheet 2537 is connected to the second connecting block 2535, and the stop sheet 2537 is connected to the limiting block 2536, the stop sheet 2537 is located on one side of the second limiting portion 2530, and the stop surface 2534 is connected to a side surface of the stop sheet 2537. The length direction of the limiting groove is parallel to the length direction of the stop sheet 2537, and the stop sheet 2537 has a support surface 2538 away from the back shell 23. In this embodiment, the second connecting block 2535 and the connecting member 242 on the same side of the back shell 23 are both fixedly connected to the frame 21, so that the second connecting block 2535 and the connecting member 242 are connected to each other through the frame 21.

[0081] As shown in FIG. 8 and FIG. 9, in the embodiment, the opposite sides of the back shell 23 are respectively provided with rotating mechanisms 24, one rotating mechanism 24 of which has a rotating piece 244 rotatably connected to one side of the back shell 23, and the other rotating mechanism 24 has a rotating piece 244 rotatably connected to the opposite side of the back shell 23; the end of the connecting piece 242 of each rotating mechanism 24 is connected with a second limiting piece 253, and the opposite ends of the first limiting part 2510 are respectively close to the opposite sides of the back shell 23; when the folding device 22 is in the unfolded state, the two second limiting pieces 253 are located at the opposite ends of the first limiting piece 251; when the folding device 22 is in the completely folded state, the two second limiting pieces 253 are respectively opposite to the opposite ends of the first limiting part 2510, and each second limiting piece 253 has a gap with the first limiting part 2510. Specifically, the end of the rotating piece 244 away from the connecting piece 242 is connected with the back shell 23 through the cooperation of a first circular arc track and a first circular arc groove, the first circular arc track is arranged on one of the rotating piece 244 and the back shell 23, the first circular arc groove is arranged on the other one of the rotating piece 244 and the back shell 23, and the rotation axis of the first circular arc track and the first circular arc groove is parallel to the length direction of the back shell 23. In the embodiment, the opposite sides of each limiting space 233 of the back shell 23 are respectively provided with first circular arc grooves 2331, and the axes of the two first circular arc grooves 2331 are parallel to each other; the end of the rotating piece 244 away from the connecting piece 242 is provided with first circular arc tracks 2440, and the two first circular arc tracks 2440 are rotatably accommodated in the two first circular arc grooves 2331 respectively.

[0082] Specifically, the rotating piece 244 includes a first rotating part 2442 and a first sliding part 2444, the first rotating part 2442 is arranged at one end of the rotating piece 244, the first sliding part 2444 is arranged at the opposite end of the rotating piece 244, the two first circular arc tracks 2440 are arranged at the opposite ends of the first rotating part 2442, the axes of the two first circular arc tracks 2440 are coaxial, and the two first circular arc tracks 2440 are rotatably accommodated in the first circular arc grooves 2331. In other embodiments, the opposite sides of each limiting space 233 of the back shell 23 are respectively provided with first circular arc tracks, the opposite sides of the first rotating part 2442 are respectively provided with first circular arc grooves, and the two first circular arc tracks are rotatably accommodated in the two first circular arc grooves respectively.

[0083] The first sliding rail is arranged on one of the rotating member 244 and the connecting member 242, and the first sliding groove is arranged on the other one of the rotating member 244 and the connecting member 242. In the embodiment, the first sliding part 2444 is provided with the first sliding rail 2445 at one end away from the first rotating part 2442, and one end of the connecting member 242 is provided with the first sliding groove 2420, and the first sliding rail 2445 is slidably accommodated in the first sliding groove 2420. Specifically, the first sliding groove 2420 is inclined relative to the length direction of the connecting member 242, the opposite ends of the first sliding rail 2445 extend out of the opposite ends of the first sliding part 2444 respectively, and the first sliding groove 2420 is an inclined groove arranged on the side of the connecting member 242 facing the connecting member 242, and the opposite sides of the first sliding groove 2420 pass through the front face and the back face of the connecting member 242 respectively. Further, the side of the connecting member 242 facing the rotating member 244 is provided with the avoiding groove 2422 communicating with the first sliding groove 2420, and the avoiding groove 2422 is used for avoiding the first sliding part 2444; the front face of the connecting member 242 is provided with the stop block 2423 protruding towards the first sliding groove 2420, and the front face of the first sliding part 2444 is provided with the stop groove 2423 opposite to the stop block 2423; when the first sliding rail 2445 is accommodated in the first sliding groove 2420, the stop block 2423 is accommodated in the stop groove to prevent the rotating member 244 from being separated from the connecting member 242.

[0084] In other embodiments, the side of the first sliding part 2444 facing the connecting member 242 is provided with the first sliding groove, and one end of the connecting member 242 is provided with the first sliding rail on the side facing the rotating member 244, and the first sliding rail is slidably accommodated in the first sliding groove.

[0085] As shown in FIG. 8 and FIG. 9, the synchronous mechanism 27 comprises connecting shafts 270 and synchronous pieces 272, the connecting shafts 270 are connected to the back shell 23, the axis of the connecting shafts 270 is parallel to the rotation axis between the rotating piece 244 and the back shell 23, the synchronous pieces 272 comprise second rotating parts 2721 and second sliding parts 2725 at opposite ends thereof, the second rotating parts 2721 are rotatably sleeved on the connecting shafts 270, and the second sliding parts 2725 are slidingly connected to the connecting piece 242. In the embodiment, the synchronous mechanism 27 comprises two connecting shafts 270 and two synchronous pieces 272, the two connecting shafts 270 are parallelly positioned at opposite sides of the front face of the back shell 23 through positioning pieces 221, and the two synchronous pieces 272 are rotatably connected to the two connecting shafts 270, respectively. Specifically, the positioning piece 221 comprises a rectangular fixed part 2212 and two positioning parts 2214, the fixed part 2212 is connected to the back shell 23, the two positioning parts 2214 are connected to opposite sides of the fixed part 2212, respectively, the positioning part 2214 is provided with a positioning hole 2215 in the direction of the connecting shaft 270, the connecting shaft 270 penetrates through the positioning hole 2215, and the front face of the fixed part 2212 is provided with a fixed hole 2216. Optionally, each rotation assisting assembly comprises at least one positioning piece 221, in the embodiment, each rotation assisting assembly comprises three positioning pieces 221, two of which are positioned at opposite ends of a pair of connecting shafts 270, and the other is positioned at the middle of the pair of connecting shafts 270. One of the end faces of the fixed part 2212 is provided with two support holes 2217 spaced from each other.

[0086] The end of the synchronous piece 272 away from the back shell 23 is connected to the connecting piece 242 through the cooperation of a second sliding groove and a second sliding rail, the second sliding rail is arranged on one of the synchronous piece 272 and the connecting piece 242, the second sliding groove is arranged on the other one of the synchronous piece 272 and the connecting piece 242, and the length direction of the second sliding rail is perpendicular to the axis. In the embodiment, the front face of the connecting piece 242 is provided with a sliding assisting space 2425 near the first sliding groove 2420, the opposite ends of the sliding assisting space 2425 penetrate through the opposite side faces of the connecting piece 242, respectively, the connecting piece 242 is provided with second sliding grooves 2426 on the opposite side faces of the sliding assisting space 2425, respectively, the length direction of the second sliding grooves 2426 is perpendicular to the axis of the connecting shaft 270, and the length direction of the second sliding grooves 2426 is inclined to the length direction of the first sliding groove 2420; the opposite sides of the second sliding part 2725 are provided with second sliding rails 2726, respectively, and the length direction of the second sliding rails 2726 is perpendicular to the connecting shaft 270; when the second sliding part 2725 is slidingly accommodated in the sliding assisting space 2425, the two second sliding rails 2726 are slidingly accommodated in the two second sliding grooves 2426, respectively.

[0087] The synchronous mechanism 27 further comprises a synchronous gear assembly 275, the synchronous gear assembly 275 comprising two driving gears 2751 and two driven gears 2753 meshing with each other, the two driving gears 2751 being respectively arranged on the outer circumferential walls of the two second rotating portions 2721, and the driven gears 2753 being located between the two second rotating portions 2721, and the two driving gears 2751 being respectively meshed with the two driven gears 2753. In this embodiment, the synchronous gear assembly 275 comprises two driven gears 2753 meshing with each other, the two driven gears 2753 being located between the two second rotating portions 2721, and each driving gear 2751 being meshed with a corresponding driven gear 2753, so that the two synchronous members 272 can be synchronously rotated relative to the back shell 23 through the synchronous gear assembly 275. Specifically, the driven gear 2753 comprises a rotating shaft 2754 and a gear ring, the gear ring being fixedly sleeved on the rotating shaft 2754, and opposite ends of the rotating shaft 2754 extending out of opposite ends of the gear ring.

[0088] The rotating member 244 on the same side of the back shell 23 is connected with the synchronizing member 272 through the cooperation of double sliding grooves and double sliding rods. The double sliding grooves are oppositely arranged, and the double sliding rods are parallel to the axis of the connecting shaft 270 and can be respectively slidingly and rollingly accommodated in the double sliding grooves. The double sliding grooves are arranged in one of the rotating member 244 and the synchronizing member 272, and the double sliding rods are arranged in the other one of the rotating member 244 and the synchronizing member 272. In the embodiment, the double sliding grooves include first sliding grooves 2441 and second sliding grooves 2443 arranged on the opposite sides of the end of the rotating member 244 away from the back shell 23, and the double sliding rods include first sliding rods 2720 and second sliding rods 2727 arranged on the end of the synchronizing member 272 away from the back shell 23. The first sliding rods 2720 and the second sliding rods 2727 are parallel to each other and are spaced apart from each other. The first sliding rods 2720 are slidingly and rollingly accommodated in the first sliding grooves 2441, and the second sliding rods 2727 are slidingly and rollingly accommodated in the second sliding grooves 2443. Specifically, the end of the rotating member 244 away from the back shell 23 is provided with the first sliding grooves 2441 and the second sliding grooves 2443 on the back surface and the front surface facing the synchronizing member 272, respectively, and the end of the synchronizing member 272 away from the back shell 23 is provided with the first sliding rods 2720 and the second sliding rods 2727 facing the rotating member 244. In other embodiments, the first sliding rods 2720 and the second sliding rods 2727 can be arranged on the end of the rotating member 244 away from the back shell 23, and the first sliding grooves 2441 and the second sliding grooves 2443 can be arranged on the back surface and the back surface of the end of the synchronizing member 272 away from the back shell 23. When the folding device 22 is in the unfolded state, the first sliding rods 2720 are positioned at the end of the first sliding grooves 2441 away from the back shell 23, and the second sliding rods 2727 are positioned at the end of the second sliding grooves 2443 away from the back shell 23. When the folding device 22 is in the folded state, the first sliding rods 2720 are positioned at the end of the first sliding grooves 2441 close to the back shell 23, and the second sliding rods 2727 are positioned at the end of the second sliding grooves 2443 close to the back shell 23. The rotating member 244 on the same side of the back shell 23 is connected with the synchronizing member 272 through the cooperation of double sliding grooves and double sliding rods. Only one layer wall is required between the double sliding grooves, thereby saving at least the thickness of one layer wall, facilitating the miniaturization of the folding device 22 and the thinning of the electronic equipment 100.

[0089] As shown in FIG. 8 and FIG. 9, the damping mechanism 28 comprises a bearing member 281 and an elastic member 285, the bearing member 281 comprises two bearing cylinders 2812 at opposite ends of the bearing member 281, the two bearing cylinders 2812 are respectively sleeved on the two connecting shafts 270 in a sliding manner, and the elastic member 285 is used to elastically push the bearing member 281, so that the two bearing cylinders 2812 are respectively abutted against the two second rotating parts 2721, and each second rotating part 2721 is connected with the corresponding bearing cylinder 2812 through the cooperation of the first rotating cam and the first abutment cam. In the embodiment, the second rotating part 2721 is a rotating cylinder sleeved on the connecting shaft 270, the second rotating part 2721 is provided with a rotating hole in the axial direction, the first rotating cam 282 is arranged on one end of the second rotating part 2721 facing the bearing member 281, the first abutment cam 283 is arranged on one end of the bearing cylinder 2812 facing the synchronous member 272, and the first rotating cam 282 and the first abutment cam 283 on the same connecting shaft 270 are coaxial. Specifically, the first rotating cam 282 comprises a concave-convex surface arranged on one end of the second rotating part 2721, the concave-convex surface comprises first convex parts and first concave parts arranged in sequence and spaced apart in the circumferential direction of the second rotating part 2721; the number of the first convex parts and the number of the first concave parts can be set according to needs; in the embodiment, the first rotating cam 282 comprises three first convex parts and three first concave parts. The first abutment cam 283 comprises a concave-convex surface arranged on one end of the bearing cylinder 2812, the concave-convex surface comprises second convex parts and second concave parts arranged in sequence and spaced apart in the circumferential direction of the bearing cylinder 2812; the number of the second convex parts and the number of the second concave parts can be set according to needs, and in the embodiment, the first abutment cam 283 comprises three second convex parts and three second concave parts.

[0090] Optionally, the abutting member 281 is provided with two connection holes 2814 spaced from each other between the two abutting cylinders 2812, the axial direction of the connection hole 2814 is parallel to the axial direction of the abutting cylinder 2812, and the second rotating cam 284 is arranged on the end of the driven gear 2753 facing the abutting member 281. The abutting member 281 is provided with a second abutting cam 286 around the connection hole 2814, and the second rotating cam 284 is connected with the second abutting cam 286. The second rotating cam 284 is arranged around the rotation axis of the driven gear 2753. Each second abutting cam 286 is coaxial with the corresponding second rotating cam 284. Specifically, the second rotating cam 284 includes a concave-convex surface arranged on one end of the driven gear 2753, and the concave-convex surface includes third convex portions and third concave portions arranged in sequence and spaced from each other in the circumferential direction of the driven gear 2753. The number of third convex portions and the number of third concave portions can be set as required. In the embodiment, the second rotating cam 284 includes three third convex portions and three third concave portions. The second abutting cam 286 includes a concave-convex surface arranged on the abutting member 281, and the concave-convex surface includes fourth convex portions and fourth concave portions arranged in sequence and spaced from each other in the circumferential direction of the connection hole 2814. The number of fourth convex portions and the number of fourth concave portions can be set as required. In the embodiment, the second abutting cam 286 includes three fourth convex portions and three fourth concave portions.

[0091] The abutting member 281 further includes a support rod 288 arranged on the side of the abutting member 281 away from the second abutting cam 286, and the axial direction of the support rod 288 is parallel to the axial direction of the abutting cylinder 2812. In the embodiment, the side of the abutting member 281 away from the second abutting cam 286 is provided with two support rods 288 spaced from each other, and the two support rods 288 are located between the two abutting cylinders 2812. The elastic member 285 can be, but is not limited to, a spring, elastic rubber, elastic plastic, etc. In the embodiment, the damping mechanism 28 includes four elastic members 285, two of which are respectively sleeved on the two support rods 288, and the other two of which are respectively sleeved on the two connecting shafts 270.

[0092] The connecting shaft 270 includes a shaft body 2701 and a stop cap 2703 arranged on one end of the shaft body 2701, and a clamping groove 2705 is arranged on the outer circumferential wall of the shaft body 2701 away from the stop cap 2703 and surrounds the clamping groove 2705 in one circle in the circumferential direction. The assisting rotating assembly further includes two buckles 287 for clamping the clamping grooves 2705 of the two connecting shafts 270. In other embodiments, the buckle 287 can also be, but is not limited to, a C-shaped card, a U-shaped card, etc. In the embodiment, the buckle 287 is a C-shaped card.

[0093] As shown in FIG. 4 and FIG. 5, the support mechanism 26 comprises a middle support 262 and two side supports 264 located at opposite sides of the middle support 262, the front surface of the middle support 262 and the front surface of the two side supports 264 are used to support the back surface of the bendable area 31 of the flexible screen 30, and the side supports 264 are rotationally connected with the connecting pieces 242. The middle support 262 is used to be connected with the back cover 23, and the middle support 262 and the back cover 23 jointly hold the positioning piece 221. Specifically, the middle support 262 comprises a rectangular middle support plate 2621 and fixing areas 2623 arranged on the back surface of the middle support plate 2621, and the fixing areas 2623 hold the rotating pieces 244 with the back cover 23. In the embodiment, the back surface of the middle support plate 2621 is provided with four fixing areas 2623, two of which are located at one end of the middle support plate 2621, and the other two are located at the opposite end of the middle support plate 2621. Each fixing area 2623 comprises two guide rotating strips 2624 parallel to each other, the length direction of the guide rotating strips 2624 is parallel to the length direction of the middle support plate 2621, and the back surface of each guide rotating strip 2624 is provided as a circular arc surface. The middle part of the two guide rotating strips 2624 is provided with a positioning cylinder 2625, the axial direction of the positioning cylinder 2625 is perpendicular to the length direction of the guide rotating strips 2624. The opposite sides of the middle support plate 2621 are respectively provided with a plurality of avoiding grooves arranged along the length direction of the middle support plate 2621. The front surface of the middle support plate 2621 is provided with a plurality of countersunk holes 2627 arranged along the length direction of the middle support plate 2621.

[0094] The side support 264 is connected with the connecting member 242 through a second circular arc track and a second circular arc groove. The second circular arc track is arranged on one of the side support 264 and the connecting member 242, and the second circular arc groove is arranged on the other one of the side support 264 and the connecting member 242. The axis of the second circular arc track is parallel to the axis of the connecting shaft 270. The side support 264 is connected with the rotating member 244 through a limiting groove and a limiting shaft. The limiting groove is arranged on one of the side support 264 and the rotating member 244, and the limiting shaft is arranged on the other one of the side support 264 and the rotating member 244. The axis of the limiting shaft is parallel to the axis of the connecting shaft 270. Specifically, the side support 264 comprises a rectangular side support plate 2641 and a connecting area arranged on the back of the side support plate 2641. The connecting area is connected with the connecting member 242 and the rotating member 244. In the embodiment, the back of the side support 264 is provided with four connecting areas. The back of one end of the side support plate 2641 is provided with two connecting areas which are spaced apart from each other. The back of the other end of the side support plate 2641 is provided with two connecting areas which are spaced apart from each other. Each connecting area comprises two connecting blocks 2642 which are spaced apart from each other and are arranged on the side of the side support plate 2641 which is away from the middle support plate 2621, and a rolling block 2647 which is arranged on the side of the side support plate 2641 which is close to the middle support plate 2621. In the embodiment, the side of the connecting member 242 which is away from the rotating member 244 is provided with a second circular arc groove 2427. The connecting block 2642 is provided with a second circular arc track 2643. The second circular arc track 2643 is rotatably arranged in the second circular arc groove 2427. The rolling block 2647 is provided with a limiting groove 2648. The limiting groove 2648 comprises a first end and a second end which are arranged at two opposite ends of the limiting groove 2648. The first end is away from the back shell 23 compared with the second end. The limiting shaft 2448 of the rotating member 244 is slidably arranged in the limiting groove 2648. The side of the connecting member 242 which is away from the rotating member 244 is provided with a mounting block 2428. In the embodiment, the side of the connecting member 242 which is away from the mounting block 2428 is provided with a plurality of mounting blocks 2428. The plurality of mounting blocks 2428 are arranged along the length direction of the connecting member 242. Each mounting block 2428 is provided with a mounting hole.

[0095] Please refer to Figs. 4-5 and Figs. 8-9, when assembling the assisting rotating assembly, the two driven gears 2753 are engaged with each other, and the same ends of the rotating shafts 2754 of the two driven gears 2753 are rotatably inserted into the two supporting holes 2217 of the positioning member 221 respectively; the driving gears 2751 of the two synchronous members 272 are engaged with the two driven gears 2753 respectively, the first abutting cams 283 of the two abutting barrels 2812 of the abutting member 281 are connected with the first rotating cams 282 on the two second rotating parts 2721 respectively, and the two second abutting cams 286 are connected with the two second rotating cams 284 respectively; the two elastic members 285 are sleeved on the two supporting rods 288 of each abutting member 281 respectively, the two connecting shafts 270 are respectively threaded through the two positioning holes 2215 of the positioning member 221, the two elastic members 285, the two abutting barrels 2812 of the abutting member 281 and the inner cavities of the second rotating parts 2721 of the two synchronous members 272, until the clamping grooves 2705 of the connecting shafts 270 are exposed outside the corresponding positioning parts 2214, the buckles 287 are clamped on the clamping grooves 2705 of the connecting shafts 270, and the stop caps 2703 of the connecting shafts 270 are stopped at the corresponding positioning parts 2214. At this time, the two first sliding rods 2720 are slidably and rollably accommodated in the two first sliding grooves 2441 respectively, and the two second sliding rods 2727 are slidably and rollably accommodated in the two second sliding grooves 2443 respectively; the elastic members 285 elastically abut and push the abutting members 281, so that the first protruding part is accommodated in the second recessed part, the second protruding part is accommodated in the first recessed part, the third protruding part is accommodated in the fourth recessed part, and the fourth protruding part is accommodated in the third recessed part. The first sliding rails 2445 of the two rotating members 244 are inserted into the first sliding grooves 2420 of the two connecting members 242 respectively, until the stop blocks 2423 are stopped in the corresponding stop grooves, the second sliding parts 2725 of the two synchronous members 272 are slidably accommodated in the assisting sliding spaces 2425 of the two connecting members 242 respectively, and the two second sliding rails 2726 of each synchronous member 272 are slidably accommodated in the two second sliding grooves 2426 respectively.

[0096] As shown in FIG. 4 and FIG. 5, when assembling the folding device 22, the two assembled folding assisting assemblies are positioned respectively at the two positioning spaces 233 on the front face of the back shell 23. Specifically, the positioning members 221 of each folding assisting assembly are respectively sleeved on the corresponding fixing cylinders 2336 on the back shell 23. The middle support plate 2621 is covered on the front face of the positioning members 221 of the folding assisting assembly, so that the plurality of counterbores 2627 are respectively opposite to the first fixing holes 2337 of the plurality of fixing cylinders 2336, and the plurality of locking members such as screws are respectively locked in the corresponding first fixing holes 2337 through the plurality of counterbores 2627. The first rotating part 2442 of the rotating member 244 is clamped between the guide rotating strip 2624 and the back shell 23, and the first circular arc track 2440 is rotatably accommodated in the corresponding first circular arc groove 2331. The two side support members 264 are respectively arranged on the opposite sides of the back shell 23, so that each second circular arc track 2643 is rotatably inserted in the corresponding second circular arc groove 2427, and each limiting shaft 2448 is slidably inserted in the corresponding limiting groove 2648.

[0097] As shown in FIG. 3, the frame 21 includes a front face 211, a back face 212, two opposite end faces 214, and two opposite side faces 215. The front face 211 of the frame 21 near the folding device 22 is provided with a mounting groove 216 and a fixing groove 218. The mounting groove 216 is communicated with the fixing groove 218. The fixing groove 218 is near the end face 214 of the frame 21. The connecting member 242 is positioned in the mounting groove 216, and the second limiting member 253 is positioned in the fixing groove 218. The opposite ends of the mounting groove 216 are respectively near the two opposite end faces 214 of the frame. One side of the mounting groove 216 penetrates through the side face 215 of the frame 21 facing the folding device 22. The fixing groove 218 is located at the bottom end of the mounting groove 216, which does not weaken the wall thickness of the end wall of the frame and improves the strength of the frame 21. In this embodiment, the opposite ends of the front face 211 of the frame 21 near the folding device 22 are respectively provided with the fixing groove 218. The opposite ends of the mounting groove 216 are respectively communicated with the two fixing grooves 218. The two second limiting members 253 are respectively positioned in the two fixing grooves 218. The frame 21 is provided with a mounting portion 217 on the bottom face of the mounting groove 216. In this embodiment, the bottom face of the mounting groove 216 is provided with a plurality of mounting portions 217. The plurality of mounting portions 217 are arranged along the length direction of the mounting groove 216. Each mounting portion 217 is provided with a locking hole 219.

[0098] Please refer to FIG. 2-3 and FIG. 10-16, when assembling the folding shell 20, the installed folding device 22 is placed between the two frame bodies 21, so that the connecting pieces 242 on the opposite sides of the folding device 22 are respectively accommodated in the installation grooves 216 of the two frame bodies 21, so that each connecting piece 242 is fixedly connected to the corresponding installation part 217; the second limiting piece 253 is fixedly connected to the corresponding fixed groove 218 of the frame body 21. In the embodiment, the locking member such as a screw is locked in the locking hole 219 of the corresponding installation part 217 through the installation hole of the installation block 2428; the second limiting piece 253 is clamped in the corresponding fixed groove 218, that is, the second limiting piece 253 is connected to the corresponding connecting piece 242 through the frame body 21. In other embodiments, the installation block 2428 and the installation part 217 can also be fixedly connected through but not limited to buckling, gluing or welding and the like; the second limiting piece 253 and the corresponding fixed groove 218 can also be connected through but not limited to gluing, screwing and the like.

[0099] As shown in FIG. 1-2, when assembling the electronic device 100, the two non-bending areas 33 of the flexible screen 30 are respectively connected to the front surfaces 211 of the two frame bodies 21, specifically, the opposite sides of each non-bending area 33 are respectively connected to the opposite sides of the front surface 211 of the corresponding frame body 21 through glue; the front surfaces of the two side support pieces 264 are respectively connected to the back surface of the bendable area 31 through glue. The glue can be but not limited to glue or double-sided tape and the like. The supporting surface 2538 of the second limiting piece 253 faces away from the frame body 21, and the supporting surface 2538 is close to the front surface 211 of the frame body 21.

[0100] Please refer to FIG. 1 and FIG. 12-16, when the electronic device 100 is in the flat state, the two side support pieces 264 are respectively located on the opposite sides of the back cover 23, and the two second limiting pieces 253 of each limiting mechanism 25 are respectively located on the opposite sides of the back cover 23; the front surfaces of the side support pieces 264, the front surface of the middle support piece 262, and the front surfaces 211 of the two frame bodies 21 are coplanar, the supporting surface 2538 of the second limiting piece 253 is close to the front surface of the side support piece 264, and the back surface of the bendable area 31 is attached to the front surface of the folding device 22; since the front surfaces of the side support pieces 264, the front surface of the middle support piece 262, and the front surfaces 211 of the two frame bodies 21 are coplanar, and the supporting surface 2538 is close to the front surface of the side support piece 264, the back surface of the bendable area 31 is avoided to have a gap, so as to prevent the flexible screen 30 from having bad points and other adverse problems.

[0101] Please refer to FIG. 1 and FIG. 17-25, when folding the electronic device 100, a folding force is applied to at least one of the two frame bodies 21 of the electronic device 100, so that the rotating mechanisms 24 connected to the two frame bodies 21 are synchronously rotated relative to the back shell 23 by the synchronous gear assembly to the direction of approaching each other; Specifically, one of the frame bodies 21 drives the corresponding rotating mechanism 24 to rotate relative to the back shell 23, so that the first circular arc track of the rotating member 244 rotates in the first circular arc groove of the back shell 23, the second circular arc track of the side support member 264 rotates in the corresponding second circular arc groove, the limiting shaft slides in the corresponding limiting groove to the end close to the back shell 23, and the first sliding track 2445 slides in the corresponding first sliding groove 2420; At the same time, the second sliding track 2726 of the synchronous member 272 slides in the corresponding second sliding groove 2426, the first sliding rod 2720 of the synchronous member 272 slides and rolls in the first sliding groove 2441, the second sliding rod 2727 slides and rolls in the second sliding groove 2443, and the second rotating part 2721 of the synchronous member 272 rotates relative to the back shell 23 around the corresponding connecting shaft 270, the drive gear 2751 on the synchronous member 272 drives the driven gear 2753 to rotate so as to drive the drive gear 2751 of the other synchronous member 272 to rotate relative to the connecting shaft, so that the second rotating part 2721 of the other synchronous member 272 rotates relative to the back shell 23 around the corresponding connecting shaft 270, the second sliding track 2726 of the other synchronous member 272 slides in the corresponding second sliding groove 2426, the first sliding rod 2720 slides and rolls in the first sliding groove 2441, and the second sliding rod 2727 slides and rolls in the second sliding groove 2443, and the first sliding track 2445 slides in the corresponding first sliding groove 2420, so that the two rotating mechanisms 24 are synchronously rotated relative to the back shell 23 to approach each other, and the two side support members 264 are respectively folded relative to the back shell 23 with the two rotating members 244 and the two connecting members 242 to form a cross-section in the shape of a water droplet with the front surface of the two side support members 264 and the front surface of the middle support member 262, the two second limiting members 253 of each limiting mechanism 25 approach each other relative to the first limiting member 251 with the two frame bodies 21 until the limiting grooves of the two second limiting members 253 are respectively opposite to the first limiting part 2510 of the first limiting member 251, and there is a gap between the inner surface of the limiting groove of each second limiting member 253 and the surface of the first limiting part 2510 away from the back shell 23; The bendable area 31 of the flexible screen 30 is bent with the folding device 22 until the bendable area 31 is bent into the shape of a water droplet, so as to realize the folding of the electronic device 100.

[0102] 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 rotated relative to the back shell 23 to move towards each other, the two rotating mechanisms 24 are rotated relative to the back shell 23 to move towards each other, the two side supports 264 are folded relative to the back shell 23 along with the two rotating mechanisms 24 and the two synchronization members 272 to move towards each other, so that the front surfaces of the two side supports 264 and the front surface of the middle support 262 form a cross-section in the shape of a water droplet; the two second limiting members 253 of each limiting mechanism 25 are moved relative to the first limiting member 251 along with the two frame bodies 21 to move towards each other until the limiting grooves of the two first limiting members 251 are respectively opposite to the first limiting portions 2510 of the first limiting member 251, and there is a gap between the inner surface of the limiting groove of each second limiting member 253 and the surface of the first limiting portion 2510 away from the back shell 23; the bendable area 31 of the flexible screen 30 is folded along with the folding device 22 until the bendable area 31 is folded in the shape of a water droplet, thereby achieving the folding of the electronic device 100.

[0103] 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 rotated relative to the back shell 23 to move towards each other, the two rotating mechanisms 24 are rotated relative to the back shell 23 to move towards each other, the two side supports 264 are folded relative to the back shell 23 along with the two rotating mechanisms 24 and the two synchronization members 272 to move towards each other, so that the front surfaces of the two side supports 264 and the front surface of the middle support 262 form a cross-section in the shape of a water droplet; the two second limiting members 253 of each limiting mechanism 25 are moved relative to the first limiting member 251 along with the two frame bodies 21 to move towards each other until the limiting grooves of the two first limiting members 251 are respectively opposite to the first limiting portions 2510 of the first limiting member 251, and there is a gap between the inner surface of the limiting groove of each second limiting member 253 and the surface of the first limiting portion 2510 away from the back shell 23; the bendable area 31 of the flexible screen 30 is folded along with the folding device 22 until the bendable area 31 is folded in the shape of a water droplet, thereby achieving the folding of the electronic device 100.

[0104] 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 rotated relative to the back shell 23 to move towards each other, the two rotating mechanisms 24 are rotated relative to the back shell 23 to move towards each other, the two side supports 264 are folded relative to the back shell 23 along with the two rotating mechanisms 24 and the two synchronization members 272 to move towards each other, so that the front surfaces of the two side supports 264 and the front surface of the middle support 262 form a cross-section in the shape of a water droplet; the two second limiting members 253 of each limiting mechanism 25 are moved relative to the first limiting member 251 along with the two frame bodies 21 to move towards each other until the limiting grooves of the two first limiting members 251 are respectively opposite to the first limiting portions 2510 of the first limiting member 251, and there is a gap between the inner surface of the limiting groove of each second limiting member 253 and the surface of the first limiting portion 2510 away from the back shell 23; the bendable area 31 of the flexible screen 30 is folded along with the folding device 22 until the bendable area 31 is folded in the shape of a water droplet, thereby achieving the folding of the electronic device 100.

[0105] When the electronic device 100 is in the fully folded state, the opposite ends of the first limiting portion 2510 of the first limiting member 251 respectively face the second limiting portions 2530 of the two second limiting members 253, and there is a gap between the first limiting portion 2510 and the second limiting portion 2530. When the electronic device 100 is being folded or unfolded, the second limiting portion 2530 will not come into contact with the first limiting portion 2510, thereby avoiding the generation of folding noise by the folding device 22 and improving the assembly yield of the folding device 22. In addition, when the electronic device 100 in the fully folded state falls in the F direction, the stress caused by the impact of the back shell 23 of the electronic device 100 on the ground is reliably transmitted from the back shell 23 to the first limiting member 251 through the reliable contact relationship, and the back shell 23 and the first limiting member 251 move towards the second limiting member 253, thereby releasing part of the impact force and preventing the stress from being directly transmitted to the frame 21. In this way, the deformation of the back shell 23 and the direct impact of the flexible screen 30 are avoided, and the first limiting portion 2510 can be positioned in the second limiting portion 2530, thereby preventing the first limiting member 251 from being pulled out of the second limiting member 253 and preventing the two frames 21 from being pulled apart to damage the flexible screen 30. In addition, the second limiting member 253 is fixedly connected to the bottom end of the mounting groove 216 of the frame 21, rather than being directly connected to the end face of the frame 21, thereby avoiding weakening the strength of the frame 21.

[0106] As shown in FIGS. 26-29, the structure of the folding shell 20a in the second embodiment of the present application is similar to that of the folding shell 20 in the first embodiment, except that the connection relationship between the second limiting member 253a and the connecting member 242 in the second embodiment is different from that between the second limiting member 253 and the connecting member 242 in the first embodiment. Specifically, the connecting member 242 and the second limiting member 253 are integrally formed in the second embodiment, and in this embodiment, the connecting member 242 and the second limiting member 253 are integrally formed by injection molding, so that the second limiting member 253 is fixedly connected to the end of the connecting member 242 through the fixing block 246, that is, the second limiting member 253 is part of the connecting member 242, the connecting member 242 is connected to one end of the fixing block 246, and the second limiting member 253 is connected to the other end of the fixing block 246. The connecting member 242 can be accommodated in the mounting groove 216 of the frame 21, and the connecting member 242 is fixedly connected to the mounting portion 217, so that the connecting member 242 is fixedly connected to the frame 21, and the second limiting member 253 is positioned in the corresponding fixing groove 218. Since the second limiting member 253 and the connecting member 242 are an integral structure, the second limiting member 253 is fixedly connected to the frame 21 together with the connecting member 242, and the second limiting member 253 does not need to be directly connected to the frame 21, thereby omitting the connection process of the second limiting member 253 and the frame 21 in the first embodiment, saving the assembly cost and manufacturing cost of the second limiting member 253, and making the connection of the second limiting member 253 and the frame 21 more secure.

[0107] As shown in FIGS. 30-34, the folding and unfolding manners of the folding shell 20a in the second embodiment are the same as those of the folding shell 20 in the first embodiment, and thus are not described herein. When the folding shell 20a in the second embodiment is in the unfolded state, the two connecting members 242 of each assisting assembly are located at opposite sides of the back shell 23 respectively, the two second limiting members 253 of each limiting mechanism 25 are located at opposite sides of the back shell 23 respectively, that is, the two second limiting members 253 are located at opposite ends of the first limiting member 251 respectively, and a gap is formed between each second limiting member 253 and the first limiting member 251. The supporting mechanism 26 is in the unfolded state. When the folding shell 20a is in the completely folded state, the two connecting members 242 of each assisting assembly are close to each other, the two second limiting members 253 of each limiting mechanism 25 are close to each other and located at a side of the first limiting member 251 away from the back shell 23, the second limiting part 2530 of each second limiting member 253 faces the first limiting member 251, and a gap is formed between the second limiting part 2530 and the first limiting member 251. The supporting mechanism 26 is bent into a water-drop shape, so as to realize the folding of the electronic device.

[0108] The above is the implementation of the embodiments of the present application. It should be noted that, for those skilled in the art, without departing from the principles of the embodiments of the present application, a number of improvements and refinements can be made, which are also considered to be within the protection scope of the present application.

Claims

1. A folding device disposed between two frames, characterized by, The folding device comprises: a back shell between the two frame bodies; and a limiting mechanism comprising a first limiting member and a second limiting member, the first limiting member being connected to the back shell, the second limiting member being connected to the frame body, the first limiting member comprising a first limiting portion, the second limiting member comprising a second limiting portion; when the folding device is in a fully folded state, the first limiting portion is directly opposite the second limiting portion, and the first limiting portion and the second limiting portion have a gap.

2. The folding device of claim 1, wherein The end of the back shell and the first limiting member are connected through the cooperation of a positioning groove and a positioning block, the positioning groove being provided in one of the back shell and the first limiting member, and the positioning block being provided in the other one of the back shell and the first limiting member.

3. The folding device of claim 1, wherein The first limiting portion is a limiting plate provided at the end of the first limiting member away from the back shell, and the second limiting portion is a limiting groove provided at the end of the second limiting member facing the back shell; or the first limiting portion is a limiting groove provided at the end of the first limiting member away from the back shell, and the second limiting portion is a limiting plate provided at the end of the second limiting member facing the back shell.

4. The folding device of claim 3, wherein The first limiting portion has a first limiting surface away from the back shell, the first limiting surface being inclined to the length direction of the back shell, the second limiting portion has a second limiting surface facing the first limiting member, when the folding device is in a fully folded state, the first limiting surface is directly opposite the second limiting surface, and the first limiting surface and the second limiting surface have a gap; the first limiting surface can be attached to the second limiting surface, so that the first limiting portion is positioned in the second limiting portion.

5. The folding device of claim 4, wherein The limiting groove also has a stop surface connected to the second limiting surface, the second limiting surface being inclined to the stop surface, and the second limiting surface and the stop surface enclose the limiting groove.

6. The folding device of claim 3, wherein The shape of the outer surface of the side of the limiting plate away from the back shell is consistent with the shape of the inner surface of the limiting groove.

7. The folding device of claim 3, wherein When the folding device is in a fully folded state, the limiting plate is directly opposite the limiting groove, and the surface of the limiting plate away from the back shell has a gap with the inner surface of the limiting groove.

8. The folding apparatus of claim 2, wherein The first limiting member further comprises a first connecting block, the first limiting portion being provided at the side of the first connecting block away from the back shell, the side of the first connecting block away from the first limiting portion being provided with the positioning block, and the end of the back shell being provided with the positioning groove; when the positioning block is positioned in the positioning groove, the end surface of the back shell is coplanar with the side surface of the first limiting portion away from the back shell.

9. The folding apparatus of claim 5, wherein, The second limiting member further comprises a second connecting block connected to the frame body and a limiting block, the limiting block being connected to the end of the second connecting block facing the back shell, the end surface of the limiting block away from the second connecting block being provided with a limiting groove, and the first limiting portion being a limiting plate provided at the end of the first limiting member away from the back shell.

10. The folding device of claim 9, wherein The second limiting member further comprises a stop piece, one end of the stop piece being connected to the second connecting block, and the stop piece being connected to the limiting block, and the stop surface being connected to the side surface of the stop piece. The second limiting member further comprises a stop piece, one end of the stop piece being connected to the second connecting block, and the stop piece being connected to the limiting block, and the stop surface being connected to the side surface of the stop piece.

11. The folding apparatus of claim 1, wherein The folding device further comprises rotating mechanisms connected between the back shell and the frame bodies, and each rotating mechanism comprises a connecting piece connected to the frame body and integrally formed with the second limiting piece.

12. The folding device of claim 11, wherein, Each connecting piece of the rotating mechanisms is provided with the second limiting piece at the end thereof, and the opposite ends of the first limiting part are close to the opposite sides of the back shell.

13. A collapsed housing characterized by, The folding device comprises the folding device and two frame bodies according to any one of claims 1-12, and the folding device is located between the two frame bodies, and the second limiting piece of the folding device is fixedly connected to the frame bodies.

14. The collapsed housing of claim 13, wherein, The frame body is provided with a fixing groove on the front side close to the folding device, and the second limiting piece is located in the fixing groove.

15. The breakaway case of claim 14, wherein, The frame body is provided with a mounting groove on the front side close to the folding device, and the opposite ends of the mounting groove are close to the opposite end faces of the frame body, one side of the mounting groove penetrates through the frame body and faces the side of the folding device, the fixing groove is close to the end face of the frame body, the mounting groove is communicated with the fixing groove, and the connecting piece of the folding device is located in the mounting groove.

16. An electronic device, comprising: The electronic device comprises a flexible screen and the folding housing according to any one of claims 13-15, the flexible screen comprises a bendable area and two non-bendable areas, the bendable area is located between the two non-bendable areas, the two non-bendable areas are connected to the front sides of the two frame bodies of the folding housing respectively, and the bendable area faces the front side of the folding device of the folding housing.

Images