CN115163655B

CN115163655B - Folding device, folding shell and electronic equipment

Info

Publication number: CN115163655B
Application number: CN202210986011.6A
Authority: CN
Inventors: 梁子豪; 彭翊; 张前
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2024-02-23
Anticipated expiration: 2041-11-29
Also published as: CN114135567B; CN114135567A; CN115163655A; WO2023093171A1

Abstract

The invention provides a folding device, which comprises a bendable mechanism and a rotating assembly, wherein the bendable mechanism comprises two side supporting pieces; the rotating assembly comprises a positioning piece and two rotating mechanisms respectively arranged on two opposite sides of the positioning piece, one end of each rotating mechanism is rotationally connected with the positioning piece, the other end of each rotating mechanism, which is far away from the positioning piece, is rotationally connected with a corresponding side supporting piece, and one side of each side supporting piece is rotationally and slidingly connected with the positioning piece; when the rotating mechanism rotates relative to the positioning piece, the rotating mechanism drives the side supporting pieces to rotate and slide relative to the positioning piece, so that the two side supporting pieces are mutually bent or mutually unfolded. The application also provides a folding shell provided with the folding device and electronic equipment provided with the folding shell.

Description

Folding device, folding shell and electronic equipment

Technical Field

The present invention relates to the field of flexible member support, and more particularly, to a folding device for supporting a flexible member, a folding housing provided with the folding device, and an electronic apparatus provided with the folding housing.

Background

With the development of display devices, a bendable flexible display screen has been developed, so as to design a folding electronic device such as a folding mobile phone, a folding display, and the like. The flexible display screen is generally supported at a bending position of the flexible display screen through a folding device such as a hinge mechanism. However, the existing folding device has a complex structure and high manufacturing cost.

Disclosure of Invention

The application provides a folding device with simple structure and low manufacturing cost, a folding shell provided with the folding device and electronic equipment provided with the folding shell.

The folding device comprises a bendable mechanism and a rotating assembly, wherein the bendable mechanism comprises two side supporting pieces; the rotating assembly comprises a positioning piece and two rotating mechanisms respectively arranged on two opposite sides of the positioning piece, one end of each rotating mechanism is rotationally connected with the positioning piece, the other end of each rotating mechanism, which is far away from the positioning piece, is rotationally connected with a corresponding side supporting piece, and one side of each side supporting piece is rotationally and slidingly connected with the positioning piece; when the rotating mechanism rotates relative to the positioning piece, the rotating mechanism drives the side supporting pieces to rotate and slide relative to the positioning piece, so that the two side supporting pieces are mutually bent or mutually unfolded.

The application also provides a folding casing, folding casing includes folding device and two frameworks, folding device is located two between the framework, two the framework connect respectively in folding device's two slewing mechanism, the framework drives slewing mechanism for the setting element rotates, but the mechanism of bending is followed slewing mechanism and link gear realize bending or expanding in step.

The application also provides electronic equipment, electronic equipment includes flexible piece and folding casing, the flexible piece set up in on the folding casing, the flexible piece is followed folding casing is bent or is shielded flat.

The folding device of the electronic equipment comprises a bendable mechanism and a rotating assembly, wherein the rotating assembly comprises a positioning piece and two rotating mechanisms arranged on two opposite sides of the positioning piece, one end of each rotating mechanism is rotationally connected with the positioning piece, the other end of each rotating mechanism, far away from the positioning piece, is rotationally connected with a corresponding side supporting piece, and one side of each side supporting piece is rotationally and slidingly connected with the positioning piece. The two frame bodies are close to or far away from each other, the rotating mechanism is driven to rotate relative to the positioning piece, and the rotating mechanism drives the two side supporting pieces to fold or unfold each other, so that the folding or flattening of the folding device is realized. Because folding device just can realize folding or exhibition through mechanism and the rotating assembly of can bending, need not to set up hinge mechanism, consequently, folding device's simple structure, manufacturing cost is lower, and the connection reliability between each part is high, and complete machine intensity promotes.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

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

FIG. 3 is a schematic perspective view of the folding housing and the flexible member of FIG. 2 from another perspective;

FIG. 4 is an exploded perspective view of the folding housing of FIG. 2;

FIG. 5 is an exploded perspective view of the folding housing of FIG. 3;

FIG. 6 is a schematic perspective view of the folding device of FIG. 4;

FIG. 7 is a schematic perspective view of the folding device of FIG. 5;

FIG. 8 is a partially exploded perspective view of the folding device of FIG. 6;

FIG. 9 is a partially exploded perspective view of the folding device of FIG. 7;

FIG. 10 is a schematic perspective view of another view of the folding device of FIG. 9;

FIG. 11 is an exploded perspective view of the bendable mechanism of FIG. 10;

FIG. 12 is a schematic perspective view of the bendable mechanism of FIG. 11 from another perspective;

FIG. 13 is an exploded perspective view of the folding assembly of FIG. 10;

FIG. 14 is a schematic perspective view of another view of the folding assembly of FIG. 13;

FIG. 15 is an exploded perspective view of the rotating assembly of FIG. 13;

FIG. 16 is an exploded perspective view of the rotating assembly of FIG. 14;

FIG. 17 is an enlarged view of the perspective of the folding assist assembly of FIG. 13;

FIG. 18 is an enlarged view of the perspective of the fold-assist assembly of FIG. 14;

FIG. 19 is an exploded perspective view of the folding assembly of FIG. 17;

FIG. 20 is a schematic perspective view of another view of the folding assembly of FIG. 18;

FIG. 21 is a cross-sectional view taken along line XXI-XXI in FIG. 6;

FIG. 22 is a cross-sectional view taken along line XXII-XXII in FIG. 6;

FIG. 23 is a cross-sectional view taken along line XXIII-XXIII in FIG. 6;

FIG. 24 is a schematic partial structural view of the perspective cross-section taken along line XXIV-XXIV in FIG. 1;

FIG. 25 is a schematic partial structural view of the perspective cross-section taken along line XXV-XXV in FIG. 1;

FIG. 26 is a schematic partial structural view of the perspective cross-section taken along line XXVI-XXVI in FIG. 1;

Fig. 27 is a schematic perspective view of a folded state of the electronic device in fig. 1;

FIG. 28 is a schematic perspective view of the folding device of FIG. 27;

FIG. 29 is a schematic perspective view of the folding device of FIG. 28 from another perspective;

FIG. 30 is a perspective cross-sectional view of the electronic device of FIG. 27;

FIG. 31 is a side view of the electronic device of FIG. 30;

fig. 32 is another perspective cross-sectional view of the electronic device of fig. 27;

fig. 33 is a side view of the electronic device of fig. 32.

Detailed Description

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

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

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

The folding device comprises a bendable mechanism and a rotating assembly, wherein the bendable mechanism comprises two side supporting pieces, the rotating assembly comprises a positioning piece and two rotating mechanisms respectively arranged on two opposite sides of the positioning piece, one end of each rotating mechanism is rotationally connected with the positioning piece, the other end of each rotating mechanism far away from the positioning piece is rotationally connected with the corresponding side supporting piece, and one side of each side supporting piece is rotationally and slidingly connected with the positioning piece; when the rotating mechanism rotates relative to the positioning piece, the rotating mechanism drives the side supporting pieces to rotate and slide relative to the positioning piece, so that the two side supporting pieces are mutually bent or mutually unfolded.

Referring to fig. 1 to 10, an electronic device 100 according to an embodiment of the invention includes a foldable housing 20 and a flexible member 30 disposed on the foldable housing 20. The flexible member 30 may be flexible components with corresponding functions such as a flexible display screen, a flexible touch display screen, or flexible components 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 folding housing 20 includes two frames 21 and a folding device 22 connected between the two frames 21. The flexible member 30 is provided with a bendable region 31 corresponding to the folding device 22, and two non-bendable regions 33 connected to opposite sides of the bendable region 31. The two non-bending areas 33 of the flexible element 30 can be fixed on the front faces of the two frames 21 respectively, and the bendable areas 31 are attached to the front faces of the folding devices 22. The folding device 22 is configured to support a bendable region 31 of the flexible member 30, and the flexible member 30 bends or flattens with the folding device 22. The folding device 22 comprises a bendable mechanism 23, a rotating assembly 25 and a folding assisting assembly 27, wherein the bendable mechanism 23 comprises a middle supporting piece 231 and side supporting pieces 233 arranged on two opposite sides of the middle supporting piece 231, and the flexible piece 30 is attached to the middle supporting piece 231 and the side supporting pieces 233; the rotating assembly 25 includes a positioning member 251 and rotating mechanisms 253 disposed on two opposite sides of the positioning member 251, one end of the rotating mechanism 253 is rotationally connected to the positioning member 251, the other end of the rotating mechanism 253, which is far away from the positioning member 251, is rotationally connected to the corresponding side supporting member 233, one side of the side supporting member 233, which is close to the middle supporting member 231, is rotationally and slidingly connected to the positioning member 251, the rotating mechanism 253 rotates relative to the positioning member 251, and the rotating mechanism 253 drives the side supporting member 233 to rotate and slide relative to the positioning member 251, so that the side supporting member 233 and the middle supporting member 231 are mutually bent or mutually shielded. Further, the folding assisting component 27 comprises a limiting mechanism 270 and a linkage mechanism 275, the linkage mechanism 275 is connected to the rotating component 25, and the limiting mechanism 270 is positioned between the rotating component 25 and the linkage mechanism 275; the rotating mechanism 253 rotates synchronously relative to the positioning piece 251 through the linkage mechanism 275, and the rotating mechanism 253 drives the side supporting pieces 233 to rotate synchronously relative to the positioning piece 251 and slide, so that the two side supporting pieces 233 and the middle supporting piece 231 are mutually bent or mutually unfolded. The two frames 21 are respectively connected to the two rotating mechanisms 253 of the folding device 22, the frames 21 drive the rotating mechanisms 253 to rotate relative to the positioning members 251, the bendable mechanisms 23 realize synchronous bending or unfolding along with the rotating mechanisms 253 and the linkage mechanisms 275, the flexible members 30 are bent or flattened along with the bendable mechanisms 23, and the bendable areas 31 can be bent to form U shapes or drop shapes or other shapes. In this embodiment, the bendable region 31 can be bent into a drop shape.

In this embodiment, the front surface refers to the surface facing the light emitting surface of the flexible element 30, and the back surface refers to the surface facing away from the light emitting surface of the flexible element 30. The electronic device 100 is, for example, but not limited to, a mobile phone, a tablet computer, a display, a liquid crystal panel, an OLED panel, a television, a smart watch, a VR head mounted display, a vehicle mounted display, and any other product or component having a display function. "connected" in the description of the embodiments of the present invention is intended to include both direct connection and indirect connection, such as where the a and B connections include direct connection of a and B or other connection through a third element C or more. The connection also comprises two cases of integrated connection and non-integrated connection, wherein the integrated connection means that A and B are integrally formed and connected, and the non-integrated connection means that A and B are non-integrally formed and connected.

The folding device 22 of the electronic apparatus 100 of the present invention includes a bendable mechanism 23 and a rotating assembly 25, wherein the rotating assembly 25 includes a positioning member 251 and rotating mechanisms 253 disposed on opposite sides of the positioning member 251, one end of the rotating mechanism 253 is rotatably connected to the positioning member 251, the other end of the rotating mechanism 253, which is far from the positioning member 251, is rotatably connected to the corresponding side supporting member 233, and one side of the side supporting member 233, which is close to the middle supporting member 231, is rotatably and slidably connected to the positioning member 251. The two frames are close to or far away from each other, the rotating mechanism 253 is driven to rotate relative to the positioning piece 251, and the rotating mechanism 253 drives the two side supporting pieces 233 to fold or unfold each other, so that folding or unfolding of the flexible piece 30 is achieved. Because folding device 22 just can realize folding or flattening through bendable mechanism 23 and rotating assembly 25, need not to set up hinge mechanism, consequently, folding device 22's simple structure, manufacturing cost is lower, and the connection reliability between each part is high, and complete machine intensity promotes.

As shown in fig. 8-10, the folding device 22 in this embodiment includes two rotating assemblies 25 and a folding assisting assembly 27, the two rotating assemblies 25 are respectively disposed at two opposite ends of the back of the bendable mechanism 23, and the folding assisting assembly 27 is connected to one of the rotating assemblies 25. One end of the rotating mechanism 253 is rotatably connected to the corresponding positioning piece 251, the opposite end of the rotating mechanism 253 is movably connected to the corresponding side supporting piece 233, and one side of the side supporting piece 233, which is close to the middle supporting piece 231, is movably connected to the positioning piece 251; specifically, one end of each rotation mechanism 253 near the middle support 231 is rotatably connected to the corresponding positioning member 251, the opposite end is rotatably connected to the corresponding side support 233, one side of each side support 233 near the middle support 231 is movably connected to the positioning member 251, and the rotation mechanism 253 rotates relative to the positioning member 251, so that the corresponding side support 233 slides and rotates relative to the positioning member 251, and one side support 233 is near or far from the other side support 233, thereby bending or flattening the bendable mechanism 23. Since the linkage mechanism 275 is connected to the rotating assembly 25, that is, the linkage mechanism 275 is connected between the positioning member 251 and the rotating mechanism 253, when the connecting member 256 on one side rotates, the rotating member 254 on the same side is driven to rotate relative to the positioning member 251, and the rotating member 254 drives the rotating member 254 on the other side to rotate through the linkage mechanism 275, and then drives the connecting member 256 on the other side to rotate. That is, when the rotating mechanism 253 on one side of the positioning member 251 rotates, the same side supporting member 233 is driven to rotate and slide relative to the positioning member 251, the rotating mechanism 253 drives the rotating mechanism 253 on the other side to rotate through the linkage mechanism 275, and the rotating mechanism 253 on the other side drives the same side supporting member 233 to rotate and slide relative to the positioning member 251, so that the linkage of the bendable mechanism 23 is realized.

In some embodiments, the folding device 22 may also include two rotating assemblies 25 and two folding assisting assemblies 27, the two rotating assemblies 25 are respectively disposed at two opposite ends of the back of the bendable mechanism 23, the two folding assisting assemblies 27 are respectively connected to the two rotating assemblies 25, and the rotating assemblies 25 and the folding assisting assemblies 27 are disposed at the back of the bendable mechanism 23.

In some embodiments, the folding device 22 may also include only one rotating component 25 and one folding assisting component 27 connected to the rotating component 25, where the rotating component 25 and the folding assisting component 27 are disposed on the back of the bendable mechanism 23.

In some embodiments, the folding device 22 may include three or more rotating assemblies 25 and at least one folding assisting assembly 27, the folding assisting assembly 27 is connected to one of the rotating assemblies 25, and the rotating assemblies 25 and the folding assisting assembly 27 are disposed on the back of the bendable mechanism 23.

As shown in fig. 2 to 5, the rotating mechanisms 253 on opposite sides of the folding device 22 are respectively and fixedly connected to the two frames 21, wherein one frame 21 is folded or flattened relative to the other frame 21, and can drive the corresponding rotating mechanism 253 to rotate relative to the positioning member 251, and the rotating mechanism 253 drives the corresponding side supporting member 233 to rotate and slide relative to the positioning member 251 until the two side supporting members 233 and the middle supporting member 231 are folded into a water drop shape or unfolded into a horizontal shape, and the bendable region 31 of the flexible member 30 is folded into a water drop shape or unfolded into a horizontal shape along with the bendable region 31. Specifically, the frame 21 includes a front 211, a back 213, opposite side 214 and two end 215, the folding device 22 is connected between the two end 215 of the two frames 21, and the non-bending region 33 of the flexible member 30 is connected to the front 211 of the frame 21; the end surface 215 of each frame 21 facing the folding device 22 is provided with a receiving groove 216, the receiving groove 216 penetrates through the front surface 211 of the frame 21, and two opposite ends of the receiving groove 216 extend to be close to two opposite side surfaces 214 of the frame 21. The bottom surface of the receiving groove 216 of the frame 21 is provided with a fixing bar 217 for fixedly connecting the rotating mechanism 253, the fixing bar 217 is provided with a plurality of connecting holes 2170, and each connecting hole 2170 penetrates through the back surface 213 of the frame 21. The back 213 of the frame 21 is provided with a plurality of accommodating spaces (not shown in the figure) for mounting electronic devices such as a circuit board and a battery; the back surface 213 of the frame 21 is also covered with a back cover (not shown).

Referring to fig. 11 and 12 together, the middle support member 231 has a strip shape and includes a front surface 2311 and a back surface 2312 facing away from the front surface 2311, and connecting posts 2313 are respectively protruded at opposite ends of the back surface 2312 of the middle support member 231, and the connecting posts 2313 are axially provided with connecting holes 2314. A plurality of positioning grooves 2315 are respectively formed in two opposite sides of the back surface 2312 of the middle support 231, the positioning grooves 2315 on the same side are arranged at intervals along the length direction of the middle support 231, and the positioning grooves 2315 are respectively formed in two opposite sides of each connecting column 2313; opposite ends of the back surface 2312 of the middle support 231 are respectively provided with a pair of avoidance grooves 2317, and each pair of avoidance grooves 2317 is located at opposite sides of the middle support 231. The middle supporting member 231 extends toward opposite sides of the supporting piece 2318 near the middle, respectively.

The side support 233 is in a rectangular plate shape and comprises a front surface 2331 and a back surface 2332 facing away from the front surface 2331, the side support 233 is provided with a guide sliding part 2333, and the guide sliding part 2333 is provided with a guide sliding groove 2334; specifically, two opposite ends of the back surface 2332 of the side support member 233 are respectively provided with a protruding guide sliding portion 2333, each guide sliding portion 2333 is an arc-shaped block, one end of the arc-shaped block extends out of the side support member 233 toward the side surface of the middle support member 231, and the guide sliding groove 2334 is an arc-shaped groove formed in the guide sliding portion 2333; the back surface 2332 of the side support member 233 is provided with a plurality of first circular arc rails 2335 on a side away from the middle support member 231, and the first circular arc rails 2335 are used for being rotationally connected to the rotating mechanism 253; the sliding guide portion 233 and the first circular arc rail 2335 are respectively located at two opposite sides of the side support 233. Specifically, each first circular arc rail 2335 is connected to the back surface 2332 of the side support 233 by a connection piece 2336, and the first circular arc rail 2335 is bent from the side support 233 to a side away from the guide slide 233. In this embodiment, the back surface 2332 of the side support 233 is provided with three first circular arc rails 2335, wherein two first circular arc rails 2335 are respectively connected to opposite ends of the side support 233 through connection pieces 2336, and the other first circular arc rail 2335 is connected to the middle of the side support 233 through connection pieces 2336. In other embodiments, the tab 2336 on each first arcuate rail 2335 may be omitted. A plurality of lugs 2337 are convexly arranged on one side of the side supporting piece 233, which is close to the middle supporting piece 231, and the lugs 2337 respectively correspond to the positioning grooves 2315 of the middle supporting piece 231; the side support 233 is provided with a clearance opening 2338 on a side facing the middle support 231. When the two side supporting pieces 233 and the middle supporting piece 231 are in the flattened state, the lugs 2337 are respectively positioned in the positioning grooves 2315, so that the lugs 2337 support the middle supporting piece 231; the two support pieces 2318 of the middle support 231 are respectively received in the two avoidance holes 2338.

Referring to fig. 9-10 and fig. 13-16, the rotating mechanism 253 includes a rotating member 254 and a connecting member 256 connected to the rotating member 254, wherein one end of the rotating member 254 away from the connecting member 256 is rotatably connected to the positioning member 251, and one side of the side supporting member 233 away from the middle supporting member 231 is rotatably connected to the connecting member 256; the linkage 275 is coupled between the positioning member 251 and the connecting member 256. The side supporting piece 233 and the connecting piece 256 are rotatably connected through the matching of the circular arc groove and the circular arc rail, and the positioning piece 251 and the rotating piece 254 are also rotatably connected through the matching of the circular arc groove and the circular arc rail; specifically, the connecting piece 256 is provided with a first circular arc groove 2560 corresponding to the first circular arc rail 2335 of the side supporting piece 233, and the first circular arc rail 2335 is rotatably inserted into the first circular arc groove 2560, so that the connecting piece 256 and the side supporting piece 233 relatively rotate along the first circular arc groove 2560, and the axis of the first circular arc rail 2335 is collinear with the axis of rotation between the side supporting piece 233 and the connecting piece 256; the positioning member 251 is provided with a second arc rail 2512, and the rotating member 254 is provided with a second arc groove 2540 corresponding to the second arc rail 2512, so that the connecting member 256 and the side supporting member 233 relatively rotate along the second arc groove 2540, and the axis of the second arc rail 2512 is collinear with the axis of rotation between the rotating member 254 and the positioning member 251.

Specifically, the positioning member 251 is a rectangular block, and includes a back surface with a circular arc cross section and a front surface 2510 facing away from the back surface, a receiving groove 2511 is provided in the middle of the front surface 2510 of the positioning member 251, and the receiving groove 2511 extends along the length direction of the positioning member 251 and penetrates through two opposite end surfaces of the positioning member 251; the two opposite sides of the positioning piece 251 are respectively provided with a switching groove 2513, the two switching grooves 2513 are arranged on the positioning piece 251 in a staggered manner, each switching groove 2513 penetrates through the front surface 2510, and the switching grooves 2513 are communicated with the accommodating groove 2511; the positioning member 251 is provided with a pair of second arc rails 2512 protruding from two opposite sides of the switching groove 2513, and an opening of the second arc rails 2512 faces the front surface 2510. The positioning member 251 is provided with a receiving slot 2514 corresponding to the sliding guide portion 2333, specifically, the receiving slot 2514 is located at one end of the front surface 2510 of the positioning member 251, and two opposite ends of the receiving slot 2514 respectively penetrate through two opposite side surfaces of the positioning member 251. The positioning member 251 is provided with connection holes 2515 on two opposite sides of the end surface of the positioning member 251 near the receiving slot 2514, wherein each connection hole 2515 penetrates through the receiving slot 2514. The end surface of the positioning member 251 away from the accommodating groove 2514 is provided with two spaced connecting grooves 2516. The front surface 2510 of the positioning member 251 is provided with two countersunk holes 2517, and the two countersunk holes 2517 are positioned on two opposite sides of the accommodating groove 2511. The back of the positioning member 251 is provided with an installation groove 2518 between the two switching grooves 2513, and the middle part of the installation groove 2518 is communicated with the accommodating groove 2511.

The rotating member 254 includes a rotating portion 2541, a fixing portion 2542, and a connecting portion 2543 connected between the rotating portion 2541 and the fixing portion 2542, wherein the rotating portion 2541 is rotatably connected to the positioning member 251, and the fixing portion 2542 is fixedly connected to the connecting member 256. The rotating portion 2541 is a circular arc-shaped block, and a pair of second circular arc grooves 2540 are formed in two opposite side surfaces of the circular arc-shaped block. In this embodiment, the rotating member 254 and the connecting member 256 are integrally formed. The connection portion 2543 is an inclined bar, and opposite ends of the connection portion 2543 are connected to one end of the rotation portion 2541 and one end of the fixing portion 2542, respectively.

The connecting piece 256 is in a strip shape, in this embodiment, the connecting piece 256 is a rectangular rod, two opposite end surfaces of the connecting piece 256 are respectively provided with a first arc groove 2560, one end of the first arc groove 2560 penetrates through the front surface of the connecting piece 256, and the other opposite end penetrates through the side surface of the connecting piece 256, which faces away from the positioning piece 251. The rotating member 254 is fixed to the connecting member 256, specifically, the rotating member 254 and the connecting member 256 may be fixed by, but not limited to, clamping, screwing, cementing, etc. The fixed part 2542 of the rotating member 254 is fixedly connected to the connecting member 256; the back of the connecting piece 256 is provided with a clearance groove 2565 near one end, and the clearance groove 2565 penetrates through two opposite side surfaces and the front surface of the connecting piece 256. The end part of the back surface of the connecting piece 256, which is close to the avoidance groove 2565, is convexly provided with a guide sliding block 2566, and two opposite ends of the guide sliding block 2566 are provided with arc surfaces; the guide sliding block 2566 is provided with an inclined guide sliding groove 2567, and the guide sliding groove 2567 extends obliquely from the front surface to the back surface of the connecting piece 256 and towards the direction approaching the positioning piece 251; preferably, opposite ends of the guide chute 2567 extend in a direction parallel to the rear surface of the connection member 256, and a middle portion of the guide chute 2567 is inclined. The front surface of the connecting piece 256 is provided with a plurality of fixing holes 2568, and the connecting piece 256 is connected to the corresponding frame 21 through the plurality of fixing holes 2568.

It should be noted that, the two rotating mechanisms 253 in the rotating assembly 25 have the same structure except that the fixing positions of the two rotating members 254 and the corresponding two connecting members 256 are different; specifically, the rotating member 254 on one of the connecting members 256 in the rotating assembly 25 is adjacent to the end of the connecting member 256, and the rotating member 254 on the other connecting member 256 is adjacent to the middle of the connecting member 256. In this embodiment, the folding device 22 includes two rotating assemblies 25 and a folding assisting assembly 27, and the folding assisting assembly 27 is connected to one of the rotating assemblies 25, so that the rotating assembly 25 without the folding assisting assembly 27 can omit the guiding sliding block 2566 and the avoiding groove 2565 on the connecting member 256. In some embodiments, the folding device 22 includes two rotating assemblies 25 and two folding-assisting assemblies 27, the two folding-assisting assemblies 27 are respectively connected to the two rotating assemblies 25, and the connecting piece 256 of each rotating assembly 25 has a guiding sliding block 2566 and a avoiding slot 2565.

Referring to fig. 13-16, when the rotating assembly 25 is assembled, the rotating portions 2541 of the two rotating members 254 are respectively inserted into the corresponding switching slots 2513 of the positioning member 251, and the two second arc rails 2512 in each switching slot 2513 are respectively inserted into the corresponding second arc slots 2540, and the second arc rails 2512 rotate along the second arc slots 2540, so that the rotating mechanism 253 is rotatably connected to the positioning member 251, thereby realizing mutual folding or mutual flattening of the two rotating mechanisms 253. When the two rotating mechanisms 253 are mutually flattened, the end part of the rotating part 2541 of the rotating piece 254, which is away from the connecting part 2543, extends out of the switching groove 2513 and is positioned in the accommodating groove 2511; when the two rotating mechanisms 253 are folded over each other, the end of the rotating portion 2541 of the rotating member 254 facing away from the connecting portion 2543 is accommodated in the switching groove 2513.

In some embodiments, the positioning member 251 is provided with a second arc rail 2512 protruding on one side surface of the switching slot 2513, and the rotating portion 2541 of the rotating member 254 is provided with a second arc slot 254 corresponding to the second arc rail 2512; when the rotating portion 2541 is inserted into the switching groove 2513, the second circular arc rail 2512 is inserted into the second circular arc groove 2540.

In some embodiments, the side surface of the switching groove 2513 of the positioning member 251 is provided with a second circular arc groove, and the side surface of the rotating portion 2541 of the rotating member 254 is provided with a second circular arc rail corresponding to the second circular arc groove. Specifically, a pair of second circular arc grooves are formed on two opposite sides of the switching groove 2513, and a pair of second circular arc rails are convexly formed on two opposite sides of the rotating portion 2541 corresponding to the pair of second circular arc grooves, when the rotating portion 2541 is inserted into the switching groove 2513, the pair of second circular arc rails are respectively inserted into the pair of second circular arc grooves; or one side surface of the switching groove 2513 is provided with a second circular arc groove, the side surface of the rotating part 2541 corresponding to the second circular arc groove is convexly provided with a second circular arc rail, and when the rotating part 2541 is inserted into the switching groove 2513, the second circular arc rail is inserted into the second circular arc groove.

Referring to fig. 13-14 and fig. 17-18, the folding device 22 further includes a locking mechanism 24, wherein the locking mechanism 24 is used for connecting the middle supporting member 231 to the rotating assembly 25, specifically, the locking mechanism 24 includes an elastic member 241, a locking member 243 and a propping member 245, the elastic member 241 is connected between the middle supporting member 231 and the positioning member 251, and the elastic member 241 has a pre-elastic force for driving the middle supporting member 231 to approach the positioning member; the locking member 243 is used for connecting the middle supporting member 231 and the positioning member 251, the elastic member 241 is located between the locking member 243 and the positioning member 251, and the abutting member 245 is used for positioning the elastic member 241. In this embodiment, a locking mechanism 24 is disposed between each positioning member 251 and the middle supporting member 231, the elastic member 241 is a spring, the locking member 243 is a screw, the propping member 245 is a positioning plate, a through hole 2450 is formed in the middle of the positioning plate, positioning holes 2452 are respectively formed at two opposite ends of the positioning plate, and the elastic member 241 is positioned in each positioning hole 2452.

Referring to fig. 9-14 and fig. 17-20, the limiting mechanism 270 includes a pushing member 271, a pushing member 272, an elastic component 273 and a positioning member 274 disposed on the linkage mechanism 275, the elastic component 273 provides an elastic force for pushing the pushing member 272 and the pushing member 271 against each other, the rotating mechanism 253 rotates relative to the positioning member 251 through the linkage mechanism 275, the pushing member 271 rotates relative to the pushing member 272, the elastic component 273 is elastically pressed to elastically deform, and the frictional resistance between the pushing member 271 and the pushing member 272 enables the side supporting member 233 to be positioned at a specific angle relative to the middle supporting member 231; the specific angle ranges from 70 degrees to 130 degrees, specifically, when the two side supporting pieces 233 of the folding device 22 are unfolded or folded to be equal to or greater than 70 degrees and less than or equal to 130 degrees by the rotating assembly 25 and the folding assembly 27, the friction assistance between the pushing piece 271 and the holding piece 272 positions the two side supporting pieces 233, i.e. the two side supporting pieces 233 do not rotate relative to each other in the absence of external force. The pushing member 271 includes a first cam 2710, the holding member 272 includes a second cam 2720, and the first cam 2710 and the second cam 2720 are rotatably held against each other; when the first cam 2710 rotates relative to the second cam 2720, the first cam 2710 rotationally pushes the second cam 2720 to slide away from or close to the first cam 2710, the elastic component 273 is pressed, and the friction resistance between the first cam 2710 and the second cam 2720 can limit the pushing piece 271 to a specific angle relative to the holding piece 272. Specifically, the first cam 2710 includes a circular sleeve and a concave-convex surface disposed at one end of the sleeve, the concave-convex surface includes a first protrusion 2714 and a first recess 2715, and the first protrusion 2714 and the first recess 2715 are sequentially arranged at intervals along the circumferential direction of the sleeve. The number of the first protrusions 2714 and the number of the first recesses 2715 may be set as needed, for example, the first cam 2710 may include one first protrusion 2714 and one first recess 2715, two first protrusions 2714 and two first recesses 2715, three first protrusions 2714 and three first recesses 2715, or four first protrusions 2714 and four first recesses 2715, or the like.

The supporting member 272 further includes a connecting portion 2722 and two second cams 2720 disposed at opposite ends of the connecting portion 2722, that is, the two second cams 2720 are disposed at opposite ends of the connecting portion 2722, the rotating shaft 276 is inserted into the second cams 2720, the first cam 2710 rotates relative to the second cams 2720, and the supporting member 272 can slide along the axial direction of the rotating shaft 276. Specifically, the second cam 2720 includes a circular sleeve and a concave-convex surface disposed at one end of the sleeve, where the concave-convex surface includes a second protruding portion 2724 and a second recessed portion 2725, and the second protruding portion 2724 and the second recessed portion 2725 are sequentially arranged at intervals along the circumferential direction of the sleeve; the number of second protrusions 2724 and the number of second recesses 2725 on the second cam 2720 are identical to the number of first recesses 2715 and the number of first protrusions 2714 on the first cam 2710, so that the first protrusions 2714 are engaged with the second recesses 2725 and the second protrusions 2724 are engaged with the first recesses 2715. The connecting portion 2722 is provided with two shaft holes 2726, and the axis of the second cam 2720 is parallel to the axis of the shaft hole 2726. The connecting portion 2722 is provided with two spaced slide guiding holes 2727 along the axial direction of the sleeve of the second cam 2720.

In this embodiment, the limiting mechanism 270 includes two propping members 272, and the two propping members 272 have the same structure except that one of the two propping members 272 has one more slide guiding post 2728. Specifically, the surface of the connecting portion 2722 of the abutment member 272 facing away from the second cam 2720 is provided with a protruding sliding guide post 2728, the sliding guide post 2728 is located between the two sliding guide holes 2727, and the sliding guide post 2728 extends along the axial direction of the sliding guide holes 2727.

The elastic component 273 includes two first elastic members 2731 and a second elastic member 2733 disposed between the two first elastic members 2731, where the two first elastic members 2731 are respectively sleeved on the two rotating shafts 276. In this embodiment, the first elastic member 2731 and the second elastic member 2733 are both springs.

The positioning piece 274 comprises a positioning piece 2741 and two clamping rings 2745, wherein two opposite end surfaces of the positioning piece 2741 are arc surfaces, and two opposite ends of the positioning piece 2741 are respectively provided with a through hole 2742; snap ring 2745 is a C-shaped snap ring.

The linkage 275 includes two rotational shafts 276, link members 277 respectively connected to the two rotational shafts 276, a gear combination 278 between the link members 277, and a fixing member 279, each link member 277 being provided with a first gear 2771 engaging the gear combination 278. Each link 277 is connected to a pushing member 271, and a first cam 2710 is sleeved on the rotating shaft 276. The supporting member 272 includes two second cams 2720, the two second cams 2720 are respectively sleeved on the two rotating shafts 276 in a sliding manner, one ends of the two connecting rod members 277, which are far away from the first cams 2710, are respectively connected to the two connecting members 256, and the connecting rod members 277 rotate along the rotating shafts 276 along with the connecting members 256 relative to the positioning members 251 so as to drive the first cams 2710 to rotate relative to the second cams 2720.

Specifically, the rotating shaft 276 includes a shaft body 2760 and a positioning cover 2762 located at one end of the shaft body 2760, a clamping groove 2763 is provided at an end of the shaft body 2760 far away from the positioning cover 2762, and the clamping groove 2763 is located on an outer peripheral wall of the shaft body 2760 and surrounds a circle along a circumferential direction of the shaft body 2760.

The link member 277 further includes a sleeve 2772 and a link 2773 connected to an outer peripheral wall of the sleeve 2772, the sleeve 2772 is used for being sleeved on the shaft body 2760, the pushing member 271 is connected to one end of the sleeve 2772, specifically, the sleeve of the first cam 2710 is connected to the sleeve 2772, and the sleeve of the first cam 2710 and the sleeve 2772 are coaxial. The first gear 2771 is disposed on the outer peripheral wall of the sleeve 2772, specifically, the first gear 2771 is located on a side facing away from the connecting rod 2773, and the axis of the first gear 2771 is collinear with the axis of the sleeve 2772. In this embodiment, the teeth of the first gear 2771 are arranged in the circumferential direction of the sleeve 2772 with a rotation angle ranging from more than 90 degrees to less than 180 degrees, i.e., the sleeve 2772 is provided with the first gear 2771 on the outer peripheral wall of more than one quarter and less than one half. The pushing member 271 is provided at an end of the sleeve 2772, and an axial line of the sleeve 2772 is collinear with an axial line of the first cam 2710 of the pushing member 271. The sleeve 2772 has a shaft hole, and the rotation shaft 276 is inserted into the shaft hole of the sleeve 2772. The end of the connecting rod 2773 remote from the sleeve 2772 is provided with a shaft hole 2775, and the connecting rod 277 is connected to the connecting piece 256 through the shaft hole 2775.

The gear combination 278 includes two second gears 2782 meshed with each other, the first gears 2771 of the two connecting rod members 277 are respectively meshed with the two second gears 2782, the diameter of the reference circle of the second gears 2782 is smaller than that of the reference circle of the first gears 2771, and the number of teeth of one circle surrounded by the second gears 2782 is smaller than that of teeth of one circle surrounded by the first gears 2771. The diameter of the reference circle of the first gear 2771 is increased by the two second gears 2782 disposed between the two rotating shafts 276 in a certain width and height space of the rotating shafts 276, so that the outer diameter of the first cam 2710 can be increased, a large friction torsion force can be provided between the first cam 2710 and the second cam 2720, and fatigue wear of the first cam 2710 can be reduced, thereby prolonging the service life of the first cam 2710. The middle part of the second gear 2782 is provided with a shaft hole 2784 along the axial direction.

In this embodiment, the linkage 275 includes two pairs of connecting rods 277 and two gear assemblies 278, and a gear assembly 278 is disposed between each pair of connecting rods 277; the two pairs of connecting rod members 277 are disposed on opposite sides of the fixed member 279, respectively.

In some embodiments, linkage 275 may also include only a pair of link members 277 and a gear assembly 278 disposed between the pair of link members 277.

The fixing piece 279 comprises a fixing strip 2790 and two connecting shafts 2795 which are arranged on the fixing strip 2790 and are spaced from each other, the fixing strip 2790 comprises a first fixing block 2791 positioned in the middle of the fixing strip 2790 and two second fixing blocks 2792 positioned at two opposite ends of the first fixing block 2791, and the end faces of the second fixing blocks 2792, which deviate from the first fixing blocks 2791, are arc surfaces. The first fixing block 2791 is provided with two connecting holes along the length direction perpendicular to the fixing strip 2790, the middle parts of the two connecting shafts 2795 are respectively fixedly inserted into the two connecting holes of the first fixing block 2791, and the two connecting shafts 2795 correspond to the two shaft holes 2784 of the gear combination 278. The front of the first fixing block 2791 is provided with a countersunk hole 2793, and the extending direction of the countersunk hole 2793 is perpendicular to the axial lead of the connecting shaft 2795. The second fixing block 2792 is provided with a shaft hole 2794 along the axial direction of the connecting shaft 2795.

As shown in fig. 8-10, the folding device 22 further includes a cover 26, and the positioning member 251 and the fixing member 279 are connected to the cover 26. Specifically, the cover 26 is a bar frame, the cover 26 has two first mounting portions 261 and two second mounting portions 265, the two first mounting portions 261 are located at opposite ends of the cover 26, and the second mounting portion 265 is located in the middle of the cover 26 and is close to one of the first mounting portions 261. The first mounting portion 261 includes a support tube 2611 protruding from an inner surface of the cover 26 and a plurality of support blocks 2612, and the support tube 2611 is provided with a connection hole 2613 along an axial direction thereof. The second mounting portion 265 includes a support post 2651 protruding from an inner surface of the cover 26, and the support post 2651 is provided with a connection hole 2653 along an axial direction thereof.

Referring to fig. 17-20, when assembling the linkage mechanism 275 and the limiting mechanism 270, the ends of the two rotating shafts 276 far from the positioning cover 2762 are respectively inserted into the sleeves of the two second cams 2720 of the supporting member 272 without the sliding guide post 2728 until the supporting member 272 stops on the positioning cover 2762 of the rotating shaft 276; one of the gear combinations 278 is positioned between the pair of link members 277, and two second gears 2782 respectively engage two first gears 2771, wherein two second cams 2720 are positioned on the same side; the ends of the two rotation shafts 276 remote from the positioning cover 2762 are respectively inserted into the sleeves 2772 of the pair of link members 277; at this time, the first cams 2710 of the pair of link members 277 are engaged with the second cams 2720 of the abutment 272. The ends of the two rotating shafts 726 far away from the positioning reversion 2762 are respectively inserted into the two shaft holes 2794 of the fixing piece 279, so that the two connecting shafts 2795 of the fixing piece 279 are respectively inserted into the shaft holes 2784 of the two gear assemblies 278 on the two rotating shafts 276 and the two slide guiding holes 2727 of the supporting piece 272; the other gear assembly 278 is located between the other pair of connecting rod members 277, and the two second gears 2782 respectively engage the two first gears 2771, wherein the two second cams 2720 are located on the same side, the ends of the two rotating shafts 276, which are far away from the positioning cover 2762, are respectively inserted into the sleeves 2772 of the other pair of connecting rod members 277, and the two connecting shafts 279 of the fixing member 279 are respectively inserted into the shaft holes 2784 of the gear assembly 278, at this time, the two pairs of connecting rod members 277 and the corresponding gear assemblies 278 are respectively located on two opposite sides of the fixing member 279. The supporting member 272 with the sliding guide posts 2728 is sleeved on two rotating shafts 276 and two connecting shafts 279 of the fixing member 279, specifically, the two rotating shafts 276 are respectively inserted into sleeves of two second cams 2720 of the supporting member 272, and the connecting shafts 2795 are respectively inserted into two sliding guide holes 2727 of the supporting member 272, at this time, the first cams 2710 of the other pair of connecting rod members 277 are matched with the second cams 2720 of the supporting member 272. The two first elastic pieces 2731 are respectively sleeved on the two rotating shafts 276, the second elastic piece 2733 is sleeved on the slide guiding column 2728, and the second elastic piece 2733 is positioned between the two first elastic pieces 2731; the positioning piece 274 is sleeved on the two rotating shafts 276, namely, the two rotating shafts 276 are respectively inserted into the two through holes 2742 of the positioning piece 274, and the two clamping rings 2745 are respectively clamped in the clamping grooves 2763 of the two rotating shafts 276. At this time, the two snap rings 2745 respectively abut against the side surface of the positioning member 274 facing away from the elastic member 273, and the elastic member 273 is in a pressed state, i.e. the elastic member 273 has a pre-elastic force, and if the first elastic member 2731 has a pre-elastic force F0, the second elastic member 2733 has a pre-elastic force F1; each first cam 2710 is rotatably abutted against the corresponding second cam 2720, namely, the first protruding portion 2714 is accommodated in the second recessed portion 2725, and the second protruding portion 2724 is accommodated in the first recessed portion 2715; the axial force F on the first cam 2710 and the second cam 2720 on each rotating shaft 276 is equal to the sum of half the pre-elastic force F0 of the first elastic member 2731 and half the pre-elastic force F1 of the second elastic member 2733, i.e., f=f0+1/2×f1.

In some embodiments, the first elastic member 2731 and the second elastic member 2733 are of the same model, i.e., the first elastic member 2731 and the second elastic member 2733 are the same, i.e., the first elastic member 2731 and the second elastic member 2733 both have a pre-elastic force F0; the axial force on the first cam 2710 and the second cam and 2720 on each rotational shaft 276 is f=f0×3/2.

In some embodiments, the second elastic member 2733 may be omitted, and the sliding guide post 2728 may be omitted, where the axial direction of the first cam 2710 and the second cam 2720 on each rotation shaft 276 is equal to the pre-elastic force of the first elastic member 2731, i.e. f=f0.

Referring to fig. 6-10 and fig. 21-24, when assembling the folding device 22, the assembled folding assisting component 27 is assembled to the rotating component 25, specifically, the folding assisting component 27 is placed between the connecting pieces 256 of the two rotating mechanisms 253 of the rotating component 25, and the two rotating shafts 276 of the folding assisting component 27 are respectively inserted into the two connecting grooves 2516 of the positioning piece 251 at the end portions far from the positioning cover 2762; the guide sliding blocks 2566 of the two connecting pieces 256 of the rotating assembly 25 connected with the folding assisting assembly 27 are respectively arranged between the two corresponding connecting rods 2773, and the shaft rod 2777 is inserted into the shaft hole 2775 of the connecting rod 2773 and the guide sliding groove 2567 of the guide sliding blocks 2566. The two positioning members 251 are respectively placed on the back surfaces of the middle support member 231 such that the two connection posts 2313 of the middle support member 231 are respectively inserted into the mounting grooves 2518 of the two positioning members 251; the elastic member 241 is placed in the positioning hole 2452 of the propping member 245, and then the propping member 245 and the elastic member 241 are placed in the mounting groove 2518 of the positioning member 251, so that the elastic member 241 is located between the positioning member 251 and the propping member 245, and the locking member 243 is locked in the connecting hole 2314 of the middle supporting member 231 through the through hole 2450 of the propping member 245, so that the elastic member 241 is extruded by the positioning member 251 and the propping member 245 to have an elastic force for pulling the middle supporting member 231 to move towards the positioning member 251. At this time, the middle support 231 is received in the receiving groove 2514 of the positioning member 251. The middle supporting member 231 is connected with the two rotating assemblies 25 and the folding assisting assembly 27 and is placed on the cover body 26, so that the two rotating assemblies 25 respectively correspond to the two first mounting portions 261 of the cover body 26, the folding assisting assembly 27 corresponds to the second mounting portion 265, and a plurality of locking members such as screws respectively penetrate through the counter sunk holes 2517 of the positioning member 251 and the counter sunk holes 2793 of the fixing member 279 to be locked on the corresponding connecting holes 2613 and 2653 on the cover body 26. Two side supporting pieces 233 are placed on two opposite sides of the middle supporting piece 231, two guiding and sliding parts 2333 of each side supporting piece 233 are respectively inserted into the accommodating grooves 2514 of two positioning pieces 251, and a connecting shaft rod 2519 is provided to be inserted into a connecting hole 2515 of the positioning piece 251 and a guiding and sliding groove 2334 of the corresponding guiding and sliding part 2333; the first circular arc rail 2335 of each side support 233 is inserted into the first circular arc groove 2560 of the corresponding connection 256, respectively. When the side supporting members 233 and the middle supporting member 231 are in the flattened state, the end portion of the rotating member 254 away from the connecting member 256 pushes the middle supporting member 231 to enable the side supporting members 233 and the middle supporting member 231 to be side by side, and the lugs 2337 of the side supporting member 233 are respectively inserted into the positioning grooves 2315 of the middle supporting member 231, i.e. the lugs 2337 support the middle supporting member 231.

At this time, the rotation axis between the rotation member 254 and the positioning member 251 is parallel to the rotation axis between the side support member 233 and the connection member 256; the axis of rotation between the rotating member 254 and the positioning member 251 is parallel to the axis of rotation 276, and the axis of rotation between the rotating member 254 and the positioning member 251 is closer to the bendable mechanism 23 than the axis of rotation 276; the axis of the connecting shaft 2519 is parallel to the axis of rotation between the rotating member 254 and the positioning member 251. When the rotation mechanism 253 rotates relative to the positioning member 251, the rotation mechanism 253 drives the side support member 233 to rotate and slide relative to the positioning member 251, so that the side support member 233 and the middle support member 231 are bent or unfolded. Specifically, the rotating member 254 rotates relative to the positioning member 251 with respect to the second circular arc groove 2540 via the second circular arc rail 2512; the link member 277 rotates along the corresponding rotation shaft 276 along with the rotation mechanism 253, so that the first gear 2771 of the link member 277 is rotationally meshed with the second gear 2782 corresponding to the gear combination 278, and the two link members 277 of the linkage mechanism 275 synchronously rotate; the side support member 233 is rotatably connected to the corresponding first circular arc groove 2560 away from the first circular arc rail 2335 of the positioning member 251, and the sliding guide portion 2333 of the side support member 233 slides in the corresponding receiving groove 2514, so that the sliding guide portion 2333 slides and rotationally sleeves the connecting shaft 2519, so as to achieve mutual bending or mutual unfolding of the side support member 233 and the middle support member 231. When the folding device 22 is folded from the flattened state, one connecting piece 256 is folded towards the other connecting piece 256 relative to the positioning piece 251, the one connecting piece 256 rotates relative to the second circular arc rail 2512 of the positioning piece 251 through the second circular arc groove 2540 of the rotating piece 254 so as to drive the corresponding connecting rod piece 277 to rotate along the rotating shaft 276, the rotation of the connecting rod piece 277 drives the corresponding first gear 2771 to rotate, the gear combination 278 drives the corresponding two first gears 2771 to synchronously rotate, and the synchronously rotating first gears 2771 drive the corresponding two connecting rod pieces 277 to synchronously draw close to each other; meanwhile, the connecting piece 256 drives the first arc rail 2335 of the side support piece 233 to be rotationally connected to the corresponding first arc groove 2560, and the sliding guide portion 2333 of the side support piece 233 slides in the corresponding accommodating groove 2514, so that the sliding guide portion 2333 slides and is rotationally sleeved on the connecting shaft 2519; meanwhile, the rotating mechanisms 253 on two opposite sides of the linkage mechanism 275 synchronously rotate relative to the positioning piece 251 to be close to each other, so as to drive the two side supporting pieces 233 to synchronously close to each other until the two side supporting pieces 233 and the middle supporting piece 231 enclose a cross section into a water drop shape.

In the above process, the end of the rotating member 254 away from the connecting member 256 gradually releases the abutment of the centering support member 231, and the elastic force of the elastic member 241 drives the locking member 243 to drive the middle support member 231 to move toward the positioning member 251 until the middle support member 231 is accommodated in the accommodating groove 2511; the axial force on the first cam 2710 and the second cam 2720 on each rotating shaft 276 is equal to the sum of half the elastic force of the first elastic member 2731 and half the elastic force of the second elastic member 2733; the frictional resistance between the first cam 2710 and the second cam 2720 can limit the two side supports 233 to a specific angle between 70 degrees and 130 degrees.

In other usage modes, the two connecting members 256 can be rotated together in opposite directions, and each connecting member 256 can rotate relatively to the second circular arc rail 2512 corresponding to the positioning member 251 through the second circular arc groove 2540 of the corresponding rotating member 254, so as to drive the connecting rod 277 of the linkage mechanism 275 to rotate along the corresponding rotating shaft 276; simultaneously, the two connecting pieces 256 synchronously drive the first circular arc rails 2335 of the side support pieces 233 to be rotationally connected to the corresponding first circular arc grooves 2560, and the sliding guide portions 2333 of the side support pieces 233 slide in the corresponding accommodating grooves 2514, so that the sliding guide portions 2333 slide and are rotationally sleeved on the connecting shaft rod 2519; the rotation of the connecting rod pieces 277 drives the corresponding first gears 2771 to rotate, the gear combination 278 drives the corresponding two first gears 2771 to synchronously rotate, and the synchronously rotating first gears 2771 drive the corresponding connecting rod pieces 277 to synchronously draw close to each other; meanwhile, the rotating mechanisms 253 on two opposite sides of the linkage mechanism 275 synchronously rotate relative to the positioning piece 251 to be close to each other, so as to drive the two side supporting pieces 233 to synchronously close to each other until the two side supporting pieces 233 and the middle supporting piece 231 enclose a cross section into a water drop shape.

When the folding device 22 is unfolded from the fully folded state, one connecting piece 256 is unfolded away from the other connecting piece 256 relative to the positioning piece 251, and the one connecting piece 256 rotates relative to the second circular arc rail of the positioning piece 251 through the second circular arc groove 2540 of the rotating piece 254 so as to drive the corresponding connecting rod piece 277 to rotate along the rotating shaft 276; meanwhile, the connecting piece 256 drives the first arc rail 2335 of the side support piece 233 to be rotationally connected to the corresponding first arc groove 2560, and the sliding guide portion 2333 of the side support piece 233 slides in the corresponding accommodating groove 2514, so that the sliding guide portion 2333 slides and is rotationally sleeved on the connecting shaft 2519; the rotation of the connecting rod pieces 277 drives the corresponding first gears 2771 to rotate, the gear combination 278 drives the corresponding two first gears 2771 to synchronously rotate, and the synchronously rotating first gears 2771 drive the corresponding two connecting rod pieces 277 to synchronously move away from each other; meanwhile, the rotating mechanisms 253 on two opposite sides of the linkage mechanism 275 synchronously rotate relative to the positioning piece 251 to be far away from each other, so as to drive the two side supporting pieces 233 to synchronously spread out from each other until the two side supporting pieces 233 and the middle supporting piece 231 are in a flattened shape.

In the above process, the end of the rotating member 254 away from the connecting member 256 gradually pushes against the middle supporting member 231 to drive the middle supporting member 231 to move away from the positioning member 251, the elastic member 241 is elastically deformed, and the middle supporting member 231 moves out of the accommodating groove 2511 until the middle supporting member 231 is flush with the two side supporting members 233; the axial force on the first cam 2710 and the second cam 2720 on each rotating shaft 276 is equal to the sum of half the elastic force of the first elastic member 2731 and half the elastic force of the second elastic member 2733; the frictional resistance between the first cam 2710 and the second cam 2720 can limit the two side supports 233 to a specific angle between 130 degrees and 70 degrees.

In other usage modes, the two connecting members 256 can be rotated together in a direction away from each other, and each connecting member 256 rotates relatively to the second circular arc rail 2512 corresponding to the positioning member 251 through the second circular arc groove 2540 of the corresponding rotating member 254, so as to drive the connecting rod 277 of the linkage mechanism 275 to rotate along the corresponding rotating shaft 276; simultaneously, the two connecting pieces 256 synchronously drive the first circular arc rails 2335 of the side support pieces 233 to be rotationally connected to the corresponding first circular arc grooves 2560, and the sliding guide portions 2333 of the side support pieces 233 slide in the corresponding accommodating grooves 2514, so that the sliding guide portions 2333 slide and are rotationally sleeved on the connecting shaft rod 2519; the rotation of the connecting rod piece 277 drives the corresponding first gears 2771 to rotate, the gear combination 278 drives the corresponding two first gears 2771 to synchronously rotate, and the synchronously rotating first gears 2771 drive the corresponding connecting rod pieces 277 to synchronously move away from each other; meanwhile, the rotating mechanisms 253 on opposite sides of the linkage 275 synchronously rotate relative to the positioning member 251 to move away from each other, so as to drive the two side supporting members 233 to synchronously move away from each other until the two side supporting members 233 are flush with the middle supporting member 231.

In some embodiments, the second elastic member 2733 may be omitted, and the axial force of the first cam 2710 and the second cam 2720 on each rotation shaft 276 is equal to the elastic force of the first elastic member 2731 during bending or expanding of the linkage 275.

Referring to fig. 1-5 and 24-26, the installed folding device 22 is disposed between two frames 21, the connecting members 256 on opposite sides of the cover 26 are respectively accommodated in the accommodating grooves 216 of the two frames 21, and the connecting members 256 are disposed on the corresponding fixing strips 217, such that the fixing holes 2568 of the connecting members 256 are respectively opposite to the connecting holes 2170 of the frames 21; the locking members such as screws are respectively inserted through the connecting holes 2170 and locked in the corresponding fixing holes 2568, so that the two frames 21 are respectively and fixedly connected to the corresponding connecting members 256. At this time, the front faces of the two frames 21, the front faces of the two side supports 233, and the front faces of the middle support 231. The back of the flexible member 30 is connected to the front of the two frames 21 and the front of the bendable mechanism 23, the bendable region 31 faces the bendable mechanism 23, and the two non-bendable regions 33 face the front of the two frames 21, respectively. When the flexible member 30 is in the flattened state, the end of the rotating member 254 remote from the connecting member 256 abuts against the middle support 231, the middle support 231 is flush with the two side supports 233, and the first cam 2710 and the second cam 2720 are mutually abutted to define that the bendable mechanism 23 is kept in the flattened state; because the front of the mechanism 23 of can bending is the complete face, there is no level difference in middle part support 231, consequently, the flexible piece 30 can not receive the impact of level difference department when flattening, and the flexible piece 30 can not appear various points, bright spot etc. bad problem, guarantees the reliability of flexible piece 30, simultaneously, also promotes the touch feel of flexible piece 30, improves user's use experience.

Referring to fig. 27-33, when the electronic device 100 is folded, a folding force is applied to at least one of the two frames 21 of the electronic device 100, so that the rotating mechanisms 253 connected to the two frames 21 rotate in directions adjacent to each other, the folding device 22 is folded by the folding assisting component 27, and the bendable region 31 of the flexible member 30 is folded along with the bendable mechanism 23. Specifically, if a bending force is applied to one of the frames 21, the one of the frames 21 drives the corresponding rotating mechanism 253 to rotate towards a side close to the flexible member 30 relative to the positioning member 251, so as to drive the corresponding connecting rod member 277 to rotate along the rotating shaft 276, the rotation of the connecting rod member 277 drives the corresponding first gear 2771 to rotate, the gear combination 278 drives the corresponding two first gears 2771 to synchronously rotate, and the synchronously rotating first gears 2771 drive the corresponding two connecting rod members 277 to synchronously draw close to each other; meanwhile, the connecting piece 256 drives the first arc rail 2335 of the side support piece 233 to be rotationally connected to the corresponding first arc groove 2560, and the sliding guide portion 2333 of the side support piece 233 is slidingly and rotationally sleeved on the connecting shaft 2519; meanwhile, the rotating mechanisms 253 on two opposite sides of the linkage mechanism 275 synchronously rotate relative to the positioning piece 251 to draw together to drive the two side supporting pieces 233 to synchronously draw together to enable the folding device 22 to be in a bending state, the bendable region 31 of the flexible piece 30 is bent along with the folding device 22 until the front faces of the two non-bending regions 33 of the flexible piece 30 are mutually attached, and the bendable region 31 is bent into a water drop shape, so that seamless folding of the electronic equipment 100 is realized.

In the above process, the end of the rotating member 254 away from the connecting member 256 gradually releases the abutment of the centering support member 231, and the middle support member 231 moves toward the positioning member 251 until the middle support member 231 is accommodated in the accommodating groove 2511, so as to increase the space for accommodating the bendable region 31, and avoid the middle support member 231 abutting against the bendable region 31, thereby eliminating the need for lifting the screen during the folding process of the flexible member 30, and improving the folding life of the flexible member 30; the sum of the frictional torque between the first cam 2710 and the second cam 2720 on each rotation shaft 276 is greater than the rebound force of the flexible member 30 to enable the relative positioning between the two side supporting members 233 at a specific angle, enabling the two frames 21 to be limited at a specific angle between 70 degrees and 130 degrees. That is, if the rebound force of the flexure 30 is M0, within a certain angular range (70 ° -130 °), it is ensured that the total friction torque M is greater than or equal to the sum of the rebound force and the hover safety torque increment, that is, M+.gtoreq.M0+ΔM, where ΔM is the hover safety torque increment. The bendable region 31 of the flexible member 30 is bent to enclose a water drop shape, and the duty ratio of the bent bendable region 31 is reduced, so that the overall thickness of the electronic device 100 can be reduced.

In other bending modes of the electronic device 100, bending forces can be applied to the two frames 21 at the same time, and the two frames 21 respectively drive the two rotating mechanisms 253 to rotate towards the side close to the flexible member 30, and the bending of the electronic device 100 can be realized through the folding device 22.

When it is necessary to flatten the electronic apparatus 100, one of the frames 21 is pulled outward, so that the two rotating mechanisms 253 connected to the two frames 21 are rotated in directions away from each other. Specifically, an outward pulling force is applied to one of the frames 21 of the electronic device 100, where the one frame 21 drives the corresponding rotating mechanism 253 to rotate relative to the positioning member 251 toward a side far away from the flexible member 30, so as to drive the corresponding connecting rod member 277 to rotate along the rotating shaft 276, the rotation of the connecting rod member 277 drives the corresponding first gear 2771 to rotate, the gear combination 278 drives the corresponding two first gears 2771 to synchronously rotate, and the synchronously rotating first gears 2771 drive the corresponding two connecting rod members 277 to synchronously move away from each other; meanwhile, the connecting piece 256 drives the first arc rail 2335 of the side support piece 233 to be rotationally connected to the corresponding first arc groove 2560, and the sliding guide portion 2333 of the side support piece 233 is slidingly and rotationally sleeved on the connecting shaft 2519; simultaneously, the rotating mechanisms 253 on two opposite sides of the linkage mechanism 275 synchronously rotate relative to the positioning piece 251 to be away from each other so as to drive the two side supporting pieces 233 to synchronously move away from each other to be flattened, so that the folding device 22 is unfolded, and the bendable region 31 of the flexible piece 30 is unfolded along with the folding device 22 until the flexible piece 30 is flattened.

In the above process, the end of the rotating member 254 away from the connecting member 256 gradually pushes the middle supporting member 231, so that the middle supporting member 231 moves away from the positioning member 251 until the middle supporting member 231 is flush with the two side supporting members 233, and the middle supporting member 231 and the side supporting members 233 are used for supporting the bendable region 31, i.e. after the flexible member 30 is flattened, the bendable region 31 and the middle supporting member 231 are gapless, so that the flexible member 30 can be prevented from being damaged, and the folding life of the flexible member 30 is prolonged; the sum of the frictional torque between the first cam 2710 and the second cam 2720 on each rotation shaft 276 is greater than the rebound force of the flexible member 30 to enable the relative positioning between the two side supporting members 233 at a specific angle, enabling the two frames 21 to be limited at a specific angle between 130 degrees and 70 degrees.

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

According to the folding device 22 of the electronic device 100, the synchronous bending or unfolding is realized through the rotating assembly 25 and the folding assisting assembly 27, and the elastic assembly 273 of the limiting mechanism 270 of the folding assisting assembly 27 can provide a larger axial force, so that a larger friction torsion exists between the first cam 2710 and the second cam 2720; therefore, the total friction torque force of the folding device 22 formed by the friction torque force between the first cam 2710 and the second cam 2720 is large enough to realize a specific angle between 70 degrees and 130 degrees of bending limit of the electronic equipment 100, and realize the hovering function of the whole machine. In addition, the folding assisting component 27 and the rotating component 25 of the folding device 22 are fixedly connected with the connecting slot 2516 of the positioning component 251 through the rotating shaft 276, the connecting rod 277 and the connecting component 256 are connected with the connecting rod 2773 and the guiding sliding block 2566 through the shaft rod 2777, and two sides of the side supporting component 233 are respectively connected with the positioning component 251 and the connecting component 256, so that the folding device 22 is firm in structure, and the overall strength of the electronic equipment 100 is improved.

In some embodiments, the second elastic member 2733 of each folding assisting component 27 may be omitted, in which case the friction torsion between the first cam 2710 and the second cam 2720 is greater than the rebound force of the bendable region 31 of the flexible member 30, so that the two side supporting members 233 are relatively positioned at a specific angle.

In some embodiments, the number of first and second cams and the number of friction members of the fold-assist assembly 27 can be modified to accommodate different gauges and stacks of flexible members.

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

Claims

1. A folding device, the folding device comprising:

the bendable mechanism comprises two side support pieces, wherein the side support pieces are provided with guide sliding parts, and the guide sliding parts are provided with guide sliding grooves; and

the rotating assembly comprises a positioning piece and two rotating mechanisms respectively arranged at two opposite sides of the positioning piece, the sliding guide part is connected with the positioning piece through a connecting shaft rod, the positioning piece is provided with a containing groove corresponding to the sliding guide part, the connecting shaft rod is connected to two opposite side surfaces of the containing groove, and the sliding guide part is sleeved on the connecting shaft rod in a sliding and rotating manner; one end of the rotating mechanism is rotationally connected with the positioning piece, the other end of the rotating mechanism far away from the positioning piece is rotationally connected with the corresponding side supporting piece, and one side of the side supporting piece is rotationally and slidingly connected with the positioning piece; when the rotating mechanism rotates relative to the positioning piece, the rotating mechanism drives the side supporting pieces to rotate and slide relative to the positioning piece, so that the two side supporting pieces are mutually bent or mutually unfolded.

2. The folding apparatus according to claim 1, wherein the rotation mechanism includes a rotation member and a connection member connected to the rotation member, an end of the rotation member remote from the connection member is rotatably connected to the positioning member, and a side of the side support member remote from the positioning member is rotatably connected to the connection member.

3. The folding device of claim 2, wherein a rotational axis between the rotational member and the positioning member is parallel to a rotational axis between the side support member and the connecting member.

4. A folding device according to claim 3, wherein the side support member is provided with a first circular arc rail, and the connecting member is provided with a first circular arc groove corresponding to the first circular arc rail; or the side support piece is provided with a first arc groove, and the connecting piece is provided with a first arc rail corresponding to the first arc groove; the axis of the first circular arc rail is collinear with the axis of rotation between the side support and the connecting piece.

5. The folding device according to claim 3, wherein a transfer groove is formed in the side portion of the positioning member, the transfer groove penetrates through the front face of the positioning member, a second circular arc rail is convexly arranged on the side surface of the transfer groove, and a second circular arc groove corresponding to the second circular arc rail is formed on the side surface of the rotating member; or a second arc groove is formed in the side face of the switching groove, and a second arc rail corresponding to the second arc groove is convexly arranged on the side face of the rotating piece; the axis of the second circular arc rail is collinear with the axis of rotation between the rotating piece and the positioning piece.

6. The folding device according to claim 2, wherein the connecting shaft is inserted into the guide chute and positioned on the positioning member, and an axis of the connecting shaft is parallel to an axis of rotation between the rotating member and the positioning member.

7. The folding device of claim 2, wherein the bendable mechanism further comprises a middle support member positioned between two of the side support members, the side support members being rotatably and slidably coupled to the positioning members on a side proximate to the middle support member, the side support members being rotatably coupled to the corresponding coupling members on a side distal from the middle support member; when the two side supporting pieces and the middle supporting piece are in a flattened state, the end part of the rotating piece, which is far away from the connecting piece, is propped against the middle supporting piece; when the two side supporting pieces and the middle supporting piece are in a bending state, the end part of the rotating piece, which is far away from the connecting piece, is released from abutting against the middle supporting piece.

8. The folding device of claim 7, wherein an elastic member is disposed between the middle support member and the positioning member, and the elastic member has a pre-elastic force that drives the middle support member toward the positioning member.

9. The folding device of claim 8, wherein a locking member is disposed between the central support member and the positioning member, and the elastic member is disposed between the locking member and the positioning member.

10. The folding apparatus of claim 7 wherein a side of said side support member adjacent said middle support member is provided with a plurality of lugs, said lugs supporting said middle support member when both of said side support members are in a flattened condition with said middle support member.

11. The folding device of claim 2, further comprising a folding assist assembly comprising a linkage mechanism coupled between the positioning member and the connecting member, the rotation mechanism being synchronized to rotate relative to the positioning member by the linkage mechanism.

12. The folding apparatus according to claim 11, wherein the foldable mechanism further comprises a middle support member, the middle support member is located between the two side support members, the folding assisting assembly further comprises a limiting mechanism, the limiting mechanism comprises a pushing member, a pushing member and an elastic member, the pushing member, the elastic member and the elastic member are arranged on the linkage mechanism, the elastic member provides elastic force for pushing the pushing member and the pushing member against each other, the rotation mechanism rotates relative to the positioning member through the linkage mechanism, the pushing member rotates relative to the pushing member, the elastic member is elastically pressed to elastically deform, and frictional resistance between the pushing member and the pushing member enables the side support member to be positioned at a specific angle relative to the middle support member.

13. The folding device of claim 12, wherein the specific angle ranges from 70 degrees to 130 degrees between the two side supports.

14. The folding device of claim 12, wherein the abutment comprises a first cam and the abutment comprises a second cam, the first cam and the second cam being rotatably abutted against each other.

15. The folding device of claim 14, wherein the folding device is configured to support a flexible member, and wherein a frictional torque between the first cam and the second cam is greater than a repulsive force of the flexible member to position the two side support members at a specific angle therebetween.

16. The folding device of claim 12, wherein the limiting mechanism further comprises a positioning member, and the elastic member is pressed between the positioning member and the abutting member, so that the elastic member has an elastic force that causes the abutting member and the abutting member to abut against each other.

17. The folding device according to claim 14, wherein the linkage mechanism comprises two rotating shafts, connecting rod members respectively connected to the two rotating shafts, and a gear combination between the connecting rod members, each connecting rod member is provided with a first gear engaged with the gear combination, each connecting rod member is connected with the pushing member, so that the first cam is sleeved on the rotating shaft, the pushing member comprises two second cams, the two second cams are respectively sleeved on the two rotating shafts in a sliding manner, and the connecting rod member rotates along the rotating shafts along with the rotating members to drive the first cams to rotate relative to the second cams.

18. A folding housing, characterized in that the folding housing comprises a folding device and two frames according to any one of claims 1-17, the folding device is located between the two frames, the two frames are respectively connected to two rotating mechanisms of the folding device, the frames drive the rotating mechanisms to rotate relative to the positioning pieces, and the bendable mechanism bends or expands synchronously along with the rotating mechanisms and a linkage mechanism.

19. An electronic device, comprising a flexible member and the folding housing of claim 18, wherein the flexible member is disposed on the folding housing, and the flexible member bends or is flat with the folding housing.