Rotating shaft device, folding shell and electronic equipment

Abstract

The invention provides a rotating shaft device which comprises a pair of connecting shafts which are arranged in parallel at intervals, a first connecting rod piece connected to one connecting shaft, a second connecting rod piece connected to the other connecting shaft and a linkage assembly, and the linkage assembly is arranged between the first connecting rod piece and the second connecting rod piece and comprises a first linkage piece and a second linkage piece. The first linkage piece and the first connecting rod piece are connected through cooperation of a first spiral groove and a first sliding part, the first linkage piece and the second connecting rod piece are connected through cooperation of a second spiral groove and a second sliding part, and the rotating direction of the first spiral groove is opposite to the rotating direction of the second spiral groove. When the first connecting rod piece or the second connecting rod piece rotates around the axis of the corresponding connecting shaft, the first sliding part slides along the first spiral groove, and meanwhile, the second sliding part slides along the second spiral groove, so that the first connecting rod piece and the second connecting rod piece synchronously and reversely rotate to be mutually folded or mutually unfolded. The invention further provides a folding shell provided with the rotating shaft device and electronic equipment.

Description

Technical Field

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

[0002] With the development of display equipment, foldable flexible display screens have appeared. Folding screen devices equipped with foldable flexible display screens are becoming more and more popular due to their unique shape and diverse functions. At present, the folding schemes of foldable flexible display screens include inner folding and outer folding. The existing inner folding schemes generally include U-shaped inner folding and teardrop-shaped inner folding. The foldable flexible display screens of folding screen devices in related technologies are generally supported by a rotating shaft device, and the rotating shaft device generally adopts gear transmission to achieve synchronous folding or synchronous unfolding of the rotating shaft device. However, with the development trend of miniaturization and thinness of the rotating shaft device, the size of the gears needs to be smaller and smaller, which not only increases the difficulty of processing and manufacturing, resulting in higher costs, but also makes the gears more susceptible to wear. Summary of the invention

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

[0004] The present application provides a rotating shaft device, which includes a pair of spaced-apart parallel connecting shafts, a first connecting rod connected to one of the connecting shafts, a second connecting rod connected to the other connecting shaft, and a linkage assembly, wherein the linkage assembly is arranged between the first connecting rod and the second connecting rod, and the linkage assembly includes a first linkage member, the first linkage member and the first connecting rod are connected by a first spiral groove and a first sliding portion, and the first linkage member and the second connecting rod are connected by a second spiral groove and a second sliding portion, and the rotation direction of the first spiral groove is opposite to that of the second spiral groove; when the first connecting rod or the second connecting rod rotates around the axis of the corresponding connecting shaft, the first sliding portion slides along the first spiral groove, and at the same time, the second sliding portion slides along the second spiral groove, so that the first connecting rod and the second connecting rod rotate synchronously in opposite directions and fold or unfold with each other.

[0005] The present application also provides a folding shell, which includes a rotating shaft device and two frames, wherein the rotating shaft device is located between the two frames, and opposite sides of the rotating shaft device are respectively connected to the two frames.

[0006] The present application also provides an electronic device, which includes a flexible screen, two frames and a hinge device, wherein the hinge device is located between the two frames, the opposite sides of the hinge device are respectively connected to the two frames, and the flexible screen is connected to the front of the two frames and the front of the hinge device.

[0007] The first linkage member and the first connecting rod member of the rotating shaft device of the present invention are connected by the cooperation of the first spiral groove and the first sliding part, and the first linkage member and the second connecting rod member are connected by the cooperation of the second spiral groove and the second sliding part, and the rotation direction of the first spiral groove is opposite to the rotation direction of the second spiral groove; when the first connecting rod member or the second connecting rod member rotates around the axis of the connecting shaft, the first sliding part and the second sliding part slide along the first spiral groove and the second spiral groove respectively, so as to realize the synchronous folding or synchronous unfolding of the first connecting rod member and the second connecting rod member; compared with the related technology that adopts gear transmission to realize the synchronous folding or unfolding of the rotating shaft device, the manufacturing of the rotating shaft device is simple, the production cost is low, and the problem of gear wear is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the implementation. Obviously, the drawings described below relate to some implementations of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work.

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

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

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

[0012] Figure 4 yes Figure 3 A schematic diagram of a three-dimensional structure explosion of the rotating shaft device;

[0013] Figure 5 yes Figure 4 A schematic diagram of the three-dimensional structure of the rotating shaft device from another perspective;

[0014] Figure 6 yes Figure 4 An enlarged view of the first folding aid mechanism;

[0015] Figure 7 yes Figure 6 A schematic diagram of a three-dimensional structure decomposition of the first folding aid mechanism;

[0016] Figure 8 yes Figure 7 A further exploded schematic diagram of the first folding aid mechanism;

[0017] Fig. 9yes Figure 8 A further decomposed schematic diagram of the first folding aid mechanism from another perspective;

[0018] Fig.10 yes Figure 8 A schematic diagram of a three-dimensional structure explosion of the linkage mechanism, the first abutting member, the second abutting member, the first elastic member, the second elastic member, the positioning member and a pair of connecting shafts;

[0019] Fig.11 yes Fig.10 A schematic diagram of a three-dimensional structure explosion from another perspective of the linkage mechanism, the first abutting member, the second abutting member, the first elastic member, the second elastic member, the positioning member and a pair of connecting shafts;

[0020] Fig.12 yes Fig.10 A further three-dimensional structural decomposition diagram of the linkage mechanism in FIG.

[0021] Fig.13 yes Fig.12 A schematic diagram of a three-dimensional structure of the linkage mechanism from another perspective;

[0022] Fig.14 yes Figure 6 A schematic diagram of the front structure of the first folding aid mechanism;

[0023] Fig.15 yes Figure 6 A three-dimensional cross-sectional view of the first folding aid mechanism;

[0024] Fig.16 yes Figure 6 Another three-dimensional cross-sectional view of the first folding aid mechanism;

[0025] Fig.17 yes Figure 6 Another three-dimensional cross-sectional view of the first folding aid mechanism;

[0026] Fig.18 yes Figure 6 Another three-dimensional cross-sectional view of the first folding aid mechanism;

[0027] Fig.19 yes Figure 6 Another three-dimensional cross-sectional view of the first folding aid mechanism;

[0028] Fig. 20 yes Figure 4 A schematic diagram of the three-dimensional structure of the second folding aid mechanism;

[0029] Fig.21 yes Fig. 20 A schematic diagram of a three-dimensional structure decomposition of the second folding aid mechanism;

[0030] Fig. 22 yes Fig.21 A further exploded schematic diagram of the three-dimensional structure of the second folding aid mechanism;

[0031] Fig.23 yes Fig. 22 A schematic diagram of a three-dimensional structure explosion of the linkage mechanism, the first abutting member, the second abutting member, the first elastic member and a pair of connecting shafts;

[0032] Fig.24 yes Figure 1 A schematic diagram of a three-dimensional structure of an electronic device in a fully folded state;

[0033] Fig.25 yes Fig.24 A schematic diagram of the three-dimensional structure of the electronic device in FIG.

[0034] Fig.26 yes Fig.25 A schematic diagram of the three-dimensional structure of the rotating shaft device and the flexible screen;

[0035] Fig. 27 yes Fig.26 Schematic diagram of further three-dimensional structural decomposition of the hinge device and flexible screen.

[0036] Main markings:

[0037] 100, electronic device; 20, folding housing; 21, frame; 211, front; 213, back; 214, side; 215, end face; 216, mounting groove; 22, rotating shaft device; 260, connecting shaft; 2601, shaft body; 2603, cover body; 2605, snap-in groove; 221, base; 2210, adjustment rod; 222, first base; 223, first anti-slip plate; 2231, first shaft hole; 2232, first connecting hole; 2234, first anti-slip plate; 2235, positioning block; 2236, first positioning surface; 2237, second positioning surface; 224, first support bar; 225, mounting portion; 2251, first protrusion; 2252, first arc groove; 2253, second protrusion; 22 54, second arc groove; 2256, first rotation-assisting groove; 2257, second rotation-assisting groove; 2258, guide slide block; 226, second seat body; 227, second anti-slip plate; 2271, second axial hole; 2272, second connecting hole; 2274, second anti-slip plate; 228, second support bar; 229, second mounting portion; 2292, through hole; 23, support mechanism; 231, side support member; 2310, first rotating rail; 2315, limiting groove; 2315a, first limiting section; 2315b, second limiting section; 2317, positioning groove; 2317a, first end; 2317b, second end; 234, middle support member; 2340, adjustment groove; 2341, first positioning section; 2343, second positioning section ; 2345, middle section; 24, first folding aid mechanism; 24a, second folding aid mechanism; 240, first abutting member; 241, first sleeve; 2410, first axial hole; 242, first top cam; 2421, third protrusion; 2423, third recess; 244, second elastic member; 245, gasket; 2451, annular gasket; 2453, first connecting strip; 246, second abutting member; 2460, second top cam; 2461, second sleeve; 2462, fourth protrusion; 2464, fourth recess; 2465, second axial hole; 248, third elastic member; 249, snap-on piece; 2491, C-shaped buckle; 2493, second connecting strip; 250, first rotating mechanism; 251, first Rotating member; 2511, first circular arc rail; 2512, first rotating part; 2514, first connecting part; 2515, first sleeve; 2515a, first axial hole; 252, first connecting member; 2520, first slide groove; 2521, first transfer part; 2522, first rotating groove; 2523, first guide slide part; 2524, first avoidance opening; 2525, first connecting hole; 2526, first guide groove; 2527, first positioning rod; 2528, first avoidance opening; 253, first transfer shaft; 255, second rotating mechanism; 256, second rotating member; 2561, second circular arc rail; 2562, second rotating part; 2564, second connecting part; 2565, second sleeve; 2565a, second axial hole;257, second connecting member; 2570, second slide groove; 2571, second transfer part; 2572, second rotating groove; 2573, second guide slide part; 2574, second avoidance opening; 2575, second connecting hole; 2576, second guide groove; 2577, second positioning rod; 2578, second avoidance opening; 258, second transfer shaft; 26, synchronization mechanism; 260, connecting shaft; 2601, shaft body; 2603, cover body; 2605, clamping groove; 26 1. first connecting rod; 2610. first spiral groove; 2611. first rotating part; 2613. third spiral groove; 2614. first rotating hole; 2615. first connecting rod; 2615a. first slide rail; 2615b. first stop rod; 2616. first positioning groove; 2617. first cam; 2617a. first protrusion; 2617b. first recess; 263. second connecting rod; 2630. second spiral groove; 2631. second rotating part 2633, fourth spiral groove; 2634, second rotating hole; 2635, second connecting rod; 2635a, second slide rail; 2636, second positioning groove; 2637, second cam; 2637a, second protrusion; 2637b, second recess; 265, linkage assembly; 266, first linkage member; 2661, first sliding portion; 2663, second sliding portion; 2665, first moving portion; 2667, first sliding hole; 267, second linkage moving part; 2671, third sliding part; 2673, fourth sliding part; 2675, second moving part; 2677, second sliding hole; 268, first elastic part; 269, guide slide shaft; 27, positioning part; 272, positioning part; 2721, third arc groove; 275, connecting part; 2724, connecting column; 276, guide slide groove; 29, back shell; 291, positioning part; 293, positioning column; 30, flexible screen; 31, bendable area; 33, non-bending area. ; DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In addition, the description of each embodiment below is with reference to the attached diagrams to illustrate specific embodiments that the present application can be implemented. The directional terms mentioned in the present application, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only with reference to the directions of the attached figures. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set on..." should be understood in a broad sense, for example, it can be a fixed connection, or it can be detachably connected, or connected in one piece; it can be a mechanical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of 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.

[0040] Please also read Figures 1 to 5An electronic device 100 in one embodiment of the present invention includes a folding shell 20 and a flexible screen 30 arranged on the folding shell 20. The folding shell 20 includes two frames 21 and a hinge device 22 arranged between the two frames 21. The opposite sides of the hinge device 22 are respectively connected to the two frames 21. The flexible screen 30 is connected to the front sides of the two frames 21 and the front side of the hinge device 22. The flexible screen 30 can be bent or unfolded along with the hinge device 22. The rotating shaft device 22 includes a supporting mechanism 23, a first folding-assisting mechanism 24, a second folding-assisting mechanism 24a and a back shell 29. The first folding-assisting mechanism 24 and the second folding-assisting mechanism 24a are arranged between the back shell 29 and the supporting mechanism 23. The rotating shaft device 22 includes a synchronization mechanism 26. The synchronization mechanism 26 includes a pair of spaced connecting shafts 260, a first connecting rod 261 connected to one of the connecting shafts 260, a second connecting rod 263 connected to the other connecting shaft 260, and a linkage assembly 265. The first connecting rod 261 and the second connecting rod 263 are respectively connected to the pair of connecting shafts 260; the linkage assembly 265 is arranged between the first connecting rod 261 and the second connecting rod 263, and the linkage assembly 265 includes a first linkage member 266. The first linkage member 266 and the first connecting rod 261 are connected by a first spiral groove 26 10 is connected with the first sliding part 2661, the first linkage part 266 and the second link member 263 are connected with the second sliding part 2663 through the second spiral groove 2630, and the rotation direction of the first spiral groove 2610 is opposite to the rotation direction of the second spiral groove 2630; when the first link member 261 or the second link member 263 rotates around the axis of the corresponding connecting shaft 260, the first sliding part 2661 slides along the first spiral groove 2610, and at the same time, the second sliding part 2663 slides along the second spiral groove 2630, so that the first link member 261 and the second link member 263 rotate synchronously in opposite directions and fold or unfold with each other, so as to realize the folding or unfolding of the hinge device 22, and the two frames 21 are synchronously folded or unfolded through the hinge device 22, so that the flexible screen 30 can be bent or unfolded. The first folding-assisting mechanism 24 and the second folding-assisting mechanism 24a are respectively provided with a synchronization mechanism 26. The first connecting rod 261 and the second connecting rod 263 of the first folding-assisting mechanism 24 and the second folding-assisting mechanism 24a are rotated synchronously through a linkage assembly 265 so as to be folded or unfolded with each other.

[0041] At least one first folding-assisting mechanism 24 and at least one second folding-assisting mechanism 24a are provided on the back of the support mechanism 23. In this embodiment, two first folding-assisting mechanisms 24 and one second folding-assisting mechanism 24a are provided on the back of the support mechanism 23, wherein one first folding-assisting mechanism 24 and the second folding-assisting mechanism 24a are respectively located at opposite ends of the back of the support mechanism 23, and another first folding-assisting mechanism 24 is located between the first folding-assisting mechanism 24 and the second folding-assisting mechanism 24a. In some embodiments, only one first folding-assisting mechanism 24 and one second folding-assisting mechanism 24a may be provided on the back of the support mechanism 23, and the first folding-assisting mechanism 24 and the second folding-assisting mechanism 24a are respectively located at opposite ends of the support mechanism 23. In some embodiments, only two first folding-assisting mechanisms 24 may be provided on the back of the support mechanism 23, and the two first folding-assisting mechanisms 24 are respectively located at opposite ends of the support mechanism 23. In some embodiments, only two second folding-assisting mechanisms 24a may be provided on the back of the support mechanism 23, and the two second folding-assisting mechanisms 24a are respectively located at opposite ends of the support mechanism 23. In some embodiments, more than three folding-assisting mechanisms may be disposed on the back side of the support mechanism 23 , and the three folding-assisting mechanisms are arranged along the length direction of the support mechanism 23 .

[0042] In this embodiment, the front side refers to the side facing the same direction as the light-emitting surface of the flexible screen 30, and the back side refers to the side facing away from the light-emitting surface of the flexible screen 30. The electronic device 100 is, for example, but not limited to, a mobile phone, a tablet computer, a display, a liquid crystal panel, an OLED panel, a television, a smart watch, a VR head-mounted display, a car display, or any other product or component with a display function. The flexible screen 30 can be, but not limited to, a flexible display screen, a flexible touch screen, a flexible touch display screen, or other flexible components with corresponding functions, or a flexible component fixedly bonded to a flexible support plate, such as a flexible display screen bonded to a flexible steel plate, a flexible touch screen, etc.

[0043] The back side of the support mechanism 23 of the hinge device 22 of the present invention is provided with a first folding-assisting mechanism 24 and a second folding-assisting mechanism 24a. The first connecting rod 261 and the second connecting rod 263 of the first folding-assisting mechanism 24 are synchronized and folded or flattened through a linkage assembly 265. Meanwhile, the first connecting rod 261 and the second connecting rod 263 of the second folding-assisting mechanism 24a are synchronized and folded or unfolded through a linkage assembly 265. Thus, the support mechanism 23 is folded or unfolded to drive the bendable area 31 to bend or unfold, and the two frames 21 of the electronic device 100 are synchronized and folded or unfolded. The first linkage member 266 of the rotating shaft device 22 of the present invention is connected to the first connecting rod member 261 through the cooperation of the first spiral groove 2610 and the first sliding portion 2661, and the first linkage member 266 is connected to the second connecting rod member 263 through the cooperation of the second spiral groove 2630 and the second sliding portion 2663, and the rotation direction of the first spiral groove 2610 is opposite to that of the second spiral groove 2630; in this embodiment, the first sliding portion 2661 and the second sliding portion 2663 are arranged on the first linkage member 266, the first spiral groove 2610 is arranged on the first connecting rod member 261, and the second spiral groove 2630 is arranged on the second connecting rod member 263. When the first connecting rod 261 or the second connecting rod 263 rotates around the axis of the connecting shaft 260, the first sliding portion 2661 and the second sliding portion 2663 slide along the first spiral groove 2610 and the second spiral groove 2630 respectively, so that the first connecting rod 261 and the second connecting rod 263 can be synchronously folded or unfolded; compared with the related technology that uses gear transmission to achieve synchronous folding or unfolding of the rotating shaft device, the synchronization mechanism 26 is simple to manufacture, has a lower production cost, and avoids the problem of gear wear.

[0044] The frame 21 includes a front face 211, a back face 213, two opposite side faces 214 and two end faces 215. The hinge device 22 is connected between two adjacent side faces 214 of the two frames 21. The bendable area 31 of the flexible screen 30 is attached to the front face of the hinge device 22, and the non-bending area 33 of the flexible screen 30 is connected to the front face 211 of the frame 21. A mounting groove 216 is provided on one side of the front face 211 of each frame 21 close to the hinge device 22. The mounting groove 216 passes through the front face 211 of the frame 21, and the opposite ends of the mounting groove 216 extend to the opposite end faces 215 close to the frame 21. The opposite sides of the hinge device 22 are respectively accommodated in the mounting grooves 216 of the two frames 21. Optionally, a plurality of connection holes are provided on the back face 213 of the frame 21 close to the hinge device 22, each connection hole is connected to the mounting groove 216, and the plurality of connection holes are arranged along the length direction of the mounting groove 216. The back of the frame 21 is provided with a plurality of receiving spaces (not shown in the figure), and the receiving spaces are used to install electronic components such as circuit boards, batteries, speakers, receivers, cameras or buttons.

[0045] The rotating shaft device 22 also includes a base 221, a first rotating mechanism 250 rotatably connected to one side of the base 221, and a second rotating mechanism 255 rotatably connected to the other side of the base 221, and a pair of connecting shafts 260 are arranged on opposite sides of the base 221; specifically, the first folding-assisting mechanism 24 and the second folding-assisting mechanism 24a respectively include a base 221, a first rotating mechanism 250, a second rotating mechanism 255 and a pair of connecting shafts 260, the first rotating mechanism 250 and the second rotating mechanism 255 are respectively rotatably connected to opposite sides of the base 221, a pair of connecting shafts 260 are respectively connected to opposite sides of the base 221, a linkage assembly 265 is arranged between the pair of connecting shafts 260, the first connecting rod 261 is connected to one of the connecting shafts 260, and the second connecting rod 263 is connected to the other connecting shaft 260. The support mechanism 23 includes a pair of side support members 231 and a pair of middle support members 234. The pair of middle support members 234 are located between the pair of side support members 231. Each middle support member 234 is rotatably connected to the adjacent side support members 231. One side of the side support member 231 away from the middle support member 234 is rotatably connected to the first rotating mechanism 250 through the cooperation of the first rotating rail 2310 and the first rotating groove 2522. The other side support member 231 away from the middle support member 234 is rotatably connected to the second rotating mechanism 250 through the cooperation of the first rotating rail 2310 and the first rotating groove 2522. The rotating mechanisms 255 are rotatably connected through the cooperation of the first rotating rail 2310 and the second rotating groove 2572. The rotation axis between each side support member 231 and the corresponding middle support member 234, the rotation axis between the first rotating mechanism 250 and the corresponding side support member 231, the rotation axis between the second rotating mechanism 255 and the corresponding side support member 231, the rotation axis between the first rotating mechanism 250 and the base 221, and the rotation axis between the second rotating mechanism 255 and the base 221 are parallel to each other. A pair of middle support members 234 are respectively located on opposite sides of the base 221, and the pair of middle support members 234 are respectively connected to the base 221 through the cooperation of the adjustment rod 2210 and the adjustment groove 2340; when the pair of side support members 231 and the pair of middle support members 234 are in a flattened state, the two adjustment rods 2210 are respectively positioned at the two first positioning sections 2341; when the pair of side support members 231 and the pair of middle support members 234 are in a folded state, the two adjustment rods 2210 are respectively positioned at the two second positioning sections 2343.

[0046] During the folding process of the hinge device 22, the two side supports 231 rotate respectively relative to the first rotating mechanism 250 and the second rotating mechanism 255, the two middle supports 234 rotate respectively relative to the two side supports 231, and the two middle supports 234 slide and rotate respectively relative to the base 221 until the adjusting rod 2210 is positioned at the second positioning section 2343. The two middle supports 234 are tilted relative to the base 221, which increases the space for accommodating the flexible screen 30, reduces the bending stress of the flexible screen 30, avoids display failure of the flexible screen 30, improves the reliability of the flexible screen 30, and extends the service life of the flexible screen 30.

[0047] Optionally, the first rotating mechanism 250 includes a first rotating member 251 and a first connecting member 252 rotatably connected to the first rotating member 251, and one end of the first rotating member 251 away from the first connecting member 252 is rotatably connected to the base 221; the rotation axis between the first rotating member 251 and the first connecting member 252 and the rotation axis between the first rotating member 251 and the base 221 are parallel to the axis of the connecting shaft 260. The second rotating mechanism 255 includes a second rotating member 256 and a second connecting member 257 rotatably connected to the second rotating member 256, and one end of the second rotating member 256 away from the second connecting member 257 is rotatably connected to the base 221; the rotation axis between the second rotating member 256 and the second connecting member 257 and the rotation axis between the second rotating member 256 and the base 221 are parallel to the axis of the connecting shaft 260.

[0048] Please also read Figure 6-Figure 13The base 221 includes a first base body 222 and a second base body 226, the first base body 222 and the second base body 226 are arranged at intervals along the axial direction of the connecting shaft 260, the first base body 222 includes a first stop plate 223, the second base body 226 includes a second stop plate 227, and a pair of connecting shafts 260 are connected to opposite ends of the first stop plate 223 and opposite ends of the second stop plate 227. Specifically, the first base body 222 also includes a first support bar 224 and a mounting portion 225, the first stop plate 223 is provided at one end of the first support bar 224, and the mounting portion 225 is provided at the other end opposite to the first support bar 224. The front side of the mounting portion 225 is provided with a first protrusion 2251 and a second protrusion 2253 on opposite sides of one end away from the first stop plate 223, respectively; the first protrusion 2251 is provided with a first arc groove 2252 on the side facing the first stop plate 223, and the end of the first arc groove 2252 passes through the front side of the first protrusion 2251; the second protrusion 2253 is provided with a second arc groove 2254 on the side facing the first stop plate 223, and the end of the second arc groove 2254 passes through the front side of the second protrusion 2253; the axis of the first arc groove 2252 is parallel to the axis of the second arc groove 2254. The first rotation-assisting groove 2256 and the second rotation-assisting groove 2257 are respectively provided on opposite sides of the front surface of the mounting portion 225. Optionally, the inner surfaces of the first rotation-assisting groove 2256 and the second rotation-assisting groove 2257 are provided with arc surfaces. The axis of the first rotation-assisting groove 2256 is collinear with the axis of the first arc groove 2252, and the axis of the second rotation-assisting groove 2257 is collinear with the axis of the second arc groove 2254. Two adjustment rods 2210 are respectively provided on opposite sides of the end surfaces of the first protrusion 2251 and the second protrusion 2253 away from the first anti-sliding plate 223, and the axes of the two adjustment rods 2210 are parallel to the axis of the first arc groove 2252. The mounting portion 225 also includes two guide sliders 2258, which are respectively provided on opposite sides of the first support bar 224, and the guide sliders 2258 are parallel to the length direction of the first support bar 224, and the two guide sliders 2258 are close to one end of the mounting portion 225.

[0049] The first stop plate 223 is provided with two first axial holes 2231 and a first connecting hole 2232, the two first axial holes 2231 are located at the opposite ends of the first stop plate 223, and the first connecting hole 2232 is located between the two first axial holes 2231; specifically, the first stop plate 223 is generally a rectangular plate, and the opposite ends of the first stop plate 223 respectively extend from the opposite sides of the first support bar 224 to form two first anti-slip plates 2234, each first anti-slip plate 2234 is provided with a first axial hole 2231 along the length direction of the first support bar 224, and the first connecting hole 2232 is provided in the middle of the rectangular plate, and the axis of the first axial hole 2231 is parallel to the axis of the connecting shaft 260. The first stop plate 223 has positioning blocks 2235 at opposite ends thereof, and the two first axial holes 2231 respectively penetrate the two positioning blocks 2235, and the positioning blocks 2235 include a first positioning surface 2236 and a second positioning surface 2237. The first positioning surface 2236 and the second positioning surface 2237 on each positioning block 2235 are located around the corresponding first axial hole 2231, and the first positioning surface 2236 is away from the side of the first support bar 224, and the second positioning surface 2237 is close to the side of the first support bar 224.

[0050] The second seat body 226 further includes a second support bar 228 and a second mounting portion 229. The second stop plate 227 is disposed at one end of the second support bar 228, and the second mounting portion 229 is disposed at the other end opposite to the second support bar 228. The second stop plate 227 is provided with two second shaft holes 2271 and a second connecting hole 2272. The two second shaft holes 2271 are located at opposite ends of the second stop plate 227, and the second connecting hole 2272 is located between the two second shaft holes 2271. Specifically, the second stop plate 227 is generally a rectangular plate, and the opposite ends of the second stop plate 227 extend from opposite sides of the second support plate 228 to form two second stop plates 2274. Each second stop plate 2274 is provided with a second shaft hole 2271 along the length direction of the second support bar 228. The second connecting hole 2272 is disposed in the middle of the rectangular plate, and the axis of the second shaft hole 2271 is parallel to the axis of the connecting shaft 260. In other embodiments, positioning blocks may be respectively provided at opposite ends of the second anti-slip plate 227, and two second shaft holes 2271 respectively penetrate through the two positioning blocks, each positioning block includes a first positioning surface and a second positioning surface, and the first positioning surface and the second positioning surface on each positioning block are located around the corresponding first shaft hole 2231, the first positioning surface is away from the side of the second support bar 228, and the second positioning surface is close to the side of the second support bar 228. The second mounting portion 229 is a rectangular plate, and the opposite ends of the second mounting portion 229 extend out of the opposite sides of the second support bar 228, respectively. Two adjustment rods 2210 are respectively provided at opposite ends of the same side of the second mounting portion 229, and through holes 2292 are respectively provided at opposite ends of the second mounting portion 229 along the axial direction of the adjustment rod 2210. In other embodiments, positioning blocks may also be respectively provided at the opposite ends of the first stop plate 223, and the two first axial holes 2231 respectively pass through the two positioning blocks. The positioning blocks include a first positioning surface and a second positioning surface. The first positioning surface and the second positioning surface on each positioning block are located around the corresponding first axial hole. The first positioning surface is away from the side of the first support bar 224, and the second positioning surface is close to the side of the first support bar 224.

[0051] One end of the first rotating member 251 away from the first connecting member 252 is rotatably connected to the base 221 through the cooperation of the first arc groove and the first arc track, the first arc groove is provided on one of the first rotating member 251 and the base 221, and the first arc track is provided on the other of the first rotating member 251 and the base 221. In this embodiment, the first arc groove 2252 is provided on the first protrusion 2251 of the base 221, and the first rotating member 251 is provided with a first arc track 2511, and the first arc track 2511 is rotatably connected to the first arc groove 2252. Specifically, the first rotating member 251 includes a first rotating portion 2512 and a first connecting portion 2514, and the first rotating portion 2512 and the first connecting portion 2514 are respectively arranged at opposite ends of the first rotating member 251; the first circular arc track 2511 is arranged at the end of the first rotating portion 2512, and the end of the first connecting portion 2514 away from the first rotating portion 2512 is rotatably connected to the first connecting member 252 through the first adapter shaft 253. In this embodiment, the first circular arc tracks 2511 are respectively arranged at opposite ends of the first rotating portion 2512, and the two first circular arc tracks 2511 are coaxial. Optionally, the first rotating portion 2512 is a first semi-cylinder, and the first semi-cylinder is respectively provided with first circular arc tracks 2511 at opposite ends along its axial direction. Further, the axis of the first circular arc track 2511 is coaxial with the first semi-cylinder. Optionally, the outer circumference of the first circular arc track 2511 is coplanar with the outer circumference of the first semi-cylinder. Two first lugs spaced apart from each other are provided on one side of the first connecting portion 2514 away from the first rotating portion 2512. A first sleeve 2515 is provided on one end of each first lug away from the first rotating portion 2512. The first sleeve 2515 is provided with a first axial hole 2515a along its axial direction. The two first sleeves 2515 are coaxial.

[0052] The structure of the second rotating member 256 is the same as that of the first rotating member 251. Specifically, the second rotating member 256 includes a second rotating portion 2562 and a second connecting portion 2564. The second rotating portion 2562 and the second connecting portion 2564 are respectively located at opposite ends of the second rotating member 256. The second circular arc track 2561 is provided at the end of the second rotating portion 2562. The end of the second connecting portion 2564 away from the second rotating portion 2562 is rotatably connected to the second connecting member 257. The second rotating member 256 and the base 221 are rotatably connected through the cooperation of the second circular arc groove and the second circular arc track. The second circular arc groove is provided in one of the second rotating member 256 and the base 221, and the second circular arc track is provided in the other of the second rotating member 256 and the base 221. In this embodiment, a second arc groove 2254 is provided on the second protrusion 2253 of the base 221, and a second arc track 2561 is provided on the second rotating member 256, and the second arc track 2561 is rotatably connected to the second arc groove 2254; specifically, the second arc track 2561 is provided at the end of the second rotating portion 2562, and the end of the second connecting portion 2564 away from the second rotating portion 2562 is rotatably connected to the second connecting member 257 through the second adapter shaft 258. In this embodiment, the second arc tracks 2561 are respectively provided at the opposite ends of the second rotating portion 2562, and the two second arc tracks 2561 are coaxial. Optionally, the second rotating portion 2562 is a second semi-cylinder, and the second arc tracks 2561 are respectively provided at the opposite ends of the second semi-cylinder along its axial direction. Optionally, the axis of the second arc track 2561 is coaxial with the second semi-cylinder. Two second lugs spaced apart from each other are provided on one side of the second connecting portion 2564 away from the second rotating portion 2562. A second sleeve 2565 is provided on one end of each second lug away from the second rotating portion 2562. The second sleeve 2565 is provided with a second axial hole 2565a along its axial direction. The two second sleeves 2565 are coaxial.

[0053] The first connecting member 252 is in the shape of a strip, and first rotating grooves 2522 are respectively provided at two opposite ends of one side of the first connecting member 252 away from the first rotating member 251. The first connecting member 252 includes a first adapter portion 2521 and a first guide portion 2523 provided at two opposite ends thereof; one of the first rotating grooves 2522 is provided at the end surface of the first adapter portion 2521 away from the first guide portion 2523, and the other first rotating groove 2522 is provided at the end surface of the first guide portion 2523 away from the first connecting portion 2521. The first connecting portion 2514 of the first rotating member 251 is rotatably connected to the first adapter portion 2521, and the first guide portion 2523 is provided with a first slide groove 2520 along a direction perpendicular to the length of the first connecting member 252, and the first link member 261 is slidably connected to the first slide groove 2520. Specifically, two first avoidance openings 2524 are provided at intervals on the front side of the first adapter part 2521, and the first adapter part 2521 is provided with a first connecting hole 2525 along the length direction of the first connecting member 252, and the first connecting hole 2525 connects the two first avoidance openings 2524; the two first avoidance openings 2524 are used to respectively accommodate two first sleeves 2515; when the two first sleeves 2515 are rotatably accommodated in the two first avoidance openings 2524, the first axial hole 2515a is coaxial with the first connecting hole 2525, the first adapter shaft 253 is penetrated through the first connecting hole 2525 and the first axial hole 2515a, and the first adapter shaft 253 has an interference fit or interference fit with the inner surface of the first connecting hole 2525 to play a tightening role. A first guide groove 2526 is provided on the front of the first guide slide 2523, and opposite ends of the first guide groove 2526 respectively penetrate opposite sides of the first guide slide 2523, and one end of the first link member 261 away from the base 221 is slidably accommodated in the first guide groove 2526; first slide grooves 2520 are provided on opposite inner sides of the first guide groove 2526, and opposite ends of the first slide groove 2520 respectively penetrate opposite sides of the first guide slide 2523. In this embodiment, first slide grooves 2520 are provided on opposite inner sides of the first guide groove 2526. A first positioning rod 2527 is provided at one end of the first connecting member 252 near the first rotating member 251, and a positioning groove 2317 is provided on the side support member 231, and the axis of the first positioning rod 2527 is parallel to the axis of the first connecting hole 2525, and the first positioning rod 2527 is rollably penetrated in the positioning groove 2317. A first escape opening 2528 is defined on a side of the first connecting member 252 away from the first rotating member 251 and close to each first rotating groove 2522 .

[0054] The second connecting member 257 is in a strip shape, and the second connecting member 257 is provided with second rotation grooves 2572 at two opposite ends of one side away from the second rotating member 256. The second connecting member 257 includes a second adapter portion 2571 and a second guide slide portion 2573, and the second adapter portion 2571 and the second guide slide portion 2573 are respectively provided at two opposite ends of the second connecting member 257; one second rotation groove 2572 is provided at one end of the second adapter portion 2571 away from the second guide slide portion 2573, and the other second rotation groove 2572 is provided at one end of the second guide slide portion 2573 away from the second adapter portion 2571. The second connecting member 2564 is rotatably connected to the second adapter portion 2571, and the second guide slide portion 2573 is provided with a second slide groove 2570 along a direction perpendicular to the length of the second connecting member 257, and the second link member 263 is slidably connected to the second slide groove 2570. Specifically, two second avoidance openings 2574 are provided at intervals on the front of the second adapter 2571, and the second adapter 2571 is provided with a second connection hole 2575 along the length direction of the second connection member 257, and the second connection hole 2575 communicates with the two second avoidance openings 2574; the two second avoidance openings 2574 are used to respectively accommodate the two second sleeves 2565. When the two second sleeves 2565 are rotatably accommodated in the two second avoidance openings 2574, the second shaft hole 2565a is coaxial with the second connection hole 2575, and the second adapter shaft 258 is penetrated through the second connection hole 2575 and the second shaft hole 2565a, and the second adapter shaft 258 and the inner surface of the second connection hole 2575 are interference fit or interference fit to play a fastening role. A second guide groove 2576 is provided on the front of the second guide slide 2573, and the opposite ends of the second guide groove 2576 respectively penetrate the opposite side surfaces of the second guide slide 2573, and the end of the second link member 263 away from the base 221 is slidably accommodated in the second guide groove 2576; the opposite inner sides of the second guide groove 2576 are respectively provided with second slide grooves 2570, and the opposite ends of the second slide groove 2570 respectively penetrate the opposite side surfaces of the second guide slide 2573. A second positioning rod 2577 is provided at one end of the second connecting member 257 near the second rotating member 256, and a positioning groove 2317 is provided on the side support member 231. The axis of the second positioning rod 2577 is parallel to the axis of the second connecting hole 2575, and the second positioning rod 2577 is rollably penetrated in the positioning groove 2317. A second avoidance opening 2578 is provided on the side of the second connecting member 257 away from the second rotating member 256 near each second rotating groove 2572.

[0055] Each connecting shaft 260 includes a shaft body 2601 and a cover body 2603 disposed at one end of the shaft body 2601. A clamping groove 2605 is disposed at one end of the outer circumference of the shaft body 2601 away from the cover body 2603. The clamping groove 2605 is disposed in a circle around the circumference of the shaft body 2601. In this embodiment, the cover body 2603 is a circular cover, and the diameter of the cover body 2603 is smaller than the inner diameter of the through hole 2292 of the base 221.

[0056] like Figure 8-Figure 13 As shown, the first connecting rod 261 includes a first rotating portion 2611 rotatably connected to one of the connecting shafts 260 and a first connecting rod portion 2615 connected to the first rotating portion 2611. The first spiral groove 2610 is opened in the first rotating portion 2611. Specifically, the first spiral groove 2610 is provided at one end of the outer peripheral surface of the first rotating portion 2611; the first rotating portion 2611 is a first rotating cylinder rotatably sleeved on the connecting shaft 260, and the first rotating cylinder is provided with a first rotating hole 2614 along its axial direction. The first connecting rod portion 2615 is a rectangular first connecting rod plate, and the first connecting rod plate is connected to the outer peripheral surface of the first rotating cylinder through a connecting plate. The second connecting rod member 263 includes a second rotating portion 2631 rotatably connected to another connecting shaft 260 and a second connecting rod portion 2635 connected to the second rotating portion 2631, and the second spiral groove 2630 is opened in the second rotating portion 2631. Specifically, the second spiral groove 2630 is arranged at one end of the outer peripheral surface of the second rotating portion 2631; the second rotating portion 2631 is a second rotating cylinder rotatably sleeved on the connecting shaft 260, and the second rotating cylinder is provided with a second rotating hole 2634 along its axial direction, and the second connecting rod portion 2635 is a rectangular second connecting rod plate, and the second connecting rod plate is connected to the outer peripheral surface of the second rotating cylinder through a connecting plate.

[0057] Optionally, the linkage assembly 265 further includes a second linkage member 267, and the second linkage member 267 is connected to the first rotating portion 2611 through the cooperation of the third spiral groove 2613 and the third sliding portion 2671; the second linkage member 267 is connected to the second rotating portion 2631 through the cooperation of the fourth spiral groove 2633 and the fourth sliding portion 2673. In this embodiment, the third sliding portion 2671 and the fourth sliding portion 2673 are provided on the second linkage member 267, the third spiral groove 2613 is provided at the other end of the first rotating portion 2611, and the fourth spiral groove 2633 is provided at the other end of the second rotating portion 2631. That is, the first spiral groove 2610 and the third spiral groove 2613 are arranged at intervals from each other along the axial direction of the connecting shaft 260 on the side of the outer peripheral surface of the first rotating part 2611 away from the first connecting rod part 2615, and the second spiral groove 2630 and the fourth spiral groove 2633 are arranged at intervals from each other along the axial direction of the connecting shaft 260 on the side of the outer peripheral surface of the second rotating part 2631 away from the second connecting rod part 2635. The rotation direction of the third spiral groove 2613 is opposite to that of the fourth spiral groove 2633, the rotation direction of the first spiral groove 2610 is opposite to that of the third spiral groove 2613, and the rotation direction of the second spiral groove 2630 is opposite to that of the fourth spiral groove 2633. When the first connecting rod 261 or the second connecting rod 263 rotates around the axis of the corresponding connecting shaft 260, the first sliding portion 2661 of the first linkage member 266 slides along the first spiral groove 2610, and the second sliding portion 2663 slides along the second spiral groove 2630. At the same time, the third sliding portion 2671 of the second linkage member 267 slides along the third spiral groove 2613, and the fourth sliding portion slides along the fourth spiral groove 2633, so that the first linkage member 266 and the second linkage member 267 move closer to or away from each other.

[0058] Optionally, the first spiral groove 2610 includes a first end and a second end, the first end is away from one end of the first connecting rod portion 2615, and the second end is close to the first connecting rod portion 2615; the second spiral groove 2630 includes a first end and a second end, the first end is away from the second connecting rod portion 2635, and the second end is close to the second connecting rod portion 2635; the third spiral groove 2613 includes a first end and a second end, the first end is away from one end of the first connecting rod portion 2615, and the second end is close to the first connecting rod portion 2615; the fourth spiral groove 2633 includes a first end and a second end, the first end is away from the second connecting rod portion 2635, and the second end is close to the second connecting rod portion 2635. When the first link member 261 and the second link member 263 are in a flattened state, the first sliding portion 2661 and the second sliding portion 2663 of the first linkage member 266 are respectively positioned at the first end of the first spiral groove 2610 and the first end of the second spiral groove 2630, and the third sliding portion 2671 and the fourth sliding portion 2673 of the second linkage member 267 are respectively positioned at the first end of the third spiral groove 2613 and the first end of the fourth spiral groove 2633. When the first link member 261 and the second link member 263 are in a fully folded state, the first sliding portion 2661 and the second sliding portion 2663 of the first linkage member 266 are respectively positioned at the second end of the first spiral groove 2610 and the second end of the second spiral groove 2630, and the third sliding portion 2671 and the fourth sliding portion 2673 of the second linkage member 267 are respectively positioned at the second end of the third spiral groove 2613 and the second end of the fourth spiral groove 2633.

[0059] Optionally, when the rotating shaft device is in a flattened state, the distance between the end of the first spiral groove 2610 close to the first connecting rod portion 2615 and the end of the third spiral groove 2613 close to the first connecting rod portion 2615 is smaller than the distance between the end of the first spiral groove 2610 away from the first connecting rod portion 2615 and the end of the third spiral groove 2613 away from the first connecting rod portion 2615; that is, the distance between the first end of the first spiral groove 2610 and the first end of the third spiral groove 2613 is larger than the distance between the second end of the first spiral groove 2610 and the first end of the third spiral groove 2613. The distance between the two ends; the distance between the end of the second spiral groove 2630 close to the second connecting rod part 2635 and the end of the fourth spiral groove 2633 close to the second connecting rod part 2635 is smaller than the distance between the end of the second spiral groove 2630 away from the second connecting rod part 2635 and the end of the fourth spiral groove 2633 away from the second connecting rod part 2635; that is, the distance between the first end of the second spiral groove 2630 and the first end of the fourth spiral groove 2633 is larger than the distance between the second end of the second spiral groove 2630 and the second end of the fourth spiral groove 2633.

[0060] Optionally, the first spiral groove 2610, the second spiral groove 2630, the third spiral groove 2613 and the fourth spiral groove 2633 can all be but not limited to arc-shaped grooves, rectangular grooves, triangular grooves, trapezoidal grooves or elliptical grooves, that is, the cross-section of each spiral groove can be arc-shaped, rectangular, triangular, trapezoidal or elliptical, etc.; in this embodiment, the first spiral groove 2610, the second spiral groove 2630, the third spiral groove 2613 and the fourth spiral groove 2633 are all arc-shaped grooves.

[0061] Optionally, the first rotating portion 2611 is provided with a first positioning groove 2616 along the radial direction of the connecting shaft 260, and the second rotating portion 2631 is provided with a second positioning groove 2636 along the radial direction of the connecting shaft 260, and the relative ends of the first stop plate 223 and the second stop plate 227 are respectively accommodated in the first positioning groove 2616 and the second positioning groove 2636, and the relative ends of the guide sliding shaft 269 are connected to the first stop plate 223 and the second stop plate 227. In this embodiment, two first positioning grooves 2616 are provided on the side of the outer circumference of the first rotating portion 2611 away from the first connecting rod portion 2615, and the two first positioning grooves 2616 are located at opposite ends of the first connecting rod portion 2615, and the first spiral groove 2610 and the third spiral groove 2613 are located between the two first positioning grooves 2616 of the first rotating portion 2611; two second positioning grooves 2636 are provided on the side of the outer circumference of the second rotating portion 2631 away from the second connecting rod portion 2635, and the two second positioning grooves 2636 are located at opposite ends of the second connecting rod portion 2635, and the second spiral groove 2630 and the fourth spiral groove 2633 are located between the two second positioning grooves 2636 of the second rotating portion 2631.

[0062] The first link member 261 and the first connecting member 252 are connected by the cooperation of the slide groove and the slide rail, the length direction of the slide groove is perpendicular to the rotation axis of the first rotating member and the base 221, the slide groove is provided in one of the first link member 261 and the first connecting member 252, and the slide rail is provided in the other of the first link member 261 and the first connecting member 252. Specifically, first slide rails 2615a are provided on opposite sides of the first link part 2615, the length direction of the first slide rail 2615a is perpendicular to the axis of the first rotating hole 2614, and the first slide rail 2615a is slidably inserted in the first slide groove 2520 of the first connecting member 252. First cams 2617 are provided at opposite ends of the first rotating part 2611, and the axes of the two first cams 2617 and the axis of the first rotating part 2611 are collinear. The first cam 2617 includes a concave-convex surface provided at the end of the first rotating cylinder, and the concave-convex surface includes first protrusions 2617a and first recesses 2617b arranged in sequence along the circumference of the first rotating cylinder; the number of first protrusions 2617a and the number of first recesses 2617b can be set as needed, such as the first cam 2617 can include one first protrusion 2617a and one first recess 2617b, two first protrusions 2617a and two first recesses 2617b, three first protrusions 2617a and three first recesses 2617b, or four first protrusions 2617a and four first recesses 2617b. In this embodiment, the first cam 2617 includes three first protrusions 2617a and three first recesses 2617b arranged in sequence along the circumference of the first rotating cylinder. The first rotating portion 2611 is provided with a non-slip groove connected to the first rotating hole 2614 . Specifically, the non-slip groove is located on the outer peripheral surface of the first rotating portion 2611 and extends along the radial direction of the first rotating portion 2611 to the first connecting rod portion. The first connecting rod 261 and the side support member 231 are connected by the cooperation of the limiting rod and the limiting groove. The axis of the limiting rod is parallel to the rotation axis between the middle support member 234 and the side support member 231. The limiting rod is arranged at one of the first connecting rod 261 and the side support member 231, and the limiting groove is arranged at the other of the first connecting rod 261 and the side support member 231. In this embodiment, the first connecting rod 261 is provided with a first limiting rod 2615b, and the side support member 231 is provided with a limiting groove 2315. Optionally, a first limiting rod 2615b is arranged at one end of the first connecting rod portion 2615 which is away from the first sliding rail 2615a and away from the first rotating portion 2611. The axis of the first limiting rod 2615b is parallel to the axis of the first rotating portion 2611, and the first limiting rod 2615b can be rotatably inserted in the limiting groove 2315.

[0063] The second link member 263 and the second connecting member 257 are connected by the cooperation of the slide groove and the slide rail, the length direction of the slide groove is perpendicular to the rotation axis of the second rotating member 256 and the base 221, the slide groove is provided in one of the second link member 263 and the second connecting member 257, and the slide rail is provided in the other of the second link member 263 and the second connecting member 257. Specifically, the second slide rails 2635a are provided on the opposite sides of the second link part 2635, the length direction of the second slide rail 2635a is perpendicular to the axis of the second rotating hole 2634, and the second slide rail 2635a is slidably inserted in the second slide groove 2570 of the second connecting member 257. The second cams 2637 are provided at the opposite ends of the second rotating part 2631, and the axes of the two second cams 2637 and the axis of the second rotating part 2631 are collinear. The second cam 2637 includes a concave-convex surface provided at the end of the second rotating cylinder, and the concave-convex surface includes second protrusions 2637a and second recesses 2637b arranged in sequence along the circumference of the second rotating cylinder; the number of second protrusions 2637a and the number of second recesses 2637b can be set as needed, such as the second cam 2637 can include one second protrusion 2637a and one second recess 2637b, two second protrusions 2637a and two second recesses 2637b, three second protrusions 2637a and three second recesses 2637b, or four second protrusions 2637a and four second recesses 2637b. In this embodiment, the second cam 2637 includes three second protrusions 2637a and three second recesses 2637b arranged in sequence along the circumference of the second rotating cylinder. The second rotating part 2631 is provided with a non-slip groove connected to the second rotating hole 2634. Specifically, the non-slip groove is located on the outer peripheral surface of the second rotating part 2631 and extends to the second connecting rod part 2635 along the radial direction of the second rotating part 2631. The second connecting rod 263 and the side support member 231 are connected by the cooperation of the limiting rod and the limiting groove. The axis of the limiting rod is parallel to the rotation axis between the middle support member 234 and the side support member 231. The limiting rod is provided on one of the second connecting rod 263 and the side support member 231, and the limiting groove is provided on the other of the second connecting rod 263 and the side support member 231. In this embodiment, the second connecting rod 263 is provided with a second limiting rod 2635b, and the side support member 231 is provided with a limiting groove 2315.

[0064] like Fig.12 and Fig.13As shown, the first linkage 266 also includes a first moving part 2665, a first sliding part 2661 and a second sliding part 2663 are arranged on the first moving part 2665, and in this embodiment, the first sliding part 2661 and the second sliding part 2663 are arranged on opposite sides of the first moving part 2665. Specifically, the first moving part 2665 is a first cylinder, and the first cylinder is provided with a first sliding hole 2667 along its axial direction; the first sliding part 2661 is a first sliding rod protrudingly arranged on the outer peripheral surface of the first moving part 2665; preferably, the first sliding part 2661 and the second sliding part 2663 are symmetrical about the axis of the first cylinder; the end surface of the first sliding part 2661 away from the first moving part 2665 is set as a first guide sliding surface; the second sliding part 2663 is a second sliding rod protrudingly arranged on the outer peripheral surface of the first moving part 2665, and the end surface of the second sliding part 2663 away from the first moving part 2665 is set as a second guide sliding surface. The second linkage member 267 further includes a second moving portion 2675, a third sliding portion 2671 and a fourth sliding portion 2673 are arranged on the second moving portion 2675, and in this embodiment, the third sliding portion 2671 and the fourth sliding portion 2673 are arranged on opposite sides of the second moving portion 2675. Specifically, the second moving portion 2675 is a second cylinder, and the second cylinder is provided with a second sliding hole 2677 along its axial direction; the third sliding portion 2671 is a third sliding rod protrudingly arranged on the outer circumference of the second moving portion 2675, and preferably, the third sliding portion 2671 and the fourth sliding portion 2673 are symmetrical about the axis of the second cylinder; the end surface of the third sliding portion 2671 away from the second moving portion 2675 is set as a third guide sliding surface; the fourth sliding portion 2673 is a fourth sliding rod protrudingly arranged on the outer circumference of the second moving portion 2675, and the end surface of the fourth sliding portion 2673 away from the second moving portion 2675 is set as a fourth guide sliding surface.

[0065] In other embodiments, the first sliding portion 2661 and the second sliding portion 2663 may also be asymmetrical, the first spiral groove 2610 and the second spiral groove 2630 may be asymmetrical, and the first sliding portion 2661 and the second sliding portion 2663 may be slidably accommodated in the first spiral groove 2610 and the second spiral groove 2630, respectively; the third sliding portion 2671 and the fourth sliding portion 2673 may also be asymmetrical, the third spiral groove 2613 and the fourth spiral groove 2633 may be asymmetrical, and the third sliding portion 2671 and the fourth sliding portion 2673 may be slidably accommodated in the third spiral groove 2613 and the fourth spiral groove 2633, respectively.

[0066] Optionally, the first guide surface of the first sliding part 2661, the second guide surface of the second sliding part 2663, the third guide surface of the third sliding part 2671 and the fourth guide surface of the fourth sliding part 2673 are all arc-shaped surfaces, rectangular surfaces, triangular surfaces, trapezoidal surfaces or elliptical surfaces, that is, the cross-section of each spiral groove can be arc-shaped, rectangular, triangular, trapezoidal or elliptical, etc.; in this embodiment, the first guide surface, the second guide surface, the third guide surface and the fourth guide surface are all arc-shaped surfaces.

[0067] Optionally, the linkage assembly 265 further includes a first elastic member 268 and a guide slide shaft 269, wherein the first elastic member 268 is located between the first linkage member 266 and the second linkage member 267, and the first elastic member 268 is used to push the first linkage member 266 and the second linkage member 267 along the axial direction parallel to the connecting shaft 260. The axis of the guide slide shaft 269 is parallel to the axis of the connecting shaft 260, and the first linkage member 266 and the second linkage member 267 are slidably sleeved on the guide slide shaft 269 along the axial direction of the guide slide shaft 269, that is, the guide slide shaft 269 can pass through the first sliding hole 2667 of the first moving part 2665 and the second sliding hole 2677 of the second moving part 267. Preferably, the first elastic member 268 is sleeved on the guide slide shaft 269, and the opposite ends of the first elastic member 268 respectively press against the first moving part 2665 and the second moving part 2675.

[0068] like Figure 8-Figure 11As shown, the rotating shaft device 22 also includes a first supporting member 240 and / or a second supporting member 246 slidably mounted on a pair of connecting shafts 260, the first rotating portion 2611 and / or the second rotating portion 2631 cooperates with the first supporting member 240 through a first cam assembly, and the first rotating portion 2611 and / or the second rotating portion 2631 cooperates with the second supporting member 246 through a second cam assembly. Specifically, the first abutting member 240 includes two first sleeves 241 respectively slidably sleeved on a pair of connecting shafts 260, and the two first sleeves 241 are respectively provided with first abutting cams 242 at one end facing the first rotating portion 2611 and the second rotating portion 2631, and the first sleeves 241 and the first abutting cams 242 thereon are coaxial; the first rotating portion 2611 and one of the first sleeves 241 are connected by the first cam 2617 and the first abutting cam 242, and the second rotating portion 2631 and the other first sleeve 241 are connected by the second cam 2637 and the first abutting cam 242. When the first connecting rod 261 and / or the second connecting rod 263 rotate around the corresponding connecting shaft 260, there is friction resistance between the first cam 2617 and the second cam 2637 and the two first abutting cams 242, respectively, and the friction resistance can hinder the first connecting rod 261 and the second connecting rod 263 from rotating around the corresponding connecting shaft 260. Specifically, one of the connecting shafts 260 is passed through the first cam 2617 of the first connecting rod member 261 and one of the first abutting cams 242 of the first abutting member 240, and the other connecting shaft 260 is passed through the second cam 2637 of the second connecting rod member 263 and the other first abutting cam 242 of the first abutting member 240. The two first abutting cams 242 are rotatably abutted against the first cam 2617 and the second cam 2637 respectively.

[0069] Furthermore, the first abutting member 240 further includes a first connecting portion 243 connected between the two first sleeves 241, and the axes of the two first sleeves 241 are spaced and parallel. The axis of each first sleeve 241 is colinear with the axis of the corresponding first shaft hole 2410, and the first abutting cam 242 is provided at the end of the first sleeve 241 facing the first elastic member 268. Each first abutting cam 242 includes a concave-convex surface provided at one end of the first sleeve 241, and the concave-convex surface includes a third protruding portion 2421 and a third concave portion 2423 arranged in sequence along the circumference of the first sleeve 241. The number of the third protrusions 2421 and the number of the third recesses 2423 can be set as needed, such as the first abutting cam 242 can include one third protrusion 2421 and one third recess 2423, two third protrusions 2421 and two third recesses 2423, three third protrusions 2421 and three third recesses 2423, or four third protrusions 2421 and four third recesses 2423. In this embodiment, the first abutting cam 242 includes three third protrusions 2421 and three third recesses 2423 arranged at intervals along the circumference of the first sleeve 241. The axis of one of the first abutting cams 242 is coaxial with the corresponding first sleeve 241, and the axis of the other first abutting cam 242 is coaxial with the corresponding first sleeve 241. Preferably, the opposite end surfaces of the first abutting member 240 form arc surfaces to facilitate the folding or unfolding of the rotating shaft device 22. In some embodiments, one of the first abutting cams 242 on the two first sleeves 241 can be omitted, that is, the first cam 2617 of the first link member 261 or the third cam 2666 of the third link member 266 can be omitted.

[0070] The second abutting member 246 comprises two second sleeves 2461 respectively slidably sleeved on a pair of connecting shafts 260, and the two second sleeves 2461 are respectively provided with second abutting cams 2460 at one end facing the first rotating portion 2611, and the second sleeves 2461 and the second abutting cams 2460 thereon are coaxial; the first rotating portion 2611 and one of the second sleeves 2461 are connected by the cooperation of the first cam 2617 and the second abutting cam 2460, and the second rotating portion 2631 and the other second sleeve 2461 are connected by the cooperation of the second cam 2637 and the second abutting cam 2460. When the first connecting rod 261 and / or the second connecting rod 263 rotates around the corresponding connecting shaft 260, there is friction resistance between the second cam 2637 and the first cam 2617 and the two second abutting cams 2460, and the friction resistance can hinder the first connecting rod 261 and the second connecting rod 263 from rotating around the corresponding connecting shaft 260. Specifically, one of the connecting shafts 260 is provided through the first cam 2617 of the first link member 261 and one of the second abutting cams 2460 of the second abutting member 246, and the other connecting shaft 260 is provided through the second cam 2637 of the second link member 263 and another second abutting cam 2460 of the second abutting member 246, and the two second abutting cams 2460 are rotatably abutted against the first cam 2617 and the second cam 2637, respectively. Further, the second abutting member 246 also includes a second connecting portion 2463 connected between two second sleeves 2461, and the axes of the two second sleeves 2461 are spaced and parallel. The axis of each second sleeve 2461 is colinear with the axis of the corresponding second shaft hole 2465, and the second abutting cam 2460 is provided at the end of the second sleeve 2461 facing the linkage assembly 265. Each second abutting cam 2460 includes a concave-convex surface, which includes fourth protrusions 2462 and fourth recesses 2464 that are sequentially arranged at intervals along the circumference of the second sleeve 2461. The number of the fourth protrusions 2462 and the number of the fourth recesses 2464 can be set as needed, such as the second abutting cam 2460 can include one fourth protrusion 2462 and one fourth recess 2464, two fourth protrusions 2462 and two fourth recesses 2464, three fourth protrusions 2462 and three fourth recesses 2464, or four fourth protrusions 2462 and four fourth recesses 2464. In this embodiment, the second abutting cam 2460 includes three fourth protrusions 2462 and three fourth recesses 2464 that are sequentially arranged at intervals along the circumference of the second sleeve 2461. The axis of one of the second abutting cams 2460 is coaxial with the corresponding second sleeve 2461 , and the axis of the other second abutting cam 2460 is coaxial with the corresponding second sleeve 2461 .In some embodiments, one of the second abutting cams 2460 on the two second sleeves 2461 can be omitted, that is, the first cam 2617 of the first link member 261 or the second cam 2637 of the second link member 263 can be omitted.

[0071] Optionally, the rotating shaft device 22 further includes a second elastic member 244 and / or a third elastic member 249, the second elastic member 244 is used to push the first holding member 240 to abut the first rotating portion 2611 and the second rotating portion 2631, and the third elastic member 248 is used to push the second holding member 246 to abut the first rotating portion 2611 and the second rotating portion 2631. Specifically, the two second elastic members 244 are respectively sleeved on the two connecting shafts 260, and the two second elastic members 244 push the two first sleeves 241 respectively, so that the two first abutting cams 242 respectively abut the first cam 2617 and the second cam 2637 at the same end; the two third elastic members 248 are respectively sleeved on the two connecting shafts 260, and the two third elastic members 248 push the two second sleeves 2461 respectively, so that the two second abutting cams 242 respectively abut the first cam 2617 and the second cam 2637 at the other end. The second elastic member 244 and the third elastic member 249 can be but are not limited to springs, elastic rubber or elastic plastic, etc. In this embodiment, the second elastic member 244 and the third elastic member 249 are both springs.

[0072] Optionally, the first folding aid mechanism 24 further comprises a gasket 245 sleeved on one end of a pair of connecting shafts 260 and a clamping piece 249 connected to the other end of the pair of connecting shafts 260, the gasket 245 comprises two annular gaskets 2451 and a first connecting strip 2453 connected between the two annular gaskets 2451, and the two annular gaskets 2451 are respectively sleeved on the pair of connecting shafts. The clamping piece 249 comprises a C-shaped buckle 2491 respectively clamped on the pair of connecting shafts 260 and a second connecting strip 2493 connected between the two C-shaped buckles 2491.

[0073] like Figure 8-Figure 11As shown, the first folding assisting mechanism 24 further includes a positioning member 27 slidably connected to the base 221, the first rotating member 251 and the positioning member 27 are rotatably connected through the cooperation of the first arc track and the third arc groove, the first arc track is provided at one of the first rotating member 251 and the positioning member 27, and the third arc groove is provided at the other of the first rotating member 251 and the positioning member 27; the second rotating member 256 and the positioning member 27 are rotatably connected through the cooperation of the second arc track and the third arc groove, the second arc track is provided at one of the second rotating member 256 and the positioning member 27, and the third arc groove is provided at the other of the second rotating member 256 and the positioning member 27; the axes of the two third arc grooves are respectively colinear with the axes of the first arc groove 2252 and the second arc groove 2254. The positioning member 27 is connected to the mounting portion 225 of the base 221, and the positioning member 27 and the base 221 jointly position the first rotating member 251 and the second rotating member 256. The positioning member 27 includes positioning portions 272 located at opposite ends thereof, and a connecting portion 275 connected between the two positioning portions 272. A third circular arc groove 2721 is respectively provided on the same side of the two positioning portions 272. The axes of the two third circular arc grooves 2721 are parallel. One of the first circular arc rails 2511 of the first rotating member 251 and one of the second circular arc rails 2561 of the second rotating member 256 are respectively rotatably accommodated in the two third circular arc grooves 2721. In other embodiments, the two positioning portions 272 are respectively provided with circular arc rails on the sides facing the first rotating member 251, and the first rotating portion 2512 of the first rotating member 251 and the second rotating portion 2562 of the second rotating member 256 are respectively provided with circular arc grooves on the sides facing the positioning member 27. The two circular arc rails are rotatably accommodated in the two circular arc grooves. The positioning member 27 and the base 221 are slidably connected through the cooperation of a guide slider and a guide slot, the guide slider is provided at one of the positioning member 27 and the base 221, and the guide slot is provided at the other of the positioning member 27 and the base 221. In this embodiment, a guide slot 276 is provided on the back of the positioning member 27, and the guide slider 2258 is slidably accommodated in the guide slot 276, so that the positioning member 27 can move along the axial direction parallel to the connecting shaft 260. Optionally, a guide groove is provided on the back of the connecting portion 275 along the axial direction of the third arc groove 2721, and the opposite ends of the guide groove respectively penetrate the opposite sides of the positioning member 27, and the guide slider 2258 is slidably inserted in the guide groove; the opposite sides of the guide slide groove 276 are provided with guide grooves respectively, and the guide grooves extend along the axial direction of the connecting shaft 260, and the opposite ends of the guide groove respectively penetrate the opposite sides of the positioning member 27, and the two guide sliders 2258 of the third mounting portion 226 are slidably accommodated in the two guide slide grooves 276 of the positioning member 27. The opposite ends of the sides of the two positioning portions 272 away from the third arc groove 2721 are respectively provided with connecting columns 2724.

[0074] like Figure 4 and Figure 5As shown, the front of the back shell 29 is provided with a positioning portion 291 for positioning on the base 221, and the positioning portion 291 and the base 221 can be fixedly connected by means of, but not limited to, snap connection, screw connection or adhesive connection; in this embodiment, the positioning portion 291 is provided with a positioning column 293, and the back of the base 221 is provided with a positioning hole, and the positioning column 293 is snapped into the positioning hole so that the base 221 is fixedly connected to the positioning portion 291. In other embodiments, the positioning portion 291 can also have a positioning hole, and the back of the base 221 is provided with a positioning column, and the positioning column is connected with the positioning hole in cooperation so that the base 221 is fixedly connected to the positioning portion. In this embodiment, three positioning portions 291 are provided on the front of the back shell 29, and the three positioning portions 291 are arranged at intervals along the length direction of the back shell 29. In other embodiments, at least one positioning portion 291 is provided on the front of the back shell 29, and the number of the positioning portions 291 on the back shell 29 is consistent with the number of the bases 221 on the first folding aid mechanism 24.

[0075] Please also read Figure 6-Figure 11 and Figure 14-Figure 19When assembling the first folding assisting mechanism 24, the first elastic member 268 is sleeved on the guide slide shaft 269, and the first linkage member 266 and the second linkage member 267 are sleeved on the opposite ends of the guide slide shaft 269, so that the first elastic member 268 is clamped between the first linkage member 266 and the second linkage member 267; the first seat body 222 and the second seat body 226 are arranged at intervals along the length direction of the first support bar 224, so that the first stop plate 223 and the second stop plate 227 are spaced and opposite to each other; The guide shaft 269 is placed between the first anti-slip plate 223 and the second anti-slip plate 223, so that the opposite ends of the guide shaft 269 are respectively inserted into the first connecting hole 2232 and the second connecting hole 2272; the first connecting rod 261 and the second connecting rod 263 are respectively placed on the opposite sides of the base 221, so that the first anti-slip plate 2234 and the second anti-slip plate 2274 on one side of the base 221 are respectively inserted into the two first positioning grooves 2616 of the first connecting rod 261, and the base 221 on the other side The first anti-slip sheet 2234 and the second anti-slip sheet 2274 are respectively inserted into the two second positioning grooves 2636 of the second link member 263; at this time, the first sliding portion 2661 and the second sliding portion 2663 of the first linkage member 266 can be slidably accommodated in the first spiral groove 2610 of the first link member 261 and the second spiral groove 2630 at one end of the second link member 263, and the third sliding portion 2671 and the fourth sliding portion 2673 of the second linkage member 267 can be slidably accommodated in the first spiral groove 2610 of the first link member 261 and the second spiral groove 2630 at one end of the second link member 263, respectively. A third spiral groove 2613 of a connecting rod member 261 and a fourth spiral groove 2633 of a second connecting rod member 263; the pitch of the first spiral groove 2610 is equal to the pitch of the second spiral groove 2630, and the first spiral groove 2610 and the second spiral groove 2630 are symmetrical about the axis of the guide shaft 269; and / or the pitch of the third spiral groove 2613 is equal to the pitch of the fourth spiral groove 2633, and the third spiral groove 2613 and the fourth spiral groove 2633 are symmetrical about the axis of the guide shaft 269.The first abutting member 240 and the second abutting member 246 are respectively placed at opposite ends of the linkage assembly 265, so that the two first abutting cams 242 of the first abutting member 240 abut against the first cam 2617 and the second cam 2637 at the same end, and the two second abutting cams 2460 of the second abutting member 246 abut against the first cam 2617 and the second cam 2637 at the same end; one end of the two connecting shafts 260 with the clamping grooves 2605 is respectively passed through the two through holes 2292 of the second mounting portion 229, the two annular washers 2451 of the gasket 245, the two second elastic members 244, the two first shaft holes 2410 of the first abutting member 240, and the first rotating member 2637; The first rotating hole 2614 of the movable part 2611 and the second rotating hole 2634 of the second rotating part 2631, the second axial holes 2271 on the opposite sides of the base 221 and the first axial hole 2231 and the two second axial holes 2465 of the second supporting member 246; until the connecting grooves 2605 of the two connecting shafts 260 respectively expose the sides of the second supporting member 246 away from the second supporting cam 2460; the two C-shaped buckles 2491 of the clamping sheet 249 are respectively clamped in the clamping grooves 2605 of the two connecting shafts 260, so that the cover bodies 2603 of the two connecting shafts 260 respectively pass through the two through holes 2292 of the base 221 and press against the two annular pads 2451 of the gasket 245. At this time, one of the connecting shafts 260 is inserted into the first shaft hole 2231 and the second shaft hole 2271 on one side of the base 221, and the other connecting shaft 260 is inserted into the first shaft hole 2231 and the second shaft hole 2271 on the other side of the base 221. The opposite ends of the guide slide shaft 269 are inserted into the first connecting hole 2232 and the second connecting hole 2272; the first elastic member 268 is elastically clamped between the first linkage member 266 and the second linkage member 267, and the opposite ends of the first elastic member 268 push the first linkage member 266 and the second linkage member 267 respectively; the two second elastic members 244 are elastically clamped on the pad Between the sheet 245 and the first supporting member 240, the two second elastic members 244 elastically push the first supporting member 240 respectively so that the two first supporting cams 242 respectively push against the first cam 2617 and the second cam 2637, and the two second supporting cams 2460 of the second supporting member 246 respectively push against the first cam 2617 and the second cam 2637, and the first connecting rod member 261 and the second connecting rod member 263 can only rotate synchronously around the corresponding connecting shaft 260 and cannot move along the axial direction of the connecting shaft 260, and the first linkage member 266 and the second linkage member 267 can synchronously slide along the axial direction of the guide sliding shaft 269.

[0076] Place the positioning member 27 on the mounting portion 225 of the first seat body 222 so that the third arc groove 2721 faces the first protrusion 2251 and the second protrusion 2253, and the two guide slide blocks 2258 of the first seat body 222 can be slidably accommodated in the two guide slide grooves 276 respectively; place the two third elastic members 248 between the positioning member 27 and the clamping piece 249, so that the two connecting columns 2724 are respectively clamped in the inner cavity of the same end of the two third elastic members 248, and the ends of the two connecting shafts 260 are respectively clamped in the inner cavity of the other end of the two third elastic members 248. The first rotating part 2512 is placed in the first rotation-assisting groove 2256 of the base 221, so that the first arc rails 2511 at the opposite ends of the first rotating part 2512 can be rotatably accommodated in the first arc groove 2252 and one of the third arc grooves 2721 of the positioning member 27; the second rotating part 2562 is placed in the second rotation-assisting groove 2257 of the base 221, so that the second arc rails 2561 at the opposite ends of the second rotating part 2562 can be rotatably accommodated in the second arc groove 2254 and another third arc groove 2721 of the positioning member 27. The first link member 261 is slidably accommodated in the first guide groove 2526 of the first connecting member 252, so that the two first slide rails 2615a are slidably inserted in the two first slide grooves 2520 of the first connecting member 252; the second link member 263 is slidably accommodated in the second guide groove 2576 of the second connecting member 257, so that the second slide rails 2635a are slidably inserted in the two second slide grooves 2570 of the second connecting member 257. At this time, the opposite ends of the third elastic member 248 elastically push the positioning member 27 and the clamping piece 249 respectively, so that the positioning member 27 presses against the first rotating member 251 and the second rotating member 256, and the first rotating member 251 and the second rotating member 256 press against the first protrusion 2251 and the second protrusion 2253 of the base 221 respectively.When the first rotating member 251 and the second rotating member 256 rotate relative to the base 221, the first sliding portion 2661 and the second sliding portion 2663 of the first linkage member 266 slide synchronously along the first spiral groove 2610 and the second spiral groove 2630, respectively. At the same time, the third sliding portion 2671 and the fourth sliding portion 2673 of the second linkage member 267 slide synchronously along the third spiral groove 2613 and the fourth spiral groove 2633, respectively, so that the first linkage member 266 and the second linkage member 267 synchronously move closer to or away from each other along the axial direction of the guide shaft 269, and the opposite ends of the first elastic member 268 respectively press against the first linkage member 266 and the second linkage member 267, so that the first sliding portion 2661 and the inner surface of the first spiral groove 2610 and the second sliding portion 2673 are respectively pressed against each other. There is friction resistance between 663 and the inner surface of the second spiral groove 2630, between the third sliding part 2671 and the inner surface of the third spiral groove 2613, and between the fourth sliding part 2673 and the fourth spiral groove 2633. There is friction resistance between the first rotating member 251 and the second rotating member 256 and the base 221 and the positioning member 27 respectively. There is friction torque between the two first abutting cams 242 of the first abutting member 240 and the first cam 2617 and the second cam 2637 respectively. There is friction torque between the two second abutting cams 2460 of the second abutting member 246 and the first cam 2617 and the second cam 2637 respectively. These friction resistances and friction torques are used to limit the rotation of the first rotating member 251 and the second rotating member 256 relative to the base 221.

[0077] Please also read Figure 20-23The structure of the second folding-assisting mechanism 24a is similar to that of the first folding-assisting mechanism 24, except that the second folding-assisting mechanism 24a omits the third elastic member 248 and the positioning member 27 on the basis of the first folding-assisting mechanism 24, and the structure of the mounting portion 225a of the second folding-assisting mechanism 24a is slightly different from that of the mounting portion 225 of the first folding-assisting mechanism 24. Specifically, the first seat 222a of the second folding-assisting mechanism 24a includes a first support bar 224a and a mounting portion 225a, the length of the first support bar 224a is less than that of the first support bar 224, the first anti-slip plate 223 and the mounting portion 225a are disposed at opposite ends of the first support bar 224a, and the overall length of the first seat 222a is reduced compared to the first seat 222. The mounting portion 225a includes a pair of first protrusions 2251 spaced apart from each other and a pair of second protrusions 2253 spaced apart from each other, the pair of first protrusions 2251 being located on one side of the first support bar 224 and arranged along the length direction of the first support bar 224; the pair of second protrusions 2253 being located on the other side opposite to the first support bar 224 and arranged along the length direction of the first support bar 224; the side surfaces of the pair of first protrusions 2251 facing each other are respectively provided with first arc grooves 2252, the end of each first arc groove 2252 passes through the front surface of the corresponding first protrusion 2251, and the two first arc grooves 2252 are coaxial; the side surfaces of the pair of second protrusions 2253 facing each other are respectively provided with second arc grooves 2254, the end of each second arc groove 2254 passes through the front surface of the corresponding second protrusion 2253, the two second arc grooves 2254 are coaxial, and the axis of the first arc groove 2252 is spaced parallel to the axis of the second arc groove 2254. The first rotation-assisting groove 2256 and the second rotation-assisting groove 2257 are respectively provided on opposite sides of the front surface of the mounting portion 225a. Optionally, the inner surfaces of the first rotation-assisting groove 2256 and the second rotation-assisting groove 2257 are provided with arc surfaces. The first rotation-assisting groove 2256 is located between a pair of first protrusions 2251, and the axis of the first rotation-assisting groove 2256 is collinear with the axis of the first arc groove 2252; the second rotation-assisting groove 2257 is located between a pair of second protrusions 2253, and the axis of the second rotation-assisting groove 2257 is collinear with the axis of the second arc groove 2254. Adjustment rods 2210 are respectively provided on opposite sides of the end surface of the mounting portion 225a away from the first anti-slip plate 223, and the axes of the two adjustment rods 2210 are parallel to the axis of the first arc groove 2252.

[0078] The assembly process of the second folding-assisting mechanism 24a is similar to that of the first folding-assisting mechanism 24, except that the assembly process of the second folding-assisting mechanism 24a omits the assembly of the second elastic member 244 and the positioning member 27 on the basis of the first folding-assisting mechanism 24, which will not be repeated here.

[0079] Please also read Figure 4-Figure 7 , Figure 20-23When assembling the support mechanism 23 onto the base 221, the two side support members 231 are respectively placed on the opposite sides of the two middle support members 234, so that each side support member 231 is rotatably connected to the corresponding middle support member 234; the two first folding-assisting mechanisms 24 and the second folding-assisting mechanism 24a are placed on the back of the support mechanism 23, and the three are arranged along the length direction of the side support members 231, so that the adjustment rods 2210 of the base 221 are respectively inserted into the adjustment grooves 2340 corresponding to the two middle support members 234; the two side support members 231 are respectively placed on the front of the first rotating mechanism 250 and the front of the second rotating mechanism 255, so that the first positioning rod 2527 of the first connecting member 252 The first link 261 is rotated and slidably inserted into the positioning groove 2317 of one of the side support members 231, the second positioning rod 2577 of the second connecting member 257 is rotated and slidably inserted into the positioning groove 2317 of the other side support member 231, and the first rotating rails 2310 of the two side support members 231 are respectively rotatably accommodated in the first rotating groove 2522 of the first connecting member 252 and the second rotating groove 2572 of the second connecting member 257; the first limiting rod 2615b of the first connecting member 261 is rollably accommodated in the limiting groove 2315 of one of the side support members 231, and the second limiting rod 2635b of the second connecting member 263 is rollably accommodated in the limiting groove 2315 of the other side support member 231. The plurality of bases 221 are respectively fixedly connected to the back shell 29, specifically, the positioning column 293 is inserted into the connecting hole on the back of the base 221, and the base 221 is fixedly connected to the back shell 29 by gluing or welding. The second folding-assisting mechanism 24a omits the second elastic member 244 and the positioning member 27 on the basis of the first folding-assisting mechanism 24. The second folding-assisting mechanism 24a is shorter in the axial direction parallel to the connecting shaft 260, so that the interval between the first folding-assisting mechanisms 24 adjacent to the second folding-assisting mechanism 24a is larger, which can meet the requirements of the installation of the flexible circuit board.

[0080] like Figure 1-Figure 3 As shown, the installed hinge device 22 is placed between the two frames 21, the first connecting member 252 and the second connecting member 257 on the opposite sides of the back shell 29 are respectively placed in the mounting grooves 216 of the two frames 21, and the first connecting member 252 is connected to one of the frames 21, and the second connecting member 257 is connected to the other frame 21. At this time, the front faces 211 of the two frames 21, the front faces of the two middle supporting members 234, and the front faces of the two side supporting members 231 are coplanar. The bendable area 31 of the flexible screen 30 is connected to the front faces of the two side supporting members 231 and the front faces of the two middle supporting members 234 through the colloid 301, and the two non-bending areas 33 are respectively attached to the front faces 211 of the two frames 21.

[0081] Please also read Figure 1-Figure 3 and Figure 24-Figure 27When the electronic device 100 is folded from the flat state, one of the frames 21 drives the first rotating mechanism 250 to rotate relative to the base 221 toward the second rotating mechanism 255, so that the two first arc tracks 2511 of the first rotating member 251 of the first folding-assisting mechanism 24 rotate in the first arc groove 2252 of the base 221 and one of the third arc grooves 2721 of the positioning member 27, respectively. At the same time, the two first arc tracks 2511 of the first rotating member 251 of the second folding-assisting mechanism 24a rotate in the two first arc grooves 2252 of the base 221a, respectively, and the first connecting member 252 drives the first connecting rod 261 to rotate relative to the base 221 toward the second connecting rod 261 along the axis of the corresponding connecting shaft 260. 63 rotates, the first sliding part 2661 and the third sliding part 2671 slide synchronously along the first spiral groove 2610 and the third spiral groove 2613 respectively, so that the first linkage member 266 and the second linkage member 267 slide synchronously along the guide shaft 269 respectively and move closer to each other, driving the second sliding part 2663 and the fourth sliding part 2673 to slide synchronously along the second spiral groove 2630 and the fourth spiral groove 2633 respectively, so as to realize that the first connecting rod member 261 and the second connecting rod member 263 rotate synchronously around a pair of connecting shafts 260 and move closer to each other; the first connecting rod member 261 and the second connecting rod member 263 synchronously drive the first rotating mechanism 250 and the second rotating mechanism 255 to rotate respectively relative to the base 221 and move closer to each other.When the first rotating mechanism 250 and the second rotating mechanism 255 rotate toward each other, the first sliding portion 2661 slides from the first end of the first spiral groove 2610 to the second end, the second sliding portion 2663 slides from the first end of the second spiral groove 2630 to the second end, the third sliding portion 2671 slides from the first end of the third spiral groove 2613 to the second end, and the fourth sliding portion 2673 slides from the first end of the fourth spiral groove 2633 to the second end; the first connecting member 252 is connected to one of the side support members 231. Through the rotational cooperation between the first rotating rail 2310 and the first rotating groove 2522, the second connecting member 257 and the other side supporting member 231 through the rotational cooperation between the first rotating rail 2310 and the second rotating groove 2572, the first positioning rod 2527 rolls from the first end 2317a of the corresponding positioning groove 2317 to the second end 2317b, and at the same time, the second positioning rod 2577 rolls from the first end 2317a of the corresponding positioning groove 2317 to the second end 2317b; the first limiting rod 2615b rolls from the first end 2317a of the corresponding limiting groove 2315 to the second end 2317b; The limiting section 2315a rolls to the second limiting section 2315b, and at the same time, the second limiting rod 2635b rolls from the first limiting section 2315a of the corresponding limiting groove 2315 to the second limiting section 2315b; the adjusting rod 2210 rolls from the first positioning section 2341 of the corresponding adjusting groove 2340 to the second positioning section 2343 via the middle section 2345, so that the two side support members 231 are separated from each other, and at the same time, the two middle support members 234 are separated from each other, until the adjusting rod 2210 is limited to the second positioning section 2343, the first positioning rod 2345, and the second limiting rod 2635b. 2527 and the second positioning rod 2577 are respectively positioned at the two second limiting sections 2315b; the two first abutting cams 242 of the first abutting member 240 respectively rotate to abut the first cam 2617 and the second cam 2637, and the two second abutting cams 2460 of the second abutting member 246 respectively rotate to abut the first cam 2617 and the second cam 2637, the first connecting rod member 261 and the second connecting rod member 263 stop rotating, and the front faces of the two side support members 231 and the two side support members 234 form a water drop-shaped cross-section.

[0082] During the bending process of the support mechanism 23, the first link member 261 and the second link member 263 rotate around the two connecting shafts 260 and approach each other, and the two first cams 2617 of the first link member 261 rotate to abut against one of the first abutting cams 242 of the first abutting member 240 and one of the second abutting cams 2460 of the second abutting member 246, and the two second cams 2637 of the second link member 263 rotate to abut against the other first abutting cam 242 of the first abutting member 240 and the other second abutting cam 246 of the second abutting member 246. Cam 2460, at the same time, the first sliding portion 2661 and the inner surface of the first spiral groove 2610 are slidably pressed against each other, the second sliding portion 2663 and the inner surface of the second spiral groove 2630 are slidably pressed against each other, the third sliding portion 2671 and the inner surface of the third spiral groove 2613 are slidably pressed against each other, and the fourth sliding portion 2673 and the inner surface of the fourth spiral groove 2633 are slidably pressed against each other, so that the first linkage member 266 and the second linkage member 267 respectively slide synchronously toward each other along the axial direction of the guide shaft 269 to realize the synchronous folding of the support mechanism 23.Therefore, compared with the rotating shaft device in the prior art that generally adopts gear transmission to achieve the effect of synchronous and unidirectional rotation, the manufacturing and assembly of the rotating shaft device is complicated and the cost is high, and the tooth surface is worn during the movement, which affects the function. The linkage mechanism of the rotating shaft device 22 of the present application does not need to be realized by the meshing of gears, so that the structure of the linkage component 265 is simple, the manufacturing cost is low, and the overall volume of the rotating shaft device 22 is reduced, which is conducive to the miniaturization development of the rotating shaft device 22 and the lightweight and miniaturization development of the electronic device 100; secondly, under the trend of miniaturization of the rotating shaft device in the prior art, the gears are relatively reduced, which not only increases the difficulty of processing and manufacturing, but also the torque is not enough to achieve the opening and closing feel and hovering effect; the rotating shaft device 22 of the present application has friction resistance when the two first cams 2617 rotate relative to the first top cam 242 and the second top cam 2460 respectively, and the two second cams 2637 have friction resistance when they rotate relative to the first top cam 242 and the second top cam 2460 respectively, and the first sliding part 2661 and the first spiral The inner surface of the groove 2610 has friction resistance, the second sliding portion 2663 and the inner surface of the second spiral groove 2630 have friction resistance, the third sliding portion 2671 and the inner surface of the third spiral groove 2613 have friction resistance, the fourth sliding portion 2673 and the inner surface of the fourth spiral groove 2633 have friction resistance, and the friction resistance between the first rotating member 251 and the second rotating member 256 and the base 221 and the positioning member 27 respectively, these friction resistances can make the first rotating member 251 and the second rotating member 256 256 is positioned relative to the base 221, and the first connecting rod 261 and the second connecting rod 263 are positioned relative to the base 221, so that the first rotating member 251 is positioned at any angle between 0 degrees and 90 degrees relative to the base 221 and the second rotating member 256 is positioned at any angle between 0 degrees and 90 degrees relative to the base 221; the two side support members 231 are respectively positioned at any angle between 0 degrees and 120 degrees relative to the base 221, so that the electronic device 100 can achieve a larger angle of hovering.

[0083] In other folding methods of the electronic device 100, the other frame 21 can drive the second rotating mechanism 255 to rotate relative to the base 221 toward the first rotating mechanism 250, and the two frames 21 can also simultaneously rotate the first rotating mechanism 250 and the second rotating mechanism 255 relative to the base 221 in opposite directions. At this time, the relative motion relationship of each component is similar to that of the above embodiment, so it is not repeated.

[0084] When the electronic device 100 is unfolded from a completely folded state, the movement process of each component is opposite to that when the hinge device 22 is folded from a flat state, which will not be described in detail herein.

[0085] The hinge device 22 of the electronic device 100 of the present invention can realize the synchronous reverse rotation of the two side support members 231 and the two middle support members 234 through the linkage component 265 set between the first link member 261 and the second link member 263, and the operation is convenient; the linkage component 265 has a simple structure and low manufacturing cost, and the overall thickness of the linkage component 265 is small, which reduces the internal space occupied by the hinge device 22 of the folding shell 20, and can reduce the overall thickness of the hinge device 22, so as to leave more space for stacking batteries, motherboards, etc., and is beneficial to the layout of other components such as motherboards or batteries, and is beneficial to the miniaturization and thinning of the electronic device 100. Secondly, the hinge device 22 uses the friction resistance between the first abutting member 240 and the second abutting member 246 and the first connecting rod member 261 and the second connecting rod member 263 respectively, the friction resistance between the first rotating member 251 and the second rotating member 256 and the base 221 and the positioning member 27 respectively, and the friction resistance between the first link member 266 and the second link member 267 and the first connecting rod member 261 and the second connecting rod member 263 respectively, so that the two frames 21 can be freely adjusted in the unfolded state, the folded state and the intermediate state, that is, the electronic device 100 can be positioned in the unfolded state, the folded state and any intermediate state, so that the bendable area 31 of the flexible screen 30 is positioned at any bending angle, so as to ensure that the hinge device 22 maintains sufficient torque to achieve the opening and closing feel and the hovering effect.

[0086] The above is an implementation of the embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the embodiment of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A rotating shaft device, characterized in that: The rotating shaft device includes a pair of spaced-apart parallel connecting shafts, a first connecting rod connected to one of the connecting shafts, a second connecting rod connected to the other connecting shaft, and a linkage assembly, wherein the linkage assembly is arranged between the first connecting rod and the second connecting rod, and the linkage assembly includes a first linkage member, the first linkage member and the first connecting rod are connected by a first spiral groove and a first sliding portion, and the first linkage member and the second connecting rod are connected by a second spiral groove and a second sliding portion, and the rotation direction of the first spiral groove is opposite to that of the second spiral groove; when the first connecting rod or the second connecting rod rotates around the axis of the corresponding connecting shaft, the first sliding portion slides along the first spiral groove, and the second sliding portion slides along the second spiral groove, so that the first connecting rod and the second connecting rod rotate synchronously in opposite directions and fold or unfold with each other.

2. The rotating shaft device according to claim 1, characterized in that: The first connecting rod member includes a first rotating portion rotatably connected to one of the connecting shafts, the second connecting rod member includes a second rotating portion rotatably connected to the other connecting shaft, the first spiral groove is opened in the first rotating portion, the second spiral groove is opened in the second rotating portion, and the first sliding portion and the second sliding portion are arranged on the first linkage member.

3. The rotating shaft device according to claim 2, characterized in that: The linkage assembly also includes a second linkage member, the second linkage member and the first rotating part are connected by a third spiral groove and a third sliding part, the second linkage member and the second rotating part are connected by a fourth spiral groove and a fourth sliding part, the rotation direction of the third spiral groove is opposite to that of the fourth spiral groove, the rotation direction of the first spiral groove is opposite to that of the third spiral groove, and the rotation direction of the second spiral groove is opposite to that of the fourth spiral groove; when the first connecting rod member or the second connecting rod member rotates around the axis of the corresponding connecting shaft, the third sliding part slides along the third spiral groove, and the fourth sliding part slides along the fourth spiral groove, so that the first linkage member and the second linkage member are brought closer to or away from each other.

4. The rotating shaft device according to claim 3, characterized in that: The third spiral groove is arranged on the first rotating part, and the first spiral groove and the third spiral groove are arranged on the first rotating part at intervals along the axial direction of the connecting shaft; the fourth spiral groove is arranged on the second rotating part, and the second spiral groove and the fourth spiral groove are arranged on the second rotating part at intervals along the axial direction of the connecting shaft.

5. The rotating shaft device according to claim 3, characterized in that: The linkage assembly further includes a first elastic member, and the first elastic member is located between the first linkage member and the second linkage member.

6. The rotating shaft device according to claim 5, characterized in that: The linkage assembly also includes a guide sliding shaft, the axis of the guide sliding shaft is parallel to the axis of the connecting shaft, and the first linkage member and the second linkage member are slidably mounted on the guide sliding shaft along the axial direction of the guide sliding shaft; the first elastic member is mounted on the guide sliding shaft, and the opposite ends of the first elastic member respectively abut the first movable part and the second movable part.

7. The rotating shaft device according to claim 6, characterized in that: The rotating shaft device also includes a base, a first rotating mechanism rotatably connected to one side of the base, and a second rotating mechanism rotatably connected to the other side of the base. A pair of connecting shafts are arranged on opposite sides of the base, and the guide sliding shaft is connected to the base; the first connecting rod member also includes a first connecting rod portion connected to the first rotating portion, and the first connecting rod portion is slidably connected to the first rotating mechanism. The second connecting rod member also includes a second connecting rod portion connected to the second rotating portion, and the second connecting rod portion is slidably connected to the second rotating mechanism.

8. The rotating shaft device according to claim 7, characterized in that: When the rotating shaft device is in a flattened state, the distance between the end of the first spiral groove close to the first connecting rod portion and the end of the third spiral groove close to the first connecting rod portion is smaller than the distance between the end of the first spiral groove away from the first connecting rod portion and the end of the third spiral groove away from the first connecting rod portion; The distance between the end of the second spiral groove close to the second connecting rod part and the end of the fourth spiral groove close to the second connecting rod part is smaller than the distance between the end of the second spiral groove away from the second connecting rod part and the end of the fourth spiral groove away from the second connecting rod part.

9. The rotating shaft device according to claim 7, characterized in that: The base includes a first seat body and a second seat body, the first seat body and the second seat body are arranged at intervals along the axial direction of the connecting shaft, the first seat body includes a first stop plate, the second seat body includes a second stop plate, the first rotating part is provided with a first positioning groove along the radial direction of the connecting shaft, and the second rotating part is provided with a second positioning groove along the radial direction of the connecting shaft, the relative ends of the first stop plate and the second stop plate are respectively accommodated in the first positioning groove and the second positioning groove, and the relative ends of the guide sliding shaft are connected to the first stop plate and the second stop plate.

10. The rotating shaft device according to claim 9, characterized in that: The first spiral groove and the third spiral groove are located between the two first positioning grooves of the first rotating part, and the second spiral groove and the fourth spiral groove are located between the two second positioning grooves of the second rotating part.

11. The rotating shaft device according to claim 7, characterized in that: The rotating shaft device also includes a first abutment and / or a second abutment slidably mounted on the pair of connecting shafts, the first rotating part and / or the second rotating part cooperate with the first abutment via a first cam assembly, and the first rotating part and / or the second rotating part cooperate with the second abutment via a second cam assembly.

12. The rotating shaft device according to claim 11, characterized in that: The rotating shaft device also includes a second elastic member and / or a third elastic member, the second elastic member is used to push the first holding member against the first rotating part and the second rotating part, and the third elastic member is used to push the second holding member against the first rotating part and the second rotating part.

13. The rotating shaft device according to claim 6, characterized in that: The pitch of the first spiral groove is equal to the pitch of the second spiral groove, and the first spiral groove and the second spiral groove are symmetrical about the axis of the guide shaft; and / or the pitch of the third spiral groove is equal to the pitch of the fourth spiral groove, and the third spiral groove and the fourth spiral groove are symmetrical about the axis of the guide shaft.

14. A foldable housing, characterized in that: The folding shell includes the hinge device according to any one of claims 1 to 13 and two frames, the hinge device is located between the two frames, and the opposite sides of the hinge device are respectively connected to the two frames.

15. An electronic device, characterized in that: The electronic device includes a flexible screen, two frames and a hinge device as described in any one of claims 1 to 13, wherein the hinge device is located between the two frames, the opposite sides of the hinge device are respectively connected to the two frames, and the flexible screen is connected to the front sides of the two frames and the front side of the hinge device.

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