Rotating shaft device, folding housing and electronic equipment

Abstract

The present invention provides a rotating shaft device, which includes a base, a rotating mechanism, a damping member and a push member, wherein the rotating mechanism includes a rotating member, the rotating member is rotatably connected to the base, the damping member is connected to the base, the damping member is in contact with the rotating member, and the push member is used to push the damping member against the rotating member; when the rotating member rotates relative to the base, there is friction resistance between the damping member and the rotating member. The present invention also provides a folding housing and an electronic device provided with a rotating shaft device.

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. The current inward folding flexible display screens generally include U-shaped inward folding and teardrop-shaped inward folding. The foldable flexible display screens in the related art are generally supported by a hinge device. In order to achieve the opening and closing feel and hovering effect of the hinge device, a spring is generally required to provide axial elastic force. However, as the size of the folding device becomes smaller and smaller, the volume of the spring becomes smaller and smaller, and the axial elastic force is weakened, reducing the damping force of the folding device during bending or unfolding, thereby affecting the hovering effect of the folding electronic product. 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 base, a rotating mechanism, a damping member and a thrust member. The rotating mechanism includes a rotating member, the rotating member is rotatably connected to the base, the damping member is connected to the base, the damping member is in contact with the rotating member, and the thrust member is used to push the damping member against the rotating member; when the rotating member rotates relative to the base, there is friction resistance between the damping member and the rotating member.

[0005] The present application also provides a folding shell, which includes a rotating shaft device and two frames, the rotating shaft device includes a base, a rotating mechanism, a damping member and a pushing member, the rotating mechanism includes a rotating member, the rotating member is rotatably connected to the base, the damping member is connected to the base, the damping member is in contact with the rotating member, and the pushing member is used to push the damping member against the rotating member; when the rotating member rotates relative to the base, there is friction resistance between the damping member and the rotating member; the rotating shaft device is located between the two frames, and the 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 folding shell, the folding shell includes a hinge device and two frames, the hinge device includes a base, a rotating mechanism, a damping member and a pushing member, the rotating mechanism includes a rotating member, the rotating member is rotatably connected to the base, the damping member is connected to the base, the damping member is in contact with the rotating member, and the pushing member is used to push the damping member against the rotating member; when the rotating member rotates relative to the base, there is friction resistance between the damping member and the rotating member; 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 damping member of the folding assisting mechanism of the hinge device of the present invention abuts against the rotating member. When the rotating member rotates relative to the base, the damping member and the rotating member have friction resistance. The friction resistance can position the rotating mechanism relative to the base, thereby allowing the supporting assembly to be bent and positioned, so as to achieve relative positioning of the two frames to a specific angle, thereby realizing a hovering effect of the electronic device. 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 one 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 further three-dimensional structural schematic diagram 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 schematic diagram of the three-dimensional structure 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 schematic diagram of the three-dimensional structure of the first folding aid mechanism from another perspective;

[0017] Fig. 9 yes Figure 7 A further exploded schematic diagram of the three-dimensional structure of the first folding aid mechanism;

[0018] Fig.10 yes Fig. 9 A schematic diagram of the three-dimensional structure of the first folding aid mechanism from another perspective;

[0019] Fig.11 yes Figure 4 An enlarged three-dimensional structure diagram of the second folding aid mechanism;

[0020] Fig.12 yes Fig.11 A schematic diagram of a three-dimensional structure decomposition of the second folding aid mechanism;

[0021] Fig.13 yes Fig.12 A further exploded schematic diagram of the three-dimensional structure of the second folding aid mechanism;

[0022] Fig.14 yes Fig.13 A schematic diagram of the three-dimensional structure of the second folding aid mechanism from another perspective;

[0023] Fig.15 yes Figure 1 A schematic diagram of a three-dimensional structure of an electronic device in a fully folded state;

[0024] Fig.16 yes Fig.15 A schematic diagram of the three-dimensional structure of the electronic device;

[0025] Fig.17 yes Fig.16 A schematic diagram of the three-dimensional structure of the rotating shaft device;

[0026] Fig.18 yes Fig.17 An enlarged view of the three-dimensional structure of the first folding-assisting mechanism. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] Please also read Figures 1 to 5The electronic device 100 in one embodiment of the present invention includes a folding housing 20 and a flexible screen 30 disposed on the folding housing 20. The folding housing 20 includes two frames 21 and a hinge device 22. The hinge device 22 is located 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 of the two frames 21 and the front of the hinge device 22. The hinge device 22 includes a base, a rotating mechanism, a damping member and a push member. The rotating mechanism includes a rotating member rotatably connected to the base. The damping member is connected to the base, the damping member is in contact with the rotating member, and the push member is used to push the damping member against the rotating member. When the rotating member rotates relative to the base, there is friction resistance between the damping member and the rotating member. Specifically, the rotating shaft device 22 includes a supporting assembly 23, a first folding-assisting mechanism 24 and a back shell 29. The first folding-assisting mechanism 24 is arranged between the back shell 29 and the supporting assembly 23. The first folding-assisting mechanism 24 includes a first base 221, a first rotating mechanism 250 and a second rotating mechanism 255 arranged on opposite sides of the first base 221, two damping members 260 and two first thrust members 244. The first rotating mechanism 250 includes a first rotating member 251 rotatably connected to the first base 221, the second rotating mechanism 255 includes a second rotating member 256 rotatably connected to the first base 221, the damping member 260 is connected to the first base 221, and a damping member 260 is connected to the first base 221. The first rotating member 251 contacts, and the other damping member 260 contacts the second rotating mechanism 255. The two first pushing members 244 push the two damping members 260 respectively, so that one damping member 260 presses against the first rotating member 251, and the other damping member 260 presses against the second rotating mechanism 255. When the first rotating member 251 and the second rotating member 256 rotate relative to the first base 221 respectively, there is friction resistance between one damping member 260 and the first rotating member 251, and there is friction resistance between the other damping member 260 and the second rotating member 256. These friction resistances can hinder the first rotating member 251 and the second rotating member 256 from rotating relative to the first base 221 respectively.

[0030] In other embodiments, the first folding assisting mechanism 24 only includes a damping member 260 and a first resisting member 244 , that is, a damping member 260 is connected to the first base 221 , and the first resisting member 244 resists the damping member 260 to resist the first rotating member 251 or the second rotating member 256 .

[0031] 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 flexible screen 30 may be, but is not limited to, a flexible display screen, a flexible touch screen, a flexible touch display screen, and other flexible components with corresponding functions, or a flexible component fixedly bonded with a flexible support plate, such as a flexible display screen and a flexible touch screen bonded with a flexible steel plate. The electronic device 100 is, for example, but not limited to, a mobile phone, a tablet computer, a display, a liquid crystal panel, an OLED panel, a television, a smart watch, a VR head-mounted display, a car display, and any other product and component with a display function. The "connection" in the description of the embodiment of the present invention includes two situations: direct connection and indirect connection. For example, the connection between A and B includes direct connection between A and B or connection through a third element C or more other elements. The connection also includes two situations: integrated connection and non-integrated connection. The integrated connection means that A and B are formed and connected as one, and the non-integrated connection means that A and B are formed and connected as one.

[0032] One of the damping members 260 of the first folding assisting mechanism 24 of the hinge device 22 of the present invention abuts against the first rotating member 251, and / or another damping member 260 abuts against the second rotating member 256; when the first rotating member 251 and the second rotating member 256 rotate relative to the first base 221, one of the damping members 260 and the first rotating member 251 have friction resistance, and the other damping member 260 and the second rotating member 256 have friction resistance, which can position the first rotating mechanism 250 and the second rotating mechanism 255 relative to the base 221, so that the support assembly 23 can be bent and positioned, so as to realize the relative positioning of the two frames 21 to a specific angle, and realize the hovering effect of the electronic device 100. The support assembly 23 of the hinge device 22 can realize multi-angle limitation in the process of bending or flattening, so that the flexible screen 30 attached to the support assembly 23 can realize multi-angle limitation in the process of bending or flattening with the support assembly 23, which is convenient to use and improves user experience. The specific angle refers to the angle between the front surfaces of the two frames 21 being in the range of 0 degrees to 180 degrees.

[0033] Please also read Figure 4-Figure 5The support assembly 23 includes a pair of side support members 231 and a pair of middle support members 234, wherein the pair of middle support members 234 are located between the pair of side support members 231, and each side support member 231 is rotationally connected to the adjacent middle support member 234, wherein a side of the side support member 231 away from the middle support member 234 is rotationally connected to the first rotating mechanism 250 through the cooperation of the first rotating rail 2310 and the first rotating groove 2522, and a side of the other side support member 231 away from the middle support member 234 is rotationally connected to the second rotating mechanism 255 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 rotation mechanism 250 and the corresponding side support member 231, the rotation axis between the second rotation mechanism 255 and the corresponding side support member 231, and the rotation axis between the first rotation mechanism 250 and the second rotation 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 and the base 221 are respectively connected by adjusting rods 2212 and adjusting slots 231. 40 is movably connected in cooperation, the adjustment slot 2340 includes a first positioning section 2341 and a second positioning section 2343 located at opposite ends thereof, the first positioning section 2341 is closer to the side support member 231 than the second positioning section 2343; when a pair of side support members 231 and a pair of middle support members 234 are in a flattened state, the two adjustment rods 2212 are respectively positioned at the two first positioning sections 2341; when a pair of side support members 231 and a pair of middle support members 234 are in a folded state, the two adjustment rods 2212 are respectively positioned at the two second positioning sections 2343.

[0034] The middle support member 234 includes a rectangular middle support plate, and a strip-shaped adjustment block 2344 is provided on the back of the middle support member 234. The length direction of the adjustment block 2344 is perpendicular to the length direction of the middle support plate, and opposite ends of the adjustment block 2344 are respectively located on opposite sides of the middle support member, and an adjustment slot 2340 is provided on the adjustment block 2344. Specifically, the adjustment slot 2340 is an arc-shaped slot, and the adjustment slot 2340 is provided on one side of the adjustment block 2344. The adjustment slot 2340 may or may not pass through the opposite side of the adjustment block 2344; the adjustment slot 2340 is bent and extends from the first positioning section 2341 to the second positioning section 2343. In this embodiment, three pairs of adjustment blocks 2344 are provided on the back of the middle support plate, and the space between each pair of adjustment blocks 2344 is used to accommodate a base 221 of the rotation-assisting mechanism. Therefore, one first folding-assisting mechanism 24 and two second folding-assisting mechanisms 24a in this embodiment are respectively accommodated between the three pairs of adjustment blocks 2344, and a pair of adjustment rods 2212 are respectively provided at the opposite ends of each base, and the pair of adjustment rods 2212 are respectively inserted into two adjustment slots 2340 corresponding to a pair of middle support members 234. In other embodiments, two pairs of adjustment blocks 2344 are provided on the back of the middle support plate, and the two pairs of adjustment blocks 2344 are respectively located at the opposite ends of the middle support plate, and the two bases 221 are respectively accommodated between the two pairs of adjustment blocks 2344, and the adjustment rods 2212 on the bases 221 are respectively inserted into the corresponding adjustment slots 2340. It can be understood that the number of pairs of adjustment blocks 2344 on the back of the middle support plate is consistent with the number of rotation-assisting mechanisms on the back of the support assembly 23.

[0035] The middle support member 234 is rotatably connected to the adjacent side support member 231 through the cooperation of a rotation shaft and a rotation hole, the rotation shaft is provided at one of the middle support member 234 and the side support member 231, the rotation hole is provided at the other of the middle support member 234 and the side support member 231, and the axis of the rotation shaft is colinear with the rotation axis between the middle support member 234 and the side support member 231. In this embodiment, the back of the middle support member 234 is provided with a rotation shaft, and the side support member 231 is provided with a rotation hole, and the rotation shaft is rotatably inserted into the rotation hole.

[0036] Optionally, the side support member 231 and the first connecting member 252 are rotatably connected through the cooperation of the first rotating rail and the first rotating groove, the first rotating rail is provided at one of the side support member 231 and the first connecting member 252, and the first rotating groove is provided at the other of the side support member 231 and the first connecting member 252. In this embodiment, the first rotating rail 2310 is provided at the back side of the side support member 231 away from the middle support member 234, the first rotating rail 2310 is a circular arc rail, and the axis of the first rotating rail 2310 is parallel to the rotation axis between the side support member 231 and the corresponding middle support member 234. In this embodiment, three pairs of first rotating rails 2310 are provided at the back side of the side support member 231 away from the middle support member 234, and the three pairs of first rotating rails 2310 are coaxial. Specifically, a pair of first rotating rails 2310 are provided at opposite ends of the side support member 231, and another pair of first rotating rails 2310 is provided at the middle of the side support member 231. A stop block 2314 is provided on the back of the side support member 231 between each pair of first rotating rails 2310. A side of the stop block 2314 is provided with an arc-shaped stop slot 2315. The stop slot 2315 includes a first stop segment 2315a and a second stop segment 2315b located at opposite ends thereof. The first stop segment 2315a is farther away from the middle support member 234 than the second stop segment 2315b. A positioning block 2316 is provided on the back of the side support member 231. A side of the positioning block 2316 is provided with an arc-shaped stop slot 2317. The stop slot 2317 includes a first end 2317a and a second end 2317b located at opposite ends thereof. The first end 2317a is farther away from the back of the side support member 231 than the second end 2317b.

[0037] like Figure 3 As shown, 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, and the receiving spaces are used to install electronic components such as circuit boards, batteries, speakers, receivers, cameras or buttons.

[0038] Please also read Figure 4-Figure 10, the shaft device 22 also includes a second folding-assisting mechanism 24a, and 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 component 23, and the first folding-assisting mechanism 24 and the second folding-assisting mechanism 24a are spaced apart from each other. In this embodiment, a first folding-assisting mechanism 24 and two second folding-assisting mechanisms 24a are provided on the back of the support component 23, wherein one second folding-assisting mechanism 24a and the first folding-assisting mechanism 24 are located at opposite ends of the support component 23, and the other second folding-assisting mechanism 24a is located in the middle of the support component 23, and there is a gap between the first folding-assisting mechanism 24 and the adjacent second folding-assisting mechanism 24a, and the gap is used for the insertion of components such as flexible circuit boards. The second folding assisting mechanism 24a includes a second base 221a, a first rotating mechanism 250 and a second rotating mechanism 255 disposed on opposite sides of the second base 221a, two damping members 260 and two first resisting members 244, the first rotating mechanism 250 includes a first rotating member 251 rotatably connected to the second base 221a, the second rotating mechanism 255 includes a second rotating member 256 rotatably connected to the second base 221a, and the damping member 260 is connected to the second base 221a, one of the damping members 260 is in contact with the first rotating member 251, and the other damping member 260 is in contact with the second rotating mechanism 255, the two first push members 244 push the two damping members 260 respectively, so that one damping member 260 pushes against the first rotating member 251, and the other damping member 260 pushes against the second rotating mechanism 255; when the first rotating member 251 and the second rotating member 256 rotate respectively relative to the second base 221a, there is a friction resistance between one damping member 260 and the first rotating member 251, and there is a friction resistance between the other damping member 260 and the second rotating member 256, these friction resistances can hinder the first rotating member 251 and the second rotating member 256 from rotating respectively relative to the first base 221.

[0039] In other embodiments, the second folding assisting mechanism 24 a only includes a damping member 260 and a first resisting member 244 , that is, a damping member 260 is connected to the second base 221 a , and the first resisting member 244 resists the damping member 260 to abut against the first rotating member 251 or the second rotating member 256 .

[0040] In some embodiments, only one first folding-assisting mechanism 24 and one second folding-assisting mechanism 24a are provided on the back of the support component 23, and the first folding-assisting mechanism 24 and the second folding-assisting mechanism 24a are respectively located at opposite ends of the support component 23, and there is a gap between the first folding-assisting mechanism 24 and the second folding-assisting mechanism 24a. In some embodiments, only one first folding-assisting mechanism 24 is provided on the back of the support component 23, such as one first folding-assisting mechanism 24 is provided in the middle of the back of the support component 23; another example is one first folding-assisting mechanism 24 is provided at opposite ends of the back of the support component 23; another example is three or more first folding-assisting mechanisms 24 are provided on the back of the support component 23, and these first folding-assisting mechanisms 24 are arranged along the length direction of the support component 23. In some embodiments, only the second folding-assisting mechanism 24a is provided on the back side of the support component 23, for example, a second folding-assisting mechanism 24a is provided in the middle part of the back side of the support component 23; another example is that a second folding-assisting mechanism 24a is provided at two opposite ends of the back side of the support component 23 respectively; another example is that more than three second folding-assisting mechanisms 24a are provided on the back side of the support component 23, and these second folding-assisting mechanisms 24a are arranged along the length direction of the support component 23.

[0041] Please also read Figure 7-10 The base 221 is provided with a guide hole 2210, the axis of the guide hole 2210 is parallel to the rotation axis between the rotating member and the base 221, and the damping member 260 is passed through the guide hole 2210, one end of the damping member 260 is connected to the push member, and the other end of the damping member 260 is pressed against the rotating member. Specifically, the base 221 is provided with guide holes 2210 on opposite sides, wherein the axis of one guide hole 2210 is parallel to the rotation axis between the first rotating member 251 and the base 221, and the axis of the other guide hole 2210 is parallel to the rotation axis between the second rotating member 256 and the base 221, and two damping members 260 are passed through the two guide holes 2210, wherein one end of one damping member 260 is connected to one of the first push members 244, and the other end is pressed against the first rotating member 251; one end of the other damping member 260 is connected to the other first push member 244, and the other end is pressed against the second rotating member 256. When the first rotating member 251 and the second rotating member 256 rotate relative to the base 221, the first rotating member 251 rotates relative to the corresponding damping member 260 and has friction resistance, and the second rotating member 256 rotates relative to the corresponding damping member 260 and has friction resistance. Optionally, the guide hole 2210 can be a regular hole or an irregular hole such as but not limited to a circular hole, a polygonal hole, an elliptical hole, etc.; in this embodiment, the guide hole 2210 is a circular hole.

[0042] Specifically, the base 221 is an elongated body, and the base 221 includes a support bar 222, and a first mounting portion 223 and a second mounting portion 224 are provided on the support bar 222. The first mounting portion 223 and the second mounting portion 224 are respectively located at opposite ends of the support bar 222. Specifically, the first mounting portion 223 includes a pair of first protrusions 2232 and a pair of second protrusions 2234 spaced apart from each other. The pair of first protrusions 2232 are located on one side of the support bar 222 and are arranged along the length direction of the support bar 222; the pair of second protrusions 2234 are located on the other side of the support bar 222 and are arranged along the length direction of the support bar 222; the base 221 is provided with an arc groove, and the axis of the arc groove is colinear with the rotation axis between the rotating member and the base 221; in this embodiment, the pair of first protrusions 2232 are arranged on the opposite side of the support bar 222 and are arranged along the length direction of the support bar 222; The sides facing each other of the first mounting portion 223 are provided with first arc grooves 2233, the end of each first arc groove 2233 passes through the front of the corresponding first protrusion 2232, and the two first arc grooves 2233 are coaxial; the sides facing each other of a pair of second protrusions 2234 are provided with second arc grooves 2235, the end of each second arc groove 2235 passes through the front of the corresponding second protrusion 2234, and the two second arc grooves 2235 are coaxial, and the axis of the first arc groove 2233 is spaced parallel to the axis of the second arc groove 2235. The first rotation-assisting groove 2236 and the second rotation-assisting groove 2237 are provided on opposite sides of the front of the first mounting portion 223, and optionally, the inner surfaces of the first rotation-assisting groove 2236 and the second rotation-assisting groove 2237 are provided with arc surfaces, the axis of the first rotation-assisting groove 2236 is colinear with the axis of the first arc groove 2233, and the axis of the second rotation-assisting groove 2237 is colinear with the axis of the second arc groove 2235. One of the guide holes 2210 is formed at the first protrusion 2232 close to the second mounting portion 224, and the other guide hole 2210 is formed at the second protrusion 2234 close to the second mounting portion 224. The axis of the guide hole 2210 is parallel to the axis of the first arc groove 2233. The guide hole 2210 is connected to the arc groove, and the damping member 260 can be inserted into the guide hole 2210, and one end of the damping member 260 away from the push member is exposed outside the arc groove. Specifically, one of the guide holes 2210 is connected to the first arc groove 2233, and when one of the damping members 260 is inserted into the guide hole 2210, one end of the damping member 260 away from the first push member 244 is exposed to the first arc groove 2233; the other guide hole 2210 is connected to the second arc groove 2235, and when the other damping member 260 is inserted into the guide hole 2210, one end of the damping member 260 away from the first push member 244 is exposed to the second arc groove 2235. Adjustment rods 2212 are respectively provided on opposite sides of the end surface of the first mounting portion 223 away from the second mounting portion 224, and the axes of the two adjustment rods 2212 are parallel to the axis of the first arc groove 2233.

[0043] The second mounting portion 224 of the base 221 includes a support plate 2241, a first stop plate 2243 and a second stop plate 2246. The support plate 2241 is located at one end of the front side of the base 221 away from the first mounting portion 223, the second stop plate 2246 is located at one end of the front side of the base 221 close to the first mounting portion 223, and the first stop plate 2243 is arranged on the front side of the base 221 between the support plate 2241 and the second stop plate 2246; the opposite ends of the support plate 2241 respectively protrude from the opposite sides of the support bar 222, and the two adjusting rods 2212 are respectively arranged at the opposite ends of the same side of the support plate 2241, and the opposite ends of the support plate 2241 are respectively provided with through holes 2242 along the axial direction of the adjusting rod 2212. The opposite ends of the first anti-slip plate 2243 extend from the opposite sides of the base 221 to form two first anti-slip plates 2245, each of which is provided with a first axial hole 2245a along the length direction of the support bar 222; the opposite ends of the second anti-slip plate 2246 extend from the opposite sides of the base 221 to form two second anti-slip plates 2247, each of which is provided with a second axial hole 2247a along the length direction of the support bar 222. The first axial hole 2245a and the second axial hole 2247a on the same side of the support bar 222 are coaxial. The support bar 222 is provided with a guide rail 2221 between the first anti-slip plate 2243 and the second anti-slip plate 2246, and the length direction of the guide rail 2221 is parallel to the axial direction of the first axial hole 2245a.

[0044] like Fig.10 and Fig.11As shown, the first rotating mechanism 250 further includes a first connecting member 252, one end of the first rotating member 251 is rotatably connected to the first connecting member 252, and one end of the first rotating member 251 away from the first connecting member 252 is rotatably connected to the base 221. 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 disposed at opposite ends of the first rotating member 251. The connecting member of the rotating mechanism is rotatably connected to one end of the rotating member away from the base 221, and one end of the rotating member of the rotating mechanism away from the connecting member is rotatably connected to one side of the base 221; specifically, the first rotating part 2512 and the base 221 are rotatably connected through the cooperation of the arc groove and the arc track, the arc groove is provided in one of the first rotating part 2512 and the base 221, and the arc track is provided in the other of the first rotating part 2512 and the base 221; in this embodiment, the first rotating part 2512 is provided with a first arc track 2511, and the first arc track 2511 is rotatably connected to the first arc groove 2233. Optionally, the first arc tracks 2511 are respectively provided at opposite ends of the first rotating part 2512, and the two first arc tracks 2511 are coaxial. Optionally, the first rotating part 2512 is a first semi-cylinder, and the first connecting part 2514 is a first connecting piece connected to the peripheral wall of the first semi-cylinder. The first semi-cylinder is provided with first arc rails 2511 at opposite ends along its axial direction, and the axes of the two first arc rails 2511 are coaxial with the first semi-cylinder. The first connecting part 2514 is provided with two first rotating cylinders 2515 spaced from each other on the side away from the first rotating part 2512, and the two first rotating cylinders 2515 are coaxial. The side of the arc rail facing the damping member 260 is provided with a first damping part 2516, and the damping member 260 abuts against the first damping part 2516; when the first rotating part 2512 rotates relative to the base 221, there is a large friction resistance between the damping member 260 and the first damping part 2516, that is, the first damping part 2516 can increase the friction resistance between the damping member 260 and the first rotating part 2512. The first damping portion 2516 may be, but is not limited to, a damping hole, a damping bump or a damping surface, etc. A first positioning rod 2527 is provided at one end of the first connecting member 252 close to the end of the first rotating member 251, and a positioning groove 2317 is provided on the side support member 231. The axis of the first positioning rod 2527 is parallel to the rotation axis between the first connecting portion 2514 and the first adapter portion 2521, and the first positioning rod 2527 is rollably inserted into the positioning groove 2317.

[0045] The second rotating mechanism 255 includes a second connecting member 257 . One end of the second rotating member 256 is rotatably connected to the second connecting member 257 . One end of the second rotating member 256 away from the second connecting member 257 is rotatably connected to the base 221 . 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 arranged at opposite ends of the second rotating member 256; the rotating member of another rotating mechanism is rotatably connected to the other side of the base 221, and optionally, the second rotating portion 2562 and the base 221 are rotatably connected through the cooperation of a circular arc groove and a circular arc track, the circular arc groove is arranged at one of the second rotating portion 2562 and the base 221, and the circular arc track is arranged at the other of the second rotating portion 2562 and the base 221; in this embodiment, the second rotating portion 2562 is provided with a second circular arc track 2561, and the second circular arc track 2561 is rotatably connected to the second circular arc groove 2235. Specifically, the second circular arc tracks 2561 are respectively arranged at opposite ends of the second rotating portion 2562, and the two second circular arc tracks 2561 are coaxial. Optionally, the second rotating part 2562 is a second semi-cylinder, and the second connecting part 2564 is a second connecting piece connected to the peripheral wall of the second semi-cylinder. The second semi-cylinder is provided with second arc rails 2561 at opposite ends along its axial direction, and the axes of the two second arc rails 2561 are coaxial with the second semi-cylinder. The second connecting part 2564 is provided with two second rotating cylinders 2565 spaced from each other on the side away from the second rotating part 2562, and the two second rotating cylinders 2565 are coaxial. The second arc rail 2561 is provided with a second damping part 2566 on the side facing the damping member 260, and the damping member 260 abuts against the second damping part 2566; when the second rotating part 2562 rotates relative to the base 221, there is a large friction resistance between the damping member 260 and the second damping part 2566, that is, the second damping part 2566 can increase the friction resistance. The second damping part 2566 can be, but not limited to, a damping hole, a damping bump, or a damping surface.

[0046] 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 a 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 slide portion 2523, and the first adapter portion 2521 and the first guide slide portion 2523 are respectively provided at two opposite ends of the first connecting member 252. The first connecting portion 2514 is rotatably connected to the first adapter portion 2521, and the first guide slide portion 2523 is provided with a first slide groove 2520 along a length direction perpendicular to the first connecting member 252. Specifically, two first avoidance openings 2524 are spaced apart on the front of the first adapter portion 2521, and the first adapter portion 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 communicates with the two first avoidance openings 2524. When the two first rotating drums 2515 are rotatably accommodated in the two first avoiding openings 2524, the inner cavity of the first rotating drum 2515 is coaxial with the first connecting hole 2525, and the first transfer shaft 253 is penetrated through the first connecting hole 2525 and the inner cavity of the first rotating drum 2515, so that the first rotating member 251 is rotatably connected to the first connecting member 252. A first guide groove 2526 is provided on the front surface of the first guide slide 2523, and the opposite ends of the first guide groove 2526 respectively penetrate the opposite sides of the first guide slide 2523, and the opposite inner sides of the first guide groove 2526 are respectively provided with first slide grooves 2520, and the opposite ends of the first slide groove 2520 respectively penetrate the opposite sides of the first guide slide 2523. In this embodiment, the first slide grooves 2520 are respectively provided on the opposite inner sides of the first guide groove 2526.

[0047] The second connecting member 257 is in a strip shape, and the second rotating grooves 2572 are respectively provided at two opposite ends of the second connecting member 257 away from the second rotating member 256. The second connecting member 257 includes a second adapter 2571 and a second guide slide 2573, and the second adapter 2571 and the second guide slide 2573 are respectively provided at two opposite ends of the second connecting member 257. The second connecting member 2564 is rotatably connected to the second adapter 2571, and the second guide slide 2573 is provided with a second slide groove 2570 along a longitudinal direction perpendicular to the second connecting member 257. Specifically, two second avoidance openings 2574 are spaced apart on the front of the second adapter 2571, and the second adapter 2571 is provided with a second connecting hole 2575 along the longitudinal direction of the second connecting member 257, and the second connecting hole 2575 communicates with the two second avoidance openings 2574. When the two second rotating drums 2565 are rotatably accommodated in the two second avoiding openings 2574, the inner cavity of the second rotating drum 2565 is coaxial with the second connecting hole 2575, and the second transfer shaft 258 is penetrated through the second connecting hole 2575 and the inner cavity of the second rotating drum 2565, so that the second rotating member 256 is rotatably connected to the second connecting member 257. A second guide groove 2576 is provided on the front surface of the second guide slide 2573, and the opposite ends of the second guide groove 2576 respectively penetrate the opposite sides of the second guide slide 2573, and 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 sides of the second guide slide 2573. In this embodiment, the second slide grooves 2570 are respectively provided on the opposite inner sides of the second guide groove 2576. A second positioning rod 2577 is provided at one end of the second connecting member 257 close to one end of 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 can be rolled through the positioning groove 2317.

[0048] like Fig.10 and Fig.11As shown, the damping member 260 includes a butting column 261, which can be inserted into the guide hole 2210, one end of the butting column 261 butts against the arc rail, and the other end of the butting column 261 is connected to the push member. Specifically, the butting columns 261 of the two damping members 260 are respectively inserted into the two guide holes 2210, one end of one butting column 261 butts against the first arc rail 2511, and the other end is connected to one of the first push members 244; one end of the other butting column 261 butts against the second arc rail 2561, and the other end is connected to the other first push member 244. Optionally, the end surface of the damping member 260 facing the arc rail is provided with a skid-blocking portion 262, and the skid-blocking portion 262 can increase the friction resistance between the damping member 260 and the arc rail. Optionally, the abutting column 261 may be, but is not limited to, a regular column or an irregular column such as a circular column, a polygonal column, or an elliptical column; in this embodiment, the abutting column 261 is a circular column.

[0049] Optionally, the damping member 260 further includes a stopper 264 and a positioning column 266. The stopper 264 is disposed at one end of the abutting column 261. Specifically, the stopper 264 is disposed at one end of the abutting column 261 away from the arc track, and the stopper 264 is used to stop at the guide hole 2210. The positioning column 266 is disposed at one end of the stopper 264 away from the abutting column 261, and the positioning column 266 is connected to the first abutting member 244. In this embodiment, the stopper 264 is a circular disk, and the positioning column 266 is a circular column. The axis of the abutting column 261, the axis of the stopper 264, and the axis of the positioning column 266 are collinear.

[0050] Optionally, the first push member 244 may be, but is not limited to, a spring, an elastic rubber column, an elastic plastic column, etc. In this embodiment, the first push member 244 is a spring.

[0051] The rotating shaft device 22 also includes a connecting rod and a supporting member. The connecting rod is rotatably connected to the base 221. The supporting member is arranged between the connecting rod and the first pushing member 244. The supporting member and the connecting rod are matched through a cam combination. The end of the first pushing member 244 facing away from the damping member 260 pushes the supporting member against the connecting rod. Specifically, the folding assisting mechanism 24 also includes a pair of connecting shafts 220, a first connecting rod 271, a second connecting rod 275, a first resisting member 277, and a linkage member 28 connected to opposite sides of the base 221; the axes of the pair of connecting shafts 220 are spaced and parallel; one connecting rod is connected to one of the connecting shafts 220, and the other connecting rod is connected to the other connecting shaft 220. Specifically, the first connecting rod 271 is rotatably connected to one of the connecting shafts 220, the second connecting rod 275 is rotatably connected to the other connecting shaft 220, the first resisting member 277 is arranged between the first connecting rod 271 and the second connecting rod 275 and the first resisting member 244, and the linkage member 28 is arranged between the first connecting rod 271 and Between the first and second connecting rods 275, the linkage member 28 is connected to a pair of connecting shafts 220 and can slide along the axial direction of the connecting shaft 220 relative to the base 221. The first connecting rod 271 and the second connecting rod 275 are respectively connected to the linkage member 28 through spiral surface cooperation; when the first connecting rod 271 or the second connecting rod 275 rotates around the corresponding connecting shaft 220, the linkage member 28 slides along the axial direction of the connecting shaft 220 to drive the first connecting rod 271 and the second connecting rod 275 to rotate synchronously in opposite directions relative to the base 221 and fold or unfold with each other, so as to drive the first rotating mechanism 250 and the second rotating mechanism 255 to rotate synchronously relative to the base 221 to achieve mutual folding or flattening.

[0052] The first connecting rod 271 also includes a first rotating portion 2713 rotatably connected to the connecting shaft 220, a first sliding portion 2714, and a first connecting plate 2715 connected between the first rotating portion 2713 and the first sliding portion 2714; the end of the connecting rod away from the base 221 is slidably connected to the corresponding connecting member, specifically, the first sliding portion 2714 is provided with a first slide rail 2710, and the first slide rail 2710 is slidably inserted with the first slide groove 2520 of the first connecting member 252, specifically, the first sliding portion 2714 is a first rectangular plate, and the first slide rails 2710 are respectively provided on the opposite sides of the first rectangular plate, and the first slide rails 2710 are perpendicular to the axis of the second rotating portion 2753. Specifically, the first rotating portion 2713 is a first rotating cylinder, and the first rotating cylinder is provided with a first rotating hole 2712 along its axial direction, and the connecting shaft 220 is inserted into the first rotating hole 2712 of the first rotating cylinder. A first cam 2716 is provided at one end of the first rotating part 2713, and the first rotating part 2713 is coaxial with the first cam 2716. The first cam 2716 includes a concave-convex surface provided at the end of the first rotating cylinder, and the concave-convex surface includes a first protruding portion 2716a and a first recessed portion 2716b, and the first protruding portion 2716a and the first recessed portion 2716b are sequentially arranged at intervals along the circumference of the rotating cylinder; the number of the first protruding portions 2716a and the number of the first recessed portions 2716b can be set as needed, such as the first cam 2716 can include one first protruding portion 2716a and one first recessed portion 2716b, two first protruding portions 2716a and two first recessed portions 2716b, three first protruding portions 2716a and three first recessed portions 2716b, or four first protruding portions 2716a and four first recessed portions 2716b, etc. In this embodiment, the first cam 2716 includes three first protrusions 2716a and three first recesses 2716b that are arranged at intervals along the circumference of the rotating cylinder.

[0053] The first connecting rod 271 is provided with a first receiving groove 2717, the linkage member 28 is passed through a pair of connecting shafts 220, and one side portion of the linkage member 28 is received in the first receiving groove 2717. Specifically, the outer peripheral surface of the first rotating portion 2713 is provided with a first receiving groove 2717, the first receiving groove 2717 extends to the first connecting plate 5715 along the radial direction of the first rotating portion 2713, and the first receiving groove 2717 is communicated with the first rotating hole 2712. Specifically, the first connecting rod 271 includes a first abutting spiral surface 2717a and a second abutting spiral surface 2717b, the rotation direction of the first abutting spiral surface 2717a is the same as the rotation direction of the second abutting spiral surface 2717b, the axis of the first abutting spiral surface 2717a is colinear with the axis of the second abutting spiral surface 2717b, and the first abutting spiral surface 2717a and the second abutting spiral surface 2717b are respectively located at opposite ends of the first receiving groove 2717. Specifically, the first abutting spiral surface 2717a is provided on the inner end surface of the first receiving groove 2717 close to the first cam 2716, and the second abutting spiral surface 2717b is provided on the inner end surface of the first receiving groove 2717 away from the first cam 2716. The axis of the first abutting spiral surface 2717a, the axis of the second abutting spiral surface 2717b, and the rotation axis of the first rotating part 2713 are collinear. The first rotating part 2713 is provided with a first anti-slip groove 2718 connected to the first rotating hole 2712. Specifically, the first anti-slip groove 2718 is located on the outer peripheral surface of the first rotating part 2713 and extends along the radial direction of the first rotating part 2713 to the first connecting plate 2715. The first connecting rod 271 and the side support member 231 are connected by the cooperation of the first limiting rod and the limiting groove. The axis of the first limiting rod is parallel to the rotation axis between the middle support member 234 and the side support member 231. The first limiting rod is arranged at one of the first connecting rod 271 and the side support member 231, and the limiting groove is arranged at the other of the first connecting rod 271 and the side support member 231. In this embodiment, the first connecting rod 271 is provided with a first limiting rod 2719, and the side support member 231 is provided with a limiting groove 2315. Optionally, a first limiting rod 2719 is provided at one end of the first sliding portion 2714 which is away from the first slide rail 2620 and away from the first rotating portion 2713. The axis of the first limiting rod 2719 is parallel to the axis of the first rotating portion 2713, and the first limiting rod 2719 can be rotatably inserted into the limiting groove 2315.

[0054] The second connecting rod 275 further includes a second rotating portion 2753 rotatably connected to the connecting shaft 220, a second sliding portion 2754, and a second connecting plate 2755 connected between the second rotating portion 2753 and the second sliding portion 2754; the second sliding portion 2754 is provided with a second slide rail 2750, and the second slide rail 2750 is slidably inserted with a second slide groove 2570 of the second connecting member 257; specifically, the second sliding portion 2754 is a second rectangular plate, and the second slide rails 2750 are respectively provided on opposite sides of the second rectangular plate, and the second slide rails 2750 are perpendicular to the axis of the second rotating portion 2753. Specifically, the second rotating portion 2753 is a second rotating cylinder, and the second rotating cylinder is provided with a second rotating hole 2752 along its axial direction, and the connecting shaft 220 is inserted into the second rotating hole 2752 of the second rotating cylinder. A second cam 2756 is provided at one end of the second rotating portion 2753, and the second rotating portion 2753 and the second cam 2756 are coaxial. The second cam 2756 includes a concave-convex surface provided at the end of the second rotating cylinder, the concave-convex surface includes a second protruding portion 2756a and a second recessed portion 2756b, and the second protruding portion 2756a and the second recessed portion 2756b are sequentially arranged at intervals along the circumference of the second rotating cylinder; the number of the second protruding portions 2756a and the number of the second recessed portions 2756b can be set as needed, such as the second cam 2756 includes one second protruding portion 2756a and one second recessed portion 2756b, two second protruding portions 2756a and two second recessed portions 2756b, three second protruding portions 2756a and three second recessed portions 2756b, or four second protruding portions 2756a and four second recessed portions 2756b, etc. In this embodiment, the second cam 2756 includes three second protruding portions 2756a and three second recessed portions 2756b arranged at intervals along the circumference of the rotating cylinder.

[0055] The second connecting rod 275 is provided with a second receiving groove 2757, the linkage member 28 is passed through the pair of connecting shafts 220, and the other side of the linkage member 28 is received in the second receiving groove 2757. Specifically, the outer circumferential surface of the second rotating portion 2753 is provided with a second receiving groove 2757, the second receiving groove 2757 extends along the radial direction of the second rotating portion 2753 to the second connecting plate 5755, and the second receiving groove 2757 is communicated with the second rotating hole 2752. Specifically, the second connecting rod 275 includes a third abutting spiral surface 2757a and a fourth abutting spiral surface 2757b, the rotation direction of the third abutting spiral surface 2757a is the same as the rotation direction of the fourth abutting spiral surface 2757b, the rotation direction of the first abutting spiral surface 2717a is opposite to the rotation direction of the third abutting spiral surface 2757a, and the rotation direction of the second abutting spiral surface 2717b is opposite to the rotation direction of the fourth abutting spiral surface 2757b; the axis of the third abutting spiral surface 2757a is colinear with the axis of the fourth abutting spiral surface 2757b, and the third abutting spiral surface 2757a and the fourth abutting spiral surface 2757b are respectively located at opposite ends of the second receiving groove 2757. Specifically, the third abutting spiral surface 2757a is provided on the inner end surface of the second receiving groove 2757 close to the second cam 2756, and the fourth abutting spiral surface 2757b is provided on the inner end surface of the second receiving groove 2757 away from the second cam 2756. The axis of the third abutting spiral surface 2757a, the axis of the fourth abutting spiral surface 2757b, and the rotation axis of the second rotating part 2753 are collinear. The second rotating part 2753 is provided with a second anti-slip groove 2758 connected to the second rotating hole 2752. Specifically, the second anti-slip groove 2758 is located on the outer peripheral surface of the second rotating part 2753 and extends to the second connecting plate 2755 along the radial direction of the second rotating part 2753. The second connecting rod 275 and the side support member 231 are connected through the cooperation of the second limiting rod and the limiting groove. The axis of the second limiting rod is parallel to the rotation axis between the middle support member 234 and the side support member 231. The second limiting rod is arranged at one of the second connecting rod 275 and the side support member 231, and the limiting groove is arranged at the other of the second connecting rod 275 and the side support member 231. In this embodiment, the second connecting rod 275 is provided with a second limiting rod 2759, and the side support member 231 is provided with a limiting groove 2315. Optionally, a second limiting rod 2759 is provided at one end of the second sliding portion 2754 away from the second rotating portion 2753, and the axis of the second limiting rod 2759 is parallel to the axis of the second rotating portion 2753. The second limiting rod 2759 can be rotatably inserted into the limiting groove 2315.

[0056] The first helical surface 281 and the second helical surface 283 are respectively provided at two opposite ends of one side of the linkage member 28, and the third helical surface 285 and the fourth helical surface 286 are respectively provided at two opposite ends of the other side of the linkage member 28; the first helical surface 281 of the linkage member 28 is coaxial with the second helical surface 283, and the third helical surface 285 is coaxial with the fourth helical surface 286; the first abutting helical surface 2717a cooperates with the first helical surface 281, the second abutting helical surface 2717b cooperates with the second helical surface 283, the third abutting helical surface 2757a cooperates with the third helical surface 285, and the fourth abutting helical surface 2757b cooperates with the fourth helical surface 286; the first helical surface 281 and the second helical surface 283 have the same rotation direction, the third helical surface 285 and the fourth helical surface 286 have the same rotation direction, the first helical surface 281 and the third helical surface 285 have opposite rotation directions, and the second helical surface 283 and the fourth helical surface 286 have opposite rotation directions. The first connecting rod 271 can rotate around one of the connecting shafts 220, but the first connecting rod 271 cannot move along the axial direction of the connecting shaft 220; the second connecting rod 275 can rotate around the other connecting shaft 220, but the second connecting rod 275 cannot move along the axial direction of the connecting shaft 220; the linkage member 28 is slidably sleeved on a pair of connecting shafts 220 along the axial direction of the connecting shaft 220. When the first connecting rod 271 rotates around the corresponding connecting shaft 220, the first abutting spiral surface 2717a and the second abutting spiral surface 2717b respectively push the first spiral surface 281 and the second spiral surface 283 on one side of the linkage member 28 in a sliding manner, so that the linkage member 28 moves along the axial direction of the connecting shaft 220 relative to the base 221. At the same time, the third spiral surface 285 and the fourth spiral surface 286 on the other side of the linkage member 28 respectively push the third abutting spiral surface 2757a and the fourth abutting spiral surface 2757b of the second connecting rod 275 in a sliding manner. 57b, since the first link member 271 and the second link member 275 cannot move axially along the connecting shaft 220, the two link members rotate in opposite directions synchronously relative to the base 221; specifically, the sliding of the linkage member 28 along the connecting shaft 220 can realize the synchronous opposite rotation of the first link member 271 and the second link member 275 to be folded or unfolded, and at the same time, the two rotating mechanisms rotate in opposite directions synchronously relative to the base 221, that is, the first rotating mechanism 250 and the second rotating mechanism 255 rotate in opposite directions synchronously relative to the base 221, respectively.

[0057] Specifically, the linkage 28 includes two parallel and spaced sliding cylinders 282 and a connecting plate 284 connected between the two sliding cylinders 282, a pair of connecting shafts 220 are respectively passed through the two sliding cylinders 282, the first helical surface 281 and the second helical surface 283 are respectively arranged on the opposite two end surfaces of one of the sliding cylinders 282, the third helical surface 285 and the fourth helical surface 286 are respectively arranged on the opposite two end surfaces of the other sliding cylinder 282; the axis of the first helical surface 281 of one sliding cylinder 282 is collinear with the axis of the second helical surface 283, and the axis of the third helical surface 285 of the other sliding cylinder 282 is collinear with the axis of the fourth helical surface 286. Further, the first helical surface 281 and the third helical surface 285 are respectively arranged on the side of the two sliding cylinders 282 close to the connecting plate 284, and the first helical surface 281 and the third helical surface 285 respectively rotate less than one circle around the axis of the corresponding sliding cylinder 282, and the second helical surface 283 and the fourth helical surface 286 are respectively arranged on the side of the two sliding cylinders 282 away from the connecting plate 284, and the second helical surface 283 and the fourth helical surface 286 respectively rotate less than one circle around the axis of the two sliding cylinders 282. The back of the connecting plate 284 is provided with a slide groove 2840, and the opposite ends of the slide groove 2840 respectively pass through the opposite end surfaces of the connecting plate 284.

[0058] The first supporting member 277 is slidably mounted on a pair of connecting shafts 220, and the first supporting member 277 cooperates with the first connecting rod 271 and the second connecting rod 275 through a cam. The first pushing member 244 is used to push the first supporting member 277 and the damping member 260, so that the first supporting member 277 and the first connecting rod 271 and the second connecting rod 275 abut against each other, and the two damping members 260 respectively abut against the first rotating member 251 and the second rotating member 256. When the first link member 271 and the second link member 275 rotate around the corresponding connecting shaft 220, there is friction resistance between the first supporting member 277 and the first link member 271 and the second link member 275, and one damping member 260 has friction resistance with the first rotating portion 2512, and the other damping member 260 has friction resistance with the second rotating portion 2562. These friction resistances can prevent the first link member 271 and the second link member 275 from rotating around the pair of connecting shafts 220. The first supporting member 277 cooperates with the first link member 271 and the second link member 275 through a cam assembly, and the end of the first pushing member 244 away from the damping member 260 pushes the first supporting member 277. In this embodiment, the first abutting member 277 includes two first abutting cams 2770 sleeved on a pair of connecting shafts 220, and the pair of connecting shafts 220 are respectively penetrated through the first cam 2716 of the first link member 271 and the second cam 2756 of the second link member 275, and the two first abutting cams 2770 of the first abutting member 277, so that the two first abutting cams 2770 are respectively rotatably abutted against the first cam 2716 of the first link member 271 and the second cam 2756 of the second link member 275. Specifically, the first abutting member 277 includes two first abutting cylinders 2772 spaced in parallel and a first connecting portion 2773 connected between the two first abutting cylinders 2772, the axes of the two first abutting cylinders 2772 are spaced in parallel, and the two first abutting cylinders 2772 can be respectively slidably sleeved on the pair of connecting shafts 220.

[0059] Each first abutting cylinder 2772 is provided with a first abutting cam 2770 at one end facing the first link member 271. Each first abutting cam 2770 includes a concave-convex surface provided at one end of the first abutting cylinder 2772 away from the first abutting member 244. The concave-convex surface includes a third protrusion 2774 and a third recess 2776. The third protrusion 2774 and the third recess 2776 are sequentially arranged at intervals along the circumference of the first abutting cylinder 2772. The number of the third protrusions 2774 and the number of the third recess 2776 can be set as needed, such as the first abutting cam 2770 can include one third protrusion 2774 and one third recess 2776, two third protrusions 2774 and two third recesses 2776, three third protrusions 2774 and three third recesses 2776, or four third protrusions 2774 and four third recesses 2776. In this embodiment, the first abutting cam 2770 includes three third protrusions 2774 and three third recesses 2776 arranged at intervals along the circumference of the first abutting cylinder 2772. The axis of each first abutting cam 2770 is colinear with the axis of the corresponding first abutting cylinder 2772. Preferably, the opposite end surfaces of the first abutting member 277 form arc surfaces to facilitate the folding or unfolding of the rotating shaft device 50.

[0060] like Figure 4 and Figure 5 As shown, the front of the back shell 29 is provided with a positioning portion 291 for positioning on the base, and the positioning portion 291 and the base can be fixedly connected by means of, but not limited to, snap-on, screw-on 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. The positioning column 293 is snapped into the positioning hole of the base 221, so that the base 221 can be fixedly connected to the positioning portion 291. In other embodiments, the positioning portion 221 can also be provided with a positioning hole, and the back of the base 221 is provided with a positioning column. The matching connection between the positioning column and the positioning hole can enable the base 221 to be fixedly connected to the positioning portion. In this embodiment, the front of the back shell 29 is provided with three positioning portions 291, and the three positioning portions 291 are arranged at intervals from each other along the length direction of the back shell 29.

[0061] Please also read Figure 7-Figure 11When assembling the first folding assisting mechanism 24, the linkage member 28 is arranged between a pair of connecting rod members, that is, the first rotating portion 2713 of the first connecting rod member 271 and the second rotating portion 2753 of the second connecting rod member 275 are respectively placed on opposite sides of the linkage member 28, so that the connecting rod member and the linkage member 28 are connected through the cooperation of the double helical surface group, that is, the first abutting helical surface 2717a and the second abutting helical surface 2717b of the first rotating portion 2713 are respectively attached to the first helical surface 281 and the second helical surface 283 of one of the sliding cylinders 282, and the third abutting helical surface 2757a and the fourth abutting helical surface 2757b of the second rotating portion 2753 are respectively attached to the third helical surface 285 and the fourth helical surface 286 of the other sliding cylinder 282, so that one of the sliding cylinders 282 is coaxial with the first rotating portion 2713, and the other sliding cylinder 282 is coaxial with the second rotating portion 2753. The first resisting member 277 is placed on one side of the first link member 271 and the second link member 275, so that the two first resisting cams 2770 of the first resisting member 277 respectively cooperate with the first cam 2716 of the first link member 271 and the second cam 2756 of the second link member 275. The linkage member 28 is placed on the second mounting portion 224 of the base 221, so that the guide rail 2221 can be slidably accommodated in the slide groove 2840 of the linkage member 28, the two second anti-slip plates 2247 are respectively accommodated in the first anti-slip groove 2718 and the second anti-slip groove 2758, and the end surface of the first rotating portion 2713 away from the first cam 2716 and the end surface of the second rotating portion 2753 away from the second cam 2756 are respectively attached to the two first anti-slip plates 2245 to limit the first rotating portion 2713 and the second rotating portion 2753 from moving along the connecting shaft 220; the two connecting shafts 220 are placed on the second mounting portion 224 of the base 221, so that the guide rail 2221 can be slidably accommodated in the slide groove 2840 of the linkage member 28, the two second anti-slip plates 2247 are respectively accommodated in the first anti-slip groove 2718 and the second anti-slip groove 2758, and the end surface of the first rotating portion 2713 away from the first cam 2716 and the end surface of the second rotating portion 2753 away from the second cam 2756 are respectively attached to the two first anti-slip plates 2245 to limit the first rotating portion 2713 and the second rotating portion 2753 from moving along the connecting shaft 220; 20 are respectively inserted into the two through holes 2242 of the first base 221, the two first axial holes 2245a of the first stop plate 2243, the first rotating hole 2712 and the second rotating hole 2752, the inner cavities of the two sliding cylinders 282 of the linkage member 28, the two second axial holes 2247a of the second stop plate 2246, and the two first supporting cylinders 2772 of the first supporting member 277, so that one end of the connecting shaft 220 is positioned at the corresponding first axial hole 2245a, and the other end extends out of the first supporting cylinder 2772 away from the side of the first top cam 2770. The two first rotating cylinders 2515 of the first rotating member 251 are respectively accommodated in the two first avoidance openings 2524 of the first connecting member 252, and the first transfer shaft 253 is passed through the first connecting hole 2525 and the inner cavity of the first rotating cylinder 2515, so that the first rotating member 251 is rotatably connected to the first connecting member 252; the two second rotating cylinders 2565 of the second rotating member 256 are respectively accommodated in the two second avoidance openings 2574 of the second connecting member 257, and the second transfer shaft 258 is passed through the second connecting hole 2575 and the inner cavity of the second rotating cylinder 2565, so that the second rotating member 256 is rotatably connected to the second connecting member 257.The first rotating portion 2512 is accommodated in the first rotation-assisting groove 2236 of the base 221, so that the two first arc rails 2511 can be rotatably accommodated in the two first arc grooves 2233 respectively; the second rotating portion 2562 is placed in the second rotation-assisting groove 2237, so that the two second arc rails 2561 can be rotatably accommodated in the two second arc grooves 2235 respectively; the abutting columns 261 of the two damping members 260 are respectively inserted into the two guide holes 2210 of the first base 221, and the two first push members 244 are respectively placed between the first support member 277 and the two damping members 260, and the positioning columns 266 of the two damping members 260 are respectively positioned at one end of the two first push members 244, and the ends of the two connecting shafts 220 away from the first anti-sliding plate 2243 are respectively positioned at the other end of the two first push members 244. The opposite ends of the damping member 260 and the first supporting member 277 are respectively pushed against the two damping members 260, so that the two damping members 260 are respectively pressed against the first arc rail 2511 and the second arc rail 2561, and the two first pressing cams 2770 are respectively pressed against the first cam 2716 and the second cam 2756, and the first pressing spiral surface 2717a and the second pressing spiral surface 2717b of the first connecting rod 271 cooperate with the first spiral surface 281 and the second spiral surface 283 respectively, and the third pressing spiral surface 2757a and the fourth pressing spiral surface 2757b of the second connecting rod 275 cooperate with the third spiral surface 285 and the fourth spiral surface 286 respectively, thereby ensuring that the first connecting rod 271 and the second connecting rod 275 are closely matched with the linkage member 28 during the rotation of the connecting shaft 220, thereby reducing the asynchronous influence caused by the matching clearance. When the first rotating member 251 and the second rotating member 256 rotate respectively relative to the base 221, the linkage member 28 slides relative to the base 221 to realize the synchronous reverse rotation of the first connecting rod member 271 and the second connecting rod member 275, the two damping members 260 have friction resistance with the first circular arc rail 2511 and the second circular arc rail 2561 respectively, the first rotating member 251 and the second rotating member 256 have friction resistance with the base 221 respectively, and the two first abutting cams 2770 have friction torque with the first cam 2716 and the second cam 2756 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.

[0062] Please also read Figure 12-Figure 15The 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 is based on the first folding-assisting mechanism 24 and adds a positioning member 225, a second supporting member 278, a second pushing member 248, a positioning gasket 247 and a snap-in piece 249. The second supporting member 278 is slidably mounted on a pair of connecting shafts 220a, and the second supporting member 278 cooperates with the first connecting rod member 271 and the second connecting rod member 275 through a cam. The second pushing member 248 is used to push the second supporting member 278, so that the second supporting member 278 and the first connecting rod member 271 and the second connecting rod member 275 abut against each other. The base 221a of the second folding assisting mechanism 24a is a base 221 with a third mounting portion 226 added thereto. Specifically, the base 221a includes a support bar 222, a first mounting portion 223, a second mounting portion 224 and a third mounting portion 226. The first mounting portion 223 and the third mounting portion 226 are located at opposite ends of the support bar 222, and the second mounting portion 224 is located between the first mounting portion 223 and the third mounting portion 226. The first mounting portion 223 includes a first mounting portion 224 and a second mounting portion 226. A first protrusion 2232 and a second protrusion 2234 are provided on opposite sides of the support bar 222. The first protrusion 2232 is provided with a first arc groove 2233 on the side facing the first rotation-assisting groove 2236, and the second protrusion 2234 is provided with a second arc groove 2235 on the side facing the second rotation-assisting groove 2237. The first mounting portion 223 also includes a guide slider 2238 close to the first rotation-assisting groove 2236, and opposite sides of the guide slider 2238 protrude from opposite sides of the support bar 222. The third mounting portion 226 is a connecting plate connected between the support plate 2241 and the second anti-sliding plate 2246, and the length direction of the connecting plate is consistent with the length direction of the support bar 222. The connecting shaft 220a includes a shaft body 2201 and a cover body 2203 disposed at one end of the shaft body 2201. A clamping groove 2205 is disposed at one end of the outer circumference of the shaft body 2201 away from the cover body 2203. The clamping groove 2205 is arranged in a circle around the circumference of the shaft body 2201. In this embodiment, the cover body 2203 is a circular cover, and the diameter of the cover body 2203 is smaller than the inner diameter of the through hole 2242 of the base 221.

[0063] The positioning member 225 is slidably connected to the base 221, and the first rotating member 251 and the positioning member 225 are rotatably connected through the cooperation of the first circular arc track and the third circular arc groove, the first circular arc track is provided at one of the first rotating member 251 and the positioning member 225, and the third circular arc groove is provided at the other of the first rotating member 251 and the positioning member 225; the second rotating member 256 and the positioning member 225 are rotatably connected through the cooperation of the second circular arc track and the third circular arc groove, the second circular arc track is provided at one of the second rotating member 256 and the positioning member 225, and the third circular arc groove is provided at the other of the second rotating member 256 and the positioning member 225; when the positioning member 225 is installed to the first mounting portion 223, the axis of one of the third circular arc grooves is collinear with the axis of the first circular arc groove 2233, and the axis of the other third circular arc groove is collinear with the axis of the second circular arc groove 2235. The positioning member 225 is used to position the first rotating member 251 and the second rotating member 256 together with the first mounting portion 223. Specifically, the positioning member 225 includes positioning portions 2252 located at opposite ends thereof, and a connecting portion 2253 connected between the two positioning portions 2252. A third circular arc groove 2255 is respectively provided on the same side of the two positioning portions 2252. The axes of the two third circular arc grooves 2255 are parallel. One of the first circular arc rails 2511 of the first rotating member 251 is rotatably accommodated in one of the third circular arc grooves 2255. One of the second circular arc rails 2561 of the second rotating member 256 is rotatably accommodated in the other third circular arc groove 2255. The sides of the two positioning parts 2252 facing away from the third arc groove 2255 are respectively provided with sliding holes 2256, and the two sliding holes 2256 are respectively connected to the two third arc grooves 2255. The abutting posts 261 of the two damping members 260 can be respectively penetrated through the two sliding holes 2256 of the positioning part 225, and the end surface of each abutting post 261 facing away from the positioning post 266 exposes the corresponding third arc groove 2255. The positioning part 225 and the base 221 are slidably connected through the cooperation of the guide slider and the guide slide groove, the guide slider is provided on one of the positioning part 225 and the base 221, and the guide slide groove is provided on the other of the positioning part 225 and the base 221. In this embodiment, the back of the positioning part 225 is provided with a guide slide groove 2257, and the third mounting part can be slidably accommodated in the guide slide groove 2257, so that the positioning part 225 can move along the axial direction parallel to the connecting shaft 220. Optionally, a guide groove 2752 is provided on the back side of the connecting portion 2253 along the axial direction of the third arc groove 2255 , and opposite ends of the guide groove 2752 respectively pass through opposite side surfaces of the positioning member 225 , and the guide sliding block 2262 is slidably inserted in the guide groove 2752 .

[0064] First anti-slip grooves 2718 are respectively provided at opposite ends of the outer circumference of the first rotating part 2713 of the first link member 271, and the first receiving groove 2717 is located between the two first anti-slip grooves 2718; second anti-slip grooves 2758 are respectively provided at opposite ends of the outer circumference of the second rotating part 2753 of the second link member 275, and the second receiving groove 2757 is located between the two second anti-slip grooves 2758. First cams 2716 are respectively provided at opposite ends of the first rotating part 2713, and the two first cams 2716 are coaxial with the first rotating part 2713; second cams 2756 are respectively provided at opposite ends of the second rotating part 2753, and the two second cams are coaxial with the second rotating part 2753. The structure of the second abutting member 278 is similar to that of the first abutting member 277. Specifically, the second abutting member 278 includes two second abutting cams 2780 sleeved on a pair of connecting shafts 220. The pair of connecting shafts 220 can be respectively penetrated through the inner cavities of the two second abutting cams 2780. The two second abutting cams 2780 are respectively rotatably abutted against the first cam 2716 of the first connecting rod 271 and the second cam 2756 of the second connecting rod 275. Specifically, the second abutting member 278 includes two second abutting cylinders 2782 spaced in parallel and a second connecting portion 2783 connected between the two second abutting cylinders 2782. The axes of the two second abutting cylinders 2782 are spaced in parallel. The two second abutting cylinders 2782 can be respectively slidably sleeved on the pair of connecting shafts 220. Each second abutting cylinder 2782 is provided with a second abutting cam 2780 at one end facing the first link member 271. Each second abutting cam 2780 includes a concave-convex surface provided at one end of the second abutting cylinder 2782 away from the second abutting member 248. The concave-convex surface includes a fourth protrusion 2784 and a fourth recess 2786. The fourth protrusion 2784 and the fourth recess 2786 are sequentially arranged at intervals along the circumference of the second abutting cylinder 2782. The number of the fourth protrusions 2784 and the number of the fourth recess 2786 can be set as needed, such as the second abutting cam 2780 can include one fourth protrusion 2784 and one fourth recess 2786, two fourth protrusions 2784 and two fourth recesses 2786, three fourth protrusions 2784 and three fourth recesses 2786, or four fourth protrusions 2784 and four fourth recesses 2786, etc. In this embodiment, the second abutting cam 2780 includes three fourth protrusions 2784 and three fourth recesses 2786 arranged at intervals along the circumference of the second abutting cylinder 2782. The axis of each second abutting cam 2780 is colinear with the axis of the corresponding second abutting cylinder 2782. Preferably, the opposite end surfaces of the second abutting member 278 form arc surfaces to facilitate the folding or unfolding of the rotating shaft device 50.

[0065] The gasket 247 includes two circular gaskets 2471 and a first connecting strip 2473 connected between the two circular gaskets 2471. The two circular gaskets 2471 are used to be respectively mounted on a pair of connecting shafts; the clamping piece 249 includes a C-shaped buckle 2491 respectively clamped on a pair of connecting shafts 220 and a second connecting strip 2493 connected between the two C-shaped buckles 2491.

[0066] Optionally, the second push member 248 may be, but is not limited to, a spring, an elastic rubber column, an elastic plastic column, etc. In this embodiment, the second push member 248 is a spring.

[0067] like Figure 12-Figure 15As shown, the assembly process of the second folding-assisting mechanism 24a is similar to that of the first folding-assisting mechanism 24, except that: specifically, the second supporting member 278 is placed on the side of the first connecting rod 271 and the second connecting rod 275 away from the first supporting member 277, so that the two second supporting cams 2780 of the second supporting member 278 respectively cooperate with the first cam 2716 of the first connecting rod 271 and the second cam 2756 of the second connecting rod 275. The linkage member 28 is placed on the second mounting portion 224 of the base 221, so that the guide rail 2221 can be slidably accommodated in the slide groove 2840 of the linkage member 28, the first anti-slip sheet 2245 and the second anti-slip sheet 2247 on one side of the support bar 222 are respectively accommodated in the two first anti-slip grooves 2718 of the first rotating portion 2713, and the first anti-slip sheet 2245 and the second anti-slip sheet 2247 on the other side of the support bar 222 are respectively accommodated in the second anti-slip groove 2758 of the second rotating portion 2753, so as to limit the first The rotating part 2713 and the second rotating part 2753 move along the connecting shaft 220; the two second push members 248 are placed on the opposite sides of the third mounting part 226 of the base 221a, so that the inner cavities of the two second push members 248 are respectively opposite to the inner cavities of the two second holding tubes 2782; the positioning gasket 247 is attached to the ends of the two second push members 248 away from the second holding member 278, so that the inner cavities of the two annular gaskets 2471 are respectively opposite to the inner cavities of the two second holding tubes 2782; the two connecting shafts are The end of the clamping groove 2205 is respectively inserted into the two through holes 2242 of the first base 221, the inner cavities of the two annular pads 2471 of the positioning gasket 247, the inner cavities of the two second push members 248, the inner cavities of the two second holding cylinders 2782 of the second holding member 278, the two first shaft holes 2245a of the first stop plate 2243, the first rotation hole 2712 and the second rotation hole 2752, the inner cavities of the two sliding cylinders 282 of the linkage member 28, and the two inner cavities of the second stop plate 2246. The second shaft hole 2247a and the two first supporting tubes 2772 of the first supporting member 277 make the side of the first supporting member 277 away from the first supporting cam 2770 exposed from the snap-in groove 2205 of the connecting shaft 220; the two C-shaped buckles 2491 of the snap-in plate 249 are respectively snap-fitted to the snap-in grooves 2205 of the two connecting shafts 220, so that the cover bodies 2203 of the two connecting shafts 220 respectively pass through the two through holes 2242 of the base 221 and press against the two annular pads 2471 of the gasket 247.At this time, the two second pushing members 248 are elastically clamped between the gasket 247 and the second supporting member 278, and the two second pushing members 248 elastically push the second supporting member 278 respectively so that the two second resisting cams 2780 respectively resist the first cam 2716 and the second cam 2756, and the first connecting rod member 271 and the second connecting rod member 275 can only rotate synchronously around the corresponding connecting shaft 220 and cannot move along the axial direction of the connecting shaft 220. The linkage member 28 can slide along the guide rail 2221, and the two first resisting cams 2770 of the first supporting member 277 respectively resist the first cam 2716 and the second cam 2756 on the same side, and the two second resisting cams 2780 of the second supporting member 278 respectively resist the first cam 2716 and the second cam 2756 on the other side.

[0068] The first rotating part 2512 is accommodated in the first rotation-assisting groove 2236 of the base 221, so that one of the first arc rails 2511 can be rotatably accommodated in the first arc groove 2233; the second rotating part 2562 is placed in the second rotation-assisting groove 2237, so that one of the second arc rails 2561 can be rotatably accommodated in the second arc groove 2235; the positioning member 225 is installed on the first mounting portion 223 of the base 221, so that the opposite side edges of the guide slide 2238 are respectively inserted into the two guide grooves 2257 of the positioning member 225, so that the other first arc rail 2511 and the second arc rail 2561 can be rotatably accommodated in the two third arc grooves 2257 of the positioning member 225. Slot 2255; insert the push-up columns 261 of the two damping members 260 into the two sliding holes 2256 of the positioning member 225 respectively, place the two first push members 244 between the first holding member 277 and the two damping members 260 respectively, the positioning columns 266 of the two damping members 260 are respectively positioned at one end of the two first push members 244, and the ends of the two connecting shafts 220 away from the cover body 2203 are respectively positioned at the other ends of the two first push members 244; at this time, the opposite ends of the first push member 244 push the damping member 260 and the first holding member 277 respectively, so that the two damping members 260 push against the first circular arc rail 2511 and the second circular arc rail 2561 respectively. When the first rotating member 251 and the second rotating member 256 rotate respectively relative to the base 221, the linkage member 28 slides relative to the base 221 to realize the synchronous reverse rotation of the first connecting rod member 271 and the second connecting rod member 275, the two damping members 260 have friction resistance with the first circular arc rail 2511 and the second circular arc rail 2561 respectively, the first rotating member 251 and the second rotating member 256 have friction resistance with the base 221 respectively, the two first abutting cams 2770 have friction torque with the first cam 2716 and the second cam 2756 respectively, and the two second abutting cams 2780 have friction torque with the first cam 2716 and the second cam 2756 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.

[0069] like Figure 4-Figure 6As shown, when assembling the rotating shaft device 22, the bases of the first folding aid mechanism 24 and the two second folding aid mechanisms 24a are fixedly connected to the three positioning parts 291 of the back shell 29, the two side support members 231 and the two middle support members 234 are rotatably connected through the rotating shaft, and the support assembly 23 is placed on the front of the three folding aid mechanisms, so that the two adjustment rods 2212 of each base 221 are respectively inserted into the corresponding adjustment grooves 2340 of the two middle support members 234, and the first positioning rod 2527 is rotated and slidably inserted into one of the side support members 23 1, the second positioning rod 2577 is rotatably 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 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 respectively; the first limiting rod 2719 is rollably accommodated in the limiting groove 2315 of one side support member 231, and the second limiting rod 2759 is rollably accommodated in the limiting groove 2315 of the other side support member 231.

[0070] When the support assembly 23 is in a completely flattened state, the first rotating mechanism 250 and the second rotating mechanism 255 are in a completely flattened state, and the first connecting rod 271 and the second connecting rod 275 are in a completely flattened state; the two adjusting rods 2212 of each base are respectively positioned at the first positioning sections 2341 corresponding to the two middle supporting members 234, the first positioning rod 2527 of the first connecting member 252 is positioned at the first end 2317a of the corresponding positioning groove 2317, and the second positioning rod 2577 of the second connecting member 257 is positioned at the corresponding positioning groove 2317. The first end 2317a of 317; the first limiting rod 2719 is positioned at the first limiting section 2315a of the corresponding limiting groove 2315, and the second limiting rod 2759 is positioned at the first limiting section 2315a of the corresponding limiting groove 2315; the opposite ends of the first pushing member 244 respectively push the first supporting member 277 and the damping member 260, so that the first supporting member 277 pushes against the first connecting rod member 271 and the second connecting rod member 275, and the two damping members 260 respectively push against the first circular arc rail 2511 and the second circular arc rail 2561. There are friction resistances between the two damping members 260 and the first circular arc rail 2511 and the second circular arc rail 2561 respectively, there are friction resistances between the two first abutting cams 2770 and the first cam 2716 and the second cam 2756 respectively, there are friction resistances between the two second abutting cams 2780 and the first cam 2716 and the second cam 2756 respectively, there are friction resistances between the first rotating member 251 and the second rotating member 256 and the base 221 respectively, these friction resistances keep the support assembly 23 in a completely flat state; the front faces of the two middle support plates and the front faces of the two side support members 231 are coplanar.

[0071] When the support assembly 23 is in a fully folded state, the first rotating mechanism 250 and the second rotating mechanism 255 are in a fully folded state, and the first connecting rod 271 and the second connecting rod 275 are in a fully folded state; the two adjusting rods 2212 of each base 221 are respectively positioned at the second positioning sections 2343 corresponding to the two middle support members 234, the first positioning rod 2527 of the first connecting member 252 is positioned at the second end 2317b of the corresponding positioning groove 2317, and the second positioning rod 2577 of the second connecting member 257 is positioned at the second end 2317b of the corresponding positioning groove 2317; and the first limiting rod 2719 is positioned at the second limiting section 2315b of the corresponding limiting groove 2315, and the second limiting rod 2759 is positioned at the second limiting section 2315b of the corresponding limiting groove 2315; the opposite ends of the first pushing member 244 respectively push the first holding member 277 and the damping member 260, so that the first supporting member 277 abuts the first connecting rod member 271 and the second connecting rod member 275, the two damping members 260 abut against the first circular arc rail 2511 and the second circular arc rail 2561 respectively, the two damping members 260 have friction resistance with the first circular arc rail 2511 and the second circular arc rail 2561 respectively, the two first abutting cams 2770 have friction resistance with the first cam 2716 and the second cam 2756 respectively, the two second abutting cams 2780 have friction resistance with the first cam 2716 and the second cam 2756 respectively, the first rotating member 251 and the second rotating member 256 have friction resistance with the base 221 respectively, and these friction resistances are used to keep the support assembly 23 in a fully folded state; the front sides of the two middle support members 234 and the front sides of the two side support members 231 form a teardrop-shaped space.

[0072] When the two middle support members 234 and the two side support members 231 are in an intermediate state, the first connecting rod member 271 and the second connecting rod member 275 rotate synchronously relative to the base 221 and fold at a specific angle, the linkage member 28 slides along the connecting shaft 220, the first rotating mechanism 250 and the second rotating mechanism 255 rotate synchronously relative to the base 221 and fold at a specific angle, the two first abutting cams 2770 have friction resistance with the first cam 2716 and the second cam 2756 respectively, the two second abutting cams 2780 have friction resistance with the first cam 2716 and the second cam 2756 respectively, and the first rotating member 251 and the second rotating member 256 have friction resistance with the base 221 and the positioning member 225 respectively. In the absence of external force, the two side support members 231 and the two middle support members 234 can be maintained in any folding state except the fully flattened state and the fully folded state, so that the electronic device 100 is in any hovering state.

[0073] It should be noted that: the fully flattened state means that the front faces of the two side supports 231 and the front faces of the two middle supports 234 are coplanar, that is, the angle between the front faces of the side supports 231 and the front faces of the middle supports 234 is 180 degrees, and the angle between the front faces of the two middle supports 234 is 180 degrees; the fully folded state means that the front faces of the two side supports 231 and the front faces of the two middle supports 234 form a teardrop-shaped space; the intermediate state is any folded state except the coplanar and teardrop-shaped space formed by the front faces of the two side supports 231 and the front faces of the two middle supports 234, that is, the folded state of the electronic device 100 in which the angle between the front faces of the two frames 21 is greater than 0 degrees and less than 180 degrees.

[0074] like Figure 1-Figure 3 As shown, when assembling the electronic device 100, the installed hinge device 22 is placed between the two frames 21, and the opposite sides of the hinge device 22 are fixedly connected to the two frames 21. Specifically, the two side support members 231 of the hinge device 22 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 support members 234, and the front faces of the two side support members 231 are coplanar. The bendable area 31 is connected to the front faces of the two side support members 231 and the front faces of the two middle support members 234 of the hinge device 22 through the colloid 301, and the two non-bending areas 33 are respectively attached to the front faces 211 of the two frames 21.

[0075] Please also read Figure 1-Figure 5 and Figure 15-18When the electronic device 100 is folded from the flat state, the first rotating mechanism 250 is rotated relative to the base 221 toward the second rotating mechanism 255, so that the first rotating member 251 rotates relative to the base toward the second rotating member 256. At the same time, the first connecting member 252 drives the axis of the connecting shaft 220 corresponding to the first connecting rod 271 to rotate relative to the base 221 toward the second connecting rod 275. The first abutting spiral surface 2717a and the second abutting spiral surface 2717b of the first rotating portion 2713 slide against the first spiral surface 281 and the second spiral surface 283 of one of the sliding cylinders 282, respectively. The linkage member 28 slides on the base along the axial direction of the connecting shaft 220 in a first direction, so that the third helical surface 285 and the fourth helical surface 286 of the other sliding cylinder 282 respectively slide against the third abutting helical surface 2757a and the fourth abutting helical surface 2757b of the second rotating part 2753, so that the first connecting rod member 271 and the second connecting rod member 275 respectively rotate synchronously in opposite directions around a pair of connecting shafts 220 and approach each other; the first connecting rod member 271 and the second connecting rod member 275 synchronously drive the first rotating mechanism 250 and the second rotating mechanism 255 to rotate synchronously in opposite directions relative to the base 221 and approach each other. In the process of the first rotating mechanism 250 and the second rotating mechanism 255 approaching and rotating each other, the first positioning rod 2527 of the first connecting member 252 rolls with the corresponding positioning groove 2317, the second positioning rod 2577 of the second connecting member 257 rolls with the corresponding positioning groove 2317, and the first limiting rod 2719 of the first connecting rod 271 and the second limiting rod 2759 of the second connecting rod 275 respectively rotate and slide in the limiting grooves 2315 of the two side support members 231, so that the two middle support members 234 rotate relative to the two side support members 231 respectively, and the adjusting rod 2212 of the base 221 rolls along the corresponding adjusting groove 2340 until the two side support members 231 and the two middle support members 234 are bent into a water drop shape.Specifically, 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 2719 rolls from the first limiting section 2315a of the corresponding limiting groove 2315 to the second limiting section 2315b, and at the same time, the second limiting rod 2759 rolls from the first limiting section 2315a of the corresponding limiting groove 2315 to the second limiting section 2315b; the adjusting rod 2212 rolls from the first positioning section 2341 of the corresponding adjusting groove 2340 to the second positioning section 2343, so that the two side support members 231 are away from each other, and at the same time, the two middle support members 234 are relative. The first and second positioning rods 2527 and 2577 are moved away from each other until the adjusting rod 2212 is limited to the second positioning section 2343, the first positioning rod 2527 and the second positioning rod 2577 are respectively positioned at the two second limiting sections 2315b; the damping member 260 slides against the first arc rail 2511 and the second arc rail 2561, the two first abutting cams 2770 of the first abutting member 277 respectively rotate to abut the corresponding first cam 2716 and the second cam 2756, the two second abutting cams 2780 of the second abutting member 278 respectively rotate to abut the corresponding first cam 2716 and the second cam 2756, the first connecting rod 271 and the second connecting rod 275 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.

[0076] During the bending process of the support assembly 23, the first link member 271 and the second link member 275 rotate around the two connecting shafts 220 and approach each other, the first cam 2716 of the first link member 271 and the second cam 2756 of the second link member 275 rotate to abut against the two first abutting cams 2770 of the first abutting member 277, and the two second abutting cams 2780 of the second abutting member 278 rotate to abut against the first cam 2716 of the first link member 271 and the second cam 2756 of the second link member 275, and at the same time The first abutting spiral surface 2717a and the second abutting spiral surface 2717b of the first rotating part 2713 respectively slide against the first spiral surface 281 and the second spiral surface 283 of one of the sliding cylinders 282, and the third abutting spiral surface 2757a and the fourth abutting spiral surface 2757b of the second rotating part 2753 respectively slide against the third spiral surface 285 and the fourth spiral surface 286 of the other sliding cylinder 282, so that the linkage part 28 slides in the first direction along the axial direction of the connecting shaft 220, thereby realizing the synchronous folding of the support assembly 23. Therefore, compared with the prior art, the shaft device generally adopts four-gear transmission to achieve the effect of synchronous and counter-rotation, the manufacturing and assembly of the shaft device is complicated, the cost is high, and the tooth surface wears during the movement, which affects the function. The linkage mechanism of the shaft device 22 of the present application does not need to be realized by the meshing of gears, so that the structure of the shaft device 22 is simple, the manufacturing cost is low, and the overall volume of the shaft device 22 is reduced, which is conducive to the miniaturization development of the shaft device 22 and the lightweight and miniaturization development of the electronic device 100; secondly, under the trend of miniaturization of the 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 insufficient to achieve the opening and closing feel and hovering effect; the first circular arc track 2 of the first rotating member 251 of the shaft device 22 of the present application 511 and the second circular arc track 2561 of the second rotating member 256 slide respectively relative to the damping member 260 and have friction resistance, the first cam 2716 and the second cam 2756 rotate respectively relative to the two first abutting cams 2770 and have friction resistance, the second abutting cam 2780 rotates with the corresponding first cam 2716 and second cam 2756 and has 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 225 respectively, these friction resistances can position the first rotating member 251 and the second rotating member 256 relative to the base 221, and the first connecting rod member 271 and the second connecting rod member 275 relative to the base 221, so that the electronic device 100 can achieve hovering.

[0077] In other folding modes of the rotating shaft device 22, the second rotating mechanism 255 can be rotated relative to the base 221 toward the first rotating mechanism 250, and the first rotating mechanism 250 and the second rotating mechanism 255 can also be rotated relative to the base 221 in opposite directions at the same time. At this time, the relative motion relationship of each component is similar to that of the above embodiment, so it is not repeated here.

[0078] When the rotating shaft device 22 is unfolded from a completely folded state, the movement process of each component is opposite to that when the rotating shaft device 22 is folded from a flat state, which will not be described in detail herein.

[0079] The rotating shaft 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 member 28 arranged between the first link member 271 and the second link member 275, which is easy to operate; secondly, the friction resistance between the damping member 260 and the first arc rail 2511, the friction resistance between the damping member 260 and the second arc rail 2561, the friction resistance between the two first abutting cams 2770 and the corresponding first cams 2716 and the second cams 2756, and the friction resistance between the two second abutting cams 2780 and the corresponding first cams 2760 and the second cams 2770 and the second ... The friction resistance between the wheel 2716 and the second cam 2756, the friction resistance between the first rotating member 251 and the base 221 and the positioning member 225, and the friction resistance between the second rotating member 256 and the base 221 and the positioning member 225 enable the bendable area 31 of the flexible screen 30 to be positioned at any bending angle to ensure that the hinge device 22 maintains sufficient torque to achieve the opening and closing feel and the hovering effect, so that the two frames 21 can be freely adjusted in the unfolded state, the folded state and the intermediate state, so that the two frames 21 of the electronic device 100 have a hovering function of 0 to 180 degrees.

[0080] The above is an implementation of the embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the embodiment of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A rotating shaft device, characterized in that: The rotating shaft device comprises: Pedestal; A rotating mechanism, the rotating mechanism comprising a rotating member, the rotating member being rotatably connected to the base; a damping member connected to the base, the damping member being in contact with the rotating member; and A push member is used to push the damping member against the rotating member; when the rotating member rotates relative to the base, there is friction resistance between the damping member and the rotating member.

2. The rotating shaft device according to claim 1, characterized in that: The base is provided with a guide hole, the axis of which is parallel to the rotation axis between the rotating member and the base, the damping member is passed through the guide hole, one end of the damping member is connected to the push member, and the other end of the damping member abuts against the rotating member.

3. The rotating shaft device according to claim 2, characterized in that: The base is provided with an arc groove, the rotating member is provided with an arc rail accommodated in the arc groove, the axis of the arc groove is colinear with the rotation axis between the rotating member and the base, the guide hole is connected to the arc groove, and the end of the damping member away from the push member is exposed outside the arc groove.

4. The rotating shaft device according to claim 3, characterized in that: The side surface of the circular arc rail facing the damping member is provided with a damping portion; and / or the end surface of the damping member facing the circular arc rail is provided with an anti-slip portion.

5. The rotating shaft device according to claim 3, characterized in that: The damping member comprises a butting column, the butting column is penetrated through the guide hole, one end of the butting column butts against the circular arc rail, and the other end of the butting column is connected to the push member.

6. The rotating shaft device according to claim 5, characterized in that: The damping member further comprises a stopper and a positioning column, wherein the stopper is arranged at an end of the abutting column away from the circular arc rail, and the stopper is used to stop at the guide hole; The positioning column is arranged at one end of the stopper away from the push column, and the positioning column is connected to the push member.

7. The rotating shaft device according to claim 1, characterized in that: The rotating shaft device also includes a connecting rod and a supporting member, wherein the connecting rod is rotatably connected to the base, and the supporting member is arranged between the connecting rod and the pushing member, and the supporting member and the connecting rod are matched through a cam combination, and the end of the pushing member facing away from the damping member pushes the supporting member against the connecting rod.

8. The rotating shaft device according to claim 7, characterized in that: The rotating mechanism is respectively provided on opposite sides of the base, and the rotating mechanism also includes a connecting member, wherein the connecting member is rotatably connected to an end of the rotating member away from the base, wherein the rotating member of one of the rotating mechanisms is rotatably connected to one side of the base, and the rotating member of the other rotating mechanism is rotatably connected to the other side of the base; the rotating shaft device also includes a pair of connecting shafts and linkage members connected to opposite sides of the base, wherein one of the connecting rod members is connected to one of the connecting shafts, and the other of the connecting rod members is connected to the other connecting shaft, and the end of the connecting rod member away from the base is slidably connected to the corresponding connecting member, and the linkage member is arranged between a pair of the connecting rod members, each of the connecting rod members is connected to the linkage member by a double helical surface group, and when the linkage member moves axially along the connecting shaft relative to the base, the two connecting rod members rotate synchronously in opposite directions relative to the base, and at the same time, the two rotating mechanisms rotate synchronously in opposite directions relative to the base.

9. A foldable housing, characterized in that: The folding shell comprises the hinge device according to any one of claims 1 to 8 and two frames, the hinge device is located between the two frames, and opposite sides of the hinge device are respectively connected to the two frames.

10. An electronic device, characterized in that: The electronic device comprises a flexible screen, two frames and the folding shell as claimed in claim 9, wherein 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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