Folding device, folding shell and electronic equipment

Abstract

The invention provides a folding device which comprises a base, a linkage mechanism and a limiting mechanism, and the linkage mechanism comprises a rotating shaft rotationally connected to the base and a connecting rod piece connected to the rotating shaft; the limiting mechanism comprises an abutting and pushing piece arranged on the connecting rod piece, an abutting and holding piece and an elastic piece, the abutting and pushing piece comprises an abutting cam arranged on the rotating shaft in a sleeving mode, the abutting and holding piece comprises a cam arranged on the rotating shaft in a sleeving mode, the abutting cam can rotate around the axis of the rotating shaft relative to the cam, and the elastic piece is used for abutting and pushing the abutting and holding piece so that the cam can be matched with the abutting cam; the cam comprises a plurality of protruding parts arranged in the circumferential direction of the rotating shaft, the abutting cam comprises a plurality of abutting protruding parts arranged in the circumferential direction of the rotating shaft, the outer contours of at least two of the protruding parts are different, and / or the outer contours of at least two of the abutting protruding parts are different. The invention further provides a folding shell provided with the folding device and electronic equipment.

Description

Technical Field

[0001] The present invention relates to the field of electronic devices, and particularly to a folding device for supporting a flexible screen, a folding housing provided with the folding device, and an electronic device provided with the folding housing. Background Art

[0002] The existing folding electronic products generally include a hinge mechanism, two frames respectively connected to opposite sides of the hinge mechanism, and a flexible screen covering the front of the hinge mechanism and the fronts of the two frames; the two frames are folded or flattened through the hinge mechanism. The torsion mechanism of the hinge mechanism generally relies on a spring pressing member to generate friction during the rotation process, and this friction is used to ensure the stability of the hinge mechanism during the rotation process. During the rotation process of the hinge mechanism, it generally relies on the friction and relative displacement change between cams to achieve the folded state, flattened state, and hovering state of the hinge mechanism. However, the contact surfaces between the cams of the existing hinge mechanism are prone to wear, affecting the hovering effect of the hinge mechanism. Summary of the Invention

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

[0004] A folding device provided by the present application includes a base, a linkage mechanism, and a limiting mechanism. The linkage mechanism includes a rotating shaft and a connecting rod member. The rotating shaft is rotatably connected to the base, and the connecting rod member is connected to the rotating shaft. The limiting mechanism includes a pushing member, a holding member, and an elastic member provided on the connecting rod member. The pushing member includes a pushing cam sleeved on the rotating shaft, the holding member includes a cam sleeved on the rotating shaft, the pushing cam can rotate relative to the cam around the axis of the rotating shaft, and the elastic member is used to push the holding member so that the cam and the pushing cam cooperate with each other. The cam includes a plurality of protruding portions arranged circumferentially around the rotating shaft, the pushing cam includes a plurality of pushing protruding portions arranged circumferentially around the rotating shaft, and the outer contours of at least two of the plurality of protruding portions are different, and / or the outer contours of at least two of the plurality of pushing protruding portions are different.

[0005] The present application also provides a folding housing, which includes a folding device and two frames. The folding device includes a base, a linkage mechanism, and a limiting mechanism. The linkage mechanism includes a rotating shaft and a connecting rod member. The rotating shaft is rotatably connected to the base, and the connecting rod member is connected to the rotating shaft. The limiting mechanism includes a pushing member, a holding member, and an elastic member provided on the connecting rod member. The pushing member includes a pushing cam sleeved on the rotating shaft, and the holding member includes a cam sleeved on the rotating shaft. The pushing cam can rotate relative to the cam around the axis of the rotating shaft. The elastic member is used to push the holding member so that the cam and the pushing cam cooperate with each other. The cam includes a plurality of protruding portions arranged circumferentially around the rotating shaft, and the pushing cam includes a plurality of pushing protruding portions arranged circumferentially around the rotating shaft. At least two of the plurality of protruding portions have different outer contours, and / or at least two of the plurality of pushing protruding portions have different outer contours. The folding device is located between the two frames, and the two frames are respectively connected to the connecting members on the opposite sides of the folding device.

[0006] The present application also provides an electronic device, which includes a flexible screen and a folding housing. The folding housing includes a folding device and two frames. The folding device includes a base, a linkage mechanism, and a limiting mechanism. The linkage mechanism includes a rotating shaft and a connecting rod member. The rotating shaft is rotatably connected to the base, and the connecting rod member is connected to the rotating shaft. The limiting mechanism includes a pushing member, a holding member, and an elastic member provided on the connecting rod member. The pushing member includes a pushing cam sleeved on the rotating shaft, and the holding member includes a cam sleeved on the rotating shaft. The pushing cam can rotate relative to the cam around the axis of the rotating shaft. The elastic member is used to push the holding member so that the cam and the pushing cam cooperate with each other. The cam includes a plurality of protruding portions arranged circumferentially around the rotating shaft, and the pushing cam includes a plurality of pushing protruding portions arranged circumferentially around the rotating shaft. At least two of the plurality of protruding portions have different outer contours, and / or at least two of the plurality of pushing protruding portions have different outer contours. The folding device is located between the two frames, and the two frames are respectively connected to the connecting members on the opposite sides of the folding device. The flexible screen is disposed on the folding housing.

[0007] The abutting cam of the abutting member of the electronic device of the present application includes a plurality of abutting convex portions arranged circumferentially around the rotation axis, and the cam of the abutting member includes a plurality of protruding portions arranged circumferentially around the rotation axis, and the outer contours of at least two of the plurality of protruding portions are different. Therefore, the torsional forces between the at least two protruding portions and the corresponding abutting convex portions are different, which can make the torsional force more balanced when the cam rotates relative to the abutting cam during the unfolding or folding of the folding device, and the torsional force will not be too large, giving the electronic device a better feel during folding or unfolding, making the folding or unfolding of the electronic device smoother, improving the user experience, and also having a better improvement in the wear of the cam surface of the cam and the cam surface of the abutting cam, so that the folding device has a better hovering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the implementation will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

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

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

[0011] Figure 3 is Figure 2 a further schematic exploded perspective view of the electronic device in ;

[0012] Figure 4 is Figure 3 a schematic perspective view of the folding device in ;

[0013] Figure 5 is Figure 4 a schematic perspective view of the folding device in from another perspective;

[0014] Figure 6 is Figure 4 a schematic exploded perspective view of the folding device in ;

[0015] Figure 7 is Figure 5 a schematic exploded perspective view of the folding device in ;

[0016] Figure 8 is Figure 6 a magnified schematic perspective view of one of the auxiliary folding components in ;

[0017] Figure 9 is Figure 8Schematic exploded view of the three-dimensional structure of the folding assistance component therein;

[0018] Figure 10 is Figure 9 Schematic exploded view of the three-dimensional structure of the base and the rotating mechanism therein;

[0019] Figure 11 is Figure 10 Schematic three-dimensional structure view of the base and the rotating mechanism from another perspective therein;

[0020] Figure 12 is Figure 9 Schematic exploded view of the three-dimensional structure of the linkage mechanism and the limiting mechanism therein;

[0021] Figure 13 is Figure 12 Schematic three-dimensional structure view of the linkage mechanism and the limiting mechanism from another perspective therein;

[0022] Figure 14 is Figure 12 Enlarged schematic three-dimensional structure view of the cooperation between the cam and the abutting cam of the two connecting rod members in the folded state therein;

[0023] Figure 15 is Figure 14 Schematic exploded view of the three-dimensional structure of the cam and the abutting cam therein;

[0024] Figure 16 is Figure 15 Further schematic exploded view of the three-dimensional structure of the cam and the abutting cam therein;

[0025] Figure 17 is Figure 14 Side view of one side of the cam and the abutting cam therein;

[0026] Figure 18 is Figure 14 Side view of the other side of the cam and the abutting cam therein;

[0027] Figure 19 is Figure 14 Side view of yet another side of the cam and the abutting cam therein;

[0028] Figure 20 is Figure 12 Enlarged schematic three-dimensional structure view of the cooperation between the cam and the abutting surface cam of the two connecting rod members in the flattened state therein;

[0029] Figure 21 is Figure 20 Side view of one side of the cam and the abutting cam therein;

[0030] Figure 22 is Figure 20 Side view of the other side of the cam and the abutting cam therein;

[0031] Figure 23 is Figure 20 a side view of the cam in against the cam;

[0032] Figure 24 is Figure 8 a perspective cross-sectional view of one of the folding assist components in ;

[0033] Figure 25 is Figure 8 another perspective cross-sectional view of the folding assist components in ;

[0034] Figure 26 is Figure 8 yet another perspective cross-sectional view of the folding assist components in ;

[0035] Figure 27 is Figure 1 a perspective structural diagram of the folded state of the electronic device in ;

[0036] Figure 28 is Figure 27 a perspective structural diagram of the folding device in ;

[0037] Figure 29 is Figure 28 a perspective structural diagram of another view of one of the folding assist components in ;

[0038] Figure 30 is Figure 29 a perspective structural diagram of the linkage mechanism and the limiting mechanism in ;

[0039] Figure 31 is Figure 30 a perspective structural diagram of another view of the linkage mechanism and the limiting mechanism in ;

[0040] Figure 32 is Figure 29 a perspective cross-sectional view of one of the folding assist components in ;

[0041] Figure 33 is Figure 29 another perspective cross-sectional view of the folding assist components in ;

[0042] Figure 34 is Figure 29 yet another perspective cross-sectional view of the folding assist components in .

[0043] Main reference numeral description:

[0044] 100, Electronic device; 20, Folding housing; 21, Frame; 211, First front face; 212, First back face; 214, Side face; 215, End face; 216, Mounting groove; 217, Mounting part; 30, Flexible screen; 31, Bendable area; 33, Non-bendable area; 50, Folding device; 51, Folding assist component; 52, Support mechanism; 521, Middle support member; 5212, Connection hole; 523, Side support member; 5230, Support plate; 5232, Connection area; 5233, First connection part; 5234, Rotation groove; 5236, Second connection part; 5237, Adjustment groove; 5237a, First positioning section; 5237b, Second positioning section; 53, Base; 530, Receiving groove; 531, First housing; 5312, Positioning post; 532, Arc groove; 5314, First receiving groove; 533, Mounting hole; 534, Second housing; 5342, Positioning hole; 5344, Second receiving groove; 535, First shaft hole; 536, Connection hole; 537, Fixing hole; 55, Rotation mechanism; 550, Rotating part; 551, Rotating shaft; 552, First rotating part; 5522, Arc track; 553, Second rotating part; 5531, Lug; 5533, First connection cylinder; 555, Connecting part; 5550, Guide sliding groove; 5552, Receiving groove; 5553, Second connection cylinder; 5554, Avoidance groove; 5556, Rotation track; 56, Linkage mechanism; 561, Rotation shaft; 5610, Shaft body; 5612, Connection cap; 5613, First positioning part; 5614, Second positioning part; 5616, Card slot; 562, Link member; 5620, Guide sliding rail; 5621, Avoidance groove; 5622, Sleeve; 5623, Link; 5624, Second shaft hole; 5626, First limiting surface; 5627, Second limiting surface; 5628, First adjustment shaft; 564, Gear combination; 5641, Driving gear; 5643, Synchronous gear; 5644, Rotating shaft; 5646, Gear ring; 565, Fixing part; 5652, First guide sliding hole; 5654, First connection hole; 5656, Positioning part; 5657, Positioning rod; 57, Limiting mechanism; 572, Pushing part; 5720, Pushing cam; 5721, First pushing convex part; 5721a, First pushing surface; 5721b, First inclined surface; 5721c, First guide sliding surface; 5724, Second pushing convex part; 5724a, Second pushing surface; 5724b, Second inclined surface; 5724c, Second guide sliding surface; 5725, Second receiving groove; 5727, Third pushing convex part; 5727a, Third pushing surface; 5727b, Third inclined surface; 5727c, Third guide sliding surface; 5728, Positioning part; 5728a, First positioning block; 5728b, Second positioning block; 5729, Second through hole; 573, Holding part; 5730, First sliding cylinder; 5732, Connection strip; 5736, Second connection hole; 574, Cam; 5741, First protruding part;5741a, the first climbing surface; 5741b, the first descending surface; 5741c, the first connecting surface; 5744, the second protruding part; 5744a, the second climbing surface; 5744b, the second descending surface; 5744c, the second connecting surface; 5745, the first receiving groove; 5747, the third protruding part; 5747a, the third climbing surface; 5747b, the third descending surface; 5747c, the third connecting surface; 5748, the connecting part; 5748a, the first connecting block; 5748b, the second connecting block; 5749, the first through hole; 575, the elastic part; 576, the positioning part; 5760, the second sliding cylinder; 5763, the positioning block; 5765, the second guiding and sliding hole; 5767, the avoidance hole; 5768, the first anti-sliding part; 577, the friction assembly; 5770, the first friction part; 5772, the first positioning hole; 5774, the second anti-sliding part; 5775, the second friction part; 5776, the second positioning hole; 5778, the fourth anti-sliding part; 578, the gasket; 5782, the sliding hole; 5784, the third anti-sliding part; 579, the buckle; 59, the back shell; 590, the back plate; 592, the locking part; 594, the connecting column; 5942, the locking hole; 595, the side plate.; Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] In addition, the descriptions of the following embodiments refer to the attached drawings for illustration of specific embodiments in which the present application can be implemented. The directional terms mentioned in the present application, for example, "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are only the directions with reference to the attached drawings. Therefore, the directional terms used are for better and clearer description 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 thus cannot be construed as a limitation to the present application.

[0047] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "set on..." should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside 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 specific situations.

[0048] Please refer to Figures 1 to 9 , an electronic device 100 in an embodiment of the present invention includes a folding housing 20 and a flexible screen 30. The flexible screen 30 is disposed on the folding housing 20. The folding housing 20 includes two frame bodies 21 and a folding device 50. The folding device 50 is located between the two frame bodies 21. Opposite sides of the folding device 50 are respectively connected to the two frame bodies 21. The flexible screen 30 is disposed on the fronts of the two frame bodies 21 and the front of the folding device 50. The flexible screen 30 includes a bendable area 31 facing the folding device 50, and two non-bendable areas 33 connected to opposite sides of the bendable area 31. The two non-bendable areas 33 are respectively connected to the fronts of the two frame bodies 21. The folding device 50 is used to support the bendable area 31 of the flexible screen 30, and the bendable area 31 can be folded or flattened along with the folding device 50. The folding device 50 includes a folding assist assembly 51, a support mechanism 52, and a back shell 59. The folding assist assembly 51 includes a base 53, a rotating mechanism 55, a linkage mechanism 56, and a limiting mechanism 57. The base 53 is positioned on the front of the back shell 59. The rotating mechanism 55 includes a rotating member 550 and a connecting member 555 rotatably connected to the rotating member 550. One end of the rotating member 550 away from the connecting member 555 is rotatably connected to the base 53. The linkage mechanism 56 includes a rotating shaft 561 and a connecting rod member 562. The rotating shaft 561 is rotatably connected to the base 53. The connecting rod member 562 is connected to the rotating shaft 561. The limiting mechanism 57 includes a pushing member 572, a holding member 573, and an elastic member 575 disposed on the connecting rod member 562. The pushing member 572 includes a pushing cam 5720 sleeved on the rotating shaft 561. The holding member 573 includes a cam 574 slidably sleeved on the rotating shaft 561. The pushing cam 5720 can rotate relative to the cam 574 around the axis of the rotating shaft 561. The elastic member 575 has an elastic force for making the cam 574 and the cam 574 abut and cooperate with each other. Specifically, the elastic member 575 is used to push the holding member 573 so that the cam 574 and the pushing cam 5720 abut and cooperate with each other. Among them, the cam 574 includes a plurality of protruding portions arranged circumferentially around the rotating shaft 561. The pushing cam 5720 includes a plurality of pushing convex portions arranged circumferentially around the rotating shaft 561. The outer contours of at least two of the plurality of protruding portions are different, and / or the outer contours of at least two of the plurality of pushing convex portions are different.

[0049] It should be noted that the front side refers to the side with the same light-emitting surface orientation as the flexible screen 30, the back side refers to the side with the opposite light-emitting surface orientation of the flexible screen 30, and the specific angle refers to the angle between the front sides of the two frames 21 within the range of 0 degrees to 180 degrees. The electronic device 100 is, for example, but not limited to, mobile phones, tablet computers, displays, liquid crystal panels, OLED panels, televisions, smart watches, VR head-mounted displays, in-vehicle displays, and other products and components with display functions. The "connection" in the description of the embodiments of the present invention includes both 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 cases of integrated connection and non-integrated connection. The integrated connection means that A and B are integrally formed and connected, and the non-integrated connection means that A and B are non-integrally formed and connected.

[0050] The abutting cam 5720 of the abutting member 572 of the folding device 50 of the electronic device 100 of the present invention includes a plurality of abutting protrusions arranged circumferentially around the rotation axis 561. The cam 574 of the abutting member 573 includes a plurality of protruding parts arranged circumferentially around the rotation axis 561, and the outer contours of at least two of the plurality of protruding parts are different. Therefore, the torsional forces between the at least two protruding parts and the corresponding abutting protrusions are different, enabling the folding device 50 to have a more balanced torsional force when unfolding or folding, so that the torsional force will not be too large when the cam 574 rotates relative to the abutting cam 5720, making the electronic device 100 have a better folding or unfolding feel, making the folding or unfolding of the electronic device 100 smoother, improving the user experience, and having a better improvement in the wear of the cam surface of the cam 574 and the cam surface of the abutting cam 5720, so that the folding device 50 has a better hovering effect.

[0051] As Figure 2 and Figure 3 As shown, the frame 21 includes a first front side 211, a first back side 212, opposite side surfaces 214, and opposite end surfaces 215. An installation groove 216 is provided on one side of the first front side 211 close to the folding device 50. The opposite ends of the installation groove 216 respectively extend close to the two side surfaces 214, and one side of the installation groove 216 penetrates through the end surface 215 facing the folding device 50; installation parts 217 are respectively provided at the opposite ends of the installation groove 216 of the frame 21. Electronic devices such as circuit boards and batteries are provided inside the frame 21, and the electronic devices in the two frames 21 are connected to each other through flexible circuit boards.

[0052] As Figure 6 and Figure 7As shown, rotating mechanisms 55 are respectively provided on two opposite sides of the base 53. One end of the rotating member 550 of one rotating mechanism 55, which is away from the connecting member 555, is rotatably connected to one side of the base 53, and one end of the rotating member 550 of the other rotating mechanism 55, which is away from the connecting member 555, is rotatably connected to the opposite side of the base 53. The support mechanism 52 includes a middle support member 521 and two side support members 523 located on two opposite sides of the middle support member 521. The middle support member 521 is connected to the base 53. One side support member 523 is movably connected to the rotating mechanism 55 and the linkage mechanism 56 on one side of the base 53, and the other side support member 523 is movably connected to the rotating mechanism 55 and the linkage mechanism 56 on the opposite side of the base 53. The two side support members 523 can rotate synchronously relative to the middle support member 521 through the rotating mechanism 55 and the linkage mechanism 56. The middle support member 521 is a strip-shaped connecting piece. Connecting holes 5212 are respectively provided at two opposite ends of the front surface of the connecting piece. The locking member passes through the connecting holes 5212 and is connected to the folding assistance component 51, so that the middle support member 521 is connected to the back shell 59. The back surface of the flexible screen 30 is attached to the front surface of the middle support member 521 and the front surface of the side support member 523. The side rotating mechanism 55 on one side of the back shell 59 rotates relative to the base 53, and drives the side support member 523 on the other side to rotate synchronously relative to the base 53 through the linkage mechanism 56, so as to realize the synchronous unfolding or synchronous bending of the support mechanism 52, and complete the synchronous folding or synchronous unfolding of the folding device 50. The back shell 59 is a rectangular frame, which includes a rectangular back plate 590, two side plates 595, and two end plates. The two side plates 595 are provided on two opposite sides of the back plate 590, and the two end plates are provided at two opposite ends of the back plate 590. The back plate 590 and the two side plates 595 enclose a positioning space for receiving the base 53. Locking portions 592 are respectively provided at two opposite ends of the front surface of the back shell 59. The bases 53 of the two folding assistance components 51 are respectively connected to the two locking portions 592 of the back shell 59. The locking portion 592 includes a plurality of connecting columns 594, and a locking hole 5942 is axially provided in each connecting column 594.

[0053] Each side support member 523 includes a rectangular support plate 5230 and a connection area 5232 provided on the back surface of the support plate 5230. In this embodiment, connection areas 5232 are respectively provided at opposite ends of the back surface of the support plate 5230, and the connection areas 5232 are used to connect the corresponding rotation mechanisms 55. Each connection area 5232 includes a pair of first connection portions 5233 and a second connection portion 5236. The pair of first connection portions 5233 are spaced apart from each other, and the second connection portion 5236 is located between the pair of first connection portions 5233. Each first connection portion 5233 is provided with an arc-shaped rotation groove 5234. The axes of the pair of rotation grooves 5234 are collinear, and the rotation groove 5234 is located at the end of the first connection portion 5233 away from the middle support member 521. An arc-shaped adjustment groove 5237 is provided on the second connection portion 5236, and the middle of the adjustment groove 5237 is bent toward the side away from the hinge body. The adjustment groove 5237 includes a first positioning section 5237a and a second positioning section 5237b at its opposite ends. The first positioning section 5237a is closer to the middle support member 521 than the second positioning section 5237b. In this embodiment, folding assistance components 51 are respectively provided at opposite ends of the back surface of the support mechanism 52. In other embodiments, more than three folding assistance components 51 are provided on the back surface of the support mechanism 52, and the more than three folding assistance components 51 are arranged along the length direction of the support mechanism 52; only one folding assistance component 51 may also be provided on the back surface of the support mechanism 52, and the one folding assistance component 51 is located in the middle of the support mechanism 52.

[0054] Please refer to Figures 8 - 11, the rotating member 550 includes a first rotating portion 552 and a second rotating portion 553 respectively located at its opposite ends. The first rotating portion 552 is rotatably connected to the base 53 through the cooperation of an arc rail and an arc groove. The arc rail is provided on one of the base 53 and the first rotating portion 552, and the arc groove is provided on the other of the base 53 and the first rotating portion 552. The axis of the arc groove is parallel to the axis of the rotating shaft 561. In this embodiment, receiving grooves 530 are respectively provided on the opposite sides of the front surface of the base 53. The first rotating portion 552 of one rotating member 550 is rotatably received in one of the receiving grooves 530, and the first rotating portion 552 of the other rotating member 550 is rotatably received in the other receiving groove 530. Arc grooves 532 are respectively provided on the two inner end faces of each receiving groove 530 of the base 53. The two arc grooves 532 are coaxial. The opposite ends of each arc groove 532 respectively penetrate through the front surface of the base 53. Arc rails 5522 are respectively provided on the opposite end faces of the first rotating portion 552. The two arc rails 5522 are coaxial. When the first rotating portion 552 is received in the corresponding receiving groove 530, the two arc rails 5522 are respectively rotatably received in the two arc grooves 532. The second rotating portion 553 is rotatably connected to the connecting member 555 through a rotating shaft 551. The axis of the rotating shaft 551 is parallel to the axis of the rotating shaft 561. In this embodiment, the elastic member 575 is a spring sleeved on each rotating shaft 561.

[0055] The base 53 includes a first body 531 and a second body 534 which are connected to each other. In this embodiment, the first body 531 and the second body 534 are snap-fitted through the cooperation of a positioning post and a positioning hole. The positioning hole is provided in one of the first body 531 and the second body 534, and the positioning post is provided in the other of the first body 531 and the second body 534. Specifically, a positioning post 5312 is provided on the side of the first body 531 facing the second body 534, and a positioning hole 5342 is provided on the side of the second body 534 facing the first body 531. The positioning post 5312 is positioned in the positioning hole 5342 to fixedly connect the first body 531 and the second body 534. At opposite ends of the front side of the first body 531 near the second body 534, first receiving grooves 5314 are respectively provided. At opposite ends of the front side of the second body 534 near the first body 531, second receiving grooves 5344 are respectively provided. When the first body 531 is fixedly connected to the second body 534, the first receiving groove 5314 and the second receiving groove 5344 on the same side of the base 53 enclose a receiving groove 530. An arc groove 532 is provided at the end face of each first receiving groove 5314 of the first body 531, and the axes of the two arc grooves 532 are spaced and parallel. An arc groove 532 is provided at the end face of each second receiving groove 5344 of the second body 534, and the axes of the two arc grooves 532 are spaced and parallel. Mounting holes 533 are provided on the front surface of the base 53. After the locking member passes through the mounting holes 533, it is locked to the back shell 59 to fixedly connect the base 53 to the back shell 59. Two first shaft holes 535, two connection holes 536 and a fixing hole 537 are provided on the end face of the second body 534 facing away from the first body 531. The two first shaft holes 535 are located on opposite sides of the base 53. The two connection holes 536 are located between the two first shaft holes 535. The fixing hole 537 is located between the two connection holes 536. The axes of the two first shaft holes 535 and the two connection holes 536 are parallel to the rotation axis between the rotating member 550 and the base 53.

[0056] In other embodiments, arc tracks are respectively provided on opposite end faces of the receiving groove 530 of the base 53, and the two arc tracks are coaxial. Arc grooves are respectively provided on opposite sides of the first rotating portion 552, and the two arc grooves are coaxial. When the first rotating portion 552 is received in the corresponding receiving groove 530, the two arc tracks are respectively rotatably received in the two arc grooves.

[0057] The second rotating part 553 is rotatably connected to the first end of the connecting part 555 through a rotating shaft 551. A lug 5531 is provided at one end of the second rotating part 553 facing away from the first rotating part 552. A receiving groove 5552 is provided at the first end on the front surface of the connecting part 555. The lug 5531 is rotatably received in the receiving groove 5552. The rotating part 550 further includes a first connecting cylinder 5533 connected to one end of the lug 5531 facing away from the first rotating part 552. The connecting part 555 includes a second connecting cylinder 5553 provided at the first end of the connecting part 555. The receiving groove 5552 penetrates the inner cavity of the second connecting cylinder 5553 along the radial direction of the second connecting cylinder 5553. The first connecting cylinder 5533 and the second connecting cylinder 5553 are mutually embedded so that the first connecting cylinder 5533 and the second connecting cylinder 5553 are coaxial. The rotating shaft 551 penetrates the inner cavities of the first connecting cylinder 5533 and the second connecting cylinder 5553.

[0058] Such as Figures 6 - 9 And Figures 12 - 13As shown in the figure, the linkage mechanism 56 includes two rotating shafts 561 that are spaced apart and parallel, two connecting rod members 562, and a gear combination 564. One of the connecting rod members 562 is connected to one of the rotating shafts 561, and the other connecting rod member 562 is connected to the other rotating shaft 561. The gear combination 564 is disposed between the two connecting rod members 562, and the two connecting rod members 562 can rotate synchronously through the gear combination 564. Each connecting rod member 562 is provided with a pushing member 572, and the pushing member 572 can rotate around the axis of the corresponding rotating shaft 561 along with the corresponding connecting rod member 562. The holding member 573 further includes a connecting strip 5732. Cam members 574 are respectively provided at the opposite ends of the side of the connecting strip 5732 facing the linkage mechanism 56, and the two cam members 574 cooperate with the two abutting cam members 5720 respectively. The gear combination 564 includes a driving gear 5641 and synchronous gears 5643 that mesh with each other. A driving gear 5641 is provided on each connecting rod member 562, and each driving gear 5641 meshes with the corresponding synchronous gear 5643. The two connecting rod members 562 can rotate synchronously through the gear combination 564 to drive the two rotating shafts 561 to rotate synchronously. The end of the connecting rod member 562 far from the base 53 and the end of the corresponding connecting member 555 far from the rotating member 550 are slidably connected through the cooperation of a guide chute and a guide rail. The guide chute is provided on one of the connecting rod member 562 and the corresponding connecting member 555, and the guide rail is provided on the other of the connecting rod member 562 and the corresponding connecting member 555. The guide chute extends along the axial direction perpendicular to the rotating shaft 561. In this embodiment, a guide chute 5550 is formed on the connecting member 555, and a guide rail 5620 is provided at the end of the connecting rod member 562 far from the base 53. The guide rail 5620 slidably penetrates through the guide chute 5550. Specifically, a clearance groove 5554 is provided at the second end of the front surface of the connecting member 555 far from the rotating member 550, and guide chutes 5550 are respectively provided on the opposite side surfaces of the connecting member 555 in the clearance groove 5554. Rotating rails 5556 are respectively provided at the opposite ends of the connecting member 555, and the two rotating rails 5556 are respectively rotatably received in the two rotating grooves 5234, so that the side support member 523 is rotatably connected to the connecting member 555.

[0059] In other embodiments, the guide rail 5620 on the connecting rod member 562 and the guide chute 5550 on the connecting member 555 can be interchanged. Specifically, guide rails are respectively provided on the opposite side surfaces of the connecting member 555 in the clearance groove 5554, and guide chutes are respectively provided on the opposite sides of the end of the connecting rod member 562 far from the base 53. In other embodiments, the rotating rail 5556 on the connecting member 555 and the rotating groove 5234 on the side support member 523 can be interchanged. Specifically, rotating grooves are respectively provided at the opposite ends of the connecting member 555, and the side support member 523 is provided with rotating rails corresponding to the rotating grooves of the connecting member 555. The rotating rails are rotatably received in the corresponding rotating grooves, so that the side support member 523 is rotatably connected to the connecting member 555.

[0060] The rotating shaft 561 includes a shaft body 5610 and a connecting cap 5612 located at one end of the shaft body 5610. A first positioning portion 5613 is provided at the shaft body 5610 near the connecting cap 5612, and a second positioning portion 5614 is provided at one end of the shaft body 5610 away from the connecting cap 5612. One rotating shaft 561 is fixedly connected to one of the connecting rods 562 through its first positioning portion 5613, and the other rotating shaft 561 is fixedly connected to the other connecting rod 562 through its first positioning portion 5613. Specifically, the first positioning portion 5613 is a positioning groove provided on the outer wall of the shaft body 5610, and the length direction of the positioning groove is parallel to the axial direction of the shaft body 5610; the second positioning portion 5614 is a positioning surface provided on the outer peripheral surface of the shaft body 5610, and the positioning surface is parallel to the axial direction of the shaft body 5610. The connecting cap 5612 is a cylindrical block, which is used to be rotatably connected to the base 53. A slot 5616 is provided at the end of the shaft body 5610 away from the connecting cap 5612 . The slot 5616 is located on the outer peripheral wall of the shaft body 5610 and surrounds the shaft body 5610 in a circle.

[0061] The connecting rod 562 further comprises a sleeve 5622 and a connecting rod 5623, wherein the connecting rod 5623 is connected to the outer peripheral wall of the sleeve 5622, and the sleeve 5622 can be sleeved on the first positioning portion 5613 of the shaft body 5610. Specifically, the sleeve 5622 has a non-circular second shaft hole 5624, and after the rotating shaft 561 is inserted into the second shaft hole 5624 of the sleeve 5622, the sleeve 5622 can be positioned on the first positioning portion 5613, and the sleeve 5622 and the rotating shaft 561 can rotate together around the axis of the rotating shaft 561. The driving gear 5641 is arranged on the outer peripheral wall of the sleeve 5622, and the driving gear 5641 is located on the side of the sleeve 5622 away from the connecting rod 5623, and the axis of the driving gear 5641 is colinear with the axis of the sleeve 5622. An escape groove 5621 is provided at one end of the connecting rod 5623 away from the sleeve 5622, and a first adjustment shaft 5628 is provided on one inner side of the escape groove 5621, and the axis of the first adjustment shaft 5628 is parallel to the axis of the sleeve 5622. Two guide rails 5620 are respectively provided on opposite sides of the connecting rod 5623, and the guide rails 5620 extend along the length direction of the connecting rod 5623. A push member 572 is provided at one end of the sleeve 5622 facing the support member 573, and the push member 572 is arranged around the second shaft hole 5624.

[0062] The synchronous gear 5643 includes a rotating shaft 5644 and a gear ring 5646 fixedly sleeved on the rotating shaft 5644, and opposite ends of the rotating shaft 5644 extend from opposite ends of the gear ring 5646. In this embodiment, the gear assembly 564 includes a pair of mutually meshing synchronous gears 5643, wherein one synchronous gear 5643 is meshed with one of the driving gears 5641, and the other synchronous gear 5643 is meshed with the other driving gear 5641.

[0063] The linkage mechanism 56 further includes a fixing member 565 connected to one end of each of the two rotating shafts 561. The fixing member 565 is a rectangular positioning piece. Opposite ends of the fixing member 565 are respectively provided with first guiding sliding holes 5652. The shaft bodies 5610 of the two rotating shafts 561 are respectively inserted through the two first guiding sliding holes 5652. One of the rotating shafts 561 can rotate in the first guiding sliding hole 5652, and the other rotating shaft 561 can rotate in the other first guiding sliding hole 5652. The fixing member 565 can only slide axially along the two rotating shafts 561. Two spaced first connection holes 5654 are provided in the middle of the fixing member 565. The two first connection holes 5654 are located between the two first guiding sliding holes 5652. The axis of the first guiding sliding hole 5652 is parallel to the axis of the first connection hole 5654. A positioning portion 5656 is provided on the side of the fixing member 565 facing the link member 562. The link member 562 includes a first limiting surface 5626 and a second limiting surface 5627; when the two link members 562 are in a folded state relative to the base 53, the positioning portion 5656 abuts against the first limiting surface 5626; when the two link members 562 are in a flattened state relative to the base 53, the positioning portion 5656 abuts against the second limiting surface 5627. Specifically, a notch is provided around the second shaft hole 5624 at the end of the sleeve 5622 facing away from the pushing member 572. The first limiting surface 5626 and the second limiting surface 5627 are respectively the two opposite end faces of the notch. The first limiting surface 5626 is farther from the guide rail 5620 than the second limiting surface 5627. A positioning rod 5657 is provided on the side of the fixing member 565 facing away from the positioning portion 5656. The positioning rod 5657 is used for positioning on the base 53.

[0064] Such as Figures 12 - 19As shown, the abutting member 573 includes two first sliding cylinders 5730 spaced apart from each other, a connecting bar 5732, and a cam 574. The two first sliding cylinders 5730 are respectively connected to opposite ends of the connecting bar 5732, and the axes of the two first sliding cylinders 5730 are spaced and parallel. The cam 574 is disposed on the side of the first sliding cylinder 5730 facing the link member 562, and the cam 574 is coaxial with the first sliding cylinder 5730. In this embodiment, cams 574 are respectively disposed on the sides of the two first sliding cylinders 5730 facing the link member 562, the two cams 574 are respectively coaxial with the two first sliding cylinders 5730, and a plurality of protruding portions of each cam 574 are arranged circumferentially around the corresponding first sliding cylinder 5730. In this embodiment, the plurality of protruding portions include a first protruding portion 5741, a second protruding portion 5744, and a third protruding portion 5747 arranged circumferentially and spaced apart from each other around the first sliding cylinder 5730. The first protruding portion 5741 includes a first climbing surface 5741a on one side thereof, the second protruding portion 5744 includes a second climbing surface 5744a on one side thereof, the third protruding portion 5747 includes a third climbing surface 5747a on one side thereof, and the plurality of abutting convex portions include a first abutting convex portion 5721, a second abutting convex portion 5724, and a third abutting convex portion 5727 arranged circumferentially and spaced apart from each other around the sleeve 5622. When the folding device is in the folded state, the first abutting convex portion 5721 abuts against the first climbing surface 5741a, the second abutting convex portion 5724 abuts against the second climbing surface 5744a, and the third abutting convex portion 5727 abuts against the third climbing surface 5747a. The tangent plane between the first abutting convex portion 5721 and the first climbing surface 5741a forms a first climbing angle θ1 with the radial direction of the rotating shaft 561. The tangent plane between the second abutting convex portion 5724 and the second climbing surface 5744a forms a second climbing angle θ2 with the radial direction of the rotating shaft 561. The tangent plane between the third abutting convex portion 5727 and the third climbing surface 5747a forms a third climbing angle θ3 with the radial direction of the rotating shaft 561. The first climbing angle θ1 is less than the second climbing angle θ2, the third climbing angle θ3 is different from the first climbing angle θ1. Preferably, the third climbing angle θ3 is greater than the first climbing angle θ1 and less than 90 degrees. The third climbing angle θ3 is different from the second climbing angle θ2. Preferably, the third climbing angle θ3 is greater than the second climbing angle θ2 and less than 90 degrees. Optionally, the first climbing surface 5741a, the second climbing surface 5744a, and the third climbing surface 5747a are respectively inclined surfaces or arc surfaces. Preferably, the range of the first climbing angle θ1 is 40 degrees - 80 degrees, that is, the first climbing angle θ1 can be but is not limited to any angle value among 40 degrees, any angle value between 40 degrees and 80 degrees, and 80 degrees, and the second climbing angle θ2 is greater than the first climbing angle θ1 and less than 90 degrees.

[0065] As Figures 12 - 13 and Figures 20 - 23As shown, the first protruding portion 5741 further includes a first descending surface 5741b facing away from the first climbing surface 5741a, that is, the first climbing surface 5741a and the first descending surface 5741b are respectively located on opposite sides of the first protruding portion 5741; the second protruding portion 5744 further includes a second descending surface 5744b facing away from the second climbing surface 5744a, that is, the second climbing surface 5744a and the second descending surface 5744b are respectively located on opposite sides of the second protruding portion 5744; the third protruding portion 5747 further includes a third descending surface 5747b facing away from the third climbing surface 5747a, that is, the third climbing surface 5747a and the third descending surface 5747b are respectively located on opposite sides of the third protruding portion 5747; when the folding device 50 is in a flattened state, the first abutting convex portion 5721 abuts against the first descending surface 5741b, the second abutting convex portion 5724 abuts against the second descending surface 5744b, the third protruding portion 5747 abuts against the third descending surface 5747b, the tangent plane between the first abutting convex portion 5721 and the first descending surface 5741b forms a first descending angle β1 with the radial direction of the rotation axis 561, the tangent plane between the second abutting convex portion 5724 and the second descending surface 5744b forms a second descending angle β2 with the radial direction of the rotation axis 561, the tangent plane between the third abutting convex portion 5727 and the third descending surface 5747b forms a third descending angle β3 with the radial direction of the rotation axis 561, and the first descending angle β1 is less than the second descending angle β2; the third descending angle β3 is different from the first descending angle β1. Preferably, the third descending angle β3 is greater than the first descending angle β1 and less than 90 degrees; the third descending angle β3 is different from the second descending angle β2. Preferably, the third descending angle β3 is greater than the second descending angle β2 and less than 90 degrees. Optionally, the first descending surface 5741b and the second descending angle β2 are respectively an inclined surface or an arc surface. Preferably, the range of the first descending angle β1 is 45 degrees - 80 degrees, that is, the first descending angle β1 can be but is not limited to any angle value between 45 degrees, 45 degrees - 80 degrees, and 80 degrees, and the second descending angle β2 is greater than the first descending angle β1 and less than 90 degrees.

[0066] Optionally, the first protruding portion 5741 further includes a first connecting surface 5741c connected between the first climbing surface 5741a and the first descending surface 5741b, the second protruding portion 5744 further includes a second connecting surface 5744c connected between the second climbing surface 5744a and the second descending surface 5744b, and the third protruding portion 5747 further includes a third connecting surface 5747c connected between the third climbing surface 5747a and the third descending surface 5747b. In this embodiment, the length of the first connecting surface 5741c in the circumferential direction of the rotation axis 561 is less than the length of the second connecting surface 5744c in the circumferential direction of the rotation axis 561, and the length of the third connecting surface 5747c in the circumferential direction of the rotation axis 561 is greater than the length of the first connecting surface 5741c in the circumferential direction of the rotation axis 561. When the folding device 50 is in a hovering state, the first abutting convex portion 5721 abuts against the first connecting surface 5741c, the second abutting convex portion 5724 abuts against the second connecting surface 5744c, and the third abutting convex portion 5727 abuts against the third connecting surface 5747c.

[0067] In other embodiments, the length of the first connecting surface 5741c in the circumferential direction of the rotation axis 561 may also be greater than or equal to the length of the second connecting surface 5744c in the circumferential direction of the rotation axis 561, the length of the first connecting surface 5741c in the circumferential direction of the rotation axis 561 may also be greater than or equal to the length of the third connecting surface 5747c in the circumferential direction of the rotation axis 561, and the length of the second connecting surface 5744c in the circumferential direction of the rotation axis 561 and the length of the third connecting surface 5747c in the circumferential direction of the rotation axis 561 may be the same or different. Optionally, the first connecting surface 5741c, the second connecting surface 5744c, and the third connecting surface 5747c are all arc-shaped surfaces or inclined surfaces.

[0068] Optionally, during the process of the folding device 50 changing from the folded state to the flattened state, the cam 574 rotates relative to the pushing member 572 about the axis of the rotation axis 561. The first abutting convex portion 5721 slides from the first climbing surface 5741a through the first connecting surface 5741c to the first descending surface 5741b, the second abutting convex portion 5724 slides from the second climbing surface 5744a through the second connecting surface 5744c to the second descending surface 5744b, and the third abutting convex portion 5727 slides from the third climbing surface 5747a through the third connecting surface 5747c to the third descending surface 5747b. During the process of the folding device 50 changing from the flattened state to the folded state, the cam 574 rotates relative to the pushing member 572 about the axis of the rotation axis 561. The first abutting convex portion 5721 slides from the first descending surface 5741b through the first connecting surface 5741c to the first climbing surface 5741a, the second abutting convex portion 5724 slides from the second descending surface 5744b through the second connecting surface 5744c to the second climbing surface 5744a, and the third abutting convex portion 5727 slides from the third descending surface 5747b through the third connecting surface 5747c to the third climbing surface 5747a.

[0069] Between the first protruding portion 5741 and the second protruding portion 5744 of the cam 574, between the second protruding portion 5744 and the third protruding portion 5747, and between the third protruding portion 5747 and the first protruding portion 5741, there are respectively first receiving grooves 5745; the first abutting convex portion 5721, the second abutting convex portion 5724, and the third abutting convex portion 5727 can be respectively received in the three first receiving grooves 5745. Between the first abutting convex portion 5721 and the second abutting convex portion 5724 of the pushing member 572, between the second abutting convex portion 5724 and the third abutting convex portion 5727, and between the first abutting convex portion 5721 and the third abutting convex portion 5727, there are respectively second receiving grooves 5725; the first protruding portion 5741, the second protruding portion 5744, and the third protruding portion 5747 can be respectively received in the three second receiving grooves 5725.

[0070] The outer contours of the first abutting convex part 5721, the second abutting convex part 5724 and the third abutting convex part 5727 may be the same or different. In this embodiment, the outer contours of the first abutting convex part 5721, the second abutting convex part 5724 and the third abutting convex part 5727 are the same. The first abutting convex part 5721 includes a first abutting surface 5721a and a first inclined surface 5721b respectively located on its opposite sides. The second abutting convex part 5724 includes a second abutting surface 5724a and a second inclined surface 5724b respectively located on its opposite sides. The third abutting convex part 5727 includes a third abutting surface 5727a and a third inclined surface 5727b respectively located on its opposite sides. When the folding device 50 is in the folded state, the first climbing surface 5741a of the first protruding part 5741 abuts against the first abutting surface 5721a, the second climbing surface 5744a of the second protruding part 5744 abuts against the second abutting surface 5724a, and the third climbing surface 5747a of the third protruding part 5747 abuts against the third abutting surface 5727a. When the folding device 50 is in the flattened state, the first descending surface 5741b of the first protruding part 5741 abuts against the first inclined surface 5721b, the second descending surface 5744b of the second protruding part 5744 abuts against the second inclined surface 5724b, and the third descending surface 5747b of the third protruding part 5747 abuts against the third inclined surface 5727b. The angles between the first abutting surface 5721a and the axial direction of the rotating shaft 561, the angle between the second abutting surface 5724a and the axial direction of the rotating shaft 561, and the angle between the third abutting surface 5727a and the axial direction of the rotating shaft 561 are the same. The angles between the first inclined surface 5721b and the axial direction of the rotating shaft 561, the angle between the second inclined surface 5724b and the axial direction of the rotating shaft 561, and the angle between the third inclined surface 5727b and the axial direction of the rotating shaft 561 are the same. The first abutting convex part 5721 further includes a first guiding sliding surface 5721c connecting the first abutting surface 5721a and the first inclined surface 5721b. The second abutting convex part 5724 further includes a second guiding sliding surface 5724c connecting the second abutting surface 5724a and the second inclined surface 5724b. The third abutting convex part 5727 further includes a third guiding sliding surface 5727c connecting the third abutting surface 5727a and the third inclined surface 5727b. The first guiding sliding surface 5721c, the second guiding sliding surface 5724c and the third guiding sliding surface 5727c may be arc surfaces or inclined surfaces. When the folding device 50 is in the hovering state, the first connecting surface 5741c of the first protruding part 5741 abuts against the first guiding sliding surface 5721c, the second connecting surface 5744c of the second protruding part 5744 abuts against the second guiding sliding surface 5724c, and the third connecting surface 5747c of the third protruding part 5747 abuts against the third guiding sliding surface 5727c.During the process of the folding device 50 changing from the folded state to the flattened state, the first protruding portion 5741 slides from the first abutting surface 5721a along the first guiding surface 5721c to the first inclined surface 5721b, the second protruding portion 5744 slides from the second abutting surface 5724a along the second guiding surface 5724c to the second inclined surface 5724b, and the third protruding portion 5747 slides from the third abutting surface 5727a along the third guiding surface 5727c to the third inclined surface 5727b. During the process of the folding device 50 changing from the flattened state to the folded state, the first protruding portion 5741 slides from the first inclined surface 5721b along the first guiding surface 5721c to the first abutting surface 5721a, the second protruding portion 5744 slides from the second inclined surface 5724b along the second guiding surface 5724c to the second abutting surface 5724a, and the third protruding portion 5747 slides from the third inclined surface 5727b along the third guiding surface 5727c to the third abutting surface 5727a.

[0071] In other embodiments, the outer contours of the first abutting convex portion 5721, the second abutting convex portion 5724, and the third abutting convex portion 5727 are different; the angles between the first abutting surface 5721a and the axial direction of the rotating shaft 561, the angle between the second abutting surface 5724a and the axial direction of the rotating shaft 561, and the angle between the third abutting surface 5727a and the axial direction of the rotating shaft 561 are not the same. Optionally, the angle between the first abutting surface 5721a and the axial direction of the rotating shaft 561 is less than the angle between the second abutting surface 5724a and the axial direction of the rotating shaft 561, and the angle between the first abutting surface 5721a and the axial direction of the rotating shaft 561 is less than the angle between the third abutting surface 5727a and the axial direction of the rotating shaft 561; optionally, the angle between the first abutting surface 5721a and the axial direction of the rotating shaft 561 is greater than 40 degrees and less than 90 degrees, and the angles between the second abutting surface 5724a and the axial direction of the rotating shaft 561 and the angle between the third abutting surface 5727a and the axial direction of the rotating shaft 561 are both less than 90 degrees. The angles between the first inclined surface 5721b and the axial direction of the rotating shaft 561, the angle between the second inclined surface 5724b and the axial direction of the rotating shaft 561, and the angle between the third inclined surface 5727b and the axial direction of the rotating shaft 561 are not the same; optionally, the angle between the first inclined surface 5721b and the axial direction of the rotating shaft 561 is less than the angle between the second inclined surface 5724b and the axial direction of the rotating shaft 561, and the angle between the first inclined surface 5721b and the axial direction of the rotating shaft 561 is less than the angle between the third inclined surface 5727b and the axial direction of the rotating shaft 561. Optionally, the angle between the first inclined surface 5721b and the axial direction of the rotating shaft 561 is greater than 45 degrees and less than 90 degrees, and the angles between the second inclined surface 5724b and the axial direction of the rotating shaft 561 and the angle between the third inclined surface 5727b and the axial direction of the rotating shaft 561 are both less than 90 degrees.

[0072] AsAs shown in Figures 12 - 19 , the cam 574 further includes a connecting portion 5748 sleeved on the rotating shaft 561. A plurality of protruding portions are provided on the side of the connecting portion 5748 facing the abutting member 572. The connecting portion 5748 includes a first connecting block 5748a and a second connecting block 5748b that are connected to each other. At least one of the plurality of protruding portions is provided on the first connecting block 5748a, and the other protruding portions are provided on the second connecting block 5748b. In this embodiment, both the first connecting block 5748a and the second connecting block 5748b are arc-shaped. The first protruding portion 5741 is provided on the first connecting block 5748a, and the second protruding portion 5744 and the third protruding portion 5747 are provided on the second connecting block 5748b at intervals. The first connecting block 5748a and the second connecting block 5748b are connected to each other to enclose a first through hole 5749, and the rotating shaft 561 is rotatably inserted through the first through hole 5749. Preferably, the inner diameter of the first connecting block 5748a is the same as the inner diameter of the second connecting block 5748b, and the outer diameter of the first connecting block 5748a is the same as the outer diameter of the second connecting block 5748b. The first through hole 5749 is a circular hole. The side of the first connecting block 5748a facing away from the first protruding portion 5741 and the side of the second connecting block 5748b facing away from the second protruding portion 5744 are respectively connected to the side of the first sliding cylinder 5730 facing the link member 562, and the first connecting block 5748a and the second connecting block 5748b surround the inner cavity of the first sliding cylinder 5730. The axis of the first through hole 5749 is collinear with the axis of the first sliding cylinder 5730.

[0073] ​The abutting cam 5720 further includes a positioning portion 5728 sleeved on the rotating shaft 561. A plurality of abutting convex portions are provided on the side of the positioning portion 5728 facing the abutting member 573. The positioning portion 5728 includes a first positioning block 5728a and a second positioning block 5728b connected to each other. At least one of the plurality of abutting convex portions is provided on the first positioning block 5728a, and the other abutting convex portions are provided on the second positioning block 5728b. In this embodiment, both the first positioning block 5728a and the second positioning block 5728b are arc-shaped. The first abutting convex portion 5721 is provided on the first positioning block 5728a, and the second abutting convex portion 5724 and the third abutting convex portion 5727 are provided on the second positioning block 5728b at intervals. The first positioning block 5728a and the second positioning block 5728b are connected to each other to enclose a second through hole 5729, and the rotating shaft 561 is slidably inserted through the second through hole 5729. Preferably, the inner diameter of the first positioning block 5728a is the same as that of the second positioning block 5728b, the outer diameter of the first positioning block 5728a is the same as that of the second positioning block 5728b, and the second through hole 5729 is a circular hole. The side of the first positioning block 5728a facing away from the first abutting convex portion 5721 and the side of the second positioning block 5728b facing away from the second abutting convex portion 5724 are respectively connected to the side of the sleeve 5622 facing the abutting member 573, and the first positioning block 5728a and the second positioning block 5728b surround the second shaft hole 5624 of the sleeve 5622. The axis of the second through hole 5729 is collinear with the axis of the sleeve 5622.

[0074] Two first sliding cylinders 5730 and two cams 574 are respectively slidably sleeved on a pair of rotating shafts 561. The two rotating shafts 561 are respectively rotatably inserted into the inner cavities of the two first sliding cylinders 5730, and the abutting member 573 can slide along the axial direction of the rotating shaft 561. The connecting bar 5732 is provided with two second connecting holes 5736. The axis of the second connecting hole 5736 is parallel to the axis of the first sliding cylinder 5730. The relative two ends of the rotating shaft 5644 of the synchronous gear 5643 are respectively inserted through the first connecting hole 5654 and the second connecting hole 5736.

[0075] The limiting mechanism 57 further includes a positioning member 576 and a friction assembly 577 that are slidably sleeved on the two rotating shafts 561. The positioning member 576 includes two second sliding cylinders 5760 and a positioning block 5763 that are spaced apart from each other. The two second sliding cylinders 5760 are respectively connected to opposite sides of the positioning block 5763. The two second sliding cylinders 5760 can be respectively slidably sleeved on the two rotating shafts 561. The elastic member 575 is clamped between the first sliding cylinder 5730 and the second sliding cylinder 5760. Specifically, the positioning block 5763 is a rectangular block. The second sliding cylinder 5760 is provided with a second guiding hole 5765 along its axial direction. Each rotating shaft 561 can rotate in the corresponding second guiding hole 5765. The positioning member 576 can only slide along the axial directions of the two rotating shafts 561. Optionally, two avoiding holes 5767 are provided on one side of the positioning block 5763 facing the synchronous gear 5643. One end of the rotating shafts 5644 of the two synchronous gears 5643 can be respectively inserted into the two avoiding holes 5767 of the positioning block 5763. A first anti-sliding portion 5768 is provided on the side surface of the positioning member 576 facing the friction assembly 577.

[0076] The friction assembly 577 includes a first friction member 5770, a gasket 578, a second friction member 5775, and a buckle 579 that are sleeved on the rotating shaft 561. Both the first friction member 5770 and the gasket 578 are connected to the rotating shaft 561. The first friction member 5770 abuts against the positioning member 576. The first friction member 5770 can rotate relative to the positioning member 576 along with the rotating shaft 561. There is a frictional resistance between the first friction member 5770 and the positioning member 576. The second friction member 5775 is sleeved on the rotating shaft 561. One side surface of the gasket 578 abuts against the first friction member 5770, and the opposite side surface of the gasket 578 abuts against the second friction member 5775. The buckle 579 is clamped in the card slot 5616 of the rotating shaft 561. The second friction member 5775 is clamped by the buckle 579 and the gasket 578. The second friction member 5775 can rotate relative to the gasket 578 along with the rotating shaft 561. There is a frictional resistance between the second friction member 5775 and the gasket 578. In this embodiment, the friction assembly 577 includes a pair of first friction members 5770, a pair of second friction members 5775, and a pair of buckles 579. The pair of first friction members 5770 and the pair of second friction members 5775 are respectively sleeved on the two rotating shafts 561. The pair of buckles 579 are respectively clamped in the card slots 5616 of the pair of rotating shafts 561. The pair of first friction members 5770 are clamped by the gasket 578 and the positioning member 576. The pair of second friction members 5775 are clamped by the gasket 578 and the pair of buckles 579. When the rotating shaft 561 rotates relative to the base 53, the first friction member 5770 and the second friction member 5775 rotate along with the rotating shaft 561. There is a frictional resistance between the first friction member 5770 and the positioning member 576 and the gasket 578. There is a frictional resistance between the second friction member 5775 and the gasket 578. The buckle 579 can be, but is not limited to, a C-shaped buckle or a U-shaped buckle, etc.

[0077] Specifically, the first friction member 5770 is a circular friction pad. A first positioning hole 5772 is axially formed in the middle of the first friction member 5770. The first friction member 5770 is fixedly connected to the rotating shaft 561 through the first positioning hole 5772. Second anti-slip portions 5774 are respectively provided on opposite side surfaces of the first friction member 5770, and the second anti-slip portions 5774 can increase the frictional resistance of the first friction member 5770. In this embodiment, a first anti-slip portion 5768 is provided on the side surface of the positioning member 576 facing the first friction member 5770, and a second anti-slip portion 5774 is provided on the side surface of the first friction member 5770 facing the positioning member 576. Optionally, the first anti-slip portion 5768 on the positioning member 576 can be omitted, and only the second anti-slip portion 5774 on the side surface of the first friction member 5770 facing the positioning member 576 is retained; or

[0078] the second anti-slip portion 5774 on the side surface of the first friction member 5770 facing the positioning member 576 can be omitted, and only the first anti-slip portion 5768 on the positioning member 576 is retained.

[0079] The spacer 578 is a strip-shaped plate. Slide holes 5782 are respectively provided at opposite ends of the spacer 578. Third anti-slip portions 5784 are respectively provided on opposite side surfaces of the spacer 578 around each slide hole 5782. In this embodiment, third anti-slip portions 5784 are respectively provided on opposite side surfaces of the spacer 578. Optionally, the third anti-slip portion 5784 on the side surface of the spacer 578 facing the first friction member 5770 can be omitted, and only the second anti-slip portion 5774 on the side surface of the first friction member 5770 facing the spacer 578 is retained; or the second anti-slip portion 5774 on the side surface of the first friction member 5770 facing the spacer 578 can be omitted, and only the third anti-slip portion 5784 on the side surface of the spacer 578 facing the first friction member 5770 is retained. Optionally, the opposite ends of the spacer 578 are respectively provided as arc surfaces.

[0080] The second friction member 5775 is a circular friction pad, and a second positioning hole 5776 is axially formed in the middle of the second friction member 5775. The second friction member 5775 is fixedly connected to the rotating shaft 561 through the second positioning hole 5776. In this embodiment, the gasket 578 is disposed on the side facing the second friction member 5775 with a third anti-slip portion 5784, and the two sides of the second friction member 5775 facing the gasket 578 are provided with a fourth anti-slip portion 5778. Optionally, the third anti-slip portion 5784 on the side of the gasket 578 facing the second friction member 5775 can be omitted, and only the fourth anti-slip portion 5778 on the side of the second friction member 5775 facing the gasket 578 is retained; or the fourth anti-slip portion 5778 on the side of the second friction member 5775 facing the gasket 578 can be omitted, and only the third anti-slip portion 5784 on the side of the gasket 578 facing the second friction member 5775 is retained. The gasket 578 and the second friction member 5775 are abutted against each other, and when the second friction member 5775 rotates with the rotating shaft 561, there is a frictional resistance between the second friction member 5775 and the gasket 578. The first anti-slip portion 5768, the second anti-slip portion 5774, the third anti-slip portion 5784 and the fourth anti-slip portion 5778 can all be, but are not limited to, a rough surface, a damping layer, a plurality of small protrusions or a plurality of small concave convex portions, holes or rough surfaces, etc.

[0081] Please refer to Figures 8 - 13 and Figures 24 - 26, when assembling the folding assistance component 51, insert the end portions of the two rotating shafts 561 away from the connecting cap 5612 into the two first guiding sliding holes 5652 of the fixing member 565 respectively until the fixing member 565 abuts against the connecting cap 5612; engage the gear rings 5646 of the two synchronous gears 5643 with each other and place them between the two link members 562, and the two synchronous gears 5643 respectively engage the two driving gears 5641; insert the end portions of the two rotating shafts 561 away from the connecting cap 5612 into the inner cavities of the two sleeves 5622 respectively, so that the sleeves 5622 are positioned at the first positioning portion 5613 of the rotating shaft 561, and the end portions of the two rotating shafts 5644 of the gear combination 564 close to the fixing member 565 are respectively inserted into the two first connection holes 5654 of the fixing member 565, and the positioning portion 5656 is received in the notch of the corresponding sleeve 5622; each positioning portion 5656 is located between the corresponding first limiting surface 5626 and the second limiting surface 5627. Sleeve the two first sliding cylinders 5730 of the abutting member 573 on the two rotating shafts 561 respectively, so that the two cams 574 can respectively rotatably engage with the two abutting cams 5720; sleeve the two elastic members 575 on the two rotating shafts 561 respectively, and sleeve the two second sliding cylinders 5760 of the positioning member 576 on the two rotating shafts 561 respectively, so that the two elastic members 575 are clamped between the abutting member 573 and the positioning member 576, and the end portions of the two rotating shafts 5644 away from the fixing member 565 respectively pass through the two second connection holes 5736 and the two avoiding holes 5767 of the abutting member 573; sleeve two of the first friction members 5770 on the second positioning portions 5614 of the two rotating shafts 561 respectively, sleeve the gasket 578 on the second positioning portions 5614 of the two rotating shafts 561, and then sleeve the other two second friction members 5775 on the second positioning portions 5614 of the two rotating shafts 561 respectively. At this time, the gasket 578 is located between the first friction member 5770 and the second friction member 5775, and the clamping groove 5616 of each rotating shaft 561 exposes the side surface of the corresponding second friction member 5775 away from the positioning member 576; then snap the two buckles 579 onto the clamping grooves 5616 of the two rotating shafts 561 respectively. At this time, the abutting cam 5720 and the cam 574 on the same rotating shaft 561 are coaxial and cooperate with each other, and the elastic member 575 is in a compressed state to be used for pushing the abutting member 573, so that the abutting cam 5720 rotatably abuts against the cam 574.Place the two first connecting cylinders 5533 of one rotating member 550 in the two receiving grooves 5552 of one connecting member 555, and place the two first connecting cylinders 5533 of the other rotating member 550 in the two receiving grooves 5552 of the other connecting member 555; pass the two rotating shafts 551 through the inner cavities of the corresponding first connecting cylinders 5533 and the inner cavities of the corresponding second connecting cylinders 5553 respectively, so that the two rotating members 550 are rotatably connected to the two connecting members 555 respectively; place the first rotating part 552 of one rotating member 550 in the receiving groove 530 on one side of the base 53, and place the first rotating part 552 of the other rotating member 550 in the receiving groove 530 on the opposite side of the base 53, so that the two arc tracks 5522 of each first rotating part 552 are rotatably placed in the two arc grooves 532 of the base 53 respectively, and the positioning post 5312 is clamped in the positioning hole 5342. Place the combination of the linkage mechanism 56 and the limiting mechanism 57 between the two connecting members 555, slide the two guide rails 5620 of one link member 562 into the two guide chutes 5550 of one connecting member 555 respectively, and slide the two guide rails 5620 of the other link member 562 into the guide chutes 5550 of the other connecting member 555 respectively, so that the two connecting caps 5612, the two rotating shafts 5644 and the positioning rod 5657 are inserted into the two first shaft holes 535, the two connecting holes 536 and the fixing hole 537 respectively.

[0082] When the folding assistance assembly 51 is in the flattened state, the two rotating mechanisms 55 are flattened with each other and the two link members 562 are flattened with each other. The first abutting convex part 5721 abuts against the first descending surface 5741b, the second abutting convex part 5724 abuts against the second descending surface 5744b, and the third abutting convex part 5727 abuts against the third descending surface 5747b; the elastic member 575 is clamped between the abutting member 573 and the positioning member 576, the first friction member 5770 is clamped between the positioning member 576 and the gasket 578, and the second friction member 5775 is clamped between the gasket 578 and the buckle 579. When the folding assistance assembly 51 is in the folded state, the two rotating mechanisms 55 are folded with each other and the two link members 562 are folded with each other. The first abutting convex part 5721 abuts against the first climbing surface 5741a, the second abutting convex part 5724 abuts against the second climbing surface 5744a, and the third abutting convex part 5727 abuts against the third climbing surface 5747a; the elastic member 575 is clamped between the abutting member 573 and the positioning member 576, the first friction member 5770 is clamped between the positioning member 576 and the gasket 578, and the second friction member 5775 is clamped between the gasket 578 and the buckle 579.

[0083] When the folding assist assembly 51 is bent from the flattened state, one of the rotating mechanisms 55 is bent relative to the base 53 towards the other rotating mechanism 55. This one rotating mechanism 55 drives one of the link members 562 to be bent relative to the base 53 towards the other link member 562. This one link member 562 rotates about the axis of the corresponding rotating shaft 561 to drive the corresponding rotating shaft 561, the driving gear 5641 and the corresponding pushing member 572 to rotate about the axis of the rotating shaft 561. The rotating driving gear 5641 drives the other driving gear 5641 to rotate through the synchronizing gear 5643. The rotation of the other driving gear 5641 drives the corresponding rotating shaft 561, the sleeve 5622 and the link member 562 to rotate, so that the two link members 562 of the linkage mechanism 56 approach each other synchronously. During the folding process of the folding assist assembly 51, the pushing members 572 on the two link members 562 rotate relative to the holding members 573 respectively. The first abutting convex portion 5721 slides from the first descending surface 5741b through the first connecting surface 5741c to the first climbing surface 5741a. The second abutting convex portion 5724 slides from the second descending surface 5744b through the second connecting surface 5744c to the second climbing surface 5744a. The third abutting convex portion 5727 slides from the third descending surface 5747b through the third connecting surface 5747c to the third climbing surface 5747a, so that the two abutting cams 5720 respectively rotate and push the two cams 574. The holding member 573 slides axially along the rotating shaft 561 to squeeze the elastic member 575. The elastic member 575 elastically pushes the positioning member 576, so that the first friction member 5770 is clamped between the gasket 578 and the positioning member 576 and the second friction member 5775 is clamped between the gasket 578 and the buckle 579, and the first friction member 5770 and the second friction member 5775 rotate relative to the positioning member 576 and the gasket 578 along with the corresponding rotating shaft 561.

[0084] When the linkage mechanism 56 is deployed from the folded state, one link member 562 is deployed away from the other link member 562 relative to the abutting member 573. The one link member 562 rotates along the axis of the corresponding rotating shaft 561 to drive the corresponding rotating shaft 561, the driving gear 5641 and the corresponding pushing member 572 to rotate along the axis of the rotating shaft 561. The rotating driving gear 5641 drives the other driving gear 5641 to rotate through the synchronous gear 5643, and then drives the corresponding rotating shaft 561, the sleeve 5622 and the corresponding pushing member 572 to rotate, so that the two link members 562 of the linkage mechanism 56 move away from each other synchronously. During the bending process of the folding assist assembly 51, the pushing members 572 on the two link members 562 rotate relative to the base 53 respectively. The first abutting convex portion 5721 slides from the first climbing surface 5741a through the first connecting surface 5741c to the first descending surface 5741b, the second abutting convex portion 5724 slides from the second climbing surface 5744a through the second connecting surface 5744c to the second descending surface 5744b, and the third abutting convex portion 5727 slides from the third climbing surface 5747a through the third connecting surface 5747c to the third descending surface 5747b, so that the two abutting cams 5720 respectively rotate and push the two cams 574. The abutting member 573 slides axially along the rotating shaft 561 to squeeze the elastic member 575. The elastic member 575 elastically pushes the positioning member 576, so that the first friction member 5770 is clamped between the gasket 578 and the positioning member 576 and the second friction member 5775 is clamped between the gasket 578 and the buckle 579, and the first friction member 5770 and the second friction member 5775 rotate relative to the positioning member 576 and the gasket 578 along with the corresponding rotating shaft 561. The frictional torque between each abutting cam 5720 and the corresponding cam 574, the frictional resistance of the first friction member 5770 and the frictional resistance of the second friction member 5775 can limit the two link members 562 at a specific angle between 180 degrees and 0 degrees. When the included angle between the two link members 562 is 180 degrees, the folding assist assembly 51 is in a flattened state. When the included angle between the two link members 562 is 0 degrees, the folding assist assembly 51 is in a folded state. When the included angle between the two link members 562 is greater than 0 degrees and less than 180 degrees, the folding assist assembly 51 is in a hovering state.

[0085] As Figures 5 - 7As shown in the figure, when assembling the folding device 50, place the bases 53 of the two folding assistance components 51 on the two locking portions 592 of the back shell 59 respectively, place the opposite ends of the middle support member 521 on the two bases 53 respectively, and lock the fastener through the connection holes on the middle support member 521 and the mounting holes on the base 53 to the corresponding connection posts; place the two side support members 523 on the opposite sides of the base 53, rotatably accommodate the two rotating tracks 5556 of each connecting member 555 in a corresponding pair of rotating slots 5234 respectively, and pass the first adjustment shaft 5628 of each link member 562 through the corresponding adjustment slot 5237; make the middle support member 521 located between the two side support members 523. When the folding device 50 is in the flattened state, the fronts of the two side support members 523 and the front of the middle support member 521 are coplanar; when the folding device 50 is in the folded state, the fronts of the two side support members 523 and the front of the middle support member 521 enclose a water droplet-shaped space.

[0086] Please also refer to Figures 1 - 4 , place the assembled folding device 50 between the two frames 21, respectively accommodate the two connecting members 555 of each folding assistance component 51 in the mounting slots 216 of the two frames 21 and fixedly connect them to the two frames 21. When the folding shell 20 is in the flattened state, the fronts of the two frames 21, the front of the middle support member 521 and the fronts of the two side support members 523 are coplanar. The back surface of the flexible screen 30 is connected to the fronts of the two frames 21 and the front of the folding device 50, the bendable area 31 faces the folding device 50, and the two non-bendable areas 33 respectively face the bendable mechanisms on the fronts of the two frames 21.

[0087] Please also refer to Figure 1 and Figures 27 to 34, when bending the electronic device 100, a bending force is applied to at least one of the two frames 21 of the electronic device 100, so that the rotating mechanism 55 connected to the two frames 21 rotates in a direction approaching each other, and the folding device 50 is bent by the two folding assisting components 51, and the bendable area 31 bends along with the supporting mechanism 52. Specifically, if a bending force is applied to one frame 21, this one frame 21 drives the corresponding rotating mechanism 55 to rotate relative to the base 53 towards the side close to the flexible screen 30; so as to drive the corresponding link member 562 to rotate relative to the base 53 towards the side close to the flexible screen 30 along the axis of the corresponding rotating shaft 561. At the same time, the guide rail 5620 of the link member 562 slides in the guide chute 5550 of the corresponding connecting member 555, and the sleeve 5622, the rotating shaft 561, the driving gear 5641 and the pushing member 572 of the link member 562 rotate along the axis of the corresponding rotating shaft 561. The rotating driving gear 5641 drives another driving gear 5641 to rotate through the gear combination of the synchronous gear 5643, and then drives the corresponding rotating shaft 561, the sleeve 5622, the pushing member 572 and the link 5623 to rotate, so that the two link members 562 of the linkage mechanism 56 approach each other synchronously; at the same time, the abutting cam 5720 rotates to abut against the corresponding cam 574, and the holding member 573 slides along the axial direction of the rotating shaft 561 to squeeze the elastic member 575. The elastic member 575 elastically abuts against the positioning member 576 so that the first friction member 5770 is clamped between the gasket 578 and the positioning member 576 and the first friction member 5770 is clamped between the gasket 578 and the buckle 579, and the first friction member 5770 and the second friction member 5775 rotate relative to the gasket 578 and the positioning member 576 along with the corresponding rotating shaft 561. During the bending process of the linkage mechanism 56, the first rotating part 552 of the rotating member 550 rotates relative to the base 53 through the cooperation of the arc track and the corresponding arc groove, and the second rotating part 553 of the rotating member 550 is rotatably connected to the corresponding connecting member 555 along the corresponding rotating shaft 551. The first adjusting shaft 5628 slides in the second positioning section 5237b of the adjusting groove 5237 and rotates to the first positioning section 5237a. The two link members 562 rotate along the axis of the corresponding rotating shaft 561 and approach each other, so as to realize the mutual approach of the two side support members 523, make the folding device 50 in a bent state, and the bendable area 31 of the flexible screen 30 bends along with the folding device 50 until the fronts of the two non-bendable areas 33 of the flexible screen 30 are mutually attached, and the bendable area 31 is bent into a water droplet shape, thus realizing the seamless folding of the electronic device 100.

[0088] During the bending process of the electronic device 100, the sum of the frictional torque between the abutting cam 5720 and the cam 574, the frictional resistance of the first friction member 5770, and the frictional resistance of the second friction member 5775 can limit the rebound of the flexible screen 30, so that the side support member 523 is positioned at a specific angle relative to the middle support member 521, and the two frames 21 can be limited at a specific angle between 180 degrees and 0 degrees. When the two frames 21 are bent and limited at 0 degrees, the bendable area 31 of the flexible screen 30 is bent into a water droplet shape, and the two non-bendable areas 33 of the flexible screen 30 are parallel to each other, reducing the duty cycle of the bendable area 31 after bending, so as to reduce the overall thickness of the electronic device 100; when the two frames 21 are flattened and limited at 180 degrees, the bendable area 31 and the two non-bendable areas 33 are coplanar.

[0089] In other bending methods of the electronic device 100, a bending force can also be applied to the two frames 21 at the same time. The two frames 21 respectively drive the two side support members 523 to rotate towards the side close to the flexible screen 30, and the folding device 50 is used to realize the bending of the electronic device 100.

[0090] When the electronic device 100 needs to be flattened, a frame body 21 is pulled outwards, so that two rotating mechanisms 55 connected to the two frame bodies 21 rotate in a direction away from each other, and the folding device 50 is flattened through two folding assisting components 51, and the bendable area 31 is bent along with the support mechanism 52. Specifically, an outward pulling force is applied to a frame body 21 of the electronic device 100, and this frame body 21 drives the corresponding rotating mechanism 55 to rotate relative to the base 53 to the side away from the flexible screen 30, so that the guide slide rail 5620 of the connecting rod member 562 slides in the guide chute 5550 of the corresponding connecting member 555, and the sleeve 5622, the rotating shaft 561, the driving gear 5641 and the pushing member 572 of the connecting rod member 562 rotate along the axis of the corresponding rotating shaft 561. The rotating driving gear 5641 drives another driving gear 5641 to rotate through the synchronous gear 5643, and the rotation of the other driving gear 5641 drives the corresponding rotating shaft 561, the sleeve 5622, the pushing member 572 and the connecting rod 5623 to rotate along the axis of the corresponding rotating shaft 561. The guide slide rails 5620 of the two connecting rod members 562 slide in the guide chutes 5550 of the corresponding connecting members 555, so that the two connecting rod members 562 of the linkage mechanism 56 move away from each other synchronously; at the same time, the two cams 574 respectively rotate and push the two abutting cams 5720, and the elastic member 575 elastically abuts between the positioning member 576 and the abutting member 573, so that the positioning member 576 slides along the axial direction of the rotating shaft 561. The first friction member 5770 is clamped between the gasket 578 and the positioning member 576, and the second friction member 5775 is clamped between the gasket 578 and the buckle 579, and the first friction member 5770 and the second friction member 5775 rotate relative to the gasket 578 and the positioning member 576 along with the corresponding rotating shaft 561; during the flattening process of the linkage mechanism 56, the first rotating part 552 of the rotating member 550 rotates relative to the base 53, and the second rotating part 553 of the rotating member 550 is rotatably connected to the corresponding connecting member 555. The first adjusting shaft 5628 slides in the first positioning section 5237a of the adjusting groove 5237 and rotates to the second positioning section 5237b. At the same time, the two connecting rod members 562 respectively rotate along the axis of the corresponding rotating shaft 561 and move away from each other to realize the mutual separation of the two side support members 523, so that the folding device 50 is unfolded, and the bendable area 31 of the flexible screen 30 is unfolded along with the folding device 50 until the flexible screen 30 is flattened.

[0091] During the flattening process of the electronic device 100, the frictional torque between the cam 574 and the abutting cam 5720, and the frictional torque of the first friction member 5770 and the second friction member 5775 can limit the rebound of the flexible screen 30, so that the side support member 523 is positioned at a specific angle relative to the middle support member 521, and the two frame bodies 21 can be limited at a specific angle between 0 degrees and 180 degrees.

[0092] In other flattening methods of the electronic device 100, an outward pulling force can also be applied to the two frames 21 at the same time. The two frames 21 respectively drive the base 53 to rotate away from each other relative to the rotating mechanisms 55 on both sides, so as to drive the two link members 562 on both sides of the base 53 to rotate away from each other, so that the two side support members 523 rotate to the side away from the flexible screen 30, and the folding device 50 is used to realize the unfolding of the electronic device 100.

[0093] The outer contours of the first protruding portion 5741, the second protruding portion 5744, and the third protruding portion 5747 of the cam 574 of the folding device 50 of the electronic device 100 of the present invention are different. Therefore, the torsions between the first protruding portion 5741 and the first abutting convex portion 5721, between the second protruding portion 5744 and the second abutting convex portion 5724, and between the third protruding portion 5747 and the third abutting convex portion 5727 are different, which can make the torsion more balanced when the cam 574 rotates relative to the abutting cam 5720 when the electronic device 100 is unfolded or folded. The torsion will not be too large, so that the electronic device 100 has a better folding or unfolding feel, makes the folding or unfolding of the electronic device 100 smoother, improves the user experience, and has a better improvement on the wear of the cam surface of the cam 574 and the cam surface of the abutting cam 5720, so that the folding device 50 has a better hovering effect. Secondly, the electronic device 100 realizes synchronous bending or unfolding through the folding assist assembly 51. There is a frictional torsion between the abutting cam 5720 and the cam 574, and the first friction member 5770 and the second friction member 5775 also have frictional resistance; the bending of the electronic device 100 can be stably limited at a specific angle between 0 degrees and 180 degrees, realizing the hovering function of the whole machine.

[0094] The above are the implementation manners of the embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the embodiments of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A folding device, characterized in that, The folding device includes: a base; a linkage mechanism including a rotating shaft and a connecting rod member, the rotating shaft being rotatably connected to the base, and the connecting rod member being connected to the rotating shaft; and a limiting mechanism including a pushing member, a holding member and an elastic member provided on the connecting rod member, the pushing member including a pushing cam sleeved on the rotating shaft, the holding member including a cam sleeved on the rotating shaft, the pushing cam being capable of rotating relative to the cam about the axis of the rotating shaft, and the elastic member being used to push the holding member so that the cam and the pushing cam cooperate with each other; wherein, the cam includes a plurality of protruding portions arranged circumferentially around the rotating shaft, the pushing cam includes a plurality of pushing convex portions arranged circumferentially around the rotating shaft, at least two of the plurality of protruding portions have different outer contours, and / or at least two of the plurality of pushing convex portions have different outer contours.

2. The folding device according to claim 1, characterized in that, The plurality of protruding portions include a first protruding portion and a second protruding portion, the first protruding portion includes a first climbing surface on one side thereof, the second protruding portion includes a second climbing surface on one side thereof, and the plurality of pushing convex portions include a first pushing convex portion and a second pushing convex portion; when the folding device is in a folded state, the first pushing convex portion abuts against the first climbing surface, the second pushing convex portion abuts against the second climbing surface, the tangent plane between the first pushing convex portion and the first climbing surface forms a first climbing angle with the radial direction of the rotating shaft, the tangent plane between the second pushing convex portion and the second climbing surface forms a second climbing angle with the radial direction of the rotating shaft, and the first climbing angle is smaller than the second climbing angle.

3. The folding device according to claim 2, characterized in that, The first protruding portion further includes a first descending surface facing away from the first climbing surface, and the second protruding portion further includes a second descending surface facing away from the second climbing surface; when the folding device is in a flattened state, the first pushing convex portion abuts against the first descending surface, the second pushing convex portion abuts against the second descending surface, the tangent plane between the first pushing convex portion and the first descending surface forms a first descending angle with the radial direction of the rotating shaft, the tangent plane between the second pushing convex portion and the second descending surface forms a second descending angle with the radial direction of the rotating shaft, and the first descending angle is smaller than the second descending angle.

4. The folding device according to claim 3, wherein The first protruding portion further includes a first connecting surface connecting the first climbing surface and the first descending surface, and the second protruding portion further includes a second connecting surface connecting the second climbing surface and the second descending surface, the length of the first connecting surface along the circumferential direction of the rotating shaft is smaller than the length of the second connecting surface along the circumferential direction of the rotating shaft; when the folding device is in a hovering state, the first pushing convex portion abuts against the first connecting surface, and the second pushing convex portion abuts against the second connecting surface.

5. The folding device according to claim 4, characterized in that, During the process of the folding device changing from the folded state to the flattened state, the first abutting convex part slides from the first climbing surface through the first connecting surface to the first descending surface, and the second abutting convex part slides from the second climbing surface through the second connecting surface to the second descending surface; during the process of the folding device changing from the flattened state to the folded state, the first abutting convex part slides from the first descending surface through the first connecting surface to the first climbing surface, and the second abutting convex part slides from the second descending surface through the second connecting surface to the second climbing surface.

6. The folding device according to claim 2, characterized in that, The range of the first climbing angle is 40 degrees - 80 degrees, and the range of the second climbing angle is 45 degrees - 80 degrees.

7. The folding device according to claim 3, characterized in that, The range of the first descending angle is 45 degrees - 80 degrees, and the second descending angle is greater than the first descending angle and less than 90 degrees.

8. The folding device according to claim 4, wherein, The plurality of the protruding parts further includes a third protruding part, the third protruding part includes a third climbing surface on one side thereof and a third descending surface facing away from the third climbing surface, and the plurality of the abutting convex parts further includes a third abutting convex part; when the folding device is in the folded state, the third abutting convex part abuts against the third climbing surface, and the tangent plane between the third abutting convex part and the third climbing surface forms a third climbing angle with the radial direction of the rotating shaft, and the third climbing angle is different from the first climbing angle; when the folding device is in the flattened state, the third protruding part abuts against the third descending surface, and the tangent plane between the third protruding part and the third descending surface forms a third descending angle with the radial direction of the rotating shaft, and the third descending angle is different from the first descending angle.

9. The folding device according to claim 8, wherein, The third protruding part further includes a third connecting surface connecting the third climbing surface and the third descending surface, and the length of the third connecting surface in the circumferential direction of the rotating shaft is greater than the length of the first connecting surface in the circumferential direction of the rotating shaft. When the folding device is in the hovering state, the third protruding part abuts against the third connecting surface; the first connecting surface, the second connecting surface and the third connecting surface are all arc-shaped surfaces or inclined surfaces.

10. The folding device according to claim 4, wherein The first abutting convex part includes a first abutting surface and a first inclined surface respectively located on its opposite sides, and the second abutting convex part includes a second abutting surface and a second inclined surface respectively located on its opposite sides; when the folding device is in the folded state, the first climbing surface of the first protruding part abuts against the first abutting surface, and the second climbing surface of the second protruding part abuts against the second abutting surface; When the folding device is in the flattened state, the first descending surface of the first protruding part abuts against the first inclined surface, and the second descending surface of the second protruding part abuts against the second inclined surface.

11. The folding device according to claim 10, characterized in that, The first abutting convex portion further includes a first guiding sliding surface connecting the first abutting surface and the first inclined surface, and the second abutting convex portion further includes a second guiding sliding surface connecting the second abutting surface and the second inclined surface; when the folding device is in a hovering state, the first connecting surface of the first protruding portion abuts against the first guiding sliding surface, and the second connecting surface of the second protruding portion abuts against the second guiding sliding surface; during the process of the folding device changing from a folded state to a flattened state, the first protruding portion slides from the first abutting surface to the first inclined surface via the first guiding sliding surface, and the second protruding portion slides from the second abutting surface to the second inclined surface via the second guiding sliding surface.

12. The folding device according to claim 1, characterized in that, The cam further includes a connecting portion sleeved on the rotating shaft, and a plurality of the protruding portions are arranged on one side of the connecting portion facing the pushing member. The connecting portion includes a first connecting block and a second connecting block connected to each other, and at least one of the plurality of protruding portions is arranged on the first connecting block, and the other protruding portions are arranged on the second connecting block.

13. The folding device according to claim 1, wherein, The abutting cam further includes a positioning portion sleeved on the rotating shaft, and a plurality of the abutting convex portions are arranged on one side of the positioning portion facing the holding member. The positioning portion includes a first positioning block and a second positioning block connected to each other, and at least one of the plurality of abutting convex portions is arranged on the first positioning block, and the other abutting convex portions are arranged on the second positioning block.

14. The folding device according to claim 1, wherein, The linkage mechanism includes two of the rotating shafts, two of the link members, and a gear combination. One of the link members is connected to one of the rotating shafts, and the other link member is connected to the other rotating shaft. The gear combination is arranged between the two link members, and the two link members can rotate synchronously through the gear combination; each of the link members is provided with the pushing member, and the pushing member can rotate around the axis of the corresponding rotating shaft along with the corresponding link member. The holding member further includes a connecting strip, and cams are respectively arranged at opposite ends of the connecting strip, and the two cams respectively cooperate with the two abutting cams.

15. The folding device according to claim 14, characterized in that, The limiting mechanism further includes positioning members slidably sleeved on the two rotating shafts, and elastic members are sleeved on each of the rotating shafts, and the elastic members are clamped between the holding member and the positioning members.

16. The folding device according to claim 15, characterized in that, The limiting mechanism further includes a first friction member sleeved on the rotating shaft, and the first friction member abuts against the positioning member. The first friction member can rotate relative to the positioning member along with the corresponding rotating shaft, and there is a frictional resistance between the first friction member and the positioning member.

17. The folding device according to claim 16, wherein, The limiting mechanism further includes a gasket and a second friction member sleeved on the rotating shaft. The second friction member is sleeved on the rotating shaft. One side surface of the gasket abuts against the first friction member, and the opposite side surface of the gasket abuts against the second friction member. The second friction member can rotate relative to the gasket along with the corresponding rotating shaft, and there is a frictional resistance between the second friction member and the gasket.

18. A folding housing, characterized in that, The folding housing includes a folding device as described in any one of claims 1-17 and two frames, the folding device being located between the two frames, and the two frames being respectively connected to opposite sides of the folding device.

19. An electronic device, characterized in that, The electronic device includes a flexible screen and a folding housing as described in claim 18, the flexible screen being disposed on the folding housing.

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