Folding device, folding housing and electronic device

Abstract

The application provides a folding device, which comprises a base, a rotating shaft, a connecting rod, a supporting member and an elastic member. The rotating shaft is connected to the base. The connecting rod is rotatably connected to the rotating shaft relative to the base. The supporting member is slidably connected to the rotating shaft along the axial direction of the rotating shaft. The elastic member is used for pushing the supporting member to abut against the connecting rod. The connecting rod and the supporting member are connected through the cooperation of a first cam and a second cam. The first cam has an abutting curved surface. The second cam is slidably abutted against the abutting curved surface. The abutting curved surface comprises a first abutting section and a second abutting section at opposite ends thereof, and a hovering section connected between the first abutting section and the second abutting section. The second cam is abutted against the first abutting section, the second abutting section and the hovering section respectively, so that the folding device is in a flat state, a completely folded state and a hovering state. The application also provides a folding shell and an electronic device provided with the folding device.

Description

Technical Field

[0001] This invention relates to the field of flexible screen support, and more 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 Technology

[0002] Currently, foldable electronic products with flexible displays are becoming increasingly popular. In existing foldable electronic products, the flexible displays are generally supported by folding devices. In order to make foldable electronic products thinner and lighter, the size of the folding devices is also becoming smaller and smaller. However, existing foldable electronic products generally require users to use both hands to open them, making it difficult to open them with one hand, which is inconvenient and affects the user experience. Summary of the Invention

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

[0004] This application provides a folding device, comprising a base, a rotating shaft, a connecting rod, a supporting member, and an elastic member. The rotating shaft is connected to the base, the connecting rod is rotatably connected to the rotating shaft relative to the base, the supporting member is slidably connected to the rotating shaft along its axial direction, and the elastic member is used to push the supporting member against the connecting rod. The connecting rod and the supporting member are connected by a first cam and a second cam. The first cam has a supporting curved surface, and the second cam slidably abuts against the supporting curved surface. The supporting curved surface includes a first supporting segment and a second supporting segment located at opposite ends, and a hovering segment connecting the first supporting segment and the second supporting segment. When the folding device is in a flattened state, the second cam abuts against the first supporting segment; when the folding device is in a fully folded state, the second cam abuts against the second supporting segment; and when the folding device is in a hovering state, the second cam abuts against the hovering segment.

[0005] This application also provides a folding housing, which includes a folding device and two frames. The folding device is located between the two frames, and the opposite sides of the folding device are respectively connected to the two frames. One of the two frames is provided with a first magnetic attractor, and the other is provided with a second magnetic attractor. When the folding housing is in a fully folded state, the first magnetic attractor and the second magnetic attractor attract each other. When the two frames are unfolded relative to each other until there is no attraction between the first magnetic attractor and the second magnetic attractor, the elastic member pushes the second cam to slide on the abutting curved surface of the folding device, causing the connecting rod to rotate relative to the base, so that the two frames are unfolded relative to each other to a suspended state.

[0006] This application also provides an electronic device, which includes a flexible screen, two frames, and a folding device. The folding device is located between the two frames, and the opposite sides of the folding device are respectively connected to the two frames. The flexible screen includes a bendable area provided on the folding device. One of the two frames is provided with a first magnetic attractor, and the other is provided with a second magnetic attractor. When the electronic device is folded, the attraction force between the first magnetic attractor and the second magnetic attractor is greater than or equal to the sum of the unfolding force between the second cam of the folding device and the abutting curved surface and the rebound force of the bendable area, so that the electronic device remains in a fully folded state. When the two frames are unfolded to the point that there is no attraction force between the first magnetic attractor and the second magnetic attractor, the unfolding force and the rebound force together drive the two frames to unfold to a hovering state.

[0007] The folding device of the electronic device of this application is connected to the connecting rod and the supporting member by the cooperation of a first cam and a second cam. The first cam has a top-abutting curved surface, which includes a first top-abutting section and a second top-abutting section located at opposite ends, and a hovering section connected between the first top-abutting section and the second top-abutting section. When the second cam slides along the second top-abutting section of the top-abutting curved surface to the hovering section, it has an unfolding force that drives the corresponding connecting rod to rotate relative to the base and unfold. When the folding device unfolds, the unfolding force drives the connecting rod to automatically rotate relative to the base and unfold to the hovering state, thereby realizing that the folding device can automatically unfold to the hovering state. The electronic device automatically unfolds to the hovering state as the folding device unfolds, which is convenient to use and improves the user experience. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0009] Figure 1 This is a three-dimensional structural schematic diagram of an electronic device according to one embodiment of this application;

[0010] Figure 2 yes Figure 1 An exploded view of the folding housing and flexible screen of the electronic device.

[0011] Figure 3 yes Figure 2 A three-dimensional structural diagram of the folding device in the diagram;

[0012] Figure 4 yes Figure 3 An exploded view of the three-dimensional structure of the folding device in the diagram;

[0013] Figure 5 yes Figure 4 A three-dimensional structural breakdown diagram of the bendable component from another perspective;

[0014] Figure 6 yes Figure 4 A three-dimensional structural diagram of the folding aid component;

[0015] Figure 7 yes Figure 6 A three-dimensional structural diagram of the folding aid component from another perspective;

[0016] Figure 8 yes Figure 6 An exploded view of the three-dimensional structure of the folding aid component;

[0017] Figure 9 yes Figure 8 A three-dimensional structural diagram of the folding aid component from another perspective;

[0018] Figure 10 yes Figure 9 A three-dimensional structural diagram of the linkage mechanism and the limiting mechanism in the diagram;

[0019] Figure 11 yes Figure 10 A three-dimensional structural diagram of the linkage mechanism and the limiting mechanism from another perspective;

[0020] Figure 12 yes Figure 10 A three-dimensional exploded view of the linkage mechanism and the limiting mechanism in the diagram;

[0021] Figure 13 yes Figure 12 A three-dimensional structural breakdown diagram of the linkage mechanism and the limiting mechanism from another perspective;

[0022] Figure 14 yes Figure 12 Enlarged view of the three-dimensional structure of the two connecting rods and the supporting member;

[0023] Figure 15 yes Figure 10 A schematic diagram of the mating structure between the first cam of the connecting rod and the second cam of the abutment;

[0024] Figure 16 yes Figure 10 A front structural diagram of the linkage mechanism and the limiting mechanism in the middle;

[0025] Figure 17 yes Figure 10 A schematic diagram of the rear structure of the linkage mechanism and the limiting mechanism in the middle;

[0026] Figure 18yes Figure 10 A three-dimensional sectional view of one of the linkage and limiting mechanisms in the diagram;

[0027] Figure 19 yes Figure 10 Another three-dimensional sectional view of the linkage mechanism and the limiting mechanism in the middle;

[0028] Figure 20 yes Figure 10 Another three-dimensional sectional view of the linkage mechanism and the limiting mechanism in the middle;

[0029] Figure 21 yes Figure 1 A three-dimensional structural diagram of the electronic device in its fully folded state;

[0030] Figure 22 yes Figure 21 A three-dimensional structural diagram of the linkage mechanism and the limiting mechanism in the diagram;

[0031] Figure 23 yes Figure 22 A three-dimensional structural diagram of the linkage mechanism and the limiting mechanism from another perspective;

[0032] Figure 24 yes Figure 22 A schematic diagram of the mating structure between the first cam of the connecting rod and the second cam of the abutment;

[0033] Figure 25 yes Figure 1 A three-dimensional structural diagram of the hovering state of electronic devices in the image;

[0034] Figure 26 yes Figure 25 A three-dimensional structural diagram of the folding device in the diagram;

[0035] Figure 27 yes Figure 26 A three-dimensional structural diagram of the linkage mechanism and limiting mechanism of one of the folding components;

[0036] Figure 28 yes Figure 27 A three-dimensional structural diagram of the linkage mechanism and the limiting mechanism from another perspective;

[0037] Figure 29 yes Figure 27 A schematic diagram of the mating structure between the first cam of the connecting rod and the second cam of the abutment.

[0038] Explanation of main labels:

[0039] 100. Electronic device; 20. Folding housing; 21. Frame; 211. First magnetic clasp; 213. Second magnetic clasp; 30. Flexible screen; 31. Bending area; 33. Non-bending area; 40. Folding device; 41. Folding aid assembly; 42. Bending assembly; 421. Central support member; 4210. First support plate; 4211. First back surface; 4212. First connecting area; 4218. Back cover; 423. Side support member; 4230. Second support plate; 4231. Second back surface; 4232. Second connecting area; 4233. First connecting part; 4234. Rotating groove; 4236. Second connecting part; 4237. Adjustment groove; 4237a. First positioning section; 4237b. 44. Base; 440. Receiving groove; 442. Arc groove; 443. Positioning hole; 445. Adapter hole; 446. Connecting hole; 447. Fixing hole; 45. Rotating mechanism; 450. Rotating component; 451. Connecting shaft; 452. First rotating part; 4522. Arc rail; 453. Second rotating part; 454. First connecting cylinder; 455. Connecting component; 4550. Guide groove; 4552. Receiving groove; 4556. Rotating rail; 456. Second connecting cylinder; 46. Linkage mechanism; 460. First cam; 4601. Abutting surface; 4602. First abutting section; 4603. Hovering section; 4604. Second abutting section; 4605. First protrusion; 4606. First connecting part Surface; 4607, Second connecting surface; 4608, First recess; 461, Rotating shaft; 4610, Shaft body; 4612, Connecting cap; 4613, Positioning part; 4616, Slot; 462, Connecting rod; 4620, Guide rail; 4621, Drive gear; 4622, First sleeve; 4623, Connecting rod body; 4624, Sleeve hole; 4626, First limiting surface; 4627, Second limiting surface; 4628, Adjusting shaft; 464, Gear set; 4642, Linkage gear; 4644, Rotating shaft; 465, Fixing part; 4652, Second guide hole; 4654, First shaft hole; 4656, Positioning part; 4657, Positioning rod; 47, Limiting mechanism; 473, Supporting part; 4 730, Second cam; 4731, Second protrusion; 4732, Second sleeve; 4733, Sliding surface; 4734, Connecting part; 4735, Second recess; 4736, Second shaft hole; 475, Elastic element; 476, Positioning element; 4761, Guide plate; 4763, Extension; 4765, First guide hole; 4767, Alternating hole; 4768, First anti-slip part; 477, Friction assembly; 4770, First friction element; 4772, First positioning hole; 4774, Second anti-slip part; 4775, Second friction element; 4776, Second positioning hole; 4778, Fourth anti-slip part; 478, Gasket; 4782, Through hole; 4784, Third anti-slip part; 4779, C-shaped buckle. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Furthermore, the following descriptions of various embodiments are based on the accompanying illustrations and are used to illustrate specific embodiments that can be implemented in this application. Directional terms used in this application, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying illustrations. Therefore, the directional terms used are for better and clearer explanation and understanding of this application, and are not intended to indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," and "set on" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] Please refer to the following: Figures 1 to 11 In one embodiment of the present invention, the electronic device 100 includes a folding housing 20 and a flexible screen 30 disposed on the folding housing 20. The folding housing 20 includes two frames 21 and a folding device 40 disposed between the two frames 21, with opposite sides of the folding device 40 connected to the two frames 21 respectively; the flexible screen 30 is disposed on the front of the two frames 21 and the front of the folding device 40. The flexible screen 30 includes a bendable area 31 and two non-bendable areas 33 disposed on the folding device 40, with the two non-bendable areas 33 respectively connected to opposite sides of the bendable area 31. The folding device 40 supports the bendable area 31 of the flexible screen 30, and the folding device 40 can be bent or flattened. The flexible screen 30 can be bent or flattened along with the bending or flattening of the folding device 40, and the bendable area 31 can be bent into a U-shape, a teardrop shape, or other shapes. In this embodiment, the bendable area 31 can be bent into a teardrop shape. One of the two frames 21 is provided with a first magnetic 211 and the other is provided with a second magnetic 213. When the folding shell 20 is in a fully folded state, the first magnetic 211 and the second magnetic 213 attract each other to keep the folding shell 20 in a fully folded state.

[0044] The folding device 40 includes a folding aid component 41 and a bendable component 42 connected to the folding aid component 41. The folding aid component 41 includes a base 44, a rotating mechanism 45, a linkage mechanism 46, and a limiting mechanism 47. The rotating mechanism 45 includes a rotating member 450 and a connecting member 455. The rotating member 450 is rotatably connected to the base 44, and one end of the rotating member 450 away from the base 44 is rotatably connected to the connecting member 455 through a connecting shaft 451. The linkage mechanism 46 includes a rotating shaft 461, a connecting rod 462, and a gear set 464. The rotating shaft 461 is rotatably connected to the base 44, and the connecting rod 462 is rotatably connected to the rotating shaft 461 relative to the base 44. The limiting mechanism 47 includes a supporting member 473, an elastic member 475, and a friction assembly 477. The supporting member 473 and the friction assembly 477 are both slidably connected to the rotating shaft 461 along the axial direction of the rotating shaft 461. The elastic member 475 is used to push the supporting member 473 against the connecting rod 462. 75 provides a spring force that causes the abutment 473 and the connecting rod 462 to abut against each other; the connecting rod 462 and the abutment 473 are connected by the cooperation of a first cam and a second cam, the first cam being provided on one of the connecting rod 462 and the abutment 473, and the second cam being provided on the other of the connecting rod 462 and the abutment 473; in this embodiment, the end of the connecting rod 462 facing the abutment 473 is provided with a first cam 460, and the end of the abutment 473 facing the connecting rod 462 is provided with a second cam 4730. The first cam 460 has an abutting surface 4601, and the second cam 4730 slidably abuts against the abutting surface 4601. The abutting surface 4601 includes a first abutting section 4602 and a second abutting section 4604 located at opposite ends thereof, and a hovering section 4603 connecting the first abutting section 4602 and the second abutting section 4604. When the folding device 40 is in a flattened state, the second cam 4730 abuts against the first abutting section 4602, that is, the second cam 4730 is positioned at the first abutting section 4602. When the folding device 40 is in a fully folded state, the second cam 4730 abuts against the second abutting section 4604, that is, the second cam 4730 is positioned at the second abutting section 4604. When the folding device 40 is in a hovering state, the second cam 4730 abuts against the hovering section 4603, that is, the second cam 4730 is positioned at the hovering section 4603. The second cam 4730 has an unfolding force during the sliding process between the second abutting section 4604 and the hovering section 4603 of the abutting surface 4601. This unfolding force is used to drive the second cam 4730 to automatically slide from the second abutting section 4604 to the hovering section 4603. The connecting rod 462 rotates automatically relative to the base 44 to realize the automatic unfolding of the folding device 40 from the fully folded state to the hovering state. The electronic device 100 can automatically unfold from the fully folded state to the hovering state.In this embodiment, the linkage mechanism 46 includes two rotating shafts 461 and two connecting rods 462. The two rotating shafts 461 are rotatably connected to opposite sides of the same end of the base 44. One connecting rod 462 is rotatably connected to one of the rotating shafts 461 relative to the base 44, and the other connecting rod 462 is rotatably connected to the other rotating shaft 461 relative to the base 44. A gear set 464 is disposed between the two connecting rods 462. The two connecting rods 462 can rotate synchronously relative to the base 44 through the gear set 464. The two connecting rods 462 are slidably connected to the two rotating mechanisms 45 respectively.

[0045] When the rotating mechanism 45 rotates relative to the base 44, the connecting rod 462 and the corresponding rotating shaft 461 rotate together around the axis of the rotating shaft 461, so that the first cam 460 rotates relative to the second cam 4730, and the second cam 4730 slides along the corresponding abutting surface 4601. The two connecting rods 462 rotate synchronously under the action of the gear set 464 and move closer or further away from each other, so as to realize the unfolding or folding of the folding aid component 41. During the process of the second cam 4730 sliding from the second abutting section 4604 to the hovering section 4603, there is an unfolding force between the second cam 4730 and the abutting surface 4601 that drives the connecting rod 462 to rotate relative to the base 44 and unfold. This unfolding force is used to drive the two connecting rods 462 to automatically unfold from the fully folded state to the hovering state, so that the folding aid component 41 can be automatically unfolded.

[0046] The bendable assembly 42 has at least one folding aid component 41 on its back side. In this embodiment, there are two folding aid components 41, which are respectively disposed at opposite ends of the back side of the bendable assembly 42. The bendable assembly 42 includes a central support member 421 and two side support members 423 connected to opposite sides of the central support member 421. The two side support members 423 are movably connected to two rotating mechanisms 45 and two connecting rods 462, respectively. The back side of the flexible screen 30 is in contact with the front side of the central support member 421 and the side support members 423. One of the rotating mechanisms 45 rotates relative to the base 44 around the axis of the corresponding rotating shaft 461, which drives the other side support member 423 to rotate synchronously relative to the base 44 around the axis of the corresponding rotating shaft 461 through the linkage mechanism 46, so as to realize the synchronous unfolding or synchronous bending of the bendable assembly 42, that is, to realize the synchronous folding or synchronous unfolding of the folding device 40. During the flattening process of the folding device 40, the second cam 4730 slides along the second abutting section 4604 of the corresponding abutting surface 4601 to the hovering section 4603 with unfolding force. This unfolding force drives the two connecting rods 462 to rotate automatically relative to the base 44 and move away from each other, so as to drive the bendable component 42 to automatically unfold to the hovering state, thereby realizing the automatic unfolding of the folding device 40 from the fully folded state to the hovering state.

[0047] It should be noted that: the "front" refers to the side facing the same direction as the light-emitting surface of the flexible screen 30, and the "back" refers to the side facing away from the light-emitting surface of the flexible screen 30. The "flattened state" means that the fronts of the two frames 21, the front of the middle support member 421 of the bendable assembly 42, and the fronts of the side support members 423 are coplanar, that is, the angle between the fronts of the two side support members 423 is 180 degrees, and the angle between the front of the second middle support member 236 and the front of the second side support member 233 is 180 degrees; the "fully folded state" means that the fronts of the middle support member 421 and the fronts of the side support members 423 of the bendable assembly 42 form a teardrop-shaped space, with the two... The front surfaces of the frames 21 are parallel and spaced apart. The hovering state refers to any folded state formed by the front surfaces of the central support member 421 and the side support members 423 of the bendable component 42, excluding coplanar and teardrop-shaped spaces. This means the electronic device 100 is in a folded state where the angle between the front surfaces of the two frames 21 is greater than 0 degrees and less than 180 degrees. Preferably, when the electronic device 100 is in the hovering state, the angle between the front surfaces of the two frames 21 is either greater than 90 degrees or less than 150 degrees. The electronic device 100 is, for example, but not limited to, mobile phones, tablets, monitors, LCD panels, OLED panels, televisions, smartwatches, VR headsets, automotive displays, and any other products and components with display functions. In the description of this embodiment, "connection" includes both direct and indirect connections. For example, a connection between A and B includes a direct connection between A and B or a connection through a third element C or more other elements. Connections also include integrated and non-integrated connections. An integrated connection means that A and B are formed and connected as a single unit, while a non-integrated connection means that A and B are not formed and connected as a single unit.

[0048] The folding device 40 of the electronic device 100 of the present invention includes a bendable component 42 and a folding aid component 41. The folding aid component 41 includes a rotating mechanism 45, a linkage mechanism 46, and a limiting mechanism 47. The connecting rod 462 of the linkage mechanism 46 is rotatably connected to the base 44 via a rotating shaft 461. The abutment 473 of the limiting mechanism 47 is slidably connected to the rotating shaft 461. The connecting rod 462 and the abutment 473 are connected by the cooperation of a first cam 460 and a second cam 4730. The first cam 460 has an abutting surface 4601, which includes a first abutting section 4602 and a second abutting section 4604 located at opposite ends, and a hovering section 4603 connecting the first abutting section 4602 and the second abutting section 4604. When the second cam 4730 slides along the second abutting section 4604 of the abutting surface 4601 to the hovering section 4603, it has an unfolding force that drives the corresponding connecting rod 462 to rotate relative to the base 44 and unfold. When the electronic device 100 is in a fully folded state, the first magnetic member 211 and the second magnetic member 213 on the two frames 21 attract each other. When the bendable area 31 bends, it has a rebound force that drives it to unfold. The sum of the unfolding force between the second cam 4730 and the corresponding abutting surface 4601 and the rebound force of the bendable area 31 is less than the magnetic attraction force between the first magnetic member 211 and the second magnetic member 213, so that the electronic device 100 remains in a fully folded state. When unfolding the electronic device 100, the user uses one hand to pry open the small gap between the two frames 21, causing the magnetic attraction between the first magnetic 211 and the second magnetic 213 to disappear. The unfolding force between the second cam 4730 and the corresponding abutting surface 4601, and the rebound force of the bendable area 31 drive the two connecting rods 462 of the folding aid component 41 to rotate synchronously relative to the base 44 and move away from each other. The second cam 4730 automatically slides from the second abutting section 4604 to the hovering section 4603 on the abutting surface 4601, causing the two rotating mechanisms 45 to rotate synchronously relative to the base 44 and move away from each other. This causes the two side supports 423 of the bendable component 42 to unfold synchronously to the hovering state, thereby realizing the automatic unfolding of the electronic device 100 from the fully folded state to the hovering state, which is convenient to use and improves the user experience.

[0049] like Figures 5-9As shown, the rotating member 450 includes a first rotating part 452 and a second rotating part 453 connected to the first rotating part 452. The first rotating part 452 and the second rotating part 453 are respectively disposed at opposite ends of the rotating member 450. The first rotating part 452 is rotatably connected to the base 44, and the second rotating part 453 is rotatably connected to the connecting member 455 through a connecting shaft 451. The base 44 and the first rotating part 452 are rotatably connected by the cooperation of an arc groove and an arc rail. The axis of the arc groove is collinear with the axis of rotation between the rotating member 450 and the base 44. One of the base 44 and the first rotating part 452 is provided with the arc groove, and the other of the base 44 and the first rotating part 452 is provided with the arc rail. In this embodiment, the base 44 has receiving grooves 440 on opposite sides of its front surface. These two receiving grooves 440 respectively accommodate the first rotating parts 452 of the two rotating components 450. The base 44 has arcuate grooves 442 on opposite inner sides of the receiving grooves 440. The two arcuate grooves 442 are coaxial, and their opposite ends pass through the front surface of the base 44. Arcuate rails 4522 are provided on opposite sides of the first rotating parts 452, and these two arcuate rails 4522 are coaxial. When the first rotating part 452 is accommodated in the corresponding receiving groove 440, the two arcuate rails 4522 are rotatably accommodated in the two arcuate grooves 442. The base 44 has positioning holes 443 on its front surface. A fastener passes through the positioning hole 443 and is locked to the back cover, thus fixing the base 44 to the back cover. The end face of the base 44 facing the linkage mechanism 46 is provided with two transition holes 445, two connecting holes 446 and a fixing hole 447. The two transition holes 445 are located on opposite sides of the base 44, the two connecting holes 446 are located between the two transition holes 445, and the fixing hole 447 is located between the two connecting holes 446. The axes of the two transition holes 445 and the two connecting holes 446 are parallel to the axis of the arc groove 442.

[0050] In some embodiments, the arc groove on the base 44 and the arc rail on the first rotating part 452 can be interchanged. Specifically, the two inner sides of the receiving groove 440 of the base 44 are respectively provided with arc rails, and the two arc rails are coaxial; the two sides of the first rotating part 452 are respectively provided with arc grooves, and the two arc grooves are coaxial. When the first rotating part 452 is housed in the corresponding receiving groove 440, the two arc rails are rotatably housed in the two arc grooves.

[0051] The end of the second rotating part 453 away from the first rotating part 452 is rotatably connected to the first end of the connector 455, and the connecting rod 462 is slidably connected to the second end of the corresponding connector 455. Specifically, the second rotating part 453 is provided with a first connecting cylinder 454 at the end away from the first rotating part 452, and the first end of the connector 455 is provided with a receiving groove 4552, in which the first connecting cylinder 454 is rotatably accommodated; the connector 455 includes a second connecting cylinder 456 at its first end, the receiving groove 4552 passes through the second connecting cylinder 456 radially, the first connecting cylinder 454 and the second connecting cylinder 456 are interlocked, such that the first connecting cylinder 454 and the second connecting cylinder 456 are coaxial, and the connecting shaft 451 passes through the inner cavity of the first connecting cylinder 454 and the inner cavity of the second connecting cylinder 456.

[0052] like Figures 3-10 As shown, the end of the connecting rod 462 away from the base 44 is slidably connected to the connector 455. During the rotation of the rotating mechanism 45 and the connecting rod 462 relative to the base 44, the connecting rod 462 slides relative to the connector 455. The end of the connecting rod 462 away from the base 44 and the end of the connector 455 are slidably connected by a guide groove and a guide rail. The guide groove extends along a direction perpendicular to the rotation axis of the rotating member 450 and the base 44. The guide groove is provided in one of the connector 455 and the connecting rod 462, and the guide rail is provided in the other of the connector 455 and the connecting rod 462. In this embodiment, the second end of the connector 455 has a guide groove 4550, and the connecting rod 462 has a guide rail 4620 that slidably passes through the guide groove 4550.

[0053] The connector 455 and the corresponding side support 423 are rotatably connected via a rotating groove and a rotating rail. The rotating groove is located on one of the side support 423 and the connector 455, and the rotating rail is located on the other. In this embodiment, the connector 455 has rotating rails 4556 at opposite ends, and the side support 423 has a rotating groove. The two rotating rails 4556 are rotatably accommodated in the rotating groove, so that the side support 423 is rotatably connected to the connector 455.

[0054] In some embodiments, the connector 455 is provided with rotating grooves at opposite ends, and the side support 423 is provided with rotating rails. The rotating rails are rotatably accommodated in the corresponding rotating grooves so that the side support 423 is rotatably connected to the connector 455.

[0055] Please refer to the following: Figures 6-17The linkage mechanism 46 is located between the limiting mechanism 47 and the rotating mechanism 45. The side support member 423 rotates relative to the central support member 421 through the rotating mechanism 45 and the linkage mechanism 46. The first cam 460 and the second cam 4730 are rotatably engaged with each other. When the first cam 460 rotates relative to the second cam 4730, the second cam 4730 slides against the abutting surface 4601, causing the holding member 473 to slide along the axial direction of the rotating shaft 461, and the elastic member 475 to be compressed. Optionally, under the pushing force of the elastic member 475, the second cam 4730 can automatically slide from the second abutting section 4604 to the hovering section 4603, so as to drive the connecting rod 462 to rotate relative to the base 44 and flatten to the hovering state. During the folding process of the folding device 40, the two connecting rods 462 rotate relative to the base 44 around the axis of the corresponding rotation shaft 461 and move closer to each other. The second cam 4730 slides from the first abutting section 4602 through the suspension section 4603 to the second abutting section 4604 on the corresponding abutting surface 4601 to push the holding member 473 to slide away from the connecting rod 462 along the axial direction of the rotation shaft 461. The elastic member 475 is compressed. The two rotating mechanisms 45 rotate synchronously relative to the base 44 and move closer to each other, so that the two side supports 423 of the bendable assembly 42 fold relative to the middle support 421. During the flattening process of the folding device 40, the second cam 4730, under the pushing force of the elastic member 475, can automatically slide from the second abutment section 4604 to the hovering section 4603, thereby driving the connecting rod 462 to rotate relative to the base 44, so that the folding device 40 automatically unfolds from the fully folded state to the hovering state. Specifically, the two elastic members 475 elastically push against the abutment member 473, so that the abutment member 473 slides along the axial direction of the rotation shaft 461 towards one side of the connecting rod 462, so that the second cam 4730 automatically slides from the second abutment section 4604 to the hovering section 4603 on the corresponding abutment surface 4601, and the two connecting rods 462 automatically rotate relative to the base 44 around the axis of the corresponding rotation shaft 461 and move away from each other. The elastic element 475 partially resets, and the two rotating mechanisms 45 automatically rotate relative to the base 44 and move away from each other, so that the two side supports 423 of the bendable component 42 unfold relative to the middle support 421, and the bendable component 42 of the folding device 40 automatically unfolds from the fully folded state to the hovering state; the user continues to unfold the folding device 40, so that the second cam 4730 slides from the hovering section 4603 to the first abutting section 4602, so as to drive the connecting rod 462 to rotate relative to the base 44, so that the folding device 40 unfolds from the hovering state to the flattened state, until the second cam 4730 abuts against the corresponding first abutting section 4602, and the elastic element 475 holds against the abutting member 473, so that the folding device 40 remains in the flattened state.

[0056] Optionally, the first abutting section 4602 and the hovering section 4603 are connected by an arc, and the second abutting section 4604 and the hovering section 4603 are also connected by an arc. Both the first abutting section 4602 and the second abutting section 4604 are convex surfaces protruding towards the abutting member 473, and the hovering section 4603 is a concave surface recessed away from the abutting member 473. Specifically, the first cam 460 includes at least one first protrusion 4605, and an abutting curved surface 4601 is provided on the side of the first protrusion 4605 facing the second cam 4730. The hovering section 4603 is an arc-shaped surface curved away from the second cam 4730. The second cam 4730 includes at least one second protrusion 4731, and the second protrusion 4731 has a sliding surface 4733 facing the first cam 460. The sliding surface 4733 can slide against the abutting curved surface 4601. Specifically, the first protrusion 4605 also includes a first connecting surface 4606 connected to one end of the first abutting section 4602 away from the hovering section 4603, and a second connecting surface 4607 connected to one end of the second abutting section 4604 away from the hovering section 4603. The first abutting section 4602 and the first connecting surface 4606 are smoothly connected, and the second abutting section 4604 and the second connecting surface 4607 are smoothly connected. In this embodiment, the first cam 460 includes two first protrusions 4605, which are arranged circumferentially along the rotation axis 461. Each first protrusion 4605 has an abutting surface 4601 at one end facing the second cam 4730. The second cam 4730 includes two second protrusions 4731, which are arranged circumferentially along the rotation axis 461. Each second protrusion 4731 has a sliding surface 4733 facing the corresponding first cam 460. The two sliding surfaces 4733 of the second cam 4730 slide against the two abutting surfaces 4601 of the first cam 460. Preferably, the two first protrusions 4605 of the first cam 460 are evenly spaced along the circumference of the rotation axis 461, and the two first protrusions 4605 form a first recess 4608; the two second protrusions 4731 of the second cam 4730 are evenly spaced along the circumference of the rotation axis 461, and the two second protrusions 4731 form a second recess 4735. During the process of the second cam 4730 sliding from the second abutting section 4604 of the corresponding abutting surface 4601 to the hovering section 4603, the second cam 4730 and the abutting surface 4601 have an unfolding force that drives the connecting rod 462 to rotate relative to the base 44 and unfold, so that the folding device 40 automatically unfolds from the fully folded state to the hovering state.

[0057] In other embodiments, the number of second protrusions 4731 on the second cam 4730 corresponds to the number of first protrusions 4605 on the corresponding first cam 460. The first cam 460 includes three or more first protrusions 4605, which are evenly spaced along the circumference of the rotation axis 461, and a first recess 4608 is formed between each two adjacent first protrusions 4605. The second cam 4730 includes three or more second protrusions 4731, which are evenly spaced along the circumference of the second cam 4731, and a second recess 4735 is formed between each two adjacent second protrusions 4731.

[0058] Optionally, both the first abutting section 4602 and the second abutting section 4604 are closer to the abutting member 473 than the hovering section 4603. Specifically, the first length L1 of the first abutting section 4602 extending axially along the rotation axis 461 and the second length L2 of the second abutting section 4604 extending axially along the rotation axis 461 are both greater than the third length L3 of the hovering section 4603 extending axially along the rotation axis 461. The first length L1 may be equal to or not equal to the second length L2. The axial extension length of the first protrusion 4605 along the rotation axis 461 gradually decreases from the first abutting section 4602 to the hovering section 4603, and the axial extension length of the first protrusion 4605 along the rotation axis 461 gradually decreases from the second abutting section 4604 to the hovering section 4603. As the second protrusion 4731 automatically slides from the second abutment section 4604 to the hovering section 4603 on the corresponding abutment surface 4601, the folding device 40 automatically unfolds from the fully folded state to the hovering state; there is an unfolding force between the second cam 4730 and the abutment surface 4601 that drives the connecting rod 462 to rotate relative to the base 44 until the second cam 4730 is positioned at the hovering section 4603.

[0059] like Figures 10-13 As shown, the rotating shaft 461 includes a shaft body 4610 and a connecting cap 4612 located at one end of the shaft body 4610. A positioning part 4613 is provided on the shaft body 4610 near the connecting cap 4612. The connecting rod 462 is fixedly connected to the rotating shaft 461 through the positioning part 4613. In this embodiment, the positioning part 4613 is a positioning surface located on the outer wall of the shaft body 4610 and extending axially along the shaft body 4610. The connecting cap 4612 is used to rotatably connect to the base 44. A groove 4616 is provided at the end of the shaft body 4610 away from the connecting cap 4612. The groove 4616 is located on the outer peripheral wall of the shaft body 4610 and surrounds the shaft body 4610 circumferentially.

[0060] The connecting rod 462 includes a first sleeve 4622 rotatably connected to a corresponding rotating shaft 461, and a connecting rod body 4623 connected to the outer peripheral wall of the first sleeve 4622. The first sleeve 4622 is sleeved on the shaft body 4610 and can rotate about the axis of the rotating shaft 461. A first cam 460 is disposed on the first sleeve 4622. Specifically, the first cam 460 protrudes from the end of the first sleeve 4622 facing the second cam 4730. The first cam 460 and the first sleeve 4622 are coaxial. The first abutting section 4602 and the second abutting section 4604 are both further away from the first sleeve 4622 relative to the hovering section 4603. The hovering section 4603 is bent closer to the first sleeve 4622. One end of the first connecting surface 4606 is connected to the first abutting section 4602, and the other end is connected to the end face of the first sleeve 4622. One end of the second connecting surface 4607 is connected to the second abutting section 4604, and the other end is connected to the first sleeve 4622. The outer peripheral wall of the first sleeve 4622 is provided with a driving gear 4621. Specifically, the driving gear 4621 is located on the side of the first sleeve 4622 away from the connecting rod body 4623, and the axis of the driving gear 4621 is collinear with the axis of the first sleeve 4622. In this embodiment, the teeth of the drive gear 4621 are arranged circumferentially around the first sleeve 4622 with a rotation angle of 180 degrees, meaning that the drive gear 4621 is provided on half of the outer peripheral wall of the first sleeve 4622. The first sleeve 4622 has an oblong socket 4624, and after the rotating shaft 461 is inserted into the socket 4624, the first sleeve 4622 can be positioned on the positioning part 4613. Guide rails 4620 are respectively protruding on opposite sides of the connecting rod body 4623, and the guide rails 4620 extend along the length direction of the connecting rod body 4623.

[0061] like Figures 3-13As shown, the connecting rod 462 and the corresponding side support 423 are movably connected via an adjusting groove and an adjusting shaft. The axis of the adjusting shaft is parallel to the axis of the rotating shaft 461. The adjusting groove is provided in one of the side support 423 and the connecting rod 462, and the adjusting shaft is provided in the other of the side support 423 and the connecting rod 462. In this embodiment, the side support 423 is provided with an adjusting groove 4237, and the end of the connecting rod 4623 away from the rotating shaft 461 is provided with an adjusting shaft 4628. The adjusting shaft 4628 is rotatably and slidably inserted into the adjusting groove 4237. The middle support 421 includes a strip-shaped first support plate 4210 and a back cover 4218 connected to the back of the first support plate 4210. The first support plate 4210 includes a front side and a first back side 4211 facing away from the front side. The first back side 4211 of the first support plate 4210 is provided with a first connecting area 4212 for positioning on the front side of the folding aid assembly 41. In this embodiment, the first back surface 4211 has first connecting areas 4212 at opposite ends, and two folding aid components 41 are respectively connected to the two first connecting areas 4212. The back cover 4218 is a strip frame, and the inner surface of the cover body 4518 has connecting portions at opposite ends. The backs of the bases 44 of the two folding aid components 41 are respectively connected to the two connecting portions of the cover body 4518. Each side support member 423 includes a strip-shaped second support plate 4230 and a second connecting area 4232 disposed on the second back surface 4231 of the second support plate 4230. In this embodiment, the second back surface 4231 has two second connecting areas 4232, which are located at opposite ends of the second support plate 4230. The second connecting areas 4232 are used to connect the corresponding rotating mechanism 45 and the connecting rod 462. Each second connection region 4232 includes a pair of mutually spaced first connection portions 4233 and second connection portions 4236. The first connection portions 4233 are located on the side away from the central support member 421, and the second connection portions 4236 are located on the side closer to the central support member 421. In this embodiment, each second connection portion 4236 is located between a corresponding pair of first connection portions 4233. Each pair of first connection portions 4233 is provided with a pair of arc-shaped rotating grooves 4234, and the axes of the pair of rotating grooves 4234 are collinear. The second connection portion 4236 is provided with an arc-shaped adjusting groove 4237, and the middle part of the adjusting groove 4237 bends away from the second support plate 4230. The adjusting groove 4237 includes a first positioning segment 4237a and a second positioning segment 4237b located at its opposite ends, and the first positioning segment 4237a is closer to the central support member 421 than the second positioning segment 4237b.

[0062] Please refer to the following: Figures 10-14The gear set 464 includes two meshing linkage gears 4642 and two rotating shafts 4644. The two linkage gears 4642 are fixedly sleeved on the middle of the two rotating shafts 4644. The driving gears 4621 of the two connecting rods 462 mesh with the two linkage gears 4642 respectively. The pitch circle diameter of the linkage gears 4642 is smaller than that of the driving gears 4621, and the number of teeth in one circle of the linkage gears 4642 is less than that in one circle of the driving gears 4621. Within a certain width and height space of the rotating shafts 461, the diameter of the pitch circle of the driving gears 4621 is increased by the two linkage gears 4642 set between the two rotating shafts 461, thereby increasing the outer diameter of the first cam 460. This allows for a larger frictional torque between the first cam 460 and the second cam 4730, and reduces fatigue wear of the first cam 460, thus extending the service life of the first cam 460.

[0063] The linkage mechanism 46 also includes a fixing member 465 sleeved on the rotating shaft 461, and the limiting mechanism 47 also includes a positioning member 476. The fixing member 465 is connected to one end of the two rotating shafts 461, and the positioning member 476 is connected to the other opposite ends of the two rotating shafts 461. The connecting rod 462, gear set 464, abutment member 473, and elastic member 475 are located between the fixing member 465 and the positioning member 476. The two opposite ends of the positioning member 476 are respectively provided with first guide holes 4765. The fixing member 465 is a rectangular positioning piece. The two opposite ends of the fixing member 465 are respectively provided with second guide holes 4652. The shafts 4610 of the two rotating shafts 461 pass through the two first guide holes 4765 and the two second guide holes 4652, respectively. The rotating shafts 461 can rotate in the first guide holes 4765 and the second guide holes 4652. The fixing member 465 and the positioning member 476 can only slide along the axial direction of the two rotating shafts 461. The fixing member 465 has two spaced first shaft holes 4654 between two second guide holes 4652 in its middle part, and the axis of the second guide holes 4652 is parallel to the axis of the first shaft holes 4654; two rotating shafts 4644 are rotatably inserted into the first shaft holes 4654 respectively. The fixing member 465 has a positioning part 4656 on the side facing the connecting rod 462. The connecting rod 462 includes a first limiting surface 4626 and a second limiting surface 4627; when the two connecting rods 462 are in a fully folded state relative to the base 44, the positioning part 4656 abuts against the first limiting surface 4626; when the two connecting rods 462 are in a flattened state relative to the base 44, the positioning part 4656 abuts against the second limiting surface 4627. Specifically, the first sleeve 4622 has a notch around the socket 4624 at one end opposite to the first cam 460. A first limiting surface 4626 and a second limiting surface 4627 are the opposite end faces of this notch, with the first limiting surface 4626 further away from the guide rail 4620 than the second limiting surface 4627. The positioning part 4656 is a positioning block. A positioning rod 4657 is provided on the side of the fixing member 465 opposite to the positioning part 4656, and the positioning rod 4657 is used for positioning on the base 44. The opposite end faces of the fixing member 465 are arc surfaces.

[0064] Optionally, each link 462 includes a first cam 460 rotatably fitted onto a corresponding rotation shaft 461, and the abutment 473 includes two second cams 4730 located at opposite ends thereof. The two second cams 4730 are slidably fitted onto the two rotation shafts 461 respectively, wherein one second cam 4730 slidably abuts against one abutting surface 4601, and the other second cam 4730 slidably abuts against the other abutting surface 4601. Specifically, the abutment 473 includes a second sleeve 4732, which is slidably fitted onto the rotation shaft 461 along the axial direction of the rotation shaft 461. The second cam 4730 is disposed on the second sleeve 4732. Specifically, the second cam 4730 is disposed on the end of the second sleeve 4732 facing the link 562, and the second cam 4730 and the second sleeve 4732 are coaxial. In this embodiment, the abutment 473 includes two second cams 4730 located at opposite ends, and a connecting portion 4734 connecting the two second cams 4730. The axes of the two second sleeves 4732 are parallel and spaced apart. The two second cams 4730 are respectively located on the same side of the two second sleeves 4732. The two second cams 4730 are slidably sleeved on two rotating shafts 461. The rotating shafts 461 can rotate relative to the abutment 473, and the abutment 473 can slide along the axial direction of the rotating shafts 461. One second cam 4730 slidably abuts against one abutting surface 4601, and the other second cam 4730 slidably abuts against the other abutting surface 4601. The second cam 4730 includes two second protrusions 4731, which are arranged circumferentially along the corresponding second sleeves 4732. Each second protrusion 4731 has a sliding surface 4733 at its end facing the first cam 460. Preferably, the two second protrusions 4731 of the second cam 4730 are evenly spaced along the circumference of the corresponding second sleeve 4732. The abutment 473 is provided with a second shaft hole 4736. Specifically, the connecting part 4734 is provided with two second shaft holes 4736, and the axis of the second shaft hole 4736 is parallel to the axis of the second cam 4730. The two opposite ends of the rotating shaft 4644 of the linkage gear 4642 pass through the first shaft hole 4654 and the second shaft hole 4736, respectively.

[0065] In this embodiment, the elastic element 475 includes a spring sleeved on each rotating shaft 461, and the elastic element 475 is located between the positioning element 476 and the supporting element 473. The positioning element 476 includes a rectangular guide plate 4761 and an extension 4763 provided in the middle of one side of the guide plate 4761; the guide plate 4761 has first guide holes 4765 at opposite ends, and the opposite end faces of the guide plate 4761 are arc surfaces. The extension direction of the extension 4763 is parallel to the axis of the first guide hole 4765, and the end face of the extension 4763 away from the guide plate 4761 has two clearance holes 4767. Preferably, the side of the guide plate 4761 away from the extension 4763 is provided with a first anti-slip part 4768 around the first guide hole 4765. Specifically, the first anti-slip part 4768 may be, but is not limited to, a protrusion, hole, or rough surface provided on the guide plate 4761.

[0066] The friction assembly 477 includes a first friction element 4770 connected to the rotating shaft 461, which abuts against the positioning element 476. When the rotating shaft 461 rotates relative to the base 44, the first friction element 4770 rotates with the rotating shaft 461, and there is frictional resistance between the first friction element 4770 and the positioning element 476. Specifically, the first friction element 4770 is a circular friction plate with a first positioning hole 4772 in its center. The first friction element 4770 is fixedly connected to the rotating shaft 461 through the first positioning hole 4772. Second anti-slip portions 4774 are respectively provided on opposite sides of the first friction element 4770. The second anti-slip portions 4774 can be, but are not limited to, protrusions, holes, or rough surfaces. In some embodiments, the first anti-slip portion 4768 on the positioning member 476 may be omitted, and only the second anti-slip portion 4774 on the side of the first friction member 4770 facing the positioning member 476 may be retained; or the second anti-slip portion 4774 on the side of the first friction member 4770 facing the positioning member 476 may be omitted, and only the first anti-slip portion 4768 on the positioning member 476 may be retained.

[0067] The friction assembly 477 also includes a washer 478 sleeved on the rotating shaft 461. The first friction member 4770 is located between the washer 478 and the positioning member 476. When the first friction member 4770 rotates with the rotating shaft 461, there is frictional resistance between the first friction member 4770 and the positioning member 476, and between the first friction member 4770 and the washer 478. Specifically, the washer 478 is rectangular, and its opposite ends are respectively provided as arc surfaces. The opposite sides of the washer 478 are respectively provided with third anti-slip portions 4784. In this embodiment, the opposite ends of the washer 478 are respectively provided with through holes 4782, and the opposite sides of the washer 478 are provided with third anti-slip portions 4784 around each through hole 4782. The third anti-slip portion 4784 can be a protrusion, a hole, or a rough surface, etc.

[0068] In some embodiments, the third anti-slip portion 4784 on the side of the pad 478 facing the first friction member 4770 can be omitted, and only the second anti-slip portion 4774 on the side of the first friction member 4770 facing the pad 478 is retained; or the second anti-slip portion 4774 on the side of the first friction member 4770 facing the pad 478 can be omitted, and only the third anti-slip portion 4784 on the side of the pad 478 facing the first friction member 4770 is retained.

[0069] The friction assembly 477 further includes a second friction element 4775 connected to the rotating shaft 461, with a pad 478 abutting against the second friction element 4775. When the second friction element 4775 rotates with the rotating shaft 461, there is frictional resistance between the second friction element 4775 and the pad 478. Specifically, the second friction element 4775 is a circular friction plate, and a second positioning hole 4776 is formed in the middle of the second friction element 4775. The second friction element 4775 is fixedly connected to the rotating shaft 461 through the second positioning hole 4776. The two opposite sides of the second friction element 4775 are respectively provided with a fourth anti-slip portion 4778, which can be, but is not limited to, a protrusion, a hole, or a rough surface. In this embodiment, the two opposite sides of the second friction element 4775 are respectively provided with several holes, which can increase the frictional resistance of the second friction element 4775.

[0070] In some embodiments, the third anti-slip portion 4784 on the side of the pad 478 facing the second friction member 4775 is omitted, and only the fourth anti-slip portion 4778 on the side of the second friction member 4775 facing the pad 478 is retained; or the fourth anti-slip portion 4778 on the side of the second friction member 4775 facing the pad 478 can be omitted, and only the third anti-slip portion 4784 on the side of the pad 478 facing the second friction member 4775 is retained.

[0071] The limiting mechanism 47 also includes two C-shaped buckles 4779, which are used to engage with the slots 4616 of the rotating shaft 461.

[0072] Please refer to the following: Figures 6-14 and Figures 16-20When assembling the folding aid assembly 41, the ends of the two rotating shafts 461 away from the connecting cap 4612 are respectively inserted into the two second guide holes 4652 of the fixing member 465 until the fixing member 465 stops at the connecting cap 4612; the gear set 464 is placed between the two connecting rods 462, so that the two linkage gears 4642 respectively mesh with the two driving gears 4621; the ends of the two rotating shafts 461 with slots 4616 are respectively inserted into the sleeve holes 4624 of the two first sleeves 4622 from the end away from the first cam 460, and the two rotating shafts 4644 of the gear set 464 are respectively inserted into the two first shaft holes 4654 of the fixing member 465, and the positioning part 4656 is accommodated in the notch of the corresponding first sleeve 4622; at this time, each positioning part 4656 is located between the corresponding first limiting surface 4626 and the second limiting surface 4627. Two second sleeves 4732 of the abutment member 473 are respectively sleeved onto the shaft bodies 4610 of the two rotating shafts 461. The first cam 460 and the second cam 4730 on the same rotating shaft 461 are coaxial. The two second cams 4730 of the abutment member 473 are respectively rotatably engaged with the two first cams 460. The two rotating shafts 4644 are respectively inserted into the two second shaft holes 4736 of the abutment member 473, that is, the ends of the rotating shafts 4644 protrude from the side of the abutment member 473 away from the fixing member 465. Two elastic members 475 are respectively sleeved onto the two shaft bodies 4610. The ends of the two rotating shafts 461 with slots 4616 are respectively inserted into the two first guide holes 4765 of the positioning member 476. The two rotating shafts 4644 are respectively inserted into the two clearance holes 4767 of the positioning member 476, so that the elastic member 475 is clamped between the supporting member 473 and the positioning member 476; the two first friction members 4770 are respectively sleeved on the two rotating shafts 461, the gasket 478 is sleeved on the two rotating shafts 461, and the two second friction members 4775 are respectively sleeved on the two rotating shafts 461. At this time, the gasket 478 is located between the first friction member 4770 and the second friction member 4775, and the corresponding second friction member 4775 is exposed on the side away from the positioning member 476 in the slot 4616 of each rotating shaft 461; then the two C-shaped buckles 4779 are respectively snapped into the slots 4616 of the two rotating shafts 461. At this time, the two C-shaped buckles 4779 abut against the sides of the two second friction members 4775 away from the positioning member 476, the elastic member 475 is in a compressed state, and the opposite ends of the elastic member 475 abut against the holding member 473 and the positioning member 476 respectively. The second cam 4730 abuts against the first abutting section 4602 of the corresponding abutting surface 4601, so that the two connecting rods 462 remain flat.The first rotating parts 452 of the two rotating parts 450 are respectively housed in the two receiving slots 440 of the base 44, so that the two arc rails 4522 of each first rotating part 452 are respectively inserted into the corresponding two arc slots 442; the linkage mechanism 46 and the limiting mechanism 47 are placed between the two connecting parts 455, and the guide rails 4620 of the two connecting rods 462 are slidably inserted into the guide slots 4550 of the two connecting parts 455, and the two connecting caps 4612, the two rotating shafts 4644 and the positioning rod 4657 are respectively inserted into the two transition holes 445, the two connecting holes 446 and the fixing hole 447.

[0073] When the folding aid assembly 41 is bent from its flattened state, one of the rotating mechanisms 45 is bent relative to the base 44 toward the other rotating mechanism 45. The arc rail 4522 of the rotating member 450 rotates in the corresponding arc groove 442, and the guide rail 4620 of the connecting rod 462 slides in the corresponding guide groove 4550. The connecting member 455 drives one of the connecting rods 462 to bend relative to the abutment member 473 toward the other connecting rod 462. The connecting rod 462 rotates along the axis of the corresponding rotating shaft 461, thereby driving the corresponding rotating shaft 461, the drive gear 4621, and the first cam 460 to rotate along the axis of the rotating shaft 461. The rotating shaft 461 rotates in the first guide hole 4765 corresponding to the positioning member 476, the second guide hole 4652 corresponding to the fixing member 465, and the through hole 4782 corresponding to the shim 478. The rotating drive gear 4621 drives the other drive gear 4621 to rotate through the gear set 464. The rotation of the other drive gear 4621 drives the corresponding rotating shaft 461, the first sleeve 4622, the first cam 460, and the connecting rod 4623 to rotate, thereby causing the two connecting rods 462 of the linkage mechanism 46 to move closer to each other synchronously, and the two rotating mechanisms 45 to move closer to each other synchronously. At the same time, each second cam 4730 slides from the first abutting section 4602 through the hovering section 4603 to the second abutting section 4604 on the corresponding abutting surface 4601. The holding member 473 slides along the axial direction of the rotating shaft 461 and squeezes the elastic member 475. The elastic member 475 elastically pushes against the positioning member 476, so that the first friction member 4770 is clamped between the gasket 478 and the positioning member 476, and the second friction member 4775 is clamped between the gasket 478 and the C-shaped buckle 4779. The first friction member 4770 and the second friction member 4775 rotate with the corresponding rotating shaft 461 relative to the positioning member 476 and the gasket 478.

[0074] In other applications, the two rotating mechanisms 45 can rotate together in opposite directions, causing them to rotate relative to the base 44 and move closer together. The two rotating mechanisms 45 drive the two connecting rods 462 to rotate together in opposite directions. Each connecting rod 462 rotates along the axis of its corresponding rotating shaft 461, thereby driving the corresponding rotating shaft 461, the drive gear 4621, and the first cam 460 to rotate along the axis of that rotating shaft 461. The two drive gears 4621 together drive the two linkage gears 4642 to rotate, thus causing the two connecting rods 462 to move closer together synchronously. Simultaneously, each... The first cam 460 on the connecting rod 462 rotates relative to the corresponding second cam 4730, causing each second cam 4730 to slide from the first abutting section 4602 through the hovering section 4603 to the second abutting section 4604 on the corresponding abutting surface 4601. The holding member 473 slides along the axial direction of the rotation shaft 461 and presses the elastic member 475. The elastic member 475 elastically pushes against the positioning member 476, causing the first friction member 4770 and the second friction member 4775 to be clamped. The first friction member 4770 and the second friction member 4775 rotate relative to the positioning member 476 and the pad 478 along with the corresponding rotation shaft 461.

[0075] When the folding aid assembly 41 unfolds from the folded state, the two elastic members 475 elastically push against the two second sleeves 4732 respectively, causing the second cam 4730 to slide against the corresponding abutting surface 4601. Since there is an unfolding force between the second cam 4730 and the second abutting section 4604 to the suspension section 4603 of the corresponding abutting surface 4601, which drives the connecting rod 462 to rotate relative to the abutting member 473 and unfold, this unfolding force can drive the two connecting rods 462 to rotate synchronously and automatically relative to the abutting member 473 and move away from each other. The two connecting rods 462 respectively drive the two rotating members to rotate. Mechanism 45 rotates synchronously relative to base 44 and moves away from each other. Each second cam 4730 automatically slides from the second abutment section 4604 to the hovering section 4603 on the corresponding abutment surface 4601. Each link 462 drives the corresponding rotating shaft 461 to rotate. The rotating shaft 461 rotates in the corresponding second guide hole 4652, the inner cavity of the second sleeve 4732, the first guide hole 4765, and the through hole 4782, and drives the corresponding first friction member 4770 and second friction member 4775 to rotate, so that the folding aid assembly 41 automatically unfolds from the fully folded state to the hovering state. The folding aid assembly 41 is then unfolded further, so that the second cam 4730 slides from the hovering section 4603 to the first abutment section 4602. The two links 462 rotate relative to the abutment member 473 and continue to move away from each other until the second cam 4730 is positioned at the first abutment section 4602, so that the folding aid assembly 41 unfolds from the hovering state to the flattened state.

[0076] like Figures 3-5As shown, when assembling the folding aid assembly 41 to the bendable assembly 42, the two side supports 423 are placed on opposite sides of the base 44. The two rotating rails 4556 of each connector 455 are rotatably accommodated in the corresponding pair of rotating slots 4234, and the adjusting shaft 4628 of the connecting rod 462 is inserted into the corresponding adjusting slot 4237. The middle support 421 is placed on the base 44, so that the first support plate 4210 is located between the two side supports 423, and the two first connecting areas 4212 are respectively connected to the two folding aid assemblies 41. Then, the back cover 4218 is connected to the back of the base 44. The rotation axis between the rotating member 450 and the base 44 is parallel to the axis of the rotating shaft, and the rotation axis between the rotating member 450 and the connector 455 is parallel to the axis of the rotating shaft. When the two side supports 423 are in a flattened state, the adjusting shaft 4628 is positioned in the second positioning section 4237b of the corresponding adjusting groove 4237, the positioning part 4656 abuts against the second limiting surface 4627, and the second cam 4730 is positioned in the corresponding first abutting section 4602, so that the folding device 40 remains in a flattened state, and the front faces of the two side supports 423 and the middle support 421 are coplanar, preventing the side supports 423 from bending relative to the middle support 421. When the two side supports 423 are in a folded state, the adjusting shaft 4628 is located in the first positioning section 4237a of the corresponding adjusting groove 4237, the positioning part 4656 abuts against the first limiting surface 4626, and the front faces of the two side supports 423 and the middle support 421 form a teardrop shape, preventing the side supports 423 from bending further relative to the middle support 421.

[0077] Please refer to the following: Figures 1-4The assembled folding device 40 is placed between two frames 21, and the connecting pieces 455 on opposite sides of the folding device 40 are fixedly connected to the two frames 21 respectively. When the folding shell is fully folded, the first magnetic 211 and the second magnetic 213 attract each other. The attraction force between the first magnetic 211 and the second magnetic 213 is greater than or equal to the unfolding force between the second cam of the folding device 40 and the abutting surface 4601, so that the folding shell remains fully folded. When the two frames 21 unfold to the point where there is no attraction force between the first magnetic 211 and the second magnetic 213, the unfolding force between the second cam 4730 and the abutting surface 4601 drives the second abutting section 4604 of the second cam 4730 on the abutting surface 4601 to automatically slide to the hovering section 4603, so that the connecting rod 462 rotates automatically relative to the base 44, so that the two frames 21 rotate relative to each other and automatically unfold to the hovering state, thereby realizing the automatic unfolding of the folding shell from the fully folded state to the hovering state. When the folded shell is in a flattened state, the front faces of the two frames 21, the front face of the central support 421, and the front faces of the two side supports 423 are coplanar. The bendable area 31 of the flexible screen 30 is connected to the front face of the folding device 40, and the two non-bendable areas 33 are respectively connected to the front faces of the two frames 21. When the flexible screen 30 is in a flattened state, the second cam 4730 abuts against the corresponding first abutting section 4602, and the elastic member 475 has a pre-elastic force to push against the holding member 473 and the positioning member 476 to limit the bendable assembly 42 to remain in a flattened state. The included angle between the two connecting members 462 is 180 degrees.

[0078] Please refer to the following: Figures 1-4 and Figures 21-24When bending the electronic device 100, a bending force is applied to at least one of the two frames 21 of the electronic device 100, causing the rotating mechanism 45 connected to the two frames 21 to rotate in the direction of mutual approach. The bending of the folding device 40 is achieved through the two folding aid components 41, and the bendable area 31 of the flexible screen 30 bends with the bendable component 42. Specifically, if a bending force is applied to one of the frame bodies 21, the frame body 21 will cause the corresponding rotating mechanism 45 to rotate relative to the base 44 towards the side closer to the flexible screen 30. This will cause the corresponding connecting rod 462 to rotate relative to the base 44 towards the side closer to the flexible screen 30 along the axis of the rotating shaft 461. At the same time, the guide rail 4620 of the connecting rod 462 slides in the guide groove 4550 of the corresponding connector 455. The first sleeve 4622, rotating shaft 461, drive gear 4621, and first cam 460 of the connecting rod 462 rotate along the axis of the corresponding rotating shaft 461. The rotating drive gear 4621 drives another drive gear 4621 to rotate through the gear set 464. The rotation of the other drive gear 4621 drives the corresponding rotating shaft 461, first sleeve 4622, first cam 460, and connecting rod 4623 to rotate. The movement causes the two connecting rods 462 of the linkage mechanism 46 to move closer to each other synchronously. At the same time, the first cam 460 on each connecting rod 462 rotates and pushes against the corresponding second cam 4730, causing the second cam 4730 to slide from the first abutting section 4602 through the hovering section 4603 to the second abutting section 4604 on the corresponding abutting surface 4601. The holding member 473 slides along the axial direction of the rotation shaft 461 and squeezes the elastic member 475. The opposite ends of the elastic member 475 elastically push against the holding member 473 and the positioning member 476 respectively. The first friction member 4770 is clamped between the gasket 478 and the positioning member 476, and the second friction member 4775 is clamped between the gasket 478 and the C-shaped buckle 4779. The first friction member 4770 and the second friction member 4775 rotate relative to the gasket 478 and the positioning member 476 with the corresponding rotation shaft 461. During the bending process of the linkage mechanism 46, the first rotating part 452 of the rotating part 450 rotates relative to the base 44 through the cooperation of the arc rail and the corresponding arc groove. The second rotating part 453 of the rotating part 450 is rotatably connected to the corresponding connecting part 455 along the corresponding connecting shaft 451. The adjusting shaft 4628 rotates from the second positioning section 4237b and slides to the first positioning section 4237a in the corresponding adjusting groove 4237. The two connecting rods 462 rotate along the axis of the corresponding rotating shaft 461 and move closer to each other to realize the mutual approach of the two side support members 423, so that the folding device 40 is in a bent state. The bendable area 31 of the flexible screen 30 bends with the folding device 40 until the first magnetic suction member 211 and the second magnetic suction member 213 on the two frames 21 attract each other, and the bendable area 31 is bent into a teardrop shape.At this time, the attraction force between the first magnetic 211 and the second magnetic 213 is greater than or equal to the sum of the unfolding force between the second cam 4730 of the folding device 40 and the abutting curved surface 4601 and the rebound force of the bendable area 31, so that the electronic device 100 remains in a fully folded state.

[0079] In other bending methods of the electronic device 100, bending forces can be applied to both frames 21 at the same time. The two frames 21 respectively drive the two side support members 423 to rotate relative to the side closer to the flexible screen 30, and the bending of the electronic device 100 is achieved through the folding device 40.

[0080] Please refer to the following: Figures 1-4 and Figures 25-29 When the electronic device 100 needs to be flattened, the user can use one hand to pull the two frames 21 apart until there is no attraction between the first magnetic 211 and the second magnetic 213. The elastic element 475 elastically pushes against the corresponding second sleeve 4732. The unfolding force between the second cam 4730 and the abutting curved surface 4601 and the rebound force of the bendable area 31 together drive the folding device 40 to automatically unfold from the fully folded state to the hovering state, so that the two frames 21 automatically unfold to the hovering state. Specifically, the unfolding force and the rebound force together drive the two connecting rods 462 of each folding aid component 41 relative to the base 44. As the two cams rotate and move away from each other, each second cam 4730 automatically slides from the second abutment section 4604 to the hovering section 4603 on the corresponding abutment surface 4601. The two drive gears 4621 rotate relative to the gear set 464, causing the two connecting rods 462 to automatically rotate and move away from each other along the axis of the corresponding rotation shaft 461, so as to realize the mutual separation of the two side support members 423, so that the folding device 40 automatically unfolds to the hovering state, the two frames 21 unfold to each other, and the bendable area 31 of the flexible screen 30 unfolds with the folding device 40 until the flexible screen 30 is flattened to the hovering state. As the user continues to unfold the electronic device 100, each second cam 4730 slides from the hovering section 4603 to the first abutting section 4602 on the corresponding abutting surface 4601. The two drive gears 4621 rotate relative to the gear set 464, causing the two connecting rods 462 to continue rotating along the axis of the corresponding rotation shaft 461 and further move away from each other, so as to further move away from each other of the two side support members 423, so that the folding device 40 unfolds to the flattened state, the two frames 21 unfold to the flattened state, and the bendable area 31 of the flexible screen 30 unfolds further with the folding device 40 until the flexible screen 30 unfolds to the flattened state.

[0081] During the flattening process of the electronic device 100, the unfolding force between the second cam 4730 and the abutting surface 4601 and the rebound force of the bendable area 31 enable the electronic device 100 to automatically unfold from the fully folded state to the hovering state; the second cam 4730 automatically slides from the second abutting section 4604 to the hovering section 4603 on the corresponding abutting surface 4601.

[0082] The folding device 40 of the electronic device 100 of the present invention can be synchronously and automatically unfolded to a hovering state by the unfolding force between the second cam 4730 of the folding aid component 41 and the abutting curved surface 4601 and the rebound force of the bendable area 31. The user can automatically flatten the electronic device 100 to a hovering state with one hand, which is convenient to use and improves the user experience. Secondly, since the overall volume of the folding device 40 is small, the internal space occupied by the folding device 40 in the folding shell 20 is reduced, which is not only beneficial to the layout of other components such as the motherboard or battery in the electronic device 100, but also conducive to miniaturization.

[0083] The above are the embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the embodiments of the present invention, and these improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A folding device, characterized in that, The folding device comprises: a base; a rotating shaft connected to the base; a connecting rod rotatably connected to the rotating shaft relative to the base; a bearing member slidingly connected to the rotating shaft along the axial direction of the rotating shaft; and a resilient member for pushing the bearing member against the connecting rod; wherein the connecting rod and the bearing member are connected through the cooperation of a first cam and a second cam, the first cam has an abutting curved surface, the second cam is slidingly abutted against the abutting curved surface, the abutting curved surface comprises a first abutting section and a second abutting section at opposite ends thereof, and a hovering section connected between the first abutting section and the second abutting section, the second cam is abutted against the first abutting section when the folding device is in an unfolded state, the second cam is abutted against the second abutting section when the folding device is in a fully folded state, and the second cam is abutted against the hovering section when the folding device is in a hovering state.

2. The folding device of claim 1, wherein The second cam is automatically slid from the second abutting section to the hovering section under the pushing force of the resilient member, so that the connecting rod rotates relative to the base, and the folding device is automatically unfolded from the fully folded state to the hovering state.

3. The folding device of claim 2, wherein The first abutting section and the second abutting section are closer to the bearing member relative to the hovering section, the first abutting section and the hovering section are circularly arc transitioned, and the second abutting section and the hovering section are circularly arc transitioned.

4. The folding device of claim 1, wherein During the automatic sliding of the second cam from the second abutting section to the hovering section, the folding device is automatically unfolded from the fully folded state to the hovering state, and the second cam and the abutting curved surface have an unfolding force for driving the connecting rod to rotate relative to the base.

5. The folding device of claim 1, wherein The first cam comprises at least one first protruding part, the abutting curved surface is arranged on a side of the first protruding part facing the second cam, the hovering section is an arc surface curved away from the second cam, the second cam comprises at least one second protruding part, the second protruding part has a sliding surface facing the first cam, and the sliding surface is slidingly abutted against the abutting curved surface.

6. The folding apparatus of claim 1, wherein The first cam comprises two first protruding parts arranged along the circumferential direction of the rotating shaft, each first protruding part has the abutting curved surface arranged on an end thereof facing the second cam, the second cam comprises two second protruding parts arranged along the circumferential direction of the rotating shaft, each second protruding part has a sliding surface facing the corresponding first cam, and the two sliding surfaces are respectively slidingly abutted against the two abutting curved surfaces.

7. The folding apparatus of claim 2, wherein The folding device comprises two rotating shafts, two connecting rods and a gear set, each connecting rod comprises a first sleeve connected to a corresponding rotating shaft, each abutting piece comprises a second sleeve which is sleeved on the rotating shaft in the axial direction, the first cam is arranged on the first sleeve, the second cam is arranged on the second sleeve, the first cam and the second cam on the same rotating shaft are coaxial, and the gear set is arranged between the two connecting rods, and the two connecting rods can be synchronously rotated relative to the base through the gear set.

8. The folding device of claim 7, wherein The first abutting section and the second abutting section are farther away from the first sleeve relative to the hovering section, and the hovering section is curved towards the first sleeve.

9. A foldable housing characterized by, The folding shell comprises the folding device according to any one of claims 1-8 and two frame bodies, the folding device is located between the two frame bodies, and opposite sides of the folding device are connected to the two frame bodies respectively, one of the two frame bodies is provided with a first magnetic attraction piece, the other is provided with a second magnetic attraction piece, when the folding shell is in a completely folded state, the first magnetic attraction piece and the second magnetic attraction piece are attracted to each other, when the two frame bodies are relatively unfolded to the state that there is no attractive force between the first magnetic attraction piece and the second magnetic attraction piece, the elastic piece pushes the second cam to slide on the abutting curved surface of the folding device, so that the connecting rod is rotated relative to the base, so that the two frame bodies are unfolded to the hovering state.

10. An electronic device, comprising: The electronic device comprises a flexible screen, two frame bodies and the folding device according to any one of claims 1-8, the folding device is located between the two frame bodies, and opposite sides of the folding device are connected to the two frame bodies respectively, the flexible screen comprises a bendable area arranged on the folding device, one of the two frame bodies is provided with a first magnetic attraction piece, and the other is provided with a second magnetic attraction piece; when the electronic device is folded, the attractive force between the first magnetic attraction piece and the second magnetic attraction piece is greater than or equal to the sum of the unfolding force between the second cam of the folding device and the abutting curved surface and the rebound force of the bendable area, so that the electronic device remains in a completely folded state; when the two frame bodies are unfolded to the state that there is no attractive force between the first magnetic attraction piece and the second magnetic attraction piece, the unfolding force and the rebound force drive the two frame bodies to be unfolded to the hovering state.

Images