Folding device, folding housing and electronic device

Abstract

The application provides a folding device, which comprises a base, connecting shafts, connecting rods, a linkage and a positioning mechanism. A pair of connecting shafts are respectively arranged on opposite sides of the base, and the two connecting shafts are respectively rotationally connected to the two connecting shafts. The linkage is arranged between the two connecting rods and is connected to the connecting shafts. The two connecting rods are connected to the linkage through helical surface cooperation. The positioning mechanism comprises a positioning assembly and an abutting portion that is slidably abutted against the positioning assembly. The positioning assembly is arranged on one of the base and the linkage, and the abutting portion is arranged on the other one of the base and the linkage. When one connecting rod or a pair of connecting rods rotates around the corresponding connecting shaft, the linkage slides along the axial direction of the connecting shaft relative to the base. The two connecting rods are synchronously reversely rotated relative to the base, so that the abutting portion slides relative to the positioning assembly and has a frictional resistance. The frictional resistance is used for positioning the connecting rods relative to the base. The application also provides a folding shell and an electronic device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electronic devices, in particular to a folding device, a folding housing provided with the folding device, and an electronic device provided with the folding housing. BACKGROUND

[0002] With the development of display devices, flexible display screens that can be folded have appeared. Folding screen devices equipped with flexible display screens that can be folded are increasingly popular due to their unique appearance and diversified functions. The flexible display screens of existing folding screen devices are generally supported by folding devices. The folding devices generally only use a combination of springs and cams to adjust the torsion feel of the folding device and to suspend the folding screen device within a specific angle range. However, as the number of folding times of the folding screen device increases, the spring force of the spring will decay or even fatigue and break, and the cam surface will deform due to wear, resulting in a significant decay of the torsion of the rotating shaft and a poor folding feel of the entire machine, which is difficult to meet the requirements of suspension, torsion feel, flatness, or folding stop of the folding screen device. SUMMARY

[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] The folding device provided by the present application comprises:

[0005] a base;

[0006] a pair of connecting shafts, each of which is arranged on opposite sides of the base;

[0007] a pair of connecting rods, each of which is rotatably connected to one of the connecting shafts;

[0008] a linkage member arranged between the two connecting rods and connected to the pair of connecting shafts, the linkage member being capable of sliding relative to the base along the axial direction of the connecting shafts, and the two connecting rods being connected to the linkage member through a helical surface;

[0009] a positioning mechanism comprising a positioning assembly and an abutting portion capable of slidingly abutting against the positioning assembly, the positioning assembly being arranged on one of the base and the linkage member, and the abutting portion being arranged on the other one of the base and the linkage member; when one of the connecting rods or the pair of connecting rods rotates around the corresponding connecting shaft, the linkage member slides relative to the base along the axial direction of the connecting shafts, and the two connecting rods synchronously rotate in opposite directions relative to the base, so that the abutting portion slides relative to the positioning assembly and has a frictional resistance, and the frictional resistance is used for positioning the connecting rods relative to the base.

[0010] The application also provides a folding housing, which comprises a folding device and at least two frame bodies, the folding device comprising a base, connecting shafts, connecting rods, a linkage and a positioning mechanism, one pair of the connecting shafts being arranged on opposite sides of the base; one of the connecting rods is rotatably connected to one of the connecting shafts, and the other connecting rod is rotatably connected to the other connecting shaft; the linkage is arranged between the two connecting rods and is connected to the pair of connecting shafts, the linkage being capable of sliding relative to the base along the axial direction of the connecting shafts, and the two connecting rods being connected to the linkage through helical surface fitting; the positioning mechanism comprises a positioning assembly and an abutting portion which is slidably abutted against the positioning assembly, the positioning assembly being arranged on one of the base and the linkage, and the abutting portion being arranged on the other one of the base and the linkage; when one of the connecting rods or the pair of connecting rods rotates around the corresponding connecting shaft, the linkage slides relative to the base along the axial direction of the connecting shafts, and the two connecting rods reversely rotate relative to the base synchronously, so that the abutting portion slides relative to the positioning assembly and has a frictional resistance, and the frictional resistance is used for positioning the connecting rods relative to the base; the folding device is located between two adjacent frame bodies, and opposite sides of the folding device are connected to the two adjacent frame bodies respectively.

[0011] The application also provides an electronic device, which comprises a flexible screen and a folding housing, the folding housing comprising a folding device and at least two frame bodies, the folding device comprising a base, connecting shafts, connecting rods, a linkage and a positioning mechanism, one pair of the connecting shafts being arranged on opposite sides of the base; one of the connecting rods is rotatably connected to one of the connecting shafts, and the other connecting rod is rotatably connected to the other connecting shaft; the linkage is arranged between the two connecting rods and is connected to the pair of connecting shafts, the linkage being capable of sliding relative to the base along the axial direction of the connecting shafts, and the two connecting rods being connected to the linkage through helical surface fitting; the positioning mechanism comprises a positioning assembly and an abutting portion which is slidably abutted against the positioning assembly, the positioning assembly being arranged on one of the base and the linkage, and the abutting portion being arranged on the other one of the base and the linkage; when one of the connecting rods or the pair of connecting rods rotates around the corresponding connecting shaft, the linkage slides relative to the base along the axial direction of the connecting shafts, and the two connecting rods reversely rotate relative to the base synchronously, so that the abutting portion slides relative to the positioning assembly and has a frictional resistance, and the frictional resistance is used for positioning the connecting rods relative to the base; the folding device is located between two adjacent frame bodies, and opposite sides of the folding device are connected to the two adjacent frame bodies respectively; and the flexible screen is connected to the folding housing.

[0012] The connecting rod of the folding device can rotate around the corresponding connecting shaft, the linkage is located between the two connecting rods and is slidably connected to a pair of connecting shafts, the connecting rod and the linkage are connected through the spiral surface, and the linkage and the base are slidably connected to the abutting part through the positioning assembly; when the connecting rod rotates relative to the base, the linkage slides relative to the base, and the positioning assembly and the abutting part slide against each other and have a frictional resistance, which can meet the hovering effect of the folding device, improve the torsion feel, and meet the flat or folded stop position of the folding device. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings described below relate to some embodiments of the present application. Those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0014] Figure 1 is a perspective structural schematic diagram of an electronic device in one embodiment of the present application;

[0015] Figure 2 is Figure 1 is a perspective structural exploded schematic diagram of the folding shell and the flexible screen of the electronic device in

[0016] Figure 3 is Figure 2 is a perspective structural exploded schematic diagram of the folding shell in

[0017] Figure 4 is Figure 3 is a further perspective structural schematic diagram of the folding shell in

[0018] Figure 5 is Figure 4 is a further perspective structural schematic diagram of the folding device in

[0019] Figure 6 is Figure 5 is a perspective structural schematic diagram of the folding device in another view in

[0020] Figure 7 is Figure 5 is a perspective structural enlarged view of the positioning assembly in

[0021] Figure 8 is Figure 7 is a perspective structural schematic diagram of the positioning assembly in another view in

[0022] Figure 9 is Figure 6is a close-up view of the IX portion in

[0023] Figure 10 is Figure 5 is a close-up view of one of the auxiliary assemblies in

[0024] Figure 11 is Figure 10 is a perspective view of the auxiliary assembly in

[0025] Figure 12 is Figure 10 is an exploded perspective view of the auxiliary assembly in

[0026] Figure 13 is Figure 12 is a perspective view of the auxiliary assembly in

[0027] Figure 14 is Figure 12 is a further exploded perspective view of the auxiliary assembly in

[0028] Figure 15 is Figure 14 is a perspective view of the auxiliary assembly in

[0029] Figure 16 is Figure 14 is a close-up view of the link, linkage and abutting member in

[0030] Figure 17 is Figure 16 is a perspective view of the link, linkage and abutting member in

[0031] Figure 18 is Figure 3 is one of the sectional views of the folding device in

[0032] Figure 19 is Figure 18 is a close-up view of the IX portion in

[0033] Figure 20 is Figure 2 is a perspective view of the folding housing in the intermediate folding state in

[0034] Figure 21 is Figure 20 is a close-up view of the folding device in

[0035] Figure 22 is Figure 21 is one of the sectional views of the folding device in

[0036] Figure 23 is Figure 22an enlarged view of the portion XXIII in Fig. 23;

[0037] Figure 24 is Figure 1 a perspective view of the folded housing in Fig. 23 in a fully folded state;

[0038] Figure 25 is Figure 24 an enlarged perspective view of the folding device in Fig. 23;

[0039] Figure 26 is Figure 25 one of the perspective sectional views of the folding device in Fig. 23;

[0040] Figure 27 is Figure 26 an enlarged view of the portion XXVII in Fig. 23. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the protection scope of the present application.

[0042] In addition, the following description of each embodiment is with reference to the additional drawings to illustrate specific embodiments that can be used to implement the present application. The directional terms mentioned in the present application, such as “up”, “down”, “front”, “back”, “left”, “right”, “inner”, “outer”, “side” and the like, are only the directions of the additional drawings, therefore, the directional terms used are for better, clearer illustration and understanding of the present application, and are not indicative or implied that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0043] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting”, “arranged on” should be understood broadly, for example, can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0044] Please refer to Figures 1-6The electronic device 100 in one of the embodiments of the present application comprises a folding shell 20 and a flexible screen 50 connected to the folding shell 20, and the flexible screen 50 can be folded or unfolded along with the folding shell 20. The folding shell 20 comprises at least two frames 21 and a folding device 22 connected between the at least two frames 21, the folding device 22 is located between two adjacent frames 21, and the opposite sides of the folding device 22 are connected to the two frames 21 respectively, and the two frames 21 are folded or unfolded through the folding device 22. The folding device 22 comprises a base 23, an assisting assembly, and a supporting mechanism 24, the assisting assembly comprises connecting shafts 260, connecting rods 261, a linkage 27, rotating mechanisms 25, and a positioning mechanism 28, and the opposite sides of the base 23 are respectively provided with the connecting shafts 260; one of the connecting rods 261 is rotatably connected to one of the connecting shafts 260, and the other connecting rod 261 is rotatably connected to the other connecting shaft 260; the linkage 27 is arranged between the two connecting rods 261, and the linkage 27 is connected to a pair of the connecting shafts 260, the linkage 27 can slide along the axial direction of the connecting shaft 260 relative to the base 23, and the two connecting rods 261 are connected with the linkage 27 through the spiral surface fitting, when one of the connecting rods 261 or the two connecting rods 261 rotates around the corresponding connecting shaft 260, the linkage 27 slides along the axial direction of the connecting shaft 260, so as to drive the two connecting rods 261 to rotate synchronously relative to the base 23 and fold or unfold each other, that is, the linkage 27 can slide in a first direction or a second direction, so as to drive the two connecting rods 261 to rotate synchronously relative to the base 23 and fold or unfold each other. It should be noted that the first direction is opposite to the second direction, and the first direction and the second direction are parallel to the axial direction of the connecting shaft 260. The two rotating mechanisms 25 are rotatably connected to the opposite sides of the base 23, and the ends of the two connecting rods 261 away from the base 23 are slidably connected to the two rotating mechanisms 25 respectively, and the first rotating axis of the rotating mechanism 25 is parallel to the axial direction of the connecting shaft 260; the positioning mechanism 28 comprises a positioning assembly 281 and an abutting part 285 movably abutting against the positioning assembly 281, the positioning assembly 281 is arranged on one of the base 23 and the linkage 27, and the abutting part 285 is arranged on the other one of the base 23 and the linkage 27; when one of the connecting rods 261 or the two connecting rods 261 rotates around the corresponding connecting shaft 260, the linkage 27 slides along the axial direction of the connecting shaft 260 relative to the base 23, and the two connecting rods 261 reversely rotate synchronously relative to the base 23, so that the abutting part 285 slides relative to the positioning assembly 281 and has a frictional resistance, and the frictional resistance is used for positioning the connecting rods 261 relative to the base 23, that is, the frictional resistance can hinder the rotation of the frames 21 and the connecting rods 261 relative to the base 23.

[0045] The flexible screen 50 comprises a bendable area 51 corresponding to the folding device 22, and two non-bendable areas 53 connected to opposite sides of the bendable area 51. The flexible screen 50 is arranged on the front surface of the two frame bodies 21 and the front surface of the folding device 22, in particular, the two non-bendable areas 53 of the flexible screen 50 are fixedly connected to the front surfaces of the two frame bodies 21 respectively, and the bendable area 51 is attached to the front surface of the folding device 22. The bendable area 51 of the flexible screen 50 can be bent or flattened along with the folding device 22. The flexible screen 50 can be, but is not limited to, a flexible display screen, a flexible touch screen, a flexible touch display screen, and various flexible components with corresponding functions, or a flexible component fixedly attached to a flexible support plate, such as a flexible display screen, a flexible touch screen, and the like, attached to a flexible steel plate. The front surface refers to a surface with the same direction as the light-emitting surface of the flexible screen 50, and the back surface refers to a surface with the opposite direction of the light-emitting surface of the flexible screen 50. The electronic device 100 is, for example, but not limited to, a mobile phone, a tablet computer, a display, a liquid crystal panel, an OLED panel, a television, a smart watch, a VR head-mounted display, a vehicle-mounted display, and other any product and component with display function.

[0046] The connecting rod 261 of the folding device 22 can rotate around the corresponding connecting shaft 260, the linkage 27 is located between the two connecting rods 261 and is slidably connected to the pair of connecting shafts 260 in the axial direction of the connecting shaft 260, the connecting rod 261 and the linkage 27 are connected through the spiral surface, the linkage 27 and the base 23 are slidably abutted through the positioning assembly 281 and the abutting part 285, the end of the connecting rod 261 away from the base 23 is slidably connected to the corresponding rotating mechanism 25, the rotating mechanism 25 is rotatably connected to the base 23, and the frame body 21 is connected to the end of the rotating mechanism 25 away from the base 23; when the frame body 21 and the connecting rod 261 rotate relative to the base 23 along with the rotating mechanism 25, the positioning assembly 281 and the abutting part 285 abut each other with frictional resistance, which can meet the hovering effect of the folding shell 20, improve the torsion feeling, and meet the flattened or folded stop position of the folding shell 20.

[0047] As Figures 2-4As shown, the frame 21 comprises a front face 211, a back face 213, two opposite side faces 214 and two end faces 215, the folding device 22 is connected between the two adjacent side faces 214 of the two frames 21, the bendable area 51 of the flexible screen 50 is attached to the front face of the folding device 22, and the non-bendable area 53 of the flexible screen 50 is connected to the front face 211 of the frame 21. The front face 211 of each frame 21 is provided with a mounting groove 216 near the side of the folding device 22, the mounting groove 216 penetrates through the front face 211 of the frame 21, and the two opposite ends of the mounting groove 216 respectively extend to the two opposite end faces 215 of the frame 21. The two opposite sides of the folding device 22 are respectively accommodated in the mounting grooves 216 of the two frames 21, and the two rotating mechanisms 25 on the two opposite sides of each assisting assembly away from the base 23 are respectively connected to the mounting grooves 216 of the two frames 21. Specifically, the frame 21 is provided with a plurality of connecting holes 217 on the bottom surface of the mounting groove 216, and a plurality of locking members are respectively connected to the side of the rotating mechanism 25 away from the base 23 through the plurality of connecting holes 217; the back face of the frame 21 is provided with a plurality of accommodation spaces (not shown in the figure), which are used for mounting electronic devices such as circuit boards and batteries.

[0048] As Figures 3-9As shown, the positioning assembly 281 comprises a positioning member 282, which comprises a first positioning surface 2822 and a second positioning surface 2824, and the first positioning surface 2822 and the second positioning surface 2824 are arranged on opposite sides of the positioning member 282 along the sliding direction of the linkage 27 relative to the base 23; the abutting portion 285 comprises a first abutting surface 2852 and a second abutting surface 2854 located on opposite sides thereof, when the pair of linkage members 261 is in the unfolded state relative to the base 23, the first positioning surface 2822 is attached to the first abutting surface 2852; when the pair of linkage members 261 is in the fully folded state relative to the base 23, the second positioning surface 2824 is attached to the second abutting surface 2854. In the embodiment, the positioning member 282 is arranged on the side of the base 23 facing the linkage 27, and the abutting portion 285 is arranged on the side of the linkage 27 facing the base 23, and the abutting portion 285 can abut the positioning member 282 slidingly relative to the base 23, so that the first positioning surface 2822 can be attached to the first abutting surface 2852 or the second positioning surface 2824 can be attached to the second abutting surface 2854; that is, when the two frame bodies 21 are in the unfolded state, the first positioning surface 2822 of the positioning member 282 is attached to the first abutting surface 2852 of the abutting portion 285, so that the two frame bodies 21 are kept in the unfolded state; when the two frame bodies 21 are in the fully folded state, the second positioning surface 2824 of the positioning member 282 is attached to the second abutting surface 2854 of the abutting portion 285, so that the two frame bodies 21 are kept in the fully folded state. The unfolded state refers to the front surfaces 211 of the two frame bodies 21 being coplanar, that is, the included angle between the two front surfaces 211 is 180 degrees; the fully folded state refers to the front surfaces 211 of the two frame bodies 21 being parallel to each other, that is, the included angle between the two front surfaces 211 is 0 degrees.

[0049] In other embodiments, the positioning member 282 is arranged on the side of the linkage 27 facing the base 23, and the abutting portion 285 is arranged on the side of the base 23 facing the linkage 27.

[0050] Optionally, the positioning member 282 further comprises a third positioning surface 2826 connected between the first positioning surface 2822 and the second positioning surface 2824, and the abutting portion 285 further comprises a third abutting surface 2856 connected between the first abutting surface 2852 and the second abutting surface 2854; when a pair of the connecting rod members 261 is in the intermediate folding state relative to the base 23, the third positioning surface 2826 is in abutment with the third abutting surface 2856, that is, when the two frame bodies 21 are in the intermediate folding state relative to the base 23, the third positioning surface 2826 is in abutment with the third abutting surface 2856. Specifically, when the two frame bodies 21 are in the intermediate folding state, the third abutting surface 2856 of the abutting portion 285 on the linkage member 27 is in abutment with the third positioning surface 2826 of the positioning assembly 281, so that the two frame bodies 21 are kept in the intermediate folding state. The intermediate folding state refers to an included angle between the front surfaces 211 of the two frame bodies 21 being greater than 0 degrees and less than 180 degrees.

[0051] Specifically, the positioning member 282 comprises a positioning block 2820 and two connecting columns 2828, the positioning block 2820 comprises a front surface and a back surface 2821, and the two connecting columns 2828 are connected to the back surface 2821 at intervals; the first positioning surface 2822, the second positioning surface 2824 and the third positioning surface 2826 enclose the front surface. The third positioning surface 2826 is parallel to a plane in which the axes of the pair of connecting shafts 260 lie, and the first positioning surface 2822 and the second positioning surface 2824 are both inclined relative to the third positioning surface 2826; in this embodiment, the third positioning surface 2826 is parallel to the back surface 2821 of the positioning block 2820, the first positioning surface 2822 and the second positioning surface 2824 are located on opposite sides of the positioning block 2820, and the third positioning surface 2826 is connected between the first positioning surface 2822 and the second positioning surface 2824; a first intersection between the first positioning surface 2822 and the third positioning surface 2826 is farther away from the back surface 2821 than a side of the first positioning surface 2822 away from the third positioning surface 2826, and a second intersection between the second positioning surface 2824 and the third positioning surface 2826 is farther away from the back surface 2821 than a side of the second positioning surface 2824 away from the third positioning surface 2826. Optionally, the first intersection between the first positioning surface 2822 and the third positioning surface 2826 is a circular-arc transition surface, and the second intersection between the second positioning surface 2824 and the third positioning surface 2826 is a circular-arc transition.

[0052] As Figure 9 and Figure 10As shown, the abutting top 285 is a trapezoidal protrusion on the side of the linkage 27 facing the base 23, the first abutting surface 2852 and the second abutting surface 2854 are respectively located on the opposite sides of the trapezoidal protrusion, and the third abutting surface 2856 is connected between the first abutting surface 2852 and the second abutting surface 2854; the third abutting surface 2856 is parallel to the third positioning surface 2826, the first abutting surface 2852 and the second abutting surface 2854 are both inclined relative to the third abutting surface 2856, the first abutting surface 2852 is parallel to the first positioning surface 2822, and the second abutting surface 2854 is parallel to the second positioning surface 2824; specifically, one side of the first abutting surface 2852 is connected to the third abutting surface 2856, and the opposite side of the first abutting surface 2852 is connected to the back of the linkage 27; one side of the second abutting surface 2854 is connected to the third abutting surface 2856, and the opposite side of the second abutting surface 2854 is connected to the back of the linkage 27. Optionally, the third intersection between the first abutting surface 2852 and the third abutting surface 2856 is a circular arc transition surface, and the fourth intersection between the second abutting surface 2854 and the third abutting surface 2856 is a circular arc transition, so as to facilitate the sliding of the abutting top 285 relative to the positioning member 282.

[0053] Optionally, at least one of the first positioning surface 2822, the second positioning surface 2824, and the third positioning surface 2826 is provided with a first damping mechanism 2823; or / and at least one of the first abutting surface 2852, the second abutting surface 2854, and the third abutting surface 2856 is provided with a second damping mechanism 2853. In this embodiment, the first positioning surface 2822, the second positioning surface 2824, and the third positioning surface 2826 are all provided with the first damping mechanism 2823; and the first abutting surface 2852, the second abutting surface 2854, and the third abutting surface 2856 are all provided with the second damping mechanism 2853. The first damping mechanism 2823 on the first positioning surface 2822 and the second damping mechanism 2853 on the first abutting surface 2852 can increase the frictional resistance between the first positioning surface 2822 and the first abutting surface 2852, the first damping mechanism 2823 on the second positioning surface 2824 and the second damping mechanism 2853 on the second abutting surface 2854 can increase the frictional resistance between the second positioning surface 2824 and the second abutting surface 2854, and the first damping mechanism 2823 on the third positioning surface 2826 and the second damping mechanism 2853 on the third abutting surface 2856 can increase the frictional resistance between the third positioning surface 2826 and the third abutting surface 2856; the damping mechanism can be but is not limited to a damping small protrusion, a damping fine hole, or a rough surface.

[0054] In other embodiments, the first damping mechanism 2823 is arranged on the first positioning surface 2822, or the second damping mechanism 2853 is arranged on the first abutting surface 2852; the first damping mechanism 2823 is arranged on the second positioning surface 2824, or the second damping mechanism 2853 is arranged on the second abutting surface 2854; the first damping mechanism 2823 is arranged on the third positioning surface 2826, or the second damping mechanism 2853 is arranged on the third abutting surface 2856.

[0055] As shown in Figure 5 and Figures 7-9 The positioning assembly 281 further comprises a pushing member 283, and the positioning member 282 is connected to the pushing member 283, and the pushing member 283 is used to push the positioning member 282 to abut against the abutting portion 285. The pushing member 283 is connected to the base 23, and the positioning member 282 is arranged on the side of the pushing member 283 away from the base 23. The positioning member 282 and the pushing member 283 can be fixedly connected through clamping, gluing or the like. In the embodiment, the side of the pushing member 283 facing the positioning member 282 is provided with a positioning hole 2832, and the connecting column 2828 of the positioning member 282 is clamped in the positioning hole 2832, so that the positioning member 282 is fixedly connected to the pushing member 283. The pushing member 283 can be, but is not limited to, an elastic rubber block, an elastic plastic block, a spring silica gel block or a spring, etc. In the embodiment, the pushing member 283 is an elastic rubber block. The pushing member 283 and the base 23 can be fixedly connected through, but not limited to, gluing, clamping or the like.

[0056] The positioning assembly 281 further comprises a connecting glue 284 connected between the pushing member 283 and the base 23, so that the pushing member 283 can be firmly connected to the base 23. Preferably, the front surface of the connecting glue 284 is provided with two guide holes 2842, and the two connecting columns 2828 of the positioning member 282 pass through the two guide holes 2842 of the connecting glue 284.

[0057] As shown in Figures 4-6As shown, the base 23 comprises a seat body 231 and a back cover 235, the abutting part 283 is connected to the back cover 235 away from the positioning part 282, the seat body 231 is provided with a through slot 2310 opposite to the positioning part 282, and the positioning part 282 is accommodated in the through slot 2310; the abutting part 285 is provided on the side of the linkage 27 facing the positioning assembly 281, and the abutting part 285 is slidably accommodated in the through slot 2310. In the embodiment, the folding device 22 comprises three assisting assemblies, and the three assisting assemblies are arranged in parallel to the axial direction of the connecting shaft 260. Specifically, the folding device 22 is provided with an assisting assembly at each of the opposite ends and an assisting assembly at the middle part. Each assisting assembly comprises the seat body 231 positioned on the back cover 235, a pair of connecting shafts 260 provided on the opposite sides of the seat body 231, two rotating mechanisms 25, two connecting rods 261, the linkage 27 slidably sleeved on the pair of connecting shafts 260 and located between the two connecting rods 261, and the positioning mechanism 28; the two rotating mechanisms 25 are rotatably connected to the opposite sides of the base 23, the two connecting rods 261 are rotatably connected to the pair of connecting shafts 260, the ends of the two connecting rods 261 away from the base 23 are slidably connected to the two rotating mechanisms 25, and the connecting rod 261 and the linkage 27 are connected through the helical surface cooperation. In the embodiment, the base 23 comprises three seat bodies 231 and the back cover 235, the positioning mechanism 28 is arranged between the linkage 27 and the back cover 235, and specifically, the positioning assembly 281 is connected to the back cover 235, and the abutting part 285 is arranged on the linkage 27. In some embodiments, the positioning assembly 281 is connected to the linkage 27, and the abutting part 285 is arranged on the back cover 235. In some embodiments, the positioning assembly 281 can also be connected to the seat body 231.

[0058] In other embodiments, the folding device 22 can also comprise two assisting assemblies arranged at the opposite ends of the folding device 22, each assisting assembly comprising a seat body 231, a pair of connecting shafts 260, two rotating mechanisms 25 rotatably connected to the opposite sides of the base 23, two connecting rods 261 rotatably connected to the pair of connecting shafts 260, a linkage 27 slidably sleeved on the connecting shaft 260 and located between the two connecting rods 261, and at least one positioning mechanism 28. In the embodiment, the base 23 comprises two seat bodies 231 and the back cover 235, the positioning mechanism 28 is arranged between the linkage 27 and the back cover 235, and specifically, the positioning assembly 281 is connected to the back cover 235, and the abutting part 285 is arranged on the linkage 27.

[0059] In other embodiments, the folding device 22 can also only include a turning assisting assembly, which is arranged at the middle of the folding device 22, and includes a seat body 231, a pair of connecting shafts 260 connected to opposite sides of the base 23, two turning mechanisms 25 rotatably connected to opposite sides of the base 23, two connecting rods 261 rotatably connected to the pair of connecting shafts 260 respectively, a sliding groove 262 slidingly sleeved on the pair of connecting shafts 260 and located between the two connecting rods 261, and at least one positioning mechanism 28; in this embodiment, the base 23 includes the seat body 231 and a back cover 235, and the positioning mechanism 28 is arranged between the linkage 27 and the back cover 235, specifically, a positioning assembly 281 is connected to the back cover 235, and an abutting portion 285 is arranged on the linkage 27.

[0060] Please refer to Figures 3-6 and Figures 10-17 , the connecting rod 261 and the turning mechanism 25 are slidingly connected through the cooperation of a sliding groove and a sliding rail, the sliding groove is arranged on one of the connecting rod 261 and the turning mechanism 25, the sliding rail is arranged on the other one of the connecting rod 261 and the turning mechanism 25, the sliding rail is slidingly inserted into the sliding groove, and the frame 21 is connected to a side of the turning mechanism 25 away from the base 23. Specifically, the turning mechanism 25 includes a turning piece 250 and a connecting piece 255, the turning piece 250 is rotatably connected to the seat body 231, and an end of the turning piece 250 away from the seat body 231 is rotatably connected to the connecting piece 255; the two connecting rods 261 are slidingly connected to the two connecting pieces 255 respectively at ends thereof away from the seat body 231, and each connecting rod 261 and the corresponding connecting piece 255 are slidingly connected through the cooperation of the sliding rail and the sliding groove; in this embodiment, the connecting rod 261 is provided with a sliding rail 2610 at an end thereof away from the seat body 231, the connecting piece 255 is provided with a sliding groove 2550, the sliding rail 2610 is slidingly inserted into the sliding groove 2550, and the length direction of the sliding groove 2550 is perpendicular to the axis of the connecting shaft 260. In other embodiments, the connecting rod 261 is provided with a sliding groove at an end thereof away from the seat body 231, the connecting piece 255 is provided with a sliding rail, the sliding groove is perpendicular to the axis of the connecting shaft 260, and the sliding rail is slidingly inserted into the sliding groove.

[0061] The support mechanism 24 comprises a first middle support 242, a second middle support 244 hingedly connected to one side of the first middle support 242, and two side supports 246, one of which is connected to the side of the first middle support 242 away from the second middle support 244, and the other of which is connected to the side of the second middle support 244 away from the first middle support 242. The first middle support 242 and the second middle support 244 cover the front surface of the seat body 231, and the first middle support 242 and the second middle support 244 are rotatably connected through the cooperation of a rotating shaft and a rotating hole, the rotating shaft is arranged in one of the first middle support 242 and the second middle support 244, the rotating hole is arranged in the other of the first middle support 242 and the second middle support 244, and the axis of the rotating shaft is parallel to the axis of the connecting shaft 260.

[0062] The first middle support 242, the second middle support 244, and the side supports 246 are all rectangular plates, the two side supports 246 are rotatably connected to the two connecting rods 261 respectively, and the sides of the two side supports 246 away from the seat body 231 are rotatably connected to the two connecting members 255. Specifically, the side support 246 and the connecting rod 261 are slidably and rotatably connected through the cooperation of an adjusting groove and an adjusting shaft, the adjusting groove is arranged in one of the side support 246 and the connecting rod 261, and the adjusting shaft is arranged in the other of the side support 246 and the connecting rod 261, the axis of the adjusting shaft is parallel to the first rotating axis L1 between the rotating member 250 and the base 23, and the two first rotating axes L1 are parallel and spaced apart. In this embodiment, the end of the connecting rod 261 away from the seat body 231 is provided with an adjusting shaft 2611, and the side of the side support 246 away from the base 23 is provided with an adjusting groove 2460, and the adjusting shaft 2611 is rollingly inserted into the adjusting groove 2460. When the two side supports 246 are folded or unfolded relative to the base 23, the adjusting shaft 2611 slides and rotates in the adjusting groove 2460.

[0063] Specifically, the side support 246 comprises a side support plate 2461 and an adjusting plate 2462 arranged on the back of the side support plate 2461, and the adjusting groove 2460 is arranged on the adjusting plate 2462. In the embodiment, the back of the side support plate 2461 is provided with three adjusting plates 2462, two of which are located at opposite ends of the side support plate 2461, and the other is located at the middle of the side support plate 2461. The adjusting shaft 2611 of the connecting rod 261 of the three assisting assemblies can be respectively and movably inserted into the adjusting groove 2460 of the corresponding adjusting plate 2462. The adjusting groove 2460 extends from one side of the side support plate 2461 to the other side, and the middle part of the adjusting groove 2460 is curved away from the side of the side support plate 2461. The adjusting groove 2460 comprises a first positioning section 2463 and a second positioning section 2464 located at opposite ends thereof, and the first positioning section 2463 is farther away from the middle support than the second positioning section 2464. When the two side supports 246 are in a fully flattened state, the adjusting shaft 2611 is positioned in the first positioning section 2463, so that the front surfaces of the two side supports 246, the front surface of the first middle support 242 and the front surface of the second middle support 244 are coplanar, thereby stably supporting the flexible screen to prevent the flexible screen from being damaged due to inward indentation. When the two side supports 246 are in a fully folded state, the adjusting shaft 2611 is positioned in the second positioning section 2464, so that the front surfaces of the two side supports 246, the front surface of the first middle support 242 and the front surface of the second middle support 244 form a water drop-shaped accommodation space, thereby facilitating the accommodation of the bendable area of the flexible screen. In the embodiment, the outer surface of the adjusting plate 2462 away from the side support plate 2461 is arc-shaped, thereby facilitating the folding or unfolding of the two side supports 246.

[0064] The rotation axis between the side support 246 and the connecting piece 255 is parallel to the first rotation axis L1, and the side support 246 and the connecting piece 255 are rotatably connected through the cooperation of the first circular-arc groove and the first circular-arc track. The first circular-arc groove is arranged in one of the side support 246 and the connecting piece 255, and the first circular-arc track is arranged in the other one of the side support 246 and the connecting piece 255. The axis of the first circular-arc groove is parallel to the first rotation axis L1. Specifically, the side support 246 away from the first middle support 242 is provided with a plurality of arc plates 2465, each of which is provided with a circular-arc groove 2466. The plurality of circular-arc grooves 2466 have a common axis, one end of the circular-arc groove 2466 extends to the back of the side support plate 2461, and the other end of the circular-arc groove 2466 penetrates through the side of the side support plate 2461. The opposite ends of the connecting piece 255 are respectively provided with a first circular-arc track 2552, and the two first circular-arc tracks 2552 are rotatably accommodated in the corresponding two circular-arc grooves 2466.

[0065] In other embodiments, the first arc plate of the side support 246 is provided with a first arc rail, and the end face of the connecting piece 255 is provided with a first arc groove corresponding to the first arc rail. The first arc rail is rotatably accommodated in the first arc groove.

[0066] The first rotation axis L1 between the rotating piece 250 and the seat body 231 is parallel to the second rotation axis L2 between the connecting link 261 and the seat body 231, and the sliding direction of the sliding rail of the connecting link 261 in the sliding groove is perpendicular to the first rotation axis L1. Specifically, the two rotating pieces 250 rotate relative to the seat body 231 around the two first rotation axes L1, which are parallel to each other. The two connecting links 261 rotate relative to the seat body 231 around the two second rotation axes L2, which are parallel to each other and coaxial with the two connecting shafts 260, and the first rotation axis L1 is parallel to the second rotation axis L2. The rotating piece 250 is rotatably connected to the seat body 231 through the cooperation of the second arc rail and the second arc groove, and the axis of the second arc rail is collinear with the first rotation axis L1. The second arc rail is arranged in one of the rotating piece 250 and the base 23, and the second arc groove is arranged in the other one. In this embodiment, the end of the rotating piece 250 away from the connecting piece 255 is provided with a second arc rail 2501, and the opposite sides of the seat body 231 are respectively provided with second arc grooves 2311. The second arc rail 2501 is rotatably accommodated in the second arc groove 2311. The rotating piece 250 is rotatably connected to the connecting piece 255 through a rotating shaft, and the third rotation axis between the rotating piece 250 and the connecting piece 255 is parallel to the first rotation axis L1.

[0067] The rotating piece 250 includes a first rotating part 2503 and a second rotating part 2505 arranged at opposite ends thereof. The second arc rail 2501 is arranged at the end of the first rotating part 2503, and the second rotating part 2505 is rotatably connected to the connecting piece 255. In this embodiment, the opposite ends of the first rotating part 2503 are respectively provided with second arc rails 2501, and the two second arc rails 2501 are coaxial. The side of the second rotating part 2505 away from the first rotating part 2503 is provided with two rotating cylinders 2506 spaced from each other, and the two rotating cylinders 2506 are coaxial. One end of the connecting piece 255 is provided with two avoiding openings 2551 spaced from each other, and the two rotating cylinders 2506 are rotatably accommodated in the two avoiding openings 2551, respectively.

[0068] The connecting piece 255 is in a strip shape, and opposite ends of the connecting piece 255 are respectively provided with first circular arc tracks 2552 away from one side of the rotating piece 250. The connecting piece 255 comprises a transition part 2554 and a guide sliding part 2556 provided at opposite ends of the connecting piece 255 and connected to the transition part 2554, one first circular arc track 2552 is provided at one end of the transition part 2554 away from the guide sliding part 2556, the other first circular arc track 2552 is provided at one end of the guide sliding part 2556 away from the transition part 2554, a second rotating part 2505 is rotatably connected to the transition part 2554, a sliding groove 2550 is provided at the guide sliding part 2556, and the sliding rails 2610 of the connecting rod piece 261 are slidably inserted into the sliding groove 2550. Specifically, the front surface of the transition part 2554 is provided with two avoidance openings 2551 at intervals, the transition part 2554 is provided with a connecting hole 2553 along the length direction of the connecting piece 255, and the connecting hole 2553 communicates the two avoidance openings 2551; the two avoidance openings 2551 are respectively used for accommodating the two rotating cylinders 2506, when the two rotating cylinders 2506 are rotatably accommodated in the two avoidance openings 2551, the connecting shaft 256 is inserted into the connecting hole 2553 and the inner cavity of the rotating cylinder 2506. The front surface of the guide sliding part 2556 is provided with a guide groove 2557, opposite ends of the guide groove 2557 respectively pass through opposite sides of the guide sliding part 2556, and one end of the connecting rod piece 261 away from the seat body 231 is slidably accommodated in the guide groove 2557; the inner side surface of the guide groove 2557 is provided with the sliding groove 2550, and the sliding groove 2550 passes through opposite sides of the guide sliding part 2556 along a direction perpendicular to the first rotating axis L1. In this embodiment, the guide sliding part 2556 is respectively provided with the sliding groove 2550 at opposite inner side surfaces of the guide groove 2557, and the two sliding rails 2610 of the connecting rod piece 261 are respectively slidably inserted into the two sliding grooves 2550.

[0069] The seat body 231 is an elongated body, and includes a first mounting portion 232 and a second mounting portion 233 at opposite ends thereof, and a third mounting portion 236 between the first mounting portion 232 and the second mounting portion 233, the first mounting portion 232 being configured to mount the rotating member 250. The front surface of the first mounting portion 232 is provided with a circular-arc-shaped assisting rotating groove 2321 on each side thereof, and the first rotating portion 2503 is rotatably accommodated in the assisting rotating groove 2321, and the second circular-arc groove 2501 is rotatably accommodated in the corresponding second circular-arc groove 2311. Specifically, the end of the front surface of the first mounting portion 232 away from the third mounting portion 236 is provided with a protrusion 2322 on each side thereof, and the surface of the protrusion 2322 facing the third mounting portion 236 is provided with the second circular-arc groove 2311. Optionally, the inner surface of the assisting rotating groove 2321 is provided with a circular-arc surface, and the axes of the assisting rotating grooves 2321 on the same side of the seat body 231 are collinear with the axis of the second circular-arc groove 2311. The second mounting portion 233 includes a support strip 2331 connected to the end of the third mounting portion 236 away from the first mounting portion 232, and a positioning sheet 2332 provided on the support strip 2331 away from the third mounting portion 236; optionally, the end of the support strip 2331 away from the third mounting portion 236 is connected to the middle portion of the positioning sheet 2332, the opposite ends of the positioning sheet 2332 extend out of the opposite sides of the support strip 2331, and the opposite ends of the positioning sheet 2332 are provided with a connecting hole 2334 and a guide sliding shaft 2336, respectively, and the axis of the guide sliding shaft 2336 is parallel to the axis of the connecting hole 2334. The third mounting portion 236 includes a connecting strip 2361 connected between the first mounting portion 232 and the second mounting portion 233, two support sheets 2363 connected to the first mounting portion 232, and guide sliding blocks 2365 provided on the opposite sides of the connecting strip 2361; the two support sheets 2363 are provided on the opposite sides of the connecting strip 2361, respectively, and the front surface of the support sheet 2363 is a circular-arc surface. The two guide sliding blocks 2365 are located at the end close to the second mounting portion 233. In this embodiment, a through groove 2310 is provided at the end of the support strip 2331 of the second mounting portion 233 close to the positioning sheet 2332, and the length direction of the through groove 2310 is parallel to the length direction of the support strip 2331. Optionally, the front surface of the seat body 231 is provided with a plurality of fixing holes 2313 arranged along the length direction of the seat body 231.

[0070] The front surface of the back cover 235 is provided with a plurality of positioning portions 2352 along the length direction thereof, and the positioning portions 2352 are used for fixedly connecting the base 23. The positioning portions 2352 are provided with positioning blocks 2353, and the positioning blocks 2353 are used for fixedly connecting the positioning assembly 281. The positioning blocks 2353 and the positioning assembly 281 can be fixedly connected by means of, but not limited to, clamping, gluing and the like. Alternatively, the front surface of the positioning block 2353 is provided with a positioning hole 2354, and the positioning assembly 281 is accommodated in the positioning hole 2354. In the embodiment, the front surface of the back cover 235 is provided with three positioning portions 2352, two of which are arranged at opposite ends of the back cover 235, and the other one is arranged at the middle portion of the back cover 235. The bases 23 of the three assisting assemblies are respectively connected to the three positioning portions 2352. The positioning portions 2352 are provided with fixing columns 2357, and the fixing columns 2357 are clamped in the corresponding fixing holes 2313.

[0071] The folding device 22 further comprises a stopper 220, which is connected to the third mounting portion 236 of the base 23 and is positioned together with the base 23 to rotate the rotating member 250. The stopper 220 comprises positioning portions 221 at opposite ends thereof and a connecting portion 225 connected between the two positioning portions 221. The same side of the two positioning portions 221 is respectively provided with a third circular arc groove 223, and the axes of the two third circular arc grooves 223 are parallel. The second circular arc tracks 2501 on the same side of the two rotating members 250 are respectively rotatably accommodated in the two third circular arc grooves 223 of the stopper 220. Alternatively, the back surface of the positioning portion 221 is provided as a circular arc surface matched with the front surface of the supporting sheet 2363, so as to facilitate the stopper 220 to slide on the supporting sheet 2363 along the axis direction of the third circular arc groove 223. In other embodiments, the side of the two positioning portions 221 facing the rotating member 250 is respectively provided with a circular arc track, and the first rotating portion 2503 of the rotating member 250 facing the side of the stopper 220 is respectively provided with a circular arc groove. The two circular arc tracks are rotatably accommodated in the two circular arc grooves. The back surface of the stopper 220 is provided with a guide sliding groove 226, and the guide sliding block 2365 is slidingly accommodated in the guide sliding groove 226, so that the stopper 220 can move along the length direction of the base 23. The side of the two positioning portions 221 away from the third circular arc groove 223 is provided with a connecting hole 224, and the axes of the two connecting holes 224 are parallel.

[0072] As Figures 14-17As shown, the connecting rod 261 further comprises a rotating part 2613 rotatably connected to the connecting shaft 260 and a sliding part 2614, and the slide rails 2610 are arranged on the side of the sliding part 2614. Specifically, the rotating part 2613 is a rotating cylinder, the rotating cylinder is provided with a rotating hole 2612 along the axial direction of the rotating cylinder, and the connecting shaft 260 is inserted into the rotating hole 2612 of the rotating cylinder; the sliding part 2614 is a rectangular plate, and the opposite sides of the rectangular plate are respectively provided with the slide rails 2610, and the slide rails 2610 are perpendicular to the axis of the rotating cylinder. One end of the rotating part 2613 is provided with a cam 2616, and the rotating part 2613 and the cam 2616 are coaxial. The cam 2616 comprises a concave-convex surface arranged at the end of the rotating cylinder, the concave-convex surface comprises a first convex part 2616a and a first concave part 2616b, and the first convex part 2616a and the first concave part 2616b are sequentially and spaced arranged along the circumferential direction of the rotating cylinder; the number of the first convex part 2616a and the number of the first concave part 2616b can be set as required, for example, the cam 2616 can comprise one first convex part 2616a and one first concave part 2616b, two first convex parts 2616a and two first concave parts 2616b, three first convex parts 2616a and three first concave parts 2616b, or four first convex parts 2616a and four first concave parts 2616b, etc. In the embodiment, the cam 2616 comprises three first convex parts 2616a and three first concave parts 2616b which are spaced arranged along the circumferential direction of the rotating cylinder.

[0073] The connecting rod 261 is provided with a receiving groove 2617, the linkage 27 is arranged through the pair of connecting shafts 260 and is accommodated in the receiving groove 2617. Specifically, the outer circumferential surface of the rotating part 2613 of the connecting rod 261 is provided with the receiving groove 2617, the receiving groove 2617 extends along the radial direction of the rotating part 2613, and the receiving groove 2617 is in communication with the rotating hole 2612. Specifically, the connecting rod 261 comprises a first abutting helical surface 2617a and a second abutting helical surface 2617b, the rotating direction of the first abutting helical surface 2617a is opposite to the rotating direction of the second abutting helical surface 2617b, and the axis of the first abutting helical surface 2617a is coaxial with the axis of the second abutting helical surface 2617b; the first abutting helical surface 2617a and the second abutting helical surface 2617b are respectively located at opposite ends of the receiving groove 2617, specifically, the first abutting helical surface 2617a is arranged at the inner end face of the receiving groove 2617 close to the cam 2616, and the second abutting helical surface 2617b is arranged at the inner end face of the receiving groove 2617 away from the cam 2616. The axis of the first abutting helical surface 2617a, the axis of the second abutting helical surface 2617b and the rotating axis of the rotating part 2613 are coaxial. The first abutting helical surface 2617a and the second abutting helical surface 2617b respectively rotate less than one circle around the axis of the rotating cylinder.

[0074] The linkage 27 is provided with a first helical surface 271 and a second helical surface 273 on opposite sides, that is, each side of the linkage 27 is provided with a first helical surface 271 and a second helical surface 273 on opposite ends, the first helical surface 271 and the second helical surface 273 on the same side of the linkage 27 are coaxial; the first abutting helical surface 2617a of the connecting rod 261 cooperates with the first helical surface 271, and the second abutting helical surface 2617b of the connecting rod 261 cooperates with the second helical surface 273; the first helical surface 271 and the second helical surface 273 are opposite in rotation direction, the first helical surface 271 and the first abutting helical surface 2617a are the same in rotation direction, and the second helical surface 273 and the second abutting helical surface 2617b are the same in rotation direction. The two connecting rods 261 can rotate around a pair of connecting shafts 260 respectively, but cannot move along the axial direction of the connecting shafts 260, and the linkage 27 is sleeved on the pair of connecting shafts 260 in the axial direction of the connecting shafts 260 and can only move along the axial direction of the connecting shafts 260 but cannot rotate around the connecting shafts 260. When one of the connecting rods 261 rotates around the corresponding connecting shaft 260, the first abutting helical surface 2617a and the second abutting helical surface 2617b respectively slide against the first helical surface 271 and the second helical surface 273 on one side of the linkage 27 to make the linkage 27 move along the axial direction of the connecting shafts 260, at the same time, the linkage 27 respectively slides against the first abutting helical surface 2617a and the second abutting helical surface 2617b of the other connecting rod 261 on the other side, and since the two connecting rods 261 cannot move along the axial direction of the connecting shafts 260, the linkage 27 can realize the synchronous rotation of the two connecting rods 261 to fold or unfold through the sliding of the linkage 27 along the connecting shafts 260.

[0075] Specifically, the linkage 27 includes two parallel and spaced sliding cylinders 272 and a connecting plate 274 connected between the two sliding cylinders 272, a pair of connecting shafts 260 are respectively arranged in the two sliding cylinders 272, the first helical surface 271 and the second helical surface 273 are respectively arranged on opposite ends of each sliding cylinder 272, and the axis of the first helical surface 271 and the axis of the second helical surface 273 are coaxial; further, the first helical surface 271 is arranged on the side of the sliding cylinder 272 close to the connecting plate 274, the first helical surface 271 rotates less than one turn around the axis of the sliding cylinder 272, the second helical surface 273 is arranged on the side of the sliding cylinder 272 away from the connecting plate 274, and the second helical surface 273 rotates less than one turn around the axis of the sliding cylinder 272. The abutting portion 285 is arranged on the back of the connecting plate 274, the first abutting surface 2852 is farther away from the cam 2616 than the second abutting surface 2854, and the third abutting surface 2856 is parallel to the back of the connecting plate 274.

[0076] The folding device 22 further comprises a stopper assembly 29, which comprises a stopper 291 and an elastic member 294. The stopper 291 is sleeved on the pair of connecting shafts 260 in a sliding manner. The stopper 291 and the connecting link 261 are connected through cam cooperation. The elastic member 294 is used to push the stopper 291 and the connecting link 261 to stop each other. When the connecting link 261 rotates around the corresponding connecting shaft 260, the stopper 291 and the connecting link 261 have a frictional resistance, which can hinder the rotation of the two connecting links 261 around the pair of connecting shafts 260. In the embodiment, the stopper 291 comprises two stopper cams 2910 sleeved on the pair of connecting shafts 260. The pair of connecting shafts 260 are respectively arranged in the cam 2616 of the two connecting links 261 and the two stopper cams 2910 of the stopper 291. The two stopper cams 2910 are rotatably arranged with the cam 2616 of the two connecting links 261. Specifically, the stopper 291 comprises two parallel and spaced stopper barrels 292 and a connecting portion 293 connected between the two stopper barrels 292. The axes of the two stopper barrels 292 are parallel and spaced. The two stopper barrels 292 are respectively sleeved on the pair of connecting shafts 260 in a slidable manner.

[0077] Each stopper barrel 292 is provided with a stopper cam 2910 facing the connecting link 261. Each stopper cam 2910 comprises a concave-convex surface arranged at an end of the stopper barrel 292 away from the elastic member 294. The concave-convex surface comprises a second convex portion 2911 and a second concave portion 2913. The second convex portion 2911 and the second concave portion 2913 are sequentially and spaced arranged along the circumferential direction of the stopper barrel 292. The number of the second convex portions 2911 and the number of the second concave portions 2913 can be set as required. For example, the stopper cam 2910 can comprise one second convex portion 2911 and one second concave portion 2913, two second convex portions 2911 and two second concave portions 2913, three second convex portions 2911 and three second concave portions 2913, or four second convex portions 2911 and four second concave portions 2913. In the embodiment, the stopper cam 2910 comprises three second convex portions 2911 and three second concave portions 2913 spaced along the circumferential direction of the stopper barrel 292. The axis of each stopper cam 2910 is collinear with the axis of the corresponding stopper barrel 292. Preferably, the opposite end surfaces of the stopper 291 form a circular arc surface, so as to facilitate the folding or unfolding of the folding device 22.

[0078] In some embodiments, one of the stopper cams 2910 on the two stopper barrels 292 can be omitted. The cam 2616 of one connecting link 261 can be omitted.

[0079] Please refer to Figures 10-19When the folding device 22 is assembled, the rotating cylinder 2506 of the rotating member 250 is accommodated in the accommodation opening 2551 of the connecting member 255, so that the inner cavity of the rotating cylinder 2506 is opposite to the connecting hole 2553, one rotating shaft 256 is inserted into the inner cavity of the rotating cylinder 2506 and the connecting hole 2553, so that the rotating member 250 is rotatably connected with the connecting member 255; the first rotating part 2503 of the two rotating members 250 is respectively arranged in the two assisting rotating grooves 2321 of the base 23, so that the second circular arc rail 2501 at one end of the rotating member 250 is rotatably accommodated in the corresponding second circular arc groove 2311; the two positioning parts 221 of the abutting member 220 are respectively arranged in the two supporting sheets 2363, so that the two guide sliding blocks 2365 are respectively slidably accommodated in the two guide sliding grooves 226 of the abutting member 220, and the second circular arc rails 2501 at the end of the two rotating members 250 away from the protrusion 2322 are respectively rotatably accommodated in the two third circular arc grooves 223 of the abutting member 220. The positioning assembly 281 is installed to the base 23, specifically, the two connecting columns 2828 of the positioning member 282 are respectively threaded through the two positioning holes 2832 of the abutting pushing member 283, the front surface of the connecting adhesive 284 is attached to the side of the abutting pushing member 283 away from the positioning member 282, the two connecting columns 2828 are threaded through the two guide holes 2842 of the connecting adhesive 284, the positioning assembly 281 is accommodated in the positioning hole 2354 of the positioning block 2353 of the back cover 235, and the connecting adhesive 284 is glued to the back cover 235.The seat body 231 is positioned on the front surface of the back cover 235, so that the fixing column 2357 is clamped in the corresponding fixing hole 2313; the opposite sides of the linkage 27 are respectively accommodated in the accommodation grooves 2617 of the two connecting link members 261, the sliding cylinder 272 on one side of the linkage 27 is accommodated in the accommodation groove 2617 of the corresponding connecting link member 261, and the sliding cylinder 272 on the other side is accommodated in the accommodation groove 2617 of the corresponding connecting link member 264; the linkage 27 is placed in the second mounting portion 233, so that the abutting portion 285 is accommodated in the through groove 2310 of the second mounting portion 233, and the first abutting surface 2852 is attached to the first positioning surface 2822; the two abutting cams 2910 of the abutting member 291 are respectively attached to the cams 2616 of the two connecting link members 261, and the two elastic members 294 are placed between the abutting member 291 and the abutting portion 220; the two connecting shafts 260 are respectively inserted into the two connecting holes 2334 of the seat body 231, the rotation holes 2612 of the rotation portions 2613 of the two connecting link members 261, the inner cavities of the two sliding cylinders 272 of the linkage 27, the inner cavities of the two abutting cylinders 292 of the abutting member 291, and the inner cavities of the two abutting members 283, one end of each of the two elastic members 294 abuts against the two abutting cylinders 292 of the abutting member 291, so that the two abutting cams 2910 of the abutting member 291 respectively cooperate with the cams 2616 of the two connecting link members 261, and the opposite ends of the two elastic members 294 abut against each other; the sliding rails 2610 of the two connecting link members 261 are respectively slidably inserted into the sliding grooves 2550 of the two connecting members 255; the first middle support member 242 and the second middle support member 244 are hingedly attached to each other and then attached to the front surface of the seat body 231, so that the two guide sliding shafts 2336 on the seat body 231 are respectively inserted into the guide sliding grooves of the first middle support member 242 and the second middle support member 244; the two side support members 246 are respectively placed on the front surfaces of the rotation mechanisms 25 on the opposite sides of the seat body 231, so that the adjustment shafts 2611 of the connecting link members 261 are rotatably and slidably inserted into the adjustment grooves 2460 of the corresponding side support members 246, and the first circular arc rails 2552 of the connecting members 255 are rotatably accommodated in the circular arc grooves 2466 of the corresponding side support members 246.

[0080] At this time, one end of the two elastic members 294 elastically abuts against the abutting member 220 to abut against the two rotating members 250, so that the two rotating members 250 abut against the two protrusions 2322 respectively, and the two second circular-arc tracks 2501 of each rotating member 250 are rotatably accommodated in the second circular-arc slot 2311 and the third circular-arc slot 223 respectively. When the rotating member 250 rotates relative to the base 23, the connecting member 255 rotates relative to the base 23 along with the rotating member 250 to drive the connecting rod member 261 to rotate around the corresponding connecting shaft 260, so that the connecting plate 274 slides along the axial direction of the connecting shaft 260 to abut against the positioning member 282, so that the abutting portion 285 and the positioning member 282 have a frictional resistance therebetween, secondly, the rotating member 250 and the base 23 and the abutting member 220 have a frictional resistance therebetween, in addition, the two abutting cams 2910 abut against the two cam members 2616 of the two connecting rod members 261 respectively, so that the two connecting rod members 261 can rotate around the two connecting shafts 260 respectively, and the two cam members 2616 and the two abutting cams 2910 have a frictional resistance therebetween, which hinders the rotating member 250 from rotating relative to the base 23, and under the action of no external force, the two rotating members 250 are limited relative to the base 23.

[0081] When the two side supports 246 are in the fully unfolded state, the adjusting shaft 2611 is positioned at the first positioning section 2463 of the side support 246; the two rotating mechanisms 25 of each assisting assembly are in the fully unfolded state, the two connecting rod members 261 are in the fully unfolded state, the two elastic members 294 elastically push against the abutting member 291, so that the two abutting cams 2910 of the abutting member 291 abut against the cams 2616 of the two connecting rod members 261 respectively, so that the two connecting rod members 261 are limited relative to the base 23, at the same time, the first positioning face 2822 of the positioning member 282 is positioned at the first abutting face 2852 of the abutting portion 285, so as to limit the two connecting rod members 261 from rotating and bending relative to the base 23, to prevent the linkage 27 from sliding relative to the base 23, so that the two side supports 246 are kept in the stable fully unfolded state, and the front face of the two side supports 246, the front face of the first middle support 242 and the front face of the second middle support 244 are coplanar. When the two side supports 246 are in the fully folded state, the adjusting shaft 2611 is positioned at the second positioning section 2464 of the side support 246; the two rotating mechanisms 25 are in the fully folded state, the two connecting rod members 261 are in the fully folded state, the two elastic members 294 elastically push against the abutting member 291, so that the two abutting cams 2910 of the abutting member 291 abut against the cams 2616 of the two connecting rod members 261 respectively, so that the two connecting rod members 261 are limited relative to the base 23, at the same time, the second positioning face 2824 of the positioning member 282 is positioned at the second abutting face 2854 of the abutting portion 285, so as to limit the two connecting rod members 261 from rotating and unfolding relative to the base 23, to prevent the linkage 27 from sliding relative to the base 23, so that the two side supports 246 are kept in the stable fully folded state, and the front face of the side support 246, the front face of the first middle support 242 and the front face of the second middle support 244 form a water drop-shaped space, so as to conveniently accommodate the bendable area 51 of the flexible screen 50. When the two side supports 246 are in the intermediate folded state, the two connecting rod members 261 are synchronously rotated and bent relative to the base 23 to a specific angle, the linkage 27 slides along the connecting shaft 260, the two rotating mechanisms 25 are synchronously rotated and bent relative to the base 23 to a specific angle, the two elastic members 294 elastically push against the abutting member 291 to abut against the two connecting rod members 261, so that the two abutting cams 2910 and the cams 2616 of the two connecting rod members 261 have frictional resistance therebetween, the rotating member 250 and the base 23 and the abutting member 220 have frictional resistance therebetween, and the third positioning face 2826 of the positioning member 282 is positioned at the third abutting face 2856 of the abutting portion 285, so that the third positioning face 2826 and the third abutting face 2856 have frictional resistance therebetween; without external force, the two side supports 246 can be kept in any folded state except the fully unfolded state and the fully folded state, so that the electronic device 100 is in any hovering state.

[0082] It should be noted that: the fully flat state refers to the front faces of the two side supports 246 being coplanar, i.e. the included angle between the front faces of the two side supports 246 being 180 degrees; the fully folded state refers to the front faces of the two side supports 246 forming a water drop-shaped space; the intermediate folded state refers to the front faces of the two side supports 246 forming any folding state other than the coplanar state and the water drop-shaped space, i.e. the included angle between the front faces of the two frame bodies 21 being in the range of greater than 0 degrees and less than 180 degrees. In this embodiment, the intermediate folded state of the folding device 22 is that the angle between the two connecting pieces 255 of each assisting assembly is 90 degrees.

[0083] Please refer to Figures 1-7 The installed folding device 22 is placed between the two frame bodies 21, and the opposite sides of the folding device 22 are fixedly connected with the two frame bodies 21, respectively. Specifically, the side supports 246 of the opposite sides of the base 23 are respectively accommodated in the mounting grooves 216 of the two frame bodies 21, and the connecting pieces 255 are connected to the frame bodies 21. At this time, the front faces 211 of the two frame bodies 21, the front faces of the two side supports 246, the front face of the first middle support 242 and the front face of the second middle support 244 are coplanar; the first abutting face 2852 of each abutting portion 285 abuts against the first positioning face 2822 of the corresponding positioning member 282, so that the two frame bodies 21 are kept in the flat state. The bendable area 51 of the flexible screen 50 is attached to the front faces of the two side supports 246, the front face of the first middle support 242 and the front face of the second middle support 244 of the folding device 22, and the two non-bendable areas 53 are respectively attached to the front faces 211 of the two frame bodies 21. Due to the frictional resistance between the abutting member 291 of the abutting assembly 29 and the connecting link 261, the frictional resistance between the abutting portion 285 and the positioning member 282, and the frictional resistance between the rotating member 250 and the base 23 and the abutting member 220, the bendable area 51 of the flexible screen 50 is positioned at any bending angle, so that the two frame bodies 21 can be freely adjusted in the flat state, the fully folded state and the intermediate folded state, i.e. the electronic device 100 can be positioned in the flat state, the fully folded state and any intermediate folded state.

[0084] Please refer to Figure 1 and Figures 20-27, when the electronic device 100 is folded, a force for folding is applied to at least one of the two frame bodies 21 of the electronic device 100, so that the connecting pieces 255 connected to the two frame bodies 21 drive the rotating pieces 250 to rotate relative to the base 23 around the first rotating axis L1 and rotate in a direction of approaching each other, the side supports 246 rotate relative to the connecting pieces 255, and the side supports 246 are connected in rotation and sliding through cooperation of the adjusting shafts 2611 and the adjusting grooves 2460, the two connecting pieces 255 respectively drive the two connecting rods 261 to rotate relative to the base 23 and approach each other, the first abutting helical surfaces 2617a and the second abutting helical surfaces 2617b of the connecting rods 261 respectively abut the first helical surfaces 271 and the second helical surfaces 273 in sliding, so that the linkage 27 slides in the axial direction of the connecting shaft 260 in the first direction, and the linkage 27 is used to realize synchronous rotation of the two connecting rods 261 around a pair of connecting shafts 260 and approach each other, at the same time, the abutting part 285 on the linkage 27 slides relative to the corresponding positioning part 282, specifically, from sliding between the first abutting surface 2852 of the abutting part 285 and the first positioning surface 2822 of the positioning part 282, through sliding between the third abutting surface 2856 and the third positioning surface 2826, to mutual adhesion of the second abutting surface 2854 and the second positioning surface 2824, so as to realize synchronous folding of the folding device 22, and the foldable area 51 of the flexible screen 50 is folded with the folding device 22. In the folding process of the electronic device 100, the connecting pieces 255 and the side supports 246 are connected in rotation through cooperation of the first circular arc tracks 2552 and the circular arc grooves 2466, and the adjusting shafts 2611 of the rotating pieces 250 slide and rotate in the adjusting grooves 2460 of the side supports 246; the side supports 246 on the opposite sides of the base 23 approach each other, until the adjusting shafts 2611 are limited in the second positioning section 2464, and the cams 2616 abut the abutting cams 2910 of the abutting parts 291, the second abutting surface 2854 is positioned in the second positioning surface 2824, so as to prevent the connecting rods 261 from rotating, the linkage 27 is limited to slide along the connecting shaft 260 through the connecting rods 261, and the front surfaces of the two side supports 246 form a cross-section in the shape of a water drop; the foldable area 51 of the flexible screen 50 is folded with the folding device 22, until the foldable area 51 is folded into a water drop shape, so as to realize folding of the electronic device 100.

[0085] In the process of unfolding the electronic device 100, the connecting member 255 and the side support member 246 are rotated through the cooperation of the first circular arc track 2552 and the circular arc groove 2466, and the adjusting shaft 2611 of the rotating member 250 slides and rotates in the adjusting groove 2460 of the side support member 246; the side support members 246 on the opposite sides of the base 23 are away from each other until the adjusting shaft 2611 is limited in the first positioning section 2463, and the cam 2616 abuts against the abutting cam 2910 of the abutting member 291, the first abutting surface 2852 is positioned on the first positioning surface 2822, so as to prevent the connecting rod member 261 from rotating, and the linkage member 27 is limited to slide along the connecting shaft 260 through the connecting rod member 261, so as to make the side support members 246 on the opposite sides of the base 23 unfold, until the two side support members 246 are in the unfolded state, the bendable area 51 of the flexible screen 50 unfolds with the folding device 22, until the flexible screen 50 is completely unfolded, so as to realize the unfolding of the electronic device 100.

[0086] The folding device 22 of the electronic device 100 of the present application can realize the synchronous folding or synchronous unfolding of the two side support members 246 through the linkage 27 arranged between the two connecting rod members 261, and is convenient to operate; the folding device 22 has fewer elements, simple structure, low manufacturing cost, and reduces the internal space of the folding housing 20 occupied by the folding device 22, which is beneficial to the layout of the main board or the battery and other elements. Secondly, the frictional resistance between the first abutting surface 2852 of the first abutting portion 285 and the first positioning surface 2822 of the positioning member 282, the frictional resistance between the third abutting surface 2856 and the third positioning surface 2826, the frictional resistance between the second abutting surface 2854 and the second positioning surface 2824, the frictional resistance between the cam 2616 of the connecting rod member 261 and the abutting cam 2910, and the frictional resistance between the rotating member 250 and the base 23 and the abutting member 220, make the bendable area 51 of the flexible screen 50 positioned at any bending angle, so that the two frame bodies 21 can be freely adjusted in the unfolded state, the completely folded state and the intermediate folding state, that is, the electronic device 100 can be positioned in the unfolded state, the folded state and any intermediate folding state, so that the electronic device 100 has a hovering function between the two frame bodies 21 of 0 to 180 degrees, and the hovering angle range is large.

[0087] The above is the implementation of the embodiment of the present application. It should be noted that for ordinary skilled in the art, without departing from the principles of the present application, several improvements and refinements can be made, which are also considered within the scope of protection of the present application.

Claims

1. A folding device, characterized in that, The folding device comprises: a base; a pair of connecting shafts, each of which is arranged on opposite sides of the base; a pair of connecting rods, each of which is rotatably connected to one of the connecting shafts; a linkage member arranged between the two connecting rods and connected to the pair of connecting shafts, the linkage member being slidable relative to the base along the axial direction of the connecting shafts, and the two connecting rods being connected to the linkage member through a helical surface; a positioning mechanism comprising a positioning component and an abutting portion that is slidably abutted against the positioning component, the positioning component being arranged on one of the base and the linkage member, and the abutting portion being arranged on the other one of the base and the linkage member; when one of the connecting rods or the pair of connecting rods rotates around the corresponding connecting shaft, the linkage member slides relative to the base along the axial direction of the connecting shafts, and the two connecting rods synchronously rotate in opposite directions relative to the base, so that the abutting portion slides relative to the positioning component with a frictional resistance, and the frictional resistance is used for positioning the connecting rods relative to the base.

2. The folding device of claim 1, wherein The positioning component comprises a positioning member comprising a first positioning surface and a second positioning surface, the first positioning surface and the second positioning surface being arranged on opposite sides of the positioning member along the sliding direction of the linkage member; the abutting portion comprises a first abutting surface and a second abutting surface arranged on opposite sides thereof, the first positioning surface being abutted against the first abutting surface when the pair of connecting rods is in a flat state relative to the base, and the second positioning surface being abutted against the second abutting surface when the pair of connecting rods is in a fully folded state relative to the base.

3. The folding device of claim 2, wherein The positioning member further comprises a third positioning surface connected between the first positioning surface and the second positioning surface; the abutting portion further comprises a third abutting surface connected between the first abutting surface and the second abutting surface; the third positioning surface is abutted against the third abutting surface when the pair of connecting rods is in an intermediate folded state relative to the base.

4. The folding device of claim 3, wherein At least one of the first positioning surface, the second positioning surface and the third positioning surface is provided with a first damping mechanism; or / and at least one of the first abutting surface, the second abutting surface and the third abutting surface is provided with a second damping mechanism.

5. The folding device of claim 2, wherein The positioning component further comprises a pushing member, the positioning member being connected to the pushing member, and the pushing member being used for pushing the positioning member against the abutting portion.

6. The folding device of claim 5, wherein The base comprises a seat body and a back cover, the pushing member being connected to the back cover away from the positioning member, the seat body being provided with a through slot facing the positioning member, and the positioning member being accommodated in the through slot; the abutting portion is arranged on a side of the linkage member facing the positioning component, and the abutting portion is slidably accommodated in the through slot along with the linkage member.

7. The folding apparatus of claim 3, wherein The third positioning surface is parallel to the plane containing the axes of the pair of connecting shafts, and both the first positioning surface and the second positioning surface are inclined relative to the third positioning surface; the third abutting surface is parallel to the third positioning surface, the first abutting surface is parallel to the first positioning surface, and the second abutting surface is parallel to the second positioning surface.

8. The folding apparatus of claim 3, wherein The folding device further includes a supporting member and an elastic member. The supporting member is slidably sleeved on a pair of connecting shafts. The supporting member and the connecting rod are engaged by a cam. The elastic member is used to push the supporting member and the connecting rod against each other. When the connecting rod rotates relative to the supporting member, there is frictional resistance between the connecting rod and the supporting member.

9. A foldable housing characterized by, The folding housing includes a folding device as described in any one of claims 1-8 and at least two frames, wherein the folding device is located between two adjacent frames, and the opposite sides of the folding device are respectively connected to the two adjacent frames.

10. An electronic device, comprising: The electronic device includes a flexible screen and a folding housing as described in claim 9, wherein the flexible screen is connected to the folding housing.

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