Folding mechanism, synchronization assembly, folding device and electronic equipment

Abstract

The invention provides a folding mechanism, a synchronization assembly, a folding device and electronic equipment. The folding mechanism comprises a main shaft, a first rotating arm, a first connecting arm, a first sliding arm, a first swing arm, a first support, a second rotating arm, a second connecting arm, a second sliding arm, a second swing arm and a second support. The rotating end of the first rotating arm is rotatably connected with the spindle, the sliding end of the first rotating arm is slidably connected with the first support, the first end of the first connecting arm is rotatably connected with the spindle, the second end of the first connecting arm is rotatably connected with the first sliding arm, and the first sliding arm is slidably connected with the first support. The first swing arm is rotationally connected with one of the first sliding arm, the first support and the first rotating arm and is movably connected with the other two of the first sliding arm, the first support and the first rotating arm. The stroke difference of the first rotating arm and the first sliding arm relative to the first support is designed and linked with the lever design of the first swing arm, so that the track constant-length design when the first support and the second support rotate relative to the main shaft is achieved, and the service life of the flexible display screen is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of foldable electronic products, and particularly relates to a folding mechanism, a synchronization component, a folding device, and an electronic device. Background Art

[0002] In recent years, due to their characteristics such as being thin, light, and not easily broken, flexible display screens have been widely used in various foldable electronic devices. The foldable electronic device also includes a folding device for carrying the flexible display screen. The folding device generally includes two housings and a folding mechanism connected between the two housings. The two housings are relatively folded or relatively unfolded through the deformation of the folding mechanism, and drive the flexible display screen to fold or unfold.

[0003] In traditional out-foldable electronic devices with screens, when the electronic device is folded, the flexible display screen is located outside the housing device, and the bending part of the flexible display screen is easily pulled by the folding device and damaged, resulting in poor reliability and short service life of the flexible display screen. Summary of the Invention

[0004] This application provides a folding mechanism, a synchronization component, a folding device, and an electronic device. The flexible display screen of the above-mentioned electronic device has a relatively long service life.

[0005] In a first aspect, this application provides a folding mechanism, including a main shaft, a first rotating arm, a first connecting arm, a first sliding arm, a first swinging arm, a first bracket, a second rotating arm, a second connecting arm, a second sliding arm, a second swinging arm, and a second bracket;

[0006] The first rotating arm includes a rotating end and a sliding end. The rotating end of the first rotating arm is rotatably connected to the main shaft, and the sliding end of the first rotating arm is slidably connected to the first bracket. The first connecting arm includes a first end and a second end. The first end of the first connecting arm is rotatably connected to the main shaft, and the second end of the first connecting arm is rotatably connected to the first end of the first sliding arm. The first end of the first sliding arm is slidably connected to the first bracket; the first swinging arm is rotatably connected to one of the first sliding arm, the first bracket, and the first rotating arm, and is respectively movably connected to the other two of them;

[0007] The second rotating arm includes a rotating end and a sliding end. The rotating end of the second rotating arm is rotatably connected to the main shaft, and the sliding end of the second rotating arm is slidably connected to the second bracket. The second connecting arm includes a first end and a second end. The first end of the second connecting arm is rotatably connected to the main shaft, and the second end of the second connecting arm is rotatably connected to the first end of the second sliding arm. The second end of the second sliding arm is slidably connected to the second bracket; the second swinging arm is rotatably connected to one of the second sliding arm, the second bracket, and the second rotating arm, and is respectively movably connected to the other two of them.

[0008] In the embodiment of the present application, by providing a first rotating arm, a first connecting arm, and a first sliding arm, both the first rotating arm and the first sliding arm can rotate relative to the main shaft, and both the first rotating arm and the first sliding arm can slide relative to the first bracket, such that the first bracket can rotate and slide relative to the main shaft.

[0009] Moreover, by forming a lever structure at the joints between the first swing arm and the first sliding arm, the first bracket, and the first rotating arm respectively, the sliding of the first rotating arm relative to the first bracket and the sliding of the first sliding arm relative to the bracket are constrained. At this time, when the first bracket receives a torque relative to the main shaft, the main shaft and the first bracket rotate relative to each other. The first bracket drives the first rotating arm, the first connecting arm, the first sliding arm, and the first swing arm to move. Both the first rotating arm and the first sliding arm slide relative to the first bracket. Since the rotation axes of the first rotating arm and the first sliding arm do not coincide, the sliding distances of the first rotating arm and the first sliding arm relative to the first bracket are different, and there is a travel difference between the first rotating arm and the first sliding arm on the first bracket. Through the lever structure of the first swing arm, this travel difference is realized as the relative displacement between the first bracket and the main shaft, causing the first bracket to approach or move away from the main shaft. Among them, when the first bracket receives a folding torque relative to the main shaft, the first bracket approaches the main shaft; when the first bracket receives an opening torque relative to the main shaft, the first bracket moves away from the main shaft.

[0010] In this embodiment, by providing a second rotating arm, a second connecting arm, and a second sliding arm, both the second rotating arm and the second sliding arm can rotate relative to the main shaft, and both the second rotating arm and the second sliding arm can slide relative to the second bracket; that is, the second bracket can rotate and slide relative to the main shaft.

[0011] Moreover, by forming a lever structure at the joints between the second swing arm and the second sliding arm, the second bracket, and the second rotating arm respectively, the sliding of the second rotating arm relative to the second bracket and the sliding of the second sliding arm relative to the bracket are constrained. At this time, when the second bracket receives a torque relative to the main shaft, the main shaft and the second bracket rotate relative to each other. The second bracket drives the second rotating arm, the second connecting arm, the second sliding arm, and the second swing arm to move synchronously. Both the second rotating arm and the second sliding arm slide relative to the second bracket. Since the rotation axes of the second rotating arm and the second sliding arm do not coincide, the sliding distances of the second rotating arm and the second sliding arm relative to the second bracket are different, and there is a travel difference between the second rotating arm and the second sliding arm on the second bracket. Through the lever structure of the second swing arm, this travel difference is realized as the relative displacement between the second bracket and the main shaft, causing the second bracket to approach or move away from the main shaft. Among them, when the second bracket receives a folding torque relative to the main shaft, the second bracket approaches the main shaft; when the second bracket receives an opening torque relative to the main shaft, the second bracket moves away from the main shaft.

[0012] Therefore, by designing the stroke difference between the first rotating arm and the first sliding arm relative to the first bracket and linking it with the lever design of the first swing arm, the first bracket, the first rotating arm, and the first sliding arm; and by adopting the stroke difference between the second rotating arm and the second sliding arm relative to the second bracket and linking it with the lever design of the second swing arm, the second bracket, the second rotating arm, and the second sliding arm, a constant-length trajectory design of the folding mechanism when the first bracket and the second bracket rotate relative to the main shaft is achieved, increasing the service life of the flexible display screen.

[0013] In some embodiments, the first swing arm is rotatably connected to the first rotating arm, and the first swing arm is movably connected to the first sliding arm and the first bracket;

[0014] The second swing arm is rotatably connected to the second rotating arm, and the second swing arm is movably connected to the second sliding arm and the second bracket.

[0015] In this embodiment, the first swing arm is mounted on the first rotating arm. The first swing arm can slide relative to the first bracket following the first rotating arm. When the first rotating arm and the first sliding arm slide relative to the first bracket, due to the stroke difference between the first rotating arm and the first sliding arm, the first swing arm swings relative to the first rotating arm. At this time, the first rotating arm, the first connecting arm, and the first bracket jointly drive the first swing arm to swing. The rotation center of the first swing arm can be the hole axis of the first swing hole.

[0016] In addition, the second swing arm is mounted on the second rotating arm. The second swing arm can slide relative to the second bracket following the second rotating arm. When the second rotating arm and the second sliding arm slide relative to the second bracket, due to the stroke difference between the second rotating arm and the second sliding arm, the second swing arm swings relative to the second rotating arm. At this time, the second rotating arm, the second connecting arm, and the second bracket jointly drive the second swing arm to swing.

[0017] In some embodiments, the first swing arm includes a first end, a swing portion, and a second end connected in sequence. The first end of the first swing arm is movably connected to the first sliding arm, the swing portion is rotatably connected to the sliding end of the first rotating arm, and the second end of the first swing arm is movably connected to the first bracket; when the first bracket and the second bracket are folded from the open state to the closed state, the first swing arm swings;

[0018] The second swing arm includes a first end, a swing portion, and a second end connected in sequence. The first end of the second swing arm is movably connected to the second sliding arm, the swing portion is rotatably connected to the sliding end of the second rotating arm, and the second end of the second swing arm is movably connected to the second bracket; when the first bracket and the second bracket are folded from the open state to the closed state, the second swing arm swings.

[0019] In this embodiment, the rotation center of the first swing arm is located at the swinging portion, and the first end and the second end of the first swing arm swing relative to the swinging portion; the swinging amplitude of the first swing arm is small, and the occupied space of the first swing arm is small, which is beneficial to the miniaturized design of the folding mechanism.

[0020] In addition, the rotation center of the second swing arm is located at the swinging portion, and the first end and the second end of the second swing arm can swing relative to the swinging portion; the swinging amplitude of the second swing arm is small, and the occupied space of the second swing arm is small, which is beneficial to the miniaturized design of the folding mechanism.

[0021] In some embodiments, the first end of the first swing arm has a first pin shaft, the first sliding arm has a first track groove, and the first pin shaft is slidably connected to the first track groove; the second end of the first swing arm has a second pin shaft, the first bracket has a second track groove, and the second pin shaft is slidably connected to the second track groove;

[0022] The first end of the second swing arm has a third pin shaft, the second sliding arm has a third track groove, and the third pin shaft is slidably connected to the third track groove; the second end of the second swing arm has a fourth pin shaft, the second bracket has a fourth track groove, and the fourth pin shaft is slidably connected to the fourth track groove.

[0023] In this embodiment, the folding mechanism can adjust the relative positions of the joints among the first swing arm, the first bracket, the first rotating arm and the first sliding arm when the first swing arm is at different rotation angles by designing the positions and shapes of the first track groove and the second track groove, so as to control the moving distance of the first bracket relative to the main shaft; the folding mechanism can adjust the relative positions of the joints among the second swing arm, the second bracket, the second rotating arm and the second sliding arm when the second swing arm is at different rotation angles by designing the positions and shapes of the third track groove and the fourth track groove, so as to control the moving distance of the second bracket relative to the main shaft, which is beneficial to realizing the theoretically constant length design during the deformation process of the folding mechanism.

[0024] In some embodiments, the folding mechanism further includes a first limiting member and a first fastening member. The first fastening member fixedly connects the first limiting member and the sliding end of the first rotating arm. The first limiting member abuts against the sliding end of the first rotating arm and forms an annular groove, and a part of the structure of the swinging portion is located in the annular groove.

[0025] In this embodiment, an annular groove is formed by the first limiting member and the sliding end of the first rotating arm, so that the swinging portion of the first rotating arm can rotate in the annular groove, and the structure is simple and easy to manufacture.

[0026] In some embodiments, a first convex column is provided at the sliding end of the first rotating arm, the swinging portion sleeves the first convex column, and the swinging portion is rotatably connected to the first convex column.

[0027] In the present embodiment, the sliding block can rotate relative to the annular groove, enabling the first swing arm to rotate around the first convex post, so that the first swing arm can rotate relative to the first rotating arm, and it is beneficial to improve the rotational accuracy of the relative rotation between the first swing arm and the first rotating arm.

[0028] In some embodiments, the sliding end of the first rotating arm has a first convex portion, the first bracket has a first sliding groove, the first convex portion is slidably connected to the first sliding groove, and the first convex portion is in surface contact with the groove wall of the first sliding groove;

[0029] The sliding end of the second rotating arm has a second convex portion, the second bracket has a second sliding groove, the second convex portion is slidably connected to the second sliding groove, and the second convex portion is in surface contact with the groove wall of the second sliding groove.

[0030] In the present embodiment, due to the surface contact between the first convex portion and the groove wall of the first sliding groove, the sliding connection between the first convex portion and the first sliding groove is more reliable and has less play, and further the sliding connection between the first rotating arm and the first bracket is more reliable and has better mechanical properties. Since a surface contact is formed between the second convex portion and the groove wall of the second sliding groove, the sliding connection between the second convex portion and the second sliding groove is more reliable and has less play, and further the sliding connection between the second rotating arm and the first bracket is more reliable and has better mechanical properties.

[0031] In some embodiments, the main shaft is provided with a first rotating hole and a second rotating hole, and the second rotating hole and the first rotating hole are arranged at intervals in the width direction of the main shaft;

[0032] The rotating end of the first rotating arm is rotatably connected to the first rotating hole, and the rotation axis of the first rotating arm passes through the first rotating hole; the rotating end of the second rotating arm is rotatably connected to the second rotating hole, and the rotation axis of the second rotating arm passes through the second rotating hole.

[0033] In the present embodiment, since the rotation axis of the first rotating arm passes through the first rotating hole, that is, the rotating end of the first rotating arm and the main shaft are rotatably connected by a solid shaft, the connection between the first rotating arm and the main shaft is more reliable and not easily detached; and the structure of the main shaft is compact, the overall volume of the main shaft is small, which is beneficial to the thin design of the main shaft and the folding mechanism. Since the rotation axis of the second rotating arm passes through the second rotating hole, that is, the rotating end of the second rotating arm and the main shaft are rotatably connected by a solid shaft, the connection between the second rotating arm and the main shaft is more reliable and not easily detached; and the structure of the main shaft is compact, the overall volume of the main shaft is small, which is beneficial to the thin design of the main shaft and the folding mechanism.

[0034] In some embodiments, the first bracket has a first connection groove, the first sliding arm has a first sliding portion, and the first sliding portion is in surface contact with the first connection groove;

[0035] The second bracket has a second connection groove, and the second sliding arm has a second sliding part, and the second sliding part is in surface contact with the second connection groove.

[0036] In this embodiment, by making the sliding structure between the first sliding part and the groove wall of the first connection groove be surface sliding, thus, the sliding between the first sliding arm and the first bracket can be made more reliable, the virtual position between the two is small, and the sliding accuracy is high. By making the sliding structure between the second sliding part and the second connection groove be surface sliding, thus, the sliding between the second sliding arm and the second bracket can be made more reliable, the virtual position between the two is small, and the sliding accuracy is high.

[0037] In some embodiments, the axis about which the second end of the first connection arm and the first end of the first sliding arm rotate relative to each other is the first axis. When the first bracket and the second bracket are in the open state, the first axis is located between the main shaft and the first bracket;

[0038] The axis about which the second end of the second connection arm and the first end of the second sliding arm rotate relative to each other is the second axis. When the first bracket and the second bracket are in the open state, the second axis is located between the main shaft and the second bracket.

[0039] In this embodiment, since the first connection arm and the first sliding arm are rotatably connected, and the first axis is located between the main shaft and the first bracket, it is beneficial to flexibly arrange the positions of the first connection arm and the first sliding arm in the folding mechanism, thereby facilitating reducing the structural damage to the main shaft. For example, there is no need to provide a notch structure corresponding to the first sliding arm or the size of the notch structure is small on the side edge of the main shaft in its width direction, so that the main shaft can maintain the integrity of the structure as much as possible and improve the supporting performance of the main shaft.

[0040] In addition, since the second connection arm and the second sliding arm are rotatably connected, and the second axis is located between the main shaft and the second bracket, it is beneficial to flexibly arrange the positions of the second connection arm and the second sliding arm in the folding mechanism, thereby facilitating reducing the structural damage to the main shaft. For example, there is no need to provide a notch structure corresponding to the second sliding arm or the size of the notch structure is small on the side edge of the main shaft in its width direction, so that the main shaft can maintain the integrity of the structure as much as possible and improve the supporting performance of the main shaft.

[0041] In some embodiments, the first end of the first connection arm has a first tooth part, the first end of the second connection arm has a second tooth part, and the first tooth part and the second tooth part are engaged.

[0042] In this embodiment, the first tooth portion of the first connecting arm and the second tooth portion of the second connecting arm can be meshed and connected, so that they can rotate synchronously relative to the main shaft. The first bracket and the main shaft are linked through the first rotating arm, the first connecting arm and the first sliding arm, and the second bracket and the main shaft are linked through the second rotating arm, the second connecting arm and the second sliding arm; both the first bracket and the second bracket can rotate relative to the main shaft, and based on the synchronization of the first connecting arm and the second connecting arm relative to the main shaft, therefore, the first bracket and the second bracket can also rotate synchronously relative to the main shaft. At this time, the first connecting arm, the second connecting arm, the first sliding arm and the second sliding arm not only play the role of connecting the main shaft with the first bracket and the second bracket, but also have a synchronization function, thus eliminating the need to separately set up a synchronization component, simplifying the structure of the folding mechanism, and improving the integration degree of the folding mechanism.

[0043] In some embodiments, the first end of the first connecting arm has a first rotating shaft, the first rotating shaft is coaxial with the first tooth portion, the main shaft is provided with a first transmission hole, and the first rotating shaft is rotatably connected to the first transmission hole; the first end of the second connecting arm has a second rotating shaft, the second rotating shaft is coaxial with the second tooth portion, the main shaft is provided with a second transmission hole, and the second rotating shaft is rotatably connected to the second transmission hole.

[0044] In this embodiment, the first tooth portion and the first rotating shaft are coaxially arranged so that the first tooth portion rotates coaxially with the first rotating shaft and improves the rotation accuracy; in addition, the first connecting arm and the main shaft are rotatably connected by a solid shaft, and the connection structure is more reliable; and the structure of the main shaft is compact, the overall volume of the main shaft is small, which is beneficial to the thin design of the main shaft and the folding mechanism.

[0045] The second tooth portion and the second rotating shaft are coaxially arranged so that the second tooth portion rotates coaxially with the second rotating shaft and improves the rotation accuracy; in addition, the second connecting arm and the main shaft are rotatably connected by a solid shaft, and the connection structure is more reliable; and the structure of the main shaft is compact, the overall volume of the main shaft is small, which is beneficial to the thin design of the main shaft and the folding mechanism.

[0046] In some embodiments, the folding mechanism further includes a connecting member, the connecting member sleeved on the first rotating shaft of the first connecting arm and the second rotating shaft of the second connecting arm, and the connecting member is installed on the main shaft.

[0047] In this embodiment, by providing the connecting member, the first tooth portion of the first connecting arm and the second tooth portion of the second connecting arm are kept in a stable meshing relationship, and the meshing between them is more reliable, so that the first connecting arm and the second connecting arm can rotate synchronously relative to the connecting member, and the synchronous rotation performance is better.

[0048] In some embodiments, the main shaft has a contact surface, one side of the first bracket close to the main shaft has a first transition surface, and one side of the second bracket close to the main shaft has a second transition surface. Both the first transition surface and the second transition surface are arc surfaces. When the first bracket and the second bracket are folded from the open state to the closed state, the first transition surface and the second transition surface approach the contact surface.

[0049] In this embodiment, the arc-shaped first transition surface and second transition surface can gradually fit or separate from the flexible display screen during the deformation process of the folding mechanism to adapt to the deformation of the flexible display screen, reduce the extrusion stress on the flexible display screen, have a better supporting effect on the flexible display screen, and have a higher service life for the flexible display screen. By setting the contact surface, the first transition surface, and the second transition surface, when the folding mechanism is in the closed state, there can be a small gap between the first transition surface and the contact surface; or, the first transition surface can smoothly transition with the contact surface to form a substantially complete surface, thereby having better support.

[0050] In some embodiments, the folding mechanism further includes a third rotating arm, a third swing arm, a fourth rotating arm, and a fourth swing arm;

[0051] The third rotating arm includes a rotating end and a sliding end. The rotating end of the third rotating arm is rotatably connected to the main shaft, and the sliding end of the third rotating arm is slidably connected to the first bracket. The third swing arm is rotatably connected to one of the first sliding arm, the first bracket, and the third rotating arm, and is respectively movably connected to the other two of them;

[0052] The fourth rotating arm includes a rotating end and a sliding end. The rotating end of the fourth rotating arm is rotatably connected to the main shaft, and the sliding end of the fourth rotating arm is slidably connected to the second bracket. The fourth swing arm is rotatably connected to one of the second sliding arm, the second bracket, and the fourth rotating arm, and is respectively movably connected to the other two of them.

[0053] In this embodiment, by setting the third rotating arm, the relative movement between the first bracket and the main shaft is made more stable; by setting the fourth rotating arm, the relative movement between the second bracket and the main shaft can be made more stable. By setting the third swing arm, the torque received by the first sliding arm is balanced, so that the force on the first sliding arm is more balanced and the movement is more stable; by setting the fourth swing arm, the torque received by the second sliding arm is balanced, so that the force on the second sliding arm is more balanced and the movement is more stable.

[0054] In some embodiments, the third rotating arm and the first rotating arm are symmetrically structured in the length direction of the main shaft, the third swing arm and the first swing arm are symmetrically structured in the length direction of the main shaft, the fourth rotating arm and the second rotating arm are symmetrically structured in the length direction of the main shaft, and the fourth swing arm and the second swing arm are symmetrically structured in the length direction of the main shaft.

[0055] In this embodiment, by setting a symmetrical structure, the overall structure of the folding mechanism is more coordinated and has better stress performance.

[0056] Second, the present application provides a folding device, including:

[0057] A first housing;

[0058] A second housing; and

[0059] The folding mechanism provided in any of the above embodiments, the first housing is fixedly connected to the first bracket of the folding mechanism; the second housing is fixedly connected to the second bracket of the folding mechanism.

[0060] In this embodiment, due to the constant trajectory design of the folding mechanism when the first bracket and the second bracket of the folding mechanism rotate relative to the main shaft, the trajectory of the folding device can be kept constant during movement. Thus, when a flexible display screen is installed on the folding device, the service life of the flexible display screen can be extended.

[0061] Third, the present application provides a synchronization component applied to a folding mechanism. The folding mechanism includes a main shaft, a first bracket, and a second bracket. The synchronization component includes: a first connecting arm, a first sliding arm, a second connecting arm, and a second sliding arm;

[0062] The first connecting arm has a first end and a second end. The first end of the first connecting arm has a first tooth portion, and the second end of the first connecting arm is rotatably connected to the first end of the first sliding arm;

[0063] The second connecting arm has a first end and a second end. The first end of the second connecting arm has a second tooth portion, and the second end of the second connecting arm is rotatably connected to the first end of the second sliding arm;

[0064] The first tooth portion and the second tooth portion are meshed and connected;

[0065] The first end of the first connecting arm is used to be rotatably connected to the main shaft, and the second end of the first sliding arm is used to be slidably connected to the first bracket; the first end of the second connecting arm is used to be rotatably connected to the main shaft, and the second end of the second sliding arm is used to be slidably connected to the second bracket.

[0066] In this embodiment, based on the synchronization component of this embodiment, the connection structures between the main shaft and the first bracket, and between the main shaft and the second bracket have low play, resulting in low play in the synchronous rotation of the first bracket and the second bracket and good synchronization.

[0067] In some embodiments, the first end of the first connecting arm has a first rotating shaft, the first rotating shaft is coaxial with the first tooth portion, and the first rotating shaft is used to rotatably connect to the main shaft; the first end of the second connecting arm has a second rotating shaft, the second rotating shaft is coaxial with the second tooth portion, and is used to rotatably connect to the main shaft.

[0068] In this embodiment, the first tooth part and the first rotating shaft are coaxially arranged so that the first tooth part rotates coaxially with the first rotating shaft, improving the rotation accuracy. In addition, the first connecting arm and the main shaft are rotatably connected by a real shaft, and the connecting structure is more reliable.

[0069] The second tooth part and the second rotating shaft are coaxially arranged so that the second tooth part rotates coaxially with the second rotating shaft, improving the rotation accuracy. In addition, the second connecting arm and the main shaft are rotatably connected by a real shaft, and the connecting structure is more reliable.

[0070] In some embodiments, the synchronization assembly further includes a connecting member sleeved on the first rotating shaft of the first connecting arm and the second rotating shaft of the second connecting arm.

[0071] In this embodiment, by providing the connecting member, the first tooth part of the first connecting arm and the second tooth part of the second connecting arm maintain a stable meshing relationship, and the meshing between the two is more reliable. As a result, the first connecting arm and the second connecting arm can rotate synchronously relative to the connecting member, and the synchronous rotation performance is good.

[0072] In some embodiments, the first sliding arm has a first sliding part for forming a surface contact with the main shaft.

[0073] The second sliding arm has a second sliding part for forming a surface contact with the main shaft.

[0074] In this embodiment, by making the sliding structure between the first sliding part and the main shaft a surface sliding, the sliding between the first sliding arm and the first bracket can be made more reliable, with a small virtual position and high sliding accuracy between the two. By making the sliding structure between the second sliding part and the main shaft a surface sliding, the sliding between the second sliding arm and the second bracket can be made more reliable, with a small virtual position and high sliding accuracy between the two.

[0075] Fourthly, the present application provides a folding device, including:

[0076] A first housing;

[0077] A second housing; and

[0078] A folding mechanism, which includes a main shaft, a first bracket, a second bracket, a first connecting mechanism, a second connecting mechanism, and any one of the above synchronization assemblies; the first bracket is fixedly connected to the first housing; the second bracket is fixedly connected to the second housing; the main shaft is connected to the first bracket through the first connecting mechanism; the main shaft is connected to the second bracket through the second connecting mechanism.

[0079] In the present application, when the folding mechanism performs synchronous movement through the synchronization assembly, the virtual position of the synchronous rotation of the first bracket and the second bracket is low, and the synchronization is good, so that the synchronization of the synchronous rotation of the folding device is good.

[0080] In a fifth aspect, the present application provides an electronic device, including: a flexible display screen and a folding device as provided in any of the above embodiments, where the flexible display screen is mounted on a first housing and a second housing of the folding device.

[0081] In the present application, the folding device has a constant trajectory length during movement, thereby increasing the service life of the flexible display screen and making the electronic device have a longer life. BRIEF DESCRIPTION OF THE DRAWINGS

[0082] In order to illustrate the technical solutions in the embodiments of the present application or the background art, the drawings required for use in the embodiments of the present application or the background art will be described below.

[0083] Figure 1 FIG. 13 is a schematic structural diagram of an electronic device provided in an embodiment of the present application when in an open state;

[0084] Figure 2 is Figure 1 FIG. 19 is a schematic structural diagram of the folding device of the electronic device shown when in an open state;

[0085] Figure 3 is Figure 1 FIG. 25 is a schematic structural diagram of the electronic device shown when in a closed state;

[0086] Figure 4 is Figure 1 FIG. 31 is a schematic structural diagram of the folding device of the electronic device shown when in a closed state;

[0087] Figure 5 is Figure 2 FIG. 37 is an exploded structural diagram of the folding device shown;

[0088] Figure 6 is Figure 5 FIG. 43 is a schematic structural diagram of another perspective of the folding device shown;

[0089] Figure 7 is Figure 5 FIG. 49 is a partial schematic structural diagram of the folding mechanism shown when in an open state in some embodiments;

[0090] Figure 8 is Figure 7 FIG. 55 is a schematic structural diagram of the folding mechanism shown when in a closed state;

[0091] Figure 9 is Figure 5 FIG. 61 is a schematic structural diagram of another perspective of the folding mechanism shown;

[0092] Figure 10 is Figure 9 FIG. 67 is an exploded schematic diagram of the folding mechanism shown in some embodiments;

[0093] Figure 11 is Figure 10 a schematic structural view of the spindle shown

[0094] Figure 12 is Figure 11 a schematic exploded view of the spindle shown

[0095] Figure 13 is Figure 10 a schematic structural view of the first bracket and the second bracket in some embodiments shown

[0096] Figure 14 is Figure 10 a schematic structural view of the first rotating arm, the second rotating arm, the third rotating arm and the fourth rotating arm shown

[0097] Figure 15 is Figure 9 a schematic structural view of a partial structure of the folding mechanism shown

[0098] Figure 16 is Figure 15 a sectional view of the folding mechanism shown taken along the A-A section

[0099] Figure 17 is Figure 10 a schematic structural view of the first connecting arm and the second connecting arm shown

[0100] Figure 18 is Figure 10 a schematic structural view of the first sliding arm and the second sliding arm shown

[0101] Figure 19 is Figure 9 a schematic structural view of a partial structure of the folding mechanism shown

[0102] Figure 20 is Figure 9 a schematic structural view of a partial structure of the folding mechanism in the unfolded state shown

[0103] Figure 21 is Figure 20 a sectional view of a partial structure of the folding mechanism shown taken along the B-B section

[0104] Figure 22 is Figure 9 a schematic structural view of a partial structure of the folding mechanism shown

[0105] Figure 23 is Figure 22 a schematic exploded view of a partial structure of the folding mechanism shown

[0106] Figure 24 is Figure 22 a sectional view of a partial structure of the folding mechanism shown taken along the C-C section

[0107] Figure 25 is Figure 9 A schematic structural view of a partial structure of the folding mechanism shown;

[0108] Figure 26 is Figure 9 Another schematic structural view of the folding mechanism shown;

[0109] Figure 27 is Figure 26 A cross-sectional view of a partial structure of the folding mechanism shown;

[0110] Figure 28 is Figure 9 A schematic structural view of a partial structure of the folding mechanism in the open state shown;

[0111] Figure 29 is Figure 9 A cross-sectional view of a partial structure of the folding mechanism in the closed state shown. Detailed implementation manners

[0112] The following describes each of the following embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application.

[0113] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that they are connected to each other and the relative position relationship after connection remains unchanged. "Rotational connection" means that they are connected to each other and can rotate relative to each other after connection. "Sliding connection" means that they are connected to each other and can slide relative to each other after connection. The orientation terms mentioned in the embodiments of the present application, for example, "upper", "lower", "left", "right", "inner", "outer", etc., are only with reference to the direction of the accompanying drawings. Therefore, the orientation terms used are for better and clearer description and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the embodiments of the present application. "Plurality" means at least two. "And / or" is a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone these three situations.

[0114] Embodiments of the present application provide an electronic device, which includes a folding device and a flexible display screen fixed to the folding device. The folding device can be unfolded to an open state, folded to a closed state, or in an intermediate state between the open state and the closed state. The flexible display screen unfolds and folds with the folding device. By optimizing the folding mechanism of the folding device, the electronic device enables the folding device to rotate with the flexible display screen as the neutral plane, thereby reducing the risk of pulling or squeezing the flexible display screen, protecting the flexible display screen, improving the reliability of the flexible display screen, and enabling the flexible display screen and the electronic device to have a long service life.

[0115] In some embodiments, the electronic device can be a foldable electronic product such as a mobile phone, a tablet computer, a laptop computer, a wearable device, etc. The wearable device can be a smart watch, a smart bracelet, etc. Embodiments of the present application will be described by taking the electronic device as a mobile phone as an example.

[0116] Please refer to Figures 1 to 4 , Figure 1 which is a schematic structural diagram of an electronic device 1000 provided by an embodiment of the present application when in an open state, Figure 2 and is Figure 1 a schematic structural diagram of the folding device 100 of the electronic device 1000 shown when in an open state, Figure 3 and is Figure 1 a schematic structural diagram of the electronic device 1000 shown when in a closed state, Figure 4 and is Figure 1 a schematic structural diagram of the folding device 100 of the electronic device 1000 shown when in a closed state.

[0117] In some embodiments, the electronic device 1000 includes a folding device 100 and a flexible display screen 200. Among them, the folding device 100 includes a first housing 10, a folding mechanism 20, and a second housing 30 connected in sequence. The folding mechanism 20 can be deformed so that the first housing 10 and the second housing 30 can be folded or unfolded relative to each other.

[0118] As Figure 1 and Figure 2 shown, the first housing 10 and the second housing 30 can be unfolded relative to each other to an open state, so that the electronic device 1000 is in an open state. Exemplarily, when the first housing 10 and the second housing 30 are in the open state, the angle between them can be approximately 180° (a slight deviation is also allowed, such as 165°, 177°, or 185°). At this time, the electronic device 1000 has a larger width dimension, and the planar dimension of the electronic device 1000 is large, providing a better user experience.

[0119] As Figure 3 and Figure 4 ​As shown, the first housing 10 and the second housing 30 can be relatively folded to a closed state so that the electronic device 1000 is in a closed state. Exemplarily, when the first housing 10 and the second housing 30 are in the closed state, they can be completely closed and parallel to each other (a slight deviation is also allowed), and there may be no gap or a small gap between the first housing 10 and the second housing 30. At this time, the electronic device 1000 has a small width dimension, which is convenient for the user to store and hold the electronic device 1000.

[0120] In some embodiments, the electronic device 1000 can also be in an intermediate state between the open state and the closed state. At this time, the angle between the first housing 10 and the second housing 30 can be greater than the included angle when they are in the closed state and less than the included angle when they are in the open state. Therefore, the electronic device 1000 can be switched between the open state, the intermediate state, and the closed state through the deformation of the folding mechanism 20.

[0121] In some embodiments, the flexible display screen 200 is used to display images. Exemplarily, the flexible display screen 200 can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a micro organic light-emitting diode display screen, or a quantum dot light-emitting diode (QLED) display screen.

[0122] Exemplarily, the flexible display screen 200 can include a first part 2001, a second part 2002, and a third part 2003 arranged in sequence. The flexible display screen 200 is fixed to the folding device 100. For example, the flexible display screen 200 can be bonded to the folding device 100 through an adhesive layer. The first part 2001 of the flexible display screen 200 is fixed to the first housing 10, and the third part 2003 is fixed to the second housing 30. During the relative folding or relative unfolding of the first housing 10 and the second housing 30, the second part 2002 deforms. Among them, the second part 2002 can correspond to the position of the folding mechanism 20, and when the folding mechanism 20 deforms, the second part 2002 can deform correspondingly.

[0123] Such asFigure 1 As shown, when the first housing 10 and the second housing 30 are in the open state, the flexible display screen 200 is in the open form. At this time, the first part 2001, the second part 2002, and the third part 2003 can be coplanar, so that the flexible display screen 200 can be in a flat or approximately flat shape, with a large display area and a better user experience.

[0124] As Figure 3 shown, when the first housing 10 and the second housing 30 are in the closed state, the flexible display screen 200 is in the closed form. At this time, the first part 2001 and the third part 2003 can be in a parallel or approximately parallel state, and the second part 2002 is in a bent state. At this time, the electronic device 1000 is in the closed state, and the flexible display screen 200 is located outside the folding device 100. The flexible display screen 200 can be generally in a U shape. At this time, the flexible display screen 200 can perform double-sided display according to the usage scenario (that is, both the first part 2001 and the third part 2003 display images), or can perform single-sided display (that is, the first part 2001 or the third part 2003 displays images) to improve the user experience. It can be understood that in this embodiment, the specific display mode of the flexible display screen 200 in various forms is not strictly limited.

[0125] In some embodiments, when the first housing 10 and the second housing 30 are in an intermediate state, the flexible display screen 200 is in an intermediate form between the open form and the closed form.

[0126] In this embodiment, the flexible display screen 200 can be unfolded or folded along with the folding device 100. When the electronic device 1000 is in the open state, the flexible display screen 200 is in a flattened form and can perform full-screen display, so that the electronic device 1000 has a large display area to improve the user's viewing experience. When the electronic device 1000 is in the closed state, the planar size of the electronic device 1000 is small (with a small width dimension), which is convenient for the user to carry and store.

[0127] In some embodiments, as Figure 2 shown, the first housing 10 of the folding device 100 can have a first support surface 101. The first support surface 101 can be located on the top side surface of the first housing 10. The first support surface 101 can be a plane, and the first support surface 101 is used to support a part of the structure of the flexible display screen 200. The first support surface 101 can be fixedly connected to the corresponding part of the flexible display screen 200. For example, it can be bonded through an adhesive layer.

[0128] The second housing 30 may have a second supporting surface 301. The second supporting surface 301 may be located on the top side of the second housing 30, and the second supporting surface 301 may be a plane. The second supporting surface 301 is used to support a part of the structure of the flexible display screen 200. The second supporting surface 301 may be fixedly connected to the corresponding part of the flexible display screen 200, for example, by bonding through an adhesive layer. In some other embodiments, one of the first housing 10 and the second housing 30 may be movably connected to the flexible display screen 200, and the other may be fixedly connected to the flexible display screen 200.

[0129] In some embodiments, the electronic device 1000 may further include multiple modules (not shown in the figure), and the multiple modules may be stored inside the folding device 100. The multiple modules of the electronic device 1000 may include but are not limited to a mainboard, a processor, a memory, a battery, a camera module, an earpiece module, a speaker module, a microphone module, an antenna module, a sensor module, etc. The embodiment of the present application does not specifically limit the number, type, position, etc. of the modules of the electronic device 1000.

[0130] It is understandable that when the user holds the electronic device 1000, the position of the earpiece module of the electronic device 1000 can be defined as the upper side of the electronic device 1000, the position of the microphone module of the electronic device 1000 can be defined as the lower side of the electronic device 1000, and the two sides of the electronic device 1000 held by the left and right hands of the user can be defined as the left and right sides of the electronic device 1000. In some embodiments, the electronic device 1000 can be folded in half left and right. In some other embodiments, the electronic device 1000 can be folded in half up and down.

[0131] It is understandable that this embodiment is described by taking "the rotation axis of the electronic device 1000 is parallel to the length direction of the electronic device 1000" as an example. In this case, the electronic device 1000 can rotate left and right, and the folding and unfolding of the electronic device 1000 affects the width dimension of the electronic device 1000. In the relevant description of the electronic device 1000, the side of the electronic device 1000 with the flexible display screen 200 is the "top", and the side of the electronic device 1000 away from the flexible display screen 200 is the "bottom". In some other embodiments, the rotation axis of the electronic device 1000 may also be parallel to the width direction of the electronic device 1000. In this case, the electronic device 1000 can rotate up and down, and the folding and unfolding of the electronic device 1000 affects the length dimension of the electronic device 1000.

[0132] Please refer to Figure 2 , Figure 5 and Figure 6 , Figure 5 yes Figure 2 The exploded structural diagram of the folding device 100 is shown in FIG.Figure 6 Yes Figure 5 It is a schematic structural diagram of another perspective of the folding device 100 shown in Figure 6 The perspective in which the folding device 100 is located is Figure 5 The perspective after the folding device 100 shown in

[0133] In some embodiments, the folding mechanism 20 can be respectively connected to the first housing 10 and the second housing 30. Among them, the width direction (X direction) of the folding mechanism 20 can be the direction extending from the first housing 10 to the second housing 30, the length direction (Y direction) of the folding mechanism 20 can be the same as the axis direction of the relative rotation of the first housing 10 and the second housing 30, and the thickness direction (Z direction) of the folding mechanism 20 can be perpendicular to its length direction and width direction.

[0134] In some embodiments, as Figure 5 and Figure 6 shown, the folding mechanism 20 can include a first bracket 1, a first connection mechanism 2, a main shaft 3, a second connection mechanism 4, and a second bracket 5. Among them, the first bracket 1 and the main shaft 3 can be connected through the first connection mechanism 2, and the first connection mechanism 2 can be a deformable mechanism. Through the deformation of the first connection mechanism 2, the first bracket 1 can be rotated relative to the main shaft 3. Among them, the second bracket 5 and the main shaft 3 can be connected through the second connection mechanism 4, and the second connection mechanism 4 can be a deformable mechanism. Through the deformation of the second connection mechanism 4, the second bracket 5 can be rotated relative to the main shaft 3. Among them, the first bracket 1 can be fixedly connected to the first housing 10, and the second bracket 5 can be fixedly connected to the second housing 30. By providing the first connection mechanism 2 and the second connection mechanism 4, the relative rotation between the first bracket 1 and the second bracket 5 can be realized, so that the first housing 10 and the second housing 30 can rotate relative to each other, thereby realizing the unfolding and folding of the electronic device 1000.

[0135] Exemplarily, as Figure 2 and Figure 5 shown, the first bracket 1 can include a first mounting portion 11. Among them, the first mounting portion 11 can be located at one end of the first bracket 1 away from the main shaft 3. The first housing 10 can be provided with a first mounting groove 102, and the first mounting portion 11 can be fixedly mounted in the first mounting groove 102, thereby fixing the first housing 10 and the first bracket 1. For example, the first mounting portion 11 can be fixedly mounted in the first mounting groove 102 through fasteners such as screws. The present embodiment does not strictly limit the mounting method of the first mounting portion 11. The shape of the first mounting groove 102 can be adapted to the shape of the first mounting portion 11 to facilitate the mounting of the first mounting portion 11. The first mounting groove 102 can be located on the top side of the first housing 10, and the top side of the first housing 10 can be facing the flexible display screen 200 (refer to Figure 1) side. Wherein, the top side surface 111 of the first mounting portion 11 can be exposed relative to the first support surface 101 of the first housing 10. For example, at least a partial region of the top side surface 111 of the first mounting portion 11 can be flush with the first support surface 101 and can have a smooth transition, so that the first support surface 101 and the top side surface 111 of the first mounting portion 11 jointly support the flexible display screen 200, thereby enabling the folding device 100 to better support the flexible display screen 200.

[0136] In addition, as Figure 2 and Figure 5 shown, the second bracket 5 can include a second mounting portion 51. Wherein, the second mounting portion 51 can be located at one end of the second bracket 5 away from the main shaft 3. The second housing 30 can be provided with a second mounting groove 302, and the second mounting portion 51 can be fixedly mounted in the second mounting groove 302, thereby fixing the second housing 30 and the second bracket 5. For example, the second mounting portion 51 can be fixedly mounted in the second mounting groove 302 through fasteners such as screws. The present embodiment does not strictly limit the mounting manner of the second mounting portion 51. The shape of the second mounting groove 302 can be adapted to the shape of the second mounting portion 51 to facilitate the mounting of the second mounting portion 51. The second mounting groove 302 can be located on the top side of the second housing 30, and the top side of the second housing 30 can be the side facing the flexible display screen 200. Wherein, the top side surface 511 of the second mounting portion 51 can be exposed relative to the second support surface 301 of the second housing 30. For example, at least a partial region of the top side surface 511 of the second mounting portion 51 can be flush with the second support surface 301 and can have a smooth transition, so that the second support surface 301 and the top side surface 511 of the second mounting portion 51 jointly support the flexible display screen 200, thereby enabling the folding device 100 to better support the flexible display screen 200.

[0137] Exemplarily, as Figure 6 shown, the first connecting mechanism 2 and the second connecting mechanism 4 can be symmetrically arranged relative to the main shaft 3, so that the first bracket 1 and the second bracket 5 move mirror-symmetrically relative to the main shaft 3. Wherein, the first connecting mechanism 2 and the second connecting mechanism 4 can constitute a set of driving components. Wherein, the folding mechanism 20 can be provided with multiple sets of driving components, and the multiple sets of driving components can be arranged along the length direction of the main shaft 3. The length direction of the main shaft 3 can be parallel to the length direction (Y direction) of the folding mechanism 20, the thickness direction of the main shaft 3 can be the same as the thickness direction (Z direction) of the folding mechanism 20, and the width direction of the main shaft 3 is perpendicular to its length direction and width direction (i.e., parallel to the X direction).

[0138] Wherein, the number of the driving components can be 2 sets, 3 sets, 4 sets, etc., making the movement between the first housing 10 and the second housing 30 more reliable.

[0139] Among them, multiple sets of driving components can have the same structure, mirror symmetry structure, central symmetry structure, or other different structures, and this embodiment does not strictly limit this.

[0140] In some other examples, the folding mechanism 20 may further include a synchronization component. The synchronization component can be installed on the main shaft 3. The synchronization component can be connected to the first bracket 1 and the second bracket 5. The synchronization component is used to make the first bracket 1 and the second bracket 5 move synchronously relative to the main shaft 3, so that the first housing 10 and the second housing 30 rotate relative to each other synchronously, thereby facilitating the unfolding and folding of the electronic device 1000.

[0141] Please refer to Figure 7 and Figure 8 , Figure 7 is Figure 5 a partial structural schematic diagram of the folding mechanism 20 shown in the open state in some embodiments, Figure 8 is Figure 7 a structural schematic diagram of the folding mechanism 20 shown in the closed state.

[0142] In some embodiments, the main shaft 3 may have a contact surface 310. The contact surface 310 is located on the side of the main shaft 3 facing the flexible display screen 200 (refer to Figure 1 ), and the contact surface 310 is used to support the flexible display screen 200. Exemplarily, the contact surface 310 may include a first arc surface 311, a flat surface 312, and a second arc surface 313 that are connected in sequence. Among them, the first arc surface 311 and the second arc surface 313 are bent towards the same side of the flat surface 312 relative to the flat surface 312.

[0143] In this embodiment, the contact surface 310 can be attached to the flexible display screen 200 during the deformation process of the folding mechanism 20 to adapt to the deformation of the flexible display screen 200, and the support effect on the flexible display screen 200 is better. In some other embodiments, the contact surface 310 can be an arc surface, and the central angle of the contact surface 310 can be in the range of 60° to 150°, and this embodiment does not strictly limit this. In the embodiments of the present application, the specific shape of the contact surface 310 is not strictly limited.

[0144] In some embodiments, the first bracket 1 may further include a first bending portion 12. Among them, the first bending portion 12 can be located on the side of the first bracket 1 close to the main shaft 3, and the first bending portion 12 can be bent from the top side of the first bracket 1 towards the bottom side. The first bending portion 12 is fixedly connected to the first mounting portion 11.

[0145] Exemplarily, the first bending portion 12 may have a first transition surface 121. The first transition surface 121 is located on the top side of the first bending portion 12 and is used to support the flexible display screen 200. Among them, the first transition surface 121 may be an arc surface. When the folding mechanism 20 is in the closed state, there may be a small gap between the first transition surface 121 and the contact surface 310; or, the first transition surface 121 may be smoothly transitioned with the contact surface 310 to form a substantially complete surface, so as to have better supportability.

[0146] In this embodiment, the arc-shaped first transition surface 121 can be gradually attached to or separated from the flexible display screen 200 during the deformation process of the folding mechanism 20 to adapt to the deformation of the flexible display screen 200, reduce the extrusion stress on the flexible display screen 200, have a better support effect on the flexible display screen 200, and the service life of the flexible display screen 200 is higher.

[0147] In some embodiments, the second bracket 5 may further include a second bending portion 52. The second bending portion 52 may be located on the side of the second bracket 5 close to the main shaft 3, and the second bending portion 52 may be bent from the top side to the bottom side of the second bracket 5. The second bending portion 52 is fixedly connected to the second mounting portion 51.

[0148] Exemplarily, the second bending portion 52 may have a second transition surface 521. The second transition surface 521 is located on the top side of the second bending portion 52 and is used to support the flexible display screen 200. The second transition surface 521 may be an arc surface. When the first bracket 1 and the second bracket 5 are folded from the open state to the closed state, the first transition surface 121 and the second transition surface 521 approach the contact surface 310; when in the closed state, there may be a small gap between the second transition surface 521 and the contact surface 310; or, the second transition surface 521 may be smoothly transitioned with the contact surface 310 to form a substantially complete surface, so as to have better supportability.

[0149] In this embodiment, the arc-shaped second transition surface 521 can be gradually attached to or separated from the flexible display screen 200 (refer to Figure 1 ) during the deformation process of the folding mechanism 20 to adapt to the deformation of the flexible display screen 200, reduce the extrusion stress on the flexible display screen 200, have a better support effect on the flexible display screen 200, and the service life of the flexible display screen 200 is higher.

[0150] In some embodiments, such as Figure 7As shown, when the folding mechanism 20 is in the open state, the main shaft 3 can be located between the first bending portion 12 of the first bracket 1 and the second bending portion 52 of the second bracket 5, and there can be a gap between the main shaft 3 and the first bracket 1 and the second bracket 5. At this time, the top side surfaces 111 of the first mounting portion 11 and 511 of the second mounting portion 51 can be coplanar. The highest point of the contact surface 310 of the main shaft 3 facing the top side can be flush with the top side surfaces 111 of the first mounting portion 11 and 511 of the second mounting portion 51 to jointly support the flexible display screen 200, so that the flexible display screen 200 (refer to Figure 1 ) is in a planar form. The first transition surface 121 and the second transition surface 521 can be lower than the top side surfaces 111 of the first mounting portion 11 and 511 of the second mounting portion 51. Among them, the contact surface 310, the first transition surface 121, and / or the second transition surface 521 can also assist in supporting the flexible display screen 200.

[0151] In some embodiments, as Figure 8 shown, when the folding mechanism 20 is in the closed state. The main shaft 3 can be located between the first bending portion 12 of the first bracket 1 and the second bending portion 52 of the first bracket 1, and there can be no gap or a small gap between the main shaft 3 and the first bending portion 12 and the second bending portion 52 of the first bracket 1, so that the first transition surface 121, the contact surface 310, and the second transition surface 521 are spliced to form an approximately complete curved surface, thereby providing better support for the flexible display screen 200.

[0152] Exemplarily, when the contact surface 310 includes a first arc surface 311, a plane 312, and a second arc surface 313 connected in sequence, at this time, during the process of gradually unfolding or gradually closing the folding mechanism 20, the first arc surface 311 and the second arc surface 313 can provide good support for the flexible display screen 200 (refer to Figure 1 ), preventing the local bending angle of the flexible display screen 200 from being too small, and further preventing the flexible display screen 200 from generating extrusion stress. When the folding mechanism 20 is in the open state, the plane 312 can increase the contact area between the contact surface 310 and the flexible display screen 200, providing better support performance for the flexible display screen 200.

[0153] Or, when the contact surface 310 is an arc surface, at this time, the arc surfaces of the first transition surface 121, the contact surface 310, and the second transition surface 521 can be coaxial, that is, the three can form an approximately complete arc surface to fit well with the flexible display screen 200 (please refer to Figure 1 ), preventing the flexible display screen 200 from being locally pulled, so that the folding mechanism 20 can better support the flexible display screen 200.

[0154] In some embodiments, when the folding mechanism 20 is folded from the open state to the closed state, the gap between the main shaft 3 and the first bracket 1 and the second bracket 5 gradually decreases, that is, the first transition surface 121 and the second transition surface 521 gradually approach the contact surface 310, so as to maintain a constant-length support for the flexible display screen 200.

[0155] In some other embodiments, the folding mechanism 20 may include a support member (not shown in the figure), and the support member can be set according to requirements. The support member may include a first support member and a second support member. The first support member and the second support member may be symmetrically arranged relative to the main shaft 3. Taking the first support member as an example. The first support member is located on the top side of the first bracket 1. The first support member may be fixedly connected to the first mounting portion 11 and be close to or in contact with the contact surface 310 of the main shaft 3. During the process of the first bracket 1 and the second bracket 5 being unfolded from the closed state to the open state, the first support member is always close to or in contact with the main shaft 3 to shield the gap between the first bracket 1 and the main shaft 3. It is easy to understand that when the folding mechanism 20 is in the open state, the first support member can also shield the gap between the first bracket 1 and the main shaft 3. At this time, the first support member can contact the flexible display screen 200 (see Figure 1 ), support the flexible display screen 200, so that the folding mechanism 20 can better support the flexible display screen 200 during the unfolding and closing processes.

[0156] Please refer to Figure 9 and Figure 10 , Figure 9 is Figure 5 a schematic structural diagram of another perspective of the folding mechanism 20 shown, Figure 10 is Figure 9 an exploded schematic diagram of the folding mechanism 20 shown in some embodiments.

[0157] In some embodiments, the first connection mechanism 2 may include a first rotating arm 21, a first connecting arm 22, a first sliding arm 23, and a first swinging arm 24. The second connection mechanism 4 may include a second rotating arm 41, a second connecting arm 42, a second sliding arm 43, and a second swinging arm 44.

[0158] Exemplarily, one end of the first rotating arm 21 is connected to the main shaft 3, and the other end is connected to the first bracket 1; one end of the first connecting arm 22 is connected to the main shaft 3, the other end of the first connecting arm 22 is connected to one end of the first sliding arm 23, the other end of the first sliding arm 23 is connected to the first bracket 1, the middle of the first swinging arm 24 is connected to the first rotating arm 21, one end of the first swinging arm 24 is connected to the first sliding arm 23, and the other end of the first swinging arm 24 is connected to the first bracket 1.

[0159] In this example, by setting the connection relationships among the first rotating arm 21, the first connecting arm 22, the first sliding arm 23, and the first swinging arm 24 in the first connecting mechanism 2, the first rotating arm 21, the first connecting arm 22, the first sliding arm 23, and the first swinging arm 24 can move in coordination with each other, so that the main shaft 3 and the first bracket 1 are movably connected, which is beneficial to realizing the relative movement between the main shaft 3 and the first bracket 1.

[0160] Exemplarily, one end of the second rotating arm 41 is connected to the main shaft 3, and the other end is connected to the second bracket 5; one end of the second connecting arm 42 is connected to the main shaft 3, the other end of the second connecting arm 42 is connected to one end of the second sliding arm 43, the other end of the second sliding arm 43 is connected to the second bracket 5, the middle part of the second swinging arm 44 is connected to the second rotating arm 41, one end of the second swinging arm 44 is connected to the second sliding arm 43, and the other end of the second swinging arm 44 is connected to the second bracket 5.

[0161] In this example, by setting the connection relationships among the second rotating arm 41, the second connecting arm 42, the second sliding arm 43, and the second swinging arm 44 in the second connecting mechanism 4, the second rotating arm 41, the second connecting arm 42, the second sliding arm 43, and the second swinging arm 44 can move in coordination with each other, so that the main shaft 3 and the second bracket 5 are movably connected, which is beneficial to realizing the relative movement between the main shaft 3 and the second bracket 5.

[0162] Exemplarily, the first connecting mechanism 2 and the second connecting mechanism 4 can be symmetric structures relative to the main shaft 3. Through the structural settings of the first connecting mechanism 2 and the second connecting mechanism 4, both the first bracket 1 and the second bracket 5 can rotate relative to the main shaft 3, so as to realize the opening and closing between the first bracket 1 and the second bracket 5.

[0163] In some embodiments, the first connecting mechanism 2 may further include a third rotating arm 25 and a third swinging arm 26. One end of the third rotating arm 25 is connected to the main shaft 3, and the other end is connected to the first bracket 1. The middle part of the third swinging arm 26 is connected to the third rotating arm 25, one end of the third swinging arm 26 is connected to the first sliding arm 23, and the other end of the third swinging arm 26 is connected to the first bracket 1.

[0164] In this embodiment, the third swinging arm 26 and the first swinging arm 24 can be commonly connected to the same first sliding arm 23, so as to balance the force on the first sliding arm 23, prevent the first sliding arm 23 from jamming when sliding relative to the first bracket 1, reduce wear, and improve the smoothness and reliability of the movement of the first connecting mechanism 2.

[0165] Exemplarily, the structure of the third rotating arm 25 may be symmetric to the structure of the first rotating arm 21, and the structure of the third swing arm 26 may be symmetric to the structure of the first swing arm 24, making the overall structure of the folding mechanism 20 more coordinated and having better force-bearing performance. In the embodiments of the present application, the structures of the first rotating arm 21 and the first swing arm 24 are mainly used for exemplary illustration, and the structures of the third rotating arm 25 and the third swing arm 26 will not be elaborated further.

[0166] In some embodiments, the second connecting mechanism 4 may further include a fourth rotating arm 45 and a fourth swing arm 46. One end of the fourth rotating arm 45 is connected to the main shaft 3, and the other end is connected to the second bracket 5. The middle of the fourth swing arm 46 is connected to the fourth rotating arm 45. One end of the fourth swing arm 46 is connected to the second sliding arm 43, and the other end of the fourth swing arm 46 is connected to the second bracket 5.

[0167] In this embodiment, the fourth swing arm 46 and the second swing arm 44 may be commonly connected to the same second sliding arm 43, so as to balance the force on the second sliding arm 43, prevent the second sliding arm 43 from jamming when sliding relative to the second bracket 5, reduce wear, and improve the smoothness and reliability of the movement of the second connecting mechanism 4.

[0168] Exemplarily, the structure of the fourth rotating arm 45 may be symmetric to the structure of the second rotating arm 41, and the structure of the fourth swing arm 46 may be symmetric to the structure of the second swing arm 44, making the overall structure of the folding mechanism 20 more coordinated and having better force-bearing performance. In the embodiments of the present application, the structures of the second rotating arm 41 and the second swing arm 44 are mainly used for exemplary illustration, and the structures of the fourth rotating arm 45 and the fourth swing arm 46 will not be elaborated further.

[0169] Please continue to refer to Figure 10 , in some embodiments, exemplarily, the folding mechanism 20 may further include a first rotating shaft 61, a second rotating shaft 62, a third rotating shaft 63, and a fourth rotating shaft 64. The above-mentioned several rotating shafts are used to realize the rotational connection relationship between two structures. Among them, the first rotating shaft 61, the second rotating shaft 62, the third rotating shaft 63, and the fourth rotating shaft 64 may all be cylindrical shafts. Among them, the surfaces of the first rotating shaft 61, the second rotating shaft 62, the third rotating shaft 63, and the fourth rotating shaft 64 may be hardened to improve their wear resistance. In some examples, the structures and dimensions of the first rotating shaft 61, the second rotating shaft 62, the third rotating shaft 63, and the fourth rotating shaft 64 may be the same, and this embodiment does not strictly limit this.

[0170] In some embodiments, the folding mechanism 20 may further include a first connecting shaft 71 and a second connecting shaft 72. The above-mentioned connecting shafts are used to achieve the rotational connection relationship between two structures. Among them, the first connecting shaft 71 and the second connecting shaft 72 may both be cylindrical shafts. Among them, the first connecting shaft 71 and the second connecting shaft 72 can both be hardened on the surface to improve wear resistance. In some examples, the structures and dimensions of the first connecting shaft 71 and the second connecting shaft 72 may be the same, and this embodiment does not strictly limit this.

[0171] In some embodiments, the folding mechanism 20 may further include a connecting member 8. Among them, the number of the connecting members 8 may be two, and the connecting member 8 may be a plate-like structure.

[0172] Please refer to Figure 11 , Figure 11 is Figure 10 the schematic structural diagram of the main shaft 3 shown in

[0173] In some embodiments, the main shaft 3 may be provided with a first rotation hole 31 and a second rotation hole 32. The first rotation hole 31 and the second rotation hole 32 are arranged at intervals in the width direction (i.e., the X direction) of the main shaft 3, and the axes of the first rotation hole 31 and the second rotation hole 32 may be parallel to the length direction of the main shaft 3 (i.e., the Y direction).

[0174] In some embodiments, the main shaft 3 may further be provided with a first transmission hole 33 and a second transmission hole 34. The first transmission hole 33 and the second transmission hole 34 are arranged at intervals in the width direction (i.e., the Y direction) of the main shaft 3, and the axes of the first transmission hole 33 and the second transmission hole 34 may be parallel to the length direction of the main shaft 3. In the length direction of the main shaft, the first transmission hole 33 and the second transmission hole 34 may be arranged on one side of the first rotation hole 31 and the second rotation hole 32. Among them, the distance between the first transmission hole 33 and the second transmission hole 34 may be smaller than the distance between the first rotation hole 31 and the second rotation hole 32.

[0175] In some embodiments, the main shaft 3 may further be provided with a third rotation hole 35 and a fourth rotation hole 36. The third rotation hole 35 may be arranged in the length direction of the main shaft 3 with the first rotation hole 31 and may be symmetrically distributed. The fourth rotation hole 36 may be arranged in the length direction of the main shaft 3 with the second rotation hole 32 and may be symmetrically distributed. At this time, the sizes of the first rotation hole 31, the second rotation hole 32, the third rotation hole 35, and the fourth rotation hole 36 may be the same. In some other embodiments, the main shaft 3 may not have the third rotation hole 35 and the fourth rotation hole 36, and this embodiment does not strictly limit this.

[0176] Please refer to Figures 10 to 12 , Figure 12 is Figure 11 the exploded schematic diagram of the main shaft 3 shown in

[0177] In some embodiments, the main shaft 3 may include a main outer shaft 37, a fixing member 38, and a fastening member 39.

[0178] Exemplarily, the main outer shaft 37 may have an inner surface and a contact surface 310 as described above. The inner surface and the contact surface 310 may be disposed opposite to each other, and the inner surface may be a plane.

[0179] Exemplarily, the main outer shaft 37 may be provided with relief grooves 371. The number of the relief grooves 371 may be two, and the two relief grooves 371 may be symmetrically disposed in the width direction of the main shaft 3. The relief grooves 371 may be located at the edges on the left and right sides of the main outer shaft 37. Among them, a protrusion 3711 may be formed between the left relief groove 371 and the right relief groove 371. Among them, the two relief grooves 371 may form a group, and the main outer shaft 37 may be provided with two groups of relief grooves 371. The two groups of relief grooves 371 may be arranged along the length direction of the main outer shaft 37, and the length direction of the main outer shaft 37 may be the same as the length direction of the main shaft 3. The relief grooves 371 may form an installation space and / or a movement space. At least part of the wall surface of the relief grooves 371 may be disposed facing away from the contact surface 310, and at least part of the wall surface of the relief grooves 371 may be arc-shaped.

[0180] Exemplarily, the main outer shaft 37 may be provided with a first half groove 372 and a second half groove 373. The first half groove 372 and the second half groove 373 may be disposed facing away from the contact surface 310 and form an opening on the inner surface of the main outer shaft 37. In some examples, two first half grooves 372 may be arranged in the length direction of the main shaft 3, and two second half grooves 373 may be arranged in the length direction of the main shaft 3. In some examples, the first half groove 372 and the second half groove 373 may be symmetrically disposed in the width direction of the main shaft 3. Both the first half groove 372 and the second half groove 373 may be semi-circular grooves or groove positions approximately in the shape of semi-circular grooves.

[0181] Exemplarily, the main outer shaft 37 may be provided with a first movable space 374 and a second movable space 375. The first movable space 374 and the second movable space 375 may be disposed facing away from the contact surface 310 and form an opening on the inner surface of the main outer shaft 37. The first movable space 374 and the second movable space 375 may be located in the middle of the main outer shaft 37. Among them, the first half groove 372 may communicate with the first movable space 374, and the second half groove 373 may communicate with the second movable space 375. The grooving depth of the first half groove 372 and the second half groove 373 may be less than the grooving depth of the first movable space 374 and the second movable space 375. The first movable space 374 is used to provide a movable space for the components installed in the first half groove 372, and the second movable space 375 is used to provide a movable space for the components installed in the second half groove 373.

[0182] Exemplarily, the main outer shaft 37 may be provided with a first avoidance space 376 and a second avoidance space 377. The first avoidance space 376 and the second avoidance space 377 are arranged facing away from the contact surface 310 and are respectively located at the edges of the main outer shaft 37. The first avoidance space 376 may be arranged adjacent to the first movable space 374, and the second avoidance space 377 may be arranged adjacent to the second movable space 375.

[0183] Exemplarily, the main outer shaft 37 may be provided with a plurality of fixing holes 378. The axis of the fixing holes 378 may be perpendicular to the inner surface of the main outer shaft 37. The fixing holes 378 may be blind holes or through holes, and the fixing holes 378 may have internal threads.

[0184] Exemplarily, the main outer shaft 37 may have an up-down symmetric structure in the length direction of the main shaft 3 and may also have a left-right symmetric structure in the width direction of the main shaft 3. At this time, the main outer shaft 37 is relatively easy to manufacture and has a better stress condition during operation.

[0185] In some embodiments, the first rotation hole 31, the second rotation hole 32, the third rotation hole 35, and the fourth rotation hole 36 may all be formed in the fixing member 38. The fixing member 38 may be installed on the main outer shaft 37, and the fixing member 38 may be installed facing the inner surface of the main outer shaft 37.

[0186] Exemplarily, the fixing member 38 has an inner surface and an outer surface. The inner surface of the fixing member 38 faces the inner surface of the main outer shaft 37, the outer surface of the fixing member 38 is opposite to its inner surface, and the outer surface of the fixing member 38 may be a plane.

[0187] Exemplarily, the number of the fixing members 38 may be multiple. For example, the number of the fixing members 38 may be two. The two fixing members 38 are distributed along the length direction of the main shaft 3, and the two fixing members 38 may be arranged in a mirror image. The first rotation hole 31 and the second rotation hole 32 may be formed in one of the fixing members 38, and the third rotation hole 35 and the fourth rotation hole 36 may be formed in the other fixing member 38.

[0188] Exemplarily, the fixing member 38 may include a main board 381 and an annular portion 382. The main board 381 may be a thin plate member, and the main board 381 may be fixedly connected to the main outer shaft 37. The annular portion 382 and the main board 381 may be fixedly connected, and the annular portion 382 may protrude from one side of the main board 381 facing the inner surface of the main outer shaft 37. The annular portion 382 may be annular, and the first rotation hole 31, the second rotation hole 32, the third rotation hole 35 or the fourth rotation hole 36 may all be formed in the annular portion 382. Wherein, the number of the annular portions 382 on the same side of the main board 381 may be two, and a clamping space may be formed between the two annular portions 382. When the annular portion 382 is rotatably connected to other components, the two annular portions 382 may limit other components, which is beneficial to positioning, installing and preventing the detachment of other components. Wherein, the annular portion 382 may be located in the avoidance groove 371 of the main outer shaft 37, and the annular portion 382 may not contact the groove wall of the avoidance groove 371 of the main outer shaft 37.

[0189] Exemplarily, the fixing member 38 may be provided with a positioning groove 383. The positioning groove 383 may be located on the inner surface of the fixing member 38. The positioning groove 383 may be a rectangular groove, and the positioning groove 383 is used to cooperate with the protruding portion 3711 of the main outer shaft 37 to position the fixing member 38. The depth of the positioning groove 383 may be the same as the height of the protruding portion 3711 of the main outer shaft 37, and the width of the positioning groove 383 may be the same as the width of the protruding portion 3711 of the main outer shaft 37, so that the two are more adaptable and facilitate the installation and positioning of the fixing member 38.

[0190] Exemplarily, the fixing member 38 may be provided with a first mating half groove 384 and a second mating half groove 385. The first mating half groove 384 and the second mating half groove 385 are both located at the same end of the main board 381, and the first mating half groove 384 and the second mating half groove 385 may be formed on the inner surface of the main board 381. Wherein, both the first mating half groove 384 and the second mating half groove 385 may be U-shaped grooves. The first mating half groove 384 is butted against the first half groove 372 of the main outer shaft 37 to form a first transmission hole 33; the second mating half groove 385 is butted against the second half groove 373 of the main outer shaft 37 to form a second transmission hole 34.

[0191] Exemplarily, the fixing member 38 may be provided with a through hole. The through hole of the fixing member 38 penetrates from the inner surface of the fixing member 38 to the outer surface of the main board 381.

[0192] In some embodiments, the fastener 39 may be a screw, a bolt, etc., and the present embodiment does not strictly limit this. The number of the fasteners 39 may be the same as the number of the fixing holes 378 of the main outer shaft 37.

[0193] When assembling the main shaft 3, the fixing member 38 is buckled on the main outer shaft 37, the fastening member 39 penetrates through the through hole of the fixing member 38, and is threadedly connected to the fixing hole 378 of the main outer shaft 37, so as to press the fixing member 38 against the main outer shaft 37, realizing the fixed connection between the fixing member 38 and the main outer shaft 37, and forming the main shaft 3. In some other embodiments, the fixing member 38 and the main outer shaft 37 may also have other connection structures, and the embodiments of the present application do not strictly limit this.

[0194] Please refer to Figure 13 , Figure 13 is Figure 10 a schematic structural view of the first bracket 1 and the second bracket 5 in some embodiments as shown.

[0195] In some embodiments, the first bracket 1 may include the first mounting portion 11 and the first bending portion 12 as described above. Among them, both the first mounting portion 11 and the first bending portion 12 can be formed by plate-like members to better provide the supporting ability. The first mounting portion 11 and the first bending portion 12 can be fixedly connected. For example, the two can be an integral structural member. Among them, the first mounting portion 11 can also be provided with a plurality of mounting structures (not shown in the figure), and the mounting structures are used to connect the first housing (please refer to Figure 5 ).

[0196] Exemplarily, the first bracket 1 may further include a first connecting portion 112. The first connecting portion 112 is fixedly connected to the first mounting portion 11, and the first connecting portion 112 is disposed on the top side surface 111 facing away from the first mounting portion 11. Among them, the first bracket 1 can be provided with a first sliding groove 13. Among them, the first sliding groove 13 can be located at the bottom side of the first bracket 1. For example, it can be formed on the first connecting portion 112 or formed between the first connecting portion 112 and the first mounting portion 11. Among them, the first sliding groove 13 can extend along the width direction of the first bracket 1. The first sliding groove 13 can be a through groove, that is, it extends to the edge of the first bracket 1 to facilitate the installation of other components into the first sliding groove 13. The first sliding groove 13 can be an inverted "T" - shaped groove, so that after other components are installed in the first sliding groove 13, the side walls of the first sliding groove 13 can limit other components to prevent them from falling off, realizing a reliable sliding connection between the first sliding groove 13 and other components. Among them, the first sliding groove 13 can have two relatively arranged side walls. For example, the two relatively arranged side walls of the first sliding groove 13 are respectively the first side wall 131 and the second side wall 132.

[0197] Among them, the length direction of the first bracket 1 can be the same as the length direction of the folding mechanism 20 (please refer to Figure 9 ), the thickness direction of the first bracket 1 can be the same as the thickness direction (i.e., the Z - direction) of the folding mechanism 20, and the width direction of the first bracket 1 can be the same as the width direction (i.e., the X - direction) of the folding mechanism 20.

[0198] For example, the first sliding groove 13 has two relatively arranged side walls, namely a first side wall 131 and a second side wall 132.

[0199] In addition, the first bracket 1 can also be provided with a first relief groove 14. The first relief groove 14 communicates with the first sliding groove 13, and the first relief groove 14 is recessed relative to the first sliding groove 13 in the thickness direction of the first bracket 1 (i.e., parallel to the Z direction). Wherein, the width of the first relief groove 14 can be smaller than the width of the first sliding groove 13. By providing the first relief groove 14, the area of the bottom wall of the first sliding groove 13 is reduced, thereby reducing the friction area when the groove wall of the first sliding groove 13 is slidably connected to other components, and improving the slidability of the first sliding groove 13.

[0200] Exemplarily, the first bracket 1 can also be provided with a first connection groove 15. The first connection groove 15 can be located at the bottom side of the first bracket 1. For example, it can be formed on the first connection portion 112 or formed between the first connection portion 112 and the first mounting portion 11. The first connection groove 15 can extend along the width direction of the first bracket 1. The first connection groove 15 can be a through groove, that is, it extends to the edge of the first bracket 1 to facilitate the installation of other components into the first connection groove 15. The first connection groove 15 can be an inverted "T" - shaped groove, so that after other components are installed in the first connection groove 15, the groove walls of the first connection groove 15 can limit the other components to prevent them from falling off, realizing a reliable sliding connection between the first connection groove 15 and other components. Wherein, the first connection groove 15 can have a third side wall 151 and a fourth side wall 152 arranged relatively.

[0201] In addition, the first bracket 1 can also be provided with a second relief groove 16. The second relief groove 16 communicates with the first connection groove 15, and the second relief groove 16 is recessed relative to the first connection groove 15 in the thickness direction of the first bracket 1. Wherein, the width of the second relief groove 16 can be smaller than the width of the first connection groove 15. By providing the second relief groove 16, the area of the bottom wall of the first connection groove 15 is reduced, thereby reducing the friction area when the groove wall of the first connection groove 15 is slidably connected to other components, and improving the slidability of the first connection groove 15.

[0202] Exemplarily, a first avoidance area 122 can be provided on the first bending portion 12 of the first bracket 1. The first avoidance area 122 and the first connection groove 15 are arranged in the width direction of the first bracket 1 (i.e., parallel to the X direction). The first avoidance area 122 is used to avoid components slidably connected to the first connection groove 15 of the first bracket 1, so as to leave a movement space for these components, enabling the first bracket 1 to slide smoothly relative to these components.

[0203] Exemplarily, the first bracket 1 may further define a second track groove 17. The second track groove 17 is located at the bottom side of the first bracket 1, for example, it may be provided at the first connecting portion 112. The second track groove 17 is used for sliding connection with other components and limiting the other components. In some examples, the second track groove 17 may be an arc-shaped groove.

[0204] Exemplarily, the first bracket 1 may further define a third sliding groove 18. The third sliding groove 18 may be located at the bottom side of the first bracket 1. For example, it may be formed at the first connecting portion 112 or formed between the first connecting portion 112 and the first mounting portion 11. In some examples, the third sliding groove 18 and the first sliding groove 13 are symmetrically arranged in the length direction of the first bracket 1.

[0205] Exemplarily, the first bracket 1 may further define a fifth relief groove 19. The fifth relief groove 19 communicates with the third sliding groove 18, and the fifth relief groove 19 is recessed relative to the third sliding groove 18 in the thickness direction of the first bracket 1. In some examples, the fifth relief groove 19 and the first relief groove 14 are symmetrically arranged in the length direction of the first bracket 1.

[0206] Exemplarily, the first bracket 1 may further define a sixth track groove 110. The sixth track groove 110 is located at the bottom side of the first bracket 1, for example, it may be provided at the first connecting portion 112. In some examples, the sixth track groove 110 and the second track groove 17 are symmetrically arranged in the length direction of the first bracket 1.

[0207] In some embodiments, the first bracket 1 may be made of a metal material, so that the first bracket 1 has better rigidity and strength. In some other embodiments, the first bracket 1 may also be made of a plastic material, and the embodiments of the present application do not strictly limit this.

[0208] In some other embodiments, the first bracket 1 may not define the third sliding groove 18, the fifth relief groove 19, and the sixth track groove 110.

[0209] In some embodiments, the second bracket 5 may include the second mounting portion 51 and the second bending portion 52 as described above. The second mounting portion 51 and the second bending portion 52 may both be plate-like members to better provide a supporting ability. The second mounting portion 51 and the second bending portion 52 may be fixedly connected. For example, they may be integrally formed structural members; the second mounting portion 51 and the second bending portion 52 may be made of a metal material, so that the second bracket 5 has better rigidity and strength.

[0210] Exemplarily, the second bracket 5 may further include a second connecting portion 512. The second connecting portion 512 is fixedly connected to the second mounting portion 51, and the second connecting portion 512 is provided on the top side surface 511 facing away from the second mounting portion 51. The second bracket 5 may be provided with a second sliding groove 53; in addition, the second bracket 5 may further be provided with a third recess groove 54, and the third recess groove 54 may be correspondingly located at the second sliding groove 53.

[0211] Exemplarily, the second bracket 5 may further be provided with a second connecting groove 55, and the second connecting groove 55 may be located at the bottom side of the second bracket 5. The second bracket 5 may further be provided with a fourth recess groove 56, and the fourth recess groove 56 is correspondingly located at the second connecting groove 55.

[0212] Exemplarily, a second avoidance area 522 may be provided at the second bending portion 52 of the second bracket 5 facing the second connecting groove 55.

[0213] Exemplarily, the second bracket 5 may further be provided with a fourth track groove 57.

[0214] In some embodiments, the second bracket 5 may further be provided with a fourth sliding groove 58. The fourth sliding groove 58 and the second sliding groove 53 may be symmetrically structured in the length direction of the second bracket 5. The second bracket 5 may further be provided with a sixth recess groove 59, and the sixth recess groove 59 is located at the fourth sliding groove 58, and the sixth recess groove 59 sinks relative to the fourth sliding groove 58. The second bracket 5 may further be provided with an eighth track groove 510. In some other embodiments, the second bracket 5 may not be provided with the fourth sliding groove 58, the sixth recess groove 59, and the eighth track groove 510.

[0215] In some embodiments, the structure of the second bracket 5 may be in a symmetric relationship with the structure of the first bracket 1, and details thereof are not described herein again.

[0216] Please refer to Figure 14 , Figure 14 is Figure 10 the schematic structural diagram of the first rotating arm 21, the second rotating arm 41, the third rotating arm 25, and the fourth rotating arm 45 shown in the figure. Hereinafter, the first rotating arm 21 and the second rotating arm 41 are mainly used for exemplary illustration.

[0217] In some embodiments, the first rotating arm 21 may include a rotating end 211 and a sliding end 212, and the rotating end 211 and the sliding end 212 of the first rotating arm 21 are fixedly connected. Among them, the first rotating arm 21 may be an integral structural member to improve the strength of the first rotating arm 21; the first rotating arm 21 may be a rigid structure so that the first rotating arm 21 has a reliable driving ability.

[0218] Among them, the first rotating arm 21 may further include a connecting section 213, and the connecting section 213 of the first rotating arm 21 is connected between the rotating end 211 and the sliding end 212. At this time, the setting of the connecting section 213 makes the setting of the relative positions of the rotating end 211 and the sliding end 212 more flexible and reduces the design difficulty. Among them, the connecting section 213 and the sliding end 212 of the first rotating arm 21 may be arranged in a staggered manner, that is, the connecting section 213 and the sliding end 212 of the first rotating arm 21 are in a "Z" - shaped structure, which is conducive to the rational use of space and facilitates the thin - type design of the folding mechanism 20.

[0219] Among them, the rotating end 211 of the first rotating arm 21 may have a first shaft hole 2111. The first shaft hole 2111 may be a circular hole, and the first shaft hole 2111 penetrates through the rotating end 211 of the first rotating arm 21.

[0220] Among them, the sliding end 212 of the first rotating arm 21 may include a first protrusion 2121 and a first main body 2122. Among them, the first protrusion 2121 and the first main body 2122 are fixedly connected, the first protrusion 2121 may be located on both sides of the first main body 2122, and the first protrusion 2121 and the first main body 2122 may be integrally arranged.

[0221] Exemplarily, the height of the first protrusion 2121 of the first rotating arm 21 may be less than the height of the first main body 2122, and the first protrusion 2121 may protrude from the first main body 2122, so that the sliding end 212 as a whole is in a "convex" - shaped structure.

[0222] Among them, the first protrusion 2121 may include a first surface 2121a and a second surface 2121b, and the first surface 2121a and the second surface 2121b of the first protrusion 2121 are arranged in opposite directions; the first main body 2122 may include a third surface 2122a and a fourth surface 2122b, and the third surface 2122a and the fourth surface 2122b of the first main body 2122 are in opposite directions; the first surface 2121a of the first protrusion 2121 may be coplanar with the third surface 2122a of the first main body 2122, thereby forming a surface of the sliding end 212 of the first rotating arm 21.

[0223] Exemplarily, the sliding end 212 of the first rotating arm 21 may further include a first convex post 2123. The first convex post 2123 may be located on the first main body 2122, and the first convex post 2123 protrudes relative to the first main body 2122.

[0224] In addition, a first mounting hole 2124 may be formed in the sliding end 212 of the first rotating arm 21, and the first mounting hole 2124 may penetrate through the sliding end 212 of the first rotating arm 21. For example, the first mounting hole 2124 may penetrate through the first main body 2122 from the first convex post 2123.

[0225] In some embodiments, the second rotating arm 41 may include a rotating end 411, a sliding end 412, and a connecting section 413.

[0226] Wherein, the rotating end 411 of the second rotating arm 41 may have a second shaft hole 4111.

[0227] Wherein, the sliding end 412 of the second rotating arm 41 may include a second protrusion 4121 and a second main body 4122.

[0228] Exemplarily, the sliding end 412 of the second rotating arm 41 may further include a second stud 4123. Additionally, a second mounting hole 4124 may be formed in the sliding end 412 of the second rotating arm 41.

[0229] In some embodiments, the structure of the second rotating arm 41 may be symmetrical to the structure of the first rotating arm 21.

[0230] In some embodiments, the folding mechanism 20 may further include a third rotating arm 25 and a fourth rotating arm 45.

[0231] In some examples, the third rotating arm 25 may include a rotating end 251, a sliding end 252, and a connecting section 253.

[0232] Wherein, the rotating end 251 of the third rotating arm 25 may have a third shaft hole 2511.

[0233] Wherein, the sliding end 252 of the third rotating arm 25 may include a third protrusion 2521 and a third main body 2522.

[0234] Exemplarily, the sliding end 252 of the third rotating arm 25 may further include a third stud 2523. Additionally, a third mounting hole 2524 may be formed in the sliding end 252 of the third rotating arm 25. It can be understood that the design details of the above structure of the second rotating arm 41 can be designed with reference to the first rotating arm 21, and will not be elaborated here.

[0235] In some examples, the fourth rotating arm 45 may include a rotating end 451, a sliding end 452, and a connecting section 453.

[0236] Wherein, the rotating end 451 of the fourth rotating arm 45 may have a fourth shaft hole 4511.

[0237] Wherein, the sliding end 452 of the fourth rotating arm 45 may include a fourth protrusion 4521 and a fourth main body 4522.

[0238] Exemplarily, the sliding end 452 of the fourth rotating arm 45 may further include a fourth convex column 4523. Additionally, a fourth mounting hole 4524 may be formed in the sliding end 252 of the third rotating arm 25. It can be understood that the design details of the above structure of the fourth rotating arm 45 can be designed with reference to the first rotating arm 21, and will not be elaborated here.

[0239] In some embodiments, the structure of the third rotating arm 25 may be a symmetric structure with the structure of the first rotating arm 21; the structure of the fourth rotating arm 45 may be a symmetric structure with the structure of the second rotating arm 41, which will not be elaborated in this embodiment.

[0240] Please refer to Figures 13 to 16 , Figure 15 which Figure 9 is a schematic structural diagram of a part of the folding mechanism 20 shown in Figure 16 and Figure 15 is a cross-sectional view of the folding mechanism 20 shown in

[0241] along the section A-A.

[0242] Exemplarily, the rotating end 211 of the first rotating arm 21 may be rotatably connected to the main shaft 3, and the sliding end 212 of the first rotating arm 21 is slidably connected to the first bracket 1.

[0243] For example, the rotating end 211 of the first rotating arm 21 is rotatably connected to the first rotating hole 31 through the first rotating shaft 61. The first rotating shaft 61 may be disposed in the first shaft hole 2111 and the first rotating hole 31, and the axes of the first rotating shaft 61, the first shaft hole 2111, and the first rotating hole 31 may be collinear. The first shaft hole 2111, the first rotating shaft 61, and the first rotating hole 31 form a rotating structure. The diameters of the first rotating shaft 61, the first shaft hole 2111, and the first rotating hole 31 may be the same to facilitate the manufacturing and installation of the folding mechanism 20. At this time, the first rotating shaft 61 is located inside the main shaft 3, and the rotation axis of the first rotating arm 21 relative to the main shaft 3 is located inside the main shaft 3; during the rotation of the first rotating arm 21 relative to the main shaft 3, the first rotating hole 31 is stressed by its cylindrical hole wall, and the first shaft hole 2111 is stressed by its cylindrical hole wall, so that the forces on the first rotating arm 21 and the main shaft 3 are relatively balanced, and it is not easy to form a virtual position. The rotation accuracy of the rotating structure is relatively high, so that the rotation accuracy of the folding mechanism 20 is relatively high.

[0244] During installation, the first shaft hole 2111 can be aligned with the first rotation hole 31 on the main shaft 3, and then the first rotating shaft 61 is inserted into the first shaft hole 2111 and the first rotation hole 31, thereby forming a rotating structure, which is more convenient for the installation of the first rotating arm 21.

[0245] In some other embodiments, the first rotating shaft 61 can also be integrally provided with the first rotating arm 21, that is, the first rotating arm 21 can have a rotating shaft, and this embodiment does not make strict limitations on this.

[0246] In this embodiment, since the rotation axis of the first rotating arm 21 passes through the first rotation hole 31, that is, the rotating end 211 of the first rotating arm 21 and the main shaft 3 are rotationally connected by a solid shaft, the connection between the first rotating arm 21 and the main shaft 3 is more reliable and not easily detached; and the structure of the main shaft 3 is compact, the overall volume of the main shaft 3 is small, which is beneficial to the thin design of the main shaft 3 and the folding mechanism 20.

[0247] Exemplarily, the sliding end 212 of the first rotating arm 21 can be slidably connected to the first sliding groove 13 of the first bracket 1, so that the first rotating arm 21 can slide relative to the first bracket 1. Among them, the sliding end 212 of the first rotating arm 21 can form a surface contact with the groove wall of the first sliding groove 13 of the first bracket 1 to achieve the sliding connection between the sliding end 212 of the first rotating arm 21 and the first bracket 1. Among them, the sliding end 212 of the first rotating arm 21 can slide relative to the first bracket 1 along the width direction of the first bracket 1, the width direction of the first bracket 1 is perpendicular to its length direction, and the length direction of the first bracket 1 can be the same as the length direction of the folding mechanism 20 (i.e., the Y direction).

[0248] For example, the first surface 2121a of the first protrusion 2121 of the first rotating arm 21 and the first side wall 131 of the first sliding groove 13 of the first bracket 1 can form a sliding structure, and the second surface 2121b of the first protrusion 2121 and the second side wall 132 of the first sliding groove 13 can form a sliding structure. Through the surface contact between the first protrusion 2121 and the groove wall of the first sliding groove 13, the sliding connection between the first protrusion 2121 and the first sliding groove 13 is more reliable and has less play, and further the sliding connection between the first rotating arm 21 and the first bracket 1 is more reliable and has better mechanical properties.

[0249] In this embodiment, the rotating end 211 of the first rotating arm 21 is rotationally connected to the main shaft 3, enabling the rotating end 211 of the first rotating arm 21 to rotate relative to the main shaft 3, so that the entire first rotating arm 21 can rotate relative to the main shaft 3. By slidingly connecting the sliding end 212 of the first rotating arm 21 to the first bracket 1, the sliding end 212 of the first rotating arm 21 slides relative to the first bracket 1, so that the entire first rotating arm 21 can approach or move away from the first bracket 1. Therefore, relatively, the first bracket 1 can rotate relative to the main shaft 3 around the first rotating arm 21 and slide relative to the first rotating arm 21 to approach or move away from the main shaft 3, enabling the first bracket 1 to expand or fold relative to the main shaft 3.

[0250] In some embodiments, the rotating end 411 of the second rotating arm 41 can be rotationally connected to the main shaft 3, and the sliding end 412 of the second rotating arm 41 is slidingly connected to the second bracket 5.

[0251] Exemplarily, the rotating end 411 of the second rotating arm 41 is rotationally connected to the second rotating hole 32, and the rotation axis of the second rotating arm 41 passes through the second rotating hole 32. The rotation axis of the second rotating arm 41 is the axis around which the second rotating arm 41 rotates relative to the main shaft 3. The axis of the second shaft hole 4111 can coincide with the rotation axis of the second rotating arm 41. At this time, the second shaft hole 4111 and the second rotating hole 32 are coaxial. The rotation axis of the second rotating arm 41 can be parallel to the length direction of the main shaft 3.

[0252] For example, the rotating end 411 of the second rotating arm 41 is rotationally connected to the second rotating hole 32 through the second rotating shaft 62. The second rotating shaft 62 is inserted into the second shaft hole 4111 and the second rotating hole 32. The axes of the second rotating shaft 62, the second shaft hole 4111, and the second rotating hole 32 can be collinear, and the second shaft hole 4111, the second rotating shaft 62, and the second rotating hole 32 form a rotating structure. At this time, the second rotating shaft 62 is located inside the main shaft 3, and the rotation axis of the second rotating arm 41 relative to the main shaft 3 is located inside the main shaft 3; during the rotation of the second rotating arm 41 relative to the main shaft 3, the second rotating hole 32 is stressed by its cylindrical hole wall, and the second shaft hole 4111 is stressed by its cylindrical hole wall, making the forces on the second rotating arm 41 and the main shaft 3 relatively balanced and not easily forming a virtual position. The rotation accuracy of the rotating structure is relatively high, so that the rotation accuracy of the folding mechanism 20 is relatively high.

[0253] During installation, the second shaft hole 4111 can be aligned with the second rotating hole 32 of the main shaft 3, and then the second rotating shaft 62 is inserted into the second shaft hole 4111 and the second rotating hole 32 to form a rotating structure, which is relatively convenient for the installation of the second rotating arm 41.

[0254] In some other embodiments, the second rotating shaft 62 may also be integrally provided with the second rotating arm 41, that is, the second rotating arm 41 may have a rotating shaft, and this embodiment does not strictly limit this.

[0255] In this embodiment, since the rotation axis of the second rotating arm 41 passes through the second rotating hole 32, that is, the rotating end 411 of the second rotating arm 41 and the main shaft 3 are rotationally connected by a solid shaft, the connection between the second rotating arm 41 and the main shaft 3 is more reliable and not easily detached; and the structure of the main shaft 3 is compact, the overall volume of the main shaft 3 is small, which is beneficial to the thin design of the main shaft 3 and the folding mechanism 20.

[0256] Exemplarily, the sliding end 412 of the second rotating arm 41 may be slidably connected to the second sliding groove 53 of the second bracket 5, so that the second rotating arm 41 can slide relative to the second bracket 5. Among them, the sliding end 412 of the second rotating arm 41 may form a surface contact with the second bracket 5 to achieve the sliding connection between the sliding end 412 of the second rotating arm 41 and the second bracket 5. Among them, the sliding end 412 of the second rotating arm 41 may slide relative to the second bracket 5 along the width direction of the second bracket 5. Among them, the length direction of the second bracket 5 may be the same as the length direction of the folding mechanism 20 (i.e., the Y direction), the thickness direction of the second bracket 5 may be perpendicular to the flexible display screen 200 (i.e., the Z direction), and the width direction of the second bracket 5 is perpendicular to its length direction and thickness direction (i.e., parallel to the X direction).

[0257] For example, a surface contact may be formed between the second protrusion 4121 and the groove wall of the second sliding groove 53, which will not be elaborated here, so that the sliding connection between the second protrusion 4121 and the second sliding groove 53 is more reliable and has less play, and further the sliding connection between the second rotating arm 41 and the first bracket 1 is more reliable and has better mechanical properties.

[0258] In this embodiment, by rotationally connecting the rotating end 411 of the second rotating arm 41 with the main shaft 3, the rotating end 411 of the second rotating arm 41 can rotate relative to the main shaft 3, so that the second rotating arm 41 as a whole can rotate relative to the main shaft 3. By slidably connecting the sliding end 412 of the second rotating arm 41 with the second bracket 5, the sliding end 412 of the second rotating arm 41 slides relative to the second bracket 5, so that the second rotating arm 41 as a whole can approach or move away from the second bracket 5. Therefore, relatively, the second bracket 5 can rotate relative to the main shaft 3 around the main shaft 3 through the second rotating arm 41, and slide relative to the second rotating arm 41 to approach or move away from the main shaft 3, so that the second bracket 5 can be unfolded or folded relative to the main shaft 3.

[0259] In some embodiments, the first bracket 1 may further have a third sliding groove 18, the second bracket 5 may further have a fourth sliding groove 58, and the folding mechanism 20 may further include a third rotating arm 25 and a fourth rotating arm 45. At this time, the third rotating arm 25 is rotatably connected to the main shaft 3 and slidably connected to the first bracket 1, and the fourth rotating arm 45 is rotatably connected to the main shaft 3 and slidably connected to the second bracket 5.

[0260] In this embodiment, the main shaft 3 is connected to the first bracket 1 through the first rotating arm 21 and the third rotating arm 25 at the same time, which can make the relative movement between the first bracket 1 and the main shaft 3 more stable. Similarly, the main shaft 3 is connected to the second bracket 5 through the second rotating arm 41 and the fourth rotating arm 45 at the same time, which can make the relative movement between the second bracket 5 and the main shaft 3 more stable.

[0261] Among them, the connection structure between the third rotating arm 25 and the main shaft 3 and the connection structure with the first bracket 1 can refer to the relevant solution of the first rotating arm 21, which will not be elaborated here. Similarly, the connection structure between the fourth rotating arm 45 and the main shaft 3 and the connection structure with the first bracket 1 can refer to the relevant solution of the second rotating arm 41, which will not be elaborated here.

[0262] Please refer to Figure 17 , Figure 17 is Figure 10 the schematic structural diagram of the first connecting arm 22 and the second connecting arm 42 shown in the figure.

[0263] In some embodiments, the first connecting arm 22 may include a first end 221, a second end 222, and a connecting arm body 223. The first end 221, the second end 222, and the connecting arm body 223 of the first connecting arm 22 are fixedly connected in sequence, and the first connecting arm 22 may be an integrated structural member to improve the strength of the first connecting arm 22.

[0264] Exemplarily, the first end 221 of the first connecting arm 22 may include a first rotating shaft 2211. The first rotating shaft 2211 may be a cylindrical structure.

[0265] Exemplarily, the second end 222 of the first connecting arm 22 may have a first docking hole 2221, and the first docking hole 2221 penetrates the second end 222 of the first connecting arm 22. The outer side surface of the second end 222 of the first connecting arm 22 may be an arc surface, and the hole wall of the first docking hole 2221 may be a cylindrical surface, which is easy to manufacture.

[0266] In some embodiments, the first end 221 of the first connecting arm 22 may further include a first tooth portion 2212. The first tooth portion 2212 may be coaxially arranged with the first rotating shaft 2211, so that the first tooth portion 2212 rotates coaxially with the first rotating shaft 2211 and the rotation accuracy is improved. The first tooth portion 2212 may be an incomplete gear, and the first tooth portion 2212 may be integrally provided with the first rotating shaft 2211 to facilitate the manufacture of the first connecting arm 22.

[0267] In some other embodiments, the first connecting arm 22 may not be provided with the connecting arm body 223, but its first end 221 may be directly connected to its second end 222. The embodiments of the present application do not strictly limit the specific implementation structure of the first connecting arm 22.

[0268] In some embodiments, the second connecting arm 42 may include a first end 421, a second end 422, and a connecting arm body 423. The first end 421, the second end 422, and the connecting arm body 423 of the second connecting arm 42 are fixedly connected, and the second connecting arm 42 may be an integrated structural member to enhance the strength of the second connecting arm 42.

[0269] Exemplarily, the first end 421 of the second connecting arm 42 may include a second rotating shaft 4211.

[0270] Exemplarily, the second end 422 of the second connecting arm 42 may have a second docking hole 4221.

[0271] In some embodiments, the first end 421 of the second connecting arm 42 may further include a second tooth portion 4212. The second tooth portion 4212 may be coaxially arranged with the second rotating shaft 4211, so that the second tooth portion 4212 rotates coaxially with the second rotating shaft 4211 and the rotation accuracy is improved. The second tooth portion 4212 may be an incomplete gear, and the second tooth portion 4212 may be integrally provided with the second rotating shaft 4211 to facilitate the manufacture of the second connecting arm 42.

[0272] In some embodiments, the structure of the second connecting arm 42 may be symmetrical to the structure of the first connecting arm 22, and this embodiment will not be elaborated herein.

[0273] In some other embodiments, the first connecting arm 22 may not be provided with the connecting arm body 223, but its first end 221 may be directly connected to its second end 222. The embodiments of the present application do not strictly limit the specific implementation structure of the first connecting arm 22.

[0274] Please refer to Figure 18 , Figure 18 which Figure 10 is a schematic structural diagram of the first sliding arm 23 and the second sliding arm 43 shown.

[0275] In some embodiments, the first sliding arm 23 may include a first end 231 and a second end 232. The first end 231 and the second end 232 of the first sliding arm 23 are fixedly connected, and the first end 231 and the second end 232 may be an integrated structural member to improve the strength of the first sliding arm 23.

[0276] Exemplarily, the first end 231 of the first sliding arm 23 may be located on the side of its second end 232. Among them, an installation space may be provided in the middle of the first end 231 of the first sliding arm 23 to reserve space for rotational connection with other components.

[0277] Among them, a first connection hole 2311 may be formed in the first end 231 of the first sliding arm 23. The first connection hole 2311 may be a through hole, and the first connection hole 2311 may be a cylindrical hole.

[0278] Exemplarily, the second end 232 of the first sliding arm 23 may include a first sliding body 2321 and a first sliding portion 2322. Among them, the first sliding portion 2322 and the first sliding body 2321 are fixedly arranged, and the first sliding portion 2322 may be located on both sides of the first sliding body 2321.

[0279] Among them, the height of the first sliding portion 2322 may be less than the height of the first sliding body 2321, and the first sliding portion 2322 may protrude from the first sliding body 2321, so that the second end 232 of the first sliding arm 23 has a "convex" - shaped structure.

[0280] For example, the first sliding body 2321 may have a first side surface 2321a and a second side surface 2322b arranged opposite to each other, the first sliding portion 2322 may have a third side surface 2322a and a fourth side surface 2322b arranged opposite to each other, and the first side surface 2321a of the first sliding body 2321 may be coplanar with the third side surface 2322a of the first sliding portion 2322. The first sliding portion 2322 is used for snap - connection and sliding connection with other components, and the first sliding portion 2322 may slide relative to other components through its third side surface 2322a and fourth side surface 2322b.

[0281] Exemplarily, the first sliding body 2321 may be provided with a first track groove 2323. Among them, the first track groove 2323 is used for sliding connection with other components and limiting other components. The first track groove 2323 may be an arc - shaped groove. The first track groove 2323 may be a through - groove, which is easy to manufacture.

[0282] Exemplarily, the first sliding body 2321 may further be provided with a fifth track groove 2324. At this time, when the first track groove 2323 and the fifth track groove 2324 of the first sliding body 2321 are respectively movably connected to other components, the force on the first sliding body 2321 is more balanced, thereby making the force on the first sliding body 2321 more balanced and preventing the first sliding arm 23 from deflecting.

[0283] Exemplarily, the fifth track groove 2324 and the first track groove 2323 may be symmetrically arranged.

[0284] In some embodiments, the second sliding arm 43 may include a first end 431 and a second end 432. The first end 431 and the second end 432 of the second sliding arm 43 are fixedly connected, and the first end 431 and the second end 432 of the second sliding arm 43 may be an integrated structural member to improve the strength of the second sliding arm 43.

[0285] Exemplarily, the first end 431 of the second sliding arm 43 may be provided with a second connection hole 4311.

[0286] Exemplarily, the second end 432 of the second sliding arm 43 may include a second sliding body 4321 and a second sliding portion 4322. The second sliding portion 4322 is used for snap-connection and sliding connection with other components.

[0287] Exemplarily, the second sliding body 4321 may be provided with a third track groove 4323.

[0288] Exemplarily, the second sliding body 4321 may be provided with a seventh track groove 4324. At this time, when the third track groove 4323 and the seventh track groove 4324 of the second sliding body 4321 are respectively movably connected to other components, the force on the second sliding body 4321 is more balanced, thereby making the force on the second sliding body 4321 more balanced and preventing the second sliding arm 43 from deflecting.

[0289] Exemplarily, the seventh track groove 4324 and the third track groove 4323 may be symmetrically arranged.

[0290] It can be understood that the design details of the above structure of the second sliding arm 43 may refer to the design of the first sliding arm 23 and will not be elaborated here.

[0291] In some embodiments, the structure of the second sliding arm 43 may be symmetrical to the structure of the first sliding arm 23, and this embodiment will not be elaborated.

[0292] Please refer to Figures 17 to 19 , Figure 19 which Figure 9 is a schematic structural diagram of a partial structure of the folding mechanism 20 shown.

[0293] In some embodiments, the first tooth portion 2212 of the first end 221 of the first connecting arm 22 meshes with the second tooth portion 4212 of the first end 421 of the second connecting arm 42. At this time, by setting the first tooth portion 2212 to mesh with the second tooth portion 4212, the first connecting arm 22 and the second connecting arm 42 can rotate synchronously, and further the first connecting mechanism 2 (refer to Figure 9 ) and the second connecting mechanism 4 (refer to Figure 9 ) can move synchronously.

[0294] In addition, the first connecting arm 22 and the second connecting arm 42 can also be connected by a connecting member 8. Exemplarily, the connecting member 8 sleeves the first rotating shaft 2211 of the first connecting arm 22 and the second rotating shaft 4211 of the second connecting arm 42.

[0295] Wherein, the connecting member 8 can be provided with two through holes 81, and the two through holes 81 can be coaxially sleeved with the first rotating shaft 2211 of the first connecting arm 22 and the second rotating shaft 4211 of the second connecting arm 42 respectively. Wherein, the diameters of the through holes 81 can be adapted to the first rotating shaft 2211 and the second rotating shaft 4211 respectively, so that the connecting member 8 is rotationally connected with the first rotating shaft 2211 and the second rotating shaft 4211.

[0296] In this embodiment, by setting the connecting member 8, the first tooth portion 2212 of the first connecting arm 22 and the second tooth portion 4212 of the second connecting arm 42 are kept in a stable meshing relationship, and the meshing between the two is more reliable, so that the first connecting arm 22 and the second connecting arm 42 can rotate synchronously relative to the connecting member 8, and the synchronous rotation performance is better.

[0297] In some embodiments, the second end 222 of the first connecting arm 22 is rotatably connected to the first end 231 of the first sliding arm 23.

[0298] Exemplarily, the first connecting arm 22 and the first sliding arm 23 can be rotatably connected by a first connecting shaft 71. At this time, the first connecting arm 22 and the first sliding arm 23 can rotate relative to each other about the first axis 711 of the first connecting shaft 71, and the axis about which the second end 222 of the first connecting arm 22 and the first end 231 of the first sliding arm 23 rotate relative to each other is the first axis 711. Among them, the first connecting shaft 71 passes through the first docking hole 2221 of the first connecting arm 22 and the first connecting hole 2311 of the first sliding arm 23, so that the first connecting arm 22 and the first sliding arm 23 are rotatably connected. In some examples, the diameters of the first docking hole 2221 of the first connecting arm 22, the first connecting hole 2311 of the first sliding arm 23, and the first connecting shaft 71 can be the same for easy connection. At this time, the first connecting shaft 71 is a solid shaft, and the first connecting arm 22 and the first sliding arm 23 are connected by a solid shaft. When the first sliding arm 23 rotates relative to the first connecting arm 22, the force on the first connecting shaft 71 is relatively uniform, the rotational connection between the first sliding arm 23 and the first connecting arm 22 is relatively reliable, and the structure between the components is compact, with a small overall volume, which is beneficial to the thin design of the main shaft 3 (please refer to Figure 9 ) and the folding mechanism 20 (please refer to Figure 9 ).

[0299] During installation, the second end 222 of the first connecting arm 22 can be installed in the installation space of the first sliding arm 23. The first connecting hole 2311 of the first sliding arm 23 and the first docking hole 2221 of the first connecting arm 22 are aligned, and then the first connecting shaft 71 is inserted into the first connecting hole 2311 of the first sliding arm 23 from the side, so that the first sliding arm 23 is rotatably connected to the first connecting arm 22, which is more convenient for the installation of the first sliding arm 23.

[0300] In some embodiments, the second end 422 of the second connecting arm 42 is rotatably connected to the first end 431 of the second sliding arm 43.

[0301] Exemplarily, the second connecting arm 42 and the second sliding arm 43 can be rotatably connected through a second connecting shaft 72. At this time, the second connecting arm 42 and the second sliding arm 43 can rotate relative to each other about the second axis 721; the axis about which the second end 422 of the second connecting arm 42 and the first end 431 of the second sliding arm 43 rotate relative to each other is the second axis 721. Among them, the second connecting shaft 72 passes through the second docking hole 4221 of the second connecting arm 42 and the second connecting hole 4311 of the second sliding arm 43, so that the second connecting arm 42 and the second sliding arm 43 are rotatably connected. At this time, the diameters of the second docking hole 4221 of the second connecting arm 42, the second connecting hole 4311 of the second sliding arm 43, and the second connecting shaft 72 can be the same for easy connection. In some examples, the second connecting shaft 72 is a solid shaft. When the second connecting arm 42 and the second sliding arm 43 are connected by the solid shaft and the second sliding arm 43 rotates relative to the second connecting arm 42, the force on the second connecting shaft 72 is relatively uniform, and the rotational connection between the second sliding arm 43 and the second connecting arm 42 is relatively reliable. Moreover, the structure between the components is compact, and the overall volume is small, which is beneficial to the thin design of the main shaft 3 (please refer to Figure 9 ) and the folding mechanism 20 (please refer to Figure 9 ).

[0302] During installation, the second end 422 of the second connecting arm 42 can be installed in the installation space of the second sliding arm 43. The second connecting hole 4311 of the second sliding arm 43 is aligned with the second docking hole 4221 of the second connecting arm 42, and then the second connecting shaft 72 is inserted into the second sliding arm 43 from the side of the second connecting hole 4311, so that the second sliding arm 43 is rotatably connected to the second connecting arm 42, which is more convenient for the installation of the second sliding arm 43.

[0303] Please refer to Figure 11 、 Figures 19 to 21 , Figure 20 is Figure 9 a schematic structural diagram of a partial structure of the folding mechanism 20 shown in the unfolded state, Figure 21 is Figure 20 a cross-sectional view of a partial structure of the folding mechanism 20 shown in the cross-section along B-B.

[0304] In some embodiments, the first connecting arm 22 is rotatably connected to the main shaft 3, and the second end 232 of the first sliding arm 23 is slidably connected to the first bracket 1.

[0305] Exemplarily, the first end 221 of the first connecting arm 22 is rotatably connected to the main shaft 3, and the second end 222 of the first connecting arm 22 is rotatably connected to the first end 231 of the first sliding arm 23. At this time, the first connecting arm 22 can rotate relative to the main shaft 3 and can also rotate relative to the first sliding arm 23. The first connecting arm 22 and the first sliding arm 23 form a two-stage link structure.

[0306] For example, the first connecting arm 22 is rotatably connected to the first transmission hole 33 through the first rotating shaft 2211 (please refer to Figure 11 ), so that the first connecting arm 22 is rotatably connected to the main shaft 3. The first connecting arm 22 and the main shaft 3 rotate relative to each other around the axis of the first rotating shaft 2211, and the rotation axis of the relative rotation of the first connecting arm 22 and the main shaft 3 is located within the main shaft 3. At this time, the first connecting arm 22 and the main shaft 3 are rotatably connected in a solid axis, and the connection structure is more reliable; and the structure of the main shaft 3 is compact, the overall volume of the main shaft 3 is small, which is beneficial to the thin design of the main shaft 3 and the folding mechanism 20.

[0307] Among them, when the first connecting arm 22 has a first tooth portion 2212, the first tooth portion 2212 can be located in the first movable space 374 of the main shaft 3, and the first tooth portion 2212 rotates in the first movable space 374 and the space above it.

[0308] Exemplarily, the first sliding portion 2322 of the first sliding arm 23 can be slidably connected to the first connecting groove 15 of the first bracket 1.

[0309] Among them, the first sliding portion 2322 can be in surface contact with the first connecting groove 15. Among them, the first sliding portion 2322 can be located in the space between the two side walls of the first connecting groove 15. For example, the third side surface 2322a of the first sliding portion 2322 and the third side wall 151 of the first connecting groove 15 can form a sliding structure, and the fourth side surface 2322b of the first sliding portion 2322 and the fourth side wall 152 of the first connecting groove 15 can form a sliding structure; the sliding structure between the first sliding portion 2322 and the groove wall of the first connecting groove 15 is surface sliding. Therefore, the sliding between the first sliding arm 23 and the first bracket 1 can be more reliable, the virtual position between the two is small, and the sliding accuracy is high.

[0310] In this embodiment, when the folding mechanism 20 is in the open state, the first axis 711 of the relative rotation of the first connecting arm 22 and the first sliding arm 23 can be located between the main shaft 3 and the first bracket 1. At this time, the first avoidance space 376 of the main shaft 3 can avoid the first connecting arm 22 to prevent the first connecting arm 22 from interfering with the main outer shaft 37. Since the first connecting arm 22 and the first sliding arm 23 are rotatably connected and the first axis 711 is located between the main shaft 3 and the first bracket 1, it is beneficial to flexibly set the positions of the first connecting arm 22 and the first sliding arm 23 in the folding mechanism 20, thereby facilitating reducing the opening size of the first avoidance space 376, thereby reducing the structural damage to the main shaft 3. For example, there is no need to set a notch structure corresponding to the first sliding arm 23 or the notch structure size is small at the side edge of the main shaft 3 in its width direction, so that the main shaft 3 can maintain the integrity of the structure as much as possible and improve the supporting performance of the main shaft 3; it is also beneficial to reduce the first avoidance area 122 (see Figure 13)'s opening size, thereby reducing the structural damage to the first bracket 1 and improving the support performance of the first bracket 1.

[0311] In some embodiments, the second connecting arm 42 is rotatably connected to the main shaft 3, and the second end 432 of the second sliding arm 43 is slidably connected to the second bracket 5.

[0312] Exemplarily, the first end 421 of the second connecting arm 42 is rotatably connected to the main shaft 3, and the second end 422 of the second connecting arm 42 is rotatably connected to the first end 431 of the second sliding arm 43. At this time, the second connecting arm 42 can rotate relative to the main shaft 3 and can also rotate relative to the second sliding arm 43. The second connecting arm 42 and the second sliding arm 43 form a two-stage link structure.

[0313] For example, the second connecting arm 42 is rotatably connected to the second transmission hole 34 through the second rotating shaft 4211, so that the second connecting arm 42 is rotatably connected to the main shaft 3. The second connecting arm 42 and the main shaft 3 rotate relative to each other around the axis of the second rotating shaft 4211, and the rotation axis of the relative rotation of the second connecting arm 42 and the main shaft 3 is located within the main shaft 3. At this time, the second connecting arm 42 and the main shaft 3 are rotatably connected in a solid axis, and the connection structure is more reliable; and the structure of the main shaft 3 is compact, the overall volume of the main shaft 3 is small, which is beneficial to the thin design of the main shaft 3 and the folding mechanism 20.

[0314] Wherein, when the second connecting arm 42 has a second tooth portion 4212, the second tooth portion 4212 can be located in the second moving space 375 of the main shaft 3, and the second tooth portion 4212 rotates in the second moving space 375 and the space above it.

[0315] Exemplarily, the second sliding portion 4322 of the second sliding arm 43 can be slidably connected to the second connecting groove 55 of the second bracket 5.

[0316] Wherein, the second sliding portion 4322 can be in surface contact with the second connecting groove 55. Wherein, the second sliding portion 4322 can be located in the space between the two side walls of the second connecting groove 55, and a sliding structure can be formed between the side surface of the second sliding portion 4322 and the side wall of the second connecting groove 55, which will not be elaborated here; the sliding structure between the second sliding portion 4322 and the second connecting groove 55 is surface sliding. Therefore, the sliding between the second sliding arm 43 and the second bracket 5 can be more reliable, the virtual position between the two is small, and the sliding accuracy is high.

[0317] In this embodiment, when the folding mechanism 20 is in the open state, the second axis 721 about which the second connecting arm 42 and the second sliding arm 43 rotate relative to each other can be located between the main shaft 3 and the second bracket 5. At this time, the second avoidance space 377 of the main shaft 3 can provide avoidance for the second connecting arm 42 to prevent the second connecting arm 42 from interfering with the main outer shaft 37. Since the second connecting arm 42 and the second sliding arm 43 are rotatably connected and the second axis 721 is located between the main shaft 3 and the second bracket 5, it is beneficial to flexibly arrange the positions of the second connecting arm 42 and the second sliding arm 43 in the folding mechanism 20, thereby facilitating reducing the excavation size of the second avoidance space 377, and thus reducing the structural damage to the main shaft 3. For example, the side edge of the main shaft 3 in its width direction does not need to be provided with a notch structure corresponding to the second sliding arm 43 or the size of the notch structure is small, so that the main shaft 3 can maintain the integrity of the structure as much as possible and improve the supporting performance of the main shaft 3; it is also beneficial to reduce the opening size of the second avoidance area 522 (see Figure 13 ), thereby reducing the structural damage to the second bracket 5 and improving the supporting performance of the second bracket 5.

[0318] In some embodiments, the connecting member 8 can connect the first end 221 of the first connecting arm 22 and the first end 421 of the second connecting arm 42, and the connecting member 8 is installed on the main shaft 3.

[0319] Among them, the connecting member 8 can be fixedly installed on the main shaft 3. For example, the connecting member 8 can be connected to the main shaft 3 by means of colloid bonding, or can be connected to the main shaft 3 by means of snap connection. Alternatively, the connecting member 8 can also be movably installed on the main shaft 3. For example, the connecting member 8 can be movably installed in the slot of the main shaft 3 and allows the connecting member 8 to move slightly. The installation method of the connecting member 8 in this embodiment is not strictly limited.

[0320] In some embodiments, since the first end 221 of the first connecting arm 22 and the first end 421 of the second connecting arm 42 are both rotatably connected to the main shaft 3, and the first tooth portion 2212 of the first connecting arm 22 can be meshed and connected with the second tooth portion 4212 of the second connecting arm 42, they can rotate synchronously relative to the main shaft 3. The first bracket 1 and the main shaft 3 are linked through the first rotating arm 21, the first connecting arm 22 and the first sliding arm 23, and the second bracket 5 and the main shaft 3 are linked through the second rotating arm 41, the second connecting arm 42 and the second sliding arm 43; both the first bracket 1 and the second bracket 5 can rotate relative to the main shaft 3, and since the first connecting arm 22 and the second connecting arm 42 are synchronous relative to the main shaft 3, the first bracket 1 and the second bracket 5 can also rotate synchronously relative to the main shaft 3. At this time, the first connecting arm 22, the second connecting arm 42, the first sliding arm 23 and the second sliding arm 43 not only play a role in connecting the main shaft 3 with the first bracket 1 and the second bracket 5, but also have a synchronous function, so that there is no need to additionally provide a synchronous component, simplifying the structure of the folding mechanism 20 and improving the integration degree of the folding mechanism 20.

[0321] In some other embodiments, the first connecting arm 23 may not be provided with the first tooth portion 2212, the second connecting arm 43 may not be provided with the second tooth portion 4212, and the synchronization may not be achieved by the meshing of the first tooth portion 2212 and the second tooth portion 4212. Instead, the folding mechanism 20 may be additionally provided with a synchronization component to achieve the synchronous movement of the first bracket 1 and the second bracket 5 relative to the main shaft 3. This embodiment is not strictly limited thereto.

[0322] Please refer to Figures 22 to 24 , Figure 22 which is Figure 9 a schematic structural diagram of a partial structure of the folding mechanism 20 shown in Figure 23 and Figure 22 a schematic exploded view of a partial structure of the folding mechanism 20 shown in Figure 24 and Figure 22 a cross-sectional view taken along the C-C of a partial structure of the folding mechanism 20 shown in

[0323] In some embodiments, the first swing arm 24 may include a first end 241, a swing portion 242, and a second end 243 that are connected in sequence. Among them, the first swing arm 24 may include a plate body, and the first end 241, the swing portion 242, and the second end 243 all include a part of the plate body.

[0324] Exemplarily, the first end 241 of the first swing arm 24 may include a first pin shaft 2411. The first pin shaft 2411 of the first swing arm 24 may be a cylindrical shaft. The first pin shaft 2411 may be fixed to one side of the plate body and protrude relative to the plate body.

[0325] The second end 243 of the first swing arm 24 may include a second pin shaft 2431. The second pin shaft 2431 of the first swing arm 24 may be a cylindrical shaft. The second pin shaft 2431 may be fixed to one side of the plate body and protrude relative to the plate body. The second pin shaft 2431 and the first pin shaft 2411 are located on the same side of the plate body.

[0326] The swing portion 242 of the first swing arm 24 may be provided with a first swing hole 2421. Among them, the first swing hole 2421 of the first swing arm 24 may be a stepped hole. Among them, the swing portion 242 of the first swing arm 24 may include a sliding block 2422. The sliding block 2422 may be exposed in the first swing hole 2421. The sliding block 2422 may sink relative to one side plate surface of the swing portion 242 of the first swing arm 24, and one side surface of the sliding block 2422 may form a stepped surface of the first swing hole 2421. Among them, the axes of both the first pin shaft 2411 and the second pin shaft 2431, and the hole axis of the first swing hole 2421 may be parallel to each other.

[0327] In some embodiments, the first connecting mechanism 2 of the folding mechanism 20 may further include a first limiting member 28a and a first fastening member 29a. Among them, the first limiting member 28a may be an annular member. The first limiting member 28a may be installed in the first swinging hole 2421 of the first swing arm 24, and the first fastening member 29a may be partially located in the inner hole of the first limiting member 28a. The first swing arm 24, the first limiting member 28a, and the first fastening member 29a may be sleeved in sequence.

[0328] Among them, the first limiting member 28a may include a circular ring portion 281 and an abutting portion 282. The abutting portion 282 is fixed to the inner peripheral edge of the circular ring portion 281 and protrudes toward one side of the circular ring portion 281 relative to the circular ring portion 281. Among them, the first limiting member 28a may be a gasket. The first limiting member 28a may be made of a metal material or other hard materials. Among them, the first limiting member 28a may be entirely made of wear-resistant material, or a wear-resistant layer may be provided on the surface of the first limiting member 28a facing the first swing arm 24. Among them, the first fastening member 29a may be a screw or the like, and this embodiment does not strictly limit this. Among them, the inner peripheral side surface of the first limiting member 28a may be a conical surface, and a wedge-shaped mating structure may be formed between the first fastening member 29a and the inner peripheral side surface of the first limiting member 28a.

[0329] Please refer to Figure 25 , Figure 25 is Figure 9 a schematic structural view of a part of the structure of the folding mechanism 20 shown.

[0330] In some embodiments, among them, the second swing arm 44 may include a first end 441, a swinging portion 442, and a second end 443 that are connected in sequence.

[0331] Exemplarily, the first end 441 of the second swing arm 44 may include a third pin shaft 4411. The second end 443 of the second swing arm 44 may include a fourth pin shaft 4431. A second swinging hole 4421 may be formed in the swinging portion 442 of the second swing arm 44.

[0332] In some implementations, the structure of the second swing arm 44 may be the same as or symmetrical to the structure of the first swing arm 24, and this embodiment does not strictly limit this.

[0333] In some embodiments, the folding mechanism 20 may further include a second limiting member 28b and a second fastening member 29b. Among them, the second limiting member 28b may be installed in the second swinging hole 4421 of the second swing arm 44, and the second fastening member 29b may be partially located in the inner hole of the second limiting member 28b.

[0334] In some embodiments, the structure of the second limiting member 28b may be the same as or similar to that of the first limiting member 28a, and the structure of the second fastener 29b may be the same as or similar to that of the first fastener 29a. This embodiment does not strictly limit this.

[0335] Please refer to Figure 26 and Figure 27 , Figure 26 which Figure 9 is another schematic structural view of the folding mechanism 20 shown in Figure 27 and Figure 26 is a cross-sectional view of a partial structure of the folding mechanism 20 shown in

[0336] In some embodiments, the first swing arm 24 may be rotatably connected to the first rotating arm 21, and the first swing arm 24 is also respectively movably connected to the first sliding arm 23 and the first bracket 1. At this time, the first swing arm 24 is mounted on the first rotating arm 21, and the first swing arm 24 can follow the first rotating arm 21 and slide relative to the first bracket 1. When the first rotating arm 21 and the first sliding arm 23 slide relative to the first bracket 1, due to the stroke difference between the first rotating arm 21 and the first sliding arm 23, the first swing arm 24 swings relative to the first rotating arm 21. At this time, the first rotating arm 21, the first connecting arm 22, and the first bracket 1 jointly drive the first swing arm 24 to swing, and the rotation center of the first swing arm 24 may be the axis of the first swing hole 2421. Among them, swinging can be understood as swaying with a base point or pivot point; swinging can also be understood as reciprocating motion around a certain axis within a certain angle range.

[0337] In the embodiments of the present application, by providing the first rotating arm 21, the first connecting arm 22, and the first sliding arm 23, both the first rotating arm 21 and the first sliding arm 23 can rotate relative to the main shaft 3, and both the first rotating arm 21 and the first sliding arm 23 can slide relative to the first bracket 1, so that the first bracket 1 can rotate and slide relative to the main shaft 3.

[0338] Moreover, by forming a lever structure at the joints between the first swing arm 24 and the first sliding arm 23, the first bracket 1, and the first rotating arm 21 respectively, the sliding of the first rotating arm 21 relative to the first bracket 1 and the sliding of the first sliding arm 23 relative to the bracket are restricted. At this time, when the first bracket 1 is subjected to a torque relative to the main shaft 3, the main shaft 3 and the first bracket 1 rotate relative to each other. The first bracket 1 drives the first rotating arm 21, the first connecting arm 22, the first sliding arm 23, and the first swing arm 24 to move. Both the first rotating arm 21 and the first sliding arm 23 slide relative to the first bracket 1. Since the rotation axes of the first rotating arm 21 and the first sliding arm 23 do not coincide, the sliding distances of the first rotating arm 21 and the first sliding arm 23 relative to the first bracket 1 are different, and there is a stroke difference between the first rotating arm 21 and the first sliding arm 23 on the first bracket 1. Through the lever structure of the first swing arm 24, this stroke difference is realized as the relative displacement between the first bracket 1 and the main shaft 3, causing the first bracket 1 to approach or move away from the main shaft 3. Among them, when the first bracket 1 is subjected to a folding torque relative to the main shaft 3, the first bracket 1 approaches the main shaft 3; when the first bracket 1 is subjected to an opening torque relative to the main shaft 3, the first bracket 1 moves away from the main shaft 3.

[0339] Exemplarily, the first end 241 of the first swing arm 24 is movably connected to the first sliding arm 23, the swing portion 242 of the first swing arm 24 is rotatably connected to the sliding end 212 of the first rotating arm 21, and the second end 243 of the first swing arm 24 is movably connected to the first bracket 1. At this time, the rotation center of the first swing arm 24 is located at the swing portion 242 of the first swing arm 24, and the first end 241 and the second end 243 of the first swing arm 24 swing relative to the swing portion 242 of the first swing arm 24; the swing amplitude of the first swing arm 24 is small, and the occupied space of the first swing arm 24 is small, which is beneficial to the miniaturized design of the folding mechanism 20.

[0340] Among them, the overall structure of the first bracket 1 is generally flat. The rotation axis of the first swing arm 24 relative to the first rotating arm 21 can be parallel to the thickness direction of the first bracket 1. The swing of the first swing arm 24 can form a swing plane, and the swing plane can be parallel or substantially parallel to the flat direction of the first bracket 1. Moreover, since the first rotating arm 21 can be in a Z-shaped structure, the sliding end 212 of the first rotating arm 21 and the sliding part of the first sliding arm 23 can be at substantially the same height in the thickness direction of the first bracket 1, which is beneficial to reducing the thickness space occupied by the first swing arm 24, the first rotating arm 21, the first sliding arm 23, and the first bracket 1, and is beneficial to the thin design of the folding mechanism 20.

[0341] Among them, the first fastener 29a fixedly connects the first limiting member 28a and the sliding end 212 of the first rotating arm 21. The first limiting member 28a abuts against the sliding end 212 of the first rotating arm 21 and forms an annular groove, and a partial structure of the swinging portion 242 is located in the annular groove. At this time, the annular groove is formed by the first limiting member 28a and the sliding end 212 of the first rotating arm 21, so that the swinging portion 242 of the first rotating arm 21 can rotate in the annular groove, and the structure is simple and easy to manufacture.

[0342] For example, the first swinging hole 2421 of the first swing arm 24 can be sleeved on the first convex column 2123 of the first rotating arm 21, so that the first swing arm 24 is rotatably connected to the first convex column 2123. The first fastener 29a can pass through the first limiting member 28a and be threadedly connected to the first convex column 2123 in the first mounting hole 2124 (see Figure 14 ), so that the first limiting member 28a is fixedly connected to the first convex column 2123, and the abutting portion 282 of the first limiting member 28a abuts against the first convex column 2123. At this time, an annular groove is formed between the first limiting member 28a and the first convex column 2123, and the sliding block 2422 formed by a partial structure of the swinging portion 242 can be located in the annular groove. Among them, a gap can be left between the annular portion 281 of the first limiting member 28a and the sliding block 2422, so that the first limiting member 28a does not exert an abutting pressure on the first swing arm 24. In this embodiment, the sliding block 2422 can rotate relative to the annular groove, so that the first swing arm 24 can rotate around the first convex column 2123, so that the first swing arm 24 can rotate relative to the first rotating arm 21, and is beneficial to improving the rotational accuracy of the relative rotation between the first swing arm 24 and the first rotating arm 21.

[0343] Exemplarily, the first pin shaft 2411 of the first swing arm 24 can be slidably connected to the first track groove 2323 of the first sliding arm 23. For example, the first pin shaft 2411 of the first swing arm 24 can be located in the first track groove 2323 of the first sliding arm 23, the outer wall of the first pin shaft 2411 of the first swing arm 24 can contact the groove wall of the first track groove 2323, and the first pin shaft 2411 can move in the first track groove 2323. The second pin shaft 2431 of the first swing arm 24 is slidably connected to the second track groove 17 of the first bracket 1. For example, the second pin shaft 2431 of the first swing arm 24 is located in the second track groove 17 of the first bracket 1, the outer wall of the second pin shaft 2431 of the first swing arm 24 can contact the side wall of the second track groove 17, and the second pin shaft 2431 can move in the second track groove 17.

[0344] In this embodiment, when the first swing arm 24 rotates relative to the first rotating arm 21, the first pin shaft 2411 can move within the first track groove 2323, and the second pin shaft 2431 can move within the second track groove 17. The first track groove 2323 can constrain the first pin shaft 2411 to form a pin shaft connection, and the second track groove 17 can constrain the second pin shaft 2431 to form a pin shaft connection, so as to convert the stroke difference between the first rotating arm 21 and the first sliding arm 23 relative to the first bracket 1 into the movement of the first bracket 1 relative to the main shaft 3.

[0345] Among them, the first track groove 2323 and the second track groove 17 can be designed in pairs. The folding mechanism 20 can adjust the relative positions of the joints among the first swing arm 24, the first bracket 1, the first rotating arm 21, and the first sliding arm 23 when the first swing arm 24 is at different rotation angles by designing the positions and shapes of the first track groove 2323 and the second track groove 17, so as to control the moving distance of the first bracket 1 relative to the main shaft 3, which is beneficial to realizing the constant length design during the deformation process of the folding mechanism 20.

[0346] In the embodiment of the present application, the first swing arm 24 can be rotatably connected to one of the first sliding arm 23, the first bracket 1, and the first rotating arm 21, and respectively movably connected to the other two of them. The joints of the first swing arm 24 with the first sliding arm 23, the first bracket 1, and the first rotating arm 21 can be three, namely one rotating joint and two movable joints, and the three joints form a lever structure; the first swing arm 24 can swing around the rotation axis of its rotating joint and move at the two movable joints to adapt to the swing of the first swing arm 24. For example, in some other embodiments, the first swing arm 24 can be rotatably connected to the first bracket 1 and movably connected to the first sliding arm 23 and the first rotating arm 21; or, the first swing arm 24 can be rotatably connected to the first sliding arm 23 and movably connected to the first bracket 1 and the first rotating arm 21.

[0347] In some embodiments, as Figure 26 shown, the second swing arm 44 is rotatably connected to the second rotating arm 41, and the second swing arm 44 is movably connected to the second sliding arm 43 and the second bracket 5. At this time, the second swing arm 44 is installed on the second rotating arm 41, and the second swing arm 44 can follow the second rotating arm 41 to slide relative to the second bracket 5. When the second rotating arm 41 and the second sliding arm 43 slide relative to the second bracket 5, due to the stroke difference between the second rotating arm 41 and the second sliding arm 43, the second swing arm 44 swings relative to the second rotating arm 41. At this time, the second rotating arm 41, the second connecting arm 42, and the second bracket 5 jointly drive the second swing arm 44 to swing.

[0348] In this embodiment, by providing the second rotating arm 41, the second connecting arm 42, and the second sliding arm 43, both the second rotating arm 41 and the second sliding arm 43 can rotate relative to the main shaft 3, and both the second rotating arm 41 and the second sliding arm 43 can slide relative to the second bracket 5; that is, the second bracket 5 can rotate and slide relative to the main shaft 3.

[0349] Moreover, by forming a lever structure at the joints between the second swing arm 44 and the second sliding arm 43, the second bracket 5, and the second rotating arm 41 respectively, the sliding of the second rotating arm 41 relative to the second bracket 5 and the sliding of the second sliding arm 43 relative to the bracket are restricted. At this time, when the second bracket 5 is subjected to a torque relative to the main shaft 3, the main shaft 3 and the second bracket 5 rotate relative to each other. The second bracket 5 drives the second rotating arm 41, the second connecting arm 42, the second sliding arm 43, and the second swing arm 44 to move synchronously. Both the second rotating arm 41 and the second sliding arm 43 slide relative to the second bracket 5. Since the rotation axes of the second rotating arm 41 and the second sliding arm 43 do not coincide, the sliding distances of the second rotating arm 41 and the second sliding arm 43 relative to the second bracket 5 are different, and there is a stroke difference between the second rotating arm 41 and the second sliding arm 43 on the second bracket 5. Through the lever structure of the second swing arm 44, this stroke difference is realized as the relative displacement between the second bracket 5 and the main shaft 3, causing the second bracket 5 to approach or move away from the main shaft 3. Among them, when the second bracket 5 is subjected to a folding torque relative to the main shaft 3, the second bracket 5 approaches the main shaft 3; when the second bracket 5 is subjected to an opening torque relative to the main shaft 3, the second bracket 5 moves away from the main shaft 3.

[0350] Exemplarily, the first end 441 of the second swing arm 44 is movably connected to the second sliding arm 43, the swinging portion 442 of the second swing arm 44 is rotatably connected to the sliding end 412 of the second rotating arm 41, and the second end 443 of the second swing arm 44 is movably connected to the second bracket 5. At this time, the rotation center of the second swing arm 44 is located at the swinging portion 442 of the second swing arm 44, and the first end 441 and the second end 443 of the second swing arm 44 can swing relative to the swinging portion 242 of the second swing arm 44; the swinging amplitude of the second swing arm 44 is small, and the occupied space of the second swing arm 44 is small, which is beneficial to the miniaturized design of the folding mechanism 20.

[0351] Among them, the overall structure of the second bracket 5 is generally flat. The rotation axis of the relative rotation between the second swing arm 44 and the second rotating arm 41 can be parallel to the thickness direction of the second bracket 5. The swing of the second swing arm 44 can form a swing plane, and the swing plane can be parallel to the flat direction of the second bracket 5. Moreover, since the second rotating arm 41 can be in a Z-shaped structure, the sliding end 412 of the second rotating arm 41 and the sliding part of the second sliding arm 43 can occupy substantially the same height space in the thickness direction of the second bracket 5, which is beneficial to reducing the thickness space occupied by the second swing arm 44, the second rotating arm 41, the second sliding arm 43 and the second bracket 5, and is beneficial to the thin design of the folding mechanism 20.

[0352] Among them, the second fastener 29b fixedly connects the second limiting member 28b and the sliding end 412 of the second rotating arm 41. The second limiting member 28b abuts against the sliding end 412 of the second rotating arm 41 and forms an annular groove, and a partial structure of the swinging portion 442 is located in the annular groove. In some examples, the connection relationship among the second fastener 29b, the second limiting member 28b and the second rotating arm 41 can refer to the connection relationship among the first fastener 29a, the first limiting member 28a and the first rotating arm 21, which will not be elaborated in this embodiment.

[0353] Among them, the third pin shaft 4411 of the second swing arm 44 is slidably connected to the third track groove 4323 of the second sliding arm 43. For example, the third pin shaft 4411 of the second swing arm 44 can be located in the third track groove 4323 of the second sliding arm 43, the outer wall of the third pin shaft 4411 of the second swing arm 44 can contact the groove wall of the third track groove 4323, and the third pin shaft 4411 can move in the third track groove 4323. The fourth pin shaft 4431 of the second swing arm 44 is slidably connected to the fourth track groove 57 of the second bracket 5. For example, the fourth pin shaft 4431 of the second swing arm 44 is located in the fourth track groove 57 of the second bracket 5, and the outer wall of the second pin shaft 2431 can contact the side wall of the fourth track groove 57.

[0354] In this embodiment, when the second swing arm 44 rotates relative to the second rotating arm 41, the third pin shaft 4411 can move in the third track groove 4323, and the fourth pin shaft 4431 can move in the fourth track groove 57. The third track groove 4323 is used to restrict the third pin shaft 4411, and the fourth track groove 57 can restrict the fourth pin shaft 4431 to form a pin connection, so as to convert the stroke difference between the second rotating arm 41 and the second sliding arm 43 relative to the second bracket 5 into the movement of the second bracket 5 relative to the main shaft 3.

[0355] Among them, the third track groove 4323 and the fourth track groove 4323 can be designed in pairs. The folding mechanism 20 can adjust the relative positions of the joints among the second swing arm 44, the second support 5, the second rotating arm 41, and the second sliding arm 43 when the second swing arm 44 is at different rotation angles by designing the positions and shapes of the third track groove 4323 and the fourth track groove 57, so as to control the moving distance of the second support 5 relative to the main shaft 3, which is beneficial to realizing the constant length design during the deformation process of the folding mechanism 20.

[0356] In the embodiments of the present application, the second swing arm 44 can be rotatably connected to one of the second rotating arm 41, the second support 5, and the second sliding arm 43, and respectively movably connected to the other two of them. The joints where the second swing arm 44 is connected to the second sliding arm 43, the second support 5, and the second rotating arm 41 can correspond to three, namely one rotating joint and two movable joints, and the three joints form a lever structure; the first swing arm 24 can swing around the rotation axis of its rotating joint and move at the two movable joints to adapt to the swing of the second swing arm 44. For example, in some other embodiments, the second swing arm 44 can be rotatably connected to the second support 5 and movably connected to the second sliding arm 43 and the second rotating arm 41; or the second swing arm 44 can be rotatably connected to the second sliding arm 43 and movably connected to the second support 5 and the second rotating arm 41.

[0357] In some embodiments, the third swing arm 26 can form a group with the first swing arm 24. The middle of the third swing arm 26 is connected to the third rotating arm 25, one end of the third swing arm 26 is connected to the first sliding arm 23, and the other end of the third swing arm 26 is connected to the first support 1. In some examples, the third swing arm 26 and the first swing arm 24 can be symmetrically structured in the length direction of the folding mechanism 20. Both the third swing arm 26 and the first swing arm 24 are movably connected to the first sliding arm 23, and the third swing arm 26 and the first swing arm 24 move synchronously relative to the first sliding arm 23; by setting the third swing arm 26, the torque on the first sliding arm 23 can be balanced, so that the force on the first sliding arm 23 is more balanced and the movement is more stable.

[0358] In some embodiments, the fourth swing arm 46 can form a group with the second swing arm 44. The middle of the fourth swing arm 46 is connected to the fourth rotating arm 45, one end of the fourth swing arm 46 is connected to the second sliding arm 43, and the other end of the fourth swing arm 46 is connected to the second support 5. The fourth swing arm 46 and the second swing arm 44 can be symmetrically structured in the length direction of the folding mechanism 20, and the principle is similar to that of the third swing arm 26 and the first swing arm 24, so it will not be elaborated in this embodiment. By setting the fourth swing arm 46, the torque on the second sliding arm 43 can be balanced, so that the force on the second sliding arm 43 is more balanced and the movement is more stable.

[0359] In the present embodiment of the application, both the first bracket 1 and the second bracket 5 can rotate synchronously relative to the main shaft 3. Among them, the rotation of the first bracket 1 and the second bracket 5 relative to the main shaft 3 is the main movement of the folding mechanism 20, and the synchronous rotation of the first bracket 1 and the second bracket 5 is the synchronous movement of the folding mechanism.

[0360] For the main movement, by adopting the stroke difference between the first rotating arm 21 and the first sliding arm 23 relative to the first bracket 1, and linking it with the lever connection structure of the first swing arm 24 with the first bracket 1, the first rotating arm 21, and the first sliding arm 23; and by adopting the stroke difference between the second rotating arm 41 and the second sliding arm 43 relative to the second bracket 5, and linking it with the lever connection structure of the second swing arm 44 with the second bracket 5, the second rotating arm 41, and the second sliding arm 43, the design of a constant trajectory length is achieved when the first bracket 1 and the second bracket 5 rotate relative to the main shaft 3.

[0361] Among them, the constant trajectory length is not strictly limited to the length remaining completely unchanged. In the case where the length change fluctuation is very small, it can also be regarded as a constant trajectory length. Most traditional folding solutions, even if the lengths in the open state and the closed state are made equal, during the rotation process, that is, during the switching process between the open state and the closed state, the length change fluctuation is obvious, resulting in the screen being squeezed and pulled during this process and being easily damaged.

[0362] Please refer to Figure 26 、 Figure 28 and Figure 29 , Figure 28 is Figure 9 a partial structural schematic diagram of the folding mechanism 20 in the open state shown in Figure 29 is Figure 9 a cross-sectional view of a partial structure of the folding mechanism 20 in the closed state shown in

[0363] When the folding mechanism 20 is in the open state, the main shaft 3 is between the first bracket 1 and the second bracket 5, and the main shaft 3 is the farthest from both the first bracket 1 and the second bracket 5. At this time, the opening angles of the first rotating arm 21 and the second rotating arm 41 are the largest. When the angle between the first bracket 1 and the second bracket 5 is 180°, the opening angles of the first rotating arm 21 and the second rotating arm 41 can also be 180°.

[0364] When the folding mechanism 20 is in the closed state, the main shaft 3 is between the first bracket 1 and the second bracket 5, the main shaft 3 is the closest to both the first bracket 1 and the second bracket 5, and there is almost no gap between the main shaft 3 and the first bracket 1 and the second bracket 5 on the top side (please refer to Figure 8 ). At this time, the opening angles of the first rotating arm 21 and the second rotating arm 41 are the smallest. When the angle between the first bracket 1 and the second bracket 5 is 0°, the opening angles of the first rotating arm 21 and the second rotating arm 41 can also be 0°.

[0365] During the process of folding the first bracket 1 and the second bracket 5 from the open state to the closed state, the first bracket 1 and the second bracket 5 gradually approach the main shaft 3. During the process of folding the first bracket 1 and the second bracket 5 from the closed state to the open state, the first bracket 1 and the second bracket 5 gradually move away from the main shaft 3, thereby maintaining a constant length of the folding mechanism 20.

[0366] When the folding mechanism 20 is in the open state, the rotational connection point (at the first connecting shaft 71) between the first connecting arm 22 and the first sliding arm 23 is located between the main shaft 3 and the first bracket 1, and the rotational connection point (at the second connecting shaft 72) between the second connecting arm 42 and the second sliding arm 43 is located between the main shaft 3 and the second bracket 5. Thus, the first connecting arm 22 and the second connecting arm 42 can open to a larger angle without the need for the main shaft 3 to leave too much movement space for the first connecting arm 22 and the second connecting arm 42, and the integrity of the main shaft 3 is better. In addition, the above rotational connection points can also appropriately fill the local gaps between the first bracket 1 and the main shaft 3 and the local gaps between the second bracket 5 and the main shaft 3, improving the overall support environment of the folding mechanism 20 for the flexible display screen.

[0367] When the folding mechanism 20 is in the closed state, the rotational connection point (at the first connecting shaft 71) between the first connecting arm 22 and the first sliding arm 23 moves to the middle of the first bracket 1, and the rotational connection point (at the second connecting shaft 72) between the second connecting arm 42 and the second sliding arm 43 moves to the middle of the second bracket 5. At this time, the first sliding arm 23 slides to the farthest position of the first connecting groove 15 of the first bracket 1, and the second sliding arm 43 slides to the farthest position of the second connecting groove 55 of the second bracket 5; the first sliding arm 23 slides a farther distance on the first bracket 1 compared to the first rotating arm 21, and the second sliding arm 43 slides a farther distance on the second bracket 5 compared to the second rotating arm 41. At this time, the end face of the sliding end 212 of the first rotating arm 21 and the end face of the first sliding arm 23 can be coplanar, and the end face of the sliding end 412 of the second rotating arm 41 and the end face of the second sliding arm 43 can be coplanar, making full use of the space of the first folding mechanism 20 and facilitating the miniaturization of the folding mechanism 20.

[0368] In some embodiments, the first swing arm 24 can be rotatably connected to the first rotating arm 21, and the first swing arm 24 is respectively movably connected to the first sliding arm 23 and the first bracket 1. The second swing arm 44 is rotatably connected to the second rotating arm 41, and the second swing arm 44 is movably connected to the second sliding arm 43 and the second bracket 5.

[0369] When the folding mechanism 20 is in the open state, at this time, the first pin shaft 2411 of the first swing arm 24 is located at one end of the first track groove 2323 close to the main shaft 3, and the second pin shaft 2431 of the first swing arm 24 is located at one end of the second track groove 17 close to the main shaft 3.

[0370] When the folding mechanism 20 is in the folded state, at this time, the first pin shaft 2411 of the first swing arm 24 is located at one end of the first track groove 2323 away from the main shaft 3, and the second pin shaft 2431 of the first swing arm 24 is located at one end of the second track groove 17 away from the main shaft 3.

[0371] During the process of the first bracket 1 and the second bracket 5 being folded from the open state to the closed state, the first swing arm 24 and the second swing arm 44 swing, so that the first bracket 1 and the second bracket 5 gradually approach the main shaft 3, thereby maintaining the constant length of the folding mechanism 20.

[0372] Please continue to refer to Figure 26 , in this embodiment, the first connecting arm 22, the second connecting arm 42, the first sliding arm 23, and the second sliding arm 43 can form a synchronous component to make the first bracket 1 and the second bracket 5 rotate synchronously. In this embodiment, the synchronous component is reused as a component to assist the main movement, reducing the number of parts of the folding mechanism 20, improving the integration degree of the folding mechanism 20, occupying a small space, and being beneficial to the miniaturization and thinning design of the folding mechanism. In addition, the synchronous component adopts a two-stage connecting rod structure. The connection between the synchronous component and the main shaft 3, the connection between the synchronous component and the first bracket 1 and the second bracket 5, the connection between the first connecting arm 22 and the first sliding arm 23 in the same group component, and the connection between the second connecting arm 42 and the second sliding arm 43 are all low-pair connections, with high synchronous accuracy and good performance. Moreover, by adopting a two-stage connecting rod structure, the synchronous component can reduce the structural damage to the main shaft 3, the first bracket 1, and the second bracket 5, making the structure between the main shaft 3 and the first bracket 1 and the second bracket 5 seamless or approximately seamless when closed, which is beneficial to improving the anti-extrusion ability of the flexible display screen 200, thereby reducing the risk of damage to the flexible display screen 200 when it drops.

[0373] Please continue to refer to Figure 26 , in this embodiment, the rotational connection structures are all solid shaft connection structures. For example, the rotational end 211 of the first rotational arm 21 and the main shaft 3 are rotationally connected by a solid shaft, and the rotational end 411 of the second rotational arm 41 and the main shaft 3 are rotationally connected by a solid shaft; the first connecting arm 22 and the first sliding arm 23 are connected by a solid shaft, and the second connecting arm 42 and the second sliding arm 43 are connected by a solid shaft; the first connecting arm 22 and the main shaft 3 are rotationally connected by a solid shaft, and the second connecting arm 42 and the main shaft 3 are rotationally connected by a solid shaft. The connection between two components connected by a solid shaft is more reliable, and the solid shaft can also have a smaller width and thickness, which is beneficial to reducing the occupied space of the rotational connection structure, making the structure of the main shaft 3 compact, and the overall volume of the main shaft 3 small, thereby being beneficial to the thinning design of the main shaft 3 and the folding mechanism 20.

[0374] Please continue to refer to Figure 26In this embodiment, the sliding end 212 of the first rotating arm 21 and the first bracket 1, the first sliding arm 23 and the first bracket 1, the sliding end 412 of the second rotating arm 41 and the second bracket 5, and the second sliding arm 43 and the second bracket 5 are all connected by sliding pairs, which are low-pair connections; at this time, the virtual position between the sliding connection structures is small, and the shaking is small, so that the connection structure is more reliable, the folding mechanism 20 is more flat, and the electronic device 1000 (see Figure 1 ) is flatter after opening; and the overlapping area of ​​the sliding connection structure is larger, the stress per unit area is smaller, and the wear of the sliding connection structure is less, thereby extending the bending life of the folding mechanism 20.

[0375] Please refer to Figure 19 and Figure 20 , in some embodiments, Figure 19 The first connecting arm 22, the first sliding arm 23, the second connecting arm 42 and the second sliding arm 43 shown in the figure can also form an independent synchronization component to play a synchronization role.

[0376] Exemplarily, the first connecting arm 22 , the first sliding arm 23 , the second connecting arm 42 and the second sliding arm 43 may be applied to the main shaft 3 , the first bracket 1 and the second bracket 5 .

[0377] Among them, the first connecting arm 22 has a first end 221 and a second end 222, the first end 221 of the first connecting arm 22 has a first tooth portion 2212, and the second end 222 of the first connecting arm 22 is rotatably connected to the first end 231 of the first sliding arm 23; the second connecting arm 42 has a first end 421 and a second end 422, the first end 421 of the second connecting arm 42 has a second tooth portion 4212, and the second end 422 of the second connecting arm 42 is rotatably connected to the first end 431 of the second sliding arm 43; the first tooth portion 2212 and the second tooth portion 4212 are meshed; the first end 221 of the first connecting arm 22 is rotatably connected to the main shaft 3, and the second end 232 of the first sliding arm 23 is slidably connected to the first bracket 1; the first end 421 of the second connecting arm 42 is used to be rotatably connected to the main shaft 3, and the second end 432 of the second sliding arm 43 is slidably connected to the second bracket 5, so that when the first bracket 1 and the second bracket 5 rotate, the first bracket 1 and the second bracket 5 rotate synchronously relative to the main shaft 3. In some examples, the structures of the first connecting arm 22 , the first sliding arm 23 , the second connecting arm 42 and the second sliding arm 43 may refer to the relevant schemes of the previous embodiments, and will not be described in detail in this embodiment.

[0378] In some embodiments, the first sliding arm 23 may have a first sliding portion 2322, the first bracket 1 may have a first connection groove 15, and the first sliding portion 2322 may be in sliding connection with the first connection groove 15 and in surface contact; the second sliding arm 43 may have a second sliding portion 4322, the second bracket 5 may have a second connection groove 55, and the second sliding portion 4322 may be in sliding connection with the second connection groove 55 and in surface contact. The connection structure between the first sliding arm 23 and the first bracket 1 and the connection structure between the second sliding arm 43 and the second bracket 5 may refer to the related solutions in the foregoing embodiments, and will not be elaborated in this embodiment.

[0379] In some embodiments, the synchronization component may further include a connecting member 8. The structure of the connecting member 8 may refer to the related solutions in the foregoing embodiments, and will not be elaborated in this embodiment.

[0380] In this embodiment, based on the synchronization component of this embodiment, the virtual positions of the connection structures between the main shaft 3 and the first bracket 1 and between the main shaft 3 and the second bracket 5 are low, so that the virtual positions of the synchronous rotation of the first bracket 1 and the second bracket 5 are low, and the synchronization is good.

[0381] In some embodiments, Figure 19 the shown synchronization component can cooperate with the folding mechanism 20, the first housing 10, and the second housing 30 to form a folding device 100.

[0382] Exemplarily, the folding mechanism 20 may include a main shaft 3, a first bracket 1, a second bracket 5, a first connection mechanism, and a second connection mechanism. The first bracket 1 is fixedly connected to the first housing 10 (see Figure 3 ); the second bracket 5 is fixedly connected to the second housing 30 (see Figure 3 ); the main shaft 3 is connected to the first bracket 1 through the first connection mechanism 2; the main shaft 3 is connected to the second bracket 5 through the second connection mechanism 4.

[0383] Among them, the first connection mechanism and the second connection mechanism may be existing structures or structures similar to those of the present application. For example, the first connection mechanism may include a first rotating member and a first connecting member. One end of the first rotating member is rotatably connected to the main shaft, and the other end is rotatably connected to the first bracket. One end of the first connecting member is rotatably connected to the main shaft, and the other end is slidably connected to the first bracket; the second connection mechanism may include a second rotating member and a second connecting member. One end of the second rotating member is rotatably connected to the main shaft, and the other end is rotatably connected to the second bracket; one end of the second connecting member is rotatably connected to the main shaft, and the other end is slidably connected to the second bracket. At this time, by providing the synchronization component of this embodiment, the synchronization effect is good.

[0384] It should be noted that, without conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0385] It should be noted that all the above-mentioned drawings are exemplary illustrations of this application and do not represent the actual size of the product. Also, the dimensional ratio relationship between components in the drawings does not serve as a limitation on the actual product of this application.

[0386] The above are only some embodiments and implementation manners of this application. The protection scope of this application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by this application, and all of them should be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A folding mechanism (20), characterized in that, It includes a main shaft (3), a first rotating arm (21), a first connecting arm (22), a first sliding arm (23), a first swing arm (24), a first bracket (1), a second rotating arm (41), a second connecting arm (42), a second sliding arm (43), a second swing arm (44) and a second bracket (5); The first rotating arm (21) includes a rotating end (211) and a sliding end (212). The rotating end (211) of the first rotating arm (21) is rotatably connected to the main shaft (3), and the sliding end (212) of the first rotating arm (21) is slidably connected to the first bracket (1). The first connecting arm (22) includes a first end (221) and a second end (222). The first end (221) of the first connecting arm (22) is rotatably connected to the main shaft (3), and the second end (222) of the first connecting arm (22) is rotatably connected to the first end (231) of the first sliding arm (23). The second end (232) of the first sliding arm (23) is slidably connected to the first bracket (1); The first swing arm (24) is rotatably connected to one of the first sliding arm (23), the first bracket (1), and the first rotating arm (21), and is respectively movably connected to the other two of them; The second rotating arm (41) includes a rotating end (411) and a sliding end (412). The rotating end (411) of the second rotating arm (41) is rotatably connected to the main shaft (3), and the sliding end (412) of the second rotating arm (41) is slidably connected to the second bracket (5). The second connecting arm (42) includes a first end (421) and a second end (422). The first end (421) of the second connecting arm (42) is rotatably connected to the main shaft (3), and the second end (422) of the second connecting arm (42) is rotatably connected to the first end (431) of the second sliding arm (43). The second end (432) of the second sliding arm (43) is slidably connected to the second bracket (5); The second swing arm (44) is rotatably connected to one of the second sliding arm (43), the second bracket (5), and the second rotating arm (41), and is respectively movably connected to the other two of them.

2. The folding mechanism (20) according to claim 1, characterized in that, The first swing arm (24) is rotatably connected to the first rotating arm (21), and the first swing arm (24) is movably connected to the first sliding arm (23) and the first bracket (1); The second swing arm (44) is rotatably connected to the second rotating arm (41), and the second swing arm (44) is movably connected to the second sliding arm (43) and the second bracket (5).

3. The folding mechanism (20) according to claim 2, wherein, The first swing arm (24) includes a first end (241), a swing portion (242), and a second end (243) connected in sequence. The first end (241) of the first swing arm (24) is movably connected to the first sliding arm (23). The swing portion (242) is rotatably connected to the sliding end (212) of the first rotating arm (21). The second end (243) of the first swing arm (24) is movably connected to the first bracket (1). When the first bracket (1) and the second bracket (5) are folded from the open state to the closed state, the first swing arm (24) swings. The second swing arm (44) includes a first end (441), a swing portion (442), and a second end (443) connected in sequence. The first end (441) of the second swing arm (44) is movably connected to the second sliding arm (43). The swing portion (442) is rotatably connected to the sliding end (412) of the second rotating arm (41). The second end (443) of the second swing arm (44) is movably connected to the second bracket (5). When the first bracket (1) and the second bracket (5) are folded from the open state to the closed state, the second swing arm (44) swings.

4. The folding mechanism (20) according to claim 3, characterized in that, The first end (241) of the first swing arm (24) has a first pin shaft (2411). The first sliding arm (23) has a first track groove (2323). The first pin shaft (2411) is slidably connected to the first track groove (2323). The second end (243) of the first swing arm (24) has a second pin shaft (2431). The first bracket (1) has a second track groove (17). The second pin shaft (2431) is slidably connected to the second track groove (17). The first end (441) of the second swing arm (44) has a third pin shaft (4411). The second sliding arm (43) has a third track groove (4323). The third pin shaft (4411) is slidably connected to the third track groove (4323). The second end (443) of the second swing arm (44) has a fourth pin shaft (4431). The second bracket (5) has a fourth track groove (57). The fourth pin shaft (4431) is slidably connected to the fourth track groove (57).

5. The folding mechanism (20) according to claim 4, characterized in that, The folding mechanism (20) further includes a first limiting member (28a) and a first fastening member (29a). The first fastening member (29a) fixedly connects the first limiting member (28a) and the sliding end (212) of the first rotating arm (21). The first limiting member (28a) abuts against the sliding end (212) of the first rotating arm (21) and forms an annular groove. A partial structure of the swing portion (242) is located in the annular groove.

6. The folding mechanism (20) according to claim 5, wherein, The sliding end (212) of the first rotating arm (21) is provided with a first convex column (2123). The swing portion (242) sleevs the first convex column (2123). The swing portion (242) is rotatably connected to the first convex column (2123).

7. The folding mechanism (20) according to any one of claims 1 to 5, characterized in that the sliding end (212) of the first rotating arm (21) has a first protrusion (2121), the first bracket (1) has a first sliding groove (13), the first protrusion (2121) is slidably connected to the first sliding groove (13), and a surface contact is formed between the first protrusion (2121) and the groove wall of the first sliding groove (13); the sliding end (412) of the second rotating arm (41) has a second protrusion (4121), the second bracket (5) has a second sliding groove (53), the second protrusion (4121) is slidably connected to the second sliding groove (53), and a surface contact is formed between the second protrusion (4121) and the groove wall of the second sliding groove (53).

8. The folding mechanism (20) according to claim 7, characterized in that, The main shaft (3) is provided with a first rotating hole (31) and a second rotating hole (32), and the second rotating hole (32) and the first rotating hole (31) are arranged at intervals in the width direction of the main shaft (3); the rotating end (211) of the first rotating arm (21) is rotatably connected to the first rotating hole (31), and the rotation axis of the first rotating arm (21) passes through the first rotating hole (31); the rotating end (411) of the second rotating arm (41) is rotatably connected to the second rotating hole (32), and the rotation axis of the second rotating arm (41) passes through the second rotating hole (32).

9. The folding mechanism (20) according to any one of claims 1 to 8, characterized in that, The first bracket (1) has a first connecting groove (15), the first sliding arm (23) has a first sliding part (233), and a surface contact is formed between the first sliding part (233) and the first connecting groove (15); The second bracket (5) has a second connecting groove (55), the second sliding arm (43) has a second sliding part (433), and a surface contact is formed between the second sliding part (433) and the second connecting groove (55).

10. The folding mechanism (20) according to any one of claims 1 to 9, characterized in that, The axis of relative rotation between the second end (222) of the first connecting arm (22) and the first end (231) of the first sliding arm (23) is a first axis (711). When the first bracket (1) and the second bracket (5) are in an open state, the first axis (711) is located between the main shaft (3) and the first bracket (1); The axis of relative rotation between the second end (422) of the second connecting arm (42) and the first end (431) of the second sliding arm (43) is a second axis (721). When the first bracket (1) and the second bracket (5) are in an open state, the second axis (721) is located between the main shaft (3) and the second bracket (5).

11. The folding mechanism (20) according to any one of claims 1 to 10, characterized in that, The first end (221) of the first connecting arm (22) has a first tooth part (2212), the first end (421) of the second connecting arm (42) has a second tooth part (4212), and the first tooth part (2212) and the second tooth part (4212) are meshed.

12. The folding mechanism (20) according to claim 11, wherein, The first end (221) of the first connecting arm (22) has a first rotating shaft (2211), the first rotating shaft (2211) is coaxial with the first tooth portion (2212), the main shaft (3) is provided with a first transmission hole (33), and the first rotating shaft (2211) is rotatably connected to the first transmission hole (33); the first end (421) of the second connecting arm (42) has a second rotating shaft (4211), the second rotating shaft (4211) is coaxial with the second tooth portion (4212), the main shaft (3) is provided with a second transmission hole (34), and the second rotating shaft (4211) is rotatably connected to the second transmission hole (34).

13. The folding mechanism (20) according to claim 12, characterized in that, The folding mechanism (20) further includes a connecting member (8), the connecting member (8) sleeving the first rotating shaft (2211) of the first connecting arm (22) and the second rotating shaft (4211) of the second connecting arm (42), and the connecting member (8) is mounted on the main shaft (3).

14. The folding mechanism (20) according to any one of claims 1 to 13, characterized in that, The main shaft (3) has a contact surface (310), one side of the first bracket (1) close to the main shaft (3) has a first transition surface (121), one side of the second bracket (5) close to the main shaft (3) has a second transition surface (521), and both the first transition surface (121) and the second transition surface (521) are arc surfaces; when the first bracket (1) and the second bracket (5) are folded from the open state to the closed state, the first transition surface (121) and the second transition surface (521) approach the contact surface (310).

15. The folding mechanism (20) according to any one of claims 1 to 14, characterized in that, The folding mechanism (20) further includes a third rotating arm (25), a third swing arm (26), a fourth rotating arm (45) and a fourth swing arm (46); The third rotating arm (25) includes a rotating end (251) and a sliding end (252), the rotating end (251) of the third rotating arm (25) is rotatably connected to the main shaft (3), the sliding end (252) of the third rotating arm (25) is slidably connected to the first bracket (1), and the third swing arm (26) is rotatably connected to one of the first sliding arm (23), the first bracket (1) and the third rotating arm (25), and is respectively movably connected to the other two of them; The fourth rotating arm (45) includes a rotating end (451) and a sliding end (452), the rotating end (451) of the fourth rotating arm (45) is rotatably connected to the main shaft (3), the sliding end (452) of the fourth rotating arm (45) is slidably connected to the second bracket (5), and the fourth swing arm (46) is rotatably connected to one of the second sliding arm (43), the second bracket (5) and the fourth rotating arm (45), and is respectively movably connected to the other two of them.

16. The folding mechanism (20) according to claim 15, characterized in that, The third rotating arm (25) and the first rotating arm (21) are symmetrically structured in the length direction of the main shaft (3). The third swing arm (26) and the first swing arm (24) are symmetrically structured in the length direction of the main shaft (3). The fourth rotating arm (45) and the second rotating arm (41) are symmetrically structured in the length direction of the main shaft (3). The fourth swing arm (46) and the second swing arm (44) are symmetrically structured in the length direction of the main shaft (3).

17. A folding device (100), characterized in that, Comprising: A first housing (10); A second housing (30); And A folding mechanism (20) as described in any one of claims 1 to 16 above. The first housing (10) is fixedly connected to the first bracket (1) of the folding mechanism (20); the second housing (30) is fixedly connected to the second bracket (5) of the folding mechanism (20).

18. A synchronization component is applied to a folding mechanism (20), characterized in that, The folding mechanism (20) includes a main shaft (3), a first bracket (1), and a second bracket (5). The synchronization component includes: a first connecting arm (22), a first sliding arm (23), a second connecting arm (42), and a second sliding arm (43); The first connecting arm (22) has a first end (221) and a second end (222). The first end (221) of the first connecting arm (22) has a first tooth portion (2212). The second end (222) of the first connecting arm (22) is rotatably connected to the first end (231) of the first sliding arm (23); The second connecting arm (42) has a first end (421) and a second end (422). The first end (421) of the second connecting arm (42) has a second tooth portion (4212). The second end (422) of the second connecting arm (42) is rotatably connected to the first end (431) of the second sliding arm (43); The first tooth portion (2212) and the second tooth portion (4212) are meshed and connected; The first end (221) of the first connecting arm (22) is used for rotatably connecting to the main shaft (3), and the second end (232) of the first sliding arm (23) is used for slidably connecting to the first bracket (1); the first end (421) of the second connecting arm (42) is used for rotatably connecting to the main shaft (3), and the second end (432) of the second sliding arm (43) is used for slidably connecting to the second bracket (5).

19. The synchronization component according to claim 18, wherein The first end (221) of the first connecting arm (22) has a first rotating shaft (2211). The first rotating shaft (2211) is coaxial with the first tooth portion (2212), and the first rotating shaft (2211) is used for rotatably connecting to the main shaft (3); the first end (421) of the second connecting arm (42) has a second rotating shaft (4211). The second rotating shaft (4211) is coaxial with the second tooth portion (4212), and the second rotating shaft (4211) is used for rotatably connecting to the main shaft (3).

20. The synchronization component according to claim 19, wherein The synchronization component further includes a connecting member (8), and the connecting member (8) is sleeved on the first rotating shaft (2211) of the first connecting arm (22) and the second rotating shaft (4211) of the second connecting arm (42).

21. A folding device (100), characterized in that, Comprising: A first housing (10); A second housing (30); And A folding mechanism (20), the folding mechanism (20) includes a main shaft (3), a first bracket (1), a second bracket (5), a first connecting mechanism (2), a second connecting mechanism (4), and a synchronization component as claimed in any one of claims 18 to 20. The first bracket (1) is fixedly connected to the first housing (10), the second bracket (5) is fixedly connected to the second housing (30), the main shaft (3) is connected to the first bracket (1) through the first connecting mechanism (2), and the main shaft (3) is connected to the second bracket (5) through the second connecting mechanism (4).

22. An electronic device (1000), characterized in that, Comprising: A flexible display screen (200) and a folding device (100) as claimed in claim 17 or 21, and the flexible display screen (200) is mounted on the first housing (10) and the second housing (30) of the folding device (100).

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