Foldable screen device

Abstract

A foldable screen device includes a first frame body, a second frame body, a rotating shaft assembly, and a flexible circuit board. The flexible circuit board passes through the rotating shaft assembly. The rotating shaft assembly includes a shaft seat, a door panel, a first support plate, and a second support plate. The door panel is mounted on the shaft seat. The first support plate and the second support plate are slidably connected to the shaft seat and are distributed on both sides of the door panel. One ends of the first support plate and the second support plate close to the door panel can move away from the door panel, and the other ends of the first support plate and the second support plate away from the door panel can approach each other. The foldable screen device further includes a flexible heat sink. Opposite ends of the flexible heat sink are connected to the first frame body and the second frame body. Opposite ends of the part of the flexible heat sink in the rotating shaft assembly are respectively fixed on a first fixing surface of the first support plate facing the shaft seat and a second fixing surface of the second support plate facing the shaft seat, which can avoid uneven heat dissipation of the two frame bodies and position opposite ends of the part of the flexible heat sink in the rotating shaft assembly.

Description

Technical Field

[0001] This application relates to the field of terminal devices, and particularly to a folding screen device. Background Art

[0002] Currently, a folding screen device generally includes a rotating shaft and two main bodies. The rotating shaft is rotatably connected to the two main bodies. Each main body is provided with electronic components such as a circuit board. In order to achieve electrical connection of the electronic components of the two main bodies, a flexible circuit board passing through the shaft is used to connect the two main bodies. Generally, a redundant length is reserved for the flexible circuit board to achieve the unfolded state and the folded state of the folding screen device. In order to prevent the flexible circuit board from being easily broken or rubbed against other structures, the flexible circuit board can be redundant inside the rotating shaft to reduce the space occupied by the flexible circuit board; or the flexible circuit board can be redundant under the door panel of the rotating shaft, but this will require more space. At the same time, in order to dissipate heat from the electronic components of the two main bodies, a graphite sheet can be laid under the flexible screen that covers the surfaces of the two main bodies at the same time. Specifically, the folding screen device uses two graphite sheets, which are respectively attached to the two main bodies and separated from the rotating shaft area. Therefore, heat cannot be transferred between the two main bodies, which may lead to uneven heat dissipation of the two main bodies. Summary of the Invention

[0003] In view of the above, it is necessary to provide a folding screen device that can avoid uneven heat dissipation of the two main bodies and position the opposite ends of the flexible heat sink at the part of the rotating shaft assembly.

[0004] An embodiment of the present application provides a folding screen device, which includes a first frame body, a second frame body, a rotating shaft assembly and a flexible circuit board. The flexible circuit board passes through the rotating shaft assembly. The rotating shaft assembly includes a shaft seat, a door panel, a first support plate and a second support plate. The door panel is installed on the shaft seat. The first support plate and the second support plate are slidably connected to the shaft seat. The first support plate and the second support plate are distributed on both sides of the door panel. One end of the first support plate close to the door panel and one end of the second support plate close to the door panel can move away from the door panel. One end of the first support plate away from the door panel and one end of the second support plate away from the door panel can approach each other. The folding screen device further includes a flexible heat sink. The flexible heat sink passes through the rotating shaft assembly. Opposite ends of the flexible heat sink are connected to the first frame body and the second frame body. Opposite ends of the part of the flexible heat sink in the rotating shaft assembly are respectively fixed to a first fixing surface of the first support plate facing the shaft seat and a second fixing surface of the second support plate facing the shaft seat.

[0005] In the present application, a flexible heat sink passes through the rotating shaft assembly and is connected to the first housing and the second housing at both ends, so that heat transfer between the first housing and the second housing can be achieved through the flexible heat sink; by fixing the opposite ends of the part of the flexible heat sink in the rotating shaft assembly under the movable first support plate and the movable second support plate, the opposite ends of the part of the flexible heat sink in the rotating shaft assembly can be positioned, and it can be avoided that when the folding screen device is folded or unfolded, the flexible heat sink moves in the length direction, resulting in large deformation and position change of the flexible heat sink.

[0006] According to some embodiments of the present application, in the rotating shaft assembly, the flexible heat sink covers the flexible circuit board.

[0007] In the present application, by covering the flexible circuit board with the flexible heat sink, the space utilization rate of the rotating shaft assembly can be improved.

[0008] According to some embodiments of the present application, the rotating shaft assembly further includes a housing, the shaft seat is installed on the housing, the shaft seat and the housing jointly form a receiving cavity, and the flexible heat sink and the flexible circuit board are partially received in the receiving cavity.

[0009] In the present application, by accommodating the flexible heat sink and the flexible circuit board redundantly in the receiving cavity, the breakage of the flexible circuit board and the flexible heat sink can be avoided, and the occupation of more space of the folding screen device can be avoided.

[0010] According to some embodiments of the present application, a receiving groove is formed on the shaft seat, the receiving groove penetrates through the shaft seat, the shaft seat and the housing jointly form the receiving cavity at the receiving groove, and a cross plate is further formed on the shaft seat at the receiving groove, and the cross plate is separated from the housing; the middle section position of the flexible heat sink is fixed on the surface of the cross plate facing the housing.

[0011] In the present application, by forming a cross plate on the shaft seat at the receiving cavity for accommodating the flexible heat sink and fixing the middle section position of the flexible heat sink under the cross plate, the middle section position of the flexible heat sink can be positioned, and the flexible heat sink can be divided into two sections with close lengths in the length direction, so that the displacement and bending deformation generated when the folding screen device is folded or unfolded are smaller, and the displacement and bending amount are easier to control.

[0012] According to some embodiments of the present application, the cross plate extends from the first side wall of the shaft seat near the receiving groove to the second side wall opposite to the first side wall, and is separated from other side walls of the shaft seat near the receiving groove.

[0013] According to some embodiments of the present application, the transverse plate and the shaft seat form a first interval and a second interval on other side walls near the receiving groove, and the flexible heat sink and the flexible circuit board enter the accommodating cavity through the first interval and leave the accommodating cavity through the second interval.

[0014] In the present application, a first interval and a second interval are formed by the transverse plate and the shaft seat, so that the flexible heat sink and the flexible circuit board enter the accommodating cavity through the first interval and leave the accommodating cavity through the second interval, enabling the flexible heat sink and the flexible circuit board to pass through the rotating shaft assembly.

[0015] According to some embodiments of the present application, the outer shell includes an inner shell surface and a positioning member. The positioning member is fixedly installed on the inner shell surface and is located within the accommodating cavity. The transverse plate and the positioning member are spaced apart from each other and jointly position the middle sections of the flexible circuit board and the flexible heat sink.

[0016] In the present application, the positioning member installed within the outer shell and the transverse plate jointly position the middle sections of the flexible circuit board and the flexible heat sink, enabling the flexible circuit board and the flexible heat sink to be divided into two sections with approximately equal lengths in the length direction. This results in smaller displacement and bending deformation of the flexible circuit board and the flexible heat sink when the folding screen device is folded or unfolded, and the displacement and bending amount are easier to control.

[0017] According to some embodiments of the present application, the folding screen device further includes a buffer member. The buffer member is disposed on the positioning member and is spaced apart from the transverse plate. The buffer member is used to avoid damage to the flexible circuit board by the positioning member through elastic deformation.

[0018] In the present application, by disposing the buffer member on the positioning member and spacing it apart from the transverse plate, damage to the flexible circuit board by the positioning member can be avoided. Moreover, the buffer member enables a smaller change in the connection position between the flexible circuit board and the transverse plate, avoiding the risk of the flexible circuit board being stretched and broken.

[0019] According to some embodiments of the present application, the first side of the first frame body and the first side of the second frame body are used to install the flexible screen, and the second side of the first frame body and the second side of the second frame body are used to install electronic components; the opposite ends of the flexible heat sink are connected to the first side of the first frame body and the first side of the second frame body; the opposite ends of the flexible circuit board are connected to the second side of the first frame body and the second side of the second frame body, and the second side is opposite to the first side.

[0020] In the present application, by arranging the flexible heat sink and the flexible circuit board on different sides of the first frame body and the second frame body, heat dissipation of the frame body by the flexible heat sink and connection of the flexible circuit board to the electronic components can be achieved, and interference between the flexible heat sink and the flexible circuit board can be avoided.

[0021] According to some embodiments of the present application, the folding screen device further includes a first bracket, a second bracket, a first synchronous arm, a second synchronous arm, and a cam structure; the first bracket is rotatably connected to the first support plate, the second bracket is rotatably connected to the second support plate, and the first bracket and the second bracket are rotatably connected to the shaft seat; the first synchronous arm is slidably and rotatably connected to the first bracket, and the second synchronous arm is slidably and rotatably connected to the second bracket; the cam structure is disposed on the shaft seat and includes a concave-convex structure, and the first synchronous arm and the second synchronous arm are connected to the cam structure through the concave-convex structure to achieve damping for the rotation of the first bracket and the second bracket.

[0022] In the present application, the first synchronous arm and the second synchronous arm are connected to the cam structure through the concave-convex structure to achieve damping for the rotation of the first bracket and the second bracket, so that the folding or unfolding speed of the folding screen device can be slightly slowed down, the stability of the folding or unfolding of the folding screen device can be improved, and the user experience can be enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. 11 is a schematic structural diagram of a conventional folding screen device in a flattened state.

[0024] Figure 2 FIG. 15 is a schematic structural diagram of a conventional folding screen device in a folded state.

[0025] Figure 3 FIG. 19 is a schematic structural diagram of the folding screen device according to the first embodiment of the present application in a flattened state.

[0026] Figure 4 FIG. 23 is a schematic cross-sectional view of the folding screen device according to the first embodiment of the present application in a flattened state.

[0027] Figure 5 FIG. 27 is a schematic structural diagram of the folding screen device according to the first embodiment of the present application in a folded state.

[0028] Figure 6 FIG. 31 is a schematic cross-sectional view of the folding screen device according to the first embodiment of the present application in a folded state.

[0029] Figure 7 For Figure 4 FIG. 37 is a schematic connection diagram of the rotating shaft assembly, the flexible circuit board, and the graphite of the folding screen device shown.

[0030] Figure 8 For Figure 7 FIG. 43 is an exploded schematic diagram of the rotating shaft assembly of the folding screen device shown.

[0031] Figure 9 ForFigure 8 Schematic structural diagram of the shaft seat of the shown rotating shaft assembly mounted on the housing.

[0032] Figure 10 For Figure 8 Exploded schematic diagram of the damping device of the shown rotating shaft assembly.

[0033] Figure 11 For Figure 8 Assembly schematic diagram of the damping device of the shown rotating shaft assembly.

[0034] Figure 12 Cross-sectional schematic diagram of the folding screen device in the flat state according to the second embodiment of the present application.

[0035] Figure 13 Cross-sectional schematic diagram of the folding screen device in the folded state according to the second embodiment of the present application.

[0036] Figure 14 Exploded schematic diagram of the rotating shaft assembly of the folding screen device in the flat state according to the second embodiment of the present application. Detailed implementation manners

[0037] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present application, words such as "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "for example" is intended to present related concepts in a specific manner.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0039] Please refer to Figure 1 and Figure 2 , Figure 1 which is a schematic structural diagram of a traditional folding screen device in the flat state, Figure 2It is a schematic structural diagram of a traditional folding screen device in a folded state. The folding screen device 1 uses a steel sheet 11 to assist in positioning and threading the two ends of a flexible circuit board 13. Specifically, the folding screen device 1 includes a first frame 14, a second frame 15, and a rotating shaft assembly 16. The rotating shaft assembly 16 is rotatably connected between the first frame 14 and the second frame 15. The flexible circuit board 13 passes through the rotating shaft assembly 16 to connect the first frame 14 and the second frame 15. The steel sheet 11 is pressed above the flexible circuit board 13 and can be fixed to the first frame 14 and the second frame 15 by means such as locking screws or snap fasteners, so as to fix the flexible circuit board 13 on the first frame 14 and the second frame 15 of the folding screen device 1. However, in the area of the rotating shaft assembly 16 of the traditional folding screen device 1, only the flexible circuit board 13 can pass through, and the space utilization rate of the rotating shaft assembly 16 is relatively low, and the heat dissipation of the traditional first frame 14 and second frame 15 is uneven.

[0040] Please refer to Figures 3 to Figure 6 , Figure 3 It is a schematic structural diagram of the folding screen device of the present application in a flattened state. Figure 4 It is an exploded schematic diagram of the folding screen device of the first embodiment of the present application in a flattened state. Figure 5 It is a schematic structural diagram of the folding screen device of the first embodiment of the present application in a folded state. Figure 6 It is an exploded schematic diagram of the folding screen device of the first embodiment of the present application in a folded state. The folding screen device 1 can be a folding screen mobile phone, a folding screen e-book, a folding screen laptop computer, etc. The following takes the application of the embodiment of the present application in a folding screen mobile phone as an example to specifically elaborate on the solution provided by the embodiment of the present application. Figure 3 and Figure 4 The flexible screen is not shown in Figures

[0041] The foldable screen device 3 includes a first frame body 4, a second frame body 5, a rotating shaft assembly 6, a flexible screen 7, a flexible circuit board 8, and a flexible heat sink 9. Electronic components inside the foldable screen device 3, such as circuit boards, processors, memories, batteries, camera modules, earpiece modules, speaker modules, microphone modules, antenna modules, sensor modules, etc., can be respectively fixed on the first frame body 4 and the second frame body 5. The first frame body 4 and the second frame body 5 are rotatably connected through the rotating shaft assembly 6 and can rotate around the rotating shaft assembly 6 to a flattened state or a folded state. The flexible screen 7 covers both the first frame body 4 and the second frame body 5 at the same time. The flexible circuit board 8 passes through the rotating shaft assembly 6 to connect the first frame body 4 and the second frame body 5 to realize the connection of the electronic components in the first frame body 4 and the second frame body 5. The flexible heat sink 9 passes through the rotating shaft assembly 6 and both ends are connected to the first frame body 4 and the second frame body 5, and both ends are fixed on the first frame body 4 and the second frame body 5. Among them, the flexible heat sink 9 and the flexible circuit board 8 pass through the rotating shaft assembly 6 in the same area of the rotating shaft assembly 6. The flexible heat sink 9 can transfer the heat of the first frame body 4 and the heat of the second frame body 5 to each other, so that the temperatures of the first frame body 4 and the second frame body 5 are relatively uniform. The flexible heat sink 9 can be made of a heat-conducting material. The heat-conducting material can be materials such as graphite or carbon fiber. Among them, in order to realize the unfolded state and the folded state of the foldable screen device 3, the flexible circuit board 8 and the flexible heat sink 9 will reserve extra lengths. When the foldable screen device 3 is in the unfolded state, as Figure 3 shown, the first frame body 4 and the second frame body 5 are arranged substantially parallel and coplanar with each other. At this time, the flexible screen 7 unfolds to form a larger display area. Obviously, the first frame body 4 and the second frame body 5 may not be substantially parallel, that is, there may be some deviation of the included angle between the first frame body 4 and the second frame body 5 relative to 180°. For example, the included angle between the first frame body 4 and the second frame body 5 can be 176°, 182°, etc. When the foldable screen device 3 is in the folded state, the first frame body 4 and the second frame body 5 can be completely closed, and there is no gap or a small gap between the first frame body 4 and the second frame body 5, which can play a good role in waterproofing, dustproofing, and preventing foreign objects. The first frame body 4 and the second frame body 5 can completely close to expose the rotating shaft assembly 6. In this way, the first frame body 4, the second frame body 5, and the rotating shaft assembly 6 together constitute the appearance surface of the foldable screen device 3. The flexible screen 7 is also in the folded state and is located inside the foldable screen device 3, and the foldable screen device 3 has a smaller size. It can be understood that the first frame body 4 and the second frame body 5 may not be completely closed, but only the ends of the first frame body 4 and the second frame body 5 away from the rotating shaft assembly 6 are in contact with each other.

[0042] It can be understood that the first frame body 4 and the second frame body 5 can also be in an intermediate state relative to the unfolded state or the folded state. The intermediate state can be any state between the flattened state and the folded state, and the flexible screen 7 moves along with the first frame body 4 and the second frame body 5.

[0043] It is understandable that the folding screen device 3 may include not only two frames, such as the above-mentioned first frame 4 and the above-mentioned second frame 5, but also three or more frames. Each two adjacent frames may be connected by a rotating shaft assembly 6. The flexible screen 7 covers the three or more frames at the same time. Hereinafter, taking the folding screen device 3 including two frames as an example, the solution provided by the embodiments of the present application will be specifically described.

[0044] Combined with Figure 4 and Figure 7 , Figure 7 is a connection schematic diagram of the rotating shaft assembly, flexible circuit board and flexible heat sink of the folding screen device. As Figure 7 shown, in order to prevent the flexible circuit board 8 and the flexible heat sink 9 from being easily broken or rubbed against other structures, the flexible circuit board 8 and the flexible heat sink 9 pass through the rotating shaft assembly 6 and are redundant inside the rotating shaft assembly 6. The flexible circuit board 8 can be positioned at the end position by the first positioning device and the second positioning device. For example, the end position of the flexible circuit board 8 is fixed on the first frame 4 and the second frame 5 by the first steel sheet and the second steel sheet, which can prevent the flexible circuit board 8 from being greatly deformed and displaced when the folding screen device 3 is folded or unfolded. The flexible heat sink 9 is positioned inside the rotating shaft assembly 6 in the rotating shaft assembly 6. Among them, the positioning of the flexible heat sink 9 inside the rotating shaft assembly 6 in the rotating shaft assembly 6 will be further described in detail below.

[0045] Please refer to Figure 8 and Figure 9 , Figure 8 is an exploded schematic diagram of the rotating shaft assembly of the folding screen device, Figure 9 is a schematic diagram of the structure of the shaft seat of the rotating shaft assembly installed on the housing. The rotating shaft assembly 6 includes a housing 60, a shaft seat 61, a first bracket 62, a second bracket 63, a damping device 64, a door panel 65, a first support plate 66, and a second support plate 67.

[0046] The housing 60 includes a housing surface 600 and an installation cavity 601. The housing surface 600 is a smooth surface, and the shaft seat 61 is installed in the installation cavity 601.

[0047] Combined with Figure 6 , Figure 8 and Figure 9, the shaft seat 61 can be installed in the installation cavity 601 of the housing 60 through a fastening structure (such as screws, bolts, etc.), and the shaft seat 61 can also be installed in the installation cavity 601 of the housing 60 by means of gluing, welding, snap-fitting, etc. This application does not make any limitations in this regard. A receiving groove 610 is formed on the shaft seat 61, and the receiving groove 610 penetrates through the shaft seat 61. The shaft seat 61 and the housing 60 jointly form a receiving cavity 611 at the receiving groove 610. The receiving cavity 611 is used to receive the flexible circuit board 8 and the flexible heat sink 9. In this embodiment, the flexible heat sink 9 and the flexible circuit board 8 are partially received in the receiving cavity 611.

[0048] A transverse plate 612 is further formed on the shaft seat 61 at the receiving groove 610. The transverse plate 612 extends from the first side wall 613 of the shaft seat 61 near the receiving groove 610 to the second side wall 614 opposite to the first side wall 613, so that the transverse plate 612 covers a part of the receiving groove 610. The transverse plate 612 is separated from other side walls of the shaft seat 61 near the receiving groove 610 to form a first interval 615 and a second interval 616. Figure 9 In, the transverse plate 612 is separated from the third side wall 617 and the fourth side wall 618 of the shaft seat 61 near the receiving groove 610 to form a first interval 615 and a second interval 616. The transverse plate 612 is separated from the housing 60. The flexible circuit board 8 and the flexible heat sink 9 enter the receiving cavity 611 through the first interval 615, are redundant in the receiving cavity 611, and leave the receiving cavity 611 through the second interval 616. Inside the receiving cavity 611, the flexible heat sink 9 is located above the flexible circuit board 8 and covers the flexible circuit board 8, and the flexible heat sink 9 can be in contact with or not in contact with the flexible circuit board 8. Inside the receiving cavity 611, the size of the flexible heat sink 9 in the length direction of the rotating shaft assembly 6 can be equal to the size of the area occupied by the flexible circuit board 8 in this direction. At this time, the area of the flexible circuit board 8 inside the rotating shaft assembly 6 will be completely covered by the flexible heat sink 9, which can avoid the need for additional space of the rotating shaft assembly 6 to receive the flexible heat sink 9 and improve the space utilization rate of the rotating shaft assembly 6.

[0049] The first bracket 62 can be rotatably connected to the shaft seat 61, the second bracket 63 can be rotatably connected to the shaft seat 61, the first bracket 62 and the second bracket 63 are oppositely arranged on both sides of the shaft seat 61, and the shaft seat 61 is installed inside the housing 60. The first bracket 62 is fixedly connected to the first frame 4, and the second bracket 63 is fixedly connected to the second frame 5. Therefore, when the first bracket 62 rotates relative to the shaft seat 61 and the second bracket 63 rotates relative to the shaft seat 61, the first frame 4 moves relative to the second frame 5, that is, the first bracket 62 drives the first frame 4 and the second bracket 63 drives the second frame 5 to fold or unfold relative to each other.

[0050] Combined with Figure 4 、 Figure 8 、 Figure 9 、 Figure 10and Figure 11 , Figure 10 is an exploded schematic view of the damping device of the rotating shaft assembly, Figure 11 is an assembled schematic view of the damping device of the rotating shaft assembly. The damping device 64 can be installed on the shaft seat 61. The damping device 64 includes a rotating shaft 640, an elastic member 641, a cam structure 642, a first damping arm 643 and a second damping arm 644. The rotating shaft 640 can be installed on the shaft seat 61. The rotating shaft 640 is used to connect the cam structure 642, the first damping arm 643 and the second damping arm 644. In this embodiment, the number of the rotating shafts 640 is multiple. The multiple rotating shafts 640 are arranged at intervals on the shaft seat 61, and the multiple rotating shafts 640 are respectively matched with the cam structure 642, the first damping arm 643 and the second damping arm 644 to realize the rotational connection between the cam structure 642, the first damping arm 643 and the second damping arm 644 and the shaft seat 61. It should be noted that, Figure 9 the number of the rotating shafts 640 in Figure 9 is four, and the solution provided by the embodiment of the present application will be specifically described below by taking the damping device 64 including four rotating shafts 640 as an example. However, the number of the rotating shafts 640 in this embodiment is not limited to four,

[0051] but is only an exemplary representation. The number of the rotating shafts 640 can also be three, five, etc., and can be set according to needs and installation space. The elastic member 641 is sleeved on a partial rotating shaft 640.

[0052] One end of the first damping arm 643 is slidably connected to the first bracket 62, and the other end of the first damping arm 643 is rotatably connected to the shaft seat 61 and engages with the cam structure 642 on the shaft seat 61 through the concave-convex structure 6421. One end of the second damping arm 644 is slidably connected to the second bracket 63, and the other end of the second damping arm 644 is rotatably connected to the shaft seat 61 and engages with the cam structure 642 on the shaft seat 61 through the concave-convex structure 6421. The cam structure 642 is used to impede the movement of the first damping arm 643 and the second damping arm 644 during the movement of the folding screen device 3, slow down the movement of the first bracket 62 and the second bracket 63 driven by the first damping arm 643 and the second damping arm 644, and slow down the movement of the first frame body 4 and the second frame body 5 driven by the first bracket 62 and the second bracket 63, so as to achieve the stability of the folding or unfolding of the first frame body 4 and the second frame body 5 and improve the operation experience of the folding screen device 3.

[0053] The first damping arm 643 includes a movable end 6430, a damping end 6433 and a connecting section 6438, and the connecting section 6438 connects the movable end 6430 and the damping end 6433. A rotating shaft hole 6431 is provided at one end of the movable end 6430 of the first damping arm 643 away from the connecting section 6438. The rotating shaft hole 6431 penetrates the movable end 6430. The first damping arm 643 is slidably connected to the first bracket 62 through the rotating shaft hole 6431. The damping end 6433 of the first damping arm 643 contacts the cam structure 642. The damping end 6433 of the first damping arm 643 includes a second cam 6434. The surface of the second cam 6434 in contact with the first cam 6420 is provided with a concave-convex structure 6421. The second cam 6434 and the first cam 6420 engage with each other through the concave-convex structure 6421. The first damping arm 643 can be an integrally formed structural member to have higher structural strength.

[0054] The second damping arm 644 includes a movable end 6440, a damping end 6443 and a connecting section 6448, and the connecting section 6448 connects the movable end 6440 and the damping end 6443. For the specific structures of the movable end 6440 and the damping end 6443 of the second damping arm 644, refer to the structures of the movable end 6440 and the damping end 6443 of the first damping arm 643, which will not be elaborated here. The second damping arm 644 can be an integrally formed structural member to have higher structural strength.

[0055] During the switching process between the flattened state and the folded state, the first damping arm 643 rotates relative to the shaft seat 61, and the first damping arm 643 slides relative to the first bracket 62 and rotates relative to the first bracket 62. The second damping arm 644 rotates relative to the shaft seat 61, and the second damping arm 644 can slide relative to the second bracket 63 and can rotate relative to the second bracket 63. At this time, the damping device 64 can provide damping for the rotation and sliding of the first damping arm 643 and the second damping arm 644. Specifically, the first damping arm 643 rotates relative to the shaft seat 61, and the damping end 6433 of the first damping arm 643 drives the cam structure 642 to move towards the elastic member 641 through the concave-convex structure 6421, further compressing the elastic member 641 or driving the elastic member 641 to rotate. The second damping arm 644 rotates relative to the shaft seat 61, and the damping end 6443 of the second damping arm 644 drives the cam structure 642 to move towards the elastic member 641 through the concave-convex structure 6421, further compressing the elastic member 641 or driving the elastic member 641 to rotate. Thus, the elastic member 641 can provide the damping force for opening and closing. In this way, during the process of the first damping arm 643 driving the first bracket 62 and the second damping arm 644 driving the second bracket 63 to rotate synchronously, the damping force for opening and closing provided by the elastic member 641 can slow down the folding or unfolding speed of the folding screen device 3, improve the stability of the folding or unfolding of the folding screen device 3, and improve the user experience.

[0056] Among them, since the two first cams 6420 of the cam structure 642 are fixedly connected, the rotation angles of the damping end 6433 of the first damping arm 643 and the damping end 6443 of the second damping arm 644 are the same, so that the rotation actions of the first damping arm 643 and the second damping arm 644 relative to the shaft seat 61 are synchronized. The first damping arm 643 and the second damping arm 644 drive the first bracket 62 and the second bracket 63 to move synchronously, and the first bracket 62 and the second bracket 63 drive the first frame 4 and the second frame 5 to move synchronously, so as to realize the relative folding or relative unfolding of the first frame 4 and the second frame 5 synchronously, and improve the user experience.

[0057] The damping device 64 further includes a synchronization device 645, and the synchronization device 645 can be mounted on the shaft seat 61. The synchronization device 645 is rotatably connected to the shaft seat 61. The other end of the first damping arm 643 is also meshed with the synchronization device 645 on the shaft seat 61 through gears. The other end of the second damping arm 644 is also meshed with the synchronization device 645 on the shaft seat 61 through gears. The synchronization device 645 may include two synchronization gears 6450. The synchronization gear 6450 includes a first rotating portion 6451 and a first gear portion 6453 disposed around the first rotating portion 6451. The first rotating portion 6451 is provided with a first rotating hole 6452, and the first rotating hole 6452 penetrates through the first rotating portion 6451. The first rotating hole 6452 is for the rotating shaft 640 to pass through. The first gear portion 6453 is provided with a plurality of gears, and the plurality of gears protrude relative to the first rotating portion 6451.

[0058] It can be understood that the number of the synchronization gears 6450 can be multiple. The multiple synchronization gears 6450 are arranged in a row, and the first gear portions 6453 of two adjacent synchronization gears 6450 are meshed with each other. Among them, the synchronization gear 6450 can be an integrally formed structural member to have higher structural strength.

[0059] The number, size, etc. of the synchronization gears 6450 of the synchronization device 645 can be designed according to the specific form, size and other models of the product, and the present application does not strictly limit this. Among them, the more the number of the synchronization gears 6450 and the smaller the size of the synchronization gears 6450, the more space can be released. The fewer the number of the synchronization gears 6450 and the larger the size of the synchronization gears 6450, the smaller the transmission cumulative error of the synchronization gears 6450, which is beneficial to improving the movement accuracy.

[0060] The damping end 6433 of the first damping arm 643 further includes a second rotating portion 6435 and a second gear portion 6437 disposed around the second rotating portion 6435. The second rotating portion 6435 is connected to the connecting section 6438 of the first damping arm 643. One end of the second rotating portion 6435 away from the connecting section 6438 of the first damping arm 643 is fixedly connected to the second cam 6434. The second gear portion 6437 is provided with a plurality of gears. The plurality of gears of the second gear portion 6437 are used to mesh with the plurality of gears of the first gear portion 6453. The second rotating portion 6435 is provided with a second rotating hole 6436, and the second rotating hole 6436 penetrates through the second rotating portion 6435. The second rotating hole 6436 is for the rotating shaft 640 to pass through.

[0061] When the first damping arm 643 rotates relative to the shaft seat 61, the damping end 6433 of the first damping arm 643 is also engaged with the damping end 6443 of the second damping arm 644 through the gear of the synchronization device 645, so that the rotation angles of the damping end 6433 of the first damping arm 643 and the damping end 6443 of the second damping arm 644 are the same, and the rotation actions of the first damping arm 643 and the second damping arm 644 relative to the shaft seat 61 are kept synchronized. The first damping arm 643 and the second damping arm 644 drive the first bracket 62 and the second bracket 63 to move synchronously, and the first bracket 62 and the second bracket 63 drive the first housing 4 and the second housing 5 to move synchronously, so as to realize the synchronous relative folding or relative unfolding of the first housing 4 and the second housing 5, and improve the user experience.

[0062] Combined with Figure 6 , Figure 8 and Figure 9 , the door panel 65 is mounted on the shaft seat 61. During the process of switching between the flattened state and the folded state of the folding screen device 3, the door panel 65 can move away from the shaft seat 61 and the door panel 65 can move towards the shaft seat 61. In other words, the door panel 65 is a liftable plate body, and the door panel 65 is liftably connected to the shaft seat 61. Specifically, during the unfolding process of the folding screen device 3, the door panel 65 moves away from the shaft seat 61, that is, the door panel 65 gradually rises to support the flexible screen 7. During the folding process of the folding screen device 3, the door panel 65 moves towards the shaft seat 61, that is, the door panel 65 gradually descends to cooperate with the first support plate 66 and the second support plate 67 to jointly form a receiving space for the flexible screen 7.

[0063] The first support plate 66 is rotatably connected to the first bracket 62 and slidably connected to the shaft seat 61. The first support plate 66 can rotate relative to the first bracket 62 and at the same time slide relative to the shaft seat 61, and there is a gap between the first support plate 66 and the first bracket 62 and the shaft seat 61 for the flexible circuit board 8 and the flexible heat sink 9 to pass through. The first support plate 66 includes a first support surface 660 and a first fixing surface 661 opposite to the first support surface 660. The first support surface 660 is used to support the flexible screen 7. The first fixing surface 661 faces the shaft seat 61 and is used to fix the flexible heat sink 9. The first support plate 66 and the second support plate 67 are distributed on both sides of the door panel 65. The second support plate 67 is rotatably connected to the second bracket 63 and slidably connected to the shaft seat 61. The second support plate 67 can rotate relative to the second bracket 63 and at the same time slide relative to the shaft seat 61, and there is a gap between the second support plate 67 and the second bracket 63 and the shaft seat 61 for the flexible circuit board 8 and the flexible heat sink 9 to pass through. The second support plate 67 includes a second support surface 670 and a second fixing surface 671 opposite to the second support surface 670. The second support surface 670 is used to support the flexible screen 7. The second fixing surface 671 faces the shaft seat 61 and is used to fix the flexible heat sink 9.

[0064] Among them, before the flexible heat sink 9 enters the accommodation cavity 611 through the first interval 615, it can be attached to the first housing 4, and is connected to the first side 41 of the first housing 4 close to the flexible screen 7, and enters the accommodation cavity 611 through the gap between the first support plate 66 and the shaft seat 61, the gap between the first support plate 66 and the first bracket 62, and the first interval 615. After the flexible heat sink 9 leaves the accommodation cavity 611 through the second interval 616, it can be attached to the second housing 5 through the gap between the second support plate 67 and the shaft seat 61 and the gap between the second support plate 67 and the second bracket 63, and is connected to the first side 51 of the second housing 5 close to the flexible screen 7. Among them, the first side 41 of the first housing 4 and the first side 51 of the second housing 5 are provided with the flexible screen 7.

[0065] To avoid large deformation and position change of the flexible heat sink 9 due to its movement in the length direction when the folding screen device 3 is folded or unfolded, the two ends of the flexible heat sink 9 can be positioned. Specifically, before the flexible heat sink 9 enters the receiving cavity 611, the flexible heat sink 9 is fixed on the first fixing surface 661 of the first support plate 66; and after the flexible heat sink 9 leaves the receiving cavity 611, the flexible heat sink 9 is fixed on the second fixing surface 671 of the second support plate 67. That is, the opposite ends of the part of the flexible heat sink 9 in the rotating shaft assembly 6 are respectively fixed on the first fixing surface 661 of the first support plate 66 facing the shaft seat 61 and the second fixing surface 671 of the second support plate 67 facing the shaft seat 61. Among them, the flexible heat sink 9 can be fixed on the first fixing surface 661 of the first support plate 66 through a fastening structure (such as screws, bolts, etc.), and the flexible heat sink 9 can be fixed on the second fixing surface 671 of the second support plate 67 through a fastening structure (such as screws, bolts, etc.). Or, the flexible heat sink 9 can also be fixed on the first fixing surface 661 of the first support plate 66 by means of adhesion, buckling, etc. Or, the flexible heat sink 9 can also be fixed on the second fixing surface 671 of the second support plate 67 by means of adhesion, buckling, etc.

[0066] To avoid the middle section of the flexible heat sink 9 being in a freely bent and suspended state, shorten the length of the part of the flexible heat sink 9 that can be freely bent, so that the flexible heat sink 9 is divided into two sections with similar lengths in the length direction, making the displacement and bending deformation generated when the folding screen device 3 is folded or unfolded smaller, and the displacement and bending amount are easier to control. The middle section position of the flexible heat sink 9 can be positioned. Specifically, when the flexible heat sink 9 is received in the receiving cavity 611, the flexible heat sink 9 is fixed on the surface of the cross plate 612 facing the housing 60. The flexible heat sink 9 can be fixed on the surface of the cross plate 612 in the receiving cavity 611 through a fastening structure (such as screws, bolts, etc.), or the flexible heat sink 9 can also be fixed on the surface of the cross plate 612 in the receiving cavity 611 by means of adhesion, buckling, etc.

[0067] Before the flexible circuit board 8 enters the accommodation cavity 611 through the first gap 615, it can be connected to the electronic components fixed on the first frame 4, that is, connected to the second side 42 of the first frame 4 away from the flexible screen 7, positioned by the first positioning device, and can enter the accommodation cavity 611 through the gap between the first support plate 66 and the shaft seat 61, the gap between the first support plate 66 and the first bracket 62, and the first gap 615. After the flexible circuit board 8 leaves the accommodation cavity 611 through the second gap 616, it can be positioned by the second positioning device through the gap between the second support plate 67 and the shaft seat 61 and the gap between the second support plate 67 and the second bracket 63, and is connected to the electronic components fixed on the second frame 5, that is, connected to the second side 52 of the second frame 5 away from the flexible screen 7. The second side 42 of the first frame 4 is opposite to the first side 41 of the first frame 4. The second side 52 of the second frame 5 is opposite to the first side 51 of the second frame 5. Among them, the second side 42 of the first frame 4 and the second side 52 of the second frame 5 are used to install electronic components. It can be understood that the first side 41 of the first frame 4 and the first side 51 of the second frame 5 can also be used to install electronic components.

[0068] Combined Figure 5 、 Figure 6 、 Figure 8 And Figure 9 , during the folding process of the folding screen device 3, the door panel 65 moves towards the direction close to the shaft seat 61, and the ends of the first support plate 66 close to the door panel 65 and the ends of the second support plate 67 close to the door panel 65 move away from the door panel 65. The ends of the first support plate 66 away from the door panel 65 and the ends of the second support plate 67 away from the door panel 65 approach each other, and the door panel 65, the first support plate 66 and the second support plate 67 automatically avoid each other and jointly form an accommodation space for accommodating the flexible screen 7.

[0069] During the folding process of the folding screen device 3, the first support plate 66 and the second support plate 67 also drive the flexible heat sink 9 to move. The flexible heat sink 9 includes three parts according to its positional relationship with the first support plate 66 and the second support plate 67, namely the first part 91, the second part 92, and the third part 93. The first part 91 of the flexible heat sink 9 is located on the side of the first support plate 66 away from the second support plate 67. The second part 92 of the flexible heat sink 9 is located between the first support plate 66 and the second support plate 67. The third part 93 of the flexible heat sink 9 is located on the side of the second support plate 67 away from the first support plate 66. The first part 91 of the flexible heat sink 9 is fixed to the first support plate 66 and the first housing 4. The middle position of the second part 92 of the flexible heat sink 9 is fixed to the cross plate 612 between the first support plate 66 and the second support plate 67, and the other parts of the second part 92 of the flexible heat sink 9 are in an unfixed state between the first support plate 66 and the cross plate 612 and between the second support plate 67 and the cross plate 612. The third part 93 of the flexible heat sink 9 is fixed to the second support plate 67 and the second housing 5. When the first support plate 66 and the second support plate 67 drive the flexible heat sink 9 to move, the shape of the second part 92 of the flexible heat sink 9 changes, bending into a roughly heart shape and being located outside the first support plate 66, the door panel 65, and the second support plate 67.

[0070] During the folding process of the folding screen device 3, the first positioning device and the second positioning device also move simultaneously. The first positioning device and the second positioning device drive the flexible circuit board 8 to move. The flexible circuit board 8 includes three parts according to its positional relationship with the first positioning device and the second positioning device, namely the first part 83, the second part 84, and the third part 85. The first part 83 of the flexible circuit board 8 is located on the side of the first positioning device away from the second positioning device. The second part 84 of the flexible circuit board 8 is located between the first positioning device and the second positioning device. The third part 85 of the flexible circuit board 8 is located on the side of the second positioning device away from the first positioning device. The first part 83 of the flexible circuit board 8 is fixed to the first positioning device and the first housing 4. The second part 84 of the flexible circuit board 8 is in an unfixed state between the first positioning device and the second positioning device. The third part 85 of the flexible circuit board 8 is fixed to the second positioning device and the second housing 5. When the first positioning device and the second positioning device drive the flexible circuit board 8 to move, the shape of the second part 84 of the flexible circuit board 8 changes, bending into a roughly water droplet shape and being located outside the first support plate 66, the door panel 65, and the second support plate 67.

[0071] Combined Figure 3 , Figure 4 , Figure 8 and Figure 9, during the unfolding process of the folding screen device 3, the door panel 65 moves away from the shaft seat 61. When the folding screen device 3 is completely in the flattened state, the support surface 650 of the door panel 65 is flush with the first support surface 660 of the first support plate 66 and the second support surface 670 of the second support plate 67. In other words, when the folding screen device 3 is in the flattened state, the support surface 650 of the door panel 65, the first support surface 660 of the first support plate 66, and the second support surface 670 of the second support plate 67 are used to make the flexible screen 7 (such as Figure 6 shown) in a flattened state. When the user performs a touch operation, the door panel 65, the first support plate 66, and the second support plate 67 can provide a flat and strong support for the flexible screen 7, improving the user's operation experience and picture viewing experience.

[0072] During the unfolding process of the folding screen device 3, the first support plate 66 and the second support plate 67 also drive the flexible heat sink 9 to move. The second part 92 of the flexible heat sink 9 becomes substantially horizontal and fits with the first support plate 66, the cross plate 612, and the second support plate 67.

[0073] During the unfolding process of the folding screen device 3, the first positioning device and the second positioning device also move simultaneously. The first positioning device and the second positioning device drive the flexible circuit board 8 to move. The shape of the second part 84 of the flexible circuit board 8 changes and is in a freely bent state within the rotating shaft assembly 6.

[0074] In the present application, the flexible circuit board 8 and the flexible heat sink 9 can pass through the rotating shaft assembly 6 in the same area of the rotating shaft assembly 6, which can effectively utilize the space of the rotating shaft assembly 6, and the flexible heat sink 9 can transfer the heat of the first housing 4 to the second housing 5; by redundant arranging the flexible circuit board 8 and the flexible heat sink 9 in the rotating shaft assembly 6, the breakage of the flexible circuit board 8 and the flexible heat sink 9 and occupying too much space of the folding screen device 3 can be avoided; by fixing both ends of the flexible heat sink 9 on the first support plate 66 and the second support plate 67, the internal structure of the rotating shaft assembly 6 can be used to make the displacement and bending deformation of the flexible heat sink 9 smaller when the folding screen device 3 is folded or unfolded, and the displacement and bending amount are easy to control; by redundant arranging the flexible circuit board 8 and the flexible heat sink 9 in the accommodation cavity 611 formed by the shaft seat 61 and the housing 60, the internal structure of the rotating shaft assembly 6 can be used to realize the redundant arrangement of the flexible circuit board 8 and the flexible heat sink 9 in the rotating shaft assembly 6; by the shaft seat 61 forming a transverse plate 612 at the accommodation cavity 611, the flexible circuit board 8 and the flexible heat sink 9 are prevented from detaching from the accommodation cavity 611; by fixing the middle section of the flexible heat sink 9 on the transverse plate 612 of the shaft seat 61, the flexible heat sink 9 can be divided into two sections with approximately equal lengths in the length direction, making the displacement and bending deformation of the flexible heat sink 9 smaller when the folding screen device 3 is folded or unfolded, and the displacement and bending amount are easier to control; by positioning the flexible circuit board 8 on the first housing 4 and the second housing 5 through the first positioning device and the second positioning device, the displacement and bending deformation of the flexible circuit board 8 when the folding screen device 3 is folded or unfolded can be avoided, and the displacement and bending amount are easy to control.

[0075] Please refer to Figures 12 to 14 , Figure 12 which is a schematic cross-sectional view of the folding screen device according to the second embodiment of the present application in a flattened state, Figure 13 and which is a schematic cross-sectional view of the folding screen device according to the second embodiment of the present application in a folded state, Figure 14 and which is an exploded schematic view of the rotating shaft assembly of the folding screen device according to the second embodiment of the present application in a flattened state. The folding screen device of the second embodiment is similar to the folding screen device of the first embodiment, and the differences are as follows: the folding screen device 12 of the second embodiment further includes a buffer member 120, and the housing 121 of the second embodiment further includes a positioning member 1210. Specifically:

[0076] To position the flexible circuit board 122 at the middle section, the outer shell 121 further includes an inner shell surface 1211 and a positioning member 1210. The inner shell surface 1211 faces the outer shell surface 1212. The positioning member 1210 can be fixedly installed on the inner shell surface 1211 and is located within the installation cavity 1213. The positioning member 1210 can also be a structure protruding from the inner shell surface 1211 of the outer shell 121. The shaft seat 123 is located above the positioning member 1210 within the installation cavity 1213. The receiving groove 1231 is formed in the part of the shaft seat 123 above the positioning member 1210. The cross plate 1232 is located above the positioning member 1210 and is spaced apart from the positioning member 1210 for the flexible circuit board 122 and the flexible heat sink 124 to pass through. The positioning member 1210 and the cross plate 1232 jointly clamp the flexible circuit board 122 and the flexible heat sink 124, such that the flexible circuit board 122 and the flexible heat sink 124 are clamped between the positioning member 1210 and the cross plate 1232. At this time, the positioning member 1210 and the cross plate 1232 can jointly position the middle sections of the flexible circuit board 122 and the flexible heat sink 124, enabling the flexible circuit board 122 and the flexible heat sink 124 to be divided into two sections with approximately equal lengths in the length direction, such that the displacements and bending deformations generated when the flexible circuit board 122 and the flexible heat sink 124 are folded or unfolded in the folding screen device 12 are similar and smaller, and the displacement and bending amounts are easier to control.

[0077] To avoid damage to the flexible circuit board 122 by the positioning member 1210, the buffer member 120 is further provided between the positioning member 1210 and the cross plate 1232. The buffer member 120 is disposed on the positioning member 1210 and is spaced apart from the cross plate 1232. Among them, the buffer member 120 can be fixed to the positioning member 1210. The buffer member 120 is made of an elastic material, such as rubber, foam, etc. The buffer member 120 can avoid damage to the flexible circuit board 122 by the positioning member 1210 through elastic deformation. At the same time, the buffer member 120 can cause a small change in the connection position between the flexible circuit board 122 and the cross plate 1232, avoiding the risk of the flexible circuit board 122 being tightened and breaking.

[0078] In this application, the flexible circuit board 122 and the flexible heat sink 124 can be clamped between the positioning member 1210 and the transverse plate 1232 through the positioning member 1210, so that the positioning member 1210 and the transverse plate 1232 jointly form a positioning point at the middle section of the flexible circuit board 122, positioning the flexible circuit board 122 at the middle section position, which can divide the two sides of the flexible circuit board 122 in the length direction into two segments with similar lengths on both sides of the positioning member 1210, making the displacement and bending deformation generated when the folding screen device folds similar and smaller, and the displacement and bending amount are easier to control; the elastic deformation of the buffer member 120 can avoid damage to the flexible circuit board 122 by the positioning member 1210, and through the buffer member 120, there is a small change in the connection position between the flexible circuit board 122 and the transverse plate 1232, avoiding the risk of the flexible circuit board 122 being tightened and breaking.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A foldable screen device, characterized in that, The folding screen device includes a first frame body, a second frame body, a rotating shaft assembly, a flexible heat sink, and a flexible circuit board. The flexible heat sink and the flexible circuit board pass through the rotating shaft assembly; The rotating shaft assembly includes a housing, a shaft seat, a door panel, a first support plate, and a second support plate. The shaft seat is installed on the housing. A receiving groove is formed in the shaft seat and penetrates the shaft seat. The shaft seat and the housing together form a receiving cavity at the receiving groove. The flexible heat sink and the flexible circuit board are partially received in the receiving cavity. The door panel is installed on the shaft seat. The first support plate and the second support plate are distributed on both sides of the door panel. During the folding process of the folding screen, the end of the first support plate close to the door panel and the end of the second support plate close to the door panel move away from the door panel, and the end of the first support plate away from the door panel and the end of the second support plate away from the door panel approach each other; The first side of the first frame body and the first side of the second frame body are used to install a flexible screen, and the second side of the first frame body and the second side of the second frame body are used to install electronic components. The first side and the second side of the first frame body are opposite to each other, and the first side and the second side of the second frame body are opposite to each other; The opposite ends of the flexible heat sink are connected to the first frame body and the second frame body; the opposite ends of the part of the flexible heat sink in the rotating shaft assembly are respectively fixed to the first fixing surface of the first support plate facing the shaft seat and the second fixing surface of the second support plate facing the shaft seat; The opposite ends of the flexible circuit board are connected to the second sides of the first frame body and the second frame body.

2. The folding screen device according to claim 1, wherein: In the rotating shaft assembly, the flexible heat sink covers the flexible circuit board.

3. The folding screen device according to claim 1, wherein: The shaft seat further forms a cross plate at the receiving groove, and the cross plate is separated from the housing; The middle position of the flexible heat sink is fixed to the surface of the cross plate facing the housing.

4. The folding screen device according to claim 3, wherein: The cross plate extends from the first side wall of the shaft seat near the receiving groove to the second side wall opposite to the first side wall, and is separated from other side walls of the shaft seat near the receiving groove.

5. The folding screen device according to claim 4, wherein: The cross plate and other side walls of the shaft seat near the receiving groove form a first interval and a second interval. The flexible heat sink and the flexible circuit board enter the receiving cavity through the first interval and leave the receiving cavity through the second interval.

6. The folding screen device according to claim 3, wherein: The housing includes an inner housing surface and a positioning member. The positioning member is fixedly installed on the inner housing surface and is located in the receiving cavity. The cross plate is separated from the positioning member and jointly positions the middle positions of the flexible circuit board and the flexible heat sink.

7. The folding screen device according to claim 6, wherein: The folding screen device further includes a buffer member, which is disposed on the positioning member and spaced apart from the transverse plate. The buffer member is used to avoid damage to the flexible circuit board by the positioning member through elastic deformation.

8. The folding screen device according to claim 1, wherein: The first support plate and the second support plate are slidably connected to the shaft seat.

9. The folding screen device according to claim 1, wherein: The folding screen device further includes a first bracket, a second bracket, a first synchronous arm, a second synchronous arm and a cam structure; the first bracket is rotatably connected to the first support plate, the second bracket is rotatably connected to the second support plate, and the first bracket and the second bracket are rotatably connected to the shaft seat; the first synchronous arm is slidably and rotatably connected to the first bracket, the second synchronous arm is slidably and rotatably connected to the second bracket; the cam structure is disposed on the shaft seat and includes a concave-convex structure, and the first synchronous arm and the second synchronous arm are connected to the cam structure through the concave-convex structure to achieve damping of the rotation of the first bracket and the second bracket.

Images