Folding device, shell assembly and electronic equipment

Abstract

The invention provides a folding device, a shell assembly and electronic equipment. The folding device comprises a base assembly, a first rotating part, a first cam part, a first elastic part and a second cam part. The base assembly comprises a base and two rotating shafts arranged on the two opposite sides of the base, the two rotating shafts are sleeved with the two first rotating pieces respectively, and in the axial direction of the rotating shafts, a first cam is arranged on one side of each first rotating piece, and a second cam is arranged on the other side of each first rotating piece. The first cam piece is arranged on the two rotating shafts in a sleeving mode and provided with two third cams matched with the two first cams. At least one first elastic piece sleeves the rotating shaft, one end of the first elastic piece abuts against the first cam piece, and the other end of the first elastic piece is fixed to the rotating shaft. The second cam piece is arranged on the two rotating shafts in a sleeving mode and provided with two fourth cams matched with the two second cams. The torsion of the folding device can be improved, and when the size of the folding device is reduced, the folding device can still meet the opening and closing hand feeling and hovering requirements of the whole machine.

Description

Technical Field

[0001] The present application belongs to the technical field of folding devices, and in particular relates to a folding device, a housing assembly and an electronic device. Background Art

[0002] Competition in the mobile terminal industry is increasingly trending towards large screens and ultra-thin devices, but large screens make the entire device too large and inconvenient to carry. Foldable electronic devices can solve the above problem by changing the size of the electronic device due to their folding function, and are now popular with a large number of users. Electronic devices rely on folding devices to achieve the folding function. Currently, when the size of the folding device is reduced, the torque of the folding device is insufficient and cannot meet the requirements of the opening and closing feel and hovering of the entire device. Summary of the invention

[0003] In view of this, the first aspect of the present application provides a folding device, comprising:

[0004] A base assembly, comprising a base and two rotating shafts arranged on opposite sides of the base;

[0005] Two first rotating members, each sleeved with one of the rotating shafts and capable of rotating relative to the base, wherein along the axial direction of the rotating shaft, one side of each of the first rotating members is provided with a first cam, and the other side is provided with a second cam;

[0006] A first cam member, sleeved on the two rotating shafts, wherein one side of the first cam member close to the two first rotating members is provided with two third cams matched with the two first cams;

[0007] at least one first elastic member, sleeved on the rotating shaft, one end of the first elastic member abuts against a side of the first cam member away from the first rotating member, and the other end of the first elastic member is fixed to the rotating shaft; and

[0008] The second cam member is sleeved on the two rotating shafts. The second cam member and the first cam member are arranged on opposite sides of the first rotating member. Two fourth cams matching with the two second cams are arranged on one side of the second cam member close to the two first rotating members.

[0009] The folding device provided in the first aspect of the present application is provided by respectively arranging a first cam and a second cam on opposite sides of a first rotating member, and arranging a first cam member having a third cam at the first cam, and arranging a second cam member having a fourth cam at the second cam. When the first rotating member rotates, the first cam and the second cam cooperate with each other to compress the first elastic member, and the first elastic member in a compressed state provides an axial force for the first cam and the second cam. At the same time, the third cam and the fourth cam also cooperate with each other, so that the axial force exerted on the first cam and the second cam can be transmitted to the third cam and the fourth cam, so that the third cam and the fourth cam are also subjected to the same axial force, thereby causing the first rotating member to be subjected to double the axial force.

[0010] In summary, the first rotating member of this embodiment can be subjected to double axial force, thereby increasing the torque of the folding device. When the size of the folding device is reduced, it can still meet the requirements of the opening and closing feel and hovering of the whole machine, achieving the purpose of miniaturization.

[0011] A second aspect of the present application provides a shell assembly, which includes a first shell, a second shell, and a folding device as provided in the first aspect of the present application, wherein the folding device is connected between the first shell and the second shell.

[0012] The shell assembly provided in the second aspect of the present application can increase the torque of the shell assembly by adopting the folding device provided in the first aspect of the present application. When the size of the shell assembly becomes smaller, it can still meet the opening and closing feel and hovering requirements of the whole machine, thereby achieving the purpose of miniaturization.

[0013] A third aspect of the present application provides an electronic device, comprising a flexible screen and a shell assembly as provided in the second aspect of the present application, wherein the flexible screen is arranged on the same side of the first shell, the second shell, and the folding device.

[0014] The electronic device provided in the third aspect of the present application can improve the torque of the electronic device by adopting the shell assembly provided in the second aspect of the present application. When the size of the electronic device becomes smaller, it can still meet the opening and closing feel and hovering requirements of the whole machine, thereby achieving the purpose of miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the implementation modes of the present application will be described below.

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the folding device in one embodiment of the present application.

[0017] Figure 2 for Figure 1 An exploded view of the folding device is shown.

[0018] Figure 3 for Figure 1 A top view of the folding device is shown.

[0019] Figure 4 This is a schematic diagram of the force on the cam surface during the unfolding process of the folding device.

[0020] Figure 5 It is a schematic diagram of the force on the cam surface during the folding process of the folding device.

[0021] Figure 6 It is an exploded side view of a base assembly, a second limiting member, and a second cam member in one embodiment of the present application.

[0022] Figure 7 This is a top view of a folding device in another embodiment of the present application.

[0023] Figure 8 It is an exploded schematic diagram of a base assembly, a second elastic member, and a first rotating member in one embodiment of the present application.

[0024] Fig. 9 This is a top view of a folding device in another embodiment of the present application.

[0025] Fig.10 This is a schematic diagram of the three-dimensional structure of a folding device in another embodiment of the present application when it is in an unfolded state.

[0026] Fig.11 for Fig.10 An exploded view of the folding device is shown.

[0027] Fig.12 for Fig.10 A front view of the folding device is shown.

[0028] Fig.13 An exploded view of a half-shaft assembly in one embodiment of the present application.

[0029] Fig.14 This is a schematic diagram of the three-dimensional structure of a folding device in a folded state in yet another embodiment of the present application.

[0030] Fig.15 for Fig.14 A front view of the folding device is shown.

[0031] Fig.16 It is a schematic diagram of the coordination of the base, the first rotating member, the second rotating member, and the connecting member in one embodiment of the present application.

[0032] Fig.17 It is a schematic diagram of an exploded view of a second rotating member and a connecting member in one embodiment of the present application.

[0033] Fig.18It is an exploded schematic diagram of the base, the second rotating member, and the connecting member in one embodiment of the present application.

[0034] Fig.19 It is a schematic diagram of an exploded view of a base, a second rotating member, and a part of a supporting member in one embodiment of the present application.

[0035] Fig. 20 It is a cross-sectional schematic diagram of the base, the second rotating member, and the supporting member when the folding device is in an unfolded state in one embodiment of the present application.

[0036] Fig.21 It is a cross-sectional schematic diagram of the base, the second rotating member, and the supporting member when the folding device is in a folded state in one embodiment of the present application.

[0037] Fig. 22 It is a schematic diagram of the three-dimensional structure of the shell assembly in an embodiment of the present application when it is in an unfolded state.

[0038] Fig.23 It is a schematic diagram of the three-dimensional structure of the shell assembly in one embodiment of the present application when it is in a folded state.

[0039] Fig.24 It is a schematic diagram of the three-dimensional structure of an electronic device in an unfolded state according to one embodiment of the present application.

[0040] Fig.25 It is a schematic diagram of the three-dimensional structure of an electronic device in a folded state according to one embodiment of the present application.

[0041] Fig.26 This is a schematic diagram of an electronic device in another embodiment of the present application.

[0042] Description of labels:

[0043] Folding device-1, screen space-1a, half-axis assembly-1b, housing assembly-2, electronic device-3, base assembly-10', base-10, top surface-101, bottom surface-102, side surface-103, first protrusion-104, first part-105, sixth cam-1050, second part-106, eighth cam-1060, third part-107, connecting part-108, rotating shaft-11, annular protrusion-111, second protrusion 112, third rotation axis C3, fourth rotation axis C4, first cam member 21, shaft portion 210, third cam 213, second cam member 22, fourth cam 224, first elastic member 23, first stop member 24, second stop member 25, second elastic member 26, first rotating member 30, receiving groove 300, first cam 301, second cam 302, first sub-rotating member 37, first sub-receiving Slot-370, second sub-rotating member-38, second sub-accommodating slot-380, second rotating member-40, fifth cam-401, seventh cam-402, sliding block-42, first rolling shaft-43, connecting member-50, back-500, sliding slot-52, supporting member-60, bearing member-60', supporting part-61, supporting surface-610, rolling part-62, first rolling slot-620, third limiting end-621, fourth limiting end-62 2, first connecting part -623, second connecting part -624, decorative part -70, tooth -80, first synchronization gear -81, second synchronization gear -82, first shell -91, first main board -911, first battery -912, first small board -913, second shell -92, second main board -921, second battery -922, second small board -923, flexible screen -93, bending area -930, non-bending area -931, flexible circuit board -94. DETAILED DESCRIPTION

[0044] The following are preferred implementations of the present application. It should be noted that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications are also considered to be within the scope of protection of the present application.

[0045] With the market demand for the "display area" of terminal products such as mobile phones and tablets, the competition in the mobile terminal industry is increasingly tending towards large screens and ultra-thinness. However, large screens make the size of the whole machine too large and inconvenient to carry. The smartphone industry is ushering in an experience revolution brought about by form innovation. The display form of mobile phone products has developed from the initial hard screen to flexible screen, from small screen to large screen, from static mechanism to motion mechanism. Recently, major mobile phone manufacturers have been developing folding screens, striving to expand the form and display boundaries of mobile phone products, so that they have the functions of mobile phones, tablets and even computers. As an electronic device with a new display form, the foldable display terminal has a foldable flexible screen because of its folding function. It can be unfolded or closed. And it has a larger display area in the unfolded state and a smaller overall size in the folded state, which can solve the above problems. It is now loved by the majority of users.

[0046] The foldable display terminal relies on the folding device inside to achieve the folding function. Currently, there are two mainstream internal folding methods for flexible screens: U-shaped and water drop-shaped. After the U-shaped is combined, the whole machine is thicker and uneven, but the folding device is simple and the reliability of the whole machine is high. After the water drop shape is folded, the whole machine is thinner and flat, but the folding device is complex and the cost is high. At present, the water drop hinge generally adopts a three-plate water drop, which is formed by the middle plate and the inclined plate. With the development of folding products, higher and higher requirements are put forward for the lightness and long battery life of the products. On this basis, the miniaturization of the folding device is an important development direction, so as to leave more space for the stacking of product batteries, etc. At the same time, it is necessary to ensure that the folding device maintains sufficient torque to achieve the opening and closing feel and hovering effect. However, when the size of the existing folding device is reduced, its torque is insufficient, which is not enough to meet the opening and closing feel and hovering effect of the whole machine.

[0047] In view of this, in order to solve the above problems, the present application provides a folding device. Please refer to Figure 1-Figure 5 , Figure 1 It is a schematic diagram of the three-dimensional structure of the folding device in one embodiment of the present application. Figure 2 for Figure 1 An exploded view of the folding device is shown. Figure 3 for Figure 1 A top view of the folding device is shown. Figure 4 This is a schematic diagram of the force on the cam surface during the unfolding process of the folding device. Figure 5The folding device 1 provided in this embodiment includes a base assembly 10', two first rotating members 30, a first cam member 21, a first elastic member 23, and a second cam member 22. The base assembly 10' includes a base 10, and two rotating shafts 11 arranged on opposite sides of the base 10. The two first rotating members 30 are respectively sleeved with one of the rotating shafts 11 and can rotate relative to the base 10. Along the axial direction of the rotating shaft 11, a first cam 301 is provided on one side of each of the first rotating members 30, and a second cam 302 is provided on the other side. The first cam member 21 is sleeved on the two rotating shafts 11, and two third cams 213 cooperating with the two first cams 301 are provided on one side of the first cam member 21 close to the two first rotating members 30. At least one first elastic member 23 is sleeved on the rotating shaft 11, and one end of the first elastic member 23 abuts against the side of the first cam member 21 away from the first rotating member 30, and the other end is fixed to the rotating shaft 11. The second cam member 22 is sleeved on the two rotating shafts 11 , and the second cam member 22 and the first cam member 21 are arranged on opposite sides of the first rotating member 30 , and two fourth cams 224 cooperating with the two second cams 302 are provided on one side of the second cam member 22 close to the two first rotating members 30 .

[0048] The folding device 1 can also be called a hinge, which is mainly used in electronic products such as mobile phones, tablets, computers, etc., and can also be used in other non-electronic products that require a torque shaft 11, such as doors, windows, etc. The folding device 1 of this embodiment mainly includes a base assembly 10', a first rotating member 30, a first cam member 21, a first elastic member 23, and a second cam member 22, which means that this embodiment can solve the above-mentioned technical problems by only using the base assembly 10', the first rotating member 30, the first cam member 21, the first elastic member 23, and the second cam member 22. However, the folding device 1 may also include other components, such as a connecting member 50, a supporting member 60, a second rotating member 40, a second elastic member 26, a synchronization mechanism, etc. Next, this embodiment will introduce the base assembly 10', the first rotating member 30, the first cam member 21, the first elastic member 23, and the second cam member 22 in detail.

[0049] The base assembly 10' includes a base 10 and two rotating shafts 11. The base 10 is the basic component of the folding device 1, and is mainly used to provide a foundation for the installation and fixing of other components, that is, many components of the folding device 1 can be installed on the base 10. And when the folding device 1 moves, the base 10 itself is fixed, and it is mainly the other components of the folding device 1 that perform various movements. This embodiment does not limit the parameters such as the shape, structure, and material of the base 10, as long as it can provide an assembly foundation for other components.

[0050] Optionally, the base 10 has a top surface 101, a bottom surface 102, and a side surface 103 that is bent and connected between the top surface 101 and the bottom surface 102. When the folding device 1 is subsequently applied to the electronic device 3, the top surface 101 can be close to the flexible screen 93 of the electronic device 3, and the bottom surface 102 is far away from the flexible screen 93, and the bottom surface 102 can also cooperate with the decorative member 70. In other words, the upper surface of the base 10 is the top surface 101, and the lower surface is the bottom surface 102. Further optionally, the top surface 101 and the bottom surface 102 are both planes, which is convenient for subsequent cooperation with other components. The side surface 103 is a convexly arranged arc surface, which improves the appearance of the base 10 and is convenient for cooperation with the decorative member 70.

[0051] The two rotating shafts 11 can also be used to install various components to achieve various connection forms such as rotation and sliding. Optionally, the two rotating shafts 11 are arranged at intervals on opposite sides of the base 10 along the extension direction perpendicular to the base 10, and the axial directions of the two rotating shafts 11 are the same, so that the same components can be arranged on the left and right sides of the base 10 later to achieve the same motion trajectory on the left and right sides of the base 10. Further optionally, the two rotating shafts 11 are detachably arranged on the base 10 so that other components can be passed through the rotating shafts 11.

[0052] The first rotating member 30 mainly plays a rotating role in the folding device 1, so that the folding device 1 has the ability to fold and unfold, and the movement of other components is driven and limited by the rotation of the first rotating member 30, so that other components move according to a predetermined trajectory. One end of the first rotating member 30 is rotatably connected to the base 10 so that the first rotating member 30 can rotate relative to the base 10. For example, two first rotating members 30 are respectively sleeved with one of the rotating shafts 11 and can rotate relative to the base 10. Specifically, one rotating member is sleeved on one rotating shaft 11, and the other rotating member is sleeved on another rotating shaft 11. The other end of the first rotating member 30 can be subsequently connected to other components such as a connecting member 50. This embodiment does not limit the parameters such as the shape, structure, and material of the first rotating member 30, as long as it can be rotatably connected to the base 10.

[0053] The rotation of the first rotating member 30 enables the folding device 1 to have a variety of different states, such as an unfolded state and a folded state, wherein the unfolded state can be understood as the state when the first rotating member 30 is completely flattened, at which time the other end of the first rotating member 30 is set corresponding to the side surface 103 of the base 10, so that the upper surface of the subsequent support member 60 can be set horizontally, thereby fully unfolding the flexible screen 93. The folded state can be understood as the state when the first rotating member 30 is completely folded, at which time the other end of the first rotating member 30 is set corresponding to the top surface 101 of the base 10, so that the opposite ends of the subsequent flexible screen 93 can be close to each other, and the flexible screen 93 reaches a completely folded state. And the process of the folding device 1 from the unfolded state to the folded state can be understood as the folding process of the folding device 1, and the process of the folding device 1 from the folded state to the unfolded state can be understood as the unfolding process of the folding device 1.

[0054] In addition, along the axial direction of the rotating shaft 11 (such as Figure 2 (as shown in D), cams are provided on opposite sides of each first rotating member 30: for example, a first cam 301 is provided on one side of the first rotating member 30, and a second cam 302 is provided on the other side. The cam is a structure whose end face is a cam surface, and the cam surface is arranged in sequence by wave crests and wave troughs, and is arranged around the circumference of the cam. In other words, the cam surface is an annular wave surface. The first cam 301, the second cam 302 in this embodiment, and the third cam 213, the fourth cam 224, the fifth cam 401, the sixth cam 1050, the seventh cam 402, and the eighth cam 1060 mentioned below in this application can be understood in the same way, and will not be repeated in this application.

[0055] The first cam member 21 is a component with a cam on the surface, and the first cam member 21 can be sleeved on two rotating shafts 11 at the same time, so that the first cam member 21 can only slide along the axial direction of the rotating shaft 11 but cannot rotate, and at the same time, the synchronization effect of the two first rotating members 30 on both sides of the base 10 can be achieved. In addition, the first cam member 21 is provided with two third cams 213, and the two third cams 213 correspond to one first cam 301 respectively, that is, one third cam 213 is arranged to cooperate with one first cam 301 in a corresponding manner, and the other third cam 213 is arranged to cooperate with the other first cam 301 in a corresponding manner.

[0056] The first elastic member 23 is a component with an elastic member, such as an elastic structure such as a spring or foam. The first elastic member 23 is sleeved on the rotating shaft 11, and the first elastic member 23 is located on the side of the first cam member 21 away from the first rotating member 30. One end of the first elastic member 23 abuts against the first cam member 21, and the other end is fixed to the rotating shaft 11. When the first rotating member 30 rotates, the first cam 301 rotates synchronously, and the first cam 301 cooperates with the third cam 213 to make the third cam 213 slide along the axial direction of the rotating shaft 11. When the third cam 213 slides in a direction away from the first rotating member 30, one end of the first elastic member 23 slides synchronously in a direction away from the first rotating member 30. Since the other end of the first elastic member 23 is fixed to the rotating shaft 11 and remains stationary, the first elastic member 23 is compressed. The first elastic member 23 in a compressed state gives an axial force to the first cam member 21, so that the third cam 213 of the first cam member 21 presses the first cam 301 of the first rotating member 30, thereby increasing the torque of the first rotating member 30.

[0057] The second cam member 22 is also sleeved on the two rotating shafts 11, and the second cam member 22 and the first cam member 21 are arranged on opposite sides of the first rotating member 30, so that the second cam member 22 can only slide along the axial direction of the rotating shaft 11 but cannot rotate, and the synchronization effect of the two first rotating members 30 on both sides of the base 10 can be achieved. In addition, the second cam member 22 is provided with two fourth cams 224, and the two fourth cams 224 correspond to one second cam 302 respectively, that is, one fourth cam 224 is arranged to cooperate with one second cam 302, and the other fourth cam 224 is arranged to cooperate with another second cam 302. Optionally, the second cam member 22 also slides along the axial direction of the rotating shaft 11, or the second cam member 22 is fixed to the rotating shaft 11.

[0058] When the first rotating member 30 rotates, the second cam 302 also rotates synchronously. The second cam 302 cooperates with the fourth cam 224 to further compress the first elastic member 23, so that the second cam member 22 and the first rotating member 30 can be subjected to the same axial force. The second cam 302 of the first rotating member 30 will press the fourth cam 224 of the second cam member 22, so that the torque of the first rotating member 30 is doubled, thereby further increasing the torque of the first rotating member 30.

[0059] In addition, this embodiment also provides a calculation form for the torque of the cam mating surface: the cam surface mating is simplified to the mating of two inclined surfaces, and the development process is as follows: Figure 4 As shown, Fx is the radial force, Fs is the axial force provided by the spring, etc., and Fr 12 is the force (including friction) exerted by part 1 (moving cam) on part 2 (static cam), α is the inclination angle of the cam slope, is the friction angle of the cam mating surface. The moving cams are the first cam 301 and the second cam 302 of the first rotating member 30, and the static cams are the third cam 213 of the first cam member 21 and even the fourth cam 224 of the subsequent second cam member 22. According to the principle of force balance and three-force convergence, draw a force triangle as shown in Figure 4 As shown on the right, the radial force Fx is calculated as follows, where u is the friction coefficient:

[0060]

[0061] The force during folding is Figure 5 As shown, the radial force Fx is calculated as follows with reference to the above content: This formula can be expanded with reference to the above model.

[0062] Therefore, the final torque provided is: M = F X × * , where r * is the equivalent radius of the cam.

[0063] In summary, in this embodiment, cams are arranged on opposite sides of the first rotating member 30, which cooperate with the cams on both sides respectively. When the first rotating member 30 rotates, it cooperates with the first cam member 21 and the second cam member 22 on the left and right sides to compress the first elastic member 23, and the axial force of the first elastic member 23 located on the first cam member 21 can be transmitted to the second cam member 22 on the other side. Finally, the first rotating member 30 is subjected to double axial force, which increases the torque of the folding device 1. When the folding device 1 becomes thinner and narrower, that is, the size becomes smaller, it can still meet the opening and closing feel and hovering requirements of the whole machine, and achieve the purpose of miniaturization. In other words, this embodiment can effectively solve the problem of insufficient torque during the miniaturization of the folding device 1.

[0064] Please refer again Figure 2-Figure 3 In this embodiment, the folding device 1 includes a first limiting member 24 and at least three first elastic members 23. A rotating shaft portion 210 is provided on the side of the first cam member 21 away from the first rotating member 30. The first limiting member 24 is clamped on the rotating shaft 11. One first elastic member 23 is sleeved on one rotating shaft 11, another first elastic member 23 is sleeved on another rotating shaft 11, and the remaining first elastic members 23 are sleeved on the rotating shaft portion 210. One end of at least three first elastic members 23 abuts against the first cam member 21, and the other end abuts against the first limiting member 24.

[0065] The first position-limiting member 24 is sleeved on the rotating shaft 11 and is clamped on the rotating shaft 11. For example, an annular protrusion 111 is provided at the end of the rotating shaft 11. After the first position-limiting member 24 is sleeved, the annular protrusion 111 can be used to limit the first position-limiting member 24. At the same time, a rotating shaft portion 210 is convexly provided on the side of the first cam member 21 away from the first rotating member 30. The rotating shaft portion 210 can also be used to sleeve the first elastic member 23. This embodiment may include at least three first elastic members 23, two first elastic members 23 are sleeved on two rotating shafts 11 respectively, and the remaining first elastic members 23 are sleeved on the rotating shaft portion 210. For example, when there is one rotating shaft portion 210, one first elastic member 23 can be sleeved, and when there are multiple rotating shaft portions 210, multiple first elastic members 23 can be sleeved. This embodiment is only schematically described with three first elastic members 23.

[0066] One end of the three first elastic members 23 abuts against the first cam member 21 and is compressed as the first cam member 21 moves. The other end abuts against the first stop member 24. Since the first stop member 24 is clamped on the rotating shaft 11, the other end of the first elastic member 23 can remain fixed. In other words, the first elastic member 23 is indirectly fixed to the rotating shaft 11 through the first stop member 24. Of course, in other embodiments, the first elastic member 23 can also be directly fixed to the rotating shaft 11 by other means (such as bonding, snap connection, etc.).

[0067] When the folding device 1 includes three first elastic members 23, the first rotating member 30 rotates so that the three first elastic members 23 are compressed. Assuming that each first elastic member 23 has the same specifications and the axial force provided by a single first elastic member 23 is F, the total axial force provided by the three parallel first elastic members 23 is 3F. The axial forces of the first cam member 21 and the second cam member 22 on the left and right sides are both 3F. Each cam member includes two cams, so the axial force of each cam is 1.5F. Therefore, the total axial force is 6F, which doubles the torque of the folding device 1.

[0068] Please refer again Figure 2 and Figure 6 , Figure 6 1 is an exploded side view of a base assembly, a second stopper, and a second cam member in one embodiment of the present application. In this embodiment, the folding device 1 further comprises a second stopper 25 sleeved on the two rotating shafts 11, the second stopper 25 is arranged on the side of the first rotating member 30 away from the second cam member 22, the base of the base assembly 10' on the side of the second cam member 22 close to the first rotating member 30 is provided with a first stopper, and the rotating shaft 11 on the side of the second stopper 25 away from the second cam member 22 is provided with a second stopper.

[0069] When the second cam member 22 can slide relative to the rotating shaft 11, a second stopper 25 sleeved on the two rotating shafts 11 can be provided. The second stopper 25 is provided on the side of the first rotating member 30 away from the second cam member 22, that is, the second stopper 25 is provided on the back side 500 of the second cam member 22. The base assembly 10' of the second cam member 22 near the first rotating member 30 is provided with a first stopper, for example, a first protrusion 104 can be provided on the base 10 on the front side of the second cam member 22, and the first protrusion 104 is the first stopper, and the first protrusion 104 can be used to prevent the second cam member 22 from excessively sliding in the direction close to the first rotating member 30. At the same time, a second stopper can be provided on the rotating shaft 11 on the side of the second stopper 25 away from the second cam member 22. For example, a second protrusion 112 can be set on the rotating shaft 11 on the back side 500 of the second limiting member 25. The second protrusion 112 is a second limiting portion. The second protrusion 112 can prevent the second limiting member 25 and the second cam member 22 from excessively sliding in a direction away from the first rotating member 30. At this time, the second limiting member 25 can protect the second cam member 22.

[0070] In summary, in this embodiment, the limiting parts are provided on the opposite sides of the second cam member 22 to effectively control the sliding track of the second cam member 22 to prevent it from sliding excessively, thereby avoiding interference or separation with the first rotating member 30.

[0071] Please refer to Figure 7 , Figure 7 In this embodiment, the folding device 1 further comprises at least one second elastic member 26 , which is sleeved on the rotating shaft 11 , and one end of the second elastic member 26 abuts against the second cam member 22 , and the other end abuts against the base 10 .

[0072] The second elastic member 26 and the first elastic member 23 are disposed at opposite ends of the first rotating member 30. The first elastic member 23 is used to abut against the first cam member 21, and the second elastic member 26 is used to abut against the second cam member 22, and the other end can be abutted against the base 10 to remain fixed. This embodiment is schematically described with only two second elastic members 26, for example, one second elastic member 26 is sleeved on one rotating shaft 11, and the other second elastic member 26 is sleeved on the other rotating shaft 11.

[0073] When the number of the first elastic members 23 is three, and the specifications of the first elastic members 23 and the second elastic members 26 are the same and the axial force provided by a single elastic member is F, the total axial force provided by the three parallel first elastic members 23 on the right side is 3F, and the axial force distributed to the cam members on both sides is 3F, and the axial force of each cam in each cam member is 1.5F. Figure 7The axial force of the upper and lower third cams 213 of the first cam member 21 on the right side is 1.5F, pointing to the left. The three first cam members 21 on the right side provide axial force of 1.5F for the upper and lower fourth cams 224 of the second cam 302, pointing to the right.

[0074] Furthermore, the two parallel second elastic members 26 on the left provide a total axial force of 2F, that is, the axial force on the second cam member 22 is 2F, and the axial forces on the upper and lower fourth cams 224 of the second cam member 22 are 1F each. In other words, the two second elastic members 26 on the left provide an axial force of F each for the upper and lower mating surfaces of the second cam member 22, pointing to the right, and the axial forces on the upper and lower mating surfaces of the second cam member 22 are F+1.5F=2.5F, pointing to the right. Therefore, the final total axial force is (2.5F+1.5F)*2=8F, which further increases the torque of the folding device 1.

[0075] Please refer to Figure 7-Figure 8 , Figure 8 1 is an exploded schematic diagram of a base assembly, a second elastic member, and a first rotating member in an embodiment of the present application. In this embodiment, the base 10 includes a first portion 105, a second portion 106, a third portion 107, and a connecting portion 108. The first portion 105 is used to set the second rotating member 40. The second portion 106 is connected to the first portion 105. The third portion 107 is farther away from the first portion 105 than the second portion 106. One end of the rotating shaft 11 is set in the second portion 106, and the other end passes through the third portion 107. The other end of the second elastic member 26 abuts against the second portion 106. The connecting portion 108 is connected between the second portion 106 and the third portion 107 and is located between the two rotating shafts 11. The first rotating member 30 has a receiving groove 300. The end of the third portion 107 is set in the receiving groove 300, and along the axial direction of the rotating shaft 11, the groove wall of the receiving groove 300 abuts against the third portion 107.

[0076] The base 10 is not a flat structure, and it may include multiple parts, and each part has its own function. For example, the first part 105 is used to subsequently set the second rotating member 40, and the second part 106 is set on the first part 105, and can cooperate with the first part 105 to jointly set the second rotating member 40. Optionally, the second part 106 is fixedly connected to the first part 105, or the second part 106 can be slidably connected to the first part 105, and one end of the rotating shaft 11 can be set on the second part 106. The third part 107 is farther away from the first part 105 than the second part 106, and the other end of the rotating shaft 11 can pass through the third part 107. The connecting part 108 is arranged between the second part 106 and the third part 107 and connects the second part 106 and the third part 107, and the connecting part 108 is located between the two rotating shafts 11. In other words, the second portion 106 and the third portion 107 are connected by a narrower and thinner connecting portion 108 , which facilitates the arrangement of other components such as the rotating shaft 11 and the second elastic member 26 , and is beneficial for reducing the size of the folding device 1 .

[0077] Based on the base 10 of the above structure, a receiving groove 300 is provided on the first rotating member 30, and the end of the third portion 107 along the axial direction of the vertical rotating shaft 11 is arranged in the receiving groove 300. In other words, the end of the third portion 107 is located in the first rotating member 30, so that it is convenient to arrange the first cam 301 and the second cam 302 at both ends of the first rotating member 30. That is, the first cam 301 and the second cam 302 are arranged at opposite ends of the first rotating member 30. In addition, the receiving groove 300 can also be used to cooperate with the third portion 107 to limit the left and right sliding of the first rotating member 30.

[0078] In addition, in the axial direction along the rotating shaft 11, the groove wall of the receiving groove 300 can be made to abut against the third part 107. From the above content, it can be known that when the number of the first elastic members 23 is 3 and the number of the second elastic members 26 is 2, the axial force of the third cam 213 is 1.5F, pointing to the right, and the axial force of the fourth cam 224 is 2.5, pointing to the left. As a result, the axial force 2.5F on the left side of the first rotating member 30 is greater than the axial force 1.5F on the right side. In the process of the movement of the first rotating member 30, the groove wall of the receiving groove 300 and the left side surface of the third part 107 of the base 10 are zero-matched to form a friction surface, and the axial force of the friction surface is 2.5F-1.5F=F.

[0079] In summary, in this embodiment, by providing a through-axis feature on the base 10 and arranging it in the opening area of ​​the first rotating member 30, the folding device 1 can not only provide torque by the cam surface, but also further increase the torque through the friction surface.

[0080] Please refer to Figure 7-Figure 9 , Fig. 9It is a top view of a folding device in another embodiment of the present application. In this embodiment, the second part 106 is slidably connected to the first part 105, and the folding device 1 further includes a second rotating member 40 that is rotatably connected to the first part 105. Along the axial direction of the rotating shaft 11, one end of the second rotating member 40 abuts against the first part 105, and the other end abuts against the second part 106. The folding device 1 satisfies at least one of the following conditions: a fifth cam 401 is provided on one side of the second rotating member 40, and a sixth cam 1050 that matches the fifth cam 401 is provided on the first part 105. And / or, a seventh cam 402 is provided on the other side of the second rotating member 40, and the second part 106 is provided with an eighth cam 1060 that matches the seventh cam 402.

[0081] In this embodiment, the second part 106 can slide relative to the first part 105, and the second rotating member 40 is rotatably connected to the first part 105, that is, the second rotating member 40 can rotate relative to the first part 105. Along the axial direction of the rotating shaft 11, one end of the second rotating member 40 abuts against the first part 105, and the other end abuts against the second part 106. On the basis of setting the second elastic member 26, the second elastic member 26 can transmit the axial force to the matching surfaces on both sides of the second rotating member 40 through the sliding second part 106. When the matching surfaces on both sides of the second rotating member 40 are planes (which can be regarded as a cam matching angle of 0 degrees) rather than cam surfaces, the matching surfaces on both sides are simple friction surfaces, and the axial force of each friction surface is F, which can further increase the torque of the folding device 1.

[0082] In addition, the present embodiment can also realize cam coordination by using the second rotating member 40, the first part 105, and the second part 106. For example, in one embodiment, the side of the second rotating member 40 close to the first part 105 is provided with a fifth cam 401, and the first part 105 is provided with a sixth cam 1050. When the second rotating member 40 rotates, the fifth cam 401 and the sixth cam 1050 cooperate with each other to slide the second rotating member 40, drive the second part 106 to slide relative to the first part 105, and further compress the second elastic member 26, increase the axial force given to each component by the second elastic member 26, and further improve the torsion of the folding device 1.

[0083] In another embodiment, a seventh cam 402 may be provided on a side of the second rotating member 40 close to the second portion 106, and an eighth cam 1060 may be provided on the second portion 106. When the second rotating member 40 rotates, the seventh cam 402 and the eighth cam 1060 cooperate with each other to slide the second portion 106 relative to the first portion 105, thereby further compressing the second elastic member 26, increasing the axial force applied by the second elastic member 26 to each component, and further improving the torsion of the folding device 1.

[0084] It is worth noting that this embodiment may satisfy only one embodiment, only another embodiment, or both embodiments at the same time. This embodiment is only schematically illustrated by simultaneously setting the fifth cam 401, the sixth cam 1050, the seventh cam 402, and the eighth cam 1060.

[0085] Please refer again Figure 8-Figure 9 In this embodiment, the first rotating member 30 includes a first sub-rotating member 37 and a second sub-rotating member 38 which are connected in a split manner. The first sub-rotating member 37 and the second sub-rotating member 38 are arranged on opposite sides of the third portion 107. The first sub-rotating member 37 has a first sub-receiving groove 370, and the second sub-rotating member 38 has a second sub-receiving groove 380. The first sub-receiving groove 370 and the second sub-receiving groove 380 are jointly arranged to form the receiving groove 300. Along the axial direction of the rotating shaft 11, the groove wall of the first sub-receiving groove 370 abuts against the surface of one side of the third portion 107, and the groove wall of the second sub-receiving groove 380 abuts against the surface of the other side of the third portion 107.

[0086] The first rotating member 30 is not an integrated structure, but is formed by two sub-rotating members: a first sub-rotating member 37 and a second sub-rotating member 38 connected together. Specifically, the first rotating member 30 and the second rotating member 40 can be plugged together through a pin. The first sub-rotating member 37 is provided with a first cam 301, and the second sub-rotating member 38 is provided with a second cam 302. In addition, the first sub-rotating member 37 has a first sub-receiving groove 370, and the second sub-rotating member 38 has a second sub-receiving groove 380. The above-mentioned receiving groove 300 can be composed of the first sub-receiving groove 370 and the second sub-receiving groove 380. Therefore, when the end of the third part 107 is set in the receiving groove 300, the groove wall of the first sub-receiving groove 370 abuts against the surface of one side of the third part 107, and the groove wall of the second sub-receiving groove 380 abuts against the surface of the other side of the third part 107.

[0087] When the number of the first sub-elastic members is 3 and the number of the second sub-elastic members is 2, the axial force of the upper and lower third cams 213 in the first cam member 21 is 1.5F, pointing to the left. The axial force of the upper and lower fourth cams 224 in the second cam member 22 is F+1.5F=2.5F, pointing to the right.

[0088] Since the first rotating member 30 is divided into two sub-rotating members, the groove walls of the sub-accommodating grooves 300 of the two sub-rotating members abut against the opposite sides of the third portion 107, so the first sub-rotating member 37 near the first cam member 21 is zero-matched with the matching surface of the third portion 107 to form a friction surface, and the friction surface is subjected to an axial force of 1.5F. The second sub-rotating member 38 near the second cam member 22 is zero-matched with the matching surface of the third portion 107 to form a friction surface, and the friction surface is subjected to an axial force of 2.5F.

[0089] In summary, the first rotating member 30 is divided into the first sub-rotating member 37 and the second sub-rotating member 38 to form an additional friction surface, and the total axial force on the two friction surfaces of the third part 107 is 1.5F+2.5F=4F. Compared with the form in which the first rotating member 30 is not divided, the axial force on the friction surface of the third part 107 can be increased by 4F-F=3F, which can further increase the torsion of the folding device 1.

[0090] Optionally, only any one first rotating member 30 on one side of the base 10 may be divided into two sub-rotating members, or the two first rotating members 30 on both sides of the base 10 may be equally divided into two sub-rotating members.

[0091] Please refer to Figure 10-15 , Fig.10 This is a schematic diagram of the three-dimensional structure of a folding device in another embodiment of the present application when it is in an unfolded state. Fig.11 for Fig.10 An exploded view of the folding device is shown. Fig.12 for Fig.10 A front view of the folding device is shown. Fig.13 An exploded view of a half-shaft assembly in one embodiment of the present application. Fig.14 This is a schematic diagram of the three-dimensional structure of a folding device in a folded state in yet another embodiment of the present application. Fig.15 for Fig.14 A front view of the folding device is shown.

[0092] In this embodiment, the folding device 1 further includes two second rotating members 40, a connecting member 50, and two supporting members 60. The two second rotating members 40 are respectively rotatably connected to opposite sides of the base 10. The connecting member 50 is located on the same side of the base 10. One of the first rotating member 30 and the second rotating member 40 is rotatably connected to the connecting member 50, and the other is slidably connected to the connecting member 50. Each supporting member 60 is rotatably connected to one of the connecting members 50, and is slidably and rotatably connected to the other of the first rotating member 30 and the second rotating member 40.

[0093] The first rotating member 30, the second rotating member 40, the connecting member 50, and the supporting member 60 in the folding device 1 can be collectively referred to as a track mechanism, which is mainly used to control the movement track of the supporting member 60, ensuring that the rotating shaft 11 area in the folded state is U-shaped or teardrop-shaped, thereby controlling the cross-sectional shape of the flexible screen 93 in the subsequent folded state, ensuring better support for the flexible screen 93 without damaging the internal layer structure of the flexible screen 93. Next, this embodiment will introduce the second rotating member 40, the connecting member 50, and the supporting member 60 in detail in turn.

[0094] The first rotating member 30 and the second rotating member 40 have the same function. In the folding device 1, the folding function is mainly achieved through its ability to rotate, and the components connected to the two second rotating members 40 are driven and limited by the rotation of the two second rotating members 40, so that these components move according to the predetermined motion trajectory. The two second rotating members 40 are rotatably connected to the base 10 and the two second rotating members 40 are respectively arranged on the opposite sides of the base 10, that is, the two second rotating members 40 can rotate relative to the base 10. In other words, the two second rotating members 40 are rotatably connected to the base 10 at one end close to the base 10. Since the base 10 is fixed, only the two second rotating members 40 rotate. It is worth noting that the opposite sides of the base 10 mentioned in this embodiment refer to the opposite sides along the width direction of the base 10, and the width direction can be understood as the arrangement direction of the two second rotating members 40. The opposite sides in this embodiment and the following can be understood in the same way. This embodiment does not limit the parameters such as the shape, structure, material, etc. of the second rotating member 40, as long as the second rotating member 40 can be rotatably connected to the base 10. Optionally, the second rotating member 40 is rotatably connected to the first portion 105 of the base 10 .

[0095] Optionally, the two second rotating members 40 are rotatably connected to the side surface 103 of the base 10. Optionally, in one embodiment, the two second rotating members 40 are arranged axially symmetrically with respect to the base 10. In another embodiment, the two second rotating members 40 are arranged non-axially symmetrically with respect to the base 10, in other words, the two second rotating members 40 have a partially overlapping area in the thickness direction of the folding device 1. This embodiment is only schematically described with the two second rotating members 40 being arranged axially symmetrically with respect to the base 10.

[0096] The connecting member 50 mainly serves to connect various components in the folding device 1. Each second rotating member 40 and one of the first rotating members 30 are rotatably connected to a connecting member 50, and the other is slidably connected to a connecting member 50. That is, each second rotating member 40 is rotatably connected to a connecting member 50, that is, the side of each second rotating member 40 away from the base 10 is rotatably connected to the connecting member 50. In other words, the second rotating member 40 can rotate relative to the connecting member 50. And each first rotating member 30 is slidably connected to a connecting member 50, that is, the side of each first rotating member 30 away from the base 10 is slidably connected to the connecting member 50, which can also be understood as the first rotating member 30 can slide relative to the connecting member 50. Or each second rotating member 40 is slidably connected to the connecting member 50, and each first rotating member 30 is rotatably connected to the connecting member 50. In addition, the connecting member 50 is also used to connect the shell later, so that the connecting member 50 and the shell become a whole, so that when the shell rotates, the connecting member 50 can be driven to rotate together. This embodiment does not limit the shape, structure, material and other parameters of the connecting member 50, as long as the connecting member 50 can realize rotational connection with one rotating member and sliding connection with another rotating member. This embodiment is only schematically described by rotatably connecting each second rotating member 40 to one connecting member 50 and sliding connection with each first rotating member 30 to one connecting member 50.

[0097] The support member 60 is mainly used to support the flexible screen 93 when the folding device 1 is subsequently applied to the electronic device 3, so as to control the folding shape of the flexible screen 93. Optionally, the flexible screen 93 is bonded to the support member 60 so that the shape of the flexible screen 93 is more natural during the bending process, the stress is small after bending, and the damage of the flexible screen 93 is reduced. Each support member 60 is arranged on a connecting member 50. Specifically, the support member 60 is rotatably connected to the connecting member 50, that is, the support member 60 can rotate relative to the connecting member 50, and the support member 60 is slidably and rotatably connected to a first rotating member 30, and the support member 60 can rotate relative to the first rotating member 30, and the support member 60 can also slide relative to the first rotating member 30.

[0098] It should be noted here that the rotation mentioned above can be understood as the two parts being able to perform circular motion around the axis of rotation, with only angle changes but no displacement changes. Sliding can be understood as the two parts being able to perform parallel motion, with only displacement changes but no angle changes. The fact that the two parts can both slide and rotate means that the two parts have both displacement changes and angle changes, and this sliding and rotating can also be called rolling.

[0099] The folding device 1 provided in this embodiment can form a track mechanism with the base 10, two second rotating members 40, two first rotating members 30, and two connecting members 50. In one embodiment, the folding device 1 includes a track mechanism, which is arranged on one side of the support member 60. In another embodiment, the folding device 1 includes two track mechanisms, which are arranged on one side of the support member 60, and the two track mechanisms are arranged along the extension direction of the support member 60. At this time, the support member 60 rotates to connect the two connecting members 50, and slides and rotates to connect the two first rotating members 30. In other embodiments, the folding device 1 includes three or more track mechanisms, which are arranged on one side of the support member 60, and the three or more track mechanisms are arranged along the extension direction of the support member 60. At this time, the support member 60 rotates to connect three or more connecting members 50, and slides and rotates to connect three or more first rotating members 30. This embodiment is only schematically described as the folding device 1 including three track mechanisms and two support members 60. Of course, the solution of two track mechanisms and the solution of one track mechanism should also belong to the protection scope of this application. In addition, when the folding device 1 includes three or more mechanisms, the track mechanisms at both ends may also be provided with synchronization mechanisms and torque mechanisms at the same time. The synchronization mechanism ensures the synchronization of the movement of the connecting members 50 on the left and right sides of the base 10 and the first shell 91 and the second shell 92 during the folding and unfolding process, realizes the symmetry of the movement on both sides and the flexible screen 93, and ensures that the flexible screens 93 on both sides are tightly fitted when folded and the flexible screens 93 are flat when unfolded. Optionally, the first cam member 21 and / or the second cam member 22 may be used in this embodiment to achieve the synchronous rotation of the two first rotating members 30 on the left and right sides. Alternatively, the present embodiment may set a plurality of teeth 80 on the circumferential sides of the two first rotating members 30 on the left and right sides of the base 10, and set a first synchronization gear 81 and a second synchronization gear 82 (such as) between the two first rotating members 30. Figure 2 The two first rotating members 30 are used to realize the synchronous rotation of the two first rotating members 30 on the left and right sides. Alternatively, the above two solutions are used at the same time to realize the synchronous rotation.

[0100] The torsion mechanism realizes the damping feeling during the movement of the folding device 1, ensuring the feel of the product during the unfolding and merging process. In addition, sufficient torque can realize the hovering of the product during the movement, giving the product more playability and usage scenarios. As for the middle track mechanism, it can be only a track mechanism, and a synchronization mechanism can be set on the track mechanism, or a torque mechanism can be set on the track mechanism, or a synchronization mechanism can be set on the track mechanism, or a torque mechanism and a synchronization mechanism can be set on the track mechanism at the same time. In addition, the middle track mechanism can also be an incomplete track mechanism, for example, only the symmetrical second rotating member 40 and the expected matching base 10 are retained in the middle to achieve the effect of middle section support and ensure movement reliability.

[0101] Based on the above connection relationship, it can be known that the folding device 1 provided in this embodiment is composed of 6 kinematic pairs on one side, specifically, the second rotating member 40 cooperates with the base 10 to form a rotating pair, the second rotating member 40 cooperates with the connecting member 50 to form a rotating pair, the first rotating member 30 cooperates with the base 10 to form a rotating pair, the first rotating member 30 cooperates with the connecting member 50 to form a sliding pair, the supporting member 60 cooperates with the first rotating member 30 to form a rolling pair, and the supporting member 60 cooperates with the connecting member 50 to form a rotating pair. Therefore, the total degree of freedom of the various components on one side that cooperate together is 3*4 (a total of 4 components on one side, such as 1 second rotating member 40, 1 first rotating member 30, 1 connecting member 50, and 1 supporting member 60)-2*5 (a total of 6 low pairs on one side, such as 1 sliding pair and 4 rotating pairs)-1*1 (a total of 1 high pair on one side, such as 1 rolling pair) = 1.

[0102] Therefore, when the folding device 1 moves, the movement trajectory and movement route of each component are unique. Specifically, when the folding device 1 is folded, the connecting member 50 rotates relative to the base 10, the second rotating member 40 and the first rotating member 30 also rotate relative to the base 10, the first rotating member 30 also slides relative to the connecting member 50, the first rotating member 30 also slides and rotates relative to the support member 60, and the support member 60 also rotates relative to the connecting member 50, and finally the two support members 60 are folded relative to each other. When the folding device 1 is unfolded, the connecting member 50 rotates relative to the base 10, the second rotating member 40 and the first rotating member 30 also rotate relative to the base 10, the first rotating member 30 also slides relative to the connecting member 50, the first rotating member 30 also slides and rotates relative to the support member 60, and the support member 60 also rotates relative to the connecting member 50, and finally the two support members 60 are unfolded relative to each other.

[0103] The movement process of the folding device 1 mentioned above has a variety of active and passive logical relationships, and the present application uses one specific movement process as an example for illustration. When the folding device 1 is folded, that is, when the folding device 1 is in the process of changing from the unfolded state to the folded state, in other words, when the two connecting members 50 rotate relative to the base 10 and approach each other, since the second rotating member 40 and the first rotating member 30 are both rotated to connect the base 10, the connecting member 50 can drive the second rotating member 40 and the first rotating member 30 to rotate relative to the base 10. And in the process of the second rotating member 40 and the first rotating member 30 rotating, the first rotating member 30 can also slide relative to the connecting member 50, that is, the connecting member 50 can slide along the first rotating member 30, thereby changing the distance between the connecting member 50 and the base 10. When the connecting member 50 slides, since the support member 60 is arranged on the connecting member 50, the connecting member 50 can drive the support member 60 to slide together. When the support member 60 slides, the first rotating member 30 can also slide and rotate relative to the support member 60, thereby driving the support member 60 to rotate relative to the connecting member 50. Of course, in other embodiments, the support member 60 may not rotate relative to the connecting member 50 during the sliding and rotating process of the first rotating member 30, that is, the support member 60 and the connecting member 50 remain stationary, and finally the two support members 60 can be folded with each other.

[0104] Similarly, when the folding device 1 is unfolded, that is, when the folding device 1 is in the process of changing from the folded state to the unfolded state, in other words, when the two connecting members 50 rotate in the opposite direction relative to the base 10 and move away from each other, since the second rotating member 40 and the first rotating member 30 are both rotated to connect the base 10, the connecting member 50 can drive the second rotating member 40 and the first rotating member 30 to rotate relative to the base 10. And during the rotation of the second rotating member 40 and the first rotating member 30, the first rotating member 30 can also slide relative to the connecting member 50, that is, the connecting member 50 can slide along the first rotating member 30, thereby changing the distance between the connecting member 50 and the base 10. When the connecting member 50 slides, since the support member 60 is arranged on the connecting member 50, the connecting member 50 can drive the support member 60 to slide together. When the support member 60 slides, the first rotating member 30 can also slide and rotate relative to the support member 60, thereby driving the support member 60 to rotate relative to the connecting member 50. Of course, in other embodiments, the support member 60 may not rotate relative to the connecting member 50 during the sliding and rotating process of the first rotating member 30, that is, the support member 60 and the connecting member 50 remain stationary, and finally the two support members 60 can be unfolded to each other.

[0105] Of course, in other embodiments, the active and passive relationships of the above-mentioned multiple components can be reversed, for example, the support member 60 can rotate relative to the base 10 to drive the second rotating member 40, the first rotating member 30, and the connecting member 50 to rotate relative to the base 10. Such movement processes and principles should also fall within the protection scope of this application.

[0106] like Fig.12 As shown, when the two support members 60 are parallel to each other and are located on opposite sides of the base 10, the two support members 60 are in a state of being fully unfolded relative to each other. In other words, the folding device 1 is in an unfolded state. Fig.15 As shown in FIG. 1 , when the two support members 60 are both located on one side of the base 10, it can also be understood that the two support members 60 are both located on the top surface 101 of the base 10. At this time, the two support members 60 are in a state of being completely folded with each other. In other words, the folding device 1 is in a folded state. When the two support members 60 are folded with each other, that is, the process of the folding device 1 from the unfolded state to the folded state can also be understood as the process from the unfolded state to the folded state. Figures 12 to 15 When the two support members 60 are unfolded from each other, that is, the process of the folding device 1 from the folded state to the unfolded state can also be understood as the process from Figure 15 to Figure 12 process.

[0107] like Fig.15 As shown, when the folding device 1 is in a folded state, the two support members 60 and the base 10 are jointly enclosed to form a screen space 1a for accommodating the flexible screen 93. The folding device 1 provided in this embodiment can make the cross-sectional shape of the screen space 1a U-shaped or teardrop-shaped. When the cross-sectional shape of the screen space 1a is U-shaped, the distance between the two support members 60 at the end away from the base 10 is equal to the distance between the two support members 60 at the end close to the base 10. At this time, the structure of the folding device 1 is simple and the reliability of the whole machine is high. When the cross-sectional shape of the screen space 1a is teardrop-shaped, the distance between the two support members 60 at the end away from the base 10 is less than the distance between the two support members 60 at the end close to the base 10. At this time, after folding, the whole folding device 1 is thinner and flat. This embodiment is only schematically illustrated with the cross-sectional shape of the screen space 1a being teardrop-shaped.

[0108] Optionally, in addition to the support member 60, the folding device 1 may further include other support members 60' for supporting the flexible screen 93. For example, the support member 60' is disposed between two support members 60, the support member 60' is mounted on the base 10, and when the folding device 1 is in the unfolded state, the two support members 60 are arranged flush with the support member 60', so that the flexible screen 93 is supported by three components. In this case, the support member 60 can also be called an inclined plate, and the support member 60' can also be called a middle plate.

[0109] It is also worth noting that the present application will describe in detail the components that cooperate with each other in pairs. Since most components are two in number and are symmetrically arranged, this embodiment only describes the components that cooperate with each other in pairs. Fig.11 and Figure 1 The components on the right side of the base 10 in the folding device 1 are schematically illustrated, and the same understanding can be applied to the components on the left side of the base 10 .

[0110] Please refer to Fig.16 , Fig.16 Schematic diagram of the coordination of the base, the first rotating member, the second rotating member, and the connecting member in one embodiment of the present application. In the embodiment, the third rotating axis C3 between the second rotating member 40 and the base 10 and the fourth rotating axis C4 between the first rotating member 30 and the base 10 are parallel to each other. The third rotating axis C3 is farther away from the bottom surface 102 of the base 10 than the fourth rotating axis C4, and when the folding device 1 is in the unfolded state, the third rotating axis C3 is farther away from the connecting member 50 than the fourth rotating axis C4. In other words, the third rotating axis C3 is higher and further to the left than the fourth rotating axis C4, so in Fig.16 In the figure, the third rotation axis C3 is located at the upper left, and the fourth rotation axis C4 is located at the lower right. The second rotating member 40 moves in the form of rotation, which determines the position of the connecting member 50 during the movement. The first rotating member 30 moves in the form of rotation and sliding, which determines the angle of the connecting member 50 during the movement. The second rotating member 40 and the first rotating member 30 cooperate with each other to jointly determine the position and angle of the connecting member 50.

[0111] Specifically, when the second rotating member 40 and the first rotating member 30 rotate, the connecting member 50 can slide in a direction away from the base 10 on the basis of sliding the connecting member 50 relative to the first rotating member 30 when the folding device 1 is folded. When the folding device 1 is unfolded, the connecting member 50 slides in a direction close to the base 10, which can further make the support member 60 move according to a preset trajectory, so that when the folding device 1 is in a folded state, the folding device 1 forms a water drop-shaped screen space 1a. In this way, no matter whether the folding device 1 is folded or unfolded, when the connecting member 50 rotates relative to the base 10, the second rotating member 40 and the first rotating member 30 are also driven to rotate relative to the base 10, so that the connecting member 50 slides relative to the first rotating member 30, thereby changing the distance between the connecting member 50 and the base 10, driving the support member 60 rotatably connected to the connecting member 50 to slide relative to the first rotating member 30, changing the distance between the support member 60 and the base 10, and then realizing the subsequent movement process. In summary, in this embodiment, no new components need to be added, and the sliding of the connecting member 50 relative to the first rotating member 30 can be achieved only by designing the positions of the third rotating axis C3 and the fourth rotating axis C4 .

[0112] In this embodiment, the second rotating member 40 and the base 10 are connected by the first arc track and the first arc groove, the first arc track is provided on one of the second rotating member 40 and the base 10, and the first arc groove is provided on one of the second rotating member 40 and the base 10. This embodiment is only schematically described by providing the first arc track on the second rotating member 40 and the first arc groove on the third portion 107 of the base 10. The position of the third rotation axis C3 can be better adjusted by the first arc track and the first arc groove, so that the third rotation axis C3 and the fourth rotation axis C4 meet the above-mentioned position relationship.

[0113] In this embodiment, the first rotating member 30 and the base 10 are connected by the first rotating shaft and the first rotating hole, the first rotating shaft is provided at one of the first rotating member 30 and the base 10, and the first rotating hole is provided at the other of the first rotating member 30 and the base 10. This embodiment is only schematically described by providing the first rotating shaft at the base 10 and the first rotating hole at the first rotating member 30. It is worth noting that in this embodiment, the first rotating shaft is the rotating shaft 11 mentioned above.

[0114] In this embodiment, the second rotating member 40 and the connecting member 50 are connected by a second rotating shaft and a second rotating hole, the second rotating shaft is provided at one of the second rotating member 40 and the connecting member 50, and the second rotating hole is provided at the other of the second rotating member 40 and the connecting member 50. This embodiment is only schematically described by providing the second rotating shaft at the connecting member 50 and the second rotating hole at the second rotating member 40.

[0115] Please refer to Figure 17-Figure 18 , Fig.17 It is a schematic diagram of an exploded view of a second rotating member and a connecting member in one embodiment of the present application. Fig.18 The figure is an exploded schematic diagram of the base, the second rotating member, and the connecting member in one embodiment of the present application. In this embodiment, the first rotating member 30 and the connecting member 50 are connected by the sliding block 42 and the sliding groove 52, the sliding block 42 is provided at one of the first rotating member 30 and the connecting member 50, and the sliding groove 52 is provided at the other of the first rotating member 30 and the connecting member 50. The connecting member 50 has a back surface 500 for facing away from the flexible screen 93, and the distance between the end of the sliding block 42 close to the base 10 and the back surface 500 is smaller than the distance between the end of the sliding block 42 away from the base 10 and the back surface 500.

[0116] The sliding block 42 is not arranged horizontally but inclined, and the farther the sliding block 42 is from the base 10, the greater the distance between the sliding block 42 and the back 500. Since the sliding block 42 is arranged inclined, the sliding groove 52 is also arranged inclined to match the sliding block 42, and the distance between the end of the sliding groove 52 close to the base 10 and the back 500 is smaller than the distance between the end of the sliding groove 52 away from the base 10 and the back 500. When the folding device 1 is changed from the unfolded state to the folded state, the connecting member 50 slides relative to the first rotating member 30 in the direction away from the base 10. By designing the shapes of the sliding block 42 and the sliding groove 52, not only can the supporting member 60 be further moved according to the preset trajectory, but also when the folding device 1 is in the folded state, the folding device 1 forms a water drop-shaped screen space 1a. And when the two connecting members 50 slide in the direction away from the base 10, the two connecting members 50 are also close to each other, so that when the folding device 1 is in the folded state, the distance between the two connecting members 50 can be reduced, and the thickness of the folding device 1 in the folded state can be reduced. The two opposite ends of the flexible screen 93 can also be made to abut against each other, thereby eliminating the gap between the two ends of the flexible screen 93 when in the folded state, thereby improving the safety performance of the flexible screen 93 and improving the appearance effect.

[0117] Please refer to Figure 19-21 , Fig.19 It is a schematic diagram of an exploded view of a base, a second rotating member, and a part of a supporting member in one embodiment of the present application. Fig. 20 It is a cross-sectional schematic diagram of the base, the second rotating member, and the supporting member when the folding device is in an unfolded state in one embodiment of the present application. Fig.21 It is a cross-sectional schematic diagram of the base, the second rotating member, and the supporting member when the folding device is in a folded state in one embodiment of the present application.

[0118] In this embodiment, the support member 60 includes a support portion 61 and a rolling portion 62. The support portion 61 has a support surface 610 for supporting the flexible screen 93. The rolling portion 62 is disposed on a side of the support portion 61 away from the support surface 610. The first rotating member 30 and the rolling portion 62 are connected by a first rolling shaft 43 and a first rolling groove 620. The first rolling shaft 43 is disposed on one of the first rotating member 30 and the rolling portion 62. The first rolling groove 620 is disposed on the other of the first rotating member 30 and the rolling portion 62. The first rolling groove 620 has a third limiting end 621 and a fourth limiting end 622 that are disposed opposite to each other. The third limiting end 621 is further away from the base 10 than the fourth limiting end 622, and the third limiting end 621 is further away from the support surface 610 than the fourth limiting end 622. When the folding device 1 is in the unfolded state, the first rolling shaft 43 is positioned at the third limit end 621 , and when the folding device 1 is in the folded state, the first rolling shaft 43 is positioned at the fourth limit end 622 .

[0119] The third limit end 621 is farther from the base 10 than the fourth limit end 622, and the third limit end 621 is farther from the support surface 610 than the fourth limit end 622. In other words, the third limit end 621 is further to the right and lower than the fourth limit end 622, that is, the third limit end 621 is located at the lower right position, and the fourth limit end 622 is located at the upper left position. During the movement of the folding device 1, when the folding device 1 is in the unfolded state, the first rolling axis 43 is positioned at the third limit end 621 to prevent the support member 60 from folding back and damaging the subsequent flexible screen 93. When the folding device 1 is in the folded state, the first rolling axis 43 is positioned at the fourth limit end 622 to prevent the support member 60 from folding back and damaging the subsequent flexible screen 93. It can also be understood that when the folding device 1 is in the unfolded state, the first rolling axis 43 is located at the lower right, and when the folding device 1 is in the folded state, the first rolling axis 43 is located at the upper left.

[0120] The first rolling groove 620 also has a first connecting portion 623 connecting the third limiting end 621 and the fourth limiting end 622. The first connecting portion 623 protrudes in the direction away from the support surface 610, so that the position of the first rolling shaft 43 in the first rolling groove 620 can be controlled during the entire movement process, thereby controlling the positional relationship between the rotation axis between the support member 60 and the connecting member 50 and the first rolling shaft 43, so that the support member 60 rotates to form a teardrop shape in the folded state. In addition, the arc-shaped first rolling groove 620 can also make the rolling of the first rolling shaft 43 smoother, thereby improving the smoothness and stability of the movement of the folding device 1. Of course, in other embodiments, the shape of the first connecting portion 623 can also be a straight line, or other shapes, as long as the positions of the third limiting end 621 and the fourth limiting end 622 meet the above-mentioned positional relationship.

[0121] The first rolling groove 620 also has a second connecting portion 624 connecting the first connecting portion 623 and the third limiting end 621, and the extension direction of the second connecting portion 624 is parallel to the support surface 610. In the process of the folding device 1 from the unfolded state to the folded state, the first rolling shaft 43 does not move directly from the third limiting end 621 to the second connecting portion 624, but first moves to the second connecting portion 624, and then moves to the first connecting portion 623. In this way, when the folding device 1 is in the unfolded state, the horizontal second connecting portion 624 can be used to support the first rolling shaft 43, and the second connecting portion 624 can be used to achieve buffering, so as to prevent the first rolling shaft 43 from moving from the third limiting end 621 to the arc-shaped first connecting portion 623 by itself, thereby improving the stability of the folding device 1. In addition, the horizontally arranged second connecting portion 624 can also reduce the gap between the first rolling shaft 43 and the first rolling groove 620 to prevent the existence of a virtual position.

[0122] In this embodiment, the support member 60 and the connecting member 50 are connected by the third arc track and the third arc groove, the third arc track is provided on one of the support member 60 and the connecting member 50, and the third arc groove is provided on the other of the support member 60 and the connecting member 50. This embodiment is only schematically described with the third arc track provided on the support member 60 and the third arc groove provided on the connecting member 50.

[0123] In this embodiment, the second rotating member 40 and the support member 60 are connected by a constraint shaft and a constraint hole. The constraint shaft is provided at one of the second rotating member 40 and the support member 60, and the constraint hole is provided at the other of the second rotating member 40 and the support member 60. This embodiment is only schematically illustrated by providing the constraint shaft at the second rotating member 40 and the constraint shaft at the support member 60. The constraint shaft and the constraint hole can cooperate with each other to prevent the support member 60 from excessively rotating relative to the second rotating member 40 during the movement of the folding device 1, thereby warping and subsequently affecting the folding of the flexible screen 93. In other words, this embodiment limits the movement trajectory of the inclined plate by adding a virtual constraint between the second rotating member 40 and the support member 60, ensuring that the movement deviation causes the inclined plate to warp during the flattening process and affects the folding of the flexible screen 93, but the constraint shaft and the constraint hole do not affect the degree of freedom of the folding device 1.

[0124] Please refer to Figure 22-Figure 23 , Fig. 22 It is a schematic diagram of the three-dimensional structure of the shell assembly in an embodiment of the present application when it is in an unfolded state. Fig.23 The 3D schematic diagram of the housing assembly in a folded state in one embodiment of the present application is shown in FIG. The housing assembly 2 in this embodiment includes a first housing 91 , a second housing 92 , and a folding device 1 as provided in the above embodiment of the present application, wherein the folding device 1 is connected between the first housing 91 and the second housing 92 .

[0125] The housing assembly 2 is a combined component, that is, the housing assembly 2 includes at least two components. In this embodiment, the housing assembly 2 mainly includes two housings and the folding device 1 provided in the above embodiment of the present application. The first housing 91 and the second housing 92 are mainly used to install and carry components. For example, a flexible screen 93 can be carried on the first housing 91 and the second housing 92, and functional modules such as batteries, PCB components, speakers, receivers, buttons, etc. can be arranged in the first housing 91 and the second housing 92. Therefore, the first housing 91 and the second housing 92 mainly play the role of installation and protection. In some embodiments, the surface of the first housing 91 and the second housing 92 can also serve as the appearance surface, so the surface of the first housing 91 and the second housing 92 can be designed accordingly, so that the first housing 91 and the second housing 92 have a unique appearance effect. This embodiment does not limit the parameters such as the shape, material, structure, etc. of the first housing 91 and the second housing 92, as long as the installation and protection functions can be achieved. For example, the material of the first housing 91 and the second housing 92 can be all metal, or all plastic, or partly metal and partly plastic.

[0126] One connecting member 50 of the folding device 1 is connected to the first shell 91, and the other connecting member 50 is connected to the second shell 92, so that when the first shell 91 and the second shell 92 rotate, the two connecting members 50 are driven to rotate relative to the base assembly 10', thereby realizing the subsequent movement process, such as the movement of the first rotating member 30, the second rotating member 40, and the support member 60, and the relative movement of the first moving member and the second moving member, providing damping for the movement of the shell assembly 2. The shell assembly 2 provided in this embodiment can improve the torsion of the shell assembly 2 by adopting the folding device 1 provided in the above embodiment of the present application. When the size of the shell assembly 2 becomes smaller, it can still meet the opening and closing feel and hovering requirements of the whole machine, thereby achieving the purpose of miniaturization.

[0127] Please refer to Figure 24-25 , Fig.24 It is a schematic diagram of the three-dimensional structure of an electronic device in an unfolded state according to one embodiment of the present application. Fig.25 The three-dimensional structure diagram of an electronic device in an embodiment of the present application when it is in a folded state. The electronic device 3 in this embodiment includes a flexible screen 93 and a housing assembly 2 as provided in the above embodiment of the present application, wherein the flexible screen 93 is disposed on the same side of the first housing 91, the second housing 92, and the folding device 1.

[0128] The electronic device 3 includes, but is not limited to, mobile terminals such as mobile phones, tablet computers, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, and fixed terminals such as digital TVs and desktop computers. This embodiment does not limit the types of electronic devices 3, and only uses a foldable mobile phone as an example for schematic illustration.

[0129] The electronic device 3 includes a flexible screen 93 and a shell assembly 2. The flexible screen 93 is a component with a certain flexibility. Compared with a rigid component, the flexible screen 93 can be bent to a certain extent. For example, the flexible screen 93 includes but is not limited to various flexible components with corresponding functions such as a flexible display screen, a flexible touch screen, and a flexible touch display screen, or a flexible component fixedly bonded with a flexible support plate, such as a flexible display screen and a flexible touch screen bonded with a flexible steel plate. The flexible screen 93 is arranged on the same side of the first shell 91 and the second shell 92 in the shell assembly 2, and can be bent or flattened with the shell assembly 2. Specifically, the flexible screen 93 has a flexible screen 93 in a bending area 930, and a flexible screen 93 in a non-bending area 931 arranged on opposite sides of the flexible screen 93 in the bending area 930. The flexible screen 93 in the bending area 930 is arranged corresponding to the support member 60 of the bonding and folding device 1, and the flexible screen 93 in the non-bending area 931 is fixedly arranged in the first shell 91 and the second shell 92. Since the flexible screen 93 of the bending area 930 is correspondingly attached to the support member 60 of the folding device 1, the shape of the folding device 1 changes when it moves, so it can drive the flexible screen 93 of the bending area 930 to bend as well, thereby bending or flattening with the movement of the electronic device 3. Since the flexible screen 93 of the non-bending area 931 is fixed on the first shell 91 and the second shell 92, the first shell 91 and the second shell 92 can only rotate relative to each other, and the shape itself will not change. Therefore, even if the first shell 91 and the second shell 92 rotate, the flexible screen 93 on the first shell 91 and the second shell 92 will not bend.

[0130] The electronic device 3 provided in this embodiment can improve the torque of the electronic device 3 by adopting the shell assembly 2 provided in the above embodiment of the present application. When the size of the electronic device 3 becomes smaller, it can still meet the opening and closing feel and hovering requirements of the whole machine, thereby achieving the purpose of miniaturization.

[0131] Please refer to Fig.26 , Fig.26Schematic diagram of an electronic device in another embodiment of the present application. In this embodiment, the electronic device 3 further includes a first mainboard 911 and a first battery 912 disposed in the first housing 91, and a second mainboard 921 and a second battery 922 disposed in the second housing 92. Along the axial direction of the rotating shaft 11, the first mainboard 911 is closer to the end of the first housing 91 than the first battery 912, and the second mainboard 921 is closer to the end of the second housing 92 than the second battery 922.

[0132] The electronic device 3 includes multiple folding devices 1, one folding device 1 is closer to the first main board 911 and the second main board 921 than another folding device 1, and one folding device 1 is a folding device 1 that only includes a first elastic member 23; the electronic device 3 also includes a flexible circuit board 94, one end of the flexible circuit board 94 is electrically connected to the first main board 911, and the other end passes through the gap between one folding device 1 and another folding device 1 and is electrically connected to the second main board 921.

[0133] The electronic device 3 includes a first shell 91 and a second shell 92 located on both sides of the folding device 1, and each shell is provided with a main board and a battery. For example, a first main board 911 and a first battery 912 are provided in the first shell 91, and a second main board 921 and a second battery 922 are provided in the second shell 92. The main board in each shell is located at the end of the shell along the axial direction of the rotating shaft 11 compared to the battery, that is, the main board is arranged on the outside, and the battery is located in the middle of the shell. Optionally, a small plate may also be provided in each shell, for example, a first small plate 913 is provided in the first shell 91, and a second small plate 923 is provided in the second shell 92, and the small plate and the main board are located on opposite sides of the battery.

[0134] And the electronic device 3 may include a plurality of folding devices 1, and the plurality of folding devices 1 may share one or two supporting members 60, that is, a common inclined plate, and the remaining components such as the base 10, the first rotating member 30, the second rotating member 40, the connecting member 50, the first elastic member 23, the second elastic member 26, etc. may be referred to as a semi-axis assembly 1b. It can also be understood that the track mechanism, the synchronization mechanism, and the torque mechanism may constitute a semi-axis assembly 1b. Therefore, the folding device 1 may include two inclined plates, a middle plate, and a plurality of semi-axis assemblies 1b. This embodiment is only schematically illustrated with three semi-axis assemblies 1b. The three semi-axis assemblies 1b are arranged at intervals along the extension direction of the inclined plate, wherein the semi-axis assembly 1b close to one side of the main board is referred to as the top semi-axis assembly 1b, the middle semi-axis assembly 1b is referred to as the middle semi-axis assembly 1b, and the semi-axis assembly 1b close to the small board on the other side is referred to as the bottom semi-axis assembly 1b.

[0135] In the related art, due to the need for stacking the whole machine, it is necessary to realize the electrical connection between the main boards of the flexible printed circuit 94 (Flexible Printed Circuit, FPC) arranged in the left and right shells, that is, the two ends of the FPC need to be electrically connected to the first main board 911 and the second main board 921 in the first shell 91 and the second shell 92 respectively. Therefore, the FPC needs to pass through the gap between the top half-shaft assembly 1b and the bottom half-shaft assembly 1b.

[0136] This embodiment can make the top half-axis assembly 1b a folding device 1 of the above embodiment that only includes the first elastic member 23. Since only the first elastic member 23 is used, the top half-axis assembly 1b can be compactly arranged and have a shorter overall length, meeting the layout requirements of the through-axis FPC. The FPC can pass through and connect to the mainboard from a position close to the end, thereby reducing the size of the mainboard, thereby increasing the size of the battery and improving the battery life of the electronic device 3.

[0137] In addition, the middle half-axle assembly 1b can be a folding device 1 that includes both the first elastic member 23 and the second elastic member 26 in the above embodiment to maximize the torque. As for the bottom wall half-axle assembly 1b, the top half-axle assembly 1b solution or the middle half-axle assembly 1b solution can be adopted according to actual needs.

[0138] In summary, in this embodiment, the top half-axis assembly and the middle half-axis assembly are designed with differentiated layouts to meet the functional requirements and narrow width requirements of the top half-axis assembly, so that the top half-axis assembly is reasonably laid out to meet the basic trajectory while being relatively short in length, meeting the requirement of stacking the through-axis FPC at the upper position.

[0139] In the description of the present application, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0140] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0141] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated. It can be mechanically connected or electrically connected. It can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0142] The above describes the contents provided by the implementation methods of the present application in detail, and describes and illustrates the principles and implementation methods of the present application. These descriptions are only used to help understand the method and its core ideas of the present application. However, the contents of this specification should not be construed as limiting the present application, and those skilled in the art may make various changes and modifications to the present application without departing from the spirit and scope of the present application. These modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents.

Claims

1. A folding device, characterized in that: include: A base assembly, comprising a base and two rotating shafts arranged on opposite sides of the base; Two first rotating members, each sleeved with one of the rotating shafts and capable of rotating relative to the base, wherein along the axial direction of the rotating shaft, one side of each of the first rotating members is provided with a first cam, and the other side is provided with a second cam; A first cam member, sleeved on the two rotating shafts, wherein one side of the first cam member close to the two first rotating members is provided with two third cams matched with the two first cams; At least one first elastic member, sleeved on the rotating shaft, one end of the first elastic member abuts against a side of the first cam member away from the first rotating member, and the other end is fixed to the rotating shaft; as well as The second cam member is sleeved on the two rotating shafts. The second cam member and the first cam member are arranged on opposite sides of the first rotating member. Two fourth cams matching with the two second cams are arranged on one side of the second cam member close to the two first rotating members.

2. The folding device according to claim 1, characterized in that: The folding device includes a first limiting member and at least three first elastic members. A rotating shaft portion is provided on the side of the first cam member facing away from the first rotating member. The first limiting member is clamped on the rotating shaft. One first elastic member is sleeved on one rotating shaft, another first elastic member is sleeved on another rotating shaft, and the remaining first elastic members are sleeved on the rotating shaft portion. One end of at least three first elastic members abuts against the first cam member, and the other end abuts against the first limiting member.

3. The folding device according to claim 1, characterized in that: The folding device also includes a second limiting member mounted on the two rotating shafts, the second limiting member is arranged on the side of the first rotating member away from the second cam member, the base assembly base of the second cam member close to the first rotating member is provided with a first limiting portion, and the rotating shaft of the second limiting member on the side away from the second cam member is provided with a second limiting portion.

4. The folding device according to claim 1, characterized in that: The folding device further comprises at least one second elastic member, the second elastic member is sleeved on the rotating shaft, one end of the second elastic member abuts against the second cam member, and the other end of the second elastic member abuts against the base.

5. The folding device according to claim 4, characterized in that: The base includes a first part, a second part, a third part, and a connecting part, the first part is used to set the second rotating member, the second part is connected to the first part, the third part is farther away from the first part than the second part, one end of the rotating shaft is set at the second part, and the other end passes through the third part, the other end of the second elastic member abuts against the second part, and the connecting part is connected between the second part and the third part, and is located between the two rotating shafts; The first rotating member has a receiving groove, the end of the third part is arranged in the receiving groove, and along the axial direction of the rotating shaft, the groove wall of the receiving groove abuts against the third part.

6. The folding device according to claim 5, characterized in that: The second part is slidably connected to the first part, and the folding device further comprises a second rotating member rotatably connected to the first part, and along the axial direction of the rotating shaft, one end of the second rotating member abuts against the first part, and the other end abuts against the second part, and the folding device satisfies at least one of the following conditions: A fifth cam is provided on one side of the second rotating member, and a sixth cam matching with the fifth cam is provided on the first part; A seventh cam is disposed on the other side of the second rotating member, and an eighth cam matched with the seventh cam is disposed on the second portion.

7. The folding device according to claim 5, characterized in that: The first rotating member includes a first sub-rotating member and a second sub-rotating member connected in a split manner, the first sub-rotating member and the second sub-rotating member are arranged on opposite sides of the third part, the first sub-rotating member has a first sub-receiving groove, the second sub-rotating member has a second sub-receiving groove, the first sub-receiving groove and the second sub-receiving groove are jointly arranged to form the receiving groove, along the axial direction of the rotating shaft, the groove wall of the first sub-receiving groove abuts against the surface of one side of the third part, and the groove wall of the second sub-receiving groove abuts against the surface of the other side of the third part.

8. The folding device according to any one of claims 1 to 7, characterized in that: The folding device also includes: Two second rotating members are rotatably connected to opposite sides of the base respectively; A connecting member, wherein one of the first rotating member and the second rotating member located on the same side of the base is rotatably connected to the connecting member, and the other is slidably connected to the connecting member; and Two supporting members, each of which is rotatably connected to one of the connecting members, and is slidably and rotatably connected to the other of the first rotating member and the second rotating member.

9. A housing assembly, characterized in that: The shell assembly includes a first shell, a second shell, and a folding device as described in any one of claims 1 to 8, and the folding device is connected between the first shell and the second shell.

10. An electronic device, characterized in that: The electronic device comprises a flexible screen and a housing assembly as claimed in claim 9, wherein the flexible screen is arranged on the same side of the first housing, the second housing, and the folding device.

11. The electronic device according to claim 10, characterized in that: The electronic device further comprises a first mainboard and a first battery disposed in the first housing, and a second mainboard and a second battery disposed in the second housing, wherein along the axial direction of the rotating shaft, the first mainboard is closer to an end of the first housing than the first battery, and the second mainboard is closer to an end of the second housing than the second battery; The electronic device includes multiple folding devices, one folding device is closer to the first main board and the second main board than another folding device, and one folding device is the folding device according to claim 1; the electronic device also includes a flexible circuit board, one end of the flexible circuit board is electrically connected to the first main board, and the other end passes through the gap between one folding device and another folding device and is electrically connected to the second main board.

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