Folding Component and Electronic Device

Abstract

The present application provides a folding component and an electronic device. The folding component includes a first main swing arm, a first torsion swing arm, a first shaft body, and a damping component; a first sliding groove is provided on the first main swing arm, the first sliding groove includes a first acceleration section and a first constant-speed section that are connected to each other, and the absolute value of the slope of the first acceleration section is greater than the absolute value of the slope of the first constant-speed section; the first torsion swing arm includes a first end and a second end; the first shaft body passes through the first end and is connected to the first torsion swing arm and the first main swing arm through the first sliding groove; the damping component is rotationally connected to the second end. When the first torsion swing arm rotates relative to the damping component, the first shaft body moves from the first acceleration section to the first constant-speed section, and the damping component is converted from a first resistance state to a second resistance state. The rotational resistance of the damping component to the first torsion swing arm in the second resistance state is greater than the rotational resistance of the damping component to the first torsion swing arm in the first resistance state. The technical solution of the present application can achieve large-angle hovering while ensuring the service life of the cam.

Description

[0001] This application claims the priority of a Chinese patent application titled "Folding Device and Electronic Device" with the application number 202210021087.5 and filed with the Chinese Patent Office on January 10, 2022. The entire content thereof is incorporated herein by reference. Technical Field

[0002] This application relates to the technical field of foldable electronic devices, and particularly to a folding assembly and an electronic device. Background Art

[0003] With the increasing maturity of flexible folding screen technology, folding terminal products have become a major trend. Folding terminal products (such as folding mobile phones, folding tablets, folding computers, etc.) need to meet high reliability and good operating experience. In order to achieve hovering of folding terminal products at different angles, it is usually necessary to change the surface shape of the cam. However, changing the surface shape of the cam easily causes the risk of reducing the cam life. How to achieve large-angle hovering while ensuring the cam life is a subject continuously explored by the industry. Summary of the Invention

[0004] Embodiments of this application provide a folding assembly and an electronic device, which can achieve large-angle hovering while ensuring the cam life.

[0005] In a first aspect of this application, a folding assembly is provided. The folding assembly includes:

[0006] A first main swing arm, on which a first sliding groove is provided. The first sliding groove includes a first acceleration section and a first constant-speed section connected to each other. The absolute value of the slope of the first acceleration section is greater than the absolute value of the slope of the first constant-speed section;

[0007] A first torsion swing arm, which includes a first end and a second end;

[0008] A first shaft body, which passes through the first end and is connected to the first sliding groove to connect the first torsion swing arm and the first main swing arm; and

[0009] A damping assembly, which is rotatably connected to the second end. When the first torsion swing arm rotates relative to the damping assembly, the first shaft body moves from the first acceleration section to the first constant-speed section, and the damping assembly is converted from a first resistance state to a second resistance state. The rotational resistance of the damping assembly to the first torsion swing arm in the second resistance state is greater than the rotational resistance of the damping assembly to the first torsion swing arm in the first resistance state.

[0010] It can be understood that, under the development trend of miniaturization of the folding component, the sizes of the spring and the cam in the damping component have both decreased significantly, thereby resulting in a relatively small damping force provided by them. If it is desired to ensure that the damping force provided is appropriate, it is necessary to change the surface shape of the cam so as to increase the climbing amount of the cam, increase the climbing angle, and increase the damping force. However, changing the surface shape of the cam will lead to a reduction in the working life of the cam, and thus cause the folding component to fail.

[0011] Therefore, in the embodiments of the present application, the surface shape of the cam can be maintained unchanged to extend the service life of the cam, and only the differential cooperation between the first main swing arm and the first torsion swing arm is used to further expand the hoverable angle range, which is beneficial to achieving large-angle hovering of the folding component. For example, the hoverable angle range of the folding component in the prior art is 80°-120°, and the hoverable angle range of the folding component in the technical solution of the present application can be 30°-150°, and the hoverable range of the folding component is further expanded compared with the hoverable angle range of the prior art. Among them, the differential cooperation between the first main swing arm and the first torsion swing arm can be understood as the difference in the rotation angles between the first main swing arm and the first torsion swing arm. For example, originally, when the first main swing arm rotates 1°, the first torsion swing arm also rotates 1°. Under differential cooperation, it can be that the first main swing arm rotates 1° and the first torsion swing arm rotates 2°. The realization of the differential cooperation between the main swing arm and the torsion swing arm is achieved by designing the first sliding groove provided on the first main swing arm.

[0012] It can be understood that the first shaft body can slide within the first acceleration section and the first constant-speed section, and the sliding speed of the first shaft body within the first acceleration section and the first constant-speed section is related to the absolute value of the slope of the first acceleration section and the first constant-speed section. Specifically, when the first shaft body moves in a section with a relatively large absolute value of the slope, the movement speed of the first shaft body in this section is relatively fast. Therefore, at this stage, the angle change between the first main swing arm and the second main swing arm is faster. And at this stage, the damping component is in the first resistance state, and the first torsion swing arm can rotate freely.

[0013] When the first shaft body moves in a section with a relatively small absolute value of the slope, the movement speed of the first shaft body in this section is relatively slow. Therefore, at this stage, the angle change between the first main swing arm and the second main swing arm is slower. And at this stage, the damping component is in the second resistance state, and the first torsion swing arm can rotate to a certain angle and then stay at this angle.

[0014] That is to say, during the folding process of the folding assembly, the range of the rotation angle of the folding assembly corresponding to the first constant-speed section is larger, while the range of the rotation angle of the folding assembly corresponding to the first acceleration section is smaller, thereby effectively increasing the time of the hovering stage with the maximum damping of the folding assembly. Also, since the time of the hovering stage with the maximum damping of the folding assembly is extended, the hover angle range of the folding assembly can be further expanded, which is conducive to achieving a large-angle hover of the folding assembly.

[0015] Under this setting, the movement speeds of the first torsion swing arm and the first main swing arm can conform to the relationship of differential matching, so that the damping component can be in the second resistance state as much as possible during the rotation of the first main swing arm, which is conducive to extending the time of the hoverable stage of the folding assembly.

[0016] In a possible implementation manner, the first chute further includes a second constant-speed section and a second acceleration section. One end of the second constant-speed section is connected to the first constant-speed section, the other end of the second constant-speed section is connected to the second acceleration section, the absolute value of the slope of the second acceleration section is greater than the absolute value of the slope of the second constant-speed section, and the second constant-speed section is rotationally symmetric with the first constant-speed section;

[0017] When the first shaft body moves from the first constant-speed section to the second constant-speed section, the damping component maintains the second resistance state. When the first shaft body moves from the second constant-speed section to the second acceleration section, the damping component is converted from the second resistance state to the third resistance state. The rotational resistance of the damping component to the first torsion swing arm in the second resistance state is greater than the rotational resistance of the damping component to the first torsion swing arm in the third resistance state.

[0018] The second constant-speed section is rotationally symmetric with the first constant-speed section. That is to say, the first constant-speed section can be obtained by rotation transformation around a certain point to get the second constant-speed section, and the second constant-speed section can be obtained by rotation transformation around the same point to get the first constant-speed section.

[0019] It should be noted that the embodiments of the present application do not strictly limit the rotation angle required for the first constant-speed section to be rotationally transformed into the second constant-speed section or the second constant-speed section to be rotationally transformed into the first constant-speed section. It can be any angle on the basis of meeting the working requirements of the folding assembly, such as 170°, 180°, etc.

[0020] Therefore, due to the rotationally symmetric setting of the first constant-speed section and the second constant-speed section, the absolute value of the slope change at the connection between the first constant-speed section and the second constant-speed section is small. The small absolute value of the slope change can make the speed change of the first shaft body small when it moves from the end of the first constant-speed section to the beginning of the second constant-speed section, and further can make the speed change of the first shaft body small when it transitions from the first constant-speed section to the second constant-speed section.

[0021] It can be understood that the second shaft body can slide within the second acceleration section and the second constant-speed section, and the sliding speed of the second shaft body within the second acceleration section and the second constant-speed section is related to the absolute value of the slope of the second acceleration section and the second constant-speed section. Specifically, when the second shaft body moves in a section with a smaller absolute value of the slope, the movement speed of the second shaft body in this section is slower. Therefore, in this stage, the change in the angle between the first main swing arm and the second main swing arm is slower. And in this stage, the damping component is in the second resistance state, and the second torsion swing arm can rotate to a certain angle and then stay at that angle.

[0022] When the second shaft body moves in a section with a larger absolute value of the slope, the movement speed of the second shaft body in this section is faster. Therefore, in this stage, the change in the angle between the second main swing arm and the second main swing arm is faster. And in this stage, the damping component is in the third resistance state, and the second torsion swing arm can rotate freely.

[0023] That is to say, during the folding process of the folding assembly, the range of the rotation angle of the folding assembly corresponding to the second constant-speed section is larger, while the range of the rotation angle of the folding assembly corresponding to the second acceleration section is smaller, thereby effectively increasing the time of the hovering stage with the largest damping of the folding assembly. Also, since the time of the hovering stage with the largest damping of the folding assembly is extended, the hoverable angle range of the folding assembly can be further expanded, which is beneficial to realizing the large-angle hovering of the folding assembly.

[0024] Under this setting, the movement speeds of the first torsion swing arm and the first main swing arm can conform to the differential matching relationship, so that the damping component can be in the second resistance state as much as possible during the rotation of the first main swing arm, which is beneficial to extending the time of the hoverable stage of the folding assembly.

[0025] In a possible implementation manner, the center of curvature of the first acceleration section and the center of curvature of the second acceleration section are respectively located on both sides of the first chute.

[0026] Among them, the center of curvature of the first acceleration section and the center of curvature of the second acceleration section being respectively located on both sides of the first chute can be understood as that, based on the first chute as a reference, one of the center of curvature of the first acceleration section and the center of curvature of the second acceleration section is on one side of the first chute, and the other is on the opposite side of the first chute. And, the center of curvature of the first acceleration section and the center of curvature of the first constant-speed section are located on the same side of the first chute, and the center of curvature of the second acceleration section and the center of curvature of the second constant-speed section are located on the same side of the first chute.

[0027] In this implementation manner, the first constant-speed section and the second constant-speed section can be straight line segments, so that the first chute as a whole presents a curved shape mixed with arc segments and straight line segments. Or, the first constant-speed section and the second constant-speed section can also be arc segments, so that the first chute as a whole presents a curved shape with only arc segments.

[0028] In a possible implementation, both the first acceleration section and the second acceleration section are straight sections.

[0029] In this implementation, the first constant-speed section and the second constant-speed section can be straight sections, so that the first sliding groove as a whole presents a broken-line shape with only straight sections. Or, the first constant-speed section and the second constant-speed section can also be arc sections, so that the first sliding groove as a whole presents a curved shape mixed with arc sections and straight sections.

[0030] In a possible implementation, the first acceleration section and the second acceleration section are rotationally symmetric.

[0031] That is to say, the first acceleration section can be obtained by rotating around a certain fixed point through a rotation transformation, and the second acceleration section can be obtained by rotating around the same fixed point through a rotation transformation.

[0032] It should be noted that the embodiments of the present application do not strictly limit the rotation angle required for the first acceleration section to be obtained by rotating the second acceleration section or the second acceleration section to be obtained by rotating the first acceleration section. It can be any angle based on meeting the working requirements of the folding assembly, such as 170°, 180°, etc.

[0033] Therefore, due to the rotationally symmetric setting of the first acceleration section and the second acceleration section, and the rotationally symmetric setting of the first constant-speed section and the second constant-speed section, the first section and the second section are rotationally symmetric. That is to say, the first section can be obtained by rotating around a certain fixed point through a rotation transformation, and the second section can be obtained by rotating around the same fixed point through a rotation transformation. By splitting the structure of the first sliding groove into two sections, due to the rotationally symmetric setting of the first section and the second section, the speed stages of the first shaft body sliding in the first sliding groove can present a symmetric setting. The symmetric speed stages are beneficial to extending the hoverable stage of the folding assembly.

[0034] It should be noted that the embodiments of the present application do not strictly limit the rotation angle required for the first section to be obtained by rotating the second section or the second section to be obtained by rotating the first section. It can be any angle based on meeting the working requirements of the folding assembly, such as 170°, 180°, etc.

[0035] In a possible implementation, the centers of curvature of the first constant-speed section and the second constant-speed section are respectively located on both sides of the first sliding groove.

[0036] Among them, the center of curvature of the first flat-speed segment and the center of curvature of the second flat-speed segment are respectively located on both sides of the first sliding groove, which can be understood as that the center of curvature of the first flat-speed segment and the center of curvature of the second flat-speed segment are, based on the first sliding groove as a reference, one located on one side of the first sliding groove and the other located on the opposite side of the first sliding groove. Under this setting, the first flat-speed segment and the second flat-speed segment can jointly form curved segments of different shapes (such as wavy, S-shaped, etc.) according to the different rotation angles between the first flat-speed segment and the second flat-speed segment, with strong flexibility.

[0037] In a possible implementation manner, the center of curvature of the first flat-speed segment and the center of curvature of the first acceleration segment are located on the same side of the first sliding groove, and the center of curvature of the second flat-speed segment and the center of curvature of the second acceleration segment are located on the same side of the first sliding groove.

[0038] In a possible implementation manner, both the first flat-speed segment and the second flat-speed segment are straight line segments.

[0039] Under this setting, the first flat-speed segment and the second flat-speed segment can jointly form a straight line segment shape or a broken line segment shape according to the different rotation angles between the first flat-speed segment and the second flat-speed segment, with strong flexibility.

[0040] In a possible implementation manner, the folding assembly further includes a first rotating shaft, the first rotating shaft penetrates through the second end, and the damping assembly includes a first cam structure, a second cam structure, a first elastic member, and a limiting member;

[0041] The first cam structure is fixed to the second end and sleeved on the first rotating shaft, the second cam structure is sleeved on the first rotating shaft and in contact with the first cam structure, the limiting member is fixed to the first rotating shaft, the first elastic member abuts between the second cam structure and the limiting member, and the second cam structure can move along the first rotating shaft under the push of the first cam structure to compress or release the first elastic member.

[0042] It can be understood that since the first cam structure cannot move axially along the first rotating shaft and only the second cam structure has axial movement space, and because the first cam structure and the second cam structure are always in good cooperative contact. Therefore, when the first cam structure rotates, the second cam structure is pushed by the first cam structure to move axially along the first rotating shaft, compressing or releasing the compression of the first elastic member, improving the damping effect and the user experience during folding.

[0043] During the rotation of the first torsion swing arm relative to the base, the first cam structure provided at its second end will have relative movement with the second cam structure. The relative movement can be understood as the second cam structure being squeezed and sliding relative to the first cam structure, causing the axial distance between the two to change, thereby compressing the first elastic member. The first elastic member squeezes the first cam structure through the second cam structure, thereby generating resistance to the rotation of the first cam structure and forming a damping force. When the damping force brought by the first elastic member can prevent the first torsion swing arm and the second torsion swing arm from freely rotating under the action of gravity, the first torsion swing arm can stop at any angle, and thus the folding assembly can hover at any angle.

[0044] In a second aspect, the present application further provides a folding assembly, which includes:

[0045] A first main swing arm, on which a first sliding groove is provided. The first sliding groove includes a first acceleration section and a first constant-speed section connected to each other. The absolute value of the slope of the first acceleration section is greater than the absolute value of the slope of the first constant-speed section;

[0046] A first torsion swing arm, which includes a first end and a second end;

[0047] A first shaft body, which passes through the first end and the first sliding groove. The first shaft body connects the first torsion swing arm and the first main swing arm, and the first shaft body can slide in the first sliding groove;

[0048] A first rotating shaft, which is disposed through the second end; and

[0049] A damping assembly, including a first cam structure, a second cam structure, a first elastic member and a limiting member. The first cam structure is fixed to the second end and sleeved on the first rotating shaft. The second cam structure is sleeved on the first rotating shaft and contacts the first cam structure. The first elastic member elastically abuts between the second cam structure and the limiting member. The second cam structure can move along the first rotating shaft under the push of the first cam structure to compress or release the first elastic member.

[0050] In a possible implementation manner, the first sliding groove further includes a second constant-speed section and a second acceleration section. One end of the second constant-speed section is connected to the first constant-speed section, and the other end of the second constant-speed section is connected to the second acceleration section. The absolute value of the slope of the second acceleration section is greater than the absolute value of the slope of the second constant-speed section, and the second constant-speed section is rotationally symmetric with the first constant-speed section.

[0051] In a possible implementation manner, the centers of curvature of the first acceleration section and the second acceleration section are respectively located on both sides of the first sliding groove.

[0052] In a third aspect, the present application also provides an electronic device, which includes a flexible display screen and the folding assembly as described above, and the flexible display screen is carried on the folding assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is a schematic structural diagram of the electronic device provided by an embodiment of the present application when in a folded state;

[0054] Figure 2 is Figure 1 a schematic structural diagram of the electronic device shown when in an intermediate state;

[0055] Figure 3 is Figure 1 a schematic structural diagram of the electronic device shown when in an unfolded state;

[0056] Figure 4 is a schematic structural diagram of the electronic device provided by an embodiment of the present application;

[0057] Figure 5 is Figure 4 an exploded schematic diagram of the electronic device shown;

[0058] Figure 6 is Figure 5 a partial structural schematic diagram of the folding assembly shown;

[0059] Figure 7 is Figure 6 an exploded partial structural schematic diagram of the folding assembly shown;

[0060] Figure 8 is a partial structural schematic diagram of a cam;

[0061] Figure 9 is Figure 7 a schematic structural diagram of the folding assembly shown when in an unfolded state;

[0062] Figure 10 is Figure 7 a schematic structural diagram of the folding assembly shown when in an intermediate state;

[0063] Figure 11 is Figure 7 a schematic structural diagram of the folding assembly shown when in another intermediate state;

[0064] Figure 12 is Figure 7 a schematic structural diagram of a first sliding groove of the folding assembly shown;

[0065] Figure 13 is Figure 7 another schematic structural diagram of a first sliding groove of the folding assembly shown;

[0066] Figure 14 is Figure 7 Another schematic structural diagram of the first sliding groove of the folding assembly shown;

[0067] Figure 15 is Figure 7 Another schematic structural diagram of the first sliding groove of the folding assembly shown;

[0068] Figure 16 is Figure 7 Corresponding relationship diagram of the climbing path of the first sliding end and the moving path of the first shaft body shown;

[0069] Figure 17 is Figure 7 Schematic diagram of the shape deformation of the first sliding groove shown;

[0070] Figure 18 is Figure 7 A schematic structural diagram of the second sliding groove of the folding assembly shown;

[0071] Figure 19 is Figure 7 Another schematic structural diagram of the second sliding groove of the folding assembly shown;

[0072] Figure 20 is Figure 7 Another schematic structural diagram of the second sliding groove of the folding assembly shown;

[0073] Figure 21 is Figure 7 Another schematic structural diagram of the second sliding groove of the folding assembly shown;

[0074] Figure 22 is Figure 7 Corresponding relationship diagram of the climbing path of the second sliding end and the moving path of the second shaft body shown;

[0075] Figure 23 is Figure 7 Schematic diagram of the shape deformation of the second sliding groove shown. Detailed implementation manners

[0076] For ease of understanding, first, the terms involved in the embodiments of the present application are explained.

[0077] And / or: It is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. These three situations.

[0078] Multiple: It means two or more than two.

[0079] Connection: It should be understood in a broad sense. For example, when A is connected to B, it can be a direct connection between A and B, or an indirect connection between A and B through an intermediate medium.

[0080] Next, the specific embodiments of the present application will be clearly described with reference to the accompanying drawings.

[0081] An embodiment of the present application provides a folding assembly and an electronic device using the folding assembly.

[0082] Among them, the electronic device can be a device with foldable performance, which can be unfolded and closed under the operation of the user. In the embodiments of the present application, for the convenience of understanding, a mobile phone, an electronic device with a wide range of users and rich application scenarios, will be taken as an example for illustration, but it is not limited thereto.

[0083] Figure 1 is a schematic structural diagram of the electronic device 200 provided by the embodiment of the present application when in a folded state. Figure 2 is Figure 1 a schematic structural diagram of the electronic device 200 shown when in an intermediate state, where the unfolding angle α of the electronic device 200 is 120°, and α can also be other angles. Figure 3 is Figure 1 a schematic structural diagram of the electronic device 200 shown when in an unfolded state, where the unfolding angle β of the electronic device 200 is 180°, and β can also be other angles.

[0084] It should be noted that slight deviations are allowed for the angles exemplified above. For example, Figure 3 when it is stated that the unfolding angle α of the electronic device 200 shown is 120°, it means that α can be 120°, or approximately 120°, such as 115° or 125°, etc. Figure 4 when it is stated that the unfolding angle β of the electronic device 200 shown is 180°, it means that β can be 180°, or approximately 180°, such as 185° or 190°, etc.

[0085] As Figures 1 - 3 shown, the left and right parts of the electronic device 200 can rotate left and right, so that the electronic device 200 can be folded and unfolded. The folding and unfolding of the electronic device 200 affect the width dimension of the electronic device 200. It should be understood that it is not limited to Figures 1 - 3 shown. The electronic device 200 can also be divided into upper and lower parts, and the upper and lower parts can rotate up and down, so that the electronic device 200 can be folded and unfolded. The folding and unfolding of the electronic device 200 affect the length dimension of the electronic device 200, which will not be elaborated here.

[0086] Figure 4 is a schematic structural diagram of the electronic device 200 provided by the embodiment of the present application.Figure 5 Yes Figure 4 is an exploded view of the electronic device 200 shown. Please refer to Figure 4 and Figure 5 , the electronic device 200 includes a flexible display screen 210, a first housing 220, a second housing 230, and a folding assembly 100.

[0087] It should be noted that Figure 4 and Figure 5 are only intended to schematically describe the connection relationship of the flexible display screen 210, the first housing 220, the second housing 230, and the folding assembly 100, and do not specifically limit the connection positions, specific structures, and quantities of each device. The structure schematically shown in the embodiments of the present application does not constitute a specific limitation on the electronic device 200. In other embodiments of the present application, the electronic device 200 may include more or fewer components than shown, or combine certain components, or split certain components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0088] The first housing 220 and the second housing 230 may be independent housing structures that can jointly carry the flexible display screen 210. The first housing 220 is provided with a first installation groove 240, and the second housing 230 is provided with a second installation groove 250. The first installation groove 240 and the second installation groove 250 communicate to form an installation groove. The folding assembly 100 is installed in the installation groove and fixedly connected to the first housing 220 and the second housing 230 to achieve a rotational connection between the first housing 220 and the second housing 230. The first housing 220 and the second housing 230 can rotate relative to each other through the folding assembly 100, so that the folding assembly 100 can be switched between a folded state and an unfolded state. The first housing 220 and the second housing 230 are also provided with accommodation grooves (not shown in the figure), and the accommodation grooves are used to accommodate electronic components such as the processor, circuit board, and camera module of the electronic device 200, as well as structural components.

[0089] The folding assembly 100 is connected between the first housing 220 and the second housing 230. The folding assembly 100 can relatively unfold the first housing 220 and the second housing 230 to the unfolded state, or relatively fold the first housing 220 and the second housing 230 to the closed state, or make the first housing 220 and the second housing 230 in an intermediate state between the unfolded state and the closed state, so as to achieve the foldable performance of the electronic device 200.

[0090] The flexible display screen 210 is carried on the first housing 220, the second housing 230 and the folding assembly 100, and can be used to display information and provide an interactive interface for users. The flexible display screen 210 can be unfolded as the first housing 220 and the second housing 230 are relatively unfolded, and can be folded as the first housing 220 and the second housing 230 are relatively folded. Exemplarily, the flexible display screen 210 can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a micro organic light-emitting diode display screen, or a quantum dot light-emitting diodes (QLED) display screen. The flexible display screen 210 can be fixed to the first housing 220, the second housing 230 and the folding assembly 100 by means of dispensing.

[0091] Specifically, the first housing 220 and the second housing 230 can be relatively unfolded to an unfolded state, so that the electronic device 200 is in an unfolded state. When the electronic device 200 is in the unfolded state, the flexible display screen 210 is unfolded and in an unfolded state, and can expand the display area of the electronic device 200. At this time, the flexible display screen 210 can perform full-screen display, so the electronic device 200 has a large display area, can present the effect of large-screen display, and improves the user experience. Exemplarily, when the first housing 220 and the second housing 230 are in the unfolded state, the included angle between them can be set to be approximately 180° (a small deviation is also allowed, such as 175°, 178° or 185°).

[0092] The first housing 220 and the second housing 230 can also be relatively folded to a folded state, so that the electronic device 200 is in a folded state. When the electronic device 200 is in the folded state, the planar size of the electronic device 200 is small, which is convenient for users to store and carry. Exemplarily, when the first housing 220 and the second housing 230 are in the closed state, they can be completely closed and parallel to each other (a small deviation is also allowed).

[0093] The first housing 220 and the second housing 230 can also rotate relative to each other to approach each other (fold) or move away from each other (unfold) to an intermediate state, so that the electronic device 200 is in the intermediate state. Herein, the intermediate state can be any state between the unfolded state and the closed state. For example, when the first housing 220 and the second housing 230 are in the intermediate state, the included angle between them can be 135°, 90°, or 45°.

[0094] Exemplarily, the electronic device 200 can adopt the folding assembly 100 to realize the inward folding of the flexible display screen 210. At this time, the flexible display screen 210 can be clamped between the first housing 220 and the second housing 230, that is, the flexible display screen 210 can be located inside the first housing 220 and the second housing 230 and present a state of being wrapped by the first housing 220 and the second housing 230. Or, the electronic device 200 can adopt the folding assembly 100 to realize the outward folding of the flexible display screen 210. At this time, the flexible display screen 210 can be used as the appearance structure of the electronic device 200 and be exposed to the outside. That is to say, the flexible display screen 210 can be located outside the first housing 220 and the second housing 230 and present a state of wrapping the first housing 220 and the second housing 230.

[0095] It should be noted that when the electronic device 200 is in the unfolded state, the folding assembly 100 is also in the unfolded state. When the electronic device 200 is in the intermediate state, the folding assembly 100 is also in the intermediate state. When the electronic device 200 is in the folded state, the folding assembly 100 is also in the folded state.

[0096] Thus, the first housing 220 and the second housing 230 can be relatively unfolded and relatively closed through the folding assembly 100, so that the electronic device 200 can be switched between the unfolded state and the closed state.

[0097] Figure 6 Yes Figure 5 A partial structural schematic diagram of a part of the folding assembly 100 shown Figure 7 Yes Figure 6 A partial exploded structural schematic diagram of the folding assembly 100 shown

[0098] Please refer to Figure 6 and Figure 7 , the folding assembly 100 includes a first main swing arm 10, a first shaft body 21, a first torsion swing arm 30, a first rotating shaft 41, a second main swing arm 50, a second shaft body 22, a second torsion swing arm 60, a second rotating shaft 42, a synchronization mechanism 70, a damping assembly 80, and a base 90.

[0099] Exemplarily, the first main swing arm 10 and the second main swing arm 50 are symmetrically distributed on both sides of the base 90, the first torsion swing arm 30 and the second torsion swing arm 60 are symmetrically distributed on both sides of the base 90, and the first housing 220 and the second housing 230 are symmetrically distributed on both sides of the base 90. However, it should be understood that the symmetrical distribution refers to the symmetrical distribution in position, rather than the complete same shape and structure of the two main swing arms, the two torsion swing arms and the two housings. The structures of the two main swing arms, the two torsion swing arms and the two housings can be the same or different, and the embodiments of the present application do not strictly limit this.

[0100] The base 90 can maintain a stationary state during the relative folding and relative unfolding of the first main swing arm 10 and the second main swing arm 50. In other words, during the relative folding and relative unfolding of the first main swing arm 10 and the second main swing arm 50, the base 90 can maintain its own position unchanged, that is, the base 90 is relatively stationary, while the first main swing arm 10 and the second main swing arm 50 can both rotate relative to the base 90.

[0101] The base 90 has a receiving space 91, and the receiving space 91 can be used to receive at least part of the components of the folding assembly 100 and other structures in the electronic device 200. For example, the synchronization mechanism 70 and the damping assembly 80 can be arranged in the receiving space 91 of the base 90, and the base 90 can be used to receive the synchronization mechanism 70 and the damping assembly 80.

[0102] The first main swing arm 10 is connected to the first housing 220 and can move together with the first housing 220. That is to say, when the first main swing arm 10 rotates relative to the base 90, the first housing 220 will be driven to rotate synchronously relative to the base 90. When the first housing 220 rotates relative to the base 90, the first main swing arm 10 will be driven to rotate synchronously relative to the base 90. The first main swing arm 10 is provided with a first sliding groove 11, and the first sliding groove 11 can allow the first shaft body 21 to slide therein.

[0103] The first shaft body 21 passes through the first torsion swing arm 30, and both ends of the first shaft body 21 extend out of the first torsion swing arm 30. Among them, one end of the first shaft body 21 extending out of the first torsion swing arm 30 is slidably connected to the first sliding groove 11. Thus, the first torsion swing arm 30 can be connected to the first main swing arm 10 through the first shaft body 21, and the first torsion swing arm 30 and the first main swing arm 10 are linked by the sliding of the first shaft body 21 in the first sliding groove 11. That is to say, when the first torsion swing arm 30 rotates relative to the base 90, the first main swing arm 10 will be driven to rotate synchronously relative to the base 90. Or, when the first main swing arm 10 rotates relative to the base 90, the first torsion swing arm 30 will be driven to rotate synchronously relative to the base 90.

[0104] The first torsion swing arm 30 includes a first end 31 and a second end 32. The first end 31 of the first torsion swing arm 30 is the end where the first torsion swing arm 30 is connected to the first main swing arm 10, and the second end 32 of the first torsion swing arm 30 is the end where the first torsion swing arm 30 is connected to the first rotating shaft 41, the synchronization mechanism 70, and the damping component 80. Specifically, a first through hole 33 through which the first shaft body 21 can pass may be provided at the first end 31 of the first torsion swing arm 30, and the aperture size of the first through hole 33 may be adapted to the outer diameter size of the first shaft body 21 for the first shaft body 21 to pass through. That is to say, the first shaft body 21 passes through the first end 31 to connect the first torsion swing arm 30 and the first main swing arm 10 with the first sliding groove 11. A second through hole 34 through which the first rotating shaft 41 can pass may be provided at the second end 32 of the first torsion swing arm 30, and the aperture size of the second through hole 34 may be adapted to the outer diameter size of the first rotating shaft 41 for the first rotating shaft 41 to pass through.

[0105] The first rotating shaft 41 passes through the second end 32 of the first torsion swing arm 30. The first rotating shaft 41 has a first axis 411, and the first axis 411 is the rotation center of the first rotating shaft 41. The first rotating shaft 41 can rotate about the first axis 411. The first rotating shaft 41 can rotate synchronously with the first torsion swing arm 30. That is to say, the first rotating shaft 41 can drive the first torsion swing arm 30 to rotate together through its own rotational motion during the rotational process of rotating about the first axis 411. And because the first torsion swing arm 30 is linked with the first main swing arm 10 through the first shaft body 21, the first torsion swing arm 30 can drive the first main swing arm 10 to rotate. Both ends of the first rotating shaft 41 extend out of the first torsion swing arm 30. Among them, one end of the first rotating shaft 41 extending out of the first torsion swing arm 30 is connected to the synchronization mechanism 70, and the other end of the first rotating shaft 41 extending out of the first torsion swing arm 30 is connected to the damping component 80.

[0106] The second main swing arm 50 is connected to the second housing 230 and can move together with the second housing 230. That is to say, when the second main swing arm 50 rotates relative to the base 90, the second housing 230 will be driven to rotate synchronously relative to the base 90. When the second housing 230 rotates relative to the base 90, the second main swing arm 50 will be driven to rotate synchronously relative to the base 90. A second sliding groove 51 is provided on the second main swing arm 50, and the second sliding groove 51 can allow the second shaft body 22 to slide therein.

[0107] The second shaft body 22 is passed through the second torsion swing arm 60, and both ends of the second shaft body 22 extend out of the second torsion swing arm 60. Among them, one end of the second shaft body 22 extending out of the second torsion swing arm 60 is slidably connected to the second chute 51. Thus, the second torsion swing arm 60 can be connected to the second main swing arm 50 through the second shaft body 22, and the second torsion swing arm 60 and the second main swing arm 50 are linked by the sliding of the second shaft body 22 in the second chute 51. That is to say, when the second torsion swing arm 60 rotates relative to the base 90, the second main swing arm 50 will be driven to rotate synchronously relative to the base 90. Or, when the second main swing arm 50 rotates relative to the base 90, the second torsion swing arm 60 will be driven to rotate synchronously relative to the base 90.

[0108] The second torsion swing arm 60 includes a third end 61 and a fourth end 62. The third end 61 of the second torsion swing arm 60 is the end where the second torsion swing arm 60 is connected to the second main swing arm 50, and the fourth end 62 of the second torsion swing arm 60 is the end where the second torsion swing arm 60 is connected to the second rotating shaft 42, the synchronization mechanism 70, and the damping assembly 80. Specifically, a third through hole 63 through which the second shaft body 22 can pass may be provided at the third end 61 of the second torsion swing arm 60, and the aperture size of the third through hole 63 may be adapted to the outer diameter size of the second shaft body 22 for the second shaft body 22 to pass through it. That is to say, the second shaft body 22 passes through the third end 61 and is connected to the second chute 51 to connect the second torsion swing arm 60 and the second main swing arm 50. A fourth through hole 64 through which the second rotating shaft 42 can pass may be provided at the fourth end 62 of the second torsion swing arm 60, and the aperture size of the fourth through hole 64 may be adapted to the outer diameter size of the second rotating shaft 42 for the second rotating shaft 42 to pass through it.

[0109] The second rotating shaft 42 is passed through the fourth end 62 of the second torsion swing arm 60. The second rotating shaft 42 has a second axis 421, and the second axis 421 is the rotation center of the second rotating shaft 42. The second rotating shaft 42 can rotate around the second axis 421. The second rotating shaft 42 can rotate synchronously with the second torsion swing arm 60. That is to say, the second rotating shaft 42 can drive the second torsion swing arm 60 to rotate together through its own rotational movement during the rotational process of rotating around the second axis 421. And because the second torsion swing arm 60 is linked to the second main swing arm 50 through the second shaft body 22, the second torsion swing arm 60 can drive the second main swing arm 50 to rotate. Both ends of the second rotating shaft 42 extend out of the second torsion swing arm 60. Among them, one end of the second rotating shaft 42 extending out of the second torsion swing arm 60 is connected to the synchronization mechanism 70, and the other end of the second rotating shaft 42 extending out of the second torsion swing arm 60 is connected to the damping assembly 80.

[0110] Please refer to Figure 6 and Figure 7, the synchronization mechanism 70 may include a first rotating gear 71, a second rotating gear 72, a first synchronization gear 73, and a second synchronization gear 74. The first rotating gear 71 is provided at one end of the first rotating shaft 41. The first rotating shaft 41 and the first rotating gear 71 can form a gear shaft structure, so that the first rotating shaft 41 and the first rotating gear 71 can rotate synchronously. The second rotating gear 72 is provided at one end of the second rotating shaft 42. The second rotating shaft 42 and the second rotating gear 72 can also form a gear shaft structure, so that the second rotating shaft 42 and the second rotating gear 72 can rotate synchronously. The first synchronization gear 73 meshes with the first rotating gear 71, the second synchronization gear 74 meshes with the second rotating gear 72, and the first synchronization gear 73 and the second synchronization gear 74 mesh with each other. Thus, due to the meshing relationship between the two, when one rotates, the other can also rotate synchronously, thereby realizing the opening and closing of the first torsion swing arm 30 and the second torsion swing arm 60, that is, realizing the opening and closing of the first main swing arm 10 and the second main swing arm 50, and also realizing the opening and closing of the electronic device 200.

[0111] The damping assembly 80 and the synchronization mechanism 70 can be respectively arranged on both sides of the first torsion swing arm 30 and the second torsion swing arm 60 to avoid interference between the two. The damping assembly 80 can enable the first torsion swing arm 30 and the second torsion swing arm 60 to stay at a certain angle after rotating to that angle, and further can assist in fixing and maintaining the angles of the first main swing arm 10 and the second main swing arm 50. In other words, the damping assembly 80 can achieve a slow-down effect when the two shells (the first shell 220 and the second shell 230) flip relative to each other, that is, the electronic device 200 can be positioned at any angle according to the usage requirements during the folding or unfolding process.

[0112] The damping assembly 80 has a first resistance state, a second resistance state, and a third resistance state. When the damping assembly 80 is in the first resistance state and the third resistance state, the first torsion swing arm 30 and the second torsion swing arm 60 can rotate relatively freely. When the damping assembly 80 is in the second resistance state, the first torsion swing arm 30 and the second torsion swing arm 60 can rotate to a certain angle and then stay at that angle.

[0113] Among them, the rotational resistance of the damping assembly 80 to the first torsion swing arm 30 and the second torsion swing arm 60 in the second resistance state is greater than the rotational resistance of the damping assembly 80 to the first torsion swing arm 30 and the second torsion swing arm 60 in the first resistance state. The rotational resistance of the damping assembly 80 to the first torsion swing arm 30 and the second torsion swing arm 60 in the third resistance state is greater than the rotational resistance of the damping assembly 80 to the first torsion swing arm and the second torsion swing arm in the first resistance state.

[0114] The damping assembly 80 may include a first cam structure 81, a third cam structure 82, a slider 83, a first elastic member 84, a second elastic member 85, and a stopper 86.

[0115] Please refer to Figure 6 and Figure 7 , the first cam structure 81 is disposed at the second end 32 of the first torsion swing arm 30. The first cam structure 81 has a hollow structure, and the first cam structure 81 is sleeved on the first rotating shaft 41 through the hollow structure. The first cam structure 81 includes a plurality of first convex portions 811 and a plurality of first concave portions 812, and each adjacent two first convex portions 811 are connected by a first concave portion 812, so that the first cam structure 81 can present an uneven undulating shape. Exemplarily, the first convex portion 811 may present a nearly trapezoidal shape.

[0116] The third cam structure 82 is disposed at the fourth end 62 of the second torsion swing arm 60. The third cam structure 82 has a hollow structure, and the third cam structure 82 is sleeved on the second rotating shaft 42 through the hollow structure. The third cam structure 82 includes a plurality of third convex portions 821 and a plurality of third concave portions 822, and each adjacent two third convex portions 821 are connected by a third concave portion 822, so that the sliding cam can present an uneven undulating shape. Exemplarily, the third convex portion 821 may present a nearly trapezoidal shape.

[0117] The slider 83 is slidably connected to the first rotating shaft 41 and the second rotating shaft 42, that is, the slider 83 can slide relative to the first rotating shaft 41 and the second rotating shaft 42. In other words, the slider 83 can move along the axial direction of the first rotating shaft 41 on the first rotating shaft 41, and can also move along the axial direction of the second rotating shaft 42 on the second rotating shaft 42. The slider 83 includes a second cam structure 831, a fourth cam structure 832, and a first connecting portion 833.

[0118] The second cam structure 831 has a hollow structure and is sleeved on the first rotating shaft 41 through the hollow structure, and the second cam structure 831 can move along the axial direction of the first rotating shaft 41 on the first rotating shaft 41. That is, the second cam structure 831 is slidably connected to the first rotating shaft 41. On the side of the second cam structure 831 facing the first torsion swing arm 30, there are provided a plurality of second convex portions 834 and a plurality of second concave portions 835, and each adjacent two second convex portions 834 are connected by a second concave portion 835, so that the second cam structure 831 of the slider 83 can present an uneven undulating shape.

[0119] It can be understood that the second cam structure 831 is always in pressing contact with the first cam structure 81. The contact between the two can include the contact between the first convex portion 811 of the first cam structure 81 and the second concave portion 835 of the second cam structure 831, and the contact between the first concave portion 812 of the first cam structure 81 and the second convex portion 834 of the second cam structure 831, similar to the meshing between teeth. It can also include the contact between the first convex portion 811 of the first cam structure 81 and the second convex portion 834 of the second cam structure 831.

[0120] The fourth cam structure 832 has a hollow structure and is sleeved on the second rotating shaft 42 through the hollow structure. Moreover, the fourth cam structure 832 can move along the axial direction of the second rotating shaft 42 on the second rotating shaft 42. That is to say, the fourth cam structure 832 is slidably connected to the second rotating shaft 42. On the side of the fourth cam structure 832 facing the second torsion swing arm 60, there are provided a plurality of fourth convex portions 836 and a plurality of fourth concave portions 837. Each adjacent two fourth convex portions 836 are connected by a fourth concave portion 837, so that the fourth cam structure 832 of the sliding member 83 can present an uneven undulating shape.

[0121] It can be understood that the fourth cam structure 832 is always in pressing contact with the third cam structure 82. The contact between the two can include the contact between the third convex portion 821 of the third cam structure 82 and the fourth concave portion 837 of the fourth cam structure 832, and the contact between the third concave portion 822 of the third cam structure 82 and the fourth convex portion 836 of the fourth cam structure 832, similar to the meshing between teeth. It can also include the contact between the third convex portion 821 of the third cam structure 82 and the fourth convex portion 836 of the fourth cam structure 832.

[0122] The first connecting portion 833 is connected between the second cam structure 831 and the fourth cam structure 832 and is located in the gap region between the first rotating shaft 41 and the second rotating shaft 42, and can connect the movements of the second cam structure 831 and the fourth cam structure 832 in series, so that the second cam structure 831 and the fourth cam structure 832 move together.

[0123] The first elastic member 84 is sleeved on the first rotating shaft 41 and abuts against the second cam structure 831 of the sliding member 83. Exemplarily, the first elastic member 84 can be an elastic body such as a spring or a disc spring group having an elastic restoring force. Thus, due to the good elastic force of the first elastic member 84, the second cam structure 831 can be pushed to make the second cam structure 831 in pressing contact with the first cam structure 81, ensuring the damping effect that can be achieved by the first cam structure 81 and the second cam structure 831.

[0124] It can be understood that since the first cam structure 81 cannot move axially along the first rotating shaft 41, only the second cam structure 831 has axial movement space, and because the first cam structure 81 and the second cam structure 831 are always in good mating contact. Therefore, when the first cam structure 81 rotates, the second cam structure 831 is pushed by the first cam structure 81 to move axially along the first rotating shaft 41, compressing or releasing the first elastic member 84, improving the damping effect and the user experience during folding.

[0125] During the rotation of the first torsion swing arm 30 relative to the base 90, the first cam structure 81 provided at its second end 32 will have relative movement with the second cam structure 831 of the sliding member 83. The relative movement can be understood as the second cam structure 831 being squeezed and sliding relative to the first cam structure 81, changing the axial distance between the two, and then compressing the first elastic member 84. The first elastic member 84 squeezes the first cam structure 81 through the second cam structure 831, and then generates resistance to the rotation of the first cam structure 81, forming a damping force. When the damping force brought by the first elastic member 84 can prevent the first torsion swing arm 30 and the second torsion swing arm 60 from freely rotating under the action of gravity, the first torsion swing arm 30 can stop at any angle, and then the electronic device 200 can hover at any angle.

[0126] The cooperation between the first concave portion 812 and the second convex portion 834 can be used to achieve the effect of jamming and positioning at a specific angle. For example, by designing the starting position and the ending position of the first concave portion 812 and the second convex portion 834, when at the starting position and the ending position, the second cam structure 831 slides along the first rotating shaft 41, so that the extrusion of the second cam structure 831 on the first cam structure 81 suddenly decreases, thus being able to provide clear and timely feedback to the user. For example, when the angle between the first housing 220 and the second housing 230 is 30°, 60°, 90°, or 120° and other different angles, a clear and timely sense of pause can be provided to the user.

[0127] The second elastic member 85 is sleeved on the second rotating shaft 42 and abuts against the fourth cam structure 832 of the sliding member 83. Exemplarily, the second elastic member 85 can be an elastic body such as a spring or a disc spring group with elastic restoring force. Thus, due to the good elastic force of the second elastic member 85, the fourth cam structure 832 can be pushed to make the fourth cam structure 832 press against the third cam structure 82, ensuring the damping effect that the third cam structure 82 and the fourth cam structure 832 can achieve.

[0128] It can be understood that since the third cam structure 82 cannot move axially along the second rotating shaft 42, only the fourth cam structure 832 has axial movement space, and because the third cam structure 82 and the fourth cam structure 832 are always in good mating contact. Therefore, when the third cam structure 82 rotates, the fourth cam structure 832 is pushed by the third cam structure 82 to move axially along the second rotating shaft 42, compressing or releasing the second elastic member 85, improving the damping effect and enhancing the user experience during folding.

[0129] During the rotation of the second torsion swing arm 60 relative to the base 90, the third cam structure 82 provided at its fourth end 62 will have relative movement with the fourth cam structure 832 of the slider 83. The relative movement can be understood as the fourth cam structure 832 being squeezed and sliding relative to the third cam structure 82, causing the axial distance between the two to change, and then compressing the second elastic member 85. The second elastic member 85 squeezes the third cam structure 82 through the fourth cam structure 832, and then generates resistance to the rotation of the third cam structure 82, forming a damping force. When the damping force brought by the second elastic member 85 can prevent the first torsion swing arm 30 and the second torsion swing arm 60 from freely rotating under the action of gravity, the second torsion swing arm 60 can stop at any angle, and then the electronic device 200 can hover at any angle.

[0130] The cooperation between the third convex portion 821 and the fourth convex portion 836 can be used to achieve the effect of jamming and positioning at a specific angle. For example, by designing the starting position and the ending position of the third convex portion 821 and the fourth convex portion 836, when at the starting position and the ending position, the fourth cam structure 832 slides along the second rotating shaft 42, so that the extrusion of the fourth cam structure 832 on the third cam structure 82 suddenly decreases, thus being able to provide clear and timely feedback to the user. For example, when the angle between the first housing 220 and the second housing 230 is 30°, 60°, 90°, or 120° and other different angles, a clear and timely sense of pause can be provided to the user.

[0131] Please refer to Figure 6 and Figure 7, the limiting member 86 includes a first limiting end 861, a second limiting end 862, and a second connecting portion 863. The first limiting end 861 has a hollow structure and is sleeved and fixed to the first rotating shaft 41, so that the first elastic member 84 is elastically abutted between the second cam structure 831 and the first limiting end 861. Thus, by providing the limiting member 86, the movement of the first elastic member 84 in the axial direction of the first rotating shaft 41 can be restricted, effectively preventing the first elastic member 84 from disengaging from the first rotating shaft 41 in the direction away from the sliding member 83, and having good retention stability. Restricting the movement of the first elastic member 84 in the axial direction of the first rotating shaft 41 can restrict the movement of the sliding member 83 in the axial direction of the first rotating shaft 41 through the abutting relationship between the first elastic member 84 and the second cam structure 831 of the sliding member 83, so that the sliding member 83 has an appropriate sliding distance on the first rotating shaft 41.

[0132] The second limiting end 862 has a hollow structure and is sleeved and fixed to the second rotating shaft 42, so that the second elastic member 85 is elastically abutted between the fourth cam structure 832 and the second limiting end 862. Thus, the limiting member 86 can restrict the movement of the second elastic member 85 in the axial direction of the second rotating shaft 42, effectively preventing the second elastic member 85 from disengaging from the second rotating shaft 42 in the direction away from the sliding member 83, and having good retention stability. Restricting the movement of the second elastic member 85 in the axial direction of the second rotating shaft 42 can restrict the movement of the sliding member 83 in the axial direction of the second rotating shaft 42 through the abutting relationship between the second elastic member 85 and the fourth cam structure 832 of the sliding member 83, so that the sliding member 83 has an appropriate sliding distance on the second rotating shaft 42.

[0133] The second connecting portion 863 is connected between the first limiting end 861 and the second limiting end 862 and is located in the gap region between the first rotating shaft 41 and the second rotating shaft 42.

[0134] Based on the above description, it should be understood that during the axial movement of the sliding member 83, the first elastic member 84 and the second elastic member 85 are in a compressed state due to being squeezed by the sliding member 83. Therefore, a relatively large elastic force will be exerted at the end of the first elastic member 84 away from the sliding member 83 and the end of the second elastic member 85 away from the sliding member 83. Thus, by providing the limiting member 86 at this end, the problem of the first elastic member 84 and the second elastic member 85 falling off due to excessive force can be solved due to the good retention stability between the limiting member 86 and the first rotating shaft 41 and the second rotating shaft 42, which is beneficial to ensuring that the synchronous movement of the folding assembly 100 does not deflect and has good reliability.

[0135] It can be understood that in the folding assembly 100, the first torsion swing arm 30, the first cam structure 81, the second cam structure 831 and the first elastic member 84 are coaxially arranged on the first rotating shaft 41. The first cam structure 81 provided on the first torsion swing arm 30 is matched with the second cam structure 831 that can slide on the first rotating shaft 41. When the first torsion swing arm 30 rotates relative to the base, since the second cam structure 831 can be squeezed by the first cam structure 81 on the first torsion swing arm 30, it can compress the first elastic member 84 to generate a damping force. By designing the surface profiles of the first cam structure 81 and the second cam structure 831, the damping force of the folding assembly 100 can be indirectly controlled.

[0136] The second torsion swing arm 60, the third cam structure 82, the fourth cam structure 832 and the second elastic member 85 are coaxially arranged on the second rotating shaft 42. The third cam structure 82 provided on the second torsion swing arm 60 is matched with the fourth cam structure 832 that can slide on the second rotating shaft 42. When the first torsion swing arm rotates relative to the base, since the fourth cam structure 832 can be squeezed by the third cam structure 82 on the second torsion swing arm 60, it can compress the second elastic member 85 to generate a damping force. By designing the surface profiles of the third cam structure 82 and the fourth cam structure 832, the damping force of the folding assembly 100 can be indirectly controlled.

[0137] In the trend of miniaturization of the folding assembly 100, the sizes of the springs (such as the first elastic member 84 and the second elastic member 85) and the cams (such as the first cam structure 81, the third cam structure 82, the second cam structure 831 and the fourth cam structure 832) have decreased significantly, resulting in a smaller damping force provided by them. If we want to ensure that the damping force provided is appropriate, we need to change the surface profile of the cam to increase the climbing amount and the climbing angle of the cam, thereby increasing the damping force. However, changing the surface profile of the cam will lead to a reduction in the working life of the cam, and then cause the folding assembly 100 to fail. Among them, the climbing angle can be understood as Figure 8 the angle θ shown.

[0138] Thus, in the embodiments of the present application, without changing the cam profile and without increasing the cam climbing angle, the differential cooperation between the main swing arms (the first main swing arm 10 and the second main swing arm 50) and the torsion swing arms (the first torsion swing arm 30 and the second torsion swing arm 60) can be used to further expand the hover angle range of the folding assembly 100, which is beneficial to achieving large-angle hovering of the folding assembly 100. For example, the hover angle range of the folding assembly in the prior art is 80°-120°, and in the technical solution of the embodiments of the present application, the hover angle range of the folding assembly 100 can be 30°-150°, and the hover range of the folding assembly 100 is further expanded compared with the hover angle range of the prior art. The differential cooperation between the main swing arm and the torsion swing arm can be understood as the difference in the rotation angles between the main swing arm and the torsion swing arm. For example, originally, when the first main swing arm 10 rotates 1°, the first torsion swing arm 30 also rotates 1°. Under differential cooperation, it can be that the first main swing arm 10 rotates 1° and the first torsion swing arm 30 rotates 2°. The differential cooperation between the main swing arm and the torsion swing arm is achieved by designing the first chute 11 provided on the first main swing arm 10 and the second chute 51 provided on the second main swing arm 50. The specific structures of the first chute 11 and the second chute 51 will be described below.

[0139] Figure 9 Yes Figure 7 is a schematic structural diagram of the folding assembly 100 shown in the unfolded state. Figure 10 Yes Figure 7 is a schematic structural diagram of the folding assembly 100 shown in an intermediate state. Figure 11 Yes Figure 7 is a schematic structural diagram of the folding assembly 100 shown in another intermediate state. Wherein, the length direction of the folding assembly 100 is defined as the first direction, and the first direction is identified by X. The height direction of the folding assembly 100 is the second direction, and the second direction is identified by Z, and the first direction X is perpendicular to the second direction Z. It should be noted that the first direction X can be equivalent to the length direction of the electronic device 200, and the second direction Z can be equivalent to the height direction of the electronic device 200.

[0140] Please refer to Figure 9 , Figure 10 and Figure 11 . As the first main swing arm 10 and the second main swing arm 50 are folded relative to each other, the angle between the first main swing arm 10 and the second main swing arm 50 continuously decreases. The first shaft body 21 slides continuously in the first chute 11 to drive the first torsion swing arm 30 to rotate together with the first main swing arm 10, and the second shaft body 22 slides continuously in the second chute 51 to drive the second torsion swing arm 60 to rotate together with the second main swing arm 50, so that the first torsion swing arm 30 and the second torsion swing arm 60 are also folded relative to each other.

[0141] As shown Figure 9 in the figure, the first chute 11 includes a first section 111 and a second section 112. The first section 111 includes a first acceleration section 113 and a first constant-speed section 114. The first acceleration section 113 and the first constant-speed section 114 are bent and connected. The bent connection can be understood as that the first acceleration section 113 and the first constant-speed section 114 are arranged at an angle, and the angle can be within the range of 0°-180°. The absolute value of the slope of the first acceleration section 113 is greater than the absolute value of the slope of the first constant-speed section 114. And the fact that the absolute value of the slope of the first acceleration section 113 is greater than the absolute value of the slope of the first constant-speed section 114 can be understood as that the absolute value of the slope at any position on the first acceleration section 113 is greater than the absolute value of the slope at any position on the first constant-speed section 114.

[0142] Wherein, taking the first direction X as the abscissa x-axis and the second direction Z as the ordinate to establish a coordinate system, the flexible display screen 210 when the folding assembly 100 is in the unfolded state can be parallel to the x-axis. The slope of the first acceleration section 113 represents the inclination degree of the first acceleration section 113 relative to the x-axis (the first direction X) in the unfolded state of the folding assembly 100. And the slope of the curve or straight line corresponding to the first acceleration section 113 has positive and negative values, and the absolute value of the slope of the first acceleration section 113 is a positive value. The slope of the first constant-speed section 114 represents the inclination degree of the first constant-speed section 114 relative to the x-axis (the first direction X) in the unfolded state of the folding assembly 100. And the slope of the curve or straight line corresponding to the first constant-speed section 114 has positive and negative values, and the absolute value of the slope of the first constant-speed section 114 is a positive value. Exemplarily, the first acceleration section 113 and the first constant-speed section 114 can be located in the second quadrant of the coordinate system. The slope of the first acceleration section 113 is a negative value, the slope of the first constant-speed section 114 is a negative value, and the absolute value of the slope of the first acceleration section 113 is greater than the absolute value of the slope of the first constant-speed section 114.

[0143] It can be understood that the first shaft body 21 can slide within the first acceleration section 113 and the first constant-speed section 114, and the sliding speed of the first shaft body 21 within the first acceleration section 113 and the first constant-speed section 114 is related to the absolute value of the slope of the first acceleration section 113 and the first constant-speed section 114. Specifically, when the first shaft body 21 moves in a section with a larger absolute value of the slope, the moving speed of the first shaft body 21 in this section is faster. At this stage, the angle change between the first main swing arm 10 and the second main swing arm 50 can be faster. When the first shaft body 21 moves in a section with a smaller absolute value of the slope, the moving speed of the first shaft body 21 in this section is slower. Therefore, at this stage, the angle change between the first main swing arm 10 and the second main swing arm 50 can be slower. Thus, when the first shaft body 21 moves in the first acceleration section 113, the moving speed of the first shaft body 21 in this section is faster. When the first shaft body 21 moves in the first constant-speed section 114, the moving speed of the first shaft body 21 in this section is slower.

[0144] The second section 112 includes a second acceleration section 116 and a second constant-speed section 115. The second constant-speed section 115 is connected to the first constant-speed section 114. One end of the second constant-speed section 115 away from the first constant-speed section 114 is bent and connected to the second acceleration section 116. The bent connection can be understood as the second acceleration section 116 and the second constant-speed section 115 being arranged at an angle, and the angle can be within the range of 0° - 180°. The absolute value of the slope of the second acceleration section 116 is greater than the absolute value of the slope of the second constant-speed section 115, and the fact that the absolute value of the slope of the second acceleration section 116 is greater than the absolute value of the slope of the second constant-speed section 115 can be understood as the absolute value of the slope at any position on the second acceleration section 116 being greater than the absolute value of the slope at any position on the second constant-speed section 115.

[0145] Wherein, with the first direction X as the abscissa x-axis and the second direction Z as the ordinate to establish a coordinate system, the flexible display screen 210 when the folding assembly 100 is in the unfolded state can be parallel to the x-axis. The slope of the second acceleration section 116 represents the degree of inclination of the second acceleration section 116 relative to the x-axis (the first direction X) in the unfolded state of the folding assembly 100. The slope of the curve or straight line corresponding to the second acceleration section 116 has positive and negative values, and the absolute value of the slope of the second acceleration section 116 is a positive value. The slope of the second constant-speed section 115 represents the degree of inclination of the second constant-speed section 115 relative to the x-axis (the first direction X) in the unfolded state of the folding assembly 100. The slope of the curve or straight line corresponding to the second constant-speed section 115 has positive and negative values, and the absolute value of the slope of the second constant-speed section 115 is a positive value. Exemplarily, the second acceleration section 116 and the second constant-speed section 115 can be located in the fourth quadrant of the coordinate system. The slope of the second acceleration section 116 is negative, the slope of the second constant-speed section 115 is negative, and the absolute value of the slope of the second acceleration section 116 is greater than the absolute value of the slope of the second constant-speed section 115.

[0146] It can be understood that the first shaft body 21 can slide within the second constant-speed section 115 and the second acceleration section 116, and the sliding speed of the first shaft body 21 within the second acceleration section 116 and the second constant-speed section 115 is related to the absolute value of the slope of the second acceleration section 116 and the second constant-speed section 115. Specifically, when the first shaft body 21 moves in a section with a larger absolute value of the slope, the moving speed of the first shaft body 21 in this section is faster. Therefore, at this stage, the change in the angle between the first main swing arm 10 and the second main swing arm 50 can be faster. When the first shaft body 21 moves in a section with a smaller absolute value of the slope, the moving speed of the first shaft body 21 in this section is slower. Therefore, at this stage, the change in the angle between the first main swing arm 10 and the second main swing arm 50 can be slower. Thus, when the first shaft body 21 moves in the second acceleration section 116, the moving speed of the first shaft body 21 in this section is faster. When the first shaft body 21 moves in the second constant-speed section 115, the moving speed of the first shaft body 21 in this section is slower.

[0147] In the embodiment of the present application, the second constant-speed section 115 is rotationally symmetric with the first constant-speed section 114. That is to say, the first constant-speed section 114 can be obtained by rotational transformation around a fixed point to get the second constant-speed section 115, and the second constant-speed section 115 can be obtained by rotational transformation around the same fixed point to get the first constant-speed section 114.

[0148] It should be noted that the embodiment of the present application does not strictly limit the rotation angle required for the rotational transformation of the first constant-speed section 114 to obtain the second constant-speed section 115 or the rotational transformation of the second constant-speed section 115 to obtain the first constant-speed section 114. It can be any angle based on meeting the working requirements of the folding assembly 100, such as 170°, 180°, etc. For example, as Figure 9 shown, the first constant-speed section 114 can be obtained by rotational transformation around the midpoint of the line O1 to get the second constant-speed section 115.

[0149] Thus, due to the rotationally symmetric setting of the first constant-speed section 114 and the second constant-speed section 115, the absolute value of the slope at the connection of the first constant-speed section 114 and the second constant-speed section 115 changes little. The small change in the absolute value of the slope can make the speed change of the first shaft body 21 small when moving from the end of the first constant-speed section 114 to the beginning of the second constant-speed section 115, and further can make the speed change of the first shaft body 21 small when transitioning from the first constant-speed section 114 to the second constant-speed section 115.

[0150] Figure 12 is Figure 7 a schematic structural view of the first chute 11 of the folding assembly 100 shown, Figure 13 is Figure 7 another schematic structural view of the first chute 11 of the folding assembly 100 shown. In Figure 12 and Figure 13Among them, the inclination degrees of the first acceleration section 113 with respect to the first direction X are different.

[0151] In a possible implementation manner, as Figure 12 and Figure 13 shown, both the second constant-speed section 115 and the first constant-speed section 114 are straight-line segments. In this setting, the first constant-speed section 114 and the second constant-speed section 115 can jointly form a straight-line segment shape or a broken-line segment shape according to the different rotation angles between the first constant-speed section 114 and the second constant-speed section 115, with strong flexibility.

[0152] Figure 14 is Figure 7 Another schematic structural diagram of the first sliding groove 11 of the folding assembly 100 shown in Figure 15 is Figure 7 Another schematic structural diagram of the first sliding groove 11 of the folding assembly 100 shown in. Among Figure 14 and Figure 15 them, the inclination degrees of the first acceleration section 113 with respect to the first direction X are different.

[0153] In another possible implementation manner, as Figure 14 and Figure 15 shown, both the second constant-speed section 115 and the first constant-speed section 114 are arc segments, and the centers of curvature of the first constant-speed section 114 and the second constant-speed section 115 are respectively located on both sides of the first sliding groove 11. Among them, the centers of curvature of the first constant-speed section 114 and the second constant-speed section 115 being respectively located on both sides of the first sliding groove 11 can be understood as that the center of curvature of the first constant-speed section 114 and the center of curvature of the second constant-speed section 115 are, on the basis of taking the first sliding groove 11 as a reference object, one located on one side of the first sliding groove 11 and the other located on the opposite side of the first sliding groove 11. In this setting, the first constant-speed section 114 and the second constant-speed section 115 can jointly form curve segments of different shapes (such as wavy, S-shaped, etc.) according to the different rotation angles between the first constant-speed section 114 and the second constant-speed section 115, with strong flexibility.

[0154] Figure 16 is Figure 7 The corresponding relationship diagram of the climbing path of the second cam structure 831 and the moving path of the first shaft body 21 shown in

[0155] As Figure 16 shown, the stage when the first shaft body 21 slides in the first acceleration section 113 is the sliding stage S1. The stage when the first shaft body 21 slides in the first constant-speed section 114 and the second constant-speed section 115 is the sliding stage S2. The stage when the first shaft body 21 slides in the second acceleration section 116 is the sliding stage S3.

[0156] According to the change in the absolute value of the slope of each section of the first chute 11, it can be known that when the first shaft body 21 slides in the sliding stage S1, the sliding stage S2, and the sliding stage S3 in sequence, the moving speed of the first shaft body 21 in the first chute 11 presents three stages of "acceleration - slow - acceleration".

[0157] In Figure 16 it is defined that when the damping force generated by the first elastic member 84 pressing the first cam structure 81 through the second cam structure 831 and thus acting on the rotation of the first cam structure 81 is equal to the gravity required for the first torsion swing arm 30 and the second torsion swing arm to rotate freely, the value is the first peak value K1. Below the first peak value K1 indicates that the damping force that the first elastic member 84 can provide is less than the gravity required for the first torsion swing arm 30 and the second torsion swing arm to rotate freely, and above the first peak value K1 indicates that the damping force that the first elastic member 84 can provide is greater than the gravity required for the first torsion swing arm 30 and the second torsion swing arm to rotate freely.

[0158] The stage in which the second cam structure 831 climbs from the starting position on the left side of the first cam structure 81 to the first peak value K1 is the climbing stage D1. The stage in which the second cam structure 831 continues to climb above the first peak value K1 along the first cam structure 81 is the climbing stage D2. The stage in which the second cam structure 831 then climbs below the first peak value K1 along the first cam structure 81 to the end position on the right side is the climbing stage D3.

[0159] When the second cam structure 831 moves in the climbing stage D1, the climbing stage D2, and the climbing stage D3 in sequence, the damping force that the first elastic member 84 can provide is respectively less than, greater than, and less than the gravity required for the first torsion swing arm 30 and the second torsion swing arm to rotate freely. At this time, the damping assembly 80 is respectively in the first resistance state, the second resistance state, and the third resistance state. When the second cam structure 831 moves in the climbing stage D2, since the damping force brought by the first elastic member 84 is greater than the gravity required for the first torsion swing arm 30 and the second torsion swing arm to rotate freely, the folding assembly 100 can stop at any angle to achieve hovering, and further the electronic device 200 can achieve hovering at any angle.

[0160] As Figure 16 shown, when the first shaft body 21 moves in the sliding stage S1, the second cam structure 831 moves in the climbing stage D1. When the first shaft body 21 moves in the sliding stage S2, the second cam structure 831 moves in the climbing stage D2. When the first shaft body 21 moves in the sliding stage S3, the first sliding end moves in the climbing stage D3. That is to say, the sliding stage S1 corresponds to the climbing stage D1, the sliding stage S2 corresponds to the climbing stage D2, and the sliding stage S3 corresponds to the climbing stage D3.

[0161] When the first shaft body 21 accelerates during the sliding stage S1, the damping force that the first elastic member 84 can provide rapidly increases and approaches the first peak value K1. When the first shaft body 21 enters the sliding stage S2 from the end of the sliding stage S1, the damping force that the first elastic member 84 can provide is greater than the first peak value K1, and the folding assembly 100 enters the hover stage. The speed of the first shaft body 21 during the sliding stage S2 is slower than the speed of the first shaft body 21 during the sliding stage S1, so that the damping force that the first elastic member 84 can provide continuously decreases. Also, because the speed change of the first shaft body 21 during the sliding stage S2 is small, the speed at which the damping force that the first elastic member 84 can provide decreases becomes slower, and the time of the hover stage of the folding assembly 100 is extended. When the first shaft body 21 enters the sliding stage S3 from the end of the sliding stage S2, the damping force that the first elastic member 84 can provide is less than the first peak value K1, and the folding assembly 100 is unfolded / closed.

[0162] Based on the above description, it should be understood that the movement of the first shaft body 21 in the first acceleration section 113 is an acceleration stage that can enable the damping force provided by the first elastic member 84 to rapidly approach the first peak value K1. The movement of the first shaft body 21 in the first constant speed section 114 and the second constant speed section 115 is a slow speed stage in which the damping force provided by the first elastic member 84 is greater than the first peak value K1, causing the folding assembly 100 to enter the hover state. The movement of the first shaft body 21 in the second acceleration section 116 is an acceleration stage in which the damping force provided by the first elastic member 84 is less than the first peak value K1, causing the folding assembly 100 to be opened / closed. For example, when the folding assembly 100 is in the unfolded state, the damping assembly 80 is in the first resistance state, the first shaft body 21 slides in the first acceleration section 113, and the first torsion swing arm 30 and the second torsion swing arm 60 are relatively unfolded. When the folding assembly 100 switches from the unfolded state to the intermediate state, the damping assembly 80 is in the second resistance state, the first shaft body 21 slides in the first constant speed section 114 and the second constant speed section 115, and the first torsion swing arm 30 and the second torsion swing arm 60 gradually approach each other. When the folding assembly 100 switches from the intermediate state to the folded state, the damping assembly 80 is in the third resistance state, the first shaft body 21 slides in the second acceleration section 116, and the first torsion swing arm 30 and the second torsion swing arm 60 are relatively folded.

[0163] By designing the structure of the first sliding groove 11, the rotation and folding trajectory of the first torsion swing arm 30 can be effectively limited, ensuring the rotation effect of the folding assembly 100. Moreover, on the basis of retaining the cam climbing characteristics, the feel of the folding assembly 100 being fully deployed and closed can be ensured, so that during the rotation of the first torsion swing arm 30, the stage in which the damping force provided by the first elastic member 84 is greater than the first peak value K1 can be extended as much as possible. That is to say, during the folding process of the folding assembly 100, the range of the rotation angle of the folding assembly 100 corresponding to the first constant-speed section 114 and the second constant-speed section 115 can be relatively large, while the range of the rotation angle of the folding assembly 100 corresponding to the first acceleration section 113 and the second acceleration section 116 can be relatively small, thereby effectively increasing the time of the hovering stage with the maximum damping of the folding assembly 100. Also, since the time of the hovering stage with the maximum damping of the folding assembly 100 is extended, the hover angle range of the folding assembly 100 can be further expanded, which is beneficial to achieving large-angle hovering of the folding assembly 100. For example, the hover angle range of the folding assembly in the prior art is 80°-120°, and the hover angle range of the folding assembly 100 in the technical solution of the present application can be 30°-150°.

[0164] In the embodiment of the present application, the first acceleration section 113 and the second acceleration section 116 can be rotationally symmetric. That is to say, the first acceleration section 113 can be obtained by rotational transformation around a certain fixed point to get the second acceleration section 116, and the second acceleration section 116 can be obtained by rotational transformation around the same fixed point to get the first acceleration section 113. For example, as Figure 9 shown, the first acceleration section 113 can be obtained by rotational transformation around the midpoint of the line O1 to get the second acceleration section 116.

[0165] It should be noted that in the embodiment of the present application, there is no strict limitation on the rotation angle required for the rotational transformation of the first acceleration section 113 to get the second acceleration section 116 or the rotational transformation of the second acceleration section 116 to get the first acceleration section 113, and it can be any angle based on meeting the working requirements of the folding assembly 100, such as 170°, 180°, etc.

[0166] Therefore, due to the rotational symmetry between the first acceleration section 113 and the second acceleration section 116, and the rotational symmetry between the first constant-speed section 114 and the second constant-speed section 115, the first section 111 and the second section 112 are rotationally symmetric. That is to say, the first section 111 can be obtained by rotational transformation around a fixed point to get the second section 112, and the second section 112 can be obtained by rotational transformation around the same fixed point to get the first section 111. By splitting the structure of the first sliding groove 11 into two sections, due to the rotationally symmetric setting of the first section 111 and the second section 112, the absolute value of the slope at the connection between the first section 111 and the second section 112 changes little. The small change in the absolute value of the slope enables the first shaft body 21 to have a small speed change when moving from the end of the first section 111 to the beginning of the second section 112, which is beneficial to extending the speed stage S2, and further realizes the extension of the hoverable stage of the folding assembly 100.

[0167] For example, the first shaft body 21 sequentially passes through the first acceleration section 113, the first constant-speed section 114, the second constant-speed section 115, and the second acceleration section 116. According to the change in the absolute value of the slope of the first acceleration section 113 and the first constant-speed section 114 in the first section 111, the speed of the first shaft body 21 in the first section 111 is first fast and then slow. According to the change in the absolute value of the slope of the second constant-speed section 115 and the second acceleration section 116 in the second section 112, the speed of the first shaft body 21 in the second section 112 is first slow and then fast, so that the movement speed of the first shaft body 21 can be divided into three stages as a whole, namely "acceleration - slow - acceleration". The movement speed of the first shaft body 21 is related to the damping force that the first elastic member 84 can provide. When the first shaft body 21 starts to perform the acceleration movement in the first stage, the damping force that the first elastic member 84 can provide quickly approaches the first peak value K1. When the first shaft body 21 starts to perform the slow movement in the second stage, the damping force that the first elastic member 84 can provide is greater than the first peak value K1, and the folding assembly 100 enters the hoverable stage. When the slow movement of the first shaft body 21 in the second stage ends and it starts to perform the acceleration movement in the third stage, the damping force that the first elastic member 84 can provide is less than the first peak value K1, and the folding assembly 100 realizes unfolding / closing.

[0168] It should be noted that the embodiments of the present application do not strictly limit the rotation angle required for the first section 111 to be rotationally transformed to obtain the second section 112 or the second section 112 to be rotationally transformed to obtain the first section 111, which can be any angle based on meeting the working requirements of the folding assembly 100, such as 170°, 180°, etc.

[0169] In a possible implementation manner, as Figure 12 and Figure 14 shown, both the first acceleration section 113 and the second acceleration section 116 are straight line segments. In this implementation manner, as Figure 12As shown, the first constant-speed section 114 and the second constant-speed section 115 can be straight sections, so that the first chute 11 as a whole presents a broken-line shape with only straight sections. Or, as Figure 14 shown, the first constant-speed section 114 and the second constant-speed section 115 can also be arc sections, so that the first chute 11 as a whole presents a curved shape mixed with arc sections and straight sections.

[0170] In another possible implementation, as Figure 13 and Figure 15 shown, both the first acceleration section 113 and the second acceleration section 116 are arc sections, and the center of curvature of the first acceleration section 113 and the center of curvature of the second acceleration section 116 are respectively located on both sides of the first chute 11. Among them, the center of curvature of the first acceleration section 113 and the center of curvature of the second acceleration section 116 being respectively located on both sides of the first chute 11 can be understood as that the center of curvature of the first acceleration section 113 and the center of curvature of the second acceleration section 116, based on the first chute 11 as a reference, one is located on one side of the first chute 11 and the other is located on the opposite side of the first chute 11. And, the center of curvature of the first acceleration section 113 and the center of curvature of the first constant-speed section 114 are located on the same side of the first chute 11, and the center of curvature of the second acceleration section 116 and the center of curvature of the second constant-speed section 115 are located on the same side of the first chute 11.

[0171] In this implementation, as Figure 13 shown, the first constant-speed section 114 and the second constant-speed section 115 can be straight sections, so that the first chute 11 as a whole presents a curved shape mixed with arc sections and straight sections. Or, as Figure 15 shown, the first constant-speed section 114 and the second constant-speed section 115 can also be arc sections, so that the first chute 11 as a whole presents a curved shape with only arc sections.

[0172] Figure 17 is Figure 7 a schematic diagram of the shape deformation of the first chute 11 shown. Among them, line E1 is the reference line of the shape of the first chute 11, and line F1 is the extreme case of the shape of the first chute 11.

[0173] As Figure 17 shown, the shape of the first chute 11 can be designed within the range of line E1 and line F1 (including line F1), and there is no strict limit on this.

[0174] Please refer to again Figure 9, the second sliding groove 51 includes a third section 511 and a fourth section 512. The third section 511 includes a third acceleration section 513 and a third constant-speed section 514. The third acceleration section 513 and the third constant-speed section 514 are bent and connected. The bent connection can be understood as that the third acceleration section 513 and the third constant-speed section 514 are arranged at an angle, and the angle can be within the range of 0° - 180°. The absolute value of the slope of the third acceleration section 513 is greater than the absolute value of the slope of the third constant-speed section 514, and that the absolute value of the slope of the third acceleration section 513 is greater than the absolute value of the slope of the third constant-speed section 514 can be understood as that the absolute value of the slope at any position on the third acceleration section 513 is greater than the absolute value of the slope at any position on the third constant-speed section 514.

[0175] Wherein, taking the first direction X as the abscissa x-axis and the second direction Z as the ordinate to establish a coordinate system, the flexible display screen 210 when the folding assembly 100 is in the unfolded state can be parallel to the x-axis. The slope of the third acceleration section 513 represents the degree of inclination of the third acceleration section 513 relative to the x-axis (the first direction X) in the unfolded state of the folding assembly 100, and the slope of the curve or straight line corresponding to the third acceleration section 513 has positive and negative values, and the absolute value of the slope of the third acceleration section 513 is a positive value. The slope of the third constant-speed section 514 represents the degree of inclination of the third constant-speed section 514 relative to the x-axis (the first direction X) in the unfolded state of the folding assembly 100, and the slope of the curve or straight line corresponding to the third constant-speed section 514 has positive and negative values, and the absolute value of the slope of the third constant-speed section 514 is a positive value. Exemplarily, the third acceleration section 513 and the third constant-speed section 514 can be located in the first quadrant of the coordinate system. The slope of the third acceleration section 513 is a positive value, the slope of the third constant-speed section 514 is a positive value, and the absolute value of the slope of the third acceleration section 513 is greater than the absolute value of the slope of the third constant-speed section 514.

[0176] It can be understood that the second shaft body 22 can slide within the third acceleration section 513 and the third constant-speed section 514, and the sliding speed of the second shaft body 22 within the third acceleration section 513 and the third constant-speed section 514 is related to the absolute value of the slope of the third acceleration section 513 and the third constant-speed section 514. Specifically, when the second shaft body 22 moves in the section with a larger absolute value of the slope, the movement speed of the second shaft body 22 in this section is faster, and the angle change between the first main swing arm 10 and the second main swing arm 50 can be faster. When the second shaft body 22 moves in the section with a smaller absolute value of the slope, the movement speed of the second shaft body 22 in this section is slower. Therefore, at this stage, the angle change between the first main swing arm 10 and the second main swing arm 50 can be slower. Thus, when the second shaft body 22 moves in the third acceleration section 513, the movement speed of the first shaft body 21 in this section is faster. When the first shaft body 21 moves in the third constant-speed section 514, the movement speed of the first shaft body 21 in this section is slower.

[0177] The fourth section 512 includes a fourth acceleration section 516 and a fourth constant-speed section 515. The fourth constant-speed section 515 is connected to the third constant-speed section 514. One end of the fourth constant-speed section 515 away from the third constant-speed section 514 is bent and connected to the fourth acceleration section 516. The bent connection can be understood as that the fourth acceleration section 516 and the fourth constant-speed section 515 are arranged at an angle, and the angle can be within the range of 0°-180°. The absolute value of the slope of the fourth acceleration section 516 is greater than the absolute value of the slope of the fourth constant-speed section 515, and the fact that the absolute value of the slope of the fourth acceleration section 516 is greater than the absolute value of the slope of the fourth constant-speed section 515 can be understood as that the absolute value of the slope at any position on the fourth acceleration section 516 is greater than the absolute value of the slope at any position on the fourth constant-speed section 515.

[0178] Wherein, taking the first direction X as the abscissa x-axis and the second direction Z as the ordinate to establish a coordinate system, the flexible display screen 210 when the folding assembly 100 is in the unfolded state can be parallel to the x-axis. The slope of the fourth acceleration section 516 represents the degree of inclination of the fourth acceleration section 516 relative to the x-axis (the first direction X) in the unfolded state of the folding assembly 100. The slope of the curve or straight line corresponding to the fourth acceleration section 516 has positive and negative values, and the absolute value of the slope of the fourth acceleration section 516 is a positive value. The slope of the fourth constant-speed section 515 represents the degree of inclination of the fourth constant-speed section 515 relative to the x-axis (the first direction X) in the unfolded state of the folding assembly 100. The slope of the curve or straight line corresponding to the fourth constant-speed section 515 has positive and negative values, and the absolute value of the slope of the fourth constant-speed section 515 is a positive value. Exemplarily, the fourth acceleration section 516 and the fourth constant-speed section 515 can be located in the third quadrant of the coordinate system. The slope of the fourth acceleration section 516 is a positive value, the slope of the fourth constant-speed section 515 is a negative value, and the absolute value of the slope of the fourth acceleration section 516 is greater than the absolute value of the slope of the fourth constant-speed section 515.

[0179] It can be understood that the second shaft body 22 can slide within the fourth constant-speed section 515 and the fourth acceleration section 516, and the sliding speed of the second shaft body 22 within the fourth acceleration section 516 and the fourth constant-speed section 515 is related to the absolute value of the slope of the fourth acceleration section 516 and the fourth constant-speed section 515. Specifically, when the second shaft body 22 moves in the section with a larger absolute value of the slope, the moving speed of the second shaft body 22 in this section is faster. Therefore, in this stage, the angle change between the first main swing arm 10 and the second main swing arm 50 can be faster. When the second shaft body 22 moves in the section with a smaller absolute value of the slope, the moving speed of the second shaft body 22 in this section is slower. Therefore, in this stage, the angle change between the first main swing arm 10 and the second main swing arm 50 can be slower. Thus, when the second shaft body 22 moves in the fourth acceleration section 516, the moving speed of the second shaft body 22 in this section is faster. When the second shaft body 22 moves in the fourth constant-speed section 515, the moving speed of the second shaft body 22 in this section is slower.

[0180] In the embodiments of the present application, the fourth flat-speed section 515 is rotationally symmetric with the third flat-speed section 514. That is to say, the third flat-speed section 514 can be obtained by rotational transformation around a fixed point to get the fourth flat-speed section 515, and the fourth flat-speed section 515 can be obtained by rotational transformation around the same fixed point to get the third flat-speed section 514.

[0181] It should be noted that in the embodiments of the present application, there is no strict limitation on the rotation angle required for the third flat-speed section 514 to be rotationally transformed to obtain the fourth flat-speed section 515 or the fourth flat-speed section 515 to be rotationally transformed to obtain the third flat-speed section 514. It can be any angle based on meeting the working requirements of the folding assembly 100, such as 170°, 180°, etc. For example, as Figure 9 shown, the third flat-speed section 514 can be obtained by rotational transformation around the midpoint of the line O2 to get the fourth flat-speed section 515.

[0182] Thus, due to the rotationally symmetric setting of the third flat-speed section 514 and the fourth flat-speed section 515, the absolute value of the slope at the connection between the third flat-speed section 514 and the fourth flat-speed section 515 changes little. The small change in the absolute value of the slope can make the speed change little when the second shaft body 22 moves from the end of the third flat-speed section 514 to the beginning of the fourth flat-speed section 515, and further make the speed change little when the second shaft body 22 transitions from the third flat-speed section to the fourth flat-speed section 515.

[0183] Figure 18 is Figure 7 a schematic structural diagram of the second sliding groove 51 of the folding assembly 100 shown, Figure 19 is Figure 7 another schematic structural diagram of the second sliding groove 51 of the folding assembly 100 shown. In Figure 18 and Figure 19 the inclination degree of the third acceleration section 513 with respect to the first direction X is different.

[0184] In a possible implementation manner, as Figure 18 and Figure 19 shown, both the fourth flat-speed section 515 and the third flat-speed section 514 are straight line segments. With this setting, the third flat-speed section 514 and the fourth flat-speed section 515 can jointly form a straight line segment shape or a broken line segment shape according to the different rotation angles between the third flat-speed section 514 and the fourth flat-speed section 515, with strong flexibility.

[0185] Figure 20 is Figure 7 yet another schematic structural diagram of the second sliding groove 51 of the folding assembly 100 shown, Figure 21 is Figure 7 still another schematic structural diagram of the second sliding groove 51 of the folding assembly 100 shown. In Figure 20 and Figure 21In [the above structure], the inclination degree of the third acceleration section 513 with respect to the first direction X is different.

[0186] In another possible implementation, as Figure 20 and Figure 21 shown, both the fourth constant-speed section 515 and the third constant-speed section 514 are arc segments, and the centers of curvature of the third constant-speed section 514 and the fourth constant-speed section 515 are located on both sides of the second sliding groove 51 respectively. Among them, the centers of curvature of the third constant-speed section 514 and the fourth constant-speed section 515 being located on both sides of the second sliding groove 51 respectively can be understood as that, based on the second sliding groove 51 as a reference, one center of curvature is located on one side of the second sliding groove 51, and the other is located on the opposite side of the second sliding groove 51. Under this setting, the third constant-speed section 514 and the fourth constant-speed section 515 can jointly form curve segments of different shapes (such as wavy, S-shaped, etc.) according to the different rotation angles between the third constant-speed section 514 and the fourth constant-speed section 515, with strong flexibility.

[0187] Figure 22 is Figure 7 the corresponding relationship diagram between the climbing path of the fourth cam structure 832 shown in [the figure] and the movement path of the second shaft body 22.

[0188] As Figure 22 shown, the stage when the second shaft body 22 slides within the third acceleration section 513 is the sliding stage S4. The stage when the second shaft body 22 slides within the third constant-speed section 514 and the fourth constant-speed section 515 is the sliding stage S5. The stage when the second shaft body 22 slides within the fourth acceleration section 516 is the sliding stage S6.

[0189] According to the change in the absolute value of the slope of the first sliding groove 11 in each section, it can be known that when the second shaft body 22 slides in the sliding stage S4, the sliding stage S5, and the sliding stage S6 in sequence, the movement speed of the second shaft body 22 within the first sliding groove 11 presents three stages of "acceleration - slow - acceleration".

[0190] In Figure 22 [the above structure], the critical line when the damping force generated by the second elastic member 85 squeezing the third cam structure 82 through the fourth cam structure 832 and thus affecting the rotation of the third cam structure 82 is equal to the gravity required for the first torsion pendulum arm 30 and the second torsion pendulum arm to rotate freely is defined as the second peak value K2. Below the second peak value K2, it means that the damping force provided by the second elastic member 85 is less than the gravity required for the first torsion pendulum arm 30 and the second torsion pendulum arm to rotate freely. Above the second peak value K2, it means that the damping force provided by the second elastic member 85 is greater than the gravity required for the first torsion pendulum arm 30 and the second torsion pendulum arm to rotate freely.

[0191] The stage in which the fourth cam structure 832 climbs from the starting position on the left side of the third cam structure 82 to the second peak K2 is the climbing stage D4. The stage in which the fourth cam structure 832 continues to climb above the second peak K2 along the third cam structure 82 is the climbing stage D5. The stage in which the fourth cam structure 832 then climbs below the second peak K2 to the right end position along the third cam structure 82 is the climbing stage D6.

[0192] When the fourth cam structure 832 moves in the climbing stage D4, the climbing stage D5, and the climbing stage D6 in sequence, the damping force that the second elastic member 85 can provide is respectively less than, greater than, and less than the gravity required for the first torsion swing arm 30 and the second torsion swing arm to rotate freely. At this time, the damping assembly 80 is respectively in the first resistance state, the second resistance state, and the third resistance state. When the fourth cam structure 832 moves in the climbing stage D5, since the damping force brought by the second elastic member 85 is greater than the gravity required for the first torsion swing arm 30 and the second torsion swing arm to rotate freely, the folding assembly 100 can stop at any angle to achieve hovering, and further enables the electronic device 200 to achieve hovering at different angles.

[0193] As Figure 22 shown, when the second shaft body 22 moves in the sliding stage S4, the fourth cam structure 832 moves in the climbing stage D4. When the second shaft body 22 moves in the sliding stage S5, the fourth cam structure 832 moves in the climbing stage D5. When the second shaft body 22 moves in the sliding stage S6, the first sliding end moves in the climbing stage D6. That is to say, the sliding stage S4 corresponds to the climbing stage D4, the sliding stage S5 corresponds to the climbing stage D5, and the sliding stage S6 corresponds to the climbing stage D6.

[0194] When the second shaft body 22 accelerates in the sliding stage S4, the damping force that the second elastic member 85 can provide increases rapidly and approaches the second peak K2. When the second shaft body 22 enters the sliding stage S5 from the end of the sliding stage S4, the damping force that the second elastic member 85 can provide is greater than the second peak K2, and the folding assembly 100 enters the hoverable stage. The speed of the second shaft body 22 in the sliding stage S5 is slower than the speed of the second shaft body 22 in the sliding stage S4, so that the damping force that the second elastic member 85 can provide continuously decreases. Also, because the speed change of the second shaft body 22 in the sliding stage S5 is small, the speed at which the damping force that the second elastic member 85 can provide decreases becomes slower, and the hoverable stage time of the folding assembly 100 is extended. When the second shaft body 22 enters the sliding stage S6 from the end of the sliding stage S5, the damping force that the second elastic member 85 can provide is less than the second peak K2, and the folding assembly 100 realizes unfolding / closing.

[0195] Based on the above description, it should be understood that the movement of the second shaft body 22 in the third acceleration section 513 is an acceleration stage that enables the damping force provided by the second elastic member 85 to rapidly approach the second peak value K2. The movement of the second shaft body 22 in the third constant speed section 514 and the fourth constant speed section 515 is a slow speed stage in which the damping force provided by the second elastic member 85 is greater than the second peak value K2, causing the folding assembly 100 to enter the hovering state. The movement of the second shaft body 22 in the fourth acceleration section 516 is an acceleration stage in which the damping force provided by the second elastic member 85 is less than the second peak value K2, enabling the folding assembly 100 to quickly open and close. For example, when the folding assembly 100 is in the unfolded state, the damping assembly 80 is in the first resistance state, and the second shaft body 22 slides within the third acceleration section 513, and the first torsion swing arm 30 and the second torsion swing arm 60 are relatively unfolded. When the folding assembly 100 switches from the unfolded state to the intermediate state, the damping assembly 80 is in the second resistance state, and the second shaft body 22 slides within the third constant speed section 514 and the fourth constant speed section 515, and the first torsion swing arm 30 and the second torsion swing arm 60 gradually approach each other. When the folding assembly 100 switches from the intermediate state to the folded state, the damping assembly 80 is in the third resistance state, and the second shaft body 22 slides within the fourth acceleration section 516, and the first torsion swing arm 30 and the second torsion swing arm 60 are relatively folded.

[0196] By designing the structure of the second chute 51, the rotation and folding trajectory of the second torsion swing arm 60 can be effectively limited, ensuring the rotation effect of the folding assembly 100. Moreover, on the basis of retaining the cam climbing characteristics, the feel of the folding assembly 100 being fully unfolded and closed can be ensured, and the stage in which the damping force provided by the second elastic member 85 is greater than the second peak value K2 can be extended as much as possible during the rotation of the second torsion swing arm 60. That is to say, during the folding process of the folding assembly 100, the range of the rotation angle of the folding assembly 100 corresponding to the first constant speed section 114 and the second constant speed section 115 can be relatively large, while the range of the rotation angle of the folding assembly 100 corresponding to the first acceleration section 113 and the second acceleration section 116 can be relatively small, thereby effectively increasing the time of the hovering stage with the maximum damping of the folding assembly 100.

[0197] In the embodiments of the present application, the third acceleration section 513 and the fourth acceleration section 516 may be rotationally symmetric. That is to say, the third acceleration section 513 can be obtained by rotational transformation around a certain point to get the fourth acceleration section 516, and the fourth acceleration section 516 can be obtained by rotational transformation around the same point to get the third acceleration section 513.

[0198] It should be noted that the embodiments of the present application do not strictly limit the rotation angle required for the third acceleration section 513 to be rotationally transformed to obtain the fourth acceleration section 516 or the fourth acceleration section 516 to be rotationally transformed to obtain the third acceleration section 513. It can be any angle that meets the working requirements of the folding assembly 100, such as 170°, 180°, etc.

[0199] Thus, due to the rotation symmetry between the third acceleration section 513 and the fourth acceleration section 516, and the rotation symmetry between the third constant-speed section 514 and the fourth constant-speed section 515, the third section 511 and the fourth section 512 are rotationally symmetric. That is to say, the third section 511 can be obtained by rotating around a fixed point through a rotational transformation to get the fourth section 512, and the fourth section 512 can be obtained by rotating around the same fixed point through a rotational transformation to get the third section 511. By splitting the structure of the second chute 51 into two sections, due to the rotation symmetry between the third section 511 and the fourth section 512, the absolute value change of the slope at the connection between the third section 511 and the fourth section 512 is small. The small absolute value change of the slope can make the speed change of the second shaft body 22 small when it moves from the end of the third section 511 to the beginning of the fourth section 512, which is beneficial to extending the speed stage S2, and then realizing the extension of the hoverable stage of the folding assembly 100. Also, since the time of the hoverable stage with the maximum damping of the folding assembly 100 is extended, the hoverable angle range of the folding assembly 100 can be further expanded, which is beneficial to realizing the large-angle hover of the folding assembly 100. For example, the hoverable angle range of the folding assembly in the prior art is 80° - 120°, and the hoverable angle range of the folding assembly 100 in the technical solution of the present application can be 30° - 150°.

[0200] For example, the second shaft body 22 sequentially passes through the third acceleration section 513, the third constant-speed section 514, the fourth constant-speed section 515, and the fourth acceleration section 516. According to the absolute value change of the slopes of the third acceleration section 513 and the third constant-speed section 514 in the third section 511, that is, the speed of the second shaft body 22 in the third section 511 is first fast and then slow. According to the absolute value change of the slopes of the fourth constant-speed section 515 and the fourth acceleration section 516 in the fourth section 512, the speed of the second shaft body 22 in the fourth section 512 is first slow and then fast, so that the movement speed of the second shaft body 22 can be divided into three stages as a whole, namely "acceleration - slow - acceleration". And the movement speed of the second shaft body 22 is related to the damping force that the second elastic member 85 can provide. When the second shaft body 22 starts to perform the slow movement in the second stage, the damping force that the second elastic member 85 can provide is greater than the second peak value K2, and the folding assembly 100 enters the hoverable stage. When the slow movement of the second shaft body 22 in the second stage ends and it starts to perform the acceleration movement in the third stage, the damping force that the second elastic member 85 can provide is less than the second peak value K2, and the folding assembly 100 realizes the unfolding / closing.

[0201] It should be noted that the embodiment of the present application does not strictly limit the rotation angle required for the third section 511 to be rotationally transformed to obtain the fourth section 512 or the fourth section 512 to be rotationally transformed to obtain the third section 511, which can be any angle on the basis of meeting the working requirements of the folding assembly 100, such as 170°, 180°, etc. For example, as Figure 9As shown, the third section 511 can be obtained by rotation transformation around the midpoint of the line O2 to get the fourth section 512.

[0202] In a possible implementation, as Figure 18 and Figure 20 shown, both the third acceleration section 513 and the fourth acceleration section 516 are straight line segments. In this implementation, as Figure 18 shown, the third constant speed section 514 and the fourth constant speed section 515 can be straight line segments, so that the second chute 51 as a whole presents a broken line shape with only straight line segments. Or, as Figure 20 shown, the third constant speed section 514 and the fourth constant speed section 515 can also be arc line segments, so that the second chute 51 as a whole presents a curve shape mixed with arc line segments and straight line segments.

[0203] In another possible implementation, as Figure 19 and Figure 21 shown, both the third acceleration section 513 and the fourth acceleration section 516 are arc line segments, and the centers of curvature of the third acceleration section 513 and the fourth acceleration section 516 are respectively located on both sides of the second chute 51. Among them, the centers of curvature of the third acceleration section 513 and the fourth acceleration section 516 being respectively located on both sides of the second chute 51 can be understood as that the center of curvature of the third acceleration section 513 and the center of curvature of the fourth acceleration section 516 are, on the basis of taking the second chute 51 as a reference, one located on one side of the second chute 51 and the other located on the opposite side of the second chute 51. And, the center of curvature of the third acceleration section 513 and the center of curvature of the third constant speed section 514 are located on the same side of the second chute 51, and the center of curvature of the fourth acceleration section 516 and the center of curvature of the fourth constant speed section 515 are located on the same side of the second chute 51.

[0204] In this implementation, as Figure 19 shown, the third constant speed section 514 and the fourth constant speed section 515 can be straight line segments, so that the second chute 51 as a whole presents a curve shape mixed with arc line segments and straight line segments. Or, as Figure 21 shown, the third constant speed section 514 and the fourth constant speed section 515 can also be arc line segments, so that the second chute 51 as a whole presents a curve shape with only arc line segments.

[0205] Figure 23 is Figure 7 a schematic diagram of the shape deformation of the second chute 51 shown. Among them, the line E2 is the reference line of the shape of the second chute 51, and the line F2 is the extreme case of the shape of the second chute 51.

[0206] As Figure 23 shown, the shape of the second chute 51 can be designed within the range of the line E2 and the line F2 (including the line F2), and there is no strict restriction on this.

[0207] The above has introduced the embodiments of the present application in detail. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A folding component, characterized in that, The folding assembly includes: A first main swing arm, on which a first chute is provided. The first chute includes a first acceleration section and a first constant-speed section connected to each other. The absolute value of the slope of the first acceleration section is greater than the absolute value of the slope of the first constant-speed section; A first torsion swing arm, which includes a first end and a second end; A first shaft body, which passes through the first end and is connected to the first chute to connect the first torsion swing arm and the first main swing arm; and A damping assembly, which is rotationally connected to the second end. When the first torsion swing arm rotates relative to the damping assembly, the first shaft body moves from the first acceleration section to the first constant-speed section, and the damping assembly is converted from a first resistance state to a second resistance state. The rotational resistance of the damping assembly to the first torsion swing arm in the second resistance state is greater than the rotational resistance of the damping assembly to the first torsion swing arm in the first resistance state.

2. The folding assembly according to claim 1, wherein The first chute further includes a second constant-speed section and a second acceleration section. One end of the second constant-speed section is connected to the first constant-speed section, and the other end of the second constant-speed section is connected to the second acceleration section. The absolute value of the slope of the second acceleration section is greater than the absolute value of the slope of the second constant-speed section, and the second constant-speed section is rotationally symmetric with the first constant-speed section; When the first shaft body moves from the first constant-speed section to the second constant-speed section, the damping assembly maintains the second resistance state. When the first shaft body moves from the second constant-speed section to the second acceleration section, the damping assembly is converted from the second resistance state to a third resistance state. The rotational resistance of the damping assembly to the first torsion swing arm in the second resistance state is greater than the rotational resistance of the damping assembly to the first torsion swing arm in the third resistance state.

3. The folding assembly according to claim 2, wherein, The centers of curvature of the first acceleration section and the second acceleration section are respectively located on both sides of the first chute.

4. The folding assembly according to claim 2, wherein, Both the first acceleration section and the second acceleration section are straight-line segments.

5. The folding assembly according to any one of claims 2-4, wherein The first acceleration section and the second acceleration section are rotationally symmetric.

6. The folding assembly according to any one of claims 2-4, characterized in that, The centers of curvature of the first constant-speed section and the second constant-speed section are respectively located on both sides of the first chute.

7. The folding assembly according to claim 6, wherein The center of curvature of the first constant-speed section and the center of curvature of the first acceleration section are located on the same side of the first chute, and the center of curvature of the second constant-speed section and the center of curvature of the second acceleration section are located on the same side of the first chute.

8. The folding assembly according to claim 6, wherein, Both the first constant-speed section and the second constant-speed section are straight-line segments.

9. The folding assembly according to any one of claims 1-4, characterized in that, The folding assembly further includes a first rotating shaft, which is disposed through the second end. The damping assembly includes a first cam structure, a second cam structure, a first elastic member, and a limiting member; The first cam structure is fixed to the second end and sleeved on the first rotating shaft. The second cam structure is sleeved on the first rotating shaft and contacts the first cam structure. The limiting member is fixed to the first rotating shaft. The first elastic member abuts between the second cam structure and the limiting member. The second cam structure can move along the first rotating shaft under the push of the first cam structure to compress or release the first elastic member.

10. A folding component, characterized in that, The folding assembly includes: A first main swing arm, wherein a first sliding groove is provided on the first main swing arm, the first sliding groove includes a first acceleration section and a first constant-speed section connected to each other, and the absolute value of the slope of the first acceleration section is greater than the absolute value of the slope of the first constant-speed section; A first torsion swing arm, the first torsion swing arm includes a first end and a second end; A first shaft body, the first shaft body passes through the first end and the first sliding groove, the first shaft body connects the first torsion swing arm and the first main swing arm, and the first shaft body can slide in the first sliding groove; A first rotating shaft, the first rotating shaft is disposed through the second end; and A damping assembly, including a first cam structure, a second cam structure, a first elastic member and a limiting member, the first cam structure is fixed to the second end and sleeved on the first rotating shaft, the second cam structure is sleeved on the first rotating shaft and contacts the first cam structure, the first elastic member abuts between the second cam structure and the limiting member, and the second cam structure can move along the first rotating shaft under the push of the first cam structure to compress or release the first elastic member.

11. The folding assembly according to claim 10, wherein The first sliding groove further includes a second constant-speed section and a second acceleration section, one end of the second constant-speed section is connected to the first constant-speed section, the other end of the second constant-speed section is connected to the second acceleration section, the slope of the second acceleration section is greater than the slope of the second constant-speed section, and the second constant-speed section is rotationally symmetric with the first constant-speed section.

12. The folding assembly according to claim 11, wherein, The centers of curvature of the first acceleration section and the second acceleration section are respectively located on both sides of the first sliding groove.

13. An electronic device, characterized in that, Comprising a flexible display screen and a folding assembly according to any one of claims 1-9, the flexible display screen is carried on the folding assembly; Or, Comprising a flexible display screen and a folding assembly according to any one of claims 10-12, the flexible display screen is carried on the folding assembly.

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