Damping structure, rotating shaft mechanism and foldable equipment

Abstract

The invention provides a damping structure, a rotating shaft mechanism and foldable equipment, relates to the technical field of foldable equipment, and can simplify the structural composition of the damping structure and reduce the cost. The damping structure comprises a fixing base, a first swing arm, a second swing arm and an elastic piece. The first swing arm and the second swing arm are rotatably connected to the fixing base through a first rotating shaft and a second rotating shaft respectively. The first swing arm is provided with a first matching surface, and the second swing arm is provided with a second matching surface. In the synchronous rotating process, the first matching face and the second matching face are in matched contact in the first state and the second state, the distances between the first rotating shaft and the second rotating shaft in the first state and the second state are the first distance and the second distance respectively, and the first distance is smaller than the second distance. The elastic piece is connected between the first swing arm and the second swing arm, and in the process that the first swing arm and the second swing arm synchronously rotate from the first state to the second state, the elastic piece is stretched and applies elastic pulling force to the first swing arm and the second swing arm.

Description

Technical Field

[0001] The present application relates to the technical field of foldable devices, and in particular to a damping structure, a rotating shaft mechanism and a foldable device. Background Art

[0002] Foldable devices, such as foldable screen devices and laptops, feature a hinge mechanism that allows the device to fold between an unfolded and folded state. This hinge mechanism is often also equipped with a damping structure to enhance the folding feel and allow the device to hover between at least one of the unfolded, folded, and semi-folded states. Prior art damping structures often include numerous components, making assembly and disassembly complex. This not only increases costs and makes maintenance difficult, but also hinders further thinning and lightweighting. Summary of the Invention

[0003] The present application provides a damping structure, a rotating shaft mechanism and a foldable device, which can simplify the structural composition of the damping structure, reduce costs, and contribute to the lightness and thinness of the entire device.

[0004] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0005] In a first aspect, a damping structure is provided, comprising a fixed base, a first swing arm, a second swing arm, and an elastic member. The first swing arm is rotatably connected to the fixed base via a first rotating shaft, and the second swing arm is rotatably connected to the fixed base via a second rotating shaft. The first and second swing arms are capable of synchronously rotating between a folded state and an unfolded state. The first swing arm has a first mating surface extending circumferentially along the first rotating shaft, and the second swing arm has a second mating surface extending circumferentially along the second rotating shaft. The first mating surface includes a first region and a second region, and the second mating surface includes a first mating region and a second mating region. During synchronous rotation of the first and second swing arms, the first region and the first mating region engage with each other when the first and second swing arms are in a first state, and the second region and the second mating region engage with each other when the first and second swing arms are in a second state. The first state and the second state are different. The distance between the first and second rotating shafts when the first and second swing arms are in the first state is a first distance, and the distance between the first and second rotating shafts when the first and second swing arms are in the second state is a second distance, and the first distance is smaller than the second distance. The elastic member is connected between the first swing arm and the second swing arm. When the first swing arm and the second swing arm rotate synchronously from the first state to the second state, the elastic member is stretched and applies elastic tension to the first swing arm and the second swing arm.

[0006] As a result, during the synchronous rotation of the first and second swing arms from the first state to the second state, the elastic tension of the elastic member causes frictional engagement between the first and second mating surfaces to generate a damping force. This damping force is fed back to the user, creating a damping feel and enhancing the user experience. Furthermore, during the synchronous rotation of the first and second swing arms from the first state to the second state, the distance between the first and second swing arms increases, stretching the elastic member and applying an elastic tension to the first and second swing arms. External force is required to drive the synchronous rotation of the first and second swing arms from the first state to the second state. In the absence of external force, the first and second swing arms can remain stably in the first state, i.e., the first state is a stable state. This enhances the stability and reliability of the foldable device during use. This damping structure can simultaneously damp both swing arm assemblies. It comprises a small number of components, simplifies assembly and disassembly, is low-cost, and minimizes maintenance, contributing to further lightweighting and thinning of the entire device.

[0007] Optionally, the first region is a planar region, the second region is an arcuate region, and the second region protrudes away from the first rotating shaft. Optionally, the centerline of the second region can be collinear with the central axis of the first rotating shaft. The first mating region is a planar region, the second mating region is an arcuate region, and the second mating region protrudes away from the second rotating shaft. Optionally, the centerline of the second mating region can be collinear with the central axis of the second rotating shaft. This structure is simple, symmetrical, and provides uniform force distribution and excellent motion stability.

[0008] Optionally, the first area and the second area are both arc surface areas. The first area and the second area both protrude in a direction away from the first rotating shaft. Optionally, the center line of the first area and the center line of the second area are both collinear with the central axis of the first rotating shaft. The first mating area and the second mating area are both arc surface areas. The first mating area is recessed toward the second rotating shaft. Optionally, when the first swing arm and the second swing arm are in the first state, the first mating area fits with the first area, and the center line of the first mating area is collinear with the central axis of the first rotating shaft. The second mating area protrudes in a direction away from the second rotating shaft. Optionally, the center line of the second mating area can be collinear with the central axis of the second rotating shaft. This structure is regular and convenient for processing.

[0009] Optionally, the first mating surface further includes a third region and a fourth region arranged circumferentially along the first rotating shaft. The fourth region is located on a side of the second region away from the first region, and the third region is located on a side of the fourth region away from the second region. The second mating surface further includes a third mating region and a fourth mating region arranged circumferentially along the second rotating shaft. The fourth mating region is located on a side of the second mating region away from the first mating region, and the third mating region is located on a side of the fourth mating region away from the second mating region. During synchronous rotation of the first and second swing arms, the third region and the third mating region are in mating contact when the first and second swing arms are in a third state, and the fourth region and the fourth mating region are in mating contact when the first and second swing arms are in a fourth state, where the third state is different from the fourth state. The distance between the first and second rotating shafts when the first and second swing arms are in the third state is a third distance, and the distance between the first and second rotating shafts when the first and second swing arms are in the fourth state is a fourth distance, where the third distance is less than the fourth distance. During synchronous rotation of the first and second swing arms from the third state to the fourth state, the elastic member is stretched, exerting an elastic tension on the first and second swing arms. In this way, during the synchronous rotation of the first and second swing arms from the third state to the fourth state, under the elastic tension of the elastic member, the first and second mating surfaces frictionally cooperate to generate a damping force. This damping force is fed back to the user, thereby creating a damping feel and enhancing the user experience. Furthermore, during the synchronous rotation of the first and second swing arms from the third state to the fourth state, the distance between the first and second swing arms is increased, the elastic member is stretched, and an elastic tension is applied to the first and second swing arms. External force is required to drive the first and second swing arms to synchronously rotate from the third state to the fourth state. In the absence of external force, the first and second swing arms can stably remain in the third state. In other words, the third state is another stable state, thereby enhancing the stability and reliability of the foldable device during use. In this way, the damping structure has two stable states: the first state and the third state.

[0010] Optionally, the first mating surface further includes a fifth region and a sixth region. The fifth region is located between the fourth region and the second region, and the sixth region is located between the fifth region and the fourth region. The second mating surface further includes a fifth mating region and a sixth mating region. The fifth mating region is located between the second mating region and the fourth mating region, and the sixth mating region is located between the fifth mating region and the fourth mating region. During synchronous rotation of the first and second swing arms, the fifth and fifth mating regions mate and contact when the first and second swing arms are in the fifth state, and the sixth and sixth mating regions mate and contact when the first and second swing arms are in the sixth state. The fifth state is different from the sixth state. The distance between the first and second rotating shafts when the first and second swing arms are in the fifth state is a fifth distance, and the distance between the first and second rotating shafts when the first and second swing arms are in the sixth state is a sixth distance. The fifth distance is less than the sixth distance, and the fifth distance is also less than the second distance. During synchronous rotation of the first and second swing arms from the fifth state to the sixth state, or from the fifth state to the second state, the elastic member is stretched, applying elastic tension to the first and second swing arms. In this way, during the synchronous rotation of the first and second swing arms from the fifth state to the sixth state, or from the fifth state to the second state, the first and second mating surfaces frictionally cooperate under the elastic tension of the elastic member to generate a damping force. This damping force is fed back to the user, thereby creating a damping feel and enhancing the user experience. Furthermore, during the synchronous rotation of the first and second swing arms from the fifth state to the sixth state, or from the fifth state to the second state, the distance between the first and second swing arms increases, the elastic member is stretched, and an elastic tension is applied to the first and second swing arms. External force is required to drive the first and second swing arms to synchronously rotate from the fifth state to the sixth state, or from the fifth state to the second state. In the absence of external force, the first and second swing arms can stably remain in the fifth state. In other words, the fifth state is another stable state, thereby enhancing the stability and reliability of the foldable device during use. Thus, the damping structure has three stable states: the first state, the third state, and the fifth state.

[0011] Optionally, the first mating surface further includes a seventh region, located between the fourth and sixth regions. The second mating surface further includes a seventh mating region, located between the sixth and fourth mating regions. During synchronous rotation of the first and second swing arms, the seventh region and the seventh mating region engage with each other when the first and second swing arms are in the seventh state. The distance between the first and second rotating shafts when the first and second swing arms are in the seventh state is a seventh distance, which is less than the fourth distance and further less than the sixth distance. During synchronous rotation of the first and second swing arms from the seventh state to the fourth state, or from the seventh state to the sixth state, the elastic member is stretched and applies an elastic tension to the first and second swing arms. Consequently, during synchronous rotation of the first and second swing arms from the seventh state to the fourth state, or from the seventh state to the sixth state, the elastic member, under the elastic tension of the elastic member, frictionally engages the first and second mating surfaces to generate a damping force. This damping force is fed back to the user, thereby creating a damping feel and enhancing the user experience. Furthermore, when the first and second swing arms rotate synchronously from the seventh state to the fourth state, or from the seventh state to the sixth state, the distance between the first and second swing arms is increased, the elastic member is stretched, and an elastic tension is applied to the first and second swing arms. External force is required to drive the first and second swing arms to rotate synchronously from the seventh state to the fourth state, or from the seventh state to the sixth state. In the absence of external force, the first and second swing arms can stably remain in the seventh state. In other words, the seventh state is another stable state, thereby enhancing the stability and reliability of the foldable device during use. Thus, the damping structure has four stable states: the first state, the third state, the fifth state, and the seventh state.

[0012] Optionally, the first state is an unfolded state, the third state is a folded state, and the fifth state and the seventh state are semi-folded states.

[0013] Optionally, at least one of the first rotating shaft and the second rotating shaft is slidably connected to the fixing base, so that the distance between the first rotating shaft and the second rotating shaft can be changed between a first distance and a second distance, thereby enabling the first swing arm and the second swing arm to switch between the first state and the second state.

[0014] Optionally, a first long hole and a second long hole are provided on the fixing seat. The arrangement direction of the first long hole and the second long hole is consistent with the arrangement direction of the first rotating shaft and the second rotating shaft, the extension direction of the first long hole is also consistent with the arrangement direction of the first rotating shaft and the second rotating shaft, and the extension direction of the second long hole is also consistent with the arrangement direction of the first rotating shaft and the second rotating shaft. The first rotating shaft can be slidably accommodated in the first long hole, and the second rotating shaft can be slidably accommodated in the second long hole. When the first swing arm and the second swing arm are in the first state, the first rotating shaft is accommodated in the end of the first long hole facing the second long hole, and the second rotating shaft is accommodated in the end of the second long hole facing the first long hole. When the first swing arm and the second swing arm are in the second state, the first rotating shaft is accommodated in the end of the first long hole away from the second long hole, and the second rotating shaft is accommodated in the end of the second long hole away from the first long hole. In this way, the length of each of the first long hole and the second long hole can be set shorter, which has less impact on the structural strength of the fixed seat, and the first rotating shaft and the second rotating shaft can both slide relative to the fixed seat, so the movement flexibility is better and jamming can be prevented.

[0015] Optionally, the elastic member is a spring sheet, and the thickness of the spring sheet is aligned with the extension direction of the first and second rotating shafts. The thin spring sheet can provide elastic force while reducing the axial width occupied by the damping structure in the first and second rotating shafts, thereby increasing flexibility in selecting the location and number of damping structures within the rotating shaft mechanism.

[0016] Optionally, there are two elastic members, spaced apart along the axial direction of the first and second rotating shafts, and both elastic members are connected between the first and second rotating shafts. Along the axial direction of the first and second rotating shafts, the first swing arm and the second swing arm are located between the two elastic members. The two elastic members can balance the forces acting on the damping structure, improving the structural stability of the entire device. Furthermore, the two elastic members can provide a greater elastic force and thus a greater damping force, resulting in greater stability of the damping structure in a steady state.

[0017] Optionally, the elastic member includes a first fixing portion, a second fixing portion, and at least one elastic arm connected between the first fixing portion and the second fixing portion. The first fixing portion is fixedly connected to the first rotating shaft, the second fixing portion is fixedly connected to the second rotating shaft, and the at least one elastic arm is arranged in the same plane. Each elastic arm includes at least one first elastic arm segment, and the extension direction of the first elastic arm segment intersects or is perpendicular to the arrangement direction of the first fixing portion and the second fixing portion. In this way, the elastic arm can bend and deform to allow the distance between the center of the portion of the first fixing portion connected to the first rotating shaft and the center of the portion of the second fixing portion connected to the second rotating shaft to change, thereby allowing the distance between the first rotating shaft and the second rotating shaft to change, and after the elastic arm is deformed, it can generate elastic tension on the first rotating shaft and the second rotating shaft. This structure is simple, and because the elastic arm extends along a plane, the thickness can be reduced, forming a sheet-like structure, which is conducive to reducing the width of the damping structure along the axial direction of the first rotating shaft and the second rotating shaft.

[0018] Optionally, each elastic arm further includes at least one second elastic arm segment, the second elastic arm segment extending in a direction consistent with the arrangement direction of the first and second fixing portions. The second elastic arm segment is configured to increase the spacing between two adjacent first elastic arm segments, or between a first elastic arm segment and the first fixing portion, or between the first elastic arm segment and the second fixing portion, so that the first elastic arm segment can extend in a direction perpendicular to the arrangement direction of the first and second fixing portions, thereby increasing the elastic deformation capability of the elastic member, enhancing the elastic force of the elastic member, and improving the damping force of the damping structure.

[0019] Optionally, there are multiple elastic arms, and at least one second elastic arm segment of the multiple elastic arms is formed into one piece, thereby reducing the structural complexity of the elastic member.

[0020] In a second aspect, a rotating shaft mechanism is provided, comprising a rotating shaft base, a first connecting member, a second connecting member, and a damping structure as described in any of the above technical solutions. The first connecting member and the second connecting member are located on opposite sides of the rotating shaft base. The fixing base of the damping structure is fixedly connected to the rotating shaft base, a first swing arm within the damping structure is connected to the first connecting member, and a second swing arm within the damping structure is connected to the second connecting member.

[0021] Since the rotating shaft mechanism provided in the present application includes the damping structure described in any of the above technical solutions, the two can solve the same technical problem and achieve the same effect.

[0022] In a third aspect, a foldable device is provided, comprising a first structural member, a second structural member, and a hinge mechanism as described above, wherein a first connecting member of the hinge mechanism is fixedly connected to the first structural member, and a second connecting member of the hinge mechanism is fixedly connected to the second structural member.

[0023] Since the foldable device provided in this application includes the hinge mechanism described in the above technical solution, the two can solve the same technical problem and achieve the same effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A perspective view of a foldable device in an unfolded state provided by some embodiments of the present application;

[0025] Figure 2 for Figure 1 a perspective view of the foldable device shown in a folded state;

[0026] Figure 3 for Figure 1 a perspective view of the foldable device shown in a semi-folded state;

[0027] Figure 4 A schematic diagram of the structure of a rotating shaft mechanism and a partial enlarged view of area A in the rotating shaft mechanism provided in the related art;

[0028] Figure 5 A structural diagram of another rotating shaft mechanism provided in the related art and a partial enlarged view of area B in the rotating shaft mechanism;

[0029] Figure 6 A top view of a rotating shaft mechanism provided in some embodiments of the present application;

[0030] Figure 7 A top view of a rotating shaft mechanism provided in some other embodiments of the present application;

[0031] Figure 8 for Figure 6 and Figure 7 A three-dimensional diagram of the damping structure in the rotating shaft mechanism shown;

[0032] Figure 9 for Figure 8 Schematic diagram of the decomposed structure of the damping structure shown;

[0033] Figure 10 for Figure 6 The cross-sectional structural diagram of the rotating shaft mechanism along the AA direction and the partial structural diagram of area C are shown;

[0034] Figure 11 A schematic structural diagram of a first mating surface and a second mating surface in a damping structure provided in some other embodiments of the present application;

[0035] Figure 12 Schematic diagrams of the cross-sectional structure of the rotating shaft mechanism in the first state and a partial structural diagram of area D provided in some other embodiments of the present application;

[0036] Figure 13 for Figure 12A schematic cross-sectional view of the rotating shaft mechanism in the third state and a schematic partial structural view of area E are shown;

[0037] Figure 14 Schematic diagram of the cross-sectional structure of the rotating shaft mechanism in the first state and a partial structural diagram of area F provided in some other embodiments of the present application;

[0038] Figure 15 for Figure 14 A schematic cross-sectional view of the rotating shaft mechanism in the fifth state and a schematic partial structural view of area G are shown;

[0039] Figure 16 Schematic diagram of the cross-sectional structure of the rotating shaft mechanism in the first state and a schematic diagram of the partial structure of area H provided in some other embodiments of the present application;

[0040] Figure 17 for Figure 16 A schematic cross-sectional view of the rotating shaft mechanism in the seventh state and a schematic partial structural view of region I are shown;

[0041] Figure 18 A front view of an elastic member provided in some embodiments of the present application;

[0042] Figure 19 A front view of an elastic member provided in some other embodiments of the present application;

[0043] Figure 20 A front view of an elastic member provided in some other embodiments of the present application;

[0044] Figure 21 This is a front view of the elastic member provided in some other embodiments of the present application. DETAILED DESCRIPTION

[0045] In the embodiments of the present application, the terms "first," "second," "third," "fourth," "fifth," "sixth," and "seventh" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first," "second," "third," "fourth," "fifth," "sixth," and "seventh" may explicitly or implicitly include one or more of the features.

[0046] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0047] In the embodiments of the present application, "connection" can be understood as a fixed connection or a movable connection. Fixed connection includes but is not limited to welding, riveting, threaded connection, snap connection, bonding or integral molding, and movable connection can be a slidable connection, a rotatable connection or a slidable and rotatable connection. Among them, "slidable and rotatable connection" refers to a connection method that can slide relative to each other and rotate relative to each other during the relative sliding process. The connection structure corresponding to this connection method can be a high-pair matching structure of line-surface contact or point-surface contact, such as a matching structure of a roller-shaped, ball-shaped, drum-shaped or needle-shaped sliding part and a slide groove, or a cascade structure of a slidable structure and a rotatable structure.

[0048] In the embodiments of the present application, unless otherwise specified, the description of two directions being "consistent" means that the two directions are allowed to be roughly consistent within a certain error range, and the error range can be a range with a deviation angle of less than 5° relative to absolute consistency.

[0049] The present application provides a foldable device, which includes but is not limited to foldable devices such as foldable screen devices, laptop computers, mobile phone holders, etc.

[0050] Foldable screen devices include but are not limited to user equipment (UE) or terminal devices, for example, a foldable screen device can be a tablet computer (portable Android device, PAD), a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device, a vehicle-mounted device, or other mobile or fixed terminal. This application uses the foldable screen device as an example of a handheld device with wireless communication capabilities, such as a mobile phone.

[0051] Folding screen devices include but are not limited to outward-folding folding screen devices and inward-folding folding screen devices.

[0052] See also Figure 1-Figure 3 , Figure 1 A perspective view of a foldable device 100 in an unfolded state provided in some embodiments of the present application. Figure 2 for Figure 1 A perspective view of the foldable device 100 in a folded state is shown, Figure 3 for Figure 1 The foldable device 100 is shown in a three-dimensional diagram in a semi-folded state. In this embodiment, the foldable screen device 100 is an outward-folding foldable screen device.

[0053] The foldable device 100 includes a supporting device 10 and a folding screen 20 .

[0054] The support device 10 includes a first structural member (also known as a first housing) 101, a second structural member (also known as a second housing) 102, and a hinge mechanism 103 connected between the first structural member 101 and the second structural member 102. The hinge mechanism 103 is used to achieve relative rotation between the second structural member 102 and the first structural member 101 to support the foldable device 100 in switching between the unfolded state, the semi-folded state, and the folded state.

[0055] The foldable screen 20 is supported on the first structural member 101, the second structural member 102, and the hinge mechanism 103. The portion of the foldable screen 20 supported on the first structural member 101 is the first portion 201, the portion supported on the second structural member 102 is the second portion 202, and the portion supported on the hinge mechanism 103 is the third portion 203. The foldable screen 20 can be an organic light-emitting diode (OLED) screen, a micro organic light-emitting diode (micro organic light-emitting diode) screen, a quantum dot light-emitting diode (QLED) screen, a liquid crystal display (LCD), etc.

[0056] When the foldable device 100 is in the unfolded state, see Figure 1 The angle between the portion of the folding screen 20 supported on the first structural member 101 and the portion of the folding screen 20 supported on the second structural member 102 is a first angle, and the first angle can be 180°.

[0057] Those skilled in the art will appreciate that the first angle may also be 90°, 120°, 210°, etc., and this application does not impose any limitation thereto. Furthermore, the angles illustrated in this application are all allowed to have slight deviations. For example, the first angle may be 180°, or approximately 180°, such as 170°, 175°, 185°, or 190°, and the same applies to other angles herein. When the foldable device 100 is in the unfolded state, a large screen display can be achieved to provide the user with richer information and a better user experience.

[0058] When the foldable device 100 is in the folded state, see Figure 2 The first structural member 101 and the second structural member 102 can be completely folded to a state where they are substantially parallel to each other (a slight deviation is allowed) and stacked. At this point, the angle between the first structural member 101 and the second structural member 102 can be approximately considered to be 0°. The portion of the foldable screen 20 supported on the first structural member 101 is located on the side of the first structural member 101 facing away from the second structural member 102, and the portion of the foldable screen 20 supported on the second structural member 102 is located on the side of the second structural member 102 facing away from the first structural member 101. The angle between the portion of the foldable screen 20 supported on the first structural member 101 and the portion of the foldable screen 20 supported on the second structural member 102 is a second angle, which can be 360°. It will be understood by those skilled in the art that the second angle can also be 270°, 300°, 340°, etc., and this application does not limit this. When the foldable device 100 is in the folded state, the size of the foldable device 100 is reduced, making it easier to carry, and the foldable screen 20 is exposed, capable of displaying video and image information.

[0059] When the foldable device 100 is in a half-folded state, see Figure 3 The angle between the partial folding screen 20 supported on the first structural member 101 and the partial folding screen 20 supported on the second structural member 102 is a third angle, and the third angle is any angle value between the first angle and the second angle.

[0060] With the development of technology, when users operate the foldable device 100 to rotate the hinge mechanism 103, they need to obtain force feedback to create a damping feeling and enhance the user experience. At the same time, the foldable device 100 needs to be able to maintain one or more stable states to enhance the stability and reliability of the foldable device 100 during use. The stable state can be an unfolded state, a folded state, or at least one semi-folded state.

[0061] In order to achieve the above purpose, a damping structure can be provided in the rotating shaft mechanism 103. Figure 4 , Figure 4 A structural diagram of a rotating shaft mechanism 103 and a partial enlarged diagram of area A in the rotating shaft mechanism 103 are provided in the related art.

[0062] The shaft mechanism 103 includes a shaft base 1, a first swing arm assembly 2A, a second swing arm assembly 2B, a first connecting member (not shown), a second connecting member (not shown) and two damping structures 01. One end of the first swing arm assembly 2A is rotatably connected to the shaft base 1, and the other end is connected to the first connecting member, which is fixedly connected to the first structural member 101 (see Figure 1-Figure 3One end of the second swing arm assembly 2B is rotatably connected to the shaft base 1, and the other end is connected to the second connecting member, which is fixedly connected to the second structural member 102 (see Figure 1-Figure 3 The first swing arm assembly 2A and the second swing arm assembly 2B each include at least one swing arm. The degree of freedom of the system formed by the cooperation of at least one swing arm in each swing arm assembly with the rotating shaft base 1 and the connecting piece is 1, which can ensure the uniqueness and stability of the movement of the swing arm assembly.

[0063] The two damping structures 01 are connected, respectively, between the rotating shaft base 1 and a swing arm 21A in the first swing arm assembly 2A, and between the rotating shaft base 1 and a swing arm 21B in the second swing arm assembly 2B. Each damping structure 01 comprises a first cam 011, a second cam 012, and a spring 013. The first cam 011 is fixedly connected to the swing arm, and the second cam 012 is slidably connected to the rotating shaft base 1. The spring 013 is used to apply an elastic force directed toward the first cam 011 to the second cam 012, thereby engaging the second cam 012 with the first cam 011. When the swing arm assembly rotates relative to the rotating shaft base 1, it can drive the swing arm to rotate relative to the rotating shaft base 1, thereby driving the first cam 011 to rotate relative to the second cam 012. Under the compressive action of the spring 013, the second cam 012 frictionally cooperates with the first cam 011 to generate a damping force.

[0064] See also Figure 5 , Figure 5 A structural diagram of another rotating shaft mechanism 103 and a partial enlarged diagram of area B in the rotating shaft mechanism 103 are provided for the related art. Figure 4 In the rotating shaft mechanism 103 shown in this embodiment, two damping structures 01 are connected, respectively, between a sliding swing arm 22A and a first connecting member 3A within the first swing arm assembly 2A, and between a sliding swing arm 22B and a second connecting member 3B within the second swing arm assembly 2B. Each damping structure 01 also includes a first cam 011, a second cam 012, and a spring 013. The first cam 011 is disposed on the sliding swing arm, and the second cam 012 is disposed on the connecting member. The spring 013 is used to apply an elastic force directed toward the first cam 011 to the second cam 012, causing the second cam 012 to engage with the first cam 011. As the swing arm assembly rotates relative to the rotating shaft base 1, the two sliding swing arms slide relative to the connecting member, thereby causing the first cam 011 to slide relative to the second cam 012. Under the compressive action of the spring 013, the second cam 012 frictionally engages with the first cam 011 to generate a damping force.

[0065] Figure 5 and Figure 6The damping structure 01 in the rotating shaft mechanism 103 shown includes many parts, and is complicated to install and disassemble. It is not only costly and difficult to maintain, but also difficult to further reduce weight.

[0066] To solve the above problem, please refer to Figure 6 and Figure 7 , Figure 6 This is a top view of the rotating shaft mechanism 103 provided in some embodiments of the present application. Figure 7 This is a top view of the rotating shaft mechanism 103 provided in some other embodiments of the present application.

[0067] The rotating shaft mechanism 103 includes a rotating shaft base 1 , a first swing arm assembly 2A, a second swing arm assembly 2B, a first connecting member 3A, a second connecting member 3B and at least one damping structure 4 .

[0068] The hinge base 1, also known as the center beam, provides a positional reference within the hinge mechanism 103. To facilitate the description of the following embodiments, the length of the hinge base 1 is defined as the Y-axis, the width as the X-axis, and the thickness as the Z-axis. The hinge base 1 can be a single, integral structural member or assembled from multiple components.

[0069] The first swing arm assembly 2A is rotatably connected to the shaft base 1 , and the other end is connected to the first connecting member 3A. The first connecting member 3A can be fixedly connected to the first structural member 101 by means of fasteners such as screws.

[0070] The second swing arm assembly 2B is rotatably connected to the shaft base 1 , and the other end is connected to the second connecting member 3B. The second connecting member 3B can be fixedly connected to the second structural member 102 by means of fasteners such as screws.

[0071] The first swing arm assembly 2A and the second swing arm assembly 2B each include at least one swing arm. The degree of freedom of the system formed by at least one swing arm in each swing arm assembly in cooperation with the rotating shaft base 1 and the connecting piece is 1, which can ensure the uniqueness and stability of the movement of the swing arm assembly.

[0072] There are many structural forms of the first swing arm assembly 2A and the second swing arm assembly 2B, which are known to those skilled in the art.

[0073] For example, the first swing arm assembly 2A and the second swing arm assembly 2B may include a rotating swing arm and a sliding swing arm, one end of the rotating swing arm can be rotatably connected to the shaft base 1, and the other end can be rotatably connected to the connecting member, one end of the sliding swing arm can be rotatably connected to the shaft base 1, and the other end can be slidably connected to the connecting member, and the rotation axis of the rotating swing arm relative to the shaft base 1 is parallel to but not colinear with the rotation axis of the sliding swing arm 1 relative to the shaft base 1.

[0074] The rotating shaft mechanism 103 may also include a synchronization mechanism, which is connected between a swing arm in the first swing arm assembly 2A and a swing arm in the second swing arm assembly 2B, such as being connected between the rotating swing arm of the first swing arm assembly 2A and the rotating swing arm of the second swing arm assembly 2B, or being connected between the sliding swing arm of the first swing arm assembly 2A and the sliding swing arm of the second swing arm assembly 2B, so that the first swing arm assembly 2A and the second swing arm assembly 2B rotate synchronously relative to the rotating shaft base 1, driving the first structural member 101 and the second structural member 102 to rotate synchronously, thereby switching the entire machine between the unfolded state, the semi-folded state and the folded state. The synchronization mechanism may be a gear synchronization mechanism or a slider synchronization mechanism, which is not limited here. "Synchronous rotation" means that the directions of rotation are opposite and the angular velocities of rotation are the same.

[0075] The number of the damping structure 4 can be one or more. Figure 6 , the number of the damping structures 4 can be two. For another example, please refer to Figure 7 The number of damping structures 4 can be three. Each damping structure 4 can simultaneously provide damping for the first swing arm assembly 2A and the second swing arm assembly 2B. By selecting the number of damping structures 4, the damping force of the entire machine can be adjusted. When there are multiple damping structures 4, multiple damping structures 4 can be arranged along the length of the shaft base 1, thereby providing a greater damping force for the entire machine.

[0076] See also Figures 8-10 , Figure 8 for Figure 6 and Figure 7 The three-dimensional diagram of the damping structure 4 in the rotating shaft mechanism 103 is shown. Figure 9 for Figure 8 The decomposition structure diagram of the damping structure 4 is shown in FIG. Figure 10 for Figure 6 The cross-sectional structural diagram of the rotating shaft mechanism 103 along the AA direction and the partial structural diagram of the region C are shown. The damping structure 4 includes a fixing seat 41 , a first swing arm 42A, a second swing arm 42B and an elastic member 43 .

[0077] The fixing base 41 serves as a supporting base for other components in the damping structure 4 and can be fixedly connected to the shaft base 1. Optionally, the fixing base 41 can be fixedly connected to the shaft base 1 by means of fasteners such as screws, can be welded to the shaft base 1, or can be integrally formed with at least a portion of the shaft base 1, which is not specifically limited in this application.

[0078] In some embodiments, see Figure 9The fixing base 41 may include a bottom plate 411 and a first side plate 412 and a second side plate 413 disposed on the bottom plate 411. The bottom plate 411 is fixed to the rotating shaft base 1. The first side plate 412 and the second side plate 413 are spaced apart along the length of the rotating shaft base 1. The first side plate 412 and the second side plate 413 are used to connect other components within the damping structure 4. This fixing base 41 has a simple structure and occupies a small space.

[0079] The first swing arm 42A can be a swing arm independent of the first swing arm assembly 2A. In other embodiments, the first swing arm 42A can also be a swing arm in the first swing arm assembly 2A, for example, a rotating swing arm in the first swing arm assembly 2A, or a sliding swing arm in the first swing arm assembly 2A.

[0080] Similarly, the second swing arm 42B can be a swing arm independent of the second swing arm assembly 2B. In other embodiments, the second swing arm 42B can also be a swing arm in the second swing arm assembly 2B, for example, it can be a rotating swing arm in the second swing arm assembly 2B, or a sliding swing arm in the second swing arm assembly 2B.

[0081] See also Figure 8 and Figure 9 The first swing arm 42A is rotatably connected to the fixing base 41 by means of the first rotating shaft 44A, and the first swing arm 42A is connected to the first connecting member 3A. The position where the first swing arm 42A is rotatably connected to the fixing base 41 does not coincide with the position where the first swing arm 42A is connected to the first connecting member 3A. For example, please refer to Figure 10 The first swing arm 42A includes a first rotating end 421A and a first connecting end 422A, which are spaced apart along the length of the first swing arm 42A. The first rotating end 421A is rotatably connected to the fixing base 41 via a first rotating shaft 44A. In some embodiments, see Figure 9 The first rotating end 421A is located between the first side plate 412 and the second side plate 413. The first side plate 412 and the second side plate 413 can limit the first rotating end 421A along the Y-axis direction, preventing the first swing arm 42A from separating from the fixed base 41. The central axis of the first rotating shaft 44A is parallel to the rotation axis of the swing arm in the first swing arm assembly 2A relative to the rotating shaft base 1.

[0082] See also Figure 10, the first connecting end 422A is connected to the first connecting member 3A. Optionally, the first connecting end 422A can be slidably and rotatably connected to the first connecting member 3A. In some embodiments, the first connecting end 422A is provided with a first sliding member 4221A. The first sliding member 4221A can be cylindrical, roller-shaped, needle-shaped, drum-shaped, or roller-shaped. This application uses the first sliding member 4221A in a cylindrical shape for illustrative purposes. The cross-sectional shape of the cylindrical first sliding member 4221A can be circular, elliptical or other irregular shapes, and this application does not make specific limitations on this. The first connecting member 3A is provided with a first slide groove 31A. The first sliding member 4221A can be slidably accommodated in the first slide groove 31A, and can rotate in the first slide groove 31A while sliding along the first slide groove 31A. In this way, the outer peripheral surface of the first sliding member 4221A is in line-surface contact with the inner side surface of the first sliding groove 31A. The first sliding member 4221A can rotate relative to the first sliding groove 31A during the process of sliding along the first sliding groove 31A. This structure is simple and can avoid jamming.

[0083] In other embodiments, the first connection end 422A may also be fixedly connected to the first connection member 3A, or rotatably connected to the first connection member 3A, or slidably connected to the first connection member 3A, and this application does not limit this.

[0084] Likewise, see Figure 8 and Figure 9 The second swing arm 42B is rotatably connected to the fixing base 41 by means of the second rotating shaft 44B, and the second swing arm 42B is connected to the second connecting member 3B. The position where the second swing arm 42B is rotatably connected to the fixing base 41 does not coincide with the position where the second swing arm 42B is connected to the second connecting member 3B. For example, please refer to Figure 10 The second swing arm 42B includes a second rotating end 421B and a second connecting end 422B, which are spaced apart along the length of the second swing arm 42B. The second rotating end 421B is rotatably connected to the fixing base 41 via a second rotating shaft 44B. In some embodiments, see Figure 9 The second rotating end 421B is located between the first side plate 412 and the second side plate 413. The first side plate 412 and the second side plate 413 can limit the second rotating end 421B along the Y-axis direction, preventing the second swing arm 42B from separating from the fixed base 41. The central axis of the second rotating shaft 44B is parallel to the rotation axis of the swing arm in the second swing arm assembly 2B relative to the rotating shaft base 1.

[0085] See also Figure 10, the second connecting end 422B is connected to the second connecting member 3B. Optionally, the second connecting end 422B can be slidably and rotatably connected to the second connecting member 3B. In some embodiments, the second connecting end 422B is provided with a second sliding member 4221B, and the second sliding member 4221B can be cylindrical, roller-shaped, needle-shaped, drum-shaped, or roller-shaped. This application uses the second sliding member 4221B as an example to illustrate that it is cylindrical, and the cross-sectional shape of the cylindrical second sliding member 4221B can be circular, elliptical or other irregular shapes. This application does not make specific limitations on this. The second connecting member 3B is provided with a second slide groove 31B. The second sliding member 4221B can be slidably accommodated in the second slide groove 31B, and can rotate in the second slide groove 31B while sliding along the second slide groove 31B. In this way, the outer peripheral surface of the second sliding member 4221B is in line-surface contact with the inner surface of the second sliding groove 31B. The second sliding member 4221B can rotate relative to the second sliding groove 31B during the process of sliding along the second sliding groove 31B. This structure is simple and can avoid jamming.

[0086] In other embodiments, the second connection end 422B may also be fixedly connected to the second connection member 3B, or rotatably connected to the second connection member 3B, or slidably connected to the second connection member 3B, and this application does not limit this.

[0087] Driven by the shaft base 1, the first swing arm assembly 2A, the second swing arm assembly 2B, the first connecting member 3A, the second connecting member 3B and the synchronization mechanism, the first swing arm 42A and the second swing arm 42B can rotate synchronously between the folded state and the unfolded state.

[0088] See also Figure 10 The first swing arm 42A has a first mating surface MA extending along the circumference of the first rotating shaft 44A, and the second swing arm 42B has a second mating surface MB extending along the circumference of the second rotating shaft 44B. In some embodiments, the first mating surface MA is the outer circumferential surface of the first rotating end 421A, and the second mating surface MB is the outer circumferential surface of the second rotating end 421B. In other embodiments, the first mating surface MA and the second mating surface MB may be other surfaces on the first swing arm 42A and the second swing arm 42B, respectively, and this application does not specifically limit this.

[0089] See also Figure 10The first mating surface MA includes a first area M1A and a second area M2A. The first area M1A and the second area M2A are arranged along the circumference of the first rotating shaft 44A. The first area M1A and the second area M2A can be connected or spaced apart. This application uses the connection of the first area M1A and the second area M2A as an example. The second mating surface MB includes a first mating area M1B and a second mating area M2B. The first mating area M1B and the second mating area M2B are arranged along the circumference of the second rotating shaft 44B. The first mating area M1B and the second mating area M2B can be connected or spaced apart. This application uses the connection of the first mating area M1B and the second mating area M2B as an example.

[0090] During the synchronous rotation of the first swing arm 42A and the second swing arm 42B, please refer to Figure 10 , the first area M1A and the first matching area M1B are in matching contact when the first swing arm 42A and the second swing arm 42B are in the first state. The second area M2A and the second matching area M2B are in matching contact when the first swing arm 42A and the second swing arm 42B are in the second state. The first state is different from the second state, that is, the angle between the first swing arm 42A and the second swing arm 42B in the first state is the first angle, and the angle between the first swing arm 42A and the second swing arm 42B in the second state is the second angle, and the first angle and the second angle are not equal. When the first swing arm 42A and the second swing arm 42B are in the first state, please refer to Figure 10 The distance between the first rotating shaft 44A and the second rotating shaft 44B is a first distance D1. When the first swing arm 42A and the second swing arm 42B are in the second state, the distance between the first rotating shaft 44A and the second rotating shaft 44B is a second distance (not shown). The first distance D1 is less than the second distance. The distance between the first rotating shaft 44A and the second rotating shaft 44B refers to the distance between the center axis of the first rotating shaft 44A and the center axis of the second rotating shaft 44B.

[0091] See also Figure 8 and Figure 9 The elastic member 43 is connected between the first swing arm 42A and the second swing arm 42B. Optionally, the elastic member 43 is connected between the first rotation axis 44A of the first swing arm 42A and the second rotation axis 44B of the second swing arm 42B. During the process of synchronous rotation of the first swing arm 42A and the second swing arm 42B from the first state to the second state, the elastic member 43 is stretched to apply elastic tension to the first swing arm 42A and the second swing arm 42B.

[0092] As a result, during the synchronous rotation of the first and second swing arms 42A, 42B from the first state to the second state, the first mating surface MA and the second mating surface MB, under the elastic tension of the elastic member 43, frictionally engage to generate a damping force. This damping force is fed back to the user, thereby creating a damping feel and enhancing the user's experience. Furthermore, during the synchronous rotation of the first and second swing arms 42A, 42B from the first state to the second state, the distance between the first and second swing arms 42A, 42B increases, and the elastic member 43 is stretched, exerting an elastic tension on the first and second swing arms 42A, 42B. External force is required to drive the synchronous rotation of the first and second swing arms 42A, 42B from the first state to the second state. In the absence of external force, the first and second swing arms 42A, 42B can remain stably in the first state. In other words, the first state is a stable state, thereby enhancing the stability and reliability of the foldable device 100 during use. This damping structure 4 can simultaneously provide damping for the swing arm assemblies on both sides. The damping structure includes fewer parts, is simple to install and disassemble, has low cost, and is easy to maintain, which is conducive to further lightweighting of the entire machine.

[0093] In some embodiments, see Figure 9 At least one of the first rotating shaft 44A and the second rotating shaft 44B is slidably connected to the fixed base 41, so that the distance between the first rotating shaft 44A and the second rotating shaft 44B can be changed between a first distance and a second distance, thereby enabling the first swing arm 42A and the second swing arm 42B to switch between a first state and a second state. In other words, the first rotating shaft 44A can be slidably connected to the fixed base 41, the second rotating shaft 44B can be slidably connected to the fixed base 41, or both the first rotating shaft 44A and the second rotating shaft 44B can be slidably connected to the fixed base 41. The sliding trajectory of the first rotating shaft 44A or the second rotating shaft 44B relative to the fixed seat 41 can be a straight trajectory, an arc trajectory or a broken line trajectory. When the sliding trajectory of the first rotating shaft 44A or the second rotating shaft 44B relative to the fixed seat 41 is a straight trajectory, the straight trajectory can extend in the horizontal direction (X-axis direction) or extend obliquely relative to the X-axis direction. As long as the distance between the first rotating shaft 44A and the second rotating shaft 44B can be changed between the first distance and the second distance, this application does not make any specific restrictions on this.

[0094] For examples, see Figure 9 The fixing seat 41 is provided with a first long hole 41A and a second long hole 41B.

[0095] In some embodiments, please refer to Figure 9The arrangement direction of the first long hole 41A and the second long hole 41B is consistent with the arrangement direction of the first rotating shaft 44A and the second rotating shaft 44B. The extension direction of the first long hole 41A is also consistent with the arrangement direction of the first rotating shaft 44A and the second rotating shaft 44B. The extension direction of the second long hole 41B is also consistent with the arrangement direction of the first rotating shaft 44A and the second rotating shaft 44B. The first rotating shaft 44A can be slidably accommodated in the first long hole 41A, and the second rotating shaft 44B can be slidably accommodated in the second long hole 41B. When the first swing arm 42A and the second swing arm 42B are in the first state, please refer to Figure 10 The first rotating shaft 44A is accommodated in the end of the first elongated hole 41A facing the second elongated hole 41B, and the second rotating shaft 44B is accommodated in the end of the second elongated hole 41B facing the first elongated hole 41A. When the first swing arm 42A and the second swing arm 42B are in the second state, the first rotating shaft 44A is accommodated in the end of the first elongated hole 41A away from the second elongated hole 41B, and the second rotating shaft 44B is accommodated in the end of the second elongated hole 41B away from the first elongated hole 41A. In this way, the length of each of the first elongated hole 41A and the second elongated hole 41B can be set to be shorter, which has less impact on the structural strength of the fixed base 41. In addition, the first rotating shaft 44A and the second rotating shaft 44B can both slide relative to the fixed base 41, thereby improving movement flexibility and preventing jamming.

[0096] In some embodiments, please refer to Figure 9 The number of the first elongated holes 41A and the number of the second elongated holes 41B are both two. One of the two first elongated holes 41A is provided in the first side plate portion 412, and the other is provided in the second side plate portion 413. The projection of the first elongated hole 41A on the first side plate portion 412 onto the second side plate portion 413 substantially overlaps with the first elongated hole 41A on the second side plate portion 413. One of the two second elongated holes 41B is provided in the first side plate portion 412, and the other is provided in the second side plate portion 413. The projection of the second elongated hole 41B on the first side plate portion 412 onto the second side plate portion 413 substantially overlaps with the second elongated hole 41B on the second side plate portion 413. The first rotating shaft 44A is slidably received in the two first elongated holes 41A, and the second rotating shaft 44B is slidably received in the two second elongated holes 41B. The first rotating shaft 44A is supported by the inner walls of the two first long holes 41A, and the second rotating shaft 44B is supported by the inner walls of the two second long holes 41B, thereby improving the support stability.

[0097] The first area M1A, the second area M2A, the first matching area M1B and the second matching area M2B can be planar areas, arc areas or other irregular surfaces, as long as the first distance is less than the second distance.

[0098] In some embodiments, see Figure 10, the first area M1A is a plane area, the second area M2A is an arc surface area, and the second area M2A protrudes in the direction away from the first rotating shaft 44A. Optionally, the center line of the second area M2A can be collinear with the central axis of the first rotating shaft 44A. Similarly, the first matching area M1B is a plane area, the second matching area M2B is an arc surface area, and the second matching area M2B protrudes in the direction away from the second rotating shaft 44B. Optionally, the center line of the second matching area M2B can be collinear with the central axis of the second rotating shaft 44B. This structure is simple, symmetrically arranged, has uniform force, and has better movement stability.

[0099] In some other embodiments, see Figure 11 , Figure 11 This is a schematic structural diagram of the first mating surface MA and the second mating surface MB in the damping structure 4 provided in some other embodiments of the present application. The first region M1A and the second region M2A are both arcuate regions. Both the first region M1A and the second region M2A protrude away from the first rotating shaft 44A. Optionally, the centerline of the first region M1A and the centerline of the second region M2A are both collinear with the central axis of the first rotating shaft 44A. The first mating region M1B and the second mating region M2B are both arcuate regions. The first mating region M1B is recessed toward the second rotating shaft 44B. Optionally, when the first swing arm 42A and the second swing arm 42B are in the first state, the first mating region M1B is in contact with the first region M1A, and the centerline of the first mating region M1B is collinear with the central axis of the first rotating shaft 44A. The second mating region M2B protrudes away from the second rotating shaft 44B. Optionally, the centerline of the second mating region M2B may be collinear with the central axis of the second rotating shaft 44B. This structure is regular and easy to process.

[0100] In the above embodiment, the first state can be an unfolded state, a folded state, or a semi-folded state. The second state can be a folded state, an unfolded state, or a semi-folded state. This embodiment is illustratively described with the first state being the unfolded state and the second state being the semi-folded state. The first state is a stable state, and the second state is an unstable state.

[0101] In some embodiments, see Figure 12 , Figure 12The cross-sectional structural diagram of the rotating shaft mechanism 103 in the first state and the partial structural diagram of the region D provided in some other embodiments of the present application, the first mating surface MA also includes a third region M3A and a fourth region M4A, the third region M3A and the fourth region M4A are arranged along the circumference of the first rotating shaft 44A, the third region M3A and the fourth region M4A can be connected or spaced apart, and the present application is exemplified by the connection between the third region M3A and the fourth region M4A. The fourth region M4A is located on the side of the second region M2A away from the first region M1A, and the third region M3A is located on the side of the fourth region M4A away from the second region M2A. The second region M2A and the fourth region M4A can be coplanar or non-coplanar. The present embodiment is exemplified by the coplanar arrangement of the second region M2A and the fourth region M4A, which cannot be considered as a special limitation to the present application.

[0102] Please continue reading Figure 12 The second mating surface MB also includes a third mating area M3B and a fourth mating area M4B. The third mating area M3B and the fourth mating area M4B are arranged along the circumference of the second rotating shaft 44B. The third mating area M3B and the fourth mating area M4B can be connected or spaced apart. This application is exemplified by the connection of the third mating area M3B and the fourth mating area M4B. The fourth mating area M4B is located on the side of the second mating area M2B away from the first mating area M1B, and the third mating area M3B is located on the side of the fourth mating area M4B away from the second mating area M2B. The second mating area M2B and the fourth mating area M4B can be coplanar or non-coplanar. This embodiment is exemplified by the coplanar arrangement of the second mating area M2B and the fourth mating area M4B, which cannot be considered as a special limitation to this application.

[0103] During the synchronous rotation of the first swing arm 42A and the second swing arm 42B, when the first swing arm 42A and the second swing arm 42B are in the third state, refer to Figure 13 , Figure 13 for Figure 12The schematic cross-sectional structure diagram of the rotating shaft mechanism 103 in the third state and the schematic partial structure diagram of region E are shown. The third region M3A and the third mating region M3B are in mating contact, and the fourth region M4A and the fourth mating region M4B are in mating contact when the first swing arm 42A and the second swing arm 42B are in the fourth state. The first state, the second state, the third state, and the fourth state are each different. That is, the angle between the first swing arm 42A and the second swing arm 42B in the third state is the third angle, and the angle between the first swing arm 42A and the second swing arm 42B in the fourth state is the fourth angle. Any two of the first, second, third, and fourth angles are not equal. When the first swing arm 42A and the second swing arm 42B are in the third state, the distance between the first rotating shaft 44A and the second rotating shaft 44B is the third distance. When the first swing arm 42A and the second swing arm 42B are in the fourth state, the distance between the first rotating shaft 44A and the second rotating shaft 44B is the fourth distance. The third distance is less than the fourth distance.

[0104] During the process of the first swing arm 42A and the second swing arm 42B synchronously rotating from the third state to the fourth state, the elastic member 43 is stretched to apply elastic tension to the first swing arm 42A and the second swing arm 42B.

[0105] As a result, during the synchronous rotation of the first and second swing arms 42A, 42B from the third state to the fourth state, the first mating surface MA and the second mating surface MB, under the elastic tension of the elastic member 43, frictionally engage to generate a damping force. This damping force is fed back to the user, creating a damping feel and enhancing the user experience. Furthermore, during the synchronous rotation of the first and second swing arms 42A, 42B from the third state to the fourth state, the distance between the first and second swing arms 42A, 42B increases, and the elastic member 43 is stretched, exerting an elastic tension on the first and second swing arms 42A, 42B. External force is required to drive the synchronous rotation of the first and second swing arms 42A, 42B from the third state to the fourth state. In the absence of external force, the first and second swing arms 42A, 42B can remain stably in the third state. In other words, the third state is another stable state, thereby enhancing the stability and reliability of the foldable device 100 during use. Thus, the damping structure 4 has two stable states: the first state and the third state.

[0106] The third area M3A, the fourth area M4A, the third matching area M3B and the fourth matching area M4B can be planar areas, arc surface areas or other irregular surfaces, as long as the third distance is less than the fourth distance.

[0107] In some embodiments, see Figure 12 and Figure 13, the third area M3A is a plane area, the fourth area M4A is an arc surface area, and the fourth area M4A protrudes in the direction away from the first rotating shaft 44A. Optionally, the center line of the fourth area M4A can be collinear with the central axis of the first rotating shaft 44A. Similarly, the third matching area M3B is a plane area, the fourth matching area M4B is an arc surface area, and the fourth matching area M4B protrudes in the direction away from the second rotating shaft 44B. Optionally, the center line of the fourth matching area M4B can be collinear with the central axis of the second rotating shaft 44B. This structure is simple, symmetrically arranged, has uniform force, and has better movement stability.

[0108] In some other embodiments, the third region M3A and the fourth region M4A are both arc surface regions. The third region M3A and the fourth region M4A both protrude in a direction away from the first rotating shaft 44A. Optionally, the center line of the third region M3A and the center line of the fourth region M4A are both collinear with the central axis of the first rotating shaft 44A. The third mating region M3B and the fourth mating region M4B are both arc surface regions. The third mating region M3B is recessed toward the second rotating shaft 44B. Optionally, when the first swing arm 42A and the second swing arm 42B are in the third state, the third mating region M3B fits with the third region M3A, and the center line of the third mating region M3B is collinear with the central axis of the first rotating shaft 44A. The fourth mating region M4B protrudes in a direction away from the second rotating shaft 44B. Optionally, the center line of the fourth mating region M4B can be collinear with the central axis of the second rotating shaft 44B. This structure is regular and convenient for processing.

[0109] In the above embodiment, the third state can be an unfolded state, a folded state, or a semi-folded state. This application uses the third state as an example for the folded state, and this application does not specifically limit this. Furthermore, the third distance can be equal to or different from the first distance, and the fourth distance can be equal to or different from the second distance. This application uses the third distance being equal to the first distance and the fourth distance being equal to the second distance for the example description. When the first swing arm 42A and the second swing arm 42B are in the third state, the first rotating shaft 44A is accommodated within the end of the first elongated hole 41A facing the second elongated hole 41B, and the second rotating shaft 44B is accommodated within the end of the second elongated hole 41B facing the first elongated hole 41A. When the first swing arm 42A and the second swing arm 42B are in the fourth state, the first rotating shaft 44A is accommodated within the end of the first elongated hole 41A facing away from the second elongated hole 41B, and the second rotating shaft 44B is accommodated within the end of the second elongated hole 41B facing away from the first elongated hole 41A. In this way, the damping structure 4 has a simple structure and better stability.

[0110] In some embodiments, see Figure 14 , Figure 14The cross-sectional structural diagram of the rotating shaft mechanism 103 in the first state and the partial structural diagram of the region F provided in some other embodiments of the present application, the first mating surface MA also includes the fifth region M5A and the sixth region M6A, the fifth region M5A and the sixth region M6A are arranged along the circumference of the first rotating shaft 44A, the fifth region M5A and the sixth region M6A can be connected or spaced apart, and the present application is exemplified by the connection of the fifth region M5A and the sixth region M6A. The fifth region M5A is located between the fourth region M4A and the second region M2A, and the sixth region M6A is located between the fifth region M5A and the fourth region M4A. The fourth region M4A and the sixth region M6A can be coplanar or non-coplanar. Figure 14 The fourth region M4A and the sixth region M6A are arranged coplanarly for exemplary description, which should not be considered as a special limitation to the present application.

[0111] Please continue reading Figure 14 The second mating surface MB also includes a fifth mating area M5B and a sixth mating area M6B. The fifth mating area M5B and the sixth mating area M6B are arranged along the circumference of the second rotating shaft 44B. The fifth mating area M5B and the sixth mating area M6B can be connected or spaced apart. This application is exemplified by the connection of the fifth mating area M5B and the sixth mating area M6B. The fifth mating area M5B is located between the second mating area M2B and the fourth mating area M4B, and the sixth mating area M6B is located between the fifth mating area M5B and the fourth mating area M4B. The fourth mating area M4B and the sixth mating area M6B can be coplanar or non-coplanar. Figure 14 The fourth matching area M4B and the sixth matching area M6B are arranged coplanarly for exemplary description, which cannot be regarded as a special limitation to the present application.

[0112] During the synchronous rotation of the first swing arm 42A and the second swing arm 42B, when the first swing arm 42A and the second swing arm 42B are in the fifth state, refer to Figure 15 , Figure 15 for Figure 14The cross-sectional structural diagram of the rotating shaft mechanism 103 in the fifth state and the partial structural diagram of the region G are shown. The fifth region M5A is in contact with the fifth mating region M5B. The sixth region M6A is in contact with the sixth mating region M6B when the first swing arm 42A and the second swing arm 42B are in the sixth state. The first state, the second state, the third state, the fourth state, the fifth state, and the sixth state are different. That is, the angle between the first swing arm 42A and the second swing arm 42B in the fifth state is the fifth angle, and the angle between the first swing arm 42A and the second swing arm 42B in the sixth state is the sixth angle. Any two angles among the first angle, the second angle, the third angle, the fourth angle, the fifth angle, and the sixth angle are not equal.

[0113] When the first swing arm 42A and the second swing arm 42B are in the fifth state, the distance between the first rotating shaft 44A and the second rotating shaft 44B is the fifth distance; when the first swing arm 42A and the second swing arm 42B are in the sixth state, the distance between the first rotating shaft 44A and the second rotating shaft 44B is the sixth distance; the fifth distance is smaller than the sixth distance, and the fifth distance is also smaller than the second distance.

[0114] During the process of the first swing arm 42A and the second swing arm 42B synchronously rotating from the fifth state to the sixth state, or synchronously rotating from the fifth state to the second state, the elastic member 43 is stretched to apply elastic tension to the first swing arm 42A and the second swing arm 42B.

[0115] In this way, during the process of the first swing arm 42A and the second swing arm 42B rotating synchronously from the fifth state to the sixth state, or from the fifth state to the second state, under the elastic tension of the elastic part 43, the first mating surface MA and the second mating surface MB frictionally cooperate to generate a damping force, and the damping force is fed back to the user, thereby generating a damping feel and enhancing the user's experience. Furthermore, when the first swing arm 42A and the second swing arm 42B rotate synchronously from the fifth state to the sixth state, or from the fifth state to the second state, the distance between the first swing arm 42A and the second swing arm 42B increases, and the elastic member 43 is stretched, exerting an elastic tension on the first swing arm 42A and the second swing arm 42B. External force is required to drive the first swing arm 42A and the second swing arm 42B to rotate synchronously from the fifth state to the sixth state, or from the fifth state to the second state. In the absence of external force, the first swing arm 42A and the second swing arm 42B can stably remain in the fifth state. In other words, the fifth state is another stable state, thereby enhancing the stability and reliability of the foldable device 100 during use. Thus, the damping structure 4 has three stable states: the first state, the third state, and the fifth state.

[0116] The fifth area M5A, the sixth area M6A, the fifth matching area M5B and the sixth matching area M6B can be planar areas, arc surface areas or other irregular surfaces, as long as the fifth distance is smaller than the sixth distance and the fifth distance is smaller than the second distance.

[0117] In some embodiments, see Figure 14 and Figure 15 , the fifth area M5A is a plane area, the sixth area M6A is an arc surface area, and the sixth area M6A protrudes in the direction away from the first rotating shaft 44A. Optionally, the center line of the sixth area M6A can be collinear with the central axis of the first rotating shaft 44A. Similarly, the fifth matching area M5B is a plane area, the sixth matching area M6B is an arc surface area, and the sixth matching area M6B protrudes in the direction away from the second rotating shaft 44B. Optionally, the center line of the sixth matching area M6B can be collinear with the central axis of the second rotating shaft 44B. This structure is simple, symmetrically arranged, has uniform force, and has better movement stability.

[0118] In some other embodiments, the fifth region M5A and the sixth region M6A are both arc surface regions. The fifth region M5A and the sixth region M6A both protrude in a direction away from the first rotating shaft 44A. Optionally, the center line of the fifth region M5A and the center line of the sixth region M6A are both collinear with the central axis of the first rotating shaft 44A. The fifth mating region M5B and the sixth mating region M6B are both arc surface regions. The fifth mating region M5B is recessed toward the second rotating shaft 44B. Optionally, when the first swing arm 42A and the second swing arm 42B are in the fifth state, the fifth mating region M5B is in contact with the fifth region M5A, and the center line of the fifth mating region M5B is collinear with the central axis of the first rotating shaft 44A. The sixth mating region M6B protrudes in a direction away from the second rotating shaft 44B. Optionally, the center line of the sixth mating region M6B can be collinear with the central axis of the second rotating shaft 44B. This structure is regular and convenient for processing.

[0119] The fifth state can be a semi-folded state. Meanwhile, the fifth distance can be equal to or different from the first and third distances, and the sixth distance can be equal to or different from the second and fourth distances. This application uses the fifth distance being equal to the first and third distances, and the sixth distance being equal to the second and fourth distances for exemplary description. When the first swing arm 42A and the second swing arm 42B are in the fifth state, the first rotating shaft 44A is accommodated within the end of the first long hole 41A facing the second long hole 41B, and the second rotating shaft 44B is accommodated within the end of the second long hole 41B facing the first long hole 41A. When the first swing arm 42A and the second swing arm 42B are in the sixth state, the first rotating shaft 44A is accommodated within the end of the first long hole 41A away from the second long hole 41B, and the second rotating shaft 44B is accommodated within the end of the second long hole 41B away from the first long hole 41A. In this way, the damping structure 4 has a simple structure and better stability.

[0120] In some embodiments, see Figure 16 , Figure 16 Schematic diagrams of the cross-sectional structure of the rotating shaft mechanism 103 in the first state and a partial schematic diagram of the structure of region H are provided in further embodiments of the present application. The first mating surface MA also includes a seventh region M7A, which is located between the fourth region M4A and the sixth region M6A. The second mating surface MB also includes a seventh mating region M7B, which is located between the sixth mating region M6B and the fourth mating region M4B.

[0121] During the synchronous rotation of the first swing arm 42A and the second swing arm 42B, when the first swing arm 42A and the second swing arm 42B are in the seventh state, please refer to Figure 17 , Figure 17 for Figure 16 The cross-sectional structural diagram of the rotating shaft mechanism 103 in the seventh state and the partial structural diagram of area I are shown. The seventh area M7A is in contact with the seventh mating area M7B. When the first swing arm 42A and the second swing arm 42B are in the seventh state, the distance between the first rotating shaft 44A and the second rotating shaft 44B is the seventh distance. The seventh distance is smaller than the fourth distance, and the seventh distance is also smaller than the sixth distance.

[0122] During the process of the first swing arm 42A and the second swing arm 42B synchronously rotating from the seventh state to the fourth state, and from the seventh state to the sixth state, the elastic member 43 is stretched to apply elastic tension to the first swing arm 42A and the second swing arm 42B.

[0123] In this way, during the process of the first swing arm 42A and the second swing arm 42B rotating synchronously from the seventh state to the fourth state, or from the seventh state to the sixth state, under the elastic tension of the elastic part 43, the first mating surface MA and the second mating surface MB frictionally cooperate to generate a damping force, and the damping force is fed back to the user, thereby generating a damping feel and enhancing the user's experience. Furthermore, when the first swing arm 42A and the second swing arm 42B rotate synchronously from the seventh state to the fourth state, or from the seventh state to the sixth state, the distance between the first swing arm 42A and the second swing arm 42B increases, and the elastic member 43 is stretched, exerting an elastic tension on the first swing arm 42A and the second swing arm 42B. External force is required to drive the first swing arm 42A and the second swing arm 42B to rotate synchronously from the seventh state to the fourth state, or from the seventh state to the sixth state. In the absence of external force, the first swing arm 42A and the second swing arm 42B can stably remain in the seventh state. In other words, the seventh state is another stable state, thereby enhancing the stability and reliability of the foldable device 100 during use. Thus, the damping structure 4 has four stable states: the first state, the third state, the fifth state, and the seventh state.

[0124] The seventh area M7A and the seventh matching area M7B can be planar areas, arc surface areas or other irregular surfaces, as long as the seventh distance is smaller than the fourth distance and the seventh distance is smaller than the sixth distance.

[0125] In some embodiments, the seventh region M7A and the seventh matching region M7B are planar regions. This structure is simple, symmetrical, uniformly stressed, and has excellent motion stability.

[0126] In some other embodiments, the seventh region M7A and the seventh mating region M7B are both arc surface regions, and the seventh region M7A protrudes in a direction away from the first rotating shaft 44A. Optionally, the center line of the seventh region M7A is collinear with the central axis of the first rotating shaft 44A. The seventh mating region M7B is recessed toward the second rotating shaft 44B. Optionally, when the first swing arm 42A and the second swing arm 42B are in the seventh state, the seventh mating region M7B is in contact with the seventh region M7A, and the center line of the seventh mating region M7B is collinear with the central axis of the first rotating shaft 44A.

[0127] The seventh state can be a semi-folded state. The seventh distance can be equal to or different from the first, third, and fifth distances. This application uses the seventh distance being equal to the first, third, and fifth distances for illustrative purposes. When the first swing arm 42A and the second swing arm 42B are in the seventh state, the first rotating shaft 44A is accommodated within the end of the first elongated hole 41A facing the second elongated hole 41B, and the second rotating shaft 44B is accommodated within the end of the second elongated hole 41B facing the first elongated hole 41A. This results in a simple structure for the damping structure 4 and improved stability.

[0128] In any of the above embodiments, the elastic member 43 may be a spring, a rubber band, etc., and this application does not make any specific limitation on this.

[0129] In some embodiments, please refer back to Figure 8 and Figure 9 The elastic member 43 may be a spring sheet, the thickness of which aligns with the direction in which the first and second rotating shafts 44A, 44B extend. The spring sheet is connected between the first and second rotating shafts 44A, 44B. The thin spring sheet provides elastic force while reducing the width occupied by the damping structure 4 in the Y-axis direction, thereby increasing flexibility in selecting the location and number of damping structures 4 within the rotating shaft mechanism 103.

[0130] The number of the elastic member 43 can be one or more. The material of the elastic member 43 can be manganese steel, silicon manganese steel, 301 steel, etc.

[0131] In some embodiments, see Figure 8 and Figure 9 There are two elastic members 43, spaced apart along the axial direction of the first rotating shaft 44A and the second rotating shaft 44B. Both elastic members 43 are connected between the first rotating shaft 44A and the second rotating shaft 44B. Axially, the first swing arm 42A and the second swing arm 42B are located between the two elastic members 43. The two elastic members 43 balance the forces acting on the damping structure 4, improving the overall structural stability. Furthermore, the two elastic members 43 provide a greater elastic force and damping force, resulting in greater stability of the damping structure 4 in a steady state.

[0132] For examples, see Figure 8 and Figure 9 The two elastic members 43 are respectively a first elastic member 431 and a second elastic member 432 .

[0133] The first elastic member 431 can be disposed between the first swing arm 42A and the first side plate 412, and between the second swing arm 42B and the first side plate 412. Alternatively, the first elastic member 431 can be disposed on the side of the first side plate 412 facing away from the first swing arm 42A, and on the side of the first side plate 412 facing away from the second swing arm 42B. This embodiment is described by exemplifying the arrangement of the first elastic member 431 on the side of the first side plate 412 facing away from the first swing arm 42A and the side of the first side plate 412 facing away from the second swing arm 42B. This is not to be construed as a special limitation of the present application.

[0134] Similarly, the second elastic member 432 can be disposed between the first swing arm 42A and the second side plate 413, and between the second swing arm 42B and the second side plate 413. Alternatively, the second elastic member 432 can be disposed on the side of the second side plate 413 facing away from the first swing arm 42A, and on the side of the second side plate 413 facing away from the second swing arm 42B. This embodiment is described by exemplifying the second elastic member 432 disposed on the side of the second side plate 413 facing away from the first swing arm 42A, and on the side of the second side plate 413 facing away from the second swing arm 42B. This is not to be construed as a special limitation of the present application.

[0135] The structure of the elastic member 43 will be described in detail below.

[0136] See also Figure 18 , Figure 18 This is a front view of an elastic member 43 provided in some embodiments of the present application. The elastic member 43 includes a first fixing portion 43a, a second fixing portion 43b, and at least one elastic arm 43c connected between the first fixing portion 43a and the second fixing portion 43b.

[0137] The first fixing portion 43a is fixedly connected to the first rotating shaft 44a (see Figure 9 Optionally, the first fixing portion 43a is provided with a first fixing hole 431a, and the first rotating shaft 44a is cooperatively passed through the first fixing hole 431a to achieve a fixed connection between the first fixing portion 43a and the first rotating shaft 44a.

[0138] The second fixing portion 43b is fixedly connected to the second rotating shaft 44b (see Figure 9 Optionally, the second fixing portion 43b is provided with a second fixing hole 431b, and the second rotating shaft 44b is cooperatively passed through the second fixing hole 431b to achieve a fixed connection between the second fixing portion 43b and the second rotating shaft 44b.

[0139] The center of the portion of the first fixing portion 43a connected to the first rotating shaft 44a is the first center O1, which is also the center of the first fixing hole 431a. The center of the portion of the second fixing portion 43b connected to the second rotating shaft 44b is the second center O2, which is also the center of the second fixing hole 431b.

[0140] The arrangement direction of the first fixing portion 43 a and the second fixing portion 43 b is also the arrangement direction of the first center O1 and the second center O2 (specifically, the X-axis direction).

[0141] The at least one elastic arm 43c extends along a plane and is coplanar. Each elastic arm 43c includes at least one first elastic arm segment 431c. The extension direction of the first elastic arm segment 431c intersects or is perpendicular to the arrangement direction of the first fixing portion 43a and the second fixing portion 43b. "Intersecting" means that the two portions form a certain angle, which is greater than 0° and less than 90°.

[0142] In this way, the elastic arm 43c can bend and deform to allow the distance between the center of the portion of the first fixing portion 43a connected to the first rotating shaft 44a and the center of the portion of the second fixing portion 43b connected to the second rotating shaft 44b to change, thereby allowing the distance between the first rotating shaft 44a and the second rotating shaft 44b to change. After deformation, the elastic arm 43c can generate elastic tension on the first rotating shaft 44a and the second rotating shaft 44b. This structure is simple, and because the elastic arm 43c extends along a plane, the thickness can be reduced, forming a sheet-like structure, which helps to reduce the width of the damping structure 4 in the Y-axis direction.

[0143] In the above embodiment, compared to the solution in which the extension direction of the first elastic arm section 431c intersects the arrangement direction of the first fixing portion 43a and the second fixing portion 43b, when the extension direction of the first elastic arm section 431c is perpendicular to the arrangement direction of the first fixing portion 43a and the second fixing portion 43b, the elastic bending deformation ability generated by the first elastic arm section 431c is greater, which can enhance the elastic force of the elastic member 43. Based on this, optionally, please refer to Figure 18 Each elastic arm 43c may further include at least one second elastic arm segment 431d, the extension direction of the second elastic arm segment 431d being consistent with the arrangement direction of the first fixing portion 43a and the second fixing portion 43b. The second elastic arm segment 431d is used to increase the spacing between two adjacent first elastic arm segments 431c, or between the first elastic arm segment 431c and the first fixing portion 43a, or between the first elastic arm segment 431c and the second fixing portion 43b, so that the first elastic arm segment 431c can extend in a direction perpendicular to the arrangement direction of the first fixing portion 43a and the second fixing portion 43b, thereby increasing the elastic deformation capability of the elastic member 43, enhancing the elastic force of the elastic member 43, and improving the damping force of the damping structure 4.

[0144] On the basis of the above embodiment, when there are multiple elastic arms 43c, please refer to Figure 18 At least one second elastic arm segment 431d of the multiple elastic arms 43c can be formed into one piece to reduce the structural complexity of the elastic member 43.

[0145] Several specific structures of the elastic member 43 are listed below.

[0146] In some embodiments, see Figure 18 There are two elastic arms 43c, each of which includes two first elastic arm segments 431c and three second elastic arm segments 431d, which are arranged alternately. The first elastic arm segments 431c extend perpendicularly to the direction in which the first and second fixing portions 43a and 43b are arranged, while the second elastic arm segments 431d extend in the same direction as the direction in which the first and second fixing portions 43a and 43b are arranged. The second elastic arm segment 431d located in the middle of one elastic arm 43c is integrally formed with the second elastic arm segment 431d located in the middle of the other elastic arm 43c.

[0147] In some other embodiments, see Figure 19 , Figure 19 The front view of the elastic member 43 provided in some other embodiments of the present application shows two elastic arms 43c, each of which includes two first elastic arm segments 431c and three second elastic arm segments 431d arranged alternately in sequence. The first elastic arm segments 431c extend perpendicularly to the arrangement direction of the first fixing portion 43a and the second fixing portion 43b, while the second elastic arm segments 431d extend in the same direction as the arrangement direction of the first fixing portion 43a and the second fixing portion 43b. The two second elastic arm segments 431d at the ends of one elastic arm 43c are integrally formed with the two second elastic arm segments 431d at the ends of the other elastic arm 43c.

[0148] In some other embodiments, see Figure 20 , Figure 20 This is a front view of an elastic member 43 provided in yet other embodiments of the present application. The elastic arm 43c is single, and includes two second elastic arm segments 431d and a first elastic arm segment 431c connected between the two second elastic arm segments 431d. The first elastic arm segment 431c extends perpendicular to the alignment of the first and second fixing portions 43a, 43b. The second elastic arm segment 431d extends in the same direction as the alignment of the first and second fixing portions 43a, 43b.

[0149] In some other embodiments, see Figure 21 , Figure 21The front view of the elastic member 43 provided in some other embodiments of the present application shows six elastic arms 43c, each of which includes two second elastic arm segments 431d and two first elastic arm segments 431c connected between the two second elastic arm segments 431d. The extension direction of the first elastic arm segment 431c intersects with the arrangement direction of the first fixing portion 43a and the second fixing portion 43b, and the extension direction of the second elastic arm segment 431d is consistent with the arrangement direction of the first fixing portion 43a and the second fixing portion 43b. The two second elastic arm segments 431d of three of the six elastic arms 43c are respectively formed as one piece, and the two second elastic arm segments 431d of the other three elastic arms 43c are respectively formed as one piece.

[0150] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A damping structure, characterized in that: It includes a fixing seat, a first swing arm, a second swing arm and an elastic member; The first swing arm is rotatably connected to the fixing base via a first rotating shaft, and the second swing arm is rotatably connected to the fixing base via a second rotating shaft, and the first swing arm and the second swing arm can rotate synchronously between a folded state and an unfolded state; The first swing arm has a first mating surface extending along the circumference of the first rotating shaft, and the second swing arm has a second mating surface extending along the circumference of the second rotating shaft; the first mating surface includes a first area and a second area, and the second mating surface includes a first mating area and a second mating area; During synchronous rotation of the first swing arm and the second swing arm, the first area and the first matching area are in matching contact when the first swing arm and the second swing arm are in a first state, and the second area and the second matching area are in matching contact when the first swing arm and the second swing arm are in a second state; the distance between the first rotating shaft and the second rotating shaft when the first swing arm and the second swing arm are in the first state is a first distance, and the distance between the first rotating shaft and the second rotating shaft when the first swing arm and the second swing arm are in the second state is a second distance, and the first distance is smaller than the second distance; The elastic member is connected between the first swing arm and the second swing arm. During the process of synchronous rotation of the first swing arm and the second swing arm from the first state to the second state, the elastic member is stretched and applies elastic tension to the first swing arm and the second swing arm.

2. The damping structure according to claim 1, characterized in that: The first area is a flat area, the second area is an arc area, and the second area is convex in a direction away from the first rotation axis; The first matching area is a plane area, the second matching area is an arc surface area, and the second matching area protrudes in a direction away from the second rotation axis.

3. The damping structure according to claim 1, characterized in that: The first area and the second area are both arc surface areas, and both the first area and the second area are convex in a direction away from the first rotation axis; The first matching area and the second matching area are both arc surface areas. The first matching area is recessed toward the second rotation axis, and the second matching area is protruded in a direction away from the second rotation axis.

4. The damping structure according to any one of claims 1 to 3, characterized in that: The first mating surface further includes a third region and a fourth region arranged along the circumferential direction of the first rotating shaft, the fourth region being located on a side of the second region away from the first region, and the third region being located on a side of the fourth region away from the second region; the second mating surface further includes a third mating region and a fourth mating region arranged along the circumferential direction of the second rotating shaft, the fourth mating region being located on a side of the second mating region away from the first mating region, and the third mating region being located on a side of the fourth mating region away from the second mating region; During synchronous rotation of the first swing arm and the second swing arm, the third region and the third matching region are in matching contact when the first swing arm and the second swing arm are in a third state, and the fourth region and the fourth matching region are in matching contact when the first swing arm and the second swing arm are in a fourth state. The distance between the first rotating shaft and the second rotating shaft when the first swing arm and the second swing arm are in the third state is a third distance, and the distance between the first rotating shaft and the second rotating shaft when the first swing arm and the second swing arm are in the fourth state is a fourth distance, and the third distance is smaller than the fourth distance. During the process of synchronous rotation of the first swing arm and the second swing arm from the third state to the fourth state, the elastic member is stretched and applies elastic tension to the first swing arm and the second swing arm.

5. The damping structure according to claim 4, characterized in that: The first mating surface further includes a fifth area and a sixth area, the fifth area is located between the fourth area and the second area, and the sixth area is located between the fifth area and the fourth area; the second mating surface further includes a fifth mating area and a sixth mating area, the fifth mating area is located between the second mating area and the fourth mating area, and the sixth mating area is located between the fifth mating area and the fourth mating area; During synchronous rotation of the first swing arm and the second swing arm, the fifth region and the fifth matching region are in matching contact when the first swing arm and the second swing arm are in a fifth state, and the sixth region and the sixth matching region are in matching contact when the first swing arm and the second swing arm are in a sixth state. The distance between the first rotating shaft and the second rotating shaft when the first swing arm and the second swing arm are in the fifth state is a fifth distance, and the distance between the first rotating shaft and the second rotating shaft when the first swing arm and the second swing arm are in the sixth state is a sixth distance. The fifth distance is smaller than the sixth distance, and the fifth distance is also smaller than the second distance. During the process of synchronous rotation of the first swing arm and the second swing arm from the fifth state to the sixth state, or synchronous rotation from the fifth state to the second state, the elastic member is stretched and applies elastic tension to the first swing arm and the second swing arm.

6. The damping structure according to claim 5, characterized in that: The first mating surface further includes a seventh area, and the seventh area is located between the fourth area and the sixth area; the second mating surface further includes a seventh mating area, and the seventh mating area is located between the sixth mating area and the fourth mating area; During synchronous rotation of the first swing arm and the second swing arm, the seventh region and the seventh mating region are in mating contact when the first swing arm and the second swing arm are in a seventh state, and a distance between the first rotating shaft and the second rotating shaft when the first swing arm and the second swing arm are in the seventh state is a seventh distance, the seventh distance being smaller than the fourth distance, and the seventh distance being further smaller than the sixth distance; During the process of synchronous rotation of the first swing arm and the second swing arm from the seventh state to the fourth state, or synchronous rotation from the seventh state to the sixth state, the elastic member is stretched and applies elastic tension to the first swing arm and the second swing arm.

7. The damping structure according to claim 6, characterized in that: The first state is an unfolded state, the third state is a folded state, and the fifth state and the seventh state are half-folded states.

8. The damping structure according to any one of claims 1 to 7, characterized in that: At least one of the first rotating shaft and the second rotating shaft is slidably connected to the fixing seat, so that the distance between the first rotating shaft and the second rotating shaft can be changed between the first distance and the second distance.

9. The damping structure according to claim 8, characterized in that: The fixing seat is provided with a first long hole and a second long hole; The arrangement direction of the first long hole and the second long hole is consistent with the arrangement direction of the first rotating shaft and the second rotating shaft, the extension direction of the first long hole is also consistent with the arrangement direction of the first rotating shaft and the second rotating shaft, and the extension direction of the second long hole is also consistent with the arrangement direction of the first rotating shaft and the second rotating shaft; The first rotating shaft can be slidably accommodated in the first long hole, and the second rotating shaft can be slidably accommodated in the second long hole; when the first swing arm and the second swing arm are in the first state, the first rotating shaft is accommodated in the end of the first long hole facing the second long hole, and the second rotating shaft is accommodated in the end of the second long hole facing the first long hole; when the first swing arm and the second swing arm are in the second state, the first rotating shaft is accommodated in the end of the first long hole away from the second long hole, and the second rotating shaft is accommodated in the end of the second long hole away from the first long hole.

10. The damping structure according to any one of claims 1 to 9, characterized in that: The elastic member is a spring sheet, and a thickness direction of the spring sheet is consistent with an extension direction of the first rotating shaft and the second rotating shaft.

11. The damping structure according to any one of claims 1 to 10, characterized in that: There are two elastic members, which are spaced apart along the axial direction of the first rotating shaft and the second rotating shaft, and are both connected between the first rotating shaft and the second rotating shaft; Along the axial directions of the first rotating shaft and the second rotating shaft, the first swing arm and the second swing arm are located between the two elastic members.

12. The damping structure according to claim 10 or 11, characterized in that: The elastic member includes a first fixing portion, a second fixing portion, and at least one elastic arm connected between the first fixing portion and the second fixing portion; The first fixing portion is fixedly connected to the first rotating shaft, the second fixing portion is fixedly connected to the second rotating shaft, the at least one elastic arm is arranged in the same plane, each of the elastic arms includes at least one first elastic arm segment, and the extension direction of the first elastic arm segment intersects or is perpendicular to the arrangement direction of the first fixing portion and the second fixing portion.

13. The damping structure according to claim 12, characterized in that: Each of the elastic arms further includes at least one second elastic arm segment, and an extending direction of the second elastic arm segment is consistent with an arrangement direction of the first fixing portion and the second fixing portion.

14. The damping structure according to claim 13, characterized in that: There are multiple elastic arms, and at least one second elastic arm segment of the multiple elastic arms is formed as one body.

15. A rotating shaft mechanism, characterized in that: include: Rotating shaft base; a first connecting member and a second connecting member, wherein the first connecting member and the second connecting member are respectively located on opposite sides of the rotating shaft base; The damping structure described in any one of claims 1 to 14, wherein the fixed seat of the damping structure is fixedly connected to the rotating shaft base, the first swing arm in the damping structure is connected to the first connecting member, and the second swing arm in the damping structure is connected to the second connecting member.

16. A foldable device, characterized in that: include: a first structural member; a second structural member; The rotating shaft mechanism according to claim 15, wherein the first connecting member of the rotating shaft mechanism is fixedly connected to the first structural member, and the second connecting member of the rotating shaft mechanism is fixedly connected to the second structural member.

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