Pivot mechanism and foldable device

Abstract

The application provides a rotating shaft mechanism and a foldable device, relates to the technical field of foldable devices, and can reduce the width of a damping structure in the extension direction of a rotating shaft, and improve the flexibility of position selection of the damping structure in the rotating shaft mechanism. The rotating shaft mechanism comprises a rotating shaft base, a first connecting piece, a swing arm and a damping structure. The rotating shaft base is provided with a cam surface. The swing arm comprises a rotating part and a connecting part which are fixedly connected, the rotating part is rotatably connected to the rotating shaft base, and the connecting part is connected to the first connecting piece. The swing arm is provided with a mounting hole extending from the connecting part to the rotating part, one end of the mounting hole towards the rotating part is open to form a first opening, and the first opening faces the cam surface. The damping structure is accommodated in the mounting hole and can elastically stretch and contract along the extension direction of the mounting hole. When the swing arm rotates between the unfolded position and the folded position, the damping structure cooperates with the cam surface to provide damping force.

Description

Technical Field

[0001] This application relates to the field of foldable device technology, and more particularly to a pivot mechanism and a foldable device. Background Technology

[0002] Foldable devices such as foldable screen devices and laptops incorporate hinge mechanisms to support the folding of the entire device between an unfolded and folded state. These hinge mechanisms typically also include damping structures to improve the folding feel and allow the device to hover in an unfolded, folded, or semi-folded state. In existing technologies, the width of the damping structure along the hinge's extension direction is usually quite large, requiring significant installation space and limiting the flexibility in positioning the damping structure within the hinge mechanism. Summary of the Invention

[0003] This application provides a pivot mechanism and a foldable device, which can reduce the width of the damping structure in the pivot extension direction and improve the flexibility of the position selection of the damping structure within the pivot mechanism.

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

[0005] In a first aspect, a pivot mechanism is provided, comprising a pivot base, a first damping swing arm assembly rotatably connected to the pivot base, and a first connecting member connected to the first damping swing arm assembly. The pivot base is provided with a cam surface, and the first damping swing arm assembly cooperates with the cam surface to provide damping force.

[0006] The first damping rocker arm assembly includes a rocker arm and a damping structure. The rocker arm includes a rotating part and a connecting part that are fixedly connected. The rotating part is rotatably connected to a rotating shaft base, and the connecting part is connected to a first connecting member. The rocker arm has a mounting hole extending from the connecting part to the rotating part. The end of the mounting hole facing the rotating part is open to form a first opening, which faces the cam surface.

[0007] The damping structure is housed within the mounting hole and is elastically extendable along the extension direction of the mounting hole. When the swing arm rotates between the extended and folded positions, the damping structure, in conjunction with the cam surface, provides damping force.

[0008] Since the swing arm is provided with mounting holes for installing the damping structure, and the mounting holes extend from the connecting part to the rotating part, the size of the mounting holes along the length direction of the rotating shaft base can be designed to be small, which is beneficial to reduce the size of the first damping swing arm assembly along the length direction of the rotating shaft base, so that the installation space required for the first damping swing arm assembly is smaller and the position selection is more flexible.

[0009] Optionally, the damping structure includes a contact element and an elastic element. The contact element is located at the first opening. The elastic element is located on the side of the contact element opposite to the cam surface, and the elastic element is elastically expandable and contractible along the extension direction of the mounting hole. The damping structure engages with the cam surface via the contact element. The contact element can be a rigid element; for example, the material of the contact element can be a material with high hardness and good wear resistance, such as ferritic stainless steel, titanium alloy, carbon fiber composite material, fiberglass, alumina ceramic, and silicon nitride ceramic, to improve the wear resistance of the contact element and extend its service life. Simultaneously, the damping structure generates elastic force via the elastic element. The elastic element can be a structural element with superior elasticity; for example, the material of the elastic element can be spring steel to improve the damping force. Therefore, the damping structure provided in this embodiment can simultaneously achieve both wear resistance and elasticity.

[0010] Optionally, at least the surface of the contact member facing the cam surface is a convex spherical surface. For example, the contact member has a spherical structure. This makes the surface of the contact member that contacts the cam surface smooth, reducing wear and preventing jamming.

[0011] Optionally, the elastic element is a cylindrical helical spring. The axial direction of the cylindrical helical spring is aligned with the extension direction of the mounting hole. The cylindrical helical spring has a larger elastic force and better structural stability, which can improve the damping force and extend its service life.

[0012] Optionally, the pivot base may include a rotating engagement portion and a cam portion. The rotating engagement portion mates with the rotating portion to achieve a rotatable connection. The cam portion is located on one side of the rotating engagement portion and protrudes towards the front of the pivot base; when the rocker arm is in the extended position, the cam portion is located between the rotating engagement portion and the mounting hole. The surface of the cam portion facing away from the rotating engagement portion is the first side surface, and the surface of the cam portion facing the front of the pivot base is the front end surface. The cam portion also includes a transition surface connecting the first side surface and the front end surface. The first side surface, the transition surface, and the front end surface connect to form the aforementioned cam surface.

[0013] Optionally, the rotation axis of the rotating part and the rotating part is the first axis. The distance from the transition surface to the first axis is greater than the distance from the first side surface to the first axis, and the distance from the transition surface to the first axis is also greater than the distance from the front end surface to the first axis. In this way, the damping force variation curve can have a single-peak shape that first increases and then decreases, so that the swing arm can be suspended in the deployed position when no external force is applied.

[0014] Optionally, the first side includes a concave region, for example, a concave spherical region. When the swing arm is in the extended position, at least a portion of the contact element is accommodated within the groove formed by the concave region. This allows the swing arm to be stably suspended in the extended position.

[0015] Optionally, the mounting hole is located in the connecting part, and the rocker arm also includes a transition part fixedly connected between the connecting part and the rotating part. The transition part has a clearance hole that passes through the front end face and the back face of the transition part. When the rocker arm rotates between the unfolded position and the folded position, the cam part extends into or is pulled out of the clearance hole, and the first opening is located on the inner wall surface of the clearance hole. In this way, the thickness of the transition part and the cam part can be avoided from overlapping, which helps to reduce the thickness of the rotating shaft mechanism.

[0016] Optionally, the rocker arm also includes a stop portion disposed on the inner wall surface of the clearance hole. The stop portion has a stop surface extending circumferentially along the first opening and contacting the inner wall surface of the mounting hole. From the mounting hole to the cam surface, the vertical distance from the stop surface to the central axis of the mounting hole gradually decreases. In this way, the stop surface is constricted, which can prevent the contact element from falling off.

[0017] Optionally, the rotation axis of the rotating part that mates with the rotating part is the first axis. A stop is provided on the side of the first opening away from the front end face of the transition portion and on opposite sides of the first opening arranged along the first axis. The end of the stop facing the front end face of the transition portion is open to form a second clearance notch. This prevents the contact element from falling off while avoiding interference between the stop and the contact element and the cam surface, thus improving structural compactness.

[0018] Optionally, the rotating part is an arc-shaped groove disposed within the pivot base. The rotating part is accommodated within the arc-shaped groove and can slide along it. The pivot base also has a first clearance notch, which communicates with the arc-shaped groove. When the swing arm is in the extended position, the transition part is accommodated within the first clearance notch, and the cam part is disposed within the first clearance notch. This improves structural compactness and reduces the length of the swing arm.

[0019] Optionally, the surface of the cam facing the arc-shaped groove is a concave arc surface, which forms part of the inner wall surface of the arc-shaped groove. This increases the sliding contact area between the rotating part and the rotating mating part, avoids stress concentration, and prevents jamming.

[0020] Optionally, the end of the mounting hole furthest from the rotating part is left open to form a second opening. The damping structure also includes a sealing element disposed in the second opening, with the elastic element located between the sealing element and the contact element. In this way, the contact element and the elastic element can be installed into the mounting hole sequentially through the second opening, and then the sealing element can be installed in the second opening. This assembly operation is simple and convenient to implement.

[0021] Optionally, at least a portion of the inner wall surface of the mounting hole is provided with internal threads. The sealing element is a screw, which includes a head and a shank. The head is located on the side of the connecting portion away from the rotating portion, and at least a portion of the shank is located within the mounting hole and screwed into the internal thread. In this way, the sealing element is placed in the second opening by means of a threaded connection. By adjusting the screw engagement length between the sealing element and the internal thread, the elastic force of the elastic element can be adjusted. Moreover, even after the contact element wears, the elastic force can be maintained by adjusting the screw engagement length between the sealing element and the internal thread.

[0022] Optionally, the rotating shaft mechanism also includes a mounting component, which comprises a fixing part and a mounting portion fixed to the fixing part. The fixing part is clamped between the head and the connecting part, and the fixing part has a fixing hole through which the rod passes. The mounting portion is located on the front side of the swing arm and is used to install decorative parts. In this way, the sealing component, in addition to sealing the second opening, is also used to fix the mounting component to the swing arm. This eliminates the need for additional openings or slots on the swing arm to fix the mounting component, thus ensuring the structural integrity of the swing arm. While maintaining the structural strength of the swing arm, the volume of the swing arm can be reduced, which is beneficial for reducing the size of the first damping swing arm assembly. At the same time, the mounting component and the swing arm are detachably connected by the sealing component, which can reduce maintenance costs.

[0023] Optionally, the connecting part includes a main body and a sliding part disposed on the main body, with a mounting hole disposed on the main body. The first connecting member is provided with a slide rail, and the sliding part is slidably connected to the slide rail. When the swing arm rotates between the unfolded position and the folded position, the sliding part can slide along the slide rail. This structure is simple, has better movement stability, and can avoid the bending area of ​​the folding screen, thus preventing damage to the folding screen.

[0024] Optionally, the sliding portion includes a first sliding portion and a second sliding portion located on opposite sides of the main body. The first connector has a mounting groove recessed from its front end towards its back side, and the slide rail includes a first sliding groove and a second sliding groove disposed on opposite side walls of the mounting groove. The main body is slidably accommodated in the mounting groove, the first sliding portion is slidably accommodated in the first sliding groove, and the second sliding portion is slidably accommodated in the second sliding groove. This structure is simple, and the connecting portion is recessed within the first connector, achieving the purpose of reducing thickness.

[0025] Optionally, the back of the main body is provided with a protruding ridge, the extension direction of which is consistent with the extension direction of the mounting hole, and the orthographic projection of the mounting hole on the front end face of the main body overlaps with the orthographic projection of the protruding ridge on the front end face of the main body. The bottom surface of the mounting groove is provided with a clearance groove, the extension direction of which is consistent with the extension direction of the protruding ridge, and the protruding ridge can be slidably accommodated in the clearance groove. In this way, the protruding ridge can ensure the structural strength of the part of the main body where the mounting hole is located, so as to reduce the volume of the main body. At the same time, by using the clearance groove to avoid the protruding ridge, the structural compactness can be ensured, and the size of the assembly structure of the swing arm and the first connecting member can be reduced.

[0026] Optionally, the rotating shaft mechanism further includes a first compensation device and a second compensation device. The first compensation device and the second compensation device are arranged along the length direction of the rotating shaft base, and the swing arm is located between the first compensation device and the second compensation device.

[0027] In a second aspect, a foldable device is provided, which includes a first structural member, a second structural member, and a pivot mechanism as described in any of the above technical solutions, wherein the first structural member is connected to a first connecting member, and the second structural member is connected to a pivot base.

[0028] Since the foldable device provided in this application includes the pivot mechanism described in any of the above technical solutions, both can solve the same technical problem and achieve the same effect. Attached Figure Description

[0029] Figure 1 A bottom view of a foldable device in its unfolded state, provided in some embodiments of this application;

[0030] Figure 2 for Figure 1 A top view of the foldable device in its unfolded state;

[0031] Figure 3 for Figure 1 The front view of the foldable device in its unfolded state;

[0032] Figure 4 for Figure 3 The diagram shows three positions of the foldable device during the flipping process from the unfolded state to the folded state.

[0033] Figure 5 for Figure 2 The diagram shows three positions of the foldable device during the flipping process from the folded state to the unfolded state.

[0034] Figure 6 Schematic diagrams of the structure of a foldable device provided in some embodiments of this application;

[0035] Figure 7 for Figure 6The diagram shows three positions of the foldable device during the flipping process from the unfolded state to the folded state.

[0036] Figure 8 for Figure 1 and Figure 2 A perspective view of the internal support device of the foldable device shown.

[0037] Figure 9 for Figure 8 A three-dimensional view of the rotating shaft mechanism inside the support device and a partial enlarged view of region I inside the rotating shaft mechanism.

[0038] Figure 10 for Figure 9 A schematic diagram showing the exploded structure of the rotating shaft mechanism within region I.

[0039] Figure 11 for Figure 10 The exploded structure shown is a stereoscopic view from a low angle.

[0040] Figure 12 for Figure 9 The diagram shows the assembly structure of the pivot mechanism, the first structural component, the second structural component, and the folding screen during the flipping process from the unfolded state to the folded state.

[0041] Figure 13 for Figure 12 The curve of damping force F1 in the assembly structure shown is as a function of the included angle θ.

[0042] Figure 14 A top view of a rotating shaft mechanism provided for related technologies;

[0043] Figure 15 for Figures 9-11 An exploded view of the first damping swing arm assembly in the rotating shaft mechanism shown.

[0044] Figure 16 for Figure 15 The exploded structural diagram of the first damping swing arm assembly shown is viewed from below.

[0045] Figure 17 for Figure 9 A schematic diagram of the cross-sectional structure of the rotating shaft mechanism shown at line CC;

[0046] Figure 18 for Figure 17 A schematic diagram of the rotating shaft mechanism in a folded state;

[0047] Figure 19 for Figure 17 The diagram shows the rotating shaft mechanism in a semi-folded state.

[0048] Figure 20 for Figure 15 and Figure 16 A perspective view of the second base in the rotating shaft mechanism shown;

[0049] Figure 21 for Figure 20 A three-dimensional view of the second base as seen from direction D1;

[0050] Figure 22 for Figure 15 and Figure 16 A perspective view of the swing arm in the rotating shaft mechanism shown;

[0051] Figure 23 for Figure 22 A stereoscopic view of the swing arm from another perspective;

[0052] Figure 24 for Figure 22 A three-dimensional sectional view of the swing arm shown;

[0053] Figure 25 for Figure 9 A three-dimensional structural diagram of the first compensation device in the rotating shaft mechanism as seen from the front side.

[0054] Figure 26 for Figure 25 The exploded structural diagram of the first compensation device as seen from the front side.

[0055] Figure 27 for Figure 9 A three-dimensional structural diagram of the first compensation device in the rotating shaft mechanism as seen from the rear side.

[0056] Figure 28 for Figure 27 The diagram shows the exploded structure of the first compensation device as viewed from the rear side.

[0057] Figure 29 for Figure 25 A cross-sectional view of the first compensation device in a folded state.

[0058] Figure 30 for Figure 25 A cross-sectional view of the first compensation device in its deployed state.

[0059] Figure 31 for Figure 25 The diagram shows the principle of the first compensation device for compensating for the length difference.

[0060] Figure 32 for Figure 25 A perspective view of the first compensation device shown from another angle;

[0061] Figure 33 for Figure 26The exploded structural diagram of the first compensation device shown from another perspective;

[0062] Figure 34 for Figure 25 A front view of a partial structure of the first compensation device shown;

[0063] Figure 35 for Figure 25 The assembly diagram of the damping component in the first compensation device is shown.

[0064] Figure 36 for Figure 35 The diagram shows the exploded structure of the damping component.

[0065] Figure 37 for Figure 36 An exploded structural diagram of a portion of the damping component shown.

[0066] Figure 38 for Figure 36 A schematic diagram of the back structure of the slider in the damping assembly shown. Detailed Implementation

[0067] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0068] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0069] In the embodiments of this application, "connection" can be understood as a fixed connection or a movable connection. Fixed connections include, but are not limited to, welding, riveting, threaded connections, snap-fitting, bonding, or integral molding, while movable connections include, but are not limited to, rotatable connections and slidable connections.

[0070] In the embodiments of this application, unless otherwise specified, the description of two directions as "consistent" means that the two directions are approximately consistent within a certain error range, and the error range can be a range with an absolute consistency deviation angle of less than 5°.

[0071] This application provides a foldable device, which includes, but is not limited to, foldable screen devices, laptops, mobile phone stands, and other foldable devices.

[0072] Foldable screen devices include, but are not limited to, user equipment (UE) or terminal devices. For example, a foldable screen device can be a portable Android device (PAD), a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device, an in-vehicle device, or other mobile or fixed terminal. This application uses a foldable screen device as an example of a handheld device with wireless communication capabilities, such as a mobile phone.

[0073] Foldable screen devices include, but are not limited to, outward-folding foldable screen devices and inward-folding foldable screen devices.

[0074] Please see Figures 1-3 , Figure 1 This is a bottom view of the foldable device 100 provided in some embodiments of this application in its unfolded state. Figure 2 for Figure 1 The top view of the foldable device 100 in its unfolded state is shown. Figure 3 for Figure 1 The diagram shows a front view of the foldable device 100 in its unfolded state. In this embodiment, the foldable screen device 100 is an outward-folding foldable screen device.

[0075] The foldable device 100 includes a support device 10, a shaft cover 20, a decorative element 30, a decorative element 40, and a folding screen 50.

[0076] The support device 10 includes a first structural member (i.e., a first housing) 101, a second structural member (i.e., a second housing) 102, and a pivot mechanism 103 connecting the first structural member 101 and the second structural member 102. The pivot mechanism 103 is used to realize relative rotation between the second structural member 102 and the first structural member 101 to support the foldable device 100 in switching between an unfolded state and a folded state.

[0077] The support device 10 has opposing front and back sides. When the foldable device 100 is flipped from an unfolded state to a folded state, please refer to... Figure 4 , Figure 4 for Figure 3 The diagram shows three positions of the foldable device 100 during the process of flipping from the unfolded state to the folded state. The foldable device 100 flips from the unfolded state to the semi-folded state and the folded state in sequence. Figure 4(a) is a structural diagram of the foldable device 100 in the unfolded state. In this state, the included angle between the first structural member 101 and the second structural member 102 is approximately 180°. Figure 4 (b) is a structural diagram of the foldable device 100 in a semi-folded state, where the included angle θ between the first structural member 101 and the second structural member 102 is greater than 0° and less than 180°. Figure 4 (c) is a structural diagram of the foldable device 100 in the folded state, where the included angle θ between the first structural member 101 and the second structural member 102 is approximately 0°. During this process, the first structural member 101 and the second structural member 102 rotate toward the front of the support device 10 along directions a1 and a2, respectively, causing the front space of the support device 10 to gradually decrease and the rear space of the support device 10 to gradually increase.

[0078] Conversely, when the foldable device 100 flips from the folded state to the unfolded state, please refer to... Figure 5 , Figure 5 for Figure 2 The diagram shows three positions of the foldable device 100 during the process of flipping from the folded state to the unfolded state. The foldable device 100 flips from the folded state to the semi-folded state and the unfolded state in sequence. Figure 5 (a) is a structural schematic diagram of the foldable device 100 in the folded state. In this state, the included angle between the first structural member 101 and the second structural member 102 is approximately 0°. Figure 5 (b) is a structural diagram of the foldable device 100 in a semi-folded state, where the included angle θ between the first structural member 101 and the second structural member 102 is greater than 0° and less than 180°. Figure 5 (c) is a structural diagram of the foldable device 100 in its unfolded state, where the included angle θ between the first structural member 101 and the second structural member 102 is approximately 180°. During this process, the first structural member 101 and the second structural member 102 rotate toward the back of the support device 10 along directions a3 and a4, respectively, gradually increasing the front space of the support device 10 and gradually decreasing the back space. Here, direction a3 is the opposite of direction a1, and direction a4 is the opposite of direction a2.

[0079] exist Figure 4 and Figure 5 In the illustrated embodiment, the shaft cover 20, the decorative element 30, and the decorative element 40 are located on the front side of the support device 10. The shaft cover 20 covers the rotating shaft mechanism 103, the decorative element 30 covers the gap between the shaft cover 20 and the first structural member 101, and the decorative element 40 covers the gap between the shaft cover 20 and the second structural member 102.

[0080] The foldable screen 50 is located on the back side of the support device 10 and is supported on the first structural member 101, the second structural member 102, and the pivot mechanism 103. The foldable screen 50 can be an organic light-emitting diode (OLED) screen, a micro organic light-emitting diode (MOLED) screen, a quantum dot light-emitting diode (QLED) screen, a liquid crystal display (LCD), etc. The surface of the foldable screen 50 facing away from the support device 10 is the display surface for displaying image information. For the unfolded and folded states of the foldable device 100, please refer to [reference needed]. Figure 4 and Figure 5 The foldable screen 50 has an exposed display surface to facilitate the presentation of images, videos, and other information to users.

[0081] In other embodiments, when the foldable device is an inward-folding foldable screen device, please refer to... Figure 6 , Figure 6 This is a structural schematic diagram of a foldable device 100 provided in some embodiments of this application. The foldable screen 50 is located on the front side of the support device 10, and the shaft cover 20, decorative part 30 and decorative part 40 are located on the back side of the support device 10.

[0082] Please see Figure 7 , Figure 7 for Figure 6 The diagram shows three positions of the foldable device 100 during the process of flipping from the unfolded state to the folded state. The foldable device 100 flips from the unfolded state to the semi-folded state and the folded state in sequence. Figure 7 (a) is a structural diagram of the foldable device 100 in the unfolded state. In this state, the included angle θ between the first structural member 101 and the second structural member 102 is approximately 180°, and the display surface of the foldable screen 50 is exposed to present images, videos and other information to the user. Figure 7 (b) is a schematic diagram of the foldable device 100 in a semi-folded state. In this state, the included angle θ between the first structural member 101 and the second structural member 102 is greater than 0° and less than 180°. Figure 7 (c) is a structural diagram of the foldable device 100 in the folded state. In this state, the included angle θ between the first structural member 101 and the second structural member 102 is approximately 0°. The foldable screen 50 is hidden inside the support device 10. The support device 10 can protect the foldable screen 50 and prevent scratches.

[0083] The embodiments described below are exemplified by foldable screen devices with outward folding mechanism 100.

[0084] Please see Figure 8 , Figure 8 for Figure 1 and Figure 2 A perspective view of the internal support device 10 of the foldable device 100 shown.

[0085] It should be noted that, for ease of description, in the embodiments below, unless otherwise specified, the "front side" used to describe each component in the rotating shaft mechanism 103 refers to the side of the described component facing the front of the support device 10, the "front end face" refers to the surface of the described component facing the front of the support device 10, the "back side" refers to the side of the described component facing the back of the support device 10, and the "back side" refers to the surface of the described component facing the back of the support device 10.

[0086] Please see Figures 9-11 , Figure 9 for Figure 8 The diagram shows a perspective view of the rotating shaft mechanism 103 within the support device 10 and a partial enlarged view of region I within the rotating shaft mechanism 103. Figure 10 for Figure 9 The diagram shows an exploded view of the portion of the rotating shaft mechanism 103 within region I. Figure 11 for Figure 10 The exploded structure shown is a perspective view from a low angle. The pivot mechanism 103 may include a pivot base 1, a first damping swing arm assembly 2, a first connector 3, a second damping swing arm assembly 4, and a second connector 5.

[0087] The pivot base 1, also known as the center beam, provides a positional reference within the pivot mechanism 103. The pivot base 1 can be a single structural component or assembled from multiple parts. The pivot base 1 is elongated; therefore, for ease of description, an XYZ coordinate system is established. For an example, please refer to [link to example]. Figure 9 The width direction of the pivot base 1 is defined as the X-axis, the length direction as the Y-axis, and the thickness direction as the Z-axis. It is understood that the coordinate system of the pivot base 1 can be flexibly set according to actual needs, and no specific limitations are made here.

[0088] In some embodiments, please refer to Figure 10 and Figure 11 The pivot base 1 may include a first base 11 and a second base 12. The first base 11 is located in front of the second base 12, and the first base 11 and the second base 12 may be fixedly connected by at least one screw 13.

[0089] In other embodiments, the first base 11 and the second base 12 may also be fixedly connected by welding, snap-fitting or other methods, and this application does not make specific limitations in this regard.

[0090] In this way, the pivot base 1 is formed by assembling at least the first base 11 and the second base 12, which facilitates the assembly of other structural components (such as the first damping swing arm assembly 2 and the second damping swing arm assembly 4) on the pivot base 1.

[0091] One end of the first damping swing arm assembly 2 and one end of the second damping swing arm assembly 4 are rotatably connected to the pivot base 1. Optionally, please refer to... Figure 9 The first damping swing arm assembly 2 and the second damping swing arm assembly 4 are staggered along the Y-axis direction, which can reduce the width of the pivot base 1 in the X-axis direction, which is beneficial to the thinning of the foldable device when it is in the folded state.

[0092] The other end of the first damping swing arm assembly 2 is connected to the first connector 3. Optionally, the other end of the first damping swing arm assembly 2 can be slidably connected to the first connector 3, or can be rotatably or fixedly connected to the first connector 3. The following embodiments are further descriptions based on the premise that the other end of the first damping swing arm assembly 2 can be slidably connected to the first connector 3.

[0093] The first connector 3 is connected to the first structural member 101. Optionally, the first connector 3 can be fixedly connected to the first structural member 101 by means of at least one screw 6.

[0094] The other end of the second damping swing arm assembly 4 is connected to the second connector 5. Optionally, the other end of the second damping swing arm assembly 4 can be slidably connected to the second connector 5, or can be rotatably or fixedly connected to the second connector 5. The following embodiments are further descriptions based on the premise that the other end of the second damping swing arm assembly 4 can be slidably connected to the second connector 5.

[0095] The second connector 5 is connected to the second structural member 102. Optionally, the second connector 5 can be fixedly connected to the second structural member 102 by means of at least one screw 7.

[0096] When the foldable device 100 flips between the unfolded and folded states, the first damping swing arm assembly 2 and the second damping swing arm assembly 4 can rotate relative to the pivot base 1. The first damping swing arm assembly 2 and the second damping swing arm assembly 4 can slide relative to the first connector 3 and the second connector 5, respectively, to adjust the distance between the pivot base 1 and the first structural member 101 and between the pivot base 1 and the second structural member 102. This provides stable support for the foldable screen 50 while preventing damage to the foldable screen 50. Moreover, the first damping swing arm assembly 2 and the second damping swing arm assembly 4 can also cooperate with the pivot base 1 to generate damping force, allowing the foldable device 100 to hover in at least one of the folded, semi-folded, and unfolded states.

[0097] For an example, please refer to Figure 12 , Figure 12 for Figure 9 The diagram shows the assembly structure of the pivot mechanism 103, the first structural component 101, the second structural component 102, and the folding screen 50 during the process of flipping from the unfolded state to the folded state. Figure 12 (a) is a schematic diagram of the assembly structure in the unfolded state. In this state, the included angle θ between the first structural component 101 and the second structural component 102 is approximately 180°. Figure 12 (b) is a schematic diagram of the assembly structure in a semi-folded state. In this state, the included angle θ between the first structural member 101 and the second structural member 102 is greater than 0° and less than 180°. Figure 12 (c) is a schematic diagram of the assembly structure in the folded state. In this state, the included angle θ between the first structural member 101 and the second structural member 102 is approximately 0°.

[0098] During the process of flipping the assembly structure from the unfolded state to the folded state, the first structural component 101 and the second structural component 102 rotate towards the front of the support device along directions a1 and a2, respectively. The first connecting component 3, the second connecting component 5, the first damping swing arm assembly 2, and the second damping swing arm assembly 4 also rotate towards the front of the support device. Simultaneously, the first connecting component 3 and the second connecting component 5 slide relative to the first damping swing arm assembly 2 and the second damping swing arm assembly 4 along directions a5 and a6, respectively. This shortens the distance between the pivot base 1 and the first structural component 101, and between the pivot base 1 and the second structural component 102, thus avoiding the bending area of ​​the folding screen 50 and preventing damage to the folding screen 50.

[0099] Furthermore, the damping force generated by the first damping swing arm assembly 2 in conjunction with the pivot base 1 is defined as F1, and the damping force generated by the second damping swing arm assembly 4 in conjunction with the pivot base 1 is defined as F2. Based on this, please refer to... Figure 13 , Figure 13 for Figure 12 The diagram shows the curve of damping force F1 changing with the included angle θ in the assembly structure shown. During the process of the foldable device 100 flipping from the unfolded state to the folded state, the included angle θ gradually decreases from 180° to 0°. The curve of damping force F1 shows a single-peak shape, first increasing and then decreasing. During this process, the curve of F2 also shows a single-peak shape, first increasing and then decreasing (not shown in the diagram). This allows the foldable device 100 to hover in the unfolded state without external force, while the transition from the unfolded state to the folded state requires external force.

[0100] Of course, the F1 curve is not limited to Figure 13 The single-peak shape shown can also be multi-peak, so that the foldable device 100 can be suspended in at least one semi-folded state in addition to being in the unfolded state.

[0101] Conversely, during the flipping process from a folded state to an unfolded state, the first structural member 101 and the second structural member 102 rotate toward the back of the support device along the opposite directions of direction a1 and direction a2, respectively. The first connecting member 3, the second connecting member 5, the first damping swing arm assembly 2, and the second damping swing arm assembly 4 also rotate toward the back of the support device. Simultaneously, the first connecting member 3 and the second connecting member 5 slide relative to the first damping swing arm assembly 2 and the second damping swing arm assembly 4 along the opposite directions of direction a5 and direction a6, respectively. This extends the distance between the pivot base 1 and the first structural member 101, and between the pivot base 1 and the second structural member 102, to support the folding screen 50 and ensure its flatness.

[0102] It should be noted that when the foldable device 100 is an inward-folding foldable screen device, when the foldable device 100 flips from the unfolded state to the folded state, the first connecting member 3 and the second connecting member 5 can slide in the opposite directions of a5 and a6, respectively, to extend the distance between the pivot base 1 and the first structural member 101, and between the pivot base 1 and the second structural member 102, thereby avoiding the foldable screen 50 and preventing damage to the foldable screen 50. When the foldable device 100 flips from the folded state to the unfolded state, the first connecting member 3 and the second connecting member 5 can slide in the directions a5 and a6, respectively, to shorten the distance between the pivot base 1 and the first structural member 101, and between the pivot base 1 and the second structural member 102, thereby supporting the foldable screen 50 and ensuring the flatness of the foldable screen 50. The sliding process is the opposite of that of an outward-folding foldable screen device.

[0103] In related technologies, the width of the damping swing arm assembly along the Y-axis is typically large; for an example, please refer to [link / reference needed]. Figure 14 , Figure 14 The diagram provides a top view of a pivot mechanism for related technologies. The first damping swing arm assembly 2 includes a housing structure formed by assembling an upper housing and a lower housing 2A, and a serpentine elastic structure 2B disposed within the housing structure. The first damping swing arm assembly 2 requires a large installation space, resulting in limited flexibility in position selection along the Y-axis within the pivot mechanism 103. Simultaneously, the damping swing arm assembly is typically thicker along the Z-axis, leading to a greater thickness of the pivot mechanism 103 and even the entire machine along the Z-axis, which is detrimental to achieving a thinner profile.

[0104] Based on this Figures 9-11 The first damping swing arm assembly 2 and the second damping 4 in the rotating shaft mechanism 103 shown can solve the above-mentioned technical problems.

[0105] The structure of the first damping swing arm assembly 2 will be described in detail below. The structure of the second damping swing arm assembly 4 can be the same as that of the first damping swing arm assembly 2, and will not be described in detail here. Moreover, in some other embodiments, the rotating shaft mechanism 103 may not have the second damping swing arm assembly 4 and the second connecting member 5, and may directly connect the second structural member 102 to the rotating shaft base 1, or connect the second structural member 102 to the rotating shaft base 1 with the help of other intermediate structures. This application does not make specific limitations in this regard.

[0106] Please see Figure 15 and Figure 16 , Figure 15 for Figures 9-11 An exploded view of the first damping swing arm assembly 2 in the rotating shaft mechanism 103 shown. Figure 16 for Figure 15 The diagram shows the exploded structure of the first damping swing arm assembly 2 from a downward viewing angle.

[0107] The first damping swing arm assembly 2 may include a swing arm 21, a damping structure 22, and a mounting part 23.

[0108] The swing arm 21 includes a rotating part 211 and a connecting part 212 that are fixedly connected.

[0109] The rotating part 211 is rotatably connected to the pivot base 1 to achieve a rotatable connection between the first damping swing arm assembly 2 and the pivot base 1. Accordingly, please refer to... Figure 15 and Figure 16 The rotating shaft base 1 includes a rotating mating part A, which is rotatably connected to the rotating part 211.

[0110] In some embodiments, please refer to Figure 15 and Figure 16 The back surface of the first base 11 includes a convex region A1, and the front surface of the second base 12 includes a concave region A2. At least a portion of the convex region A1 is opposite to and spaced apart from at least a portion of the concave region A2, and the at least a portion of the convex region A1 and the at least a portion of the concave region A2 define an arcuate groove, which forms the aforementioned rotary mating part A.

[0111] The rotating part 211 is housed in an arc-shaped groove and can slide along the arc-shaped groove to achieve a rotatable connection between the rotating part 211 and the rotating shaft base 1. Since the rotating mating part A is an arc-shaped groove structure rather than a full circle, the thickness of the rotating shaft base 1 and even the entire machine can be reduced.

[0112] In the above embodiments, the rotating part 211 may be in the shape of a roller, a cylinder, a needle roller, a block, a ball, etc. In some embodiments, please continue reading. Figure 15 and Figure 16The rotating part 211 is in the shape of an arc plate, and includes a concave arc surface m1 and a convex arc surface m2 facing each other. The rotating part 211 is housed in an arc-shaped groove, and the concave arc surface m1 faces the convex surface region A1, and the convex arc surface m2 faces the concave surface region A2.

[0113] In this way, as the rotating part 211 slides along the arc-shaped groove, the concave arc surface m1 and the convex surface area A1 slide relative to each other, and the convex arc surface m2 and the concave surface area A2 slide relative to each other. This can avoid stress concentration, ensure smooth sliding, and prevent jamming and other situations.

[0114] Of course, in other embodiments, the rotating part 211 can also be a bushing, and the rotating mating part A can be a rotating shaft; or, the rotating part 211 can be a rotating shaft, and the rotating mating part A can be a bushing. The rotating shaft is rotatably fitted inside the bushing. This also achieves a rotatable connection between the rotating part 211 and the rotating mating part A.

[0115] In some embodiments, please refer to Figure 15 and Figure 16 The swing arm 21 also includes a transition portion 213 that is fixedly connected between the rotating portion 211 and the connecting portion 212.

[0116] The pivot base 1 is provided with a first clearance notch 15, which communicates with the aforementioned arc-shaped groove. When the swing arm 21 is in the extended position, the transition part 213 is accommodated within the first clearance notch 15. This structure is simple and has a reasonable layout.

[0117] In some embodiments, please refer to the following: Figure 16 The swing arm 21 is provided with a first stop portion 213a. Optionally, the first stop portion 213a is provided in the transition portion 213.

[0118] The rotating shaft base 1 is provided with a second stop portion 16, and optionally, the second stop portion 16 is provided on the second base 12.

[0119] When the swing arm 21 is in the extended position, please refer to Figure 17 , Figure 17 for Figure 9 The diagram shows a cross-sectional view of the rotating shaft mechanism 103 at line CC. The first stop portion 213a contacts the second stop portion 16 to prevent the swing arm 21 from continuing to rotate relative to the rotating shaft base 1 towards the back side of the rotating shaft base 1, thereby achieving the flattening stop function. This structure is simple and easy to implement.

[0120] In some embodiments, please refer back to the reference. Figure 15 and Figure 16 The end of the rotating part 211 away from the connecting part 212 is provided with a third stop part 211a.

[0121] The second base 12 is provided with a relief groove 12a that is recessed from the concave region A2 toward the back of the second base 12, and a fourth stop portion 12b is formed on the inner side of the relief groove 12a facing the connecting portion 212.

[0122] When the swing arm 21 rotates from the unfolded position to the folded position, the third stop portion 211a slides within the clearance groove 12a. When the swing arm 21 is in the folded position, please refer to... Figure 18 , Figure 18 for Figure 17 The schematic diagram of the rotating shaft mechanism 103 in its folded state shows that the third stop part 211a and the fourth stop part 12b cooperate to prevent the swing arm 21 from continuing to rotate relative to the rotating shaft base 1 towards the front of the rotating shaft base 1, thereby realizing the folding stop function. This structure is simple and easy to implement.

[0123] In some embodiments, please continue reading Figure 15 and Figure 16 The second base 12 is also provided with a first protrusion 17 and a second protrusion 18 protruding towards the front side of the pivot base 1. When the swing arm 21 is in the extended position, the first protrusion 17 and the second protrusion 18 are located between the first base 11 and the connecting part 212. The first protrusion 17 and the second protrusion 18 are arranged at intervals along the Y-axis direction, and a first clearance notch 15 is provided between the first protrusion 17 and the second protrusion 18.

[0124] Therefore, please refer to the following carefully. Figure 15 At least a portion of the concave region A2 is provided in the first protrusion 17 and the second protrusion 18, thereby increasing the overlap between the swing arm 21 and the pivot base 1 when the swing arm 21 is in the folded position, ensuring smooth sliding, avoiding stress concentration, and preventing jamming.

[0125] Please continue reading. Figure 15 and Figure 16 The connecting portion 212 is connected to the first connecting member 3. Optionally, the connecting portion 212 is slidably connected to the first connecting member 3 to achieve a slidable connection between the first damping swing arm assembly 2 and the first connecting member 3. In other embodiments, the connecting portion 212 may also be rotatably or fixedly connected to the first connecting member 3 to achieve a rotatable or fixed connection between the first damping swing arm assembly 2 and the first connecting member 3. The following embodiments are further described based on the premise that the connecting portion 212 is slidably connected to the first connecting member 3.

[0126] In some embodiments, please refer to Figure 15 and Figure 16The connecting part 212 includes a main body 212a and a sliding part 212b disposed on the main body 212a. The first connecting member 3 is provided with a slide rail 31, which includes, but is not limited to, a grooved slide rail and a saddle-type slide rail. The sliding part 212b is slidably connected to the slide rail 31. When the swing arm 21 rotates relative to the pivot base 1 between the unfolded position and the folded position, the sliding part 212b slides along the slide rail 31. This structure is simple and has excellent motion stability.

[0127] Based on the above, optionally, the sliding part 212b includes a first sliding part 212b1 and a second sliding part 212b2 located on opposite sides of the main body part 212a.

[0128] The first connector 3 has a mounting groove 32 recessed from the front end of the first connector 3 to the back end of the first connector 3. The slide rail 31 includes a first slide groove 311 and a second slide groove 312 disposed on two opposite side walls of the mounting groove 32.

[0129] The main body 212a is slidably accommodated in the mounting groove 32, the first sliding part 212b1 is slidably accommodated in the first sliding groove 311, and the second sliding part 212b2 is slidably accommodated in the second sliding groove 312.

[0130] This structure is simple, and the connecting part 212 is recessed inside the first connecting member 3, which can achieve the purpose of reducing the thickness.

[0131] Please refer to this carefully. Figure 15 and Figure 17 A cam surface B is provided on the pivot base 1. The damping structure 22 is disposed inside the swing arm 21 and cooperates with the cam surface B to generate the aforementioned damping force F1.

[0132] The swing arm 21 is provided with a mounting hole 214 extending from the connecting portion 212 to the rotating portion 211. The mounting hole 214 is used to mount the damping structure 22. In some embodiments, the mounting hole 214 may be provided on the connecting portion 212. Optionally, the mounting hole 214 may be provided on the main body portion 212a of the connecting portion 212.

[0133] Of course, in other embodiments, the mounting hole 214 may also be provided on the sliding part 212b of the connecting part 212, or at other positions of the swing arm 21. This application does not make specific limitations on this.

[0134] Please see Figure 17 The mounting hole 214 is open at one end facing the rotating part 211 to form a first opening C1, and the first opening C1 faces the cam surface B.

[0135] The damping structure 22 is housed within the mounting hole 214 and is elastically extendable and retractable along the extension direction of the mounting hole 214. When the swing arm 21 rotates between the unfolded position and the folded position, the damping structure 22 cooperates with the cam surface B to provide the aforementioned damping force F1.

[0136] Since the swing arm 21 is provided with a mounting hole 214 for mounting the damping structure 22, the mounting hole 214 extends from the connecting part 212 to the rotating part 211. The size of the mounting hole 214 along the Y-axis direction can be designed to be smaller, which is beneficial to reduce the size of the first damping swing arm assembly 2 along the Y-axis direction, so that the installation space required for the first damping swing arm assembly 2 is smaller and the position selection is more flexible.

[0137] In the above embodiments, the damping structure 22 can have various structural forms. For example, the damping structure 22 can be an elastic element as a whole, which includes, but is not limited to, rubber body, silicone body, spring steel sheet and helical spring. Alternatively, the damping structure 22 can be a combination of rigid element and elastic element.

[0138] In some embodiments, please refer to Figures 15-17 The damping structure 22 includes a contact element 221 and an elastic element 222.

[0139] Contact 221 is located at the first opening C1. Elastic member 222 is located on the side of contact 221 opposite to the cam surface B. Elastic member 222 is elastically extendable and retractable along the extension direction of mounting hole 214, so that when the swing arm 21 rotates between the folded position and the unfolded position, contact 221 can contact and press the cam surface B to generate the aforementioned damping force F1.

[0140] In this way, the damping structure 22 engages with the cam surface B via the contact element 221. The contact element 221 can be a rigid component; for example, the material of the contact element 221 can be a material with high hardness and good wear resistance, such as ferritic stainless steel, titanium alloy, carbon fiber composite material, fiberglass, alumina ceramic, and silicon nitride ceramic, to improve the wear resistance of the contact element 221 and extend its service life. Simultaneously, the damping structure 22 generates elastic force via the elastic element 222. The elastic element 222 can be a structural component with superior elasticity; for example, the material of the elastic element 222 can be spring steel to enhance the damping force. Therefore, the damping structure 22 provided in this embodiment can simultaneously achieve both wear resistance and elasticity.

[0141] In the above embodiments, the contact element 221 can be needle-shaped, columnar, block-shaped, or spherical. For some embodiments, please refer to... Figures 15-17 The surface of the contact element 221 facing at least the cam surface B is a convex spherical surface; optionally, the contact element 221 has a spherical structure. This ensures that the surface of the contact element 221 that contacts the cam surface B is smooth, reducing wear and preventing jamming.

[0142] The elastic element 222 can be a spring steel sheet or a coil spring. See also the following embodiments: Figures 15-17 The elastic element 222 is a cylindrical helical spring, and the axial direction of the cylindrical helical spring is consistent with the extension direction of the mounting hole 214. The cylindrical helical spring has a large elastic force and excellent structural stability, which can improve the damping force and extend the service life.

[0143] In some embodiments, please refer to Figures 15-17 The pivot base 1 also includes a cam portion 14. The cam portion 14 is disposed on one side of the rotary mating portion A and protrudes towards the front of the pivot base 1. When the rocker arm 21 is in the extended position, the cam portion 14 is located between the rotary mating portion A and the mounting hole 214.

[0144] Optional, please refer to Figure 15 and Figure 16 The cam portion 14 is disposed within the first clearance notch 15. This improves the structural compactness and reduces the length of the swing arm 21.

[0145] The surface of the cam portion 14 facing away from the rotating mating portion A is the first side surface B1, and the surface of the cam portion 14 facing the front side of the rotating shaft base 1 is the front end surface B2. The cam portion 14 also includes a transition surface B3 connecting the first side surface B1 and the front end surface B2. The first side surface B1, the transition surface B3, and the front end surface B2 are connected to form the cam surface B.

[0146] When the swing arm 21 is in the extended position, please refer to Figure 17 The first opening C1 faces the first side B1, and the contact element 221 contacts the first side B1. When the swing arm 21 is in the semi-folded position, please refer to... Figure 19 , Figure 19 for Figure 17 The diagram shows the structure of the pivot mechanism 103 in a semi-folded state, with the first opening C1 facing the transition surface B3, and the contact element 221 in contact with the transition surface B3. When the swing arm 21 is in the folded position, please refer to... Figure 18 The first opening C1 faces the front end face B2, and the contact element 221 is spaced apart from the front end face B2. This structure is simple and easy to implement.

[0147] In some embodiments, please refer to Figure 17 The rotation axis of the rotating mating part A and the rotating part 211 is the first axis O1, which extends along the Y-axis. The distance from the transition surface B3 to the first axis O1 is greater than the distance from the first side surface B1 to the first axis O1, and the distance from the transition surface B3 to the first axis O1 is also greater than the distance from the front end surface B2 to the first axis O1.

[0148] It should be noted that the distance from the first side surface B1 to the first axis O1 refers to the distance from any position of the first side surface B1 to the first axis O1. Similarly, the distance from the front end surface B2 to the first axis O1 refers to the distance from any position of the front end surface B2 to the first axis O1, and the distance from the transition surface B3 to the first axis O1 refers to the distance from any position of the transition surface B3 to the first axis O1.

[0149] Based on this, the distance from the transition surface B3 to the first axis O1 is greater than the distance from the first side surface B1 to the first axis O1. In other words, the distance from any position of the transition surface B3 to the first axis O1 is greater than the distance from any position of the first side surface B1 to the first axis O1. It can also be understood that the minimum distance from the transition surface B3 to the first axis O1 is greater than the maximum distance from the first side surface B1 to the first axis O1.

[0150] Similarly, the distance from the transition surface B3 to the first axis O1 is greater than the distance from the front end surface B2 to the first axis O1. In other words, the distance from any position of the transition surface B3 to the first axis O1 is greater than the distance from any position of the front end surface B2 to the first axis O1. It can also be understood that the minimum distance from the transition surface B3 to the first axis O1 is greater than the maximum distance from the front end surface B2 to the first axis O1.

[0151] In this way, the curve of the damping force F1 can be shown as Figure 13 The single-peak shape shown, which first increases and then decreases, allows the swing arm 21 to be suspended in the unfolded position when no external force is applied.

[0152] In some embodiments, please refer to Figure 20 , Figure 20 for Figure 15 and Figure 16 The diagram shows a perspective view of the second base 12 in the rotating shaft mechanism 103. The surface of the cam portion 14 facing the arc-shaped slide groove is a concave arc surface B4, which also forms part of the inner wall surface of the arc-shaped slide groove. In other words, the concave arc surface B4 forms part of the concave area A2. This increases the sliding contact area between the rotating portion 211 and the rotating mating portion A, avoids stress concentration, and prevents jamming.

[0153] In some embodiments, please refer to Figure 21 , Figure 21 for Figure 20 The second base 12 is shown in a perspective view from direction D1. The first side surface B1 includes a concave region B11, which, for example, is a concave spherical region. When the swing arm 21 is in the extended position, at least a portion of the contact member 221 is accommodated within the groove formed by the concave region B11. This allows the swing arm 21 to be stably suspended in the extended position.

[0154] In some embodiments, please refer to Figures 22-24 , Figure 22 for Figure 15 and Figure 16 A perspective view of the swing arm 21 in the rotating shaft mechanism 103 shown. Figure 23 for Figure 22 The image shown is a three-dimensional view of the swing arm 21 from another perspective. Figure 24 for Figure 22 The diagram shows a perspective sectional view of the swing arm 21. The transition portion 213 has a clearance hole 213b that extends through the front end face and the back face of the transition portion 213. When the swing arm 21 rotates between the unfolded and folded positions, the cam portion 14 extends into or exits the clearance hole 213b, and the first opening C1 is located on the inner wall surface of the clearance hole 213b. This avoids the thickness of the transition portion 213 and the cam portion 14 overlapping, which helps to reduce the thickness of the rotating shaft mechanism 103.

[0155] In some embodiments, please refer to Figure 23 and Figure 24 The swing arm 21 also includes a stop portion 215 disposed on the inner wall surface of the clearance hole 213b. The stop portion 215 has a stop surface 215a extending circumferentially along the first opening C1 and contacting the inner wall surface of the mounting hole 214. From the mounting hole 214 to the rotating part 211, the vertical distance from the stop surface 215a to the central axis O2 of the mounting hole 214 gradually decreases. In this way, the stop surface 215a is constricted, which can prevent the contact member 221 from falling off.

[0156] In some embodiments, please refer to Figure 23 and Figure 24 The stop portion 215 is disposed on the side of the first opening C1 away from the front end face of the transition portion 213 and on opposite sides of the first opening C1 arranged along the first axis O1. The side of the stop portion 215 facing the front end face of the transition portion 213 is open to form a second clearance notch. In this way, while preventing the contact member 221 from falling off, the stop portion 215 can be prevented from interfering with the contact member 221's contact with the cam surface B, thereby improving the structural compactness.

[0157] Of course, in other embodiments, the stop portion 215 may also extend 360° circumferentially along the first opening C1.

[0158] In some embodiments, please refer back to the reference. Figures 15-17 The end of the mounting hole 214 away from the rotating part 211 is open to form a second opening C2. Based on this, the damping structure 22 also includes a sealing member 223. The sealing member 223 is disposed in the second opening C2, and the elastic member 222 is located between the sealing member 223 and the contact member 221.

[0159] In this way, the contact element 221 and the elastic element 222 can be installed into the mounting hole 214 through the second opening C2 one after the other, and then the sealing element 223 can be installed in the second opening C2. This assembly operation is simple and convenient.

[0160] Of course, in other embodiments, the end of the mounting hole 214 away from the rotating part 211 can also be closed. Based on this, the contact member 221 and the elastic member 222 can be installed into the mounting hole 214 through the first opening C1. This application does not specifically limit this.

[0161] The sealing element 223 can be in the form of a block, column, mesh, etc. The sealing element 223 can be welded to the second opening C2, or it can be threaded, bonded, or snapped onto the second opening C2.

[0162] In some embodiments, please refer to Figure 17 At least a portion of the inner wall surface of the mounting hole 214 is provided with internal threads. The sealing element 223 can be a screw, which includes a head and a shank. The head is located on the side of the connecting portion 212 away from the rotating portion 211, and at least a portion of the shank is located within the mounting hole 214 and is screwed into the internal thread.

[0163] In this way, by using a threaded connection, the sealing element 223 is set in the second opening C2. By adjusting the helical engagement length between the sealing element 223 and the internal thread, the elastic force of the elastic element 222 can be adjusted. Moreover, after the contact element 221 is worn, the elastic force can also be maintained by adjusting the helical engagement length between the sealing element 223 and the internal thread.

[0164] Please continue reading. Figures 15-17 Installer 23 is used for installation. Figure 1 and Figure 2 Decorative parts 30.

[0165] Mounting component 23 is fixed to the swing arm 21. Optionally, mounting component 23 can be fixed to the swing arm 21 by welding, snap-fitting, threaded connection or integral molding.

[0166] In some embodiments, please refer to Figures 15-17 The mounting component 23 may include a fixing part 231 and a mounting part 232 fixed to the fixing part 231. The fixing part 231 is clamped between the head and the connecting part 212, and the fixing part 231 has a fixing hole 231a, through which the rod part passes. The mounting part 232 is disposed on the front side of the swing arm 21, and the mounting part 232 is used to mount the decorative part 30. Optionally, the mounting part 232 has at least one connecting hole 232a. For example, the number of connecting holes 232a is two, and the mounting part 232 mounts the decorative part 30 through the at least one connecting hole 232a.

[0167] In this way, the sealing component 223, in addition to sealing the second opening C2, also serves to fix the mounting component 23 to the swing arm 21. This eliminates the need for additional openings or slots on the swing arm 21 to fix the mounting component 23, thus ensuring the structural integrity of the swing arm 21. While maintaining the structural strength of the swing arm 21, its volume can be reduced, which is beneficial for reducing the dimensions of the first damping swing arm assembly 2 along the Y-axis and Z-axis directions. Furthermore, the sealing component 223 enables a detachable connection between the mounting component 23 and the swing arm 21, reducing maintenance costs.

[0168] In some embodiments, please refer to Figures 15-17 Both the fixing part 231 and the mounting part 232 are plate-shaped, and the fixing part 231 and the mounting part 232 are approximately perpendicular. Based on this, the mounting member 23 also includes a bent part 233 fixedly connected between the fixing part 231 and the mounting part 232. A fixing hole 231a extends from the fixing part 231 through the bent part 233 to the mounting part 232, and the fixing hole 231a also penetrates the edge of the fixing part 231 away from the mounting part 232. In this way, the fixing hole 231a reduces the amount of solid material at the bent part 233, and the bending force required during bending is smaller. At the same time, the height of the fixing part 231 along the Z-axis can be set to be smaller, which is beneficial for the thinning of the first damping swing arm assembly 2 and even the entire machine.

[0169] In some embodiments, please continue reading Figures 15-17 The back of the main body 212a is provided with a protruding ridge 212c, which protrudes from the back of the main body 212a toward the front end face away from the main body 212a. The extending direction of the protruding ridge 212c is consistent with the extending direction of the mounting hole 214. The orthographic projection of the mounting hole 214 onto the front end face of the main body 212a overlaps with the orthographic projection of the protruding ridge 212c onto the front end face of the main body 212a. In this way, the protruding ridge 212c can ensure the structural strength of the part of the main body 212a where the mounting hole 214 is provided, thereby reducing the volume of the main body 212a.

[0170] Based on the above, please refer to the following: Figure 15 The bottom surface of the mounting groove 32 is provided with a clearance groove 33. The extension direction of the clearance groove 33 is consistent with the extension direction of the protruding ridge 212c, and the protruding ridge 212c can be slidably accommodated in the clearance groove 33. In this way, by using the clearance groove 33 to avoid the protruding ridge 212c, the structural compactness can be ensured and the size of the assembly structure between the swing arm 21 and the first connecting member 3 can be reduced.

[0171] In some embodiments, please refer back to the reference. Figure 9In addition to the aforementioned shaft base 1, first damping swing arm assembly 2, first connector 3, second damping swing arm assembly 4, and second connector 5, the rotating shaft mechanism 103 also includes a first compensation device 1031 and a second compensation device 1032 arranged along the length direction of the shaft base 1. The first damping swing arm assembly 2 and the second damping swing arm assembly 4 are located between the first compensation device 1031 and the second compensation device 1032.

[0172] The first compensation device 1031 and the second compensation device 1032 are used to rotatably connect the first structural member 101 to the second structural member 102, compensate the effective support length of the rotating shaft mechanism 103 for the folding screen 50, provide damping force so that the whole machine can be suspended in the unfolded state or the folded state, and at the same time realize the synchronous rotation of the first structural member 101 and the second structural member 102.

[0173] The structure of the first compensation device 1031 will be described in detail below. The structure of the second compensation device 1032 can be the same as that of the first compensation device 1031, and will not be described in detail here.

[0174] The first compensation device 1031 includes a compensation component, a synchronization component, and a damping component. The specific structure of the compensation component will be introduced first below.

[0175] Please see Figures 25-28 , Figure 25 for Figure 9 A three-dimensional structural diagram of the first compensation device 1031 in the rotating shaft mechanism 103 as seen from the front side. Figure 26 for Figure 25 The exploded structural diagram of the first compensation device 1031 as seen from the front side. Figure 27 for Figure 9 A three-dimensional structural schematic diagram of the first compensation device 1031 in the rotating shaft mechanism 103 as seen from the rear side. Figure 28 for Figure 27 The diagram shows the exploded structure of the first compensation device 1031 as viewed from the rear side.

[0176] The compensation components may include the aforementioned pivot base 1, first support 7A, second support 7B, first swing arm assembly 8A, and second swing arm assembly 8B.

[0177] The first support member 7A and the second support member 7B are respectively disposed on both sides of the rotating shaft base 1 in the width direction. One side of the first support member 7A in the width direction is rotatably connected to the other side of the rotating shaft base 1 in the width direction via a first connecting shaft 71A, allowing the first support member 7A to rotate relative to the rotating shaft base 1 about the axis of the first connecting shaft 71A. One side of the second support member 7B in the width direction is rotatably connected to the other side of the rotating shaft base 1 in the width direction via a second connecting shaft 71B, allowing the second support member 7B to rotate relative to the rotating shaft base 1 about the axis of the second connecting shaft 71B. Thus, the first support member 7A and the second support member 7B can rotate relative to the rotating shaft base 1 respectively.

[0178] Furthermore, the first swing arm assembly 8A and the second swing arm assembly 8B are respectively disposed on both sides of the pivot base 1 in the width direction. The first swing arm assembly 8A connects the first support member 7A to the first structural member 101, allowing the first structural member 101 to rotate relative to the first support member 7A. The second swing arm assembly 8B connects the second support member 7B to the second structural member 102, allowing the second structural member 102 to rotate relative to the second support member 7B. Thus, the first structural member 101 can rotate relative to the pivot base 1 through the first swing arm assembly 8A in conjunction with the first support member 7A, and the second structural member 102 can rotate relative to the pivot base 1 through the second swing arm assembly 8B in conjunction with the second support member 7B, thereby enabling the first structural member 101 and the second structural member 102 to rotate relative to the pivot base 1 respectively, ultimately allowing the support device 10 to switch between an unfolded state and a folded state.

[0179] The first swing arm assembly 8A and the second swing arm assembly 8B are used to adjust the effective support length of the first compensation device 1031 on the folding screen 50, so that the effective support length of the first compensation device 1031 is equal to the screen length of the folding screen 50 in both the unfolded and folded states, avoiding length differences and preventing irreversible damage to the folding screen 50.

[0180] The following, in conjunction with the accompanying drawings, will explain in detail the reasons for the aforementioned length difference and the principle of this application for compensating for the length difference.

[0181] Please see Figures 29-31 , Figure 29 for Figure 25 A cross-sectional view of the first compensation device 1031 in a folded state. Figure 30 for Figure 25 A cross-sectional view of the first compensation device 1031 in its deployed state. Figure 31 for Figure 25 The diagram shows the principle of the first compensation device 1031 for compensating for length differences.

[0182] Please see Figure 29 and Figure 31 When the first compensation device 1031 is in the folded state, the effective support length of the pivot base 1, the first support member 7A, the second support member 7B, the first swing arm assembly 8A, and the second swing arm assembly 8B for the folded screen 50 is the length of the U-shaped path from point A to point B. Please refer to [link / reference]. Figure 30 and Figure 31 When the first compensation device 1031 is in the unfolded state, the effective support length of the pivot base 1, the first support member 7A, the second support member 7B, the first swing arm assembly 8A, and the second swing arm assembly 8B for the folding screen 50 becomes the straight line length from point A1 to point B1. The U-shaped path length in the folded state becomes the length of the multi-segment arc path from point A1 to point B1 in the unfolded state. The length of the multi-segment arc path is equal to the length of the U-shaped path, but the length of the multi-segment arc path is greater than the straight line length from point A1 to point B1.

[0183] Therefore, when the first compensation device 1031 undergoes a shape transformation, a length difference will occur in the effective support length of the folding screen 50. This length difference is the difference between the length of the U-shaped path and the straight line length. This length difference needs to be compensated for during the rotation of the electronic device to prevent damage to the folding screen 50 caused by compression and stretching during rotation.

[0184] Please see Figures 29-31 Both the first swing arm assembly 8A and the second swing arm assembly 8B are designed as telescopic structures, which allows for adjustment of the effective support length of each compensation component for the folding screen 50 as a whole. Figure 30 The unfolded state shown is compared to Figure 29 In the folded state shown, the first swing arm assembly 8A extends away from the first support member 7A by a length of L1; the second swing arm assembly 8B extends away from the second support member 7B by a length of L2. The sum of the lengths L1 and L2 can be set to be equal to the difference between the length of the U-shaped path and the length of the straight line, thereby compensating for the aforementioned length difference. This ensures that the effective support length of the first compensation device 1031 for the entire folded screen 50 is the same in both the unfolded and folded states. Consequently, the effective support length of the support device 10 is equal to the screen length of the folded screen 50 in both the unfolded and folded states.

[0185] The main structural components of the first swing arm assembly 8A and the second swing arm assembly 8B, as well as the structure for achieving length difference compensation, are described below with reference to the accompanying drawings. Please refer back to the reference. Figures 25-28The first swing arm assembly 8A includes a first body support 81A, a first compensation support 82A, and a first drive component 83A. One side of the first body support 81A in the width direction is rotatably connected to the other side of the first support member 7A in the width direction via a third connecting shaft 72A. The first compensation support 82A is slidably connected to the first body support 81A, so that the first compensation support 82A and the first body support 81A can rotate relative to the pivot base 1 via the first support member 7A, and the first compensation support 82A can slide towards or away from the first support member 7A. The first drive component 83A is configured to drive the first compensation support 82A to slide relative to the first body support 81A. The first compensation support 82A is fixedly connected to the first structural member 101 of the foldable device 100.

[0186] The second swing arm assembly 8B includes a second body support 81B, a second compensation support 82B, and a second drive component 83B. One side of the second body support 81B in the width direction is rotatably connected to the other side of the second support member 7B in the width direction via a fourth connecting shaft 72B. The second compensation support 82B is slidably connected to the second body support 81B, allowing both the second compensation support 82B and the second body support 81B to rotate relative to the pivot base 1 via the second support member 7B, and the second compensation support 82B can slide towards or away from the second support member 7B. The second drive component 83B is configured to drive the second compensation support 82B to slide relative to the second body support 81B. The second compensation support 82B is used for fixed connection with the second structural member 102 of the foldable device 100.

[0187] Therefore, by extending and retracting each compensation bracket in the first compensation bracket 82A and the second compensation bracket 82B and the corresponding main body bracket, the effective support length of the first compensation device 1031 supporting the folding screen 50 can be adjusted, so that the effective support length of the first compensation device 1031 is the same in the unfolded state and the folded state. This makes the effective support length of the support device 10 the same in the unfolded state and the folded state, thereby compensating for the length difference between the effective support length of the support device 10 and the length of the folding screen 50, avoiding squeezing or stretching the folding screen 50, and improving the reliability and lifespan of the folding screen 50.

[0188] The structure of the first drive component 83A and the second drive component 83B will be described in detail below.

[0189] Please see Figure 32 and in conjunction with reference Figures 25-28 , Figure 32 for Figure 25The first compensation device 1031 is shown in a perspective view from another angle. The first driving component 83A can be configured as a first slider 84A. One end of the first slider 84A is rotatably connected to the rotating shaft base 1, and the other end is slidably connected to the first body support 81A, so that the first slider 84A can slide relative to the first body support 81A along the width direction of the first body support 81A. This ensures that the motion mode of the assembly composed of the rotating shaft base 1, the first support member 7A, the first body support 81A, and the first slider 84A is unique during state changes, resulting in superior stability. Moreover, by sliding the first slider 84A relative to the first body support 81A, the first compensation bracket 82A can also slide relative to the first body support 81A in conjunction with the sliding of the first compensation bracket 82A relative to the first body support 81A.

[0190] The second driving component 83B can be configured as a second slider 84B. One end of the second slider 84B is rotatably connected to the rotating shaft base 1, and the other end is slidably connected to the second body support 81B. This allows the second slider 84B to slide relative to the second body support 81B along the width direction of the second body support 81B. Consequently, the motion mode of the assembly consisting of the rotating shaft base 1, the second support 7B, the second body support 81B, and the second slider 84B is unique during state changes, resulting in superior stability. Furthermore, the sliding of the second slider 84B relative to the second body support 81B can also trigger the sliding of the second compensation support 82B relative to the second body support 81B.

[0191] In some embodiments, please refer to Figure 32 and in conjunction with reference Figures 25-28 The first slider 84A is connected to the first compensation bracket 82A via a first linkage mechanism 85A, so that the sliding of the first slider 84A relative to the first body bracket 81A can be linked by the first linkage mechanism 85A to the sliding of the first compensation bracket 82A relative to the first body bracket 81A. The sliding direction of the first slider 84A relative to the first body bracket 81A is opposite to the sliding direction of the first compensation bracket 82A relative to the first body bracket 81A.

[0192] The second slider 84B is connected to the second compensation bracket 82B via a second linkage mechanism 85B, so that the sliding of the second slider 84B relative to the second main body bracket 81B can be linked by the second linkage mechanism 85B to the sliding of the second compensation bracket 82B relative to the second main body bracket 81B. The sliding direction of the second slider 84B relative to the second main body bracket 81B is opposite to the sliding direction of the second compensation bracket 82B relative to the second main body bracket 81B.

[0193] Each slider transmits power to its corresponding compensation bracket through its respective linkage mechanism. The use of linkage mechanisms for power transmission has the advantages of simple and compact transmission component structure, high transmission efficiency, and convenient assembly.

[0194] In one embodiment, please continue reading Figure 32 Each first linkage mechanism 85A is rotatably connected to the first body support 81A, and each second linkage mechanism 85B is rotatably connected to the second body support 81B.

[0195] In some embodiments, please continue reading Figure 32 The first linkage mechanism 85A includes one or more first links 851A. For example, there are two first links 851A. Each first link 851A is rotatably connected to the first body bracket 81A, and one end of each first link 851A is rotatably and slidably connected to the first slider 84A, and the other end is rotatably and slidably connected to the first compensation bracket 82A.

[0196] The second linkage mechanism 85B includes one or more second links 851B. For example, there are two second links 851B. Each second link 851B is rotatably connected to the second body bracket 81B. One end of each second link 851B is rotatably and slidably connected to the second slider 84B, and the other end is rotatably and slidably connected to the second compensation bracket 82B.

[0197] In some embodiments, please refer to Figure 33 , Figure 33 for Figure 26 The exploded structural diagram of the first compensation device 1031 shown from another perspective shows that each first link 851A is provided with a first pin hole 852A, and a first pivot shaft hole 818A is provided on the first body bracket 81A at the position corresponding to each first pin hole 852A. A first pin (not shown in the figure) is inserted into each first pin hole 852A and the corresponding first pivot shaft hole 818A so that each first link 851A can be rotatably connected to the first body bracket 81A. Each first connecting rod 851A has a slotted hole 853A at both ends, and a first pin hole 852A is located between the slotted holes 853A at both ends. A first connecting post 842A is provided on the first slider 84A at the position corresponding to the slotted hole 853A at one end of each first connecting rod 851A. The first connecting post 842A is rotatably and slidably connected in the corresponding slotted hole 853A, so that one end of each first connecting rod 851A is rotatably and slidably connected to the first slider 84A. A second connecting post 828A is provided on the first compensation bracket 82A at the position corresponding to the slotted hole 853A at the other end of each first connecting rod 851A. The second connecting post 828A is rotatably and slidably connected in the corresponding slotted hole 853A, so that the other end of each first connecting rod 851A is rotatably and slidably connected to the first compensation bracket 82A.

[0198] Each second link 851B is provided with a second pin hole 852B. A second pivot hole 818B is provided on the second body bracket 81B at the position corresponding to each second pin hole 852B. A second pin (not shown in the figure) is inserted into each second pin hole 852B and the corresponding second pivot hole 818B, so that each second link 851B is rotatably connected to the second body bracket 81B. Each second link 851B has a slotted hole 853B at both ends. The second pin hole 852B is located between the slotted holes 853B at both ends. A third connecting post 842B is provided on the second slider 84B at the position corresponding to the slotted hole 853B at one end of each second link 851B. The third connecting post 842B is rotatably and slidably connected to the corresponding slotted hole 853B, so that one end of each second link 851B is rotatably and slidably connected to the second slider 84B. A fourth connecting post 828B is provided on the second compensation bracket 82B at the position of the strip hole 853B corresponding to the other end of each second link 851B. The fourth connecting post 828B is rotatably and slidably connected in the corresponding strip hole 853B, so that the other end of each second link 851B is rotatably and slidably connected to the second compensation bracket 82B.

[0199] In this application, the connection method between each link and the corresponding body support, and between each slider and the corresponding compensation support, is simple and easy to assemble and disassemble.

[0200] In some embodiments, please refer to Figure 34 , Figure 34 for Figure 25 The front view of a partial structure of the first compensation device 1031 is shown. When the first compensation device 1031 is in the unfolded state, the first connecting post 842A and the second connecting post 828A respectively abut against the outer end of the strip hole 853A on the corresponding first connecting rod 851A, and the third connecting post 842B and the fourth connecting post 828B respectively abut against the outer end of the strip hole 853B on the corresponding second connecting rod 851B.

[0201] When the first compensation device 1031 is in the folded state, the first connecting post 842A and the second connecting post 828A respectively abut against the inner end of the strip hole 853A on the corresponding first connecting rod 851A, and the third connecting post 842B and the fourth connecting post 828B respectively abut against the inner end of the strip hole 853B on the corresponding second connecting rod 851B.

[0202] When the first compensation device 1031 is folded from the unfolded state to the folded state, the first connecting post 842A and the second connecting post 828A slide from the outer end of the corresponding slot 853A on the first connecting rod 851A to the inner end, and the third connecting post 842B and the fourth connecting post 828B slide from the outer end of the corresponding slot 853B on the second connecting rod 851B to the inner end, thereby shortening the effective support length of the first compensation device 1031 for the folded screen 50. When the first compensation device 1031 is folded from the folded state to the unfolded state, the first connecting post 842A and the second connecting post 828A slide from the inner end of the corresponding slot 853A on the first connecting rod 851A to the outer end, and the third connecting post 842B and the fourth connecting post 828B slide from the inner end of the corresponding slot 853B on the second connecting rod 851B to the outer end, thereby extending the effective support length of the first compensation device 1031 for the folded screen 50. Therefore, during the process of compensating for the difference in the effective support length of the folding screen 50 by the first compensation device 1031 during the state change, the folding screen 50 is prevented from being damaged by compression and stretching during rotation.

[0203] In the above embodiments, in each first connecting rod 851A, the outer end of each strip hole 853A is the end of the strip hole 853A away from the first pin hole 852A, and the inner end of each strip hole 853A is the end of the strip hole 853A close to the first pin hole 852A.

[0204] In each of the second connecting rods 851B, the outer end of each slot 853B is the end of the slot 853B that is away from the second pin hole 852B, and the inner end of each slot 853B is the end of the slot 853B that is close to the second pin hole 852B.

[0205] The above mainly describes the compensation components of the first compensation device 1031 in detail. The following describes the synchronization components and damping components of the first compensation device 1031 in conjunction with the accompanying drawings.

[0206] In some embodiments, please refer back to the reference. Figure 25 and Figure 26 The first compensation device 1031 may also include a synchronization component 6, which drives the first swing arm component 8A and the second swing arm component 8B to rotate synchronously relative to the rotating shaft base 1.

[0207] The specific structure of the synchronization component 6 is not limited. In one exemplary structure, the synchronization component 6 may include a first synchronization swing arm 6A and a second synchronization swing arm 6B. One end of the first synchronization swing arm 6A is rotatably connected to one side of the rotating shaft base 1, and the other end is slidably connected to the first body bracket 81A. One end of the second synchronization swing arm 6B is rotatably connected to the other side of the rotating shaft base 1, and the other end is slidably connected to the second body bracket 81B. The first synchronization swing arm 6A and the second synchronization swing arm 6B rotate synchronously and in opposite directions. In some embodiments, one end of the first synchronization swing arm 6A and one end of the second synchronization swing arm 6B are provided with gears, which directly mesh, or an even number of intermediate gears are provided between the two gears, so that one end of the first synchronization swing arm 6A and the second synchronization swing arm 6B rotate synchronously and in opposite directions. The two synchronization swing arms rotate synchronously in opposite directions, enabling the compensation components of the first compensation device 1031 to rotate synchronously, improving the user experience.

[0208] Please see Figures 35-38 , Figure 35 for Figure 25 Assembly diagram of the damping component in the first compensation device 1031 shown. Figure 36 for Figure 35 The diagram shows the exploded structure of the damping component. Figure 37 for Figure 36 An exploded structural diagram of a portion of the damping component shown. Figure 38 for Figure 36 A schematic diagram of the back structure of the slider in the damping assembly shown.

[0209] Please see Figure 35 and in conjunction with reference Figure 33 In one embodiment, a first damping component 9A is provided on the first body support 81A, and the first damping component 9A is configured to apply a compressive force to the first slider 84A along the length direction of the first body support 81A. Accordingly, please refer back to the previous section. Figure 33 The second body support 81B is provided with a second damping component 9B, which is configured to apply a compressive force to the second slider 84B along the length direction of the second body support 81B.

[0210] When a user operates the electronic device to rotate the first compensation device 1031, the user receives force feedback, enhancing the user experience. Furthermore, in the first compensation device 1031, each damping component applies a compressive force to its corresponding slider, thus providing damping. In other words, each slider is a damping slider; that is, each damping slider is reused as a driving component in its corresponding compensation component, eliminating the need for additional driving components, resulting in a simple and compact structure.

[0211] In some embodiments, please refer to Figure 35 and Figure 36 and in conjunction with reference Figure 33 The front end face of the first main body support 81A is provided with a receiving groove 822A, and the first slider 84A is slidably connected to the receiving groove 822A. The bottom surface of the receiving groove 822A is provided with an installation chamber 819A, and the first damping component 9A is installed in the installation chamber 819A.

[0212] The front end face of the second body support 81B is provided with a receiving groove 822B, and the second slider 84B is slidably connected to the receiving groove 822B. The bottom surface of the receiving groove 822B is provided with a mounting chamber 819B, and the second damping component 9B is installed in the mounting chamber 819B of the second body support 81B.

[0213] In some embodiments, please refer to Figure 37 and Figure 38 The first damping component 9A may include a first elastic element 92A and two first rolling components 91A disposed at both ends of the first elastic element 92A. The surface of the first slider 84A facing the first damping component 9A is provided with a relief groove 844A. The two sides of the relief groove 844A disposed opposite to each other along the length direction of the rotating shaft base 1 have sliding surfaces 845A for the corresponding first rolling components 91A to roll. The sliding surfaces 845A are configured as concave and convex surfaces, including a first concave surface 846A, a convex surface 847A and a second concave surface 848A connected in sequence.

[0214] The second damping component 9B may include a second elastic element (not shown in the figure) and two second rolling components (not shown in the figure) disposed at both ends of the second elastic element. The surface of the second slider 84B facing the second damping component is provided with a relief groove. The two sides of the relief groove disposed opposite to each other along the length direction of the rotating shaft base 1 have sliding surfaces for the corresponding second rolling components to roll. The sliding surfaces are configured as concave and convex surfaces, which include a first concave surface, a convex surface and a second concave surface connected in sequence.

[0215] When the first compensation device 1031 is in the unfolded state, each first rolling component 91A abuts against the first concave surface 846A of the sliding surface 845A corresponding to the first slider 84A, and each second rolling component abuts against the first concave surface of the sliding surface corresponding to the second slider, consistent with the first damping component. When the first compensation device 1031 is in the folded state, each first rolling component 91A abuts against the second concave surface 848A of the sliding surface 845A corresponding to the first slider 84A, and each second rolling component abuts against the second concave surface of the sliding surface corresponding to the second slider.

[0216] This design ensures that each slider of the first compensation device 1031 is positioned within a concave surface of its corresponding sliding surface in both the unfolded and folded states, preventing relative rotation and enhancing the stability and reliability of the electronic device during use. Furthermore, the sliding connection between the two ends of each slider and the corresponding support bracket's receiving groove further enhances the relative sliding stability between the sliders and the support bracket, and makes the structure of each compensation component more compact.

[0217] When the first compensation device 1031 switches from the unfolded state to the folded state, the rolling element 912A of each first rolling component 91A rolls from the position abutting the first concave surface 846A of the sliding surface 845A, through the convex surface 847A, to the position abutting the second concave surface 848A, and the rolling element of each second rolling component rolls from the position abutting the first concave surface of the sliding surface, through the convex surface, to the position abutting the second concave surface.

[0218] When the first compensation device 1031 switches from the folded state to the unfolded state, the rolling element 912A of each first rolling assembly 91A rolls from the position abutting the second concave surface 848A of the sliding surface 845A, through the convex surface 847A, to the position abutting the first concave surface 846A, and the rolling element of each second rolling assembly rolls from the position abutting the second concave surface of the sliding surface, through the convex surface, to the position abutting the first concave surface.

[0219] In some embodiments, please refer to Figure 37 The first elastic element 92A in the first damping assembly 9A and the second damping assembly 9B (see...) Figure 33 The second elastic element in the ) is a wave-shaped elastic element, and is arranged in the corresponding body bracket mounting compartment.

[0220] As the overall design becomes thinner, the thickness of the first compensation device 1031 and the second compensation device 1032 gradually decreases. The thickness of the internal first damping component 9A and the second damping component 9B is also smaller, resulting in insufficient damping force. In particular, when the entire machine is in the unfolded state, the insufficient damping force makes it difficult for the entire machine to hover in the unfolded state.

[0221] Based on this, the first damping arm assembly 2 and the second damping arm assembly 4, located between the first compensation device 1031 and the second compensation device 1032, can provide intermediate supplementary damping force in the unfolded state, enabling the entire device to be stably suspended in the unfolded state and improving the impact resistance of the folding screen 50. Meanwhile, because the first damping arm assembly 2 and the second damping arm assembly 4 are small in size in the Y-axis and Z-axis directions, their position in the length direction of the pivot mechanism 103 is more flexible and will not affect the overall size of the device in the Y-axis direction.

[0222] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0223] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A rotating shaft mechanism, characterized in that, include: The rotating shaft base is equipped with a cam surface; First connector; A swing arm includes a rotating part, a connecting part, and a stop part that are fixedly connected. The rotating part is rotatably connected to the rotating shaft base, and the connecting part is connected to the first connecting member. The swing arm has a mounting hole extending from the connecting part to the rotating part. One end of the mounting hole facing the rotating part is open to form a first opening, which faces the cam surface. The stop part has a stop surface that extends circumferentially along the first opening and contacts the inner wall surface of the mounting hole. The vertical distance from the stop surface to the central axis of the mounting hole gradually decreases from the mounting hole to the cam surface. A damping structure is housed within the mounting hole and is elastically extendable and retractable along the extension direction of the mounting hole; when the swing arm rotates between the extended position and the folded position, the damping structure cooperates with the cam surface to provide damping force; the damping structure includes: A contact element is located at the first opening. The contact element has a spherical structure, and the stop surface is constricted and can prevent the contact element from falling off. An elastic element is located on the side of the contact element opposite to the cam surface, and the elastic element is elastically expandable and contractible along the extension direction of the mounting hole; The cam surface includes a concave region, and when the rocker arm is in the extended position, at least a portion of the contact element is fitted into the groove formed by the concave region.

2. The rotating shaft mechanism according to claim 1, characterized in that, The elastic element is a cylindrical helical spring; The axial direction of the cylindrical helical spring is consistent with the extension direction of the mounting hole.

3. The rotating shaft mechanism according to claim 1 or 2, characterized in that, The rotating shaft base includes: A rotating fitting part, which engages with the rotating part to achieve a rotatable connection; A cam portion is disposed on one side of the rotary mating portion and protrudes towards the front side of the rotating shaft base; when the rocker arm is in the extended position, the cam portion is located between the rotary mating portion and the mounting hole; wherein... The surface of the cam portion facing away from the rotary mating portion is the first side surface, and the surface of the cam portion facing the front side of the rotating shaft base is the front end surface. The cam portion also includes a transition surface connecting the first side surface and the front end surface. The first side surface, the transition surface, and the front end surface are connected to form the cam surface.

4. The rotating shaft mechanism according to claim 3, characterized in that, The rotation axis of the rotating fitting part that mates with the rotating part is the first axis; The distance from the transition surface to the first axis is greater than the distance from the first side surface to the first axis, and the distance from the transition surface to the first axis is also greater than the distance from the front end surface to the first axis.

5. The rotating shaft mechanism according to claim 3, characterized in that, The first side surface includes the concave region.

6. The rotating shaft mechanism according to claim 3, characterized in that, The mounting hole is provided in the connecting part, and the swing arm also includes a transition part that is fixedly connected between the connecting part and the rotating part; The transition section is provided with a clearance hole that passes through the front end face of the transition section and the back face of the transition section. When the swing arm rotates between the unfolded position and the folded position, the cam part extends into the clearance hole or is pulled out from the clearance hole. The first opening is located on the inner wall surface of the clearance hole.

7. The rotating shaft mechanism according to claim 6, characterized in that, The stop is provided on the inner wall surface of the clearance hole.

8. The rotating shaft mechanism according to claim 7, characterized in that, The rotation axis of the rotating fitting part that mates with the rotating part is the first axis; The stop portion is disposed on one side of the first opening away from the front end face of the transition portion and on opposite sides of the first opening arranged along the first axis, with one end of the stop portion facing the front end face of the transition portion open.

9. The rotating shaft mechanism according to any one of claims 6-8, characterized in that, The rotating fitting part is an arc-shaped sliding groove disposed in the rotating shaft base; the rotating part is accommodated in the arc-shaped sliding groove and can slide along the arc-shaped sliding groove; The pivot base is also provided with a first clearance notch, which is connected to the arc-shaped slide groove. When the swing arm is in the extended position, the transition part is accommodated in the first clearance notch, and the cam part is disposed in the first clearance notch.

10. The rotating shaft mechanism according to claim 9, characterized in that, The surface of the cam portion facing the arc-shaped groove is a concave arc surface, which forms part of the inner wall surface of the arc-shaped groove.

11. The rotating shaft mechanism according to claim 1 or 2, characterized in that, The end of the mounting hole away from the rotating part is open to form a second opening; The damping structure also includes: A sealing element is disposed at the second opening, and the elastic element is located between the sealing element and the contact element.

12. The rotating shaft mechanism according to claim 11, characterized in that, At least a portion of the inner wall surface of the mounting hole is provided with internal threads; The sealing component is a screw, which includes a head and a shank. The head is located on the side of the connecting portion away from the rotating portion, and at least a portion of the shank is located in the mounting hole and screwed into the internal thread.

13. The rotating shaft mechanism according to claim 12, characterized in that, Also includes: The mounting component includes a fixing part and a mounting part fixed to the fixing part. The fixing part is clamped between the head and the connecting part, and the fixing part is provided with a fixing hole. The rod part passes through the fixing hole. The mounting part is located on the front side of the swing arm and is used to install decorative parts.

14. The rotating shaft mechanism according to claim 1 or 2, characterized in that, The connecting part includes a main body and a sliding part disposed on the main body, and the mounting hole is disposed on the main body; The first connector is provided with a slide rail, and the sliding part is slidably connected to the slide rail; when the swing arm rotates between the unfolded position and the folded position, the sliding part can slide along the slide rail.

15. The rotating shaft mechanism according to claim 14, characterized in that, The sliding portion includes a first sliding portion and a second sliding portion located on opposite sides of the main body portion; The first connector is provided with a mounting groove recessed from the front end of the first connector to the back of the first connector, and the slide rail includes a first slide groove and a second slide groove disposed on two opposite side walls of the mounting groove. The main body is slidably accommodated in the mounting groove, the first sliding part is slidably accommodated in the first sliding groove, and the second sliding part is slidably accommodated in the second sliding groove.

16. The rotating shaft mechanism according to claim 15, characterized in that, The back of the main body is provided with a protruding ridge, the extension direction of the protruding ridge is consistent with the extension direction of the mounting hole, and the orthographic projection of the mounting hole on the front end face of the main body overlaps with the orthographic projection of the protruding ridge on the front end face of the main body. The bottom surface of the mounting groove is provided with a clearance groove, the extension direction of the clearance groove is consistent with the extension direction of the protruding part, and the protruding part can be slidably accommodated in the clearance groove.

17. The rotating shaft mechanism according to claim 1 or 2, characterized in that, It also includes a first compensation device and a second compensation device, which are arranged along the length direction of the rotating shaft base. The swing arm is located between the first compensation device and the second compensation device.

18. A foldable device, characterized in that, include: First structural component; Second structural component; The rotating shaft mechanism according to any one of claims 1-17, wherein the first structural member is connected to the first connecting member, and the second structural member is connected to the rotating shaft base.

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