Rotating shaft mechanism and foldable screen device

Abstract

A rotating shaft mechanism and a foldable screen device. The rotating shaft mechanism (203) comprises a rotating shaft base (1) and a first swing arm assembly (2A); the first swing arm assembly (2A) comprises a first swing arm (21A), a first connecting member (22A), a first support member (23A) and a second support member (24A); the first swing arm (21A) is connected to the rotating shaft base (1); the first connecting member (22A) is connected to the first swing arm (21A); the first support member (23A) is connected to the first connecting member (22A); the first support member (23A) comprises a first support face (m1A); the first support face (m1A) is used for supporting part of a foldable screen (10); the second support member (24A) is connected between the rotating shaft base (1) and the first support member (23A); the second support member (24A) comprises a second support face (m2A); the second support face (m2A) is used for supporting another part of the foldable screen (10). The rotating shaft mechanism can improve the continuity of surfaces of support devices for supporting foldable screens while allowing for thinning of entire foldable screen devices.

Description

Hinge mechanism and folding screen device Technical Field

[0001] The present application relates to the technical field of folding screen devices, and in particular to a hinge mechanism and a folding screen device. Background Art

[0002] At present, foldable screen devices such as mobile phones are receiving more and more attention because they can take into account both large-screen display and portability.

[0003] A foldable screen device typically includes a support device and a foldable screen supported by the support device. The support device includes a hinge mechanism and a housing connected to both sides of the hinge mechanism. To improve portability and user experience, the thickness of foldable screen devices is required to be increasingly thinner. At the same time, to improve the impact resistance of the foldable screen in the unfolded state, the continuity of the surface of the support device (especially the hinge mechanism) used to support the foldable screen is required to be increasingly higher. However, existing technologies often cannot meet both requirements simultaneously.

[0004] Summary of the Invention

[0005] The present application provides a hinge mechanism and a folding screen device, which can improve the continuity of the surface of the supporting device used to support the folding screen while reducing the thickness of the entire folding screen device, thereby increasing the impact resistance of the folding screen.

[0006] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0007] In the first aspect, a pivot mechanism is provided, which includes a pivot base and a first swing arm assembly, and the first swing arm assembly includes a first swing arm, a first connecting member, a first support member, and a second support member. The first swing arm is connected to the pivot base. The first connecting member is connected to the first swing arm. The first support member is connected to the first connecting member, and the first support member includes a first support surface, and the first support surface is used to support a part of the folding screen. The second support member is connected between the pivot base and the first support member, and the front end surface of the second support member includes a second support surface, and the second support surface is used to support another part of the folding screen. Here, "connection" can be a fixed connection, or a movable connection such as a slidable connection, a rotatable connection, or a slidable and rotatable connection.

[0008] In the hinge mechanism provided by the present application, the first swing arm can swing relative to the hinge base so that the first connecting member can rotate between the unfolded position and the folded position relative to the hinge base. When the first connecting member rotates between the unfolded position and the folded position relative to the hinge base, it can drive the first support member and the second support member to switch between the unfolded position and the folded position. In this process, in addition to supporting a part of the folding screen with the help of the first support member, the hinge mechanism also supports another part of the folding screen with the help of the second support member. Thus, the two-level support members are used to jointly support the bendable area, which can reduce the thickness and width of the first support member, so as to facilitate the thinning of the entire machine, while ensuring the structural strength of the first support member and the support strength of the bendable area. Moreover, the second support member fills the gap between the first support member and the hinge base, which can improve the continuity of the surface used to support the bendable area on the hinge mechanism, thereby improving the impact resistance of the bendable area in the folding screen.

[0009] Optionally, the pivot base further includes a second swing arm assembly, and the second swing arm assembly and the first swing arm assembly are respectively located on both sides of the pivot base. The second swing arm assembly includes a third swing arm, a second connecting member, a third support member, and a fourth support member. The third swing arm is connected to the pivot base. The second connecting member is connected to the third swing arm. The third support member is connected to the second connecting member, and the front end surface of the third support member includes a second main support surface, and the second main support surface is used to support a portion of the folding screen. The fourth support member is connected between the pivot base and the third support member, and the front end surface of the fourth support member includes a fourth support surface, and the fourth support surface is used to support another portion of the folding screen.

[0010] Optionally, the second support member is rotatably connected to the pivot base, and the second support member is slidably and rotatably connected to the first support member. When the first swing arm rotates between the deployed position and the folded position, the rotation angle of the second support member can be set to be different from the rotation angle of the first support member to enhance design flexibility.

[0011] Optionally, the hinge mechanism further includes a first slide rail and a first sliding member. The first slide rail is disposed on the first support member, with the first and second ends of the first slide rail being respectively located in the longitudinal direction, and the distance from the second end to the hinge base being smaller than the distance from the first end to the hinge base. The first sliding member is disposed on the second support member, and the first sliding member is slidably and rotatably connected to the first slide rail. When the hinge mechanism is in the deployed state, the first sliding member is located at the first end; when the hinge mechanism is in the folded state, the first sliding member is located at the second end. When the hinge mechanism switches from the deployed state to the folded state, the distance between the second support member and the first support member is increased, increasing the support length of the hinge mechanism, effectively avoiding the third display area and preventing the folding screen from generating creases in the third display area. When the hinge mechanism switches from the folded state to the deployed state, the distance between the second support member and the first support member is reduced, so that the support length of the hinge mechanism is compatible with the length of the third display area, thereby preventing damage to the third display area.

[0012] Optionally, the first slide rail is a slot-type slide rail, the first sliding member is slidably accommodated in the first slide rail, and the first sliding member can rotate in the first slide rail while sliding along the first slide rail. This structure is simple, has high assembly efficiency, and is low in cost.

[0013] Optionally, the first slide rail is arranged on the side of the first support member facing away from the first support surface, and the vertical distance from the second end to the first support surface is greater than the vertical distance from the first end to the first support surface. When the hinge mechanism switches from the unfolded state to the folded state, the end of the second support member facing the first support member sinks a certain distance toward the back side of the first support surface, which can increase the avoidance space for the third display area and prevent the folding screen from having creases in the third display area. When the hinge mechanism switches from the unfolded state to the folded state, the end of the second support member facing the first support member rises a certain distance toward the front side of the first support surface, which can effectively support the folding screen and improve the impact resistance of the folding screen.

[0014] Optionally, the first slide rail extends along a straight track from the first end to the second end and is inclined in a direction away from the first support surface.

[0015] Optionally, the first swing arm is rotatably connected to the pivot base, and the first connecting member is rotatably connected to the first swing arm. The pivot mechanism further includes a second swing arm. The second swing arm is rotatably connected to the pivot base, and the first connecting member is slidably connected to the second swing arm. When the pivot mechanism switches from an unfolded state to a folded state, the first connecting member slides relative to the second swing arm in a direction away from the pivot base. The second swing arm thereby constrains the motion trajectory of the first connecting member, ensuring that the assembly consisting of the pivot base, the first swing arm, the first connecting member, and the second swing arm has one degree of freedom, resulting in unique motion.

[0016] Optionally, the front end surface of the first connecting member is provided with a first chute recessed toward the back of the first connecting member, and two second chute recessed away from each other are provided on opposite sides of the first chute. The second swing arm includes a first sliding portion and two second sliding portions located on opposite sides of the first sliding portion. The first sliding portion is slidably received in the first chute, and the two second sliding portions are slidably received in the two second chute recesses, respectively. This achieves a slidable connection between the second swing arm and the first connecting member, and the two second chute recesses cooperate with the two second sliding portions to prevent the second swing arm from detaching from the first connecting member from the front side of the first connecting member.

[0017] Optionally, the first support member is rotatably connected to the first connecting member. The pivot mechanism also includes a second slide rail and a second sliding member. The second slide rail is arranged on the second support member, and the two ends of the second slide rail in the longitudinal direction are respectively the third end and the fourth end, and the distance from the fourth end to the pivot base is smaller than the distance from the third end to the pivot base. The second sliding member is arranged on the second swing arm, and the second slide member is slidable and rotatably connected to the second slide rail. When the pivot mechanism is in the expanded state, the second slide member is located at the third end. When the pivot mechanism is in the folded state, the second slide member is located at the fourth end. In this way, with the help of the second slide rail and the second sliding member, the rotation direction and rotation speed of the first support member relative to the first connecting member can be constrained, so that the degree of freedom of the assembly composed of the first support member, the first connecting member, the first swing arm and the second swing arm is 1, the movement mode of the assembly is unique, and the movement stability of the first support member can be ensured.

[0018] Optionally, the second slide rail is a slot-type slide rail, the second sliding member can be slidably accommodated in the second slide rail, and the second sliding member can rotate in the second slide rail while sliding along the second slide rail. This structure is simple, has high assembly efficiency, and is low in cost.

[0019] Optionally, the second slide rail is located on the side of the first support member facing away from the first support surface, and the second slide rail is also located between the rotation axis of the first support member relative to the first connecting member and the hinge base. The vertical distance from the fourth end to the first support surface is less than the vertical distance from the third end to the first support surface. The end of the first support member facing the hinge base is the first end, and the end of the first support member away from the hinge base is the second end. When the hinge mechanism switches from the unfolded state to the folded state, the second sliding member cooperates with the second slide rail to force the first end to tilt relative to the second end toward the back side of the first support member to avoid the third display area. The third display area can be bent into a teardrop shape to avoid creases. When the hinge mechanism switches from the folded state to the unfolded state, the second sliding member cooperates with the second slide rail to force the first end to rise relative to the second end toward the front side of the first support member to support the folding screen and ensure the impact resistance of the folding screen.

[0020] Optionally, from the third end to the fourth end, the second slide rail gradually extends toward the first support surface. The first support member has better movement stability during the state switching of the hinge mechanism, which can prevent the folding screen from being impacted.

[0021] Optionally, the second slide rail extends along an arc track, and the arc track protrudes in a direction away from the first support surface.

[0022] Optionally, the first support member is located on the front side of the second swing arm, and a mounting protrusion is provided on the surface of the first support member facing away from the first support surface, and the second slide rail is provided on the mounting protrusion. The front end surface of the first sliding portion is provided with a first avoidance notch recessed toward the back of the first sliding portion, the second sliding member is provided in the first avoidance notch, and the second sliding member is fixed to the first sliding portion. At least a portion of the mounting protrusion is accommodated in the first avoidance notch, and when the first sliding portion and the two second sliding portions slide along the first slide groove and the two second slide grooves respectively, the first avoidance notch allows the mounting protrusion to move in the first avoidance notch. By accommodating at least a portion of the mounting protrusion with the help of the first avoidance notch, thickness overlap can be avoided, which is beneficial to reducing the thickness of the first swing arm assembly and even the entire machine, thereby improving the compactness of the structure.

[0023] Optionally, there are two second rails, one disposed on each end surface of the mounting protrusion aligned along the length of the rotating shaft base. There are also two second sliding members, one disposed on each inner side surface of the first clearance notch aligned along the length of the rotating shaft base. The two second sliding members are slidably and rotatably connected to the two second rails. The two second sliding members, in conjunction with the two second rails, enhance the stability of the sliding connection, preventing one side of the mounting protrusion from lifting out of the first clearance notch and preventing jamming.

[0024] Optionally, the first relief notch extends through the back of the first sliding portion. A second relief notch is provided on the first connecting member, opposite the first relief notch. The mounting projection is partially accommodated within the second relief notch. When the first sliding portion and the two second sliding portions slide along the first and two second chute grooves, respectively, the second relief notch allows the mounting projection to move within it. By accommodating the mounting projection within the second relief notch, thickness overlap can be avoided, thereby reducing the thickness of the first swing arm assembly and, ultimately, the entire device, and enhancing structural compactness.

[0025] Optionally, the second support member is provided with a first stop portion, and the first connecting member is provided with a second stop portion. When the hinge mechanism is in a folded state, the second stop portion is located on a side of the first stop portion away from the hinge base, and along the sliding direction of the first connecting member relative to the second swing arm, at least a portion of the end surface of the first stop portion facing the second stop portion faces at least a portion of the end surface of the second stop portion facing the first stop portion. In this way, the first stop portion can cooperate with the second stop portion to stop, so as to release the impact force from the first shell to the second support member, thereby avoiding a large relative sliding between the first connecting member and the second swing arm at the moment of falling, thereby reducing the deformation of the third display area and reducing the probability of damage to the third display area.

[0026] Optionally, the second support member is provided with a third stop portion, and the second swing arm is provided with a fourth stop portion. When the hinge mechanism is in a folded state, the fourth stop portion is located between the third stop portion and the hinge base, and along the sliding direction of the first connecting member relative to the second swing arm, at least a portion of the end surface of the third stop portion facing the fourth stop portion faces at least a portion of the end surface of the fourth stop portion facing the third stop portion. In this way, the third stop portion can cooperate with the fourth stop portion to further discharge the impact force from the first shell to the second swing arm. As a result, the discharge path of the impact force is changed from the original first connecting member → second swing arm to the first connecting member → second support member → second swing arm in this embodiment. The changed discharge path has better stability, avoids large relative sliding between the first connecting member and the second swing arm at the moment of falling, and reduces the probability of damage to the third display area.

[0027] Optionally, when the hinge mechanism is in the folded state, along the sliding direction of the first connecting member relative to the second swing arm, the distance from the end face of the first stop portion facing the second stop portion to the end face of the second stop portion facing the first stop portion is a first spacing, and the distance from the end face of the third stop portion facing the fourth stop portion to the end face of the fourth stop portion facing the third stop portion is a second spacing. Both the first spacing and the second spacing are greater than 0 mm. The sum of the first spacing and the second spacing is greater than or equal to 0.7 mm and less than or equal to 1.2 mm. Since both the first spacing and the second spacing are greater than 0 mm, a certain amount of movable clearance is left between the first stop portion and the second stop portion and between the third stop portion and the fourth stop portion. At the same time, since the sum of the first spacing and the second spacing is greater than or equal to 0.7 mm, the first spacing and the second spacing are relatively large, which can effectively prevent the entire machine from getting stuck when switching between the unfolded state and the folded state. In addition, since the sum of the first spacing and the second spacing is less than or equal to 1.2 mm, under the action of impact force, even if the first stop portion and the second stop portion and the third stop portion and the fourth stop portion come into contact with each other, the hinge mechanism will not squeeze the third display area too much, thereby protecting the third display area and preventing it from being damaged.

[0028] Optionally, the first stop portion has a first transition surface, the second stop portion has a second transition surface, the third stop portion has a third transition surface, and the fourth stop portion has a fourth transition surface. When the hinge mechanism switches between the folded state and the unfolded state, the first transition surface cooperates with the second transition surface to form a clearance, and the third transition surface cooperates with the fourth transition surface to form a clearance, thereby ensuring a compact structure and preventing jamming.

[0029] In the second aspect, a folding screen device is also provided, which includes a folding screen, a first shell and a hinge mechanism as described in any of the above technical solutions, the first connecting member of the hinge mechanism is connected to the first shell, and at least part of the folding screen is supported on the first shell, the first support surface of the first support member and the second support surface of the second support member.

[0030] Since the folding screen device provided in this application includes the hinge mechanism as described in any of the above technical solutions, the two can solve the same problem and achieve the same effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a perspective view of a foldable screen device in an unfolded state provided by some embodiments of the present application;

[0032] FIG2 is a schematic diagram of a partial exploded structure of the folding screen device shown in FIG1 ;

[0033] FIG3 is a schematic structural diagram of the folding screen device shown in FIG1 when it is in a folded state;

[0034] FIG4 a is a perspective view of a rotating shaft mechanism in an expanded state provided by some embodiments of the present application;

[0035] FIG4b is a top view of the rotating shaft mechanism shown in FIG4a in an expanded state;

[0036] FIG4c is a front view of the rotating shaft mechanism shown in FIG4b when viewed along the direction D1;

[0037] FIG4 d is a perspective view of the assembly structure of the rotating shaft mechanism and the folding screen shown in FIG4 a in a folded state;

[0038] FIG4e is a front view of the rotating shaft mechanism shown in FIG4d when viewed along the direction D2;

[0039] FIG5a is a perspective view of a rotating shaft mechanism in an expanded state provided by some other embodiments of the present application;

[0040] FIG5b is a top view of the rotating shaft mechanism shown in FIG5a;

[0041] FIG5c is a schematic structural diagram of the rotating shaft mechanism shown in FIG5b when viewed along the direction D3;

[0042] FIG5 d is a perspective view of the exploded structure of the rotating shaft mechanism shown in FIG5 a from a top view;

[0043] FIG5e is a perspective view of the exploded structure of the rotating shaft mechanism shown in FIG5a when viewed from a bottom perspective;

[0044] FIG5 f is a front view of the assembly structure of the rotating shaft mechanism and the folding screen shown in FIG5 a ;

[0045] FIG5g is a perspective view of the rotating shaft mechanism shown in FIG5a in a folded state;

[0046] FIG5h is a front view of the rotating shaft mechanism shown in FIG5g when viewed along the direction D4;

[0047] FIG5i is a schematic structural diagram of the rotating shaft mechanism shown in FIG5g when viewed along the direction D5;

[0048] FIG6a is a perspective view of the assembly structure of the lower base, the first support member, and the second support member of the first swing arm assembly in the rotating shaft mechanism shown in FIG5a to FIG5i in an unfolded state;

[0049] FIG6b is a perspective view of the assembly structure shown in FIG6a in a folded state;

[0050] FIG6c is a perspective view of the assembly structure shown in FIG6b from another perspective;

[0051] FIG7 is a partial enlarged view of region I in the rotating shaft mechanism shown in FIG5i;

[0052] FIG8 is a partial enlarged view of the rotating shaft base, the first supporting member, and the second supporting member provided in some other embodiments of the present application;

[0053] FIG9 is a perspective view of the assembly structure of the rotating shaft base, the first support member, and the second support member in the first swing arm assembly provided in some other embodiments of the present application;

[0054] FIG10 is a perspective view of the assembly structure of the rotating shaft base, the first support member, and the second support member in the first swing arm assembly provided in some other embodiments of the present application;

[0055] FIG11a is a perspective view of the assembly structure of the lower base in the rotating shaft mechanism shown in FIG5a to FIG5i and the first swing arm and the first connecting member in the first swing arm assembly in a folded state;

[0056] FIG11b is a perspective view of the assembly structure shown in FIG11a from another perspective;

[0057] FIG11c is a schematic diagram of the cross-sectional structure of the rotating shaft mechanism shown in FIG5b along the AA direction;

[0058] FIG11d is a schematic diagram of the cross-sectional structure of the rotating shaft mechanism shown in FIG5b along the BB direction;

[0059] FIG11e is a simplified structural diagram of the assembly structure shown in FIG11a;

[0060] FIG12a is a perspective view of the assembly structure of the rotating shaft base and the first swing arm assembly in the rotating shaft mechanism shown in FIG5a-FIG5i;

[0061] FIG12b is a perspective view of the assembly structure shown in FIG12a from another perspective;

[0062] FIG12c is a perspective view of the assembly structure of the first connecting member, the second swing arm and the first supporting member in the first swing arm assembly in the assembly structure shown in FIG12a;

[0063] FIG12d is a schematic diagram of the cross-sectional structure of the assembly structure shown in FIG12c along the CC direction;

[0064] FIG12e is a simplified structural diagram of the assembly structure shown in FIG12a;

[0065] FIG13 is a simplified structural diagram of a first swing arm assembly provided in an embodiment of the present application;

[0066] FIG14a is a diagram showing a scene in which the foldable screen device including the hinge mechanism shown in FIG5a to FIG5i falls to the ground;

[0067] FIG14b is a force analysis diagram of the internal rotating shaft mechanism of the foldable screen device shown in FIG14a when it falls to the ground;

[0068] FIG15a is a perspective view of a rotating shaft mechanism in a folded state provided by yet other embodiments of the present application;

[0069] FIG15b is a perspective view of the rotating shaft mechanism shown in FIG15a in a folded state from another perspective;

[0070] FIG15c is a perspective view of the assembly structure of the rotating shaft base and the first swing arm assembly in the rotating shaft mechanism shown in FIG15a in a folded state;

[0071] FIG15d is a perspective view of the assembly structure shown in FIG15c from another perspective;

[0072] FIG15e is a front view of the assembly structure shown in FIG15d when viewed from direction D6;

[0073] FIG15f is a schematic diagram of a cross-sectional structure of the rotating shaft mechanism shown in FIG15a;

[0074] FIG16a is a perspective view of the rotating shaft mechanism shown in FIG15a and FIG15b in an expanded state;

[0075] FIG16b is a bottom view of the rotating shaft mechanism shown in FIG16a;

[0076] FIG16c is a schematic diagram of the cross-sectional structure of the rotating shaft mechanism shown in FIG16b along the DD direction;

[0077] FIG16d is a schematic structural diagram of the assembly structure of the rotating shaft base and the first swing arm assembly in the rotating shaft mechanism shown in FIG16a when in a semi-folded state;

[0078] FIG16e is a schematic diagram of the cross-sectional structure of the assembly structure shown in FIG16d along the EE direction.

[0079] Reference Signs: 100, foldable screen device; 10, foldable screen; 101, first display area; 102, second display area; 103, third display area; 1031, first transition section; 1032, second transition section; 1033, arc section; 20, supporting device; 201, first housing; 202, second housing; 203, rotating shaft mechanism; 1, rotating shaft base; 11, upper base; 12, lower base; 1a, bracket; 1b, first shaft hole; s2, convex arc surface; s1, concave arc surface; 1c, first arc-shaped slide groove; 1d, third shaft hole; 1e, third rotating shaft; 2A, first swing arm assembly; 21A, first swing arm; 211, first arc-shaped slide; 212, second shaft hole; 22A, first connecting member; 221A, second stopper; 221, second rotating shaft; 222, first slide groove; 223, second slide groove; 224, third protrusion; 225, second arc-shaped slide groove; 23A, first supporting member; m1A, first supporting surface; 231, first slide rail; a, rotating shaft; 232, first protrusion; 2321, first portion; 2322, second portion; 2323, notch; 234, second protrusion; 235, second arc-shaped slide; 236, second slide rail; 237, mounting protrusion; 24A, second supporting member; 241A, first stopper; 242A, third stopper; m2A, second supporting surface; 241, first connecting arm; 242, first rotating shaft; 243, first sliding member; 244, second connecting arm; 25A, second swing arm; 251, fourth axis hole; 252, first sliding portion; 253, second sliding portion; 254, second sliding member; 251A, fourth stopper; 26, first avoidance gap; 27, second avoidance gap; 2B, second swing arm assembly; 21B, third swing arm; 22B, second connecting member; 23B, third support member; m1B, third support surface; 24B, fourth support member; m2B, fourth support surface; 25B, fourth swing arm; 1f, fourth rotation axis; O1, first axis; O2, second axis; O3, third axis; O4, fourth axis; d1, first end; d2, second end; d3, third end; d4, fourth end; n1, first end portion; n2, second end portion; K1, first end surface; K2, second end surface; K3, third end surface; K4, fourth end surface; C1, first transition surface; C2, second transition surface; C3, third transition surface; C4, fourth transition surface. DETAILED DESCRIPTION

[0080] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of the features.

[0081] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0082] In the embodiments of the present application, "connection" can be understood as a fixed connection or a movable connection. Fixed connection includes but is not limited to welding, riveting, threaded connection, clamping, bonding or integral molding, and movable connection includes but is not limited to rotatable connection and slidable connection.

[0083] In the embodiments of the present application, unless otherwise specified, the description "perpendicular" means approximately perpendicular within a certain error range, and the description "parallel" means approximately parallel within a certain error range.

[0084] The present application provides a foldable screen device, which includes but is not limited to user equipment (UE) or terminal equipment, for example, a portable Android device (PAD), a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device, a vehicle-mounted device, or other mobile or fixed terminal. The present application uses the foldable screen device as an example of a handheld device with wireless communication capabilities, such as a mobile phone.

[0085] Please refer to Figures 1 and 2. Figure 1 is a three-dimensional diagram of the folding screen device 100 provided in some embodiments of the present application in the unfolded state, and Figure 2 is a schematic diagram of the partial decomposition structure of the folding screen device 100 shown in Figure 1. The folding screen device 100 is approximately in the shape of a rectangular flat plate in the unfolded state. In order to facilitate the description of the various embodiments below, an XYZ coordinate system is established for the folding screen device 100 in the unfolded state, and the length direction of the folding screen device 100 is defined as the X-axis direction, the width direction of the folding screen device 100 is defined as the Y-axis direction, and the thickness direction of the folding screen device 100 is defined as the Z-axis direction. It can be understood that the coordinate system setting of the folding screen device 100 can be flexibly set according to actual needs, and no specific limitation is made here. In some other embodiments, the shape of the folding screen device 100 can also be a square flat plate, a circular flat plate, an elliptical flat plate, etc.

[0086] The folding screen device 100 includes a folding screen 10 and a supporting device 20 .

[0087] The foldable screen 10 is used to display images, videos, and other information. The foldable screen 10 can be an organic light-emitting diode (OLED) screen, a micro organic light-emitting diode (OLED) screen, a quantum dot light-emitting diode (QLED) screen, a liquid crystal display (LCD), and the like.

[0088] The foldable screen 10 has a display area for displaying image information. The display area of ​​the foldable screen 10 is exposed to facilitate presenting images, videos, and other information to the user. The foldable screen 10 includes a first display area 101, a second display area 102, and a third display area 103. The third display area 103 is connected between the first display area 101 and the second display area 102. In the foldable screen device 100 shown in Figure 1, the foldable screen 100 is in the unfolded state. The first display area 101, the third display area 103, and the second display area 102 are arranged in sequence along the X-axis, so that the foldable screen device 100 folds in the horizontal direction. In other embodiments, when the foldable screen 10 is in the unfolded state, the first display area 101, the third display area 103, and the second display area 102 can also be arranged in sequence along the Y-axis. In this way, the foldable screen device 100 folds in the vertical direction. When the foldable screen 10 is in the unfolded state, it can achieve a large screen display, providing users with richer information and a better user experience.

[0089] At least the third display area 103 of the foldable screen 10 is a flexible screen structure. This allows the third display area 103 to bend and deform under external force, allowing the foldable screen 10 to fold from the unfolded state shown in Figure 1 to the folded state. The first display area 101 and second display area 102 of the foldable screen 10 can be flexible, rigid, or partially flexible, without specific limitation.

[0090] Please refer to Figure 3, which is a structural diagram of the folding screen device 100 shown in Figure 1 when it is in a folded state. The folding screen 10 in the folding screen device 100 is also in a folded state. Specifically, when the folding screen 10 is in a folded state, the first display area 101 and the second display area 102 of the folding screen 10 are approximately parallel and opposite. It should be noted that the angle θ between the first display area 101 and the second display area 102 is within 30°, and the first display area 101 and the second display area 102 can be considered to be approximately parallel. The first display area 101 and the second display area 102 are opposite to each other means that the display surface of the first display area 101 and the display surface of the second display area 102 face each other.

[0091] When the foldable screen 10 is in the folded state, referring to FIG. 3 , the third display area 103 is folded into a teardrop shape. In this shape, the third display area 103 includes an arc segment 1033, a first transition segment 1031, and a second transition segment 1032. The first transition segment 1031 connects between the arc segment 1033 and the first display area 101. The second transition segment 1032 connects between the arc segment 1033 and the second display area 102. The distance between the end of the first transition segment 1031 connecting to the first display area 101 and the end of the second transition segment 1032 connecting to the second display area 102 is a first distance. The distance between the end of the first transition segment 1031 connecting to the arc segment 1033 and the end of the second transition segment 1032 connecting to the arc segment 1033 is a second distance, which is greater than the first distance. It is understood that when the foldable screen device is in the folded state, the third display area 103 of the foldable screen 10 can also be folded into other shapes according to actual needs, and this application does not limit this.

[0092] When the folding screen device 100 is in a folded state, please continue to refer to Figure 3. The supporting device 20 is protected outside the folding screen 10, and the folding screen 10 is invisible to the user, which can prevent the folding screen 10 from being scratched by hard objects. The folding screen device is an inward-folding folding screen device, and the size of the folding screen device 100 is reduced, which is convenient to carry.

[0093] The support device 20 is used to support the foldable screen 10. The support device 20 includes a first housing 201, a second housing 202, and a hinge mechanism 203. The first housing 201 supports the first display area 101, and the second housing 202 supports the second display area 102. The hinge mechanism 203 is connected between the first housing 201 and the second housing 202 and supports the third display area 103. The hinge mechanism 203 is used to achieve rotation between the second housing 202 and the first housing 201, thereby supporting the foldable screen 10 between the unfolded state and the folded state.

[0094] On the basis of the above, the side of the support device 20 facing the folding screen 10 is defined as the front side, and the side facing away from the folding screen 10 is defined as the back side. Furthermore, to facilitate the description of the various embodiments below, unless otherwise specified, the "front side" used to describe each component in the support device 20 refers to the side of the component facing the folding screen 10, the "front end surface" refers to the surface of the component facing the folding screen 10, the "back side" refers to the side of the component facing away from the folding screen 10, and the "back surface" refers to the surface of the component facing away from the folding screen 10.

[0095] Please refer to Figures 4a-4e. Figure 4a is a perspective view of the rotating shaft mechanism 203 provided in some embodiments of the present application in the unfolded state. Figure 4b is a top view of the rotating shaft mechanism 203 shown in Figure 4a in the unfolded state. Figure 4c is a front view of the rotating shaft mechanism 203 shown in Figure 4b when viewed along direction D1. Figure 4d is a perspective view of the assembly structure of the rotating shaft mechanism 203 shown in Figure 4a and the folding screen 10 in the folded state. Figure 4e is a front view of the rotating shaft mechanism 203 shown in Figure 4d when viewed along direction D2. The rotating shaft mechanism 203 includes a rotating shaft base 1, a first swing arm assembly 2A, and a second swing arm assembly 2B.

[0096] The hinge base 1, also known as the connecting beam or center beam, provides a positional reference within the hinge mechanism 203. The length of the hinge base 1 is parallel to the Y-axis. In some embodiments, the hinge base 1 can be used to support a portion of the folding screen 10. Optionally, the front surface of the hinge base 1 includes a bearing surface m0, which is used to support a portion of the arc segment 1033.

[0097] The first swing arm assembly 2A and the second swing arm assembly 2B are respectively located on both sides of the shaft base 1. The first swing arm assembly 2A is connected between the shaft base 1 and the first housing 201, and the second swing arm assembly 2B is connected between the shaft base 1 and the second housing 202.

[0098] The first swing arm assembly 2A and the second swing arm assembly 2B are used to support the first shell 201 and the second shell 202 to change between the folded state and the unfolded state. At the same time, the first swing arm assembly 2A and the second swing arm assembly 2B are also used to support the first transition section 1031 and the second transition section 1032 of the folding screen 10 respectively.

[0099] 4a to 4e, the first swing arm assembly 2A includes a first swing arm 21A, a first connecting member 22A, and a first supporting member 23A. The second swing arm assembly 2B includes a third swing arm 21B, a second connecting member 22B, and a third supporting member 23B.

[0100] The first swing arm 21A and the third swing arm 21B are connected to the rotating shaft base 1. In some embodiments, the first swing arm 21A and the third swing arm 21B can be rotatably connected to the rotating shaft base 1. In other embodiments, the first swing arm 21A and the third swing arm 21B can also be slidably and rotatably connected to the rotating shaft base 1.

[0101] The first connecting member 22A and the second connecting member 22B are also referred to as wedge blocks or connecting blocks. The first connecting member 22A can be rotatably connected to the first swing arm 21A, and the second connecting member 22B can be rotatably connected to the third swing arm 21B. In other embodiments, the first connecting member 22A can be fixedly connected to the first swing arm 21A, or can be slidably connected to the first swing arm 21A, or can be both slidably and rotatably connected to the first swing arm 21A. The second connecting member 22B can also be fixedly connected to the third swing arm 21B, or can be slidably connected to the third swing arm 21B, or can be both slidably and rotatably connected to the third swing arm 21B.

[0102] It should be noted that, in the above embodiment and the subsequent embodiments, "slidable and rotatable connection" refers to a connection method that can slide relative to each other and rotate relative to each other during the relative sliding process. The connection structure corresponding to this connection method can be a high-pair matching structure of line-surface contact or point-surface contact, such as a matching structure of a roller-shaped, ball-shaped, drum-shaped or needle-shaped sliding part and a slide groove, or it can be a structure formed by connecting a slidable structure and a rotatable structure in series.

[0103] The first connecting member 22A can be fixedly connected to the first housing 201 using fasteners, and the second connecting member 22B can be fixedly connected to the second housing 202 using fasteners. Fasteners include, but are not limited to, threaded fasteners such as screws, bolts, and studs. In other embodiments, the first connecting member 22A can be fixedly connected to the first housing 201 using a snap-fit ​​connector or integrally formed. The second connecting member 22B can also be fixedly connected to the second housing 202 using a snap-fit ​​connector or integrally formed.

[0104] The first connecting member 22A can rotate with the first swing arm 21A relative to the rotation base 1, and the second connecting member 22B can rotate with the third swing arm 21B relative to the rotation base 1, to support the state switching of the rotation mechanism 203 between the deployed state and the folded state. When the rotation mechanism 203 is in the deployed state, the first swing arm 21A is in the deployed position, and when the first housing 201 is in the folded state, the first swing arm 21A is in the folded position.

[0105] The first support member 23A is used to support a portion of the foldable screen 10. Optionally, the front surface of the first support member 23A includes a first support surface m1A, which is used to support the first transition section 1031. The first support member 23A can be rotatably connected to the first connecting member 22A. In other embodiments, the first support member 23A can also be fixedly connected to the first connecting member 22A.

[0106] The third support member 23B is used to support a portion of the foldable screen 10. Optionally, the front surface of the third support member 23B includes a third support surface m1B, which is used to support the second transition section 1032. The third support member 23B can be rotatably connected to the second connecting member 22B. In other embodiments, the third support member 23B can also be fixedly connected to the second connecting member 22B.

[0107] When the hinge mechanism 203 is in the deployed state, referring to FIG4c , the angle between the first support surface m1A and the third support surface m1B can be 180°. Those skilled in the art will appreciate that the angle between the first support surface m1A and the third support surface m1B can also be 90°, 120°, 210°, etc. when the hinge mechanism 203 is in the deployed state, and this application does not impose any restrictions thereon. Furthermore, the angles illustrated in this application are all allowed to have slight deviations. For example, when the hinge mechanism 203 is in the deployed state, the angle between the first support surface m1A and the third support surface m1B can be 180°, or approximately 180°, such as 170°, 175°, 185°, or 190°, etc. The same understanding applies to other angles hereinafter.

[0108] When the hinge mechanism 203 is in a folded state, please refer to Figure 4e, the first supporting surface m1A and the third supporting surface m1B face each other, and the distance between the end of the first supporting surface m1A facing the hinge base 1 and the end of the third supporting surface m1B facing the hinge base 1 is large, and the distance between the end of the first supporting surface m1A away from the hinge base 1 and the end of the third supporting surface m1B away from the hinge base 1 is small, and the third display area 103 is folded into a teardrop shape.

[0109] In some embodiments, in order to reduce the crease of the third display area 103, please refer to Figure 4e. The first connecting member 22A, the first supporting member 23A, the second connecting member 22B and the third supporting member 23B can all be designed to be wedge-shaped with a larger thickness at the end away from the hinge base 1 and a smaller thickness at the end toward the hinge base 1, so as to increase the maximum width of the space inside the hinge mechanism 203 for accommodating the third display area 103 along the X-axis direction when the hinge mechanism 203 is in a folded state, thereby increasing the folding radius of the third display area 103 and reducing the crease of the third display area 103.

[0110] Furthermore, to enhance portability and user experience, the overall thickness of the foldable screen device 100 is required to be increasingly thinner. Within the entire device, the first connector 22A serves as a structural component that simultaneously connects the first swing arm 21A, the first support member 23A, and the first housing 201. The second connector 22B serves as a structural component that simultaneously connects the third swing arm 21B, the third support member 23B, and the second housing 202. The first connector 22A and the second connector 22B have a relatively large number of hole structures or slot structures for connecting these components. Therefore, to ensure structural strength, the thickness of the first connector 22A and the second connector 22B often needs to be designed to be larger, resulting in the thickness of the entire device at the location of the first connector 22A and the second connector 22B becoming the key factor affecting the overall thickness of the device.

[0111] Based on this, please refer to Figure 4e. By reducing the thickness of the first unit Q1 (the smallest end thickness is indicated as H1) formed by the first connecting member 22A and the first supporting member 23A, and the thickness of the second unit Q2 (the smallest end thickness is indicated as H2) formed by the second connecting member 22B and the third supporting member 23B, the thickness of the entire device can be reduced. This will result in a smaller thickness for the first supporting member 23A and the third supporting member 23B.

[0112] However, the first and third support members 23A, 23B are used to support the foldable screen 10. Their thicknesses, respectively, affect the structural strength and support stability of the first and third support members 23A, 23B. As shown in Figure 4c, given a certain width W1 of the first and third support members 23A, 23B, and a certain width W2, when the hinge mechanism 203 is in the deployed state, the smaller the thickness of the first and third support members 23A, 23B, the more likely they are to break along the X-axis under impact from the front. Consequently, in the deployed state, the structural strength of the first and third support members 23A, 23B decreases, and the support stability of the foldable screen 10 decreases. Therefore, by reducing the width W1 of the first and third support members 23A, 23B, and the width W2 of the third support members 23B, the risk of the first and third support members 23A, 23B breaking along the X-axis in the deployed state can be reduced, thereby ensuring structural and support strength.

[0113] In particular, when the first support member 23A and the third support member 23B are designed to be wedge-shaped with a larger thickness at the end away from the shaft base 1 and a smaller thickness at the end facing the shaft base 1, the smaller the thickness of the first support member 23A and the third support member 23B, the thinner the thickness of the first support member 23A and the third support member 23B facing the shaft base 1, and cannot meet the basic thickness requirements of the production process and structural strength. Therefore, the parts of the first support member 23A and the third support member 23B facing the shaft base 1 can be removed to narrow the width W1 and width W2 of the first support member 23A and the third support member 23B.

[0114] As a result, the gaps D1 and D2 between the first support member 23A and the third support member 23B and the hinge base 1 become larger when the hinge mechanism 203 is in the unfolded state (see Figure 4c), the continuity of the support surface on the hinge mechanism 203 for supporting the folding screen 10 is reduced, the support of the first support member 23A and the third support member 23B for the screen becomes worse, and the impact resistance of the third display area 103 is reduced.

[0115] In order to solve the above problems, please refer to Figures 5a to 5i. Figure 5a is a three-dimensional view of the hinge mechanism 203 provided in some embodiments of the present application in the unfolded state, Figure 5b is a top view of the hinge mechanism 203 shown in Figure 5a, Figure 5c is a structural schematic diagram of the hinge mechanism 203 shown in Figure 5b when viewed along the direction D3, Figure 5d is a three-dimensional view of the decomposed structure of the hinge mechanism 203 shown in Figure 5a from a top perspective, Figure 5e is a three-dimensional view of the decomposed structure of the hinge mechanism 203 shown in Figure 5a from an upward perspective, Figure 5f is a front view of the assembly structure of the hinge mechanism 203 shown in Figure 5a and the folding screen 10, Figure 5g is a three-dimensional view of the hinge mechanism 203 shown in Figure 5a in the folded state, Figure 5h is a front view of the hinge mechanism 203 shown in Figure 5g when viewed along the direction D4, and Figure 5i is a structural schematic diagram of the hinge mechanism 203 shown in Figure 5g when viewed along the direction D5.

[0116] The first swing arm assembly 2A includes the first swing arm 21A, the first connecting member 22A and the first support member 23A, and further includes a second support member 24A. The second swing arm assembly 2B includes the third swing arm 21B, the second connecting member 22B and the third support member 23B, and further includes a fourth support member 24B.

[0117] The second support member 24A is used to support another portion of the foldable screen 10. Optionally, the front end surface of the second support member 24A includes a second support surface m2A, which is used to support another portion of the arc segment 1033. The fourth support member 24B is used to support another portion of the foldable screen 10. Optionally, the front end surface of the fourth support member 24B includes a fourth support surface m2B, which is used to support another portion of the arc segment 1033.

[0118] The second support member 24A is connected between the rotating shaft base 1 and the first support member 23A, that is, the second support member 24A is connected to the rotating shaft base 1, and the second support member 24A is also connected to the first support member 23A. In some embodiments, the second support member 24A is rotatably connected to the rotating shaft base 1, and the second support member 24A is slidably and rotatably connected to the first support member 23A. In other embodiments, the second support member 24A is slidably and rotatably connected to the rotating shaft base 1, and the second support member 24A is rotatably connected to the first support member 23A. In still other embodiments, the second support member 24A is slidably and rotatably connected to the rotating shaft base 1, and the second support member 24A is slidably and rotatably connected to the first support member 23A. This application is exemplified by the second support member 24A being rotatably connected to the rotating shaft base 1 and the second support member 24A being slidably and rotatably connected to the first support member 23A.

[0119] The fourth support member 24B is connected between the rotating shaft base 1 and the third support member 23B. That is, the fourth support member 24B is connected to the rotating shaft base 1 and is also connected to the third support member 23B. In some embodiments, the fourth support member 24B is rotatably connected to the rotating shaft base 1, and the fourth support member 24B is slidably and rotatably connected to the third support member 23B. In other embodiments, the fourth support member 24B is slidably and rotatably connected to the rotating shaft base 1, and the fourth support member 24B is rotatably connected to the third support member 23B. In still other embodiments, the fourth support member 24B is slidably and rotatably connected to the rotating shaft base 1, and the fourth support member 24B is slidably and rotatably connected to the third support member 23B. This application uses the example of the fourth support member 24B being rotatably connected to the rotating shaft base 1 and the fourth support member 24B being slidably and rotatably connected to the third support member 23B.

[0120] In this way, the hinge mechanism 203 provided in the present application not only supports a part of the bendable area of ​​the folding screen 10 with the help of the first support member 23A and the third support member 23B, but also supports another part of the bendable area with the help of the second support member 24A and the fourth support member 24B. The two-level support members are used to jointly support the bendable area, which can reduce the thickness and width of the first support member 23A and the third support member 23B, so as to facilitate the thinning of the entire machine, while ensuring the structural strength of the first support member 23A and the third support member 23B and the support strength of the bendable area. Moreover, the second support member 24A fills the gap between the first support member 23A and the hinge base 1, and the fourth support member 24B fills the gap between the third support member 23B and the hinge base 1, which can improve the continuity of the surface used to support the bendable area on the hinge mechanism 203 and improve the impact resistance of the bendable area in the folding screen 10.

[0121] 5d and 5e, the shaft base 1 may include an upper base 11 and a lower base 12. The upper base 11 is located in front of the lower base 12, and the upper base 11 and the lower base 12 may be fixedly connected by at least one screw.

[0122] In other embodiments, the upper base 11 and the lower base 12 may also be fixedly connected by welding, clamping, etc., which is not specifically limited in this application.

[0123] In this way, the rotating shaft base 1 is formed by assembling at least the upper base 11 and the lower base 12 , which facilitates the assembly of other structural components (such as the first swing arm 21A and the third swing arm 21B) on the rotating shaft base 1 .

[0124] The following mainly introduces the internal structures and connection relationships of the first swing arm assembly 2A. The internal structures and connection relationships of the second swing arm assembly 2B can be the same as the internal structures and connection relationships of the first swing arm assembly 2A, and this application will not go into details.

[0125] In some other embodiments, the internal structures and connection relationships of the second swing arm assembly 2B may also be different from the internal structures and connection relationships of the first swing arm assembly 2A. In some other embodiments, the rotating shaft mechanism 203 may not be provided with a second swing arm assembly 2B, but directly connect the second shell 202 rotatably to the rotating shaft base 1. This application is exemplified by the fact that the internal structures and connection relationships of the second swing arm assembly 2B are the same as the internal structures and connection relationships of the first swing arm assembly 2A.

[0126] Please refer to Figures 6a-6c, and in combination with Figures 5d and 5e, Figure 6a is a three-dimensional view of the assembly structure of the lower base 12, the first support member 23A and the second support member 24A in the first swing arm component 2A in the rotating shaft mechanism 203 shown in Figures 5a-5i in the unfolded state, Figure 6b is a three-dimensional view of the assembly structure shown in Figure 6a in the folded state, and Figure 6c is a three-dimensional view of the assembly structure shown in Figure 6b from another perspective.

[0127] The second support member 24A is provided with at least one first connecting arm 241, each of which is provided with a first rotating shaft 242. When there are multiple first connecting arms 241, the first rotating shafts 242 on the multiple first connecting arms 241 are coaxially arranged. The rotating shaft base 1 is provided with at least one bracket 1a, each of which is provided with a first axial hole 1b. When there are multiple brackets 1a, the first axial holes 1b on the multiple brackets 1a are coaxially arranged. The first rotating shaft 242 on at least one first connecting arm 241 is respectively inserted into the first axial hole 1b on at least one bracket 1a to achieve a rotatable connection between the second support member 24A and the rotating shaft base 1. The first axial hole 1b limits the first rotating shaft 242 within a 360° range around the first rotating shaft 242, preventing the first rotating shaft 242 from radially dislodging from the first axial hole 1b, thereby providing a highly stable connection.

[0128] In some embodiments, please continue to refer to Figures 6a to 6c. There are two first connecting arms 241, and the two first connecting arms 241 are spaced apart along the Y-axis direction. There are two brackets 1a, and the two brackets 1a are spaced apart along the Y-axis direction. The two brackets 1a can be located between the two first connecting arms 241, or the two first connecting arms 241 are located between the two brackets 1a. The first rotating shafts 242 on the two first connecting arms 241 are respectively passed through the first shaft holes 1b on the two brackets 1a. In this way, the two first connecting arms 241 cooperate with the two brackets 1a to limit the position, which can prevent the second support member 24A from separating from the rotating shaft base 1 along the Y-axis direction. In other embodiments, the two brackets 1a can also be located on the same side of the two first connecting arms 241, which facilitates the assembly of the two first rotating shafts 242 in the two first shaft holes 1b.

[0129] In other embodiments, the second support member 24A and the rotating shaft base 1 may also be rotatably connected by adopting a rotatable connection structure composed of an arc-shaped sliding member and an arc-shaped sliding groove.

[0130] The rotation axis of the second support member 24A relative to the rotation shaft base 1 is the first axis O1, which is the central axis of the first rotation shaft 242 and the first shaft hole 1b. The first axis O1 is parallel to the longitudinal direction of the rotation shaft base 1 (ie, the Y-axis direction).

[0131] In some embodiments, referring to Figures 6a-6c and Figure 7, which is a partial enlarged view of region I of the pivot mechanism 203 shown in Figure 5i, the second support member 24A is slidably and rotatably connected to the first support member 23A. In some embodiments, the first swing arm assembly 2A may further include a first slide rail 231 and a first sliding member 243.

[0132] The first slide rail 231 is provided on the first support member 23A. Optionally, the first slide rail 231 may be located on the back side of the first support member 23A, that is, the first slide rail 231 is located on the side of the first support member 23A that is opposite to the first support surface m1A. The first slide rail 231 may be a groove-type slide rail. In other examples, the first slide rail 231 may also be a rod-type slide rail. The following embodiments are further introduced based on the first slide rail 231 being a groove-type slide rail, which cannot be regarded as a special limitation on the present application.

[0133] The first rail 231 has a first end d1 and a second end d2 along its length. The second end d2 is closer to the hinge base 1 than the first end d1. In other words, the distance from the second end d2 to the hinge base 1 is shorter than the distance from the first end d1 to the hinge base 1.

[0134] The first sliding member 243 is disposed on the second support member 24A and is slidably and rotatably connected to the first slide rail 231. When the hinge mechanism 203 is in the unfolded state, the first sliding member 243 is located at the first end d1. When the hinge mechanism 203 is in the folded state, the first sliding member 243 is located at the second end d2.

[0135] Thus, when the hinge mechanism 203 switches from the unfolded state to the folded state, the distance between the second support member 24A and the first support member 23A is increased, thereby increasing the height of the space within the hinge mechanism 203 in the folded state that accommodates the third display area 103. This effectively avoids the third display area 103 and prevents the foldable screen 10 from being squeezed by the hinge base 1. When the hinge mechanism 203 switches from the folded state to the unfolded state, the distance between the second support member 24A and the first support member 23A is reduced, and the position of the hinge base 1 is raised to effectively support the third display area 103.

[0136] In the above embodiment, the slidable and rotatable connection between the first sliding member 243 and the first sliding rail 231 can be a high-pair matching structure of line-surface contact or point-surface contact, or a structure formed by connecting a slidable structure and a rotatable structure in series.

[0137] In some embodiments, please continue to refer to Figures 6a-6c and 7. The first sliding member 243 can be slidably accommodated in the first slide rail 231. The first sliding member 243 can be cylindrical, roller-shaped, needle-shaped, drum-shaped, or roller-shaped. This application uses the first sliding member 243 in a cylindrical shape for illustrative purposes. The cross-sectional shape of the first sliding member 243 can be circular, elliptical, or irregular. The first sliding member 243 can rotate within the first slide rail 231 while sliding along the first slide rail 231. In this way, the outer peripheral surface of the first sliding member 243 is in line-surface contact with the inner side surface of the first slide rail 231. The first sliding member 243 can rotate relative to the first slide rail 231 during the process of sliding along the first slide rail 231. This component structure is simple, the assembly efficiency is high, and the cost is low.

[0138] In yet other embodiments, please refer to Figure 8, which is a partial enlarged view of the pivot base 1, first support member 23A, and second support member 24A provided in yet other embodiments of the present application. In this embodiment, the first sliding member 243 is rotatably connected to the second support member 24A via a pivot a. The first sliding member 243 is block-shaped and has a first side surface S1 and a second side surface S2 that face each other. The first sliding member 243 is slidably received within the first slide rail 231, with the first side surface S1 and the second side surface S2 facing opposite inner side surfaces of the first slide rail 231, respectively. Thus, while sliding along the first slide rail 231, the first sliding member 243 is unable to rotate relative to the first slide rail 231. By means of the pivot a, the first sliding member 243 is rotatable relative to the second support member 24A, forming a slidable and rotatable connection structure, thereby achieving both a slidable and rotatable connection between the first sliding member 243 and the first slide rail 231.

[0139] The following embodiments are further described based on the line-surface contact between the outer peripheral surface of the first sliding member 243 and the inner side surface of the first sliding rail 231 , which cannot be considered as a special limitation to the present application.

[0140] In some embodiments, referring back to FIG. 7 , a vertical distance from the second end d2 to the first support surface m1A is greater than a vertical distance from the first end d1 to the first support surface m1A. In other words, a vertical distance h1 from the second end d2 to the first support surface m1A is greater than a vertical distance h2 from the first end d1 to the first support surface m1A.

[0141] The vertical distance from the first end d1 to the first supporting surface m1A refers to the vertical distance from the geometric center of the cross-section of the first sliding member 243 along the XZ plane to the first supporting surface m1A when the first sliding member 243 is at the first end d1. The vertical distance from the second end d2 to the first supporting surface m1A refers to the vertical distance from the geometric center of the cross-section of the first sliding member 243 along the XZ plane to the first supporting surface m1A when the first sliding member 243 is at the second end d2.

[0142] In this way, when the hinge mechanism 203 switches from the unfolded state to the folded state, the end of the second support member 24A facing the first support member 23A moves a certain distance toward the back side of the first support surface mlA, which can increase the width of the partial space in the hinge mechanism 203 in the folded state for accommodating the third display area 103 along the X-axis direction, increase the avoidance space of the third display area 103, and reduce the probability of creases in the third display area 103.

[0143] In the above embodiment, from the first end d1 to the second end d2, the first slide rail 231 can extend along a straight trajectory, or along a curved trajectory such as an arc, an S-shaped line, or an n-shaped line. The accompanying drawings illustrate the extension of the first slide rail 231 along a straight trajectory, which cannot be considered as a special limitation to the present application.

[0144] In some embodiments, referring to Figure 7 , the first slide rail 231 extends along a straight track from the first end d1 to the second end d2 and is inclined away from the first support surface m1A. This structure is simple and easy to form.

[0145] Based on the above, the inclination angle of the first slide rail 231 relative to the first support surface m1A can be less than or equal to 30°. For example, the inclination angle can be 8°, 10°, 12°, 15°, 18°, 20°, 25° or 30°.

[0146] In some embodiments, referring back to FIG. 6c , the first support member 23A has two first protrusions 232 on its surface facing away from the first support surface m1A. The two first protrusions 232 are spaced apart along the Y-axis. There are also two first rails 231 , each mounted on one of the first protrusions 232 .

[0147] Based on the above, please continue to refer to Figure 6c, and in conjunction with Figures 5c and 5d, the end of the second support member 24A facing the first support member 23A is provided with two second connecting arms 244. The two second connecting arms 244 are located between the two first protrusions 232 and are also spaced apart along the Y-axis. Based on this, the number of first sliding members 243 can also be two, with the two first sliding members 243 respectively disposed on the outer end surfaces of the two second connecting arms 244. The outer end surfaces of the two second connecting arms 244 refer to the two end surfaces of the two second connecting arms 244 that face each other. The two first sliding members 243 are each slidably and rotatably connected to the corresponding first slide rail 231.

[0148] In this way, the two second connecting arms 244 are stopped and limited by the two first protrusions 232 , so that the second support member 24A can be prevented from separating from the first support member 23A along the Y-axis direction, thereby ensuring structural stability.

[0149] In other embodiments, the two first protrusions 232 may also be located between the two second connecting arms 244, with the two first sliding members 243 respectively disposed on the inner end surfaces of the two second connecting arms 244. The inner end surfaces of the two second connecting arms 244 refer to the two facing end surfaces of the two second connecting arms 244. This can also prevent the second support member 24A from separating from the first support member 23A along the Y-axis direction, thereby ensuring structural stability.

[0150] In some embodiments, referring to Figure 6c , a portion of the first end d1 of the first sliding member 243 extends into the first support member 23A. To this end, a relief groove 233 recessed toward the first support surface m1A is provided on the surface of the first support member 23A facing away from the first support surface m1A. The relief groove 233 communicates with the portion of the first end d1 extending into the first support member 23A. The relief groove 233 is used to accommodate a portion of the second connecting arm 244 when the hinge mechanism 203 is in the deployed state. This allows the distance from the first slide rail 231 to the first support surface m1A to be shortened while maintaining a certain thickness and structural strength of the first support member 23A, facilitating a thinner profile for the hinge mechanism 203 and, ultimately, the entire device.

[0151] In some embodiments, please refer to FIG9 , which is a perspective view of the assembly structure of the rotating shaft base 1, the first support member 23A, and the second support member 24A in the first swing arm assembly 2A provided in some other embodiments of the present application. The first protrusion 232 includes a first portion 2321 and a second portion 2322 located on opposite sides of the length direction of the first slide rail 231. Compared to the first portion 2321, the second portion 2322 is farther away from the first support surface m1A. In other words, the distance from the second portion 2322 to the first support surface m1A is greater than the distance from the first portion 2321 to the first support surface m1A.

[0152] On the basis of the above, the second part 2322 is provided with a notch 2323, which connects the first slide rail 231 and the side of the second part 2322 facing away from the first slide rail 231, and the width of the notch 2323 along the length direction of the first slide rail 231 can be greater than or equal to the cross-sectional width of the first sliding member 243.

[0153] In this way, the first sliding member 243 can be installed into the first slide rail 231 through the notch 2323 , which facilitates the assembly of the second support member 24A and the first support member 23A and improves assembly efficiency.

[0154] In some embodiments, a stop structure (not shown) may be provided in the notch 2323 to prevent the first sliding member 243 from falling out of the notch 2323. The stop structure may be a filler filled in the notch 2323, a solder welded in the notch 2323, or a bump, a column, a grille, etc. fixed to the inner wall of the notch 2323, and this application does not specifically limit this.

[0155] To facilitate assembly of the second support member 24A with the first support member 23A, in some further embodiments, please refer to FIG. 10 , which is a perspective view of the assembly structure of the rotating shaft base 1, the first support member 23A, and the second support member 24A in the first swing arm assembly 2A provided in some further embodiments of the present application. The two second connecting arms 244 are respectively located on the same side of the two first protrusions 232, and the two first sliding members 243 are respectively located on the same side of the two second connecting arms 244. In this way, the two first sliding members 243 can be inserted into the two first slide rails 231 from the same side of the two first protrusions 232, and the second support member 24A and the first support member 23A can be assembled without providing a notch.

[0156] The above embodiments introduce the structure of the second support member 24A and the connection method between the second support member 24A and the shaft base 1 and the first support member 23A. The following focuses on the connection method between the shaft base 1, the first swing arm 21A, the first connecting member 22A and the first support member 23A.

[0157] Please refer to Figures 11a-11e. Figure 11a is a three-dimensional view of the assembly structure of the lower base 12 in the rotating shaft mechanism 203 shown in Figures 5a-5i and the first swing arm 21A and the first connecting member 22A in the first swing arm assembly 2A in a folded state. Figure 11b is a three-dimensional view of the assembly structure shown in Figure 11a from another perspective. Figure 11c is a schematic diagram of the cross-sectional structure of the rotating shaft mechanism 203 shown in Figure 5b along the AA direction. Figure 11d is a schematic diagram of the cross-sectional structure of the rotating shaft mechanism 203 shown in Figure 5b along the BB direction. Figure 11e is a simplified structural diagram of the assembly structure shown in Figure 11a.

[0158] The first swing arm 21A is rotatably connected to the shaft base 1 .

[0159] Optionally, the first swing arm 21A may be provided with a first arcuate slide 211. The front end of the lower base 12 includes a concave arcuate surface s1, and the back end of the upper base 11 (see Figure 5e) includes a convex arcuate surface s2. The convex arcuate surface s2 faces the concave arcuate surface s1, and a first arcuate groove 1c (see Figure 11a) is formed between the convex arcuate surface s2 and the concave arcuate surface s1. The first arcuate slide 211 is accommodated in the first arcuate groove 1c and can slide along the first arcuate groove 1c, thereby achieving a rotatable connection between the first swing arm 21A and the rotating shaft base 1.

[0160] The arc-shaped chute and the arc-shaped slide are not completely circular structures, so the thickness of the shaft base 1 can be reduced, which is conducive to the thinning of the entire machine. In other embodiments, the first swing arm 21A and the shaft base 1 can also be rotatably connected by a shaft and a shaft hole.

[0161] The rotation axis of the first swing arm 21A relative to the shaft base 1 is the second axis O2, which is the center line of the first arc-shaped sliding groove 1c and is parallel to the first axis O1.

[0162] In some embodiments, the rotation axis of the second support member 24A relative to the rotation shaft base 1 (i.e., the first axis O1) and the rotation axis of the first swing arm 21A relative to the rotation shaft base 1 (i.e., the second axis O2) may not be colinear, and the second support member 24A can be slidably and rotatably connected to the first support member 23A.

[0163] In this way, when the first swing arm 21A rotates between the unfolded position and the folded position, the rotation angle of the second support member 24A and the rotation angle of the first support member 23A can be set to be different, so as to improve design flexibility.

[0164] In other embodiments, the rotation axis of the second support member 24A relative to the shaft base 1 and the rotation axis of the first swing arm 21A relative to the shaft base 1 can also be colinear. Based on this, the second support member 24A can be fixedly connected to the first support member 23A by means of threaded connection, clamping, welding, etc.

[0165] In this way, when the first swing arm 21A rotates between the unfolded position and the folded position, the second support member 24A rotates synchronously with the first support member 23A, and the directions and angles of rotation of the two are the same. This structure is simple and easy to implement.

[0166] The embodiment of the present application is further described on the basis that the rotation axis of the second support member 24A is not colinear with the rotation axis of the first swing arm 21A, which cannot be regarded as a special limitation on the constitution of the present application.

[0167] The first connecting member 22A is rotatably connected to the first swing arm 21A.

[0168] In some embodiments, referring to Figures 11a and 11c, the first swing arm assembly 2A may further include a second rotating shaft 221 and a second axial hole 212. The second rotating shaft 221 may be disposed on the first connecting member 22A, and the second axial hole 212 may be disposed on the first swing arm 21A. In other embodiments, the second rotating shaft 221 may also be disposed on the first swing arm 21A, and the second axial hole 212 may also be disposed on the first connecting member 22A. The second rotating shaft 221 is inserted into the second axial hole 212 to achieve a rotatable connection between the first swing arm 21A and the first connecting member 22A. The second axial hole 212 limits the second rotating shaft 221 within a 360° range around the second rotating shaft 221, so that the second rotating shaft 221 cannot radially escape from the second axial hole 212, thereby providing a high degree of connection stability.

[0169] In other embodiments, the first swing arm 21A and the first connecting member 22A may also be rotatably connected by adopting a rotatable connection structure composed of an arc-shaped sliding member and an arc-shaped sliding groove.

[0170] Based on the above embodiment, the first connecting member 22A is fixed to the first housing 201 (see Figure 3). When the first housing 201 is subjected to an opening and closing force from the user, the first swing arm 21A can rotate relative to the hinge base 1, and the first connecting member 22A can rotate relative to the first swing arm 21A, so that the first housing 201 can switch between the unfolded state and the folded state.

[0171] Based on this, in order to ensure the movement stability of the first shell 201, in some embodiments, please refer to Figures 11a to 11e, the first swing arm assembly 2A may further include a second swing arm 25A.

[0172] The second swing arm 25A is rotatably connected to the rotating shaft base 1. Optionally, referring to Figure 11a and in combination with Figure 5d, a third axial hole 1d is further provided on the two brackets 1a, and the third axial holes 1d on the two brackets 1a are coaxially arranged. The first swing arm assembly 2A also includes a third rotating shaft 1e, which is passed through the third axial hole 1d on the two brackets 1a. The second swing arm 25A is provided with a fourth axial hole 251, and the third rotating shaft 1e is also passed through the fourth axial hole 251 to achieve rotatable connection between the second swing arm 25A and the rotating shaft base 1. The third rotating shaft 1e limits the second swing arm 25A within a 360° range around the fourth axial hole 251, so that the second swing arm 25A cannot disengage from the third rotating shaft 1e along the radial direction of the fourth axial hole 251, thereby achieving high connection stability.

[0173] The rotation axis of the second swing arm 25A relative to the rotation shaft base 1 is the third axis O3, which is the central axis of the third shaft hole 1d, the fourth shaft hole 251 and the third rotation shaft 1e. The third axis O3 is parallel to the first axis O1.

[0174] The first connecting member 22A is slidably connected to the second swing arm 25A. Optionally, referring to Figure 11a, the front surface of the first connecting member 22A is provided with a first sliding groove 222 that is recessed toward the back of the first connecting member 22A. Two second sliding grooves 223 that are recessed away from each other are provided on opposite sides of the first sliding groove 222. The second swing arm 25A includes a first sliding portion 252 and two second sliding portions 253 located on opposite sides of the first sliding portion 252. The first sliding portion 252 is slidably received in the first sliding groove 222, and the two second sliding portions 253 are slidably received in the two second sliding grooves 223, respectively. This achieves a slidable connection between the second swing arm 25A and the first connecting member 22A. Furthermore, the two second sliding grooves 223 cooperate with the two second sliding portions 253 to prevent the second swing arm 25A from detaching from the front side of the first connecting member 22A.

[0175] The extension direction of the first slide groove 222 and the extension direction of the second slide groove 223 are both perpendicular to the length direction of the hinge base 1 (that is, the Y-axis direction), so that the sliding direction of the second swing arm 25A and the first connecting member 22A is perpendicular to the length direction of the hinge base 1.

[0176] In this way, when the hinge mechanism 203 switches between the unfolded state and the folded state, the second swing arm 25A can slide relative to the first connecting member 22A to limit the movement trajectory of the first connecting member 22A, so that the degree of freedom of the assembly composed of the hinge base 1, the first swing arm 21A, the first connecting member 22A, and the second swing arm 25A is 1, and the movement is unique, thereby ensuring the movement stability of the first shell 201.

[0177] Optionally, when the hinge mechanism 203 switches from the unfolded state to the folded state, the first connecting member 22A slides relative to the second swing arm 25A in the direction away from the hinge base 1, which can support the first support member 23A to move relative to the second support member 24A in the direction away from the hinge base 1, so as to increase the distance between the first support member 23A and the second support member 24A, increase the support length of the hinge mechanism 203, effectively avoid the third display area 103, and reduce the probability of the folding screen 10 generating creases in the third display area 103.

[0178] When the hinge mechanism 203 switches from the folded state to the unfolded state, the first connecting member 22A slides toward the hinge base 1 relative to the second swing arm 25A, shortening the distance between the first support member 23A and the second support member 24A, and lifting the hinge base 1 to effectively support the third display area 103.

[0179] Similarly, referring to FIG. 11d , and in conjunction with FIG. 5d and FIG. 5e , the second swing arm assembly 2B may further include a fourth swing arm 25B. The fourth swing arm 25B is rotatably connected to the pivot base 1 via a fourth rotation axis 1f . The second connecting member 22B is slidably connected to the fourth swing arm 25B to restrict the motion trajectory of the second connecting member 22B. This ensures that the assembly consisting of the pivot base 1 , the third swing arm 21B, the second connecting member 22B, and the fourth swing arm 25B has one degree of freedom and unique motion, thereby ensuring the motion stability of the second housing 202 .

[0180] Please refer to Figures 12a to 12e. Figure 12a is a three-dimensional view of the assembly structure of the rotating shaft base 1 and the first swing arm assembly 2A in the rotating shaft mechanism 203 shown in Figures 5a to 5i. Figure 12b is a three-dimensional view of the assembly structure shown in Figure 12a from another perspective. Figure 12c is a three-dimensional view of the assembly structure of the first connecting member 22A, the second swing arm 25A and the first support member 23A in the first swing arm assembly 2A in the assembly structure shown in Figure 12a. Figure 12d is a schematic diagram of the cross-sectional structure of the assembly structure shown in Figure 12c along the CC direction. Figure 12e is a simplified structural diagram of the assembly structure shown in Figure 12a.

[0181] The first support member 23A can be rotatably connected to the first connecting member 22A. Optionally, as shown in Figure 12a and in conjunction with Figures 6b and 6c, the back of the first support member 23A is further provided with a second protrusion 234, which is provided with a second arc-shaped slide 235. As shown in Figure 12a and in conjunction with Figures 11a and 11b, the first connecting member 22A is provided with a third protrusion 224, which is provided with a second arc-shaped chute 225. The second arc-shaped slide 235 can be slidably received within the second arc-shaped chute 225 to achieve rotatable connection between the first support member 23A and the first connecting member 22A. The arc-shaped chute and the arc-shaped slide are not completely circular structures, thereby reducing the thickness of the first support member 23A, which facilitates the thinning of the first swing arm assembly 2A and the entire device.

[0182] In some embodiments, there may be two second protrusions 234, which are spaced apart along the Y-axis. There may also be two second arc-shaped slides 235, which are respectively disposed on the inner end surfaces of the two second protrusions 234. The inner end surfaces of the two second protrusions 234 refer to the two end surfaces of the two second protrusions 234 that face each other.

[0183] Based on the above, the number of third protrusions 224 is also two, and the two third protrusions 224 are spaced apart along the Y-axis direction. The two third protrusions 224 are located between the two second protrusions 234. The number of second arc-shaped chutes 225 is also two, and the two second arc-shaped chutes 225 are respectively provided on the outer end surfaces of the two third protrusions 224. The outer end surfaces of the two third protrusions 224 refer to the two end surfaces of the two third protrusions 224 that face each other. The two second arc-shaped slides 235 are respectively slidably received in the two second arc-shaped chutes 225. In this way, the two second protrusions 234 cooperate with the two third protrusions 224 to stop, thereby preventing the first support member 23A from separating from the first connecting member 22A along the Y-axis direction.

[0184] The rotation axis of the first supporting member 23A relative to the first connecting member 22A is the fourth axis O4 , and the fourth axis O4 is parallel to the first axis O1 .

[0185] In other embodiments, the first supporting member 23A and the first connecting member 22A may also be rotatably connected by using a rotating shaft and an axial hole.

[0186] On the basis of the above embodiments, in order to ensure the movement stability of the first support member 23A, in some embodiments, please refer to Figure 12d, and in combination with Figure 6c and Figure 11a, the first swing arm assembly 2A may also include a second slide rail 236 and a second sliding member 254.

[0187] The second slide rail 236 is disposed on the first support member 23A. Optionally, the second slide rail 236 may be located on the back side of the first support member 23A. The second slide rail 236 may be a slot-type slide rail. In other examples, the second slide rail 236 may also be a bar-type slide rail. The following embodiments are further described based on the second slide rail 236 being a slot-type slide rail, and this should not be considered a special limitation of the present application.

[0188] The second slide rail 236 has a third end d3 and a fourth end d4 at its two ends in the longitudinal direction. The fourth end d4 is closer to the shaft base 1 than the third end d3. In other words, the distance from the fourth end d4 to the shaft base 1 is shorter than the distance from the third end d3 to the shaft base 1.

[0189] Referring to Figure 12d in conjunction with Figure 11a , a second sliding member 254 is disposed on the second swing arm 25A. The second sliding member 254 is slidably and rotatably connected to the second slide rail 236. When the first swing arm 21A is in the extended position, the second sliding member 254 is located at the third end d3. When the first swing arm 21A is in the folded position, the second sliding member 254 is located at the fourth end d4.

[0190] In this way, the sliding and rotatable connection structure formed by the second sliding member 254 and the second sliding rail 236 can constrain the rotation direction and rotation speed of the first support member 23A relative to the first connecting member 22A, so that the degree of freedom of the assembly composed of the first support member 23A, the first connecting member 22A, the first swing arm 21A and the second swing arm 25A is 1, the movement mode of the assembly is unique, and the movement stability of the first support member 23A can be ensured.

[0191] When the hinge mechanism 203 switches from the deployed state to the folded state, the first support member 23A slides relative to the second swing arm 25A in a direction away from the hinge base 1, enabling the first support member 23A to move relative to the second support member 24A away from the hinge base 1, thereby increasing the distance between the first support member 23A and the second support member 24A. When the hinge mechanism 203 switches from the folded state to the deployed state, the first support member 23A slides relative to the second swing arm 25A toward the hinge base 1, thereby shortening the distance between the first support member 23A and the second support member 24A.

[0192] In the above embodiment, the slidable and rotatable connection between the second sliding member 254 and the second slide rail 236 can be a high-pair matching structure of line-surface contact or point-surface contact, or a connection structure of a slidable structure and a rotatable structure.

[0193] In some embodiments, please refer to FIG12d and refer to FIG11a in combination, the second sliding member 254 can be slidably accommodated in the second slide rail 236, and the first sliding member 243 can be cylindrical, roller-shaped, needle-shaped, drum-shaped, or wheel-shaped. This application uses the second sliding member 254 in a cylindrical shape for exemplary description. The cross-sectional shape of the second sliding member 254 can be circular, elliptical, or irregular. The second sliding member 254 can rotate within the second slide rail 236 while sliding along the second slide rail 236. In this way, the outer peripheral surface of the second sliding member 254 is in line-surface contact with the inner side surface of the second slide rail 236. The second sliding member 254 can rotate relative to the second slide rail 236 during the process of sliding along the second slide rail 236. The component structure is simple, the assembly efficiency is high, and the cost is low.

[0194] In some embodiments, as shown in Figure 12d , the second slide rail 236 is located between the fourth axis O4 and the hinge base 1 (see Figures 12a and 12b ). Furthermore, the fourth end d4 is closer to the first support surface m1A than the third end d3. In other words, the vertical distance from the fourth end d4 to the first support surface m1A is shorter than the vertical distance from the third end d3 to the first support surface m1A.

[0195] The vertical distance from the third end d3 to the first supporting surface m1A refers to the vertical distance from the geometric center of the cross-section of the second sliding member 254 along the XZ plane to the first supporting surface m1A when the second sliding member 254 is at the third end d3. The vertical distance from the fourth end d4 to the first supporting surface m1A refers to the vertical distance from the geometric center of the cross-section of the second sliding member 254 along the XZ plane to the first supporting surface m1A when the second sliding member 254 is at the fourth end d4.

[0196] Please refer to FIG. 12 d , the end of the first support member 23A facing the rotation shaft base 1 is the first end n1 , and the end of the first support member 23A away from the rotation shaft base 1 is the second end n2 .

[0197] When the hinge mechanism 203 switches from the unfolded state to the folded state, the second sliding member 254 cooperates with the second slide rail 236 to force the first end n1 to tilt toward the back side of the first support member 23A relative to the second end n2 to avoid the third display area 103 (see Figure 3). The third display area 103 can be bent into a teardrop shape to avoid creases.

[0198] When the hinge mechanism 203 switches from the folded state to the unfolded state, the second sliding member 254 cooperates with the second slide rail 236 to force the first end n1 to rise toward the front side of the first support member 23A relative to the second end n2 to support the folding screen 10 and ensure the impact resistance of the folding screen 10.

[0199] In some embodiments, please refer to Figure 12d, from the third end d3 to the fourth end d4, the second slide rail 236 gradually extends in the direction close to the first support surface m1A. In this way, during the switching process of the hinge mechanism 203 from the unfolded state to the folded state, the second sliding member 254 cooperates with the second slide rail 236 to force the first end n1 relative to the second end n2 to gradually tilt toward the back side of the first support member 23A. During the switching process of the hinge mechanism 203 from the folded state to the unfolded state, the second sliding member 254 cooperates with the second slide rail 236 to force the first end n1 relative to the second end n2 to gradually lift toward the front side of the first support member 23A. The smoothness of the movement is better, which can prevent impact on the folding screen 10.

[0200] From the third end d3 to the fourth end d4, the second slide rail 236 can extend along a straight trajectory, or along a curved trajectory such as an arc, an S-shaped line, or an n-shaped line. This application uses the extension of the second slide rail 236 along an arc-shaped trajectory as an example, which cannot be considered as a special limitation to this application.

[0201] Optionally, as shown in Figure 12d, the arc-shaped extension path of the second slide rail 236 is convex in a direction away from the first support surface m1A. This can further improve the smoothness of the movement of the first end n1 relative to the second end n2 when the hinge mechanism 203 switches between the unfolded and folded states, preventing impact on the folding screen 10.

[0202] In the above embodiment, the curvature radius of each position on the arc-shaped trajectory may be equal or unequal, and this application does not make any specific limitation on this.

[0203] In some embodiments, please refer to Figures 12a-12d, and in combination with Figure 11a and Figure 6c, the first support member 23A is located on the front side of the second swing arm 25A, and a mounting protrusion 237 is provided on the back side of the first support member 23A, and the second slide rail 236 is set on the mounting protrusion 237.

[0204] A first avoidance notch 26 is defined on the front end of the first sliding portion 252 and is recessed toward the back of the first sliding portion 252 . The second sliding member 254 is disposed in the first avoidance notch 26 and is fixed to the first sliding portion 252 .

[0205] At least a portion of the mounting protrusion 237 is accommodated in the first avoidance gap 26 , and when the first sliding portion 252 and the two second sliding portions 253 slide along the first sliding groove 222 and the two second sliding grooves 223 respectively, the first avoidance gap 26 allows the mounting protrusion 237 to move therein.

[0206] In this way, by accommodating at least part of the mounting protrusion 237 with the help of the first avoidance gap 26, thickness overlap can be avoided, which is beneficial to reducing the thickness of the first swing arm assembly 2A and even the entire machine, and improving the compactness of the structure.

[0207] In some embodiments, as shown in FIG6c , there can be two second rails 236 , one disposed on each of the two end surfaces of the mounting protrusion 237 aligned along the Y-axis. As shown in FIG11a , there can also be two second sliding members 254 , one disposed on each of the two inner side surfaces of the first relief notch 26 aligned along the Y-axis. The two second sliding members 254 are slidably and rotatably connected to the two second rails 236 . This ensures that the two second sliding members 254 cooperate with the two second rails 236 to enhance the stability of the sliding connection, preventing one side of the mounting protrusion 237 from lifting out of the first relief notch 26 and preventing it from getting stuck.

[0208] In some embodiments, referring to Figures 12a-12d and in combination with Figure 11a, the first avoidance gap 26 passes through the back surface of the first sliding portion 252. In other words, the first avoidance gap 26 penetrates the entire first sliding portion 252.

[0209] On this basis, the first connecting member 22A is provided with a second relief notch 27. The second relief notch 27 is opposite to the first relief notch 26. The mounting protrusion 237 is partially accommodated in the second relief notch 27. When the first sliding portion 252 and the two second sliding portions 253 slide along the first guide groove 222 and the two second guide grooves 223, respectively, the second relief notch 27 allows the mounting protrusion 237 to move therein.

[0210] In this way, by accommodating the portion of the mounting protrusion 237 by means of the second avoidance gap 27, thickness overlap can be avoided, which is beneficial to reducing the thickness of the first swing arm assembly 2A and even the entire machine, and improving the compactness of the structure.

[0211] The above embodiment is illustrative of the second sliding member 254 being arranged on the second swing arm 25A. In some other embodiments, the second sliding member 254 may also be arranged on the first swing arm 21A, so as to constrain the movement of the first support member 23A by means of the second sliding member 254 on the first swing arm 21A cooperating with the second slide rail 236 of the first support member 23A.

[0212] In some other embodiments, a sliding tongue may be provided, one end of which is rotatably connected to the shaft base 1 and the other end of which is slidably connected to the first support member 23A, so as to constrain the movement of the first support member 23A by means of the sliding tongue.

[0213] Please refer to Figure 13, which is a simplified structural diagram of the first swing arm assembly 2A provided in an embodiment of the present application. By adding a second support member 24A, the present application can achieve a thinner overall device while improving the continuity of the surface supporting the bendable area on the hinge mechanism 203, thereby enhancing the impact resistance of the bendable area within the foldable screen 10.

[0214] In some scenarios, such as when the foldable screen device 100 is in a folded state and falls to the ground, please refer to Figures 14a and 14b. Figure 14a shows the scene of the foldable screen device 100 including the hinge mechanism 203 shown in Figures 5a-5i falling to the ground, and Figure 14b shows the force analysis diagram of the internal hinge mechanism 203 of the foldable screen device 100 shown in Figure 14a when it falls to the ground. At the moment the foldable screen device 100 falls to the ground, the hinge base 1 is subjected to an impact force F from the ground. The first shell 201 and the second shell 202 continue to move downward under the action of inertia and apply impact forces F1 and F2 to the first connecting member 22A and the second connecting member 22B, respectively. Since the first connecting member 22A and the second swing arm 25A, as well as the second connecting member 22B and the fourth swing arm 25B are slidably connected by sliding pairs, the stability of the sliding pairs is relatively low. Under the action of the impact forces F1 and F2, the sliding pairs can slide relatively relatively, so that the part of the first connecting member 22A connected to the second swing arm 25A and the part of the second connecting member 22B connected to the fourth swing arm 25B can continue to move downward, thereby squeezing the third display area 103 of the folding screen 10 downward and forcing the third display area 103 to be deformed to a large extent or even damaged, resulting in low impact resistance of the folding screen device 100.

[0215] In order to solve the above problems, please refer to Figures 15a to 5f. Figure 15a is a three-dimensional view of the rotating shaft mechanism 203 provided in some embodiments of the present application in a folded state. Figure 15b is a three-dimensional view of the rotating shaft mechanism 203 shown in Figure 15a in a folded state from another perspective. Figure 15c is a three-dimensional view of the assembly structure of the rotating shaft base 1 and the first swing arm assembly 2A in the rotating shaft mechanism 203 shown in Figure 15a in a folded state. Figure 15d is a three-dimensional view of the assembly structure shown in Figure 15c from another perspective. Figure 15e is a main view of the assembly structure shown in Figure 15d when viewed from direction D6. Figure 15f is a schematic diagram of a cross-sectional structure of the rotating shaft mechanism 203 shown in Figure 15a.

[0216] The second support member 24A is provided with a first stopper 241A, which can be located on the side of the second support member 24A facing away from the second support surface m2A. The first connecting member 22A is provided with a second stopper 221A, which can be located on the end of the first connecting member 22A facing the rotating shaft base 1.

[0217] When the hinge mechanism 203 is in the folded state, the second stop portion 221A is located on the side of the first stop portion 241A away from the hinge base 1. In this state, please refer to Figures 15a and 15b. The end surface of the first stop portion 241A facing the second stop portion 221A is defined as the first end surface K1, and the end surface of the second stop portion 221A facing the first stop portion 241A is defined as the second end surface K2. In the folded state, along the sliding direction of the first connecting member 22A relative to the second swing arm 25A (i.e., direction D7), at least a portion of the first end surface K1 faces at least a portion of the second end surface K2. In other words, the projection of the first end surface K1 onto the second end surface K2 along direction D7 overlaps with the second end surface K2.

[0218] In this way, the first stop portion 241A can cooperate with the second stop portion 221A to release the impact force F1 from the first shell to the second support member 24A, avoiding large relative sliding between the first connecting member 22A and the second swing arm 25A at the moment of falling, thereby reducing the deformation of the third display area 103 and reducing the probability of damage to the third display area 103.

[0219] In some embodiments, referring to Figures 15a-15f, there are two first stoppers 241A, spaced apart along the Y-axis and located on opposite sides of the second swing arm 25A. There are also two second stoppers 221A, spaced apart along the Y-axis and located on opposite sides of the second swing arm 25A. The two first stoppers 241A correspond one-to-one with the two second stoppers 221A, with each first stopper 241A cooperating with the corresponding second stopper 221A to provide a stop. This embodiment utilizes the two first stoppers 241A and the two second stoppers 221A to provide a stop, thereby increasing stopping force and stability.

[0220] The first stop portion 241A and the second support member 24A can be an integral structural member, or can be independent of the second support member 24A and fixedly connected to the second support member 24A. The present application is illustratively described with the first stop portion 241A and the second support member 24A as an integral structural member, which cannot be regarded as a special limitation to the present application.

[0221] Similarly, the second stop portion 221A and the first connecting member 22A may be an integral structural member, or may be independent of the first connecting member 22A and fixedly connected to the first connecting member 22A. This application is illustrative of the second stop portion 221A and the first connecting member 22A as an integral structural member, which cannot be considered as a special limitation on this application.

[0222] Based on the above embodiment, please continue to refer to Figures 15a-15f. The second support member 24A is provided with a third stopper 242A, which can be located on the side of the second support member 24A facing away from the second support surface m2A. The second swing arm 25A is provided with a fourth stopper 251A.

[0223] When the hinge mechanism 203 is in the folded state, the fourth stopper 251A is located between the third stopper 242A and the hinge base 1. In this state, referring specifically to Figures 15a and 15b , the end surface of the third stopper 242A facing the fourth stopper 251A is defined as the third end surface K3, and the end surface of the fourth stopper 251A facing the third stopper 242A is defined as the fourth end surface K4. In the folded state, along direction D7, at least a portion of the third end surface K3 faces at least a portion of the fourth end surface K4. In other words, the projection of the third end surface K3 onto the fourth end surface K4 along direction D7 overlaps with the fourth end surface K4.

[0224] In this way, the third stopper 242A can cooperate with the fourth stopper 251A to further release the impact force F1 from the first housing to the second swing arm 25A. This changes the release path of the impact force F1 from the original first connecting member 22A → second swing arm 25A to the first connecting member 22A → second support member 24A → second swing arm 25A in this embodiment. This changed release path provides greater stability, preventing significant relative sliding between the first connecting member 22A and the second swing arm 25A during a drop, thereby reducing the probability of damage to the third display area 103.

[0225] In some embodiments, referring to Figures 15a-15f, there are two third stops 242A, spaced apart along the Y-axis and located on opposite sides of the second swing arm 25A. There are also two fourth stops 251A, spaced apart along the Y-axis and located on opposite sides of the second swing arm 25A. The two third stops 242A correspond one-to-one with the two fourth stops 251A, with each third stop 242A cooperating with the corresponding fourth stop 251A to provide a stop. This embodiment utilizes the two third stops 242A and the two fourth stops 251A to provide a stop, thereby increasing stopping force and stability.

[0226] The third stop portion 242A and the second support member 24A can be an integral structural member, or can be independent of the second support member 24A and fixedly connected to the second support member 24A. The present application is illustratively described with the third stop portion 242A and the second support member 24A as an integral structural member, which cannot be regarded as a special limitation to the present application.

[0227] Similarly, the fourth stop portion 251A and the second swing arm 25A may be an integral structural component, or may be independent of the second swing arm 25A and fixedly connected to the second swing arm 25A. This application is illustrative of the fourth stop portion 251A and the second swing arm 25A as an integral structural component, which cannot be considered as a special limitation to this application.

[0228] In some embodiments, referring to Figures 15a-15f, when the hinge mechanism 203 is in the folded state, along direction D7, the distance between the first end surface K1 and the second end surface K2 is a first spacing, and the distance between the third end surface K3 and the fourth end surface K4 is a second spacing. The first spacing and the second spacing are both greater than 0 mm. The sum of the first spacing and the second spacing can be greater than or equal to 0.7 mm and less than or equal to 1.2 mm. Alternatively, the sum of the first spacing and the second spacing can be 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, or 1.2 mm.

[0229] Because the first and second spacings are greater than 0 mm, a certain amount of clearance is left between the first stop 241A and the second stop 221A, and between the third stop 242A and the fourth stop 251A, preventing the device from getting stuck when switching between the unfolded and folded states. Furthermore, because the sum of the first and second spacings is less than or equal to 1.2 mm, the compressive stress exerted by the hinge mechanism 203 on the third display area 103 under the action of the impact force F1 is reduced by 40%. Even if the first and second stop 241A and the third and fourth stop 242A and 251A come into contact, the hinge mechanism 203 will not significantly compress the third display area 103, thereby protecting the third display area 103 from damage.

[0230] Referring to Figure 15f in conjunction with Figures 16a-16e, Figure 16a is a perspective view of the rotating shaft mechanism 203 shown in Figures 15a and 15b in the unfolded state, Figure 16b is a bottom view of the rotating shaft mechanism 203 shown in Figure 16a, Figure 16c is a schematic cross-sectional view of the rotating shaft mechanism 203 shown in Figure 16b along the DD direction, Figure 16d is a schematic cross-sectional view of the assembly structure of the rotating shaft base 1 and the first swing arm assembly 2A within the rotating shaft mechanism 203 shown in Figure 16a in the semi-folded state, and Figure 16e is a schematic cross-sectional view of the assembly structure shown in Figure 16d along the EE direction. In this embodiment, the first stopper 241A has a first transition surface C1, the second stopper 221A has a second transition surface C2, the third stopper 242A has a third transition surface C3, and the fourth stopper 251A has a fourth transition surface C4. The first transition surface C1, the second transition surface C2, the third transition surface C3, and the fourth transition surface C4 can be inclined surfaces or rounded surfaces. This application uses the first transition surface C1, the second transition surface C2, the third transition surface C3, and the fourth transition surface C4 as inclined surfaces for illustrative purposes. When the hinge mechanism 203 switches between the folded and unfolded states, the first transition surface C1 cooperates with the second transition surface C2 to form a clearance, and the third transition surface C3 cooperates with the fourth transition surface C4 to form a clearance, thereby ensuring structural compactness and preventing jamming.

[0231] The above embodiments describe the stop assembly within the first swing arm assembly 2A (including the first stop portion 241A, the second stop portion 221A, the third stop portion 242A, and the fourth stop portion 251A). Similarly, a similar stop assembly can also be provided within the second swing arm assembly 2B to prevent significant relative sliding between the second connecting member 22B and the fourth swing arm 25B during a drop, thereby minimizing deformation of the third display area 103 and reducing the probability of damage to the third display area 103. The stop assembly within the second swing arm assembly 2B is identical to that within the first swing arm assembly 2A and is not further described here.

[0232] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0233] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A rotating shaft mechanism, characterized in that: include: Rotating shaft base; a first swing arm connected to the rotating shaft base; a first connecting member connected to the first swing arm; a first support member connected to the first connecting member, the first support member comprising a first support surface, the first support surface being used to support a portion of the folding screen; The second support member is connected between the rotating shaft base and the first support member, and the second support member includes a second support surface, and the second support surface is used to support another part of the folding screen.

2. The rotating shaft mechanism according to claim 1, characterized in that: The second supporting member is rotatably connected to the rotating shaft base, and the second supporting member is slidably and rotatably connected to the first supporting member.

3. The rotating shaft mechanism according to claim 2, characterized in that: Also includes: a first slide rail, disposed on the first support member, wherein the first slide rail has a first end and a second end in a length direction, and a distance from the second end to the rotation shaft base is smaller than a distance from the first end to the rotation shaft base; a first sliding member, disposed on the second supporting member, the first sliding member being slidably and rotatably connected to the first slide rail; When the rotating shaft mechanism is in an unfolded state, the first sliding member is located at the first end; when the rotating shaft mechanism is in a folded state, the first sliding member is located at the second end.

4. The rotating shaft mechanism according to claim 3, characterized in that: The first slide rail is a slot-type slide rail. The first sliding member is slidably accommodated in the first sliding rail, and the first sliding member can rotate in the first sliding rail while sliding along the first sliding rail.

5. The rotating shaft mechanism according to claim 3 or 4, characterized in that: The first slide rail is arranged on a side of the first support member facing away from the first support surface, and a vertical distance from the second end to the first support surface is greater than a vertical distance from the first end to the first support surface.

6. The rotating shaft mechanism according to claim 5, characterized in that: The first slide rail extends along a straight track from the first end to the second end and is inclined in a direction away from the first supporting surface.

7. The rotating shaft mechanism according to any one of claims 1 to 6, characterized in that: The first swing arm is rotatably connected to the rotating shaft base, and the first connecting member is rotatably connected to the first swing arm; The rotating shaft mechanism further includes: The second swing arm is rotatably connected to the pivot base, and the first connecting member is slidably connected to the second swing arm; when the pivot mechanism switches from an unfolded state to a folded state, the first connecting member slides relative to the second swing arm in a direction away from the pivot base.

8. The rotating shaft mechanism according to claim 7, characterized in that: The first supporting member is rotatably connected to the first connecting member; The rotating shaft mechanism further includes: a second slide rail, disposed on the first support member, wherein the second slide rail has a third end and a fourth end at its longitudinal ends, and a distance from the fourth end to the rotation shaft base is smaller than a distance from the third end to the rotation shaft base; a second sliding member, disposed on the second swing arm, the second sliding member being slidably and rotatably connected to the second slide rail; When the rotating shaft mechanism is in an unfolded state, the second sliding member is located at the third end; when the rotating shaft mechanism is in a folded state, the second sliding member is located at the fourth end.

9. The rotating shaft mechanism according to claim 8, characterized in that: The second slide rail is a slide groove type slide rail, the second sliding member can be slidably accommodated in the second slide rail, and the second sliding member can rotate in the second slide rail while sliding along the second slide rail.

10. The rotating shaft mechanism according to claim 8 or 9, characterized in that: The second slide rail is located on a side of the first support member facing away from the first support surface, and the second slide rail is also located between the rotation axis of the first support member relative to the first connecting member and the rotation shaft base; A vertical distance from the fourth end to the first supporting surface is smaller than a vertical distance from the third end to the first supporting surface.

11. The rotating shaft mechanism according to claim 10, characterized in that: From the third end to the fourth end, the second slide rail gradually extends toward the first supporting surface.

12. The rotating shaft mechanism according to claim 11, characterized in that: The second slide rail extends along an arc track, and the arc track protrudes in a direction away from the first supporting surface.

13. The rotating shaft mechanism according to any one of claims 8 to 12, characterized in that: A first sliding groove is provided on a surface of the first connecting member facing the folding screen and is recessed toward a surface of the first connecting member facing away from the folding screen, and two second sliding grooves are provided on two opposite sides of the first sliding groove and are recessed away from each other; The second swing arm includes a first sliding portion and two second sliding portions located on opposite sides of the first sliding portion. The first sliding portion can be slidably accommodated in the first sliding groove, and the two second sliding portions can be slidably accommodated in the two second sliding grooves respectively.

14. The rotating shaft mechanism according to claim 13, wherein: The first support member is located on a side of the second swing arm facing the folding screen, a surface of the first support member facing away from the first support surface is provided with a mounting protrusion, and the second slide rail is provided on the mounting protrusion; A first avoidance notch is provided on a surface of the first sliding portion facing the folding screen and is recessed toward a surface of the first sliding portion facing away from the folding screen. The second sliding member is disposed in the first avoidance notch and is fixed to the first sliding portion. At least a portion of the mounting protrusion is accommodated in the first avoidance gap, and when the first sliding portion and the two second sliding portions slide along the first sliding groove and the two second sliding grooves respectively, the first avoidance gap allows the mounting protrusion to move in the first avoidance gap.

15. The rotating shaft mechanism according to claim 14, characterized in that: There are two second slide rails, and the two second slide rails are respectively arranged on two end surfaces of the mounting protrusion arranged along the length direction of the rotating shaft base; There are two second sliding members, and the two second sliding members are respectively arranged on the two inner side surfaces of the first avoidance gap arranged along the length direction of the rotating shaft base. The two second sliding members are respectively slidably and rotatably connected to the two second slide rails.

16. The rotating shaft mechanism according to claim 15, characterized in that: The first avoidance notch passes through the surface of the first sliding portion facing away from the folding screen; A second avoidance notch is provided on the first connecting member, and the second avoidance notch is opposite to the first avoidance notch. Part of the mounting protrusion is accommodated in the second avoidance notch, and when the first sliding part and the two second sliding parts slide along the first sliding groove and the two second sliding grooves respectively, the second avoidance notch allows the mounting protrusion to move therein.

17. The rotating shaft mechanism according to any one of claims 7 to 16, characterized in that: The second supporting member is provided with a first stop portion, and the first connecting member is provided with a second stop portion; When the pivot mechanism is in a folded state, the second stop portion is located on a side of the first stop portion away from the pivot base, and along the sliding direction of the first connecting member relative to the second swing arm, at least a portion of the end surface of the first stop portion facing the second stop portion faces at least a portion of the end surface of the second stop portion facing the first stop portion.

18. The rotating shaft mechanism according to claim 17, wherein: The second support member is provided with a third stop portion, and the second swing arm is provided with a fourth stop portion; When the pivot mechanism is in a folded state, the fourth stop portion is located between the third stop portion and the pivot base, and along the sliding direction of the first connecting member relative to the second swing arm, at least a portion of the end surface of the third stop portion facing the fourth stop portion faces at least a portion of the end surface of the fourth stop portion facing the third stop portion.

19. The rotating shaft mechanism according to claim 18, characterized in that: When the rotating shaft mechanism is in a folded state, along the sliding direction of the first connecting member relative to the second swing arm, a distance between an end surface of the first stop portion facing the second stop portion and an end surface of the second stop portion facing the first stop portion is a first distance, and a distance between an end surface of the third stop portion facing the fourth stop portion and an end surface of the fourth stop portion facing the third stop portion is a second distance; The first spacing and the second spacing are both greater than 0 mm, and the sum of the first spacing and the second spacing is greater than or equal to 0.7 mm and less than or equal to 1.2 mm.

20. A folding screen device, characterized in that: include: Folding screen; a first shell; The hinge mechanism according to any one of claims 1 to 19, wherein the first connecting member of the hinge mechanism is connected to the first shell, and the folding screen is at least partially supported on the first shell, the first supporting surface of the first supporting member, and the second supporting surface of the second supporting member.

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