A rotating shaft mechanism and electronic device

Abstract

The application discloses a rotating shaft mechanism and an electronic device, which are used for reducing the size of the rotating shaft mechanism of the electronic device and improving the use reliability of a flexible display screen of the electronic device. The rotating shaft mechanism comprises a main shaft, a first rotating component, and a first shell fixing frame. The first rotating component comprises a first swing arm, a first supporting arm, a first connecting piece, and a first rotating arm. The first swing arm is rotationally connected with the main shaft. The first swing arm is slidingly connected with the first shell fixing frame and can rotate relative to the first shell fixing frame. The first supporting arm is rotationally connected with a second shell fixing frame. The first connecting piece is located between the first swing arm and the first supporting arm and is rotationally connected with the first swing arm and the first supporting arm respectively. The first rotating arm is rotationally connected with the main shaft and slidingly connected with the first shell fixing frame. The base is provided with a first track groove, and the first connecting piece can move along the first track groove.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and in particular to a rotating shaft mechanism and electronic equipment. Background Technology

[0002] With the gradual maturation of flexible display technology, the way electronic devices display technology has undergone tremendous changes. Foldable flexible display mobile phones, foldable flexible display tablets, and wearable electronic devices with foldable flexible displays are a major direction for the evolution of future smart electronic devices.

[0003] As a key component for enabling the folding function of foldable electronic devices, the hinge mechanism can flatten or bend the flexible display screen of the electronic device during unfolding and closing, and prevent the flexible display screen from being stretched or squeezed during the unfolding and closing process. However, the hinge mechanisms currently used in electronic devices are often relatively large in size while achieving the above functions, making it difficult to meet the miniaturization and thinning design requirements of electronic devices. Summary of the Invention

[0004] This application provides a pivot mechanism and an electronic device to reduce the size of the pivot mechanism of the electronic device and improve the reliability of the flexible display screen of the electronic device.

[0005] In a first aspect, this application provides a pivot mechanism applied in a foldable electronic device, which may include a main shaft, a first rotating assembly, a second rotating assembly, a first housing mounting bracket, and a second housing mounting bracket. The main shaft has a first surface for supporting a flexible display screen of the electronic device, and the first housing mounting bracket and the second housing mounting bracket are respectively disposed on both sides of the main shaft. The first rotating assembly may include a first swing arm, a first support arm, a first connector, and a first rotating arm. The first swing arm is rotatably connected to the main shaft and slidably connected to the first housing mounting bracket; the first support arm is rotatably connected to the second housing mounting bracket; the first connector is located between the first swing arm and the first support arm, and is rotatably connected to both the first swing arm and the first rotating arm; the first rotating arm is rotatably connected to the main shaft, the rotation axis of the first rotating arm is parallel to the rotation axis of the first swing arm, and the rotation axis of the first rotating arm is located on the side of the first surface of the main shaft closer to the rotation axis of the first swing arm; the first rotating arm is slidably connected to the first housing mounting bracket. The second rotating assembly may include a second swing arm, a second support arm, a second connector, and a second rotating arm. The second swing arm is rotatably connected to the main shaft and slidably connected to the second housing fixture. The second support arm is rotatably connected to the first housing fixture. The second connector is located between the second swing arm and the second support arm, and is rotatably connected to both the second swing arm and the second rotating arm. The second rotating arm is rotatably connected to the main shaft, and the rotation axis of the second rotating arm is parallel to the rotation axis of the second swing arm. The rotation axis of the second rotating arm is located on the side of the second swing arm's rotation axis closer to the first surface of the main shaft. The second rotating arm is slidably connected to the second housing fixture.

[0006] In this application, during the closing process of the electronic device, the first housing fixing frame and the second housing fixing frame rotate towards each other. The first housing fixing frame drives the first rotating arm and the first swing arm to rotate. The first rotating arm can restrict the rotation angle of the first housing fixing frame by means of its sliding relationship with the first housing fixing frame. The first swing arm can drive the first connecting member to move towards the first swing arm in the first track groove of the main shaft during rotation. Because the first connecting member is rotatably connected to the first support arm, the first connecting member can also drive the first support arm to rotate around the main shaft, thereby driving the second housing fixing frame to rotate through the first support arm. The second housing fixing frame drives the second rotating arm and the second swing arm to rotate. The second rotating arm can restrict the rotation angle of the second housing fixing frame by means of its sliding relationship with the second housing fixing frame. The second swing arm can drive the second connecting member to move towards the second swing arm in the second track groove of the main shaft during rotation. Because the second connecting member is rotatably connected to the second support arm, the second connecting member can also drive the second support arm to rotate around the main shaft, thereby driving the first housing fixing frame to rotate through the second support arm. During the unfolding of the electronic device, the first housing mounting bracket and the second housing mounting bracket rotate in opposite directions. The first housing mounting bracket drives the first rotating arm and the first swing arm to rotate. The first rotating arm can restrict the rotation angle of the first housing mounting bracket by sliding with the first housing mounting bracket. The first swing arm can drive the first connecting member to move towards the first support arm in the first track groove of the main shaft during rotation. Because of the rotational connection between the first connecting member and the first support arm, the first connecting member can also drive the first support arm to rotate around the main shaft, thereby driving the second housing mounting bracket to rotate through the first support arm. The second housing mounting bracket drives the second rotating arm and the second swing arm to rotate. The second rotating arm can restrict the rotation angle of the second housing mounting bracket by sliding with the second housing mounting bracket. The second swing arm can drive the second connecting member to move towards the second support arm in the second track groove of the main shaft during rotation. Because of the rotational connection between the second connecting member and the second support arm, the second connecting member can also drive the second support arm to rotate around the main shaft, thereby driving the first housing mounting bracket to rotate through the second support arm.

[0007] The rotating shaft mechanism of this application can achieve the linkage of each component of the first rotating assembly using a relatively small first rotating component, and can achieve the linkage of each component of the second rotating assembly using a relatively small second rotating component. This allows the main shaft to meet the movement requirements of the first and second rotating components with a smaller thickness and width, thus helping to reduce the size of the rotating shaft mechanism. In addition, since the rotation axes of the first and second rotating arms are closer to the flexible display screen, even with a reduced main shaft width, the overlap between the first rotating arm and the first housing bracket, and the overlap between the second rotating arm and the second housing bracket, remains sufficiently large. This reduces the sway angle of the first and second housing brackets relative to the main shaft, improving the stability of the rotating shaft mechanism.

[0008] Furthermore, since the first and second connecting members can move along a set trajectory, uncontrolled movement of the first and second connecting members during the entire closing and unfolding process can be avoided, thus preventing random movement of the first and second housing fixing frames. Combined with the constraint effect of the first rotating arm on the first housing fixing frame and the constraint effect of the second rotating arm on the second housing fixing frame, the structural and motion stability of the entire rotating mechanism can be effectively improved. In some cases, through reasonable design of the first and second trajectory grooves, the outer tangent of the rotating mechanism can remain constant throughout the folding and unfolding process. This allows the flexible display screen covering the surface of the rotating mechanism to maintain a relatively constant length, effectively preventing compression or stretching of the flexible display screen, thereby improving the structural reliability of the flexible display screen and, consequently, the structural reliability of the electronic device.

[0009] In some implementations, the first rotating arm may have a first hinge axis, through which it is rotatably connected to the main shaft. In this case, the axis of the first hinge axis is the rotation axis of the first rotating arm. This rotatable connection effectively shortens the distance between the rotation axis of the first rotating arm and the flexible display screen. Similarly, the second rotating arm may have a second hinge axis, through which it is rotatably connected to the main shaft. In this case, the axis of the second hinge axis is the rotation axis of the second rotating arm. This rotatable connection effectively shortens the distance between the rotation axis of the second rotating arm and the flexible display screen.

[0010] In some embodiments, a first mounting groove may be provided on the side of the base near the first housing fixing frame. The groove wall of the first mounting groove has a hinge hole. One end of the first rotating arm near the base is located in the first mounting groove, and a first hinge shaft is rotatably disposed in the hinge hole, thereby allowing the first rotating arm to be rotatably connected to the base via the first hinge shaft. A second mounting groove may be provided on the side of the base near the second housing fixing frame. The groove wall of the second mounting groove has a hinge hole. One end of the second rotating arm near the base is located in the second mounting groove, and a second hinge shaft is rotatably disposed in the hinge hole, thereby allowing the second rotating arm to be rotatably connected to the base via the second hinge shaft.

[0011] In some embodiments, the first housing fixture may be provided with a first sliding groove, and a first rotating arm is disposed within the first sliding groove. During the rotation of the first rotating arm around the main shaft, the first rotating arm may slide relative to the first housing fixture in a direction toward or away from the main shaft. The second housing fixture may be provided with a second sliding groove, and a second rotating arm is disposed within the second sliding groove. During the rotation of the second rotating arm around the main shaft, the second rotating arm may slide relative to the second housing fixture in a direction toward or away from the main shaft.

[0012] In some embodiments, a first groove may be provided on the side of the first rotating arm facing the first surface of the spindle, and a first through hole communicating with a first slide groove may be provided on the side of the first housing fixing bracket that is on the same side as the first surface of the spindle. A first limiting member is provided at the first through hole, and the first limiting member has a first protrusion facing the first slide groove. The end of the first protrusion can extend into the first groove, and the first protrusion can slide in the first groove, thereby restricting the sliding of the first rotating arm and reducing the risk of the first rotating arm slipping out of the first slide groove. Similarly, a second groove may be provided on the side of the second rotating arm facing the first surface of the spindle, and a second through hole communicating with a second slide groove may be provided on the side of the second housing fixing bracket that is on the same side as the first surface of the spindle. A second limiting member is provided at the second through hole, and the second limiting member has a second protrusion facing the second slide groove. The end of the second protrusion can extend into the second groove, and the second protrusion can slide in the second groove, thereby restricting the sliding of the second rotating arm and reducing the risk of the second rotating arm slipping out of the second slide groove.

[0013] In some embodiments, the first housing bracket may have a first slot, and the end of the first swing arm away from the main shaft is disposed in the first slot. During the rotation of the first swing arm around the main shaft, the first swing arm can slide relative to the first housing bracket in the first slot in a direction toward or away from the main shaft. The second housing bracket may have a second slot, and the end of the second swing arm away from the main shaft is disposed in the second slot. During the rotation of the second swing arm around the main shaft, the second swing arm can slide relative to the second housing bracket in the second slot in a direction toward or away from the main shaft.

[0014] In some implementations, the first swing arm can oscillate relative to the first housing fixture during its sliding within the first slot, and the oscillation direction of the first swing arm relative to the first housing fixture is opposite to the rotation direction of the first swing arm around the main shaft. This design can reduce the risk of the first swing arm getting stuck in the first slot and improve the motion coordination between the first swing arm and the first housing fixture. Similarly, the second swing arm can oscillate relative to the second housing fixture during its sliding within the second slot, and the oscillation direction of the second swing arm relative to the second housing fixture is opposite to the rotation direction of the second swing arm around the main shaft. This design can reduce the risk of the second swing arm getting stuck in the second slot and improve the motion coordination between the second swing arm and the second housing fixture.

[0015] In some implementations, the groove wall of the first slot may be provided with a first slide rail, and the thickness of the first slide rail at any position may be approximately the same; a first slider may be provided on the side of the first swing arm, and the first slider is assembled in the first slide rail. Along the direction away from the main shaft, the thickness of the first slider gradually increases, and the thickness of the end of the first slider away from the main shaft may be approximately equal to the thickness of the first slide rail. Thus, a certain gap may be generated between the thickness of the end of the first slider close to the main shaft and the wall of the first slide rail. This can reduce the risk of the first slider swaying in the first slide rail and also realize the swing of the first slider in the first slide rail. Similarly, the groove wall of the second slot can be provided with a second slide rail, and the thickness of the second slide rail can be approximately the same at any position; a second slider can be provided on the side of the second swing arm, and the second slider is assembled in the second slide rail. Along the direction away from the main shaft, the thickness of the second slider gradually increases, and the thickness of the end of the second slider away from the main shaft can be approximately equal to the thickness of the second slide rail. Then, a certain gap can be generated between the thickness of the end of the second slider close to the main shaft and the wall of the second slide rail. This can reduce the risk of the second slider swaying in the second slide rail, and also realize the swing of the second slider in the second slide rail.

[0016] In some embodiments, the spindle may include a base, a first fixing member, and a second fixing member. The side of the base facing away from the spindle may have a first arc-shaped groove and a second arc-shaped groove. The first fixing member covers the first arc-shaped groove, and the second fixing member covers the second arc-shaped groove. The side of the first fixing member facing the base may have a first protrusion. The gap between the surface of the first protrusion and the groove surface of the first arc-shaped groove can serve as a first trajectory groove. When the shaft mechanism is in the unfolded and closed states, the surface of the first connecting member can abut against the surface of the first protrusion and the groove surface of the first arc-shaped groove, respectively. This confines the first connecting member within the first trajectory groove, ensuring a relatively stable position for the first connecting member and preventing any play or wobbling, thus giving the shaft mechanism high reliability.

[0017] Similarly, a second protrusion can be provided on the side of the second fixing member facing the base. The gap between the surface of the second protrusion and the groove surface of the second arc-shaped groove can serve as the second trajectory groove. When the rotating shaft mechanism is in the unfolded and closed states, the surface of the second connecting member can abut against the surface of the second protrusion and the groove surface of the second arc-shaped groove, thereby confining the second connecting member in the second trajectory groove. This ensures that the position of the second connecting member is relatively stable and does not produce any play or wobbling, thus giving the rotating shaft mechanism high reliability.

[0018] In some embodiments, the first rotating assembly may further include a first rotating shaft and a second rotating shaft. The first connecting member and the first swing arm can be rotatably connected via the first rotating shaft, and the first connecting member and the first support arm can be rotatably connected via the second rotating shaft, thereby enabling the first swing arm and the first support arm to achieve mutual pulling motion through the first connecting member. The axis of the first rotating shaft is parallel to and does not coincide with the axis of the second rotating shaft. The second rotating assembly may further include a third rotating shaft and a fourth rotating shaft. The second connecting member and the second swing arm can be rotatably connected via the third rotating shaft, and the second connecting member and the second support arm can be rotatably connected via the fourth rotating shaft, thereby enabling the second swing arm and the second support arm to achieve mutual pulling motion through the second connecting member. The axis of the third rotating shaft is parallel to and does not coincide with the axis of the fourth rotating shaft.

[0019] In some implementations, a third arc-shaped groove may be provided on the side of the base facing away from the main shaft. The third arc-shaped groove is adjacent to the first arc-shaped groove, and the depth of the third arc-shaped groove is less than the depth of the fourth arc-shaped groove. The first fixing member may also cover the third arc-shaped groove. A third protrusion may be provided on the side of the first fixing member facing the base. The surface of the third protrusion and the groove surface of the third arc-shaped groove form a third trajectory groove. The portion of the first rotating shaft or the second rotating shaft that extends beyond the first connecting member is accommodated in the third trajectory groove. Thus, the movement trajectory of the first rotating shaft or the second rotating shaft is restricted by the third trajectory groove. In this way, when the rotating shaft mechanism is in the unfolded or closed state, the position of the first rotating shaft or the second rotating shaft is relatively stable. Combined with the constraint effect of the first trajectory groove on the first connecting member, the stability of the first connecting member and the first swing arm and the first support arm that move synchronously with it can be further improved.

[0020] Similarly, a fourth arc-shaped groove can be provided on the side of the base facing away from the main shaft. The fourth arc-shaped groove is adjacent to the second arc-shaped groove, and the depth of the fourth arc-shaped groove is less than the depth of the second arc-shaped groove. The second fixing member can also cover the fourth arc-shaped groove. A fourth protrusion can be provided on the side of the second fixing member facing the base. The surface of the fourth protrusion and the groove surface of the fourth arc-shaped groove form a fourth trajectory groove. The part of the third or fourth rotating shaft that extends beyond the second connecting member is accommodated in the fourth trajectory groove. Thus, the movement trajectory of the third or fourth rotating shaft is restricted by the fourth trajectory groove. In this way, when the rotating shaft mechanism is in the unfolded or closed state, the position of the third or fourth rotating shaft is relatively stable. Combined with the constraint effect of the second trajectory groove on the second connecting member, the stability of the second connecting member and the second swing arm and the second support arm that move synchronously can be further improved.

[0021] In some embodiments, the base may include a base, and the side of the base facing away from the first surface of the main shaft may be provided with a fifth arc-shaped groove and a sixth arc-shaped groove. The first swing arm may include a first arc-shaped rotating block disposed in the fifth arc-shaped groove, and the first arc-shaped rotating block may slide along the groove surface of the fifth arc-shaped groove to rotatably connect the first swing arm to the main shaft. The second swing arm may include a second arc-shaped rotating block disposed in the sixth arc-shaped groove, and the second arc-shaped rotating block may slide along the groove surface of the sixth arc-shaped groove to rotatably connect the second swing arm to the main shaft.

[0022] In some embodiments, the spindle may further include a third fixing member, which covers the fifth arcuate groove and the sixth arcuate groove, and the third fixing member has a fifth protrusion facing the fifth arcuate groove and a sixth protrusion facing the sixth arcuate groove. At least a portion of the first arcuate rotating block is located between the fifth protrusion and the fifth arcuate groove, thereby confining the first arcuate rotating block between the third fixing member and the base, improving the rotational stability of the first arcuate rotating block relative to the spindle. Similarly, at least a portion of the second arcuate rotating block is located between the sixth protrusion and the sixth arcuate rotating groove, thereby confining the second arcuate rotating block between the third fixing member and the base, improving the rotational stability of the second arcuate rotating block relative to the spindle.

[0023] In some implementations, there can be two first arc-shaped rotating blocks, which are spaced apart along the axial direction of the rotating shaft mechanism. Correspondingly, there can also be two fifth arc-shaped grooves, which are also spaced apart along the axial direction of the rotating shaft mechanism. The two first arc-shaped rotating blocks can be respectively housed in the two fifth arc-shaped grooves, and each first arc-shaped rotating block can slide along the groove surface of its corresponding fifth arc-shaped groove. Through the rotational engagement between the two sets of rotating blocks and arc-shaped grooves, the motion stability of the first swing arm relative to the main shaft can be effectively improved.

[0024] Similarly, there can be two second arc-shaped rotating blocks, which can be spaced apart along the axial direction of the rotating shaft mechanism. Correspondingly, there can also be two sixth arc-shaped slots, which can also be spaced apart along the axial direction of the rotating shaft mechanism. The two second arc-shaped rotating blocks can be respectively housed in the two sixth arc-shaped slots, and each second arc-shaped rotating block can slide along the surface of its corresponding sixth arc-shaped slot. Through the rotational engagement between the two sets of rotating blocks and arc-shaped slots, the motion stability of the second swing arm relative to the main shaft can be effectively improved.

[0025] In some implementations, there can be multiple first connecting members, arranged axially along the pivot mechanism, with each first connecting member rotatably connected to both the first swing arm and the first support arm. Along the pivot mechanism's axis, these multiple first connecting members can constrain the mutual pulling motion of the first swing arm and the first support arm at multiple positions, effectively improving the speed uniformity during rotation and thus enhancing the smoothness of their mutual pulling motion. Similarly, there can be multiple second connecting members, arranged axially along the pivot mechanism, with each second connecting member rotatably connected to both the second swing arm and the second support arm. Along the pivot mechanism's axis, these multiple second connecting members can constrain the mutual pulling motion of the second swing arm and the second support arm at multiple positions, effectively improving the speed uniformity during rotation and thus enhancing the smoothness of their mutual pulling motion.

[0026] In some embodiments, the rotating shaft mechanism may further include a synchronization component, which includes a first gear connecting rod and a second gear connecting rod. The first gear connecting rod includes a first gear and a first link, and the second gear connecting rod includes a second gear and a second link. The first and second gears are rotatably connected to the main shaft, and there is a transmission connection between the first and second gears. The first link is slidably connected to the first housing fixing frame, and the second link is slidably connected to the second housing fixing frame. During the opening or closing of the rotating shaft mechanism, the rotation of the first housing fixing frame can drive the first gear connecting rod to rotate around the main shaft. Since the first gear of the first gear connecting rod is transmissionally connected to the second gear of the second gear connecting rod, the rotation of the first gear connecting rod can drive the second gear connecting rod to rotate in the opposite direction, and through the sliding of the second gear connecting rod, it can drive the second housing fixing frame to rotate in the same direction. This achieves synchronous rotation of the first and second housing fixing frames.

[0027] In some embodiments, the first housing fixing frame may be provided with a first limiting wall, which is spaced apart from the first swing arm along the axial direction of the rotating shaft mechanism. The rotating shaft mechanism may also include a first damping assembly, which is disposed between the first swing arm and the first limiting wall. The first damping assembly may include a first cam, a second cam, and a first elastic element. The first cam may be disposed on the side of the first swing arm facing the first limiting wall; the second cam may be disposed on the side of the first cam facing away from the first swing arm, and the second cam is slidably disposed on the first housing fixing frame along the axial direction of the rotating shaft mechanism; the first elastic element may be confined between the second cam and the first limiting wall, thereby applying an elastic force to the second cam, causing the cam surface of the second cam to abut against the cam surface of the first cam. In this way, a damping force can be applied to the first swing arm during the opening or closing of the rotating shaft mechanism, thereby improving the motion stability of the first rotating assembly.

[0028] Similarly, the second housing fixing frame may be provided with a second limiting wall, which is spaced apart from the second swing arm along the axial direction of the rotating shaft mechanism. The rotating shaft mechanism may also include a second damping assembly, which is disposed between the second swing arm and the second limiting wall. The second damping assembly may include a third cam, a fourth cam, and a second elastic element. The third cam may be disposed on the side of the second swing arm facing the second limiting wall; the fourth cam may be disposed on the side of the third cam away from the second swing arm, and the fourth cam is slidably disposed on the second housing fixing frame along the axial direction of the rotating shaft mechanism; the second elastic element may be confined between the fourth cam and the second limiting wall, thereby applying an elastic force to the fourth cam, causing the cam surface of the fourth cam to abut against the cam surface of the third cam. In this way, a damping force can be applied to the second swing arm during the opening or closing of the rotating shaft mechanism, thereby improving the motion stability of the second rotating assembly.

[0029] In some embodiments, the first housing fixing frame may be provided with a first limiting groove arranged axially along the rotating shaft mechanism. The first limiting groove has a first opening facing the first swing arm. The bottom wall of the first limiting groove and the side where the first opening is located can be formed as a first limiting wall. The first elastic member may be disposed in the first limiting groove, and the second cam is at least partially disposed in the first limiting groove. The cam surface of the second cam can abut against the cam surface of the first cam through the first opening. In this way, the movement direction of the second cam driven by the first elastic member can be restricted by the first limiting groove, thereby improving the structural stability and reliability of the first damping assembly. The second housing fixing frame may be provided with a second limiting groove arranged along the axial direction of the rotating shaft mechanism. The second limiting groove has a second opening facing the second swing arm. The bottom wall of the second limiting groove and the side where the second opening is located can be formed as a second limiting wall. The second elastic member may be disposed in the second limiting groove, and the fourth cam is at least partially disposed in the second limiting groove. The cam surface of the fourth cam can abut against the cam surface of the third cam through the second opening. In this way, the movement direction of the fourth cam under the drive of the second elastic member can be restricted by the second limiting groove, thereby improving the structural stability and reliability of the second damping assembly.

[0030] Secondly, this application also provides an electronic device comprising a first housing, a second housing, a flexible display screen, and a rotating mechanism as described in the first aspect. The first and second housings are respectively disposed on opposite sides of the rotating mechanism. A first housing fixing frame is fixedly connected to the first housing, and a second housing fixing frame is fixedly connected to the second housing. The flexible display screen continuously covers the first housing, the second housing, and the rotating mechanism, and is fixedly connected to both the first and second housings. When the electronic device is in its unfolded state, the rotating mechanism, the first housing, and the second housing together provide flat support for the flexible display screen, thereby ensuring the integrity of the electronic device's shape in this unfolded state. During the process of the electronic device moving from the unfolded state to the closed state, the two housings rotate towards each other, causing the flexible display screen to rotate, effectively preventing deformation of the flexible display screen and reducing the risk of damage to the flexible display screen. Attached Figure Description

[0031] Figure 1 A partial exploded view of the electronic device provided in the embodiments of this application in a closed state;

[0032] Figure 2 A partial exploded view of the electronic device provided in the embodiments of this application in its unfolded state;

[0033] Figure 3 This is a schematic diagram of the rotating shaft mechanism provided in the embodiments of this application;

[0034] Figure 4 for Figure 3 An exploded view of a portion of the rotating shaft mechanism shown in the figure;

[0035] Figure 5 A partial structural diagram of the rotating shaft mechanism provided in the embodiment of this application in the unfolded state of the electronic device;

[0036] Figure 6 A schematic diagram of the rotating shaft mechanism provided in the embodiment of this application in the unfolded state of the electronic device;

[0037] Figure 7 A schematic diagram of the rotating shaft mechanism provided in the embodiment of this application in the closed state of the electronic device;

[0038] Figure 8 An exploded view of the spindle provided in an embodiment of this application;

[0039] Figure 9 This is a schematic diagram of the structure of the first connector provided in an embodiment of this application;

[0040] Figure 10 This is a schematic diagram of the structure of the first swing arm provided in an embodiment of this application;

[0041] Figure 11 This is a schematic diagram of the structure of the first support arm provided in an embodiment of this application;

[0042] Figure 12 A schematic cross-sectional view of the rotating shaft mechanism provided in the embodiment of this application in the unfolded state of the electronic device;

[0043] Figure 13 A schematic diagram of another cross-sectional structure of the rotating shaft mechanism provided in the embodiment of this application in the unfolded state of the electronic device;

[0044] Figure 14 A schematic diagram of another cross-sectional structure of the rotating shaft mechanism provided in the embodiment of this application in the closed state of the electronic device;

[0045] Figure 15 A schematic diagram of another cross-sectional structure of the rotating shaft mechanism provided in the embodiment of this application in the unfolded state of the electronic device;

[0046] Figure 16 A schematic diagram of another cross-sectional structure of the rotating shaft mechanism provided in the embodiment of this application in the closed state of the electronic device;

[0047] Figure 17 A schematic diagram of another cross-sectional structure of the rotating shaft mechanism provided in the embodiment of this application in the unfolded state of the electronic device;

[0048] Figure 18 A schematic diagram of another cross-sectional structure of the rotating shaft mechanism provided in the embodiment of this application in the closed state of the electronic device;

[0049] Figure 19 A schematic diagram of another cross-sectional structure of the rotating shaft mechanism provided in the embodiment of this application in the unfolded state of the electronic device;

[0050] Figure 20 A schematic diagram of another cross-sectional structure of the rotating shaft mechanism provided in the embodiment of this application in the closed state of the electronic device;

[0051] Figure 21 An exploded view of another part of the rotating shaft mechanism provided in an embodiment of this application.

[0052] Figure label:

[0053] 1-Rotating shaft mechanism; 1a-Bearing surface of rotating shaft mechanism; 11-Rotating module; 111-First rotating assembly; 1111-First swing arm;

[0054] 11111 - First arc-shaped rotating block; 11112 - First slider; 1112 - First support arm; 11121 - First sub-support arm;

[0055] 1113 - First rotating component; 11131 - First arc surface; 11132 - Second arc surface; 1114 - First rotating shaft;

[0056] 1115 - Second pivot; 1116 - First rotating arm; 11161 - First hinge shaft; 11162 - First groove;

[0057] 112-Second rotating assembly; 1121-Second swing arm; 11211-Second arc-shaped rotating block; 11212-Second slider;

[0058] 1122 - Second support arm; 11221 - First sub-support arm; 1123 - Second connector; 11231 - Third arc surface;

[0059] 11232 - Fourth arc surface; 1124 - Third pivot; 1125 - Fourth pivot; 1126 - Second rotating arm;

[0060] 11261 - Second hinge shaft; 11262 - Second groove;

[0061] 113-First housing fixing frame; 1131-First slot; 11311-First slide rail; 1132-First slide groove;

[0062] 1133-First limiting member; 11331-First protrusion; 1134-Third slide groove; 1135-First limiting arm;

[0063] 1136 - First limiting groove; 1137 - First through hole;

[0064] 114-Second housing fixing bracket; 1141-Second slot; 11411-Second slide rail; 1142-Second slide groove;

[0065] 1143 - Second limiting member; 11431 - Second protrusion; 1144 - Fourth sliding groove; 1147 - Second through hole;

[0066] 12-Main spindle; 12a-First surface; 1201-First track groove; 1202-Second track groove; 1203-Third track groove;

[0067] 121-Base; 1211-First arc-shaped groove; 1212-Second arc-shaped groove; 1213-Third arc-shaped groove; 1214-Fourth arc-shaped groove;

[0068] 1215 - Fifth arc-shaped groove; 1216 - Sixth arc-shaped groove; 1217 - First mounting groove; 1218 - Second mounting groove;

[0069] 122 - First fastener; 1221 - First protrusion; 1223 - Third protrusion; 123 - Second fastener; 124 - Third fastener;

[0070] 1241 - Fifth protrusion; 125 - Fourth fastener;

[0071] 13-Synchronization component; 131-First gear connecting rod; 1311-First gear; 1312-First connecting rod; 132-Second gear connecting rod;

[0072] 1321 - Second gear; 1322 - Second connecting rod;

[0073] 141-First damping assembly; 1411-First cam; 14111-First cam surface; 1412-Second cam;

[0074] 14121 - Second cam surface; 1413 - First elastic element; 14131 - Spring; 14132 - First guide post;

[0075] 142 - Second damping component;

[0076] 2-First shell; 2a-Bearing surface of the first shell;

[0077] 3-Second shell; 3a-Bearing surface of the second shell;

[0078] 4- Flexible display screen. Detailed Implementation

[0079] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. The same reference numerals in the figures denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The terms expressing position and direction described in the embodiments of this application are illustrative based on the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this application. The accompanying drawings of the embodiments of this application are only for illustrating relative positional relationships and do not represent actual scale.

[0080] It should be noted that specific details are set forth in the following description to facilitate understanding of this application. However, the embodiments of this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the embodiments of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0081] refer to Figure 1 As shown, Figure 1This is a partially exploded view of the electronic device provided in this application embodiment in a closed state. The electronic device provided in this application embodiment can be a mobile phone, a personal digital assistant (PDA), a laptop computer, a tablet computer, or other devices with foldable functionality. Figure 1 The electronic device illustrated in this embodiment is a mobile phone. The electronic device may include a hinge mechanism 1, a flexible display screen 4, and two housings. For ease of description, the two housings may be named first housing 2 and second housing 3, respectively. First housing 2 and second housing 3 are located on opposite sides of the hinge mechanism 1 and can rotate around the hinge mechanism 1. During use, this electronic device can be closed and opened according to different usage scenarios.

[0082] According to the embodiments of this application, the electronic device can be an outward-folding electronic device. In the outward-folding electronic device, the flexible display screen 4 is always located on the outside of the electronic device, whether in the closed state or during the switching between the closed and unfolded states. Figure 1 This demonstrates the relative positional relationship between the rotating shaft mechanism 1 and the two housings when the electronic device is in a closed state.

[0083] Figure 2 A partial exploded view of the electronic device provided in the embodiments of this application in its unfolded state. See also... Figure 1 and Figure 2 The rotating shaft mechanism 1, the first housing 2, and the second housing 3 each have a support surface facing the flexible display screen 4. The flexible display screen 4 can continuously cover the bearing surface 1a of the rotating shaft mechanism 1, the support surface 2a of the first housing 2, and the support surface 3a of the second housing 3. The rotating shaft mechanism 1 and the bendable part of the flexible display screen 4 are correspondingly arranged, and the flexible display screen 4 can be fixedly connected to the support surface 2a of the first housing 2 and the support surface 3a of the second housing 3. The connection method can be, but is not limited to, adhesive bonding. When the electronic device is in the unfolded state, the support surface 1a of the rotating shaft mechanism 1, the support surface 2a of the first housing 2, and the support surface 3a of the second housing 3 can be connected to form a flat support surface. In this way, the rotating shaft mechanism 1, the first housing 2, and the second housing 3 can provide flat support for the flexible display screen 4.

[0084] In this embodiment of the application, the first housing 2 and the second housing 3 are composed of Figure 1 The closed state shown Figure 2 During the opposite rotation process of the unfolded state shown, or by Figure 2 The unfolded state shown Figure 1 During the relative rotation in the closed state shown, the flexible display screen 4 can be bent or flattened along with the first housing 2 and the second housing 3. Furthermore, it can be understood that the electronic device is composed of… Figure 2 The unfolded state shown Figure 1The closed state shown, or by Figure 1 The closed state shown Figure 2 The unfolded state shown is the process of the first housing 2 and the second housing 3 rotating around the pivot mechanism 1. The pivot mechanism 1, as a key functional component in the foldable electronic device, is designed to correspond to the bendable portion of the flexible display screen 4; therefore, it plays a crucial role in... Figure 2 The unfolded state shown and in Figure 1 In the closed state shown, it plays an important role in supporting the foldable part of the flexible display screen 4.

[0085] refer to Figure 3 As shown, the rotating shaft mechanism 1 may include a rotating module 11 and a main shaft 12, wherein the main shaft 12 extends along the axial direction of the rotating shaft mechanism 1 and serves as a load-bearing component of the rotating module 11. Additionally, the main shaft 12 has a first surface 12a facing the flexible display screen, which may be formed as part of the load-bearing surface of the rotating shaft mechanism 1. In this application, the axial direction of the rotating shaft mechanism 1 can be understood as the direction of extension of the axis of rotation of the first housing 2 and the second housing 3 about the rotating shaft mechanism 1. The number of rotating modules 11 can be one or more. When the rotating shaft mechanism 1 includes multiple rotating modules 11, the multiple rotating modules 11 can be arranged at intervals along the axial direction of the rotating shaft mechanism 1. The first housing 2 and the second housing 3 are rotatably connected by multiple rotating modules 11, which can effectively improve the stability of the rotation of the first housing 2 and the second housing 3 of the electronic device relative to the rotating shaft mechanism 1.

[0086] In one embodiment, when there are multiple rotating modules 11, each of the multiple rotating modules 11 can use a main shaft 12 as a load-bearing component to improve the integration of the rotating shaft mechanism 1. In another embodiment, the rotating shaft mechanism 1 can be provided with a main shaft 12 for each rotating module 11, so that each rotating module 11 uses the corresponding main shaft 12 as a load-bearing component.

[0087] Figure 4 for Figure 3 An exploded view of a portion of the rotating shaft mechanism 1 shown. (Reference) Figure 4 As shown in the embodiment of this application, the rotating module 11 may include a first rotating component 111 and a second rotating component 112. The first rotating component 111 and the second rotating component 112 are distributed along the axial direction of the rotating shaft mechanism, and the first rotating component 111 and the second rotating component 112 are respectively rotatable relative to the main shaft 12. In addition, in each rotating module 11, there may be one or more first rotating components 111 and second rotating components 112, and the number of the two may be equal or unequal. When there are multiple first rotating components 111 or second rotating components 112, the first rotating components 111 and the second rotating components 112 may be arranged alternately along the axial direction of the rotating shaft mechanism 1.

[0088] Additionally, the rotating shaft mechanism 1 may also include a first housing fixing frame 113 and a second housing fixing frame 114, which are respectively disposed on opposite sides of the main shaft 12. The first housing fixing frame 113 can be fixedly connected to the first housing 2, and the second housing fixing frame 114 can be fixedly connected to the second housing 3. Furthermore, the first housing fixing frame 113 can also be drivenly connected to the first rotating assembly 111, thereby enabling the first housing fixing frame 113 and the first housing 2 to rotate relative to the main shaft 12; and the second housing 3 can also be drivenly connected to the second rotating assembly 112, thereby enabling the second housing fixing frame 114 and the second housing 3 to rotate relative to the main shaft 12. When the electronic device is unfolded or closed, the first housing fixing frame 113 rotates synchronously with the first housing 2, and the second housing fixing frame 114 rotates synchronously with the second housing 3. Subsequently, the first housing fixing frame 113 drives the first rotating assembly 111 to rotate around the main shaft, and the second housing fixing frame 114 drives the second rotating assembly 112 to rotate around the main shaft 12. In this way, by rationally designing the structure of the first rotating component 111 and the second rotating component 112, the movement trajectory of the first housing 2 and the second housing 3 can be restricted, so that the first housing 2 and the second housing 3 can realize the opening and closing of the electronic device in a set rotation mode.

[0089] Figure 5 This is a partial structural diagram of the pivot mechanism 1 provided in the embodiments of this application in the unfolded state of the electronic device. (See also...) Figure 4 and Figure 5 As shown in this embodiment, the first rotating assembly 111 may include a first swing arm 1111, a first support arm 1112, and a first connecting member 1113. The first swing arm 1111 and the first support arm 1112 are respectively disposed on opposite sides of the main shaft 12. The first swing arm 1111 is slidably connected to the first housing fixing frame 113, and the first support arm 1112 is rotatably connected to the second housing fixing frame 114. The first connecting member 1113 is located between the first swing arm 1111 and the first support arm 1112. The first connecting member 1113 is rotatably connected to the first swing arm 1111 and the first support arm 1112, thereby enabling mutual pulling motion between the first housing fixing frame 113 and the second housing fixing frame 114.

[0090] Figure 6 This is a schematic diagram of the rotating shaft mechanism 1 provided in the embodiments of this application in the unfolded state of the electronic device. Figure 7 This is a schematic diagram of the rotating shaft mechanism 1 provided in the embodiments of this application in the closed state of the electronic device. (See also...) Figure 6 and Figure 7As shown, the main shaft 12 may be provided with a first track groove 1201, and the first connecting member 1113 may move along the first track groove 1201, thereby using the first track groove 1201 to restrict the movement trajectory of the first connecting member 1113. During the process of the electronic device switching from the unfolded state to the closed state, the first connecting member 1113 may move in the first track groove 1201 toward the side where the first housing fixing frame 113 is located. Conversely, during the process of the electronic device switching from the closed state to the unfolded state, the first connecting member 1113 may move in the first track groove 1201 toward the side where the second housing fixing frame 114 is located.

[0091] Figure 8 An exploded view of the spindle 12 provided in an embodiment of this application. (See reference...) Figure 8 As shown, the main shaft 12 may include a base 121 and a first fixing member 122. One side surface of the base 121 can serve as the first surface of the main shaft 12 for supporting the flexible display screen, while the side of the base 121 facing away from the first surface of the main shaft may be provided with a first arc-shaped groove 1211. The first fixing member 122 can be disposed on top of the first arc-shaped groove 1211. For example, the first fixing member 122 can be fixed to the base 121 by means of screw connection or adhesive bonding. The first fixing member 122 has a first protrusion 1221 facing the first arc-shaped groove 1211. There is a gap between the surface of the first protrusion 1221 and the groove surface of the first arc-shaped groove 1211, which can serve as a first track groove.

[0092] Combination Figures 6 to 8 As shown, during the unfolding and closing processes of the electronic device, the first swing arm 1111 and the first support arm 1112 can rotate around the main shaft 12. Furthermore, because the first swing arm 1111 and the first support arm 1112 perform mutual pulling motion through the first connector 1113, the first connector 1113 can also rotate relative to the surface of the first protrusion 1221 and the groove surface of the first arc-shaped groove 1211 during its movement within the first track groove 1201, thereby improving the smoothness of the movement of the first rotating assembly.

[0093] Figure 9 This is a schematic diagram of the structure of the first connector 1113 provided in an embodiment of this application. (See reference...) Figure 9 As shown in the embodiment of this application, the first connector 1113 is generally a strip structure, and the widths of the two ends of the first connector 1113 may be unequal to reduce the risk of the first connector getting stuck in the first track groove. For example, the two ends of the first connector 1113 respectively have a first arc surface 11131 and a second arc surface 11132, and the diameter of the first arc surface 11131 is smaller than the diameter of the second arc surface 11132.

[0094] Please refer to the above. Figure 7 and Figure 9As shown, in one embodiment, the end of the first connector 1113 near the first arc surface 11131 is rotatably connected to the first swing arm 1111, and the end of the first connector 1113 near the second arc surface 11132 is rotatably connected to the first support arm 1112.

[0095] Alternatively, in another embodiment, the end of the first connector 1113 near the first arc surface 11131 is rotatably connected to the first support arm 1112, and the end of the first connector 1113 near the second arc surface 11132 is rotatably connected to the first swing arm 1111.

[0096] As can be seen from the above description, the end where the second arc surface 11132 is located is the widest part of the first connector 1113. Therefore, the first track groove 1201 can be designed according to the size of the second arc surface 11132, or the second arc surface 11132 can be designed according to the size of the first track groove 1201, so that the first connector 1113 and the first track groove 1201 can be adapted to each other.

[0097] Please combine Figure 6 , Figure 7 and Figure 9 When electronic devices are in Figure 6 The closed state shown and Figure 7 In the unfolded state shown, the second arc surface 11132 of the first connector 1113 abuts against the surface of the first protrusion 1221 and the groove surface of the first arc groove 1211, thereby confining the first connector 1113 in the first track groove 1201. In this way, the position of the first connector 1113 is relatively stable when the electronic device is in the unfolded and closed states, and no misalignment or wobbling will occur, so that the rotating shaft mechanism has high reliability.

[0098] In some embodiments, the surface of the first protrusion 1221 can be an arc surface, and the groove surface of the first arc groove 1211 can also be an arc surface, and the center of the surface of the first protrusion 1221 coincides with the center of the surface of the first arc groove 1211.

[0099] In some other embodiments, the surfaces of the first protrusion 1221 and the first arc-shaped groove 1211 can both be planar, in which case the first trajectory groove 1201 is a straight groove. Alternatively, the surfaces of the first protrusion 1221 and the first arc-shaped groove 1211 can also be curved surfaces of other shapes, in which case the formed first trajectory groove 1201 is a curved groove of the corresponding shape.

[0100] In some embodiments of this application, the distance between the surface of the first protrusion 1221 and the groove surface of the first arcuate groove 1211 can be equal at all points, so that the first trajectory groove 1201 is formed as a groove of equal width. During the process of the electronic device moving from the unfolded state to the closed state, and from the closed state to the unfolded state, the surface of the first protrusion 1221 and the second arcuate surface 11132 of the first connector 1113, and the groove surface of the first arcuate groove 1211 and the second arcuate surface 11132 of the first connector 1113 are always in contact. In this way, during the unfolding and closing of the electronic device, the movement trajectory of the first connector 1113 can remain the same, which helps to improve the movement stability of the first connector 1113, and thus improves the movement stability of the first rotating assembly.

[0101] It is understandable that, when the first track groove 1201 is a groove of equal width, the distance between the surface of the first protrusion 1221 and the groove surface of the first arc-shaped groove 1211 is approximately equal to the diameter of the second arc surface 11132. Furthermore, considering the smooth movement of the first connector 1113 within the first track groove 1201, a certain design gap can be maintained between the second arc surface 11132 and the surface of the first protrusion 1221 and / or the groove surface of the first arc-shaped groove 1211.

[0102] Of course, in other embodiments of this application, the movement trajectory of the first connector 1113 during the unfolding and closing of the electronic device can also be different. In a specific implementation, during the process of the electronic device moving from the unfolded state to the closed state, the second arc surface 11132 abuts against the surface of the first protrusion 1221, and there is a gap between the second arc surface 11132 and the groove surface of the first arc groove 1211. During the process of the electronic device moving from the closed state to the closed state, the second arc surface 11132 abuts against the groove surface of the first arc groove 1211, and there is a gap between the second arc surface 11132 and the surface of the first protrusion 1221. In this embodiment, the distance between the surface of the first protrusion 1221 and the groove surface of the first arc groove 1211 at various points can be unequal, and the first trajectory groove 1201 is a non-uniform width groove.

[0103] Continue to refer to Figure 6 , Figure 7 and Figure 9As shown, the first rotating assembly also includes a first rotating shaft 1114 and a second rotating shaft 1115. The axis of the first rotating shaft 1114 is parallel to and does not coincide with the axis of the second rotating shaft 1115. The first connecting member 1113 is rotatably connected to the first swing arm 1111 via the first rotating shaft 1114, and the first connecting member 1113 is rotatably connected to the first support arm 1112 via the second rotating shaft 1115, thereby enabling the first swing arm 1111 and the first support arm 1112 to achieve mutual pulling motion through the first connecting member 1113. In one implementation, when the end of the first connecting member 1113 near the first arc surface 11131 is rotatably connected to the first swing arm 1111, the first rotating shaft 1114 and the first connecting member 1113 can be an integral structure. In this case, a portion of the surface of the first rotating shaft 1114 can be formed as the first arc surface 11131. This design helps to reduce the size of the first connecting member 1113, thereby reducing its space occupation within the rotating shaft mechanism. The first connector 1113 may have a hinge hole at one end near the second arc surface 11132, and the second rotating shaft 1115 passes through the hinge hole.

[0104] In this embodiment, the number of first connecting members 1113 can be multiple, and the multiple first connecting members 1113 are distributed along the axial direction of the rotating shaft mechanism. Figure 8 Taking the two first connecting members 1113 shown as an example, the two first connecting members 1113 are rotatably connected to the first swing arm 1111 via the first rotating shaft 1114, and rotatably connected to the first support arm 1112 via the second rotating shaft 1115. Along the axial direction of the rotating shaft mechanism, the multiple first connecting members 1113 can constrain the mutual pulling motion of the first swing arm 1111 and the first support arm 1112 at multiple positions, thereby effectively improving the speed uniformity of the first swing arm 1111 and the first support arm 1112 during rotation, and thus improving the smoothness of the mutual pulling motion of the first swing arm 1111 and the first support arm 1112.

[0105] In one implementation, the first connecting member 1113 and the first rotating shaft 1114 are arranged in a one-to-one correspondence. For example, when there are two first connecting members 1113, the first rotating shaft 1114 can be located on the side of the corresponding first connecting member 1113 facing away from the other first connecting member 1113. The two first connecting members 1113 can be rotatably connected to the first support arm 1112 through a second rotating shaft 1115. In this case, the second rotating shaft 1115 can be respectively inserted into the hinge holes of the two first connecting members 1113, so that the two first connecting members 1113 can be connected into one unit by using the second rotating shaft 1115. This can not only ensure the synchronous movement of the two first connecting members 1113, but also reduce the installation difficulty of the first connecting members 1113 in the rotating shaft mechanism.

[0106] Please refer to the above. Figures 7 to 9In this embodiment, a third arc-shaped groove 1213 may be provided on the side of the base 121 facing away from the first surface of the main shaft 12. The third arc-shaped groove 1213 is adjacent to the first arc-shaped groove 1211, and the depth of the third arc-shaped groove 1213 may be less than the depth of the first arc-shaped groove 1211. The first fixing member 122 may be simultaneously covered above the first arc-shaped groove 1211 and the third arc-shaped groove 1213. A third protrusion 1223 may also be provided on the side of the first fixing member 122 facing the base 121. The third protrusion 1223 is positioned opposite to the third arc-shaped groove 1213. At this time, the gap between the surface of the third protrusion 1223 and the groove surface of the third arc-shaped groove 1213 may be formed as a third trajectory groove 1203.

[0107] In some embodiments, the portion of the first rotating shaft 1114 extending beyond the first connecting member 1113 may be accommodated within the third track groove 1203, thereby limiting the movement trajectory of the first rotating shaft 1114. In other embodiments, the portion of the second rotating shaft 1115 extending beyond the first connecting member may be accommodated within the third track groove 1203, in which case the third track groove 1203 serves to limit the movement trajectory of the second rotating shaft 1115.

[0108] Taking the cooperation of the second rotating shaft 1115 and the third track groove 1203 as an example, in a specific implementation, the portion of the second rotating shaft 1115 located between the two first connecting members 1113 can be accommodated within the third track groove 1203. When the electronic device is in such a state... Figure 6 The closed state shown and as Figure 7 In the unfolded state, the surface of the second rotating shaft 1115 abuts against the surface of the third protrusion 1223 and the groove surface of the third arc-shaped groove 1213, thereby confining the second rotating shaft 1115 within the third track groove 1203. Thus, the position of the second rotating shaft 1115 is relatively stable when the electronic device is in the unfolded and closed states. Combined with the constraint effect of the first track groove 1201 on the first connecting member 1113, the solution of this application embodiment can effectively improve the stability of the first connecting member 1113 and the first swing arm 1111 and the first support arm 1112 that move synchronously with it, thereby further improving the reliability of the rotating shaft mechanism 1.

[0109] Similar to the first track groove 1201, in the specific design of the third track groove 1203, the surface of the third protrusion 1223 can be an arc surface, and the groove surface of the third arc groove 1213 can also be an arc surface, with the center of the surface of the third protrusion 1223 coinciding with the center of the groove surface of the third arc groove 1213. It is worth mentioning that when both the surface of the third protrusion 1223 and the surface of the first protrusion 1221 are arc surfaces, the surface of the third protrusion 1223 and the surface of the first protrusion 1221 can be arc surfaces of the same arc, that is, the side of the first fixing member 122 facing the base 121 is a complete arc surface.

[0110] Furthermore, the distance between the surface of the third protrusion 1223 and the groove surface of the third arc-shaped groove 1213 can be equal at all points, so that the third trajectory groove 1203 is formed as a groove of equal width. During the process of the electronic device moving from the unfolded state to the closed state, and from the closed state to the unfolded state, the surface of the third protrusion 1223 and the surface of the second rotating shaft 1115, and the groove surface of the third arc-shaped groove 1213 and the surface of the second rotating shaft 1115 are always in contact. In this way, during the unfolding and closing of the electronic device, the movement trajectory of the second rotating shaft 1115 remains the same, thereby improving the movement stability of the first rotating component.

[0111] It is understandable that, when the third track groove 1203 is a groove of equal width, the distance between the surface of the third protrusion 1223 and the groove surface of the third arc-shaped groove 1213 is approximately equal to the diameter of the second rotating shaft 1115. Considering the smoothness of the movement of the second rotating shaft 1115 within the third track groove 1203, a certain design gap can be maintained between the surface of the second rotating shaft 1115 and the surface of the third protrusion 1223 and / or the groove surface of the third arc-shaped groove 1213.

[0112] Figure 10 A schematic diagram of the structure of the first swing arm 1111 provided in an embodiment of this application. See also... Figure 4 and Figure 10 As shown, a first arc-shaped rotating block 11111 can be provided on the side of the first swing arm 1111 near the base 121. Correspondingly, the base 121 can be provided with a fifth arc-shaped groove 1215. The first arc-shaped block 11111 of the first swing arm 1111 can be accommodated in the fifth arc-shaped groove 1215 and can rotate along the arc surface of the fifth arc-shaped groove 1215, thereby realizing the rotation of the first swing arm 1111 around the main shaft 12. In this embodiment, the rotation axis of the first swing arm 1111 is arranged along the axial direction of the rotating shaft mechanism 1. The first arc-shaped rotating block 11111 can be a circular arc-shaped rotating block, and the fifth arc-shaped groove 1215 can be a circular arc-shaped groove. In this case, the surface of the first arc-shaped rotating block 11111 that contacts the groove surface of the fifth arc-shaped groove 1215 is a circular arc surface, and the groove surface of the fifth arc-shaped groove 1215 is also a circular arc surface. The circles of the two circular arc surfaces coincide.

[0113] The aforementioned method of using an arc-shaped groove and an arc-shaped rotating block to achieve rotation around a virtual axis can be called a virtual axis rotational connection. That is, the two rotating entities do not directly rotate relative to each other via a physical pin, but rather achieve a rotational connection through the aforementioned mating structure. This connection method helps reduce the size of the main shaft 12, facilitating the miniaturization of the rotating shaft mechanism 1. It is easy to understand that, for outward-folding electronic devices, when the first swing arm 1111 is rotatably connected to the main shaft 12 via a virtual axis, the axis of rotation of the first swing arm 1111 around the main shaft 12 is located on the side of the main shaft 12 away from the flexible display screen.

[0114] Please refer to the above. Figure 8 and Figure 10 As shown, the main shaft 12 may further include a third fixing member 124, which may cover the fifth arc-shaped groove 1215 and has a fifth protrusion 1241 facing the fifth arc-shaped groove 1215. At least a portion of the first arc-shaped rotating block 11111 is located between the fifth protrusion 1241 and the fifth arc-shaped groove 1215, and the first arc-shaped rotating block 11111 may contact the surface of the fifth protrusion 1241, thereby limiting the first arc-shaped rotating block 11111 between the third fixing member 124 and the base 121 to improve the rotational stability of the first arc-shaped rotating block 11111 relative to the main shaft 12.

[0115] It is worth mentioning that when the groove surface of the fifth arc-shaped groove 1215 is an arc surface, the part of the surface of the fifth protrusion 1241 that is in contact with the first arc-shaped rotating block 11111 can also be an arc surface, and the centers of the two arc surfaces coincide. In addition, the surface of the first arc-shaped rotating block 11111 facing the fifth protrusion 1241 can be either a plane or an arc surface, as long as the first arc-shaped rotating block 11111 can rotate relative to the fifth protrusion 1241.

[0116] In one specific embodiment, there can be two first arc-shaped rotating blocks 11111, which are spaced apart along the axial direction of the rotating shaft mechanism. Correspondingly, there can also be two fifth arc-shaped grooves 1215, which are also spaced apart along the axial direction of the rotating shaft mechanism. The two first arc-shaped rotating blocks 11111 can be respectively housed in the two fifth arc-shaped grooves 1215, and each first arc-shaped rotating block 11111 can slide along the groove surface of the corresponding fifth arc-shaped groove 1215. Through the rotational engagement between the two sets of rotating blocks and arc-shaped grooves, the motion stability of the first swing arm 1111 relative to the main shaft 12 can be effectively improved.

[0117] Please refer to the above. Figure 9 and Figure 10As shown in this embodiment, the side of the first connecting member 1113 near the first swing arm 1111 can be located between the two first arc-shaped rotating blocks 11111 to improve the structural compactness of the first rotating assembly. In this case, the two first arc-shaped rotating blocks 11111 are each provided with a hinge hole a1. One end of the first rotating shaft 1114 is fixedly connected to the first connecting member 1113, and the other end is rotatably disposed within the hinge hole a1. Thus, during the rotation of the first swing arm 1111 around the main shaft, the first connecting member 1113 is pulled to move within the first track groove, achieving a rotational connection between the first swing arm 1111 and the first connecting member 1113.

[0118] Figure 11 A schematic diagram of the structure of the first support arm provided in an embodiment of this application. (See also...) Figure 9 and Figure 11 As shown in this embodiment, the first support arm 1112 is provided with a hinge hole b1. The second rotating shaft 1115 can pass through the hinge holes of both the first support arm 1112 and the first connecting member 1113, thereby rotatably connecting the first support arm 1112 and the first connecting member 1113. Alternatively, the first support arm 1112 may include two first sub-support arms 11121, which are spaced apart along the axial direction of the rotating shaft mechanism. In this case, the side of the first connecting member 1113 closest to the first support arm 1112 can be located between the two first sub-support arms 11121, further improving the structural compactness of the first rotating assembly. Each of the two first sub-support arms 11121 is provided with a hinge hole b. The two ends of the second rotating shaft 1115 extending beyond the first connecting member 1113 are rotatably disposed within the hinge holes of the two first sub-support arms 11121, thereby improving the smoothness of the relative movement between the first connecting member 1113 and the first support arm 1112.

[0119] Please refer to the above. Figure 4 and Figure 11 The first support arm 1112 is rotatably connected to the second housing fixing frame 114 at one end near the second housing fixing frame 114. In one specific implementation, the first support arm 1112 is provided with a hinge hole c1 at one end near the second housing fixing frame 114, and correspondingly, the second housing fixing frame 114 is provided with a hinge hole d1. The first support arm 1112 and the second housing fixing frame 114 can be rotatably connected by a rotating shaft passing through the hinge hole c1 and the hinge hole d1.

[0120] Figure 12 This is a schematic cross-sectional view of the rotating shaft mechanism 1 provided in the embodiments of this application in the unfolded state of the electronic device. (See also...) Figure 4 and Figure 12As shown, the first housing mounting bracket 113 is provided with a first slot 1131, which extends along a first direction. The end of the first swing arm 1111 away from the main shaft 12 can be disposed within the first slot 1131. During the rotation of the first swing arm 1111 around the main shaft 12, the first swing arm 1111 can slide within the first slot 1131 along the first direction. Furthermore, during the sliding process, the first swing arm 1111 can also swing slightly relative to the first housing mounting bracket 113, thereby reducing the risk of the first swing arm 1111 getting stuck in the first slot 1131 and improving the motion coordination between the first swing arm 1111 and the first housing mounting bracket 113. The first direction refers to the direction in which the first housing mounting bracket 113 approaches or moves away from the main shaft 12. It is easy to understand that the swing direction of the first swing arm 1111 relative to the first housing mounting bracket 113 is opposite to the rotation direction of the first swing arm 1111 relative to the main shaft 12.

[0121] To prevent the first swing arm 1111 from falling out of the first slot 1131, a first slide rail 11311 is provided on the wall of the first slot 1131. Correspondingly, a first slider 11112 can be provided on the side of the first swing arm 1111. The first slider 11112 is assembled in the first slide rail 11311. In this way, the first swing arm 1111 can be limited in the first slot 1131, and the first slide rail 11311 can be used to guide the movement of the first swing arm 1111 in the first slot 1131, so as to improve the movement stability of the first swing arm 1111.

[0122] Furthermore, along the first direction, the thickness of the first slide rail 11311 at various locations can remain approximately the same, and the first slider 11112 can have a gradually varying thickness. Specifically, along the direction away from the main shaft 12, the thickness of the first slider 11112 gradually increases, and the thickness of the end of the first slider 11112 away from the main shaft 12 is approximately equal to the thickness of the first slide rail 11311. Therefore, the thickness of the end of the first slider 11112 near the main shaft 12 is obviously less than the thickness of the first slide rail 11311. Thus, after the first slider 11112 is assembled into the first slide rail 11311, the end of the first slider 11112 away from the main shaft 12 can abut against the wall of the first slide rail 11311. A certain gap can be generated between the end of the first slider 11112 near the main shaft 12 and the wall of the first slide rail 11311. This can reduce the risk of the first slider 11112 swaying in the first slide rail 11311, and also enable the first slider 11112 to swing in the first slide rail 11311. That is, while realizing the rotation of the first swing arm 1111 relative to the first housing fixing frame 113, the risk of the first swing arm 1111 swaying is reduced, thereby further improving the motion stability of the first swing arm 1111.

[0123] Figure 13This is a schematic diagram of another cross-sectional structure of the rotating shaft mechanism 1 provided in the embodiments of this application in the unfolded state of the electronic device. Figure 14 This is a schematic cross-sectional view of the rotating shaft mechanism 1 provided in the embodiments of this application in the closed state of the electronic device. See also... Figure 4 , Figure 13 and Figure 14 As shown in the embodiment of this application, in addition to the above-described structure, the first rotating assembly 111 may further include a first rotating arm 1116, which is rotatably connected to the main shaft 12. The rotation axis of the first rotating arm 1116 is parallel to the rotation axis of the first swing arm 1111, and the rotation axis of the first rotating arm 1116 is located on the side of the rotation axis of the first swing arm 1111 closer to the first surface of the main shaft 12. Alternatively, it can be understood that the rotation axis of the first rotating arm 1116 is closer to the flexible display screen than the rotation axis of the first swing arm 1111. Furthermore, the first rotating arm 1116 is slidably connected to the first housing fixing frame 113, and there is only relative sliding between the first rotating arm 1116 and the first housing fixing frame 113. In this case, the rotation angle of the first housing fixing frame 113 is controlled by the first rotating arm 1116. As the distance between the rotation axis of the first rotating arm 1116 and the flexible display screen is reduced, the overlap between the first rotating arm 1116 and the first housing fixing frame 113 along the first direction will also increase, thereby effectively increasing the stability of the first housing fixing frame 113 relative to the main shaft movement.

[0124] In this embodiment, the first rotating arm 1116 has a first hinge shaft 11161 at one end near the base 121, and the first rotating arm 1116 can be rotatably connected to the base 121 through the first hinge shaft 11161. In this case, the axis of the first hinge shaft 11161 is the rotation axis of the first rotating arm 1116. This method of rotatably connecting via a solid shaft can effectively shorten the distance between the rotation axis of the first rotating arm 1116 and the flexible display screen. A first mounting groove 1217 can be provided on the side of the base 121 near the first housing fixing frame 113. The groove wall of the first mounting groove 1217 is provided with a hinge hole. The end of the first rotating arm 1116 near the base 121 is located within the first mounting groove 1217, and the first hinge shaft 11161 is rotatably disposed in the hinge hole. Thus, the first rotating arm 1116 can be rotatably connected to the base 121 through the first hinge shaft 11161.

[0125] Continue to refer to Figure 4 , Figure 13 and Figure 14The first housing fixing frame 113 may be provided with a first slide groove 1132, which extends along a first direction. One end of the first rotating arm 1116 near the first housing fixing frame 113 is slidably disposed within the first slide groove 1132. Similarly, the groove wall of the first slide groove 1132 may be provided with a third slide rail, and the end of the first rotating arm 1116 along the axial direction of the rotating shaft mechanism 1 may be located within the third slide rail, thereby limiting the first rotating arm 1116 and providing guidance for the sliding of the first rotating arm 1116. For example, the height of the third slide rail may be approximately equal to the thickness of the first rotating arm 1116 to reduce the risk of the first rotating arm 1116 swaying or rotating within the first slide groove 1132 and improve the sliding stability of the first rotating arm 1116 relative to the first housing fixing frame 113.

[0126] In one implementation, a first groove 11162 may be provided on the side of the first rotating arm 1116 facing the flexible display screen. The first housing bracket 113 includes a first limiting member 1133, which may be provided on the side of the first housing bracket 113 facing the flexible display screen, and the first limiting member 1133 has a first protrusion 11331 facing away from the flexible display screen. The side of the first housing bracket 113 facing the flexible display screen has a first through hole 1137 communicating with the first slide groove 1132. The first protrusion 11331 can enter the first slide groove 1132 through the first through hole 1137 and further extend into the first groove 11162 of the first rotating arm 1116. In this way, the sliding of the first rotating arm 1116 can be restricted by the first protrusion 11331, reducing the risk of the first rotating arm 1116 slipping out of the first slide groove 1132 and improving the movement reliability of the first rotating arm 1116. In addition, a certain gap can be maintained between the end of the first protrusion 11331 and the bottom of the first groove 11162 to avoid friction between the first protrusion 11331 and the bottom of the first groove 11162, which would affect the smoothness of the sliding of the first rotating arm 1116.

[0127] Figure 15 This is a schematic diagram of another cross-sectional structure of the rotating shaft mechanism 1 provided in the embodiments of this application in the unfolded state of the electronic device. Figure 16 This is a schematic cross-sectional view of the rotating shaft mechanism 1 provided in the embodiments of this application in the closed state of the electronic device. See also... Figures 13 to 16As shown, based on the rotating shaft mechanism 1 provided in the above embodiments of this application, during the process of the electronic device changing from an unfolded state to a closed state, the first housing fixing frame 113 and the second housing fixing frame 114 move towards each other. The first housing fixing frame 113 drives the first rotating arm 1116 and the first swing arm 1111 to rotate counterclockwise. During this process, the first rotating arm 1116 rotates around the first hinge axis and restricts the rotation angle of the first housing fixing frame 113 by utilizing the sliding connection relationship with the first housing fixing frame 113. The first swing arm 1111 slides along the groove surface of the fifth arc-shaped groove and drives the first connecting member 1113 to move toward the first swing arm 1111 in the first trajectory groove 1201 of the main shaft 12. Since the first connecting member 1113 is rotatably connected to the first support arm 1112, the first connecting member 1113 can drive the first support arm 1112 to rotate clockwise around the main shaft 12 during the movement of the first connecting member 1113 toward the first swing arm 1111 in the first track groove 1201 of the main shaft 12. Thus, the first support arm 1112 drives the second housing fixing frame 114 to rotate clockwise around the main shaft 12. During the process of the electronic device changing from a closed state to an unfolded state, the first housing fixing frame 113 and the second housing fixing frame 114 move in opposite directions. The first housing fixing frame 113 drives the first rotating arm 1116 and the first swing arm 1111 to rotate clockwise around the main shaft 12. The first rotating arm 1116 can restrict the rotation angle of the first housing fixing frame 113 during the rotation around the first hinge axis. The first swing arm 1111 can drive the first connecting piece 1113 to move towards the first support arm 1112 in the first track groove 1201 of the main shaft 12, thereby driving the first support arm 1112 to rotate counterclockwise around the main shaft 12, so as to drive the second housing fixing frame 114 to rotate counterclockwise around the main shaft 12 through the first support arm 1112.

[0128] Some existing rotating shaft mechanisms require increased thickness of the rotating components connected to the main shaft to ensure stability. This results in both the main shaft and the rotating shaft mechanism being very thick and heavy. Forcibly thinning these components can weaken their strength, significantly impacting the reliability of the rotating shaft mechanism and consequently reducing the lifespan of the electronic device. The rotating shaft mechanism described in this application has a simplified structure. Through the aforementioned structural relationship, a relatively small first connecting member 1113 can pass through the first track groove 1201 of the main shaft 12. The first track groove 1201 thus has a small size that matches the first connecting member 1113. This allows the main shaft 12 to meet the movement requirements of the first connecting member 1113 with a smaller thickness and width, achieving both a reduction in the size of the main shaft 12 and maintaining the reliability of the rotating shaft mechanism 1. In addition, as the distance between the rotation axis of the first rotating arm 1116 and the flexible display screen is reduced, the overlap between the first rotating arm 1116 and the first housing fixing frame 113 is still large enough even when the width of the main shaft 12 is reduced. This can reduce the sway angle of the first housing fixing frame 113 relative to the main shaft 12 and improve the stability of the rotating shaft mechanism 1.

[0129] Furthermore, since the first connector 1113 can move along a set trajectory within the first track groove 1201, uncontrolled movement of the first connector 1113 during the entire closing and unfolding process can be avoided, thus preventing random movement of the first housing fixing frame 113. Combined with the constraint effect of the first rotating arm 1116 on the first housing fixing frame 113, the structural and motion stability of the entire rotating shaft mechanism 1 can be effectively improved. In some cases, through reasonable design of the first track groove 1201, the outer tangent of the rotating shaft mechanism 1 can also maintain a constant length throughout the folding and unfolding process. This allows the flexible display screen covering the surface of the rotating shaft mechanism 1 to maintain a relatively constant length, effectively preventing compression or stretching of the flexible display screen, thereby improving the structural reliability of the flexible display screen and, consequently, the structural reliability of the electronic device.

[0130] You can continue to refer to this. Figure 4 and Figure 5Similar to the structure of the first rotating assembly 111, the second rotating assembly 112 may include a second swing arm 1121, a second support arm 1122, a second connecting member 1123, and a second rotating arm 1126. The second swing arm 1121 and the second support arm 1122 are respectively located on opposite sides of the main shaft 12. The second swing arm 1121 is slidably connected to the second housing fixing frame 114, and the second support arm 1122 is rotatably connected to the first housing fixing frame 113. The second connecting member 1123 is located between the second swing arm 1121 and the second support arm 1122, and is rotatably connected to both the second swing arm 1121 and the second support arm 1122, thereby allowing the second swing arm 1121 and the second support arm 1122 to pull against each other via the second connecting member 1123. The second rotating arm 1126 is rotatably connected to the main shaft 12, and the second rotating arm 1126 is slidably connected to the second housing fixing frame 114.

[0131] Please refer to the above. Figure 6 and Figure 7 The main shaft 12 may be provided with a second track groove 1202, and the second connecting member 1123 may move along the second track groove 1202, thereby using the second track groove 1202 to restrict the trajectory of the second connecting member 1123. During the process of the electronic device switching from the unfolded state to the closed state, the second connecting member 1123 may move within the second track groove 1202 toward the side where the second housing fixing frame 114 is located. Conversely, during the process of the electronic device switching from the closed state to the unfolded state, the second connecting member 1123 may move within the second track groove 1202 toward the side where the first housing fixing frame 113 is located.

[0132] refer to Figure 8 As shown, the base 121 may have a second arc-shaped groove 1212 on the side facing away from the main shaft. Additionally, the main shaft 12 may include a second fixing member 123, which may cover the second arc-shaped groove 1212. The second fixing member 123 has a second protrusion facing the second arc-shaped groove 1212, and a gap exists between the surface of the second protrusion and the groove surface of the second arc-shaped groove 1212. This gap can serve as a second trajectory groove.

[0133] refer to Figure 9As shown, the second connector 1123 is generally a strip-shaped structure, and the widths of its two ends can be unequal. For example, the two ends of the second connector 1123 respectively have a third arc surface 11231 and a fourth arc surface 11232, the diameter of the third arc surface 11231 being smaller than the diameter of the fourth arc surface 11232. In one embodiment, the end of the second connector 1123 near the third arc surface 11231 is rotatably connected to the second swing arm, and the end of the second connector 1123 near the fourth arc surface 11232 is rotatably connected to the second support arm. Since the end containing the fourth arc surface 11232 is the widest part of the second connector 1123, the second track groove can be designed according to the dimensions of the fourth arc surface 11232, or the fourth arc surface 11232 can be designed according to the dimensions of the second track groove, so that the second connector 1123 adapts to the second track groove.

[0134] Please refer to this again. Figure 4 The fourth arc surface 11232 of the second connector 1123 abuts against the surface of the second protrusion and the groove surface of the second arc groove 1212, thereby confining the second connector 1123 in the second track groove. In this way, the position of the second connector 1123 is relatively stable when the electronic device is in the unfolded and closed states, and no misalignment or wobbling will occur, so that the rotating shaft mechanism 1 has high reliability.

[0135] In some embodiments, the distance between the surface of the second protrusion and the groove surface of the second arcuate groove 1212 can be equal at all points, so that the second trajectory groove is formed as a groove of equal width. During the process of the electronic device moving from the unfolded state to the closed state, and from the closed state to the unfolded state, the surface of the second protrusion and the fourth arcuate surface 11232, and the groove surface of the second arcuate groove 1212 and the fourth arcuate surface 11232 are always in contact, so that the movement trajectory of the second connector 1123 can remain the same during the unfolding and closing of the electronic device.

[0136] In other embodiments, the movement trajectory of the second connector 1123 during the unfolding and closing of the electronic device may also be different. For example, during the process of the electronic device moving from the unfolded state to the closed state, the fourth arc surface 11232 abuts against the surface of the second protrusion, and there is a gap between the fourth arc surface 11232 and the groove surface of the second arc groove 1212. During the process of the electronic device moving from the closed state to the closed state, the fourth arc surface 11232 abuts against the groove surface of the second arc groove 1212, and there is a gap between the fourth arc surface 11232 and the surface of the second protrusion.

[0137] Please refer to the above. Figure 4 and Figure 9The second rotating assembly 112 further includes a third rotating shaft 1124 and a fourth rotating shaft 1125, wherein the axis of the third rotating shaft 1124 is parallel to and does not coincide with the axis of the fourth rotating shaft 1125. The second connecting member 1123 is rotatably connected to the second swing arm 1121 via the third rotating shaft 1124, and the second connecting member 1123 is rotatably connected to the second support arm 1122 via the fourth rotating shaft 1125.

[0138] In this embodiment, there can be multiple second connecting members 1123, which are distributed along the axial direction of the rotating shaft mechanism 1. In a specific implementation, the multiple second connecting members 1123 are rotatably connected to the second swing arm 1121 via a third rotating shaft 1124, and rotatably connected to the second support arm 1122 via a fourth rotating shaft 1125.

[0139] In one implementation, the second connector 1123 and the third rotating shaft 1124 are arranged in a one-to-one correspondence. For example, when there are two second connectors 1123, the third rotating shaft 1124 can be located on the side of the corresponding second connector 1123 facing away from the other second connector 1123. The two second connectors 1123 can be rotatably connected to the second support arm 1122 through a fourth rotating shaft 1125. In this case, the fourth rotating shaft 1125 can be respectively inserted into the hinge holes of the two second connectors 1123, so that the two second connectors 1123 can be connected into one unit using the fourth rotating shaft 1125.

[0140] Please refer to the above. Figure 8 and Figure 9 A fourth arc-shaped groove 1214 may be provided on the side of the base 121 facing away from the first surface of the main shaft 12. The fourth arc-shaped groove 1214 is arranged adjacent to the second arc-shaped groove 1212, and the depth of the fourth arc-shaped groove 1214 may be less than the depth of the second arc-shaped groove 1212. The second fixing member 123 may be simultaneously covered above the second arc-shaped groove 1212 and the fourth arc-shaped groove 1214. A fourth protrusion may also be provided on the side of the second fixing member 123 facing the base 121. The fourth protrusion is positioned opposite to the fourth arc-shaped groove 1214. At this time, the gap between the surface of the fourth protrusion and the groove surface of the fourth arc-shaped groove 1214 can form a fourth trajectory groove.

[0141] In one embodiment, the portion of the third rotating shaft 1124 extending beyond the second connector 1123 may be accommodated within a fourth track groove, thereby limiting the movement trajectory of the third rotating shaft 1124. In other embodiments, the portion of the fourth rotating shaft 1125 extending beyond the second connector 1123 may be accommodated within a fourth track groove, in which case the fourth track groove is used to limit the movement trajectory of the fourth rotating shaft 1125.

[0142] Taking the fourth rotating shaft 1125 in conjunction with the fourth track groove as an example, in a specific implementation, the portion of the fourth rotating shaft 1125 located between the two second connecting members 1123 can be accommodated within the fourth track groove. When the electronic device is in the unfolded state and the closed state, the surface of the fourth rotating shaft 1125 abuts against the surface of the fourth protrusion and the groove surface of the fourth arc-shaped groove 1214, respectively. Thus, the position of the fourth rotating shaft 1125 is relatively stable when the electronic device is in the unfolded state and the closed state. Combined with the constraint effect of the aforementioned second track groove on the second connecting member 1123, the solution of this application embodiment can effectively improve the stability of the second connecting member 1123 and the second swing arm 1121 and the second support arm 1122 that move synchronously with it, thereby further improving the reliability of the rotating shaft mechanism 1.

[0143] In the specific design of the fourth trajectory groove, the surface of the fourth protrusion can be an arc surface, and the groove surface of the fourth arc groove 1214 can also be an arc surface, with the center of the surface of the fourth protrusion coinciding with the center of the groove surface of the fourth arc groove 1214. It is worth mentioning that when both the surface of the fourth protrusion and the surface of the second protrusion are arc surfaces, the surface of the fourth protrusion and the surface of the second protrusion can be arc surfaces of the same arc, that is, the side of the second fixing member 123 facing the base 121 is a complete arc surface.

[0144] Furthermore, the distance between the surface of the fourth protrusion and the groove surface of the fourth arc-shaped groove 1214 can be equal at all points, so that the fourth trajectory groove is formed as a groove of equal width. During the process of the electronic device moving from the unfolded state to the closed state, and from the closed state to the unfolded state, the surface of the fourth protrusion and the surface of the fourth rotating shaft 1125, as well as the groove surface of the fourth arc-shaped groove 1214 and the surface of the fourth rotating shaft 1125, are always in contact. In this way, the movement trajectory of the fourth rotating shaft 1125 remains the same during the unfolding and closing of the electronic device, thereby improving the movement stability of the second rotating component.

[0145] Please refer to the above. Figure 4 and Figure 10A second arc-shaped rotating block 11211 may be provided on the side of the second swing arm 1121 near the base. Correspondingly, the base may be provided with a sixth arc-shaped groove 1216. The second arc-shaped rotating block 11211 of the second swing arm 1121 can be accommodated in the sixth arc-shaped groove 1216 and can rotate along the arc surface of the sixth arc-shaped groove 1216, thereby realizing the rotation of the second swing arm 1121 around the main shaft 12. In this embodiment, the rotation axis of the second swing arm 1121 is arranged along the axial direction of the rotating shaft mechanism 1, and for the outward folding electronic device, the rotation axis of the second swing arm 1121 is located on the side of the main shaft 12 away from the flexible display screen. Wherein, the second arc-shaped rotating block 11211 can be a circular arc-shaped rotating block, and the sixth arc-shaped groove 1216 can be a circular arc groove. In this case, the surface of the second arc-shaped rotating block 11211 that contacts the groove surface of the sixth arc-shaped groove 1216 is a circular arc surface, and the groove surface of the sixth arc-shaped groove 1216 is also a circular arc surface. The circles of the two circular arc surfaces coincide.

[0146] Please refer to the above. Figure 8 and Figure 10 The main shaft 12 may also include a fourth fixing member 125, which may cover the sixth arcuate groove 1216 and has a sixth protrusion facing the sixth arcuate groove 1216. At least a portion of the second arcuate rotating block 11211 is located between the sixth protrusion and the sixth arcuate groove 1216, and the second arcuate rotating block 11211 may contact the surface of the sixth protrusion, thereby confining the second arcuate rotating block 11211 between the fourth fixing member 125 and the base 121.

[0147] In one specific embodiment, there can be two second arc-shaped rotating blocks 11211, which are spaced apart along the axial direction of the rotating shaft mechanism. Correspondingly, there can also be two sixth arc-shaped grooves 1216, which are also spaced apart along the axial direction of the rotating shaft mechanism. The two second arc-shaped rotating blocks 11211 can be respectively accommodated in the two sixth arc-shaped grooves 1216, and each second arc-shaped rotating block 11211 can slide along the groove surface of the corresponding sixth arc-shaped groove 1216.

[0148] Please refer to the above. Figure 9 and Figure 10As shown in this embodiment, the side of the second connecting member 1123 near the second swing arm 1121 can be located between the two second arc-shaped rotating blocks 11211 to improve the structural compactness of the first rotating assembly. In this case, the two second arc-shaped rotating blocks 11211 are respectively provided with hinge holes a2. One end of the third rotating shaft 1124 is fixedly connected to the second connecting member 1123, and the other end is rotatably disposed within the hinge hole a2. Thus, during the rotation of the second swing arm 1121 around the main shaft, the second connecting member 1123 is pulled to move within the second track groove, achieving a rotational connection between the second swing arm 1121 and the second connecting member 1123.

[0149] Please refer to the above. Figure 9 and Figure 11 The second support arm 1122 is provided with a hinge hole b2. The fourth rotating shaft 1125 can pass through the hinge holes of the second support arm 1122 and the second connecting member 1123, thereby rotatably connecting the second support arm 1122 and the second connecting member 1123. In addition, the second support arm 1122 may include two second sub-support arms 11221, which are spaced apart along the axial direction of the rotating shaft mechanism. In this case, the side of the second connecting member 1123 closest to the second support arm 1122 can be located between the two second sub-support arms 11221 to further improve the structural compactness of the second rotating assembly.

[0150] Please refer to the above. Figure 4 and Figure 11 The second support arm 1122 is rotatably connected to the first housing fixing frame 113 at one end near the first housing fixing frame 113. In one specific implementation, the second support arm 1122 is provided with a hinge hole c2 at one end near the first housing fixing frame 113, and correspondingly, the first housing fixing frame 113 is provided with a hinge hole d2. The second support arm 1122 and the first housing fixing frame 113 can be rotatably connected by a rotating shaft passing through the hinge hole c2 and the hinge hole d2.

[0151] refer to Figure 4As shown, the second housing mounting bracket 114 is provided with a second slot 1141, which extends along a second direction. The end of the second swing arm 1121 away from the main shaft 12 can be disposed within the second slot 1141. During the rotation of the second swing arm 1121 around the main shaft 12, the second swing arm 1121 can slide within the second slot 1141 along the second direction. Furthermore, during sliding, the second swing arm 1121 can also swing slightly relative to the second housing mounting bracket 114, thereby reducing the risk of the second swing arm 1121 getting stuck in the second slot 1141 and improving the motion coordination between the second swing arm 1121 and the second housing mounting bracket 114. The second direction refers to the direction in which the second housing mounting bracket 114 approaches or moves away from the main shaft 12. It is easy to understand that the swing direction of the second swing arm 1121 relative to the second housing mounting bracket 114 is opposite to the rotation direction of the second swing arm 1121 relative to the main shaft 12.

[0152] To prevent the second swing arm 1121 from falling out of the second slot 1141, a second slide rail 11411 is provided on the wall of the second slot 1141. Correspondingly, a second slider 11212 can be provided on the side of the second swing arm 1121. The second slider 11212 is assembled in the second slide rail 11411. In this way, the second swing arm 1121 can be limited in the second slot 1141, and the second slide rail 11411 can be used to guide the movement of the second swing arm 1121 in the second slot 1141, so as to improve the movement stability of the second swing arm 1121.

[0153] Furthermore, along the second direction, the thickness of the second slide rail 11411 at various locations can remain approximately the same, and the second slider 11212 can have a gradually varying thickness. Specifically, along the direction away from the main shaft 12, the thickness of the second slider 11212 gradually increases, and the thickness of the end of the second slider 11212 away from the main shaft 12 is approximately equal to the thickness of the second slide rail 11411. Therefore, the thickness of the end of the second slider 11212 near the main shaft 12 is obviously less than the thickness of the second slide rail 11411. Thus, after the second slider 11212 is assembled into the second slide rail 11411, the end of the second slider 11212 away from the main shaft 12 can abut against the wall of the second slide rail 11411. A certain gap can be generated between the end of the second slider 11212 near the main shaft 12 and the wall of the second slide rail 11411. This can reduce the risk of the second slider 11212 swaying in the second slide rail 11411 and also enable the second slider 11212 to swing in the second slide rail 11411. That is, while realizing the rotation of the second swing arm 1121 relative to the second housing fixing frame 114, the risk of the second swing arm 1121 swaying is reduced, thereby further improving the motion stability of the second swing arm 1121.

[0154] Please refer to the above. Figure 4 , Figure 13 and Figure 14 As shown above, the second rotating arm 1126 is rotatably connected to the main shaft and slidably connected to the second housing fixing frame 114. In a specific implementation, the rotation axis of the second rotating arm 1126 is parallel to the rotation axis of the second swing arm 1121, and the axis of the second rotating arm 1126 is located on the side of the rotation axis of the second swing arm 1121 closer to the first surface of the main shaft 12. That is to say, the rotation axis of the second rotating arm 1126 is closer to the flexible display screen than the rotation axis of the second swing arm 1121.

[0155] In this embodiment, the second rotating arm 1126 has a second hinge shaft 11261 at one end near the base 121. The second rotating arm 1126 is rotatably connected to the base 121 via the second hinge shaft 11261, and the axis of the second hinge shaft 11261 is the rotation axis of the second rotating arm 1126. A second mounting groove 1218 may be provided on the side of the base 121 near the second housing fixing frame 114. The groove wall of the second mounting groove 1218 is provided with a hinge hole. The end of the second rotating arm 1126 near the base 121 is located in the second mounting groove 1218, and the second hinge shaft 11261 is rotatably disposed in the hinge hole.

[0156] Continue to refer to Figure 4 , Figure 13 and Figure 14 The second housing fixing frame 114 may be provided with a second slide groove 1142, which extends along a second direction. One end of the second rotating arm 1126 near the second housing fixing frame 114 is slidably disposed within the second slide groove 1142. Similarly, the groove wall of the second slide groove 1142 may be provided with a fourth slide rail, and the end of the second rotating arm 1126 along the axial direction of the rotating shaft mechanism 1 may be located within the fourth slide rail, thereby limiting the second rotating arm 1126 by the fourth slide rail and providing guidance for the sliding of the second rotating arm 1126.

[0157] In one implementation, the side of the second rotating arm 1126 facing the flexible display screen may be provided with a second groove 11262. The second housing bracket 114 includes a second limiting member 1143, which may be provided on the side of the second housing bracket 114 facing the flexible display screen, and the second limiting member 1143 has a second protrusion 11431 facing away from the flexible display screen. The side of the second housing bracket 114 facing the flexible display screen has a second through hole 1147 communicating with the second slide groove 1142. The second protrusion 11431 can enter the second slide groove 1142 through the second through hole 1147 and further extend into the second groove 11262 of the second rotating arm 1126, so as to restrict the sliding of the second rotating arm 1126 by means of the second protrusion 11431, thereby reducing the risk of the second rotating arm 1126 slipping out in the second slide groove 1142. In addition, a certain gap can be maintained between the end of the second protrusion 11431 and the bottom of the second groove 11262 to avoid friction between the second protrusion 11431 and the bottom of the second groove 11262, which would affect the smoothness of the sliding of the second rotating arm 1126.

[0158] Figure 17 This is a schematic diagram of another cross-sectional structure of the rotating shaft mechanism 1 provided in the embodiments of this application in the unfolded state of the electronic device. Figure 18 This is a schematic cross-sectional view of the rotating shaft mechanism 1 provided in the embodiments of this application in the closed state of the electronic device. See also... Figure 13 , Figure 14 as well as Figure 17 , Figure 18As shown, based on the rotating shaft mechanism provided in the above embodiments of this application, during the process of the electronic device changing from an unfolded state to a closed state, the first housing fixing frame 113 and the second housing fixing frame 114 move towards each other. The second housing fixing frame 114 drives the second rotating arm 1126 and the second swing arm 1121 to rotate clockwise. During this process, the second rotating arm 1126 rotates around the second hinge axis and the rotation angle of the second housing fixing frame 114 is restricted by the sliding connection relationship with the second housing fixing frame 114. The second swing arm 1121 slides along the groove surface of the sixth arc-shaped groove and drives the second connecting member 1123 to move toward the second swing arm 1121 in the second trajectory groove 1202 of the main shaft 12. Since the second connector 1123 is rotatably connected to the second support arm 1122, the second connector 1123 can drive the second support arm 1122 to rotate counterclockwise around the main shaft during the movement of the second connector 1123 toward the second swing arm 1121 in the second track groove 1202 of the main shaft 12. Thus, the second support arm 1122 drives the first housing fixing frame 113 to rotate counterclockwise around the main shaft 12. During the process of the electronic device changing from a closed state to an unfolded state, the first housing fixing frame 113 and the second housing fixing frame 114 move in opposite directions. The second housing fixing frame 114 drives the second rotating arm 1126 and the second swing arm 1121 to rotate counterclockwise around the main shaft 12. The second rotating arm 1126 can restrict the rotation angle of the second housing fixing frame 114 during the rotation around the second hinge axis. The second swing arm 1121 can drive the second connecting piece 1123 to move towards the second support arm 1122 in the second track groove 1202 of the main shaft 12, thereby driving the second support arm 1122 to rotate clockwise around the main shaft 12, so that the first housing fixing frame 113 can rotate clockwise around the main shaft 12 through the second support arm 1122.

[0159] The aforementioned rotating shaft mechanism of this application has a simplified structure. Through the aforementioned structural relationship, the relatively small second connecting member 1123 can move through the second track groove 1202 of the main shaft. The second track groove 1202 also has a small size that is compatible with the second connecting member 1123. In this way, the main shaft 12 can also meet the movement requirements of the second connecting member 1123 with a smaller thickness and width. This achieves the effect of reducing the size of the main shaft 12 while maintaining the reliability of the rotating shaft mechanism 1. In addition, since the rotation axis of the second rotating arm 1126 is closer to the flexible display screen, even with the reduction in the width of the main shaft 12, the overlap between the second rotating arm 1126 and the second housing fixing frame 114 is still large enough. This reduces the sway angle of the second housing fixing frame 114 relative to the main shaft 12 and improves the stability of the rotating shaft mechanism 1.

[0160] Furthermore, since the second connector 1123 can move along a set trajectory within the second track groove 1202, uncontrolled movement of the second connector 1123 during the entire closing and unfolding process can be avoided, thus preventing random movement of the second housing fixing frame 114. Combined with the constraint effect of the second rotating arm 1126 on the second housing fixing frame 114, the structural and motion stability of the entire rotating shaft mechanism 1 can be effectively improved. In some cases, through reasonable design of the second track groove 1202, the outer tangent of the rotating shaft mechanism 1 can also maintain a constant length throughout the folding and unfolding process, thereby ensuring that the flexible display screen covering the surface of the rotating shaft mechanism 1 also maintains a relatively constant length. This effectively avoids squeezing or pulling on the flexible display screen, thereby improving the structural reliability of the flexible display screen and, consequently, the structural reliability of the electronic device.

[0161] It is understood that by synchronizing the movement of the first and second housings during the unfolding and closing of the electronic device, the risk of the flexible display being subjected to instantaneous pressure or tensile stress can be effectively reduced. Based on this, the rotating shaft mechanism 1 provided in this embodiment may further include a synchronization component. (See also...) Figure 4 , Figure 19 and Figure 20 As shown, Figure 19 This is a schematic diagram of another cross-sectional structure of the rotating shaft mechanism 1 provided in the embodiments of this application in the unfolded state of the electronic device. Figure 20 This is a schematic cross-sectional view of the rotating shaft mechanism 1 provided in the embodiment of this application in the closed state of the electronic device. The synchronization component 13 may include a first gear link 131 and a second gear link 132, wherein the first gear link 131 includes a first gear 1311 and a first link 1312, and the second gear link 132 includes a second gear 1321 and a second link 1322. The first gear 1311 and the second gear 1321 are rotatably connected to the main shaft 12, and the first gear 1311 and the second gear 1321 are connected by transmission. The first link 1312 is slidably connected to the first housing fixing frame 113, and the second link 1322 is slidably connected to the second housing fixing frame 114.

[0162] In a specific implementation, the first gear 1311 can be rotatably connected to the main shaft 12 via a fifth rotating shaft to improve the stability of the first gear connecting rod rotating around the main shaft 12. The fifth rotating shaft extends axially along the rotating shaft mechanism 1. The first housing fixing frame 113 is provided with a third sliding groove 1134. The first connecting rod 1312 is installed in the third sliding groove 1134, and the first connecting rod 1312 can slide relative to the first housing fixing frame 113 in the third sliding groove 1134 in a direction close to or away from the main shaft 12, thereby realizing the sliding connection between the first connecting rod 1312 and the first housing fixing frame 113.

[0163] Similarly, the second gear 1321 can be rotatably connected to the main shaft 12 via a sixth rotating shaft to improve the stability of the second gear connecting rod 132 rotating around the main shaft 12. The sixth rotating shaft extends axially along the rotating shaft mechanism 1. The second housing fixing frame 114 is provided with a fourth sliding groove 1144. The second connecting rod 1322 is installed in the fourth sliding groove 1144, and the second connecting rod 1322 can slide relative to the second housing fixing frame 114 in the fourth sliding groove 1144 in a direction close to or away from the main shaft 12, thereby realizing the sliding connection between the second connecting rod 1322 and the second housing fixing frame 114.

[0164] In the embodiments of this application, the transmission connection between the first gear 1311 and the second gear 1321 can be achieved by the mutual meshing of the two, or an intermediate gear can be provided between the two, and the transmission connection between the first gear 1311 and the second gear 1321 can be achieved by the first gear 1311 and the second gear 1321 meshing with the adjacent intermediate gear respectively.

[0165] Continue to refer to Figure 19 and Figure 20 When the electronic device moves from an unfolded state to a closed state, the rotation of the first housing mounting bracket 113 drives the first gear connecting rod 131 to rotate around the main shaft 12. Since the first gear 1311 of the first gear connecting rod 131 is connected to the second gear 1321 of the second gear connecting rod 132, the rotation of the first gear connecting rod 131 drives the second gear connecting rod 132 to rotate in the opposite direction. Furthermore, the sliding of the second gear connecting rod 132 along the fourth sliding groove 1144 of the second housing mounting bracket 114 drives the second housing mounting bracket 114 to rotate in the same direction, thus achieving synchronous opposite rotation of the first housing mounting bracket 113 and the second housing mounting bracket 114. Additionally, when the electronic device moves from a closed state to an unfolded state, the direction of movement of each component is opposite to the direction of movement of the electronic device during the same process, thereby achieving synchronous opposite rotation of the first housing mounting bracket 113 and the second housing mounting bracket 114.

[0166] Figure 21 An exploded view of another partial structure of the rotating shaft mechanism 1 provided in an embodiment of this application. See also... Figure 4 and Figure 21 As shown, to better realize the opening and closing of the rotating shaft mechanism, the rotating shaft mechanism can also be provided with a damping module that can provide damping force to the aforementioned rotating module, so that the rotating module can rotate stably under the action of damping force and avoid accidental opening and closing of the electronic device. The rotating shaft mechanism may include one damping module, which can be correspondingly arranged with one of the rotating modules. Alternatively, the rotating shaft mechanism may also include multiple damping modules, which can be arranged at intervals along the axial direction of the rotating shaft mechanism, and the multiple damping modules can be corresponding one-to-one with the rotating modules.

[0167] In this embodiment, the damping module may include a first damping component 141 and a second damping component 142. The first damping component 141 and the second damping component 142 are respectively disposed on both sides of the main shaft 12, and the first damping component 141 is disposed corresponding to the first rotating component 111, and the second damping component 142 is disposed corresponding to the second rotating component 112. Figure 21 The structure of the pivot mechanism on one side of the first damping assembly 141 is shown in the figure. (Reference) Figure 21 As shown, the first housing fixing frame 113 may be provided with a first limiting wall 1135. The first limiting wall 1135 and the first swing arm 1111 may be spaced apart along the axial direction of the rotating shaft mechanism 1. The first damping component 141 may be disposed between the first limiting wall 1135 and the first swing arm 1111. In a specific implementation, when forming the first limiting wall 1135, the first housing fixing frame 113 may be provided with a first limiting groove 1136 arranged along the axial direction of the rotating shaft mechanism 1. The first limiting groove 1136 has a first opening facing the first swing arm 1111. In this case, the bottom wall of the first limiting groove 1136, which is opposite to the side where the first opening is located, can be formed as the first limiting wall 1135.

[0168] The first damping assembly 141 may include a first cam 1411, a second cam 1412, and a first elastic member 1413. The first cam 1411 may be disposed on the side of the first rocker arm 1111 facing the first limiting wall 1135, and the side of the first cam 1411 facing the first limiting wall 1135 has a first cam surface 14111. The second cam 1412 may be disposed on the side of the first cam 1411 facing away from the first rocker arm 1111, and the second cam 1412 is slidably disposed on the first housing fixing frame 113 along the axial direction of the rotating shaft mechanism 1. The side of the second cam 1412 facing the first cam 1411 has a second cam surface 14121. The first elastic member 1413 may be limited between the second cam 1412 and the first limiting wall 1135, thereby applying an elastic force to the second cam 1412, so that the second cam surface 14121 of the second cam 1412 abuts against the first cam surface 14111 of the first cam 1411.

[0169] In a specific implementation, the first cam 1411 can be fixed to the side of the first swing arm 1111 by means of bonding, welding, or riveting. Alternatively, the first cam 1411 can also be integrally formed with the first swing arm 1111, which can be understood as the first cam surface 14111 being directly formed on the side of the first swing arm 1111. This helps to simplify the manufacturing and assembly process of the rotating shaft mechanism 1. In addition, when the first housing bracket 113 is provided with a first limiting groove 1136, the first elastic member 1413 can be disposed in the first limiting groove 1136, and the second cam 1412 can be at least partially disposed in the first limiting groove 1136. This restricts the movement direction of the second cam 1412 under the drive of the first elastic member 1413 through the first limiting groove 1136, thereby improving the structural stability and reliability of the first damping assembly 141. In this case, the second cam surface 14121 of the second cam 1412 can abut against the first cam surface 14111 of the first cam 1411 through the first opening.

[0170] Optionally, the first elastic element 1413 can be Figure 21 The spring 14131 shown is an example. The number of springs 14131 can be set according to the magnitude of the damping force required by the first damping assembly 141 and the space of the rotating shaft mechanism, etc. Figure 21 The diagram illustrates a configuration with three springs 14131, which can be arranged in parallel between the second cam 1412 and the first limiting wall 1135. Additionally, the first damping assembly 141 may include a first guide post 14132 corresponding to each spring 14131. This first guide post 14132 is fixed to the side of the second cam 1412 opposite to the first cam 1411 and extends axially along the rotating shaft mechanism 1. The spring 14131 can be fitted onto the corresponding first guide post 14132, thereby reducing the risk of displacement of the spring 14131 during elastic deformation. Exemplarily, the first guide post 14132 and the second cam 1412 can be an integral structure to simplify the manufacturing and assembly process of the first damping assembly 141.

[0171] Of course, in some other embodiments, the first elastic element 1413 can also be a spring sheet, and there can be multiple spring sheets, which can be stacked between the second cam 1412 and the first limiting wall 1135.

[0172] In the embodiments of this application, both the first cam surface 14111 and the second cam surface 14121 may include multiple protrusions and recesses. When the inclined surfaces of the protrusions of the two cam surfaces come into contact, a damping force that prevents the two cam surfaces from continuing to rotate relative to each other can be generated between the two cam surfaces. By rationally designing the curved contours of the first cam surface 14111 and the second cam surface 14121, the first cam 1411 can push the second cam 1412 towards the first limiting wall 1135 during the closing process of the rotating shaft mechanism, as the first swing arm 1111 rotates, thereby compressing the first elastic element 1413 and providing the user with a more obvious operating feel, which is beneficial to improving the user experience. During the unfolding process of the rotating shaft mechanism 1, the first elastic element 1413 gradually rebounds from the compressed state and releases the accumulated elastic potential energy, thereby pushing the second cam 1412 to slide towards the first cam 1411. In this way, the second cam 1412 can apply a torque to the first cam 1411 and the first swing arm to assist their rotation, thereby providing a certain unfolding assistance to the rotating shaft mechanism 1 and reducing the difficulty of unfolding the rotating shaft mechanism 1.

[0173] Furthermore, in this embodiment, through the rational design of the first cam surface 14111 and the second cam surface 14121, the first cam 1411 and the first swing arm 1111 can be hovered at a set angle, that is, the first rotating component can be hovered. When the rotating shaft mechanism 1 is applied to an electronic device, the hovering design of the first rotating component can allow the electronic device to be positioned in some intermediate states, thereby further improving the user experience.

[0174] Similar to the structure of the first damping component, when specifically setting the second damping component, the second housing fixing frame may be provided with a second limiting wall. This second limiting wall and the second swing arm may be spaced apart along the axial direction of the rotating shaft mechanism, and the second damping component may be disposed between the second limiting wall and the second swing arm. In one specific implementation, when forming the second limiting wall, the second housing fixing frame may be provided with a second limiting groove arranged along the axial direction of the rotating shaft mechanism. This second limiting groove has a second opening facing the second swing arm. In this case, the bottom wall of the second limiting groove, which is opposite to the side where the second opening is located, can be formed as the second limiting wall.

[0175] The second damping assembly may include a third cam, a fourth cam, and a second elastic element. The third cam may be disposed on the side of the second swing arm facing the second limiting wall, and the side of the third cam facing the second limiting wall has a third cam surface. The fourth cam may be disposed on the side of the third cam away from the second swing arm, and the fourth cam is slidably disposed on the second housing fixing frame along the axial direction of the rotating shaft mechanism, and the side of the fourth cam facing the third cam has a fourth cam surface. The second elastic element may be confined between the fourth cam and the second limiting wall, thereby applying an elastic force to the fourth cam, so that the fourth cam surface of the fourth cam abuts against the third cam surface of the third cam.

[0176] In a specific implementation, the first cam can be fixed to the side of the first swing arm by means of bonding, welding, or riveting. Alternatively, the first cam can also be integrally formed with the first swing arm. Furthermore, when the second housing support is provided with a second limiting groove, the second elastic element can be disposed within the second limiting groove, and the fourth cam can be at least partially disposed within the second limiting groove. This restricts the movement direction of the fourth cam under the second elastic drive through the second limiting groove, improving the structural stability and reliability of the second damping assembly. In this case, the fourth cam surface of the fourth cam can abut against the third cam surface of the third cam through the second opening.

[0177] Optionally, the second elastic element can be a spring or a spring sheet. When the second elastic element is a spring, there can be multiple springs, which can be connected in parallel between the fourth cam and the second limiting wall. The second damping assembly may also include a second guide post corresponding to each spring. The second guide post can be fixed to the side of the fourth cam opposite to the first cam and extends axially along the rotating shaft mechanism. The spring can be sleeved on the corresponding second guide post, thereby reducing the risk of spring displacement when elastic deformation occurs.

[0178] In this embodiment, both the third and fourth cam surfaces can include multiple protrusions and recesses. When the inclined surfaces of the protrusions of the two cam surfaces come into contact, a damping force can be generated between the two cam surfaces to prevent them from continuing to rotate relative to each other. Through the reasonable design of the curved contours of the third and fourth cam surfaces, during the closing process of the rotating shaft mechanism, as the second swing arm rotates, the third cam can push the fourth cam towards the second limiting wall, thereby compressing the second elastic element and providing the user with a more obvious operating feel, thus improving the user experience. During the unfolding process of the rotating shaft mechanism, the second elastic element gradually rebounds from its compressed state and releases the accumulated elastic potential energy, thereby pushing the fourth cam towards the third cam. In this way, the fourth cam can apply a torque to the third cam and the second swing arm to assist their rotation, thereby providing a certain unfolding assistance to the rotating shaft mechanism and reducing the difficulty of unfolding the rotating shaft mechanism.

[0179] Furthermore, in this embodiment, through the rational design of the third and fourth cam surfaces, the third cam and the second swing arm can be hovered at a set angle, thus enabling the second rotating component to hover as well. When the rotating mechanism is applied to electronic devices, the hovering design of the second rotating component allows the electronic device to be positioned in some intermediate states, thereby further enhancing the user experience.

[0180] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A rotating shaft mechanism, characterized in that, The system includes a main shaft, a first rotating assembly, a second rotating assembly, a first housing mounting bracket, and a second housing mounting bracket. The main shaft has a first surface for supporting the flexible display screen. The first housing mounting bracket and the second housing mounting bracket are respectively disposed on both sides of the main shaft. The first rotating assembly includes a first swing arm, a first support arm, a first connector, and a first rotating arm. The first swing arm is rotatably connected to the main shaft and slidably connected to the first housing frame. The first support arm is rotatably connected to the second housing frame. The first connector is located between the first swing arm and the first support arm, and is rotatably connected to both the first swing arm and the first support arm. The first rotating arm is rotatably connected to the main shaft, and the rotation axis of the first rotating arm is parallel to the rotation axis of the first swing arm, with the rotation axis of the first rotating arm located on the side of the rotation axis of the first swing arm closer to the first surface. The first rotating arm is slidably connected to the first housing frame. The second rotating assembly includes a second swing arm, a second support arm, a second connector, and a second rotating arm. The second swing arm is rotatably connected to the main shaft and slidably connected to the second housing frame. The second support arm is rotatably connected to the first housing frame. The second connector is located between the second swing arm and the second support arm, and is rotatably connected to both the second swing arm and the second support arm. The second rotating arm is rotatably connected to the main shaft, and the rotation axis of the second rotating arm is parallel to the rotation axis of the second swing arm, with the rotation axis of the second rotating arm located on the side of the rotation axis of the second swing arm closer to the first surface. The second rotating arm is slidably connected to the second housing frame. The spindle is provided with a first track groove and a second track groove. The first connecting member can move along the first track groove to limit the movement trajectory of the first connecting member through the first track groove. The second connecting member can move along the second track groove to limit the movement trajectory of the second connecting member through the second track groove.

2. The rotating shaft mechanism as described in claim 1, characterized in that, The first rotating arm has a first hinge shaft, and the first rotating arm is rotatably connected to the main shaft through the first hinge shaft; The second rotating arm has a second hinge shaft, and the second rotating arm is rotatably connected to the main shaft through the second hinge shaft.

3. The rotating shaft mechanism as described in claim 1, characterized in that, The first housing fixing frame is provided with a first sliding groove, and the first rotating arm is disposed in the first sliding groove. During the process of the first rotating arm rotating around the main shaft, the first rotating arm slides relative to the first housing fixing frame in the first sliding groove in a direction toward or away from the main shaft. The second housing fixing frame is provided with a second sliding groove, and the second rotating arm is disposed in the second sliding groove. During the process of the second rotating arm rotating around the main shaft, the second rotating arm slides relative to the second housing fixing frame in the second sliding groove in a direction toward or away from the main shaft.

4. The rotating shaft mechanism as described in claim 3, characterized in that, The first rotating arm is provided with a first groove on the side facing the first surface of the main shaft; the first housing fixing frame is provided with a first through hole communicating with the first slide groove on the side of the same side as the first surface of the main shaft, and a first limiting member is provided at the first through hole. The first limiting member has a first protrusion facing the first slide groove, and the end of the first protrusion extends into the first groove. The first protrusion can slide in the first groove. The second rotating arm is provided with a second groove on the side facing the first surface of the main shaft; the second housing fixing frame is provided with a second through hole communicating with the second slide groove on the side of the same side as the first surface of the main shaft, and a second limiting member is provided at the second through hole. The second limiting member has a second protrusion facing the second slide groove, and the end of the second protrusion extends into the second groove. The second protrusion can slide in the second groove.

5. The rotating shaft mechanism as described in any one of claims 1 to 4, characterized in that, The first housing fixing frame is provided with a first slot, and the end of the first swing arm away from the main shaft is disposed in the first slot. During the rotation of the first swing arm around the main shaft, the first swing arm slides relative to the first housing fixing frame in the first slot in a direction toward or away from the main shaft. The second housing fixing frame is provided with a second slot, and the end of the second swing arm away from the main shaft is disposed in the second slot. During the rotation of the second swing arm around the main shaft, the second swing arm slides relative to the second housing fixing frame in the second slot in a direction toward or away from the main shaft.

6. The rotating shaft mechanism as described in claim 5, characterized in that, During the sliding process of the first swing arm within the first slot, it swings relative to the first housing fixing frame, and the swing direction of the first swing arm relative to the first housing fixing frame is opposite to the rotation direction of the first swing arm around the main shaft. During the sliding process of the second swing arm within the second slot, it swings relative to the second housing fixing frame, and the swing direction of the second swing arm relative to the second housing fixing frame is opposite to the rotation direction of the second swing arm around the main shaft.

7. The rotating shaft mechanism as described in claim 6, characterized in that, The first groove has a first slide rail on its wall, and the thickness of the first slide rail is the same at any position. The first rocker arm has a first slider on its side, and the first slider is assembled in the first slide rail. The thickness of the first slider gradually increases along the direction away from the main shaft, and the thickness of the end of the first slider away from the main shaft is equal to the thickness of the first slide rail. The second groove has a second slide rail on its wall, and the thickness of the second slide rail is the same at any position. The second rocker arm has a second slider on its side, which is assembled in the second slide rail. The thickness of the second slider gradually increases in the direction away from the main shaft, and the thickness of the end of the second slider away from the main shaft is equal to the thickness of the first slide rail.

8. The rotating shaft mechanism as described in any one of claims 1 to 4, characterized in that, The spindle includes a base, a first fixing member, and a second fixing member. The base has a first arc-shaped groove and a second arc-shaped groove on the side opposite to the first surface of the spindle. The first fixing member covers the first arc-shaped groove, and the second fixing member covers the second arc-shaped groove. The first fixing member has a first protrusion on the side facing the base. The gap between the surface of the first protrusion and the groove surface of the first arc-shaped groove serves as the first trajectory groove. When the rotating shaft mechanism is in the unfolded state and the closed state, the surface of the first connecting member abuts against the surface of the first protrusion and the groove surface of the first arc-shaped groove, respectively. The second fixing member has a second protrusion on the side facing the base. The gap between the surface of the second protrusion and the groove surface of the second arc-shaped groove serves as the second trajectory groove. When the rotating shaft mechanism is in the unfolded state and the closed state, the surface of the second connecting member abuts against the surface of the second protrusion and the groove surface of the second arc-shaped groove, respectively.

9. The rotating shaft mechanism as described in claim 8, characterized in that, The first rotating assembly further includes a first rotating shaft and a second rotating shaft. The first connecting member is rotatably connected to the first swing arm through the first rotating shaft, and the first connecting member is rotatably connected to the first support arm through the second rotating shaft. The axis of the first rotating shaft and the axis of the second rotating shaft are parallel and do not coincide. The second rotating assembly further includes a third rotating shaft and a fourth rotating shaft. The second connecting member is rotatably connected to the second swing arm through the third rotating shaft, and the second connecting member is rotatably connected to the second support arm through the fourth rotating shaft. The axis of the third rotating shaft is parallel to and does not coincide with the axis of the fourth rotating shaft.

10. The rotating shaft mechanism as described in claim 9, characterized in that, The base has a third arc-shaped groove and a fourth arc-shaped groove on the side facing away from the main shaft. The third arc-shaped groove is adjacent to the first arc-shaped groove, and the depth of the third arc-shaped groove is less than the depth of the first arc-shaped groove. The fourth arc-shaped groove is adjacent to the second arc-shaped groove, and the depth of the fourth arc-shaped groove is less than the depth of the second arc-shaped groove. The first fixing member is covered by the third arc-shaped groove. The first fixing member has a third protrusion on the side facing the base. The surface of the third protrusion and the groove surface of the third arc-shaped groove form a third trajectory groove. The portion of the first rotating shaft or the second rotating shaft that extends beyond the first connecting member is accommodated in the third trajectory groove so as to restrict the movement trajectory of the first rotating shaft or the second rotating shaft through the third trajectory groove. The second fixing member is covered by the fourth arc-shaped groove. The first fixing member has a fourth protrusion on the side facing the base. The surface of the fourth protrusion and the groove surface of the fourth arc-shaped groove form a fourth trajectory groove. The portion of the third or fourth rotating shaft that extends beyond the first connecting member is accommodated in the fourth trajectory groove so as to restrict the movement trajectory of the third or fourth rotating shaft through the third trajectory groove.

11. The rotating shaft mechanism according to any one of claims 1 to 4, characterized in that, The main shaft includes a base, and a fifth arc-shaped groove and a sixth arc-shaped groove are provided on the side of the base facing away from the first surface of the main shaft. The first swing arm includes a first arc-shaped rotating block, which is disposed in the fifth arc-shaped groove and can slide along the groove surface of the fifth arc-shaped groove to rotatably connect the first swing arm to the main shaft. The second swing arm includes a second arc-shaped rotating block, which is disposed in the sixth arc-shaped groove, and the second arc-shaped rotating block can slide along the groove surface of the sixth arc-shaped groove to rotatably connect the second swing arm to the main shaft.

12. The rotating shaft mechanism as described in claim 11, characterized in that, The main shaft also includes a third fixing member, which covers the fifth arc-shaped groove and the sixth arc-shaped groove. The third fixing member has a fifth protrusion facing the fifth arc-shaped groove and a sixth protrusion facing the sixth arc-shaped groove. At least a portion of the first arc-shaped rotating block is located between the fifth protrusion and the fifth arc-shaped groove, and at least a portion of the second arc-shaped rotating block is located between the sixth protrusion and the sixth arc-shaped groove.

13. The rotating shaft mechanism as described in any one of claims 1 to 4, characterized in that, The number of the first connecting members is multiple, and the multiple first connecting members are arranged along the axial direction of the rotating shaft mechanism, and each first connecting member is rotatably connected to the first swing arm and the first support arm respectively. The number of the second connecting members is multiple, and the multiple second connecting members are arranged along the axial direction of the rotating shaft mechanism, and each second connecting member is rotatably connected to the second swing arm and the second support arm respectively.

14. The rotating shaft mechanism according to any one of claims 1 to 4, characterized in that, The rotating shaft mechanism also includes a synchronization component, which includes a first gear connecting rod and a second gear connecting rod; The first gear connecting rod includes a first gear and a first connecting rod. The first gear is rotatably connected to the main shaft, and the first connecting rod is slidably connected to the first housing fixing frame. The second gear connecting rod includes a second gear and a second connecting rod. The second gear is rotatably connected to the main shaft, and the second connecting rod is slidably connected to the second housing fixing frame. The first gear and the second gear are drively connected.

15. The rotating shaft mechanism according to any one of claims 1 to 4, characterized in that, The first housing fixing frame is provided with a first limiting wall, which is spaced apart from the first swing arm along the axial direction of the rotating shaft mechanism; the second housing fixing frame is provided with a second limiting wall, which is spaced apart from the second swing arm along the axial direction of the rotating shaft mechanism; the rotating shaft mechanism further includes a first damping component and a second damping component, wherein: The first damping component is disposed between the first swing arm and the first limiting wall. The first damping component includes a first cam, a second cam, and a first elastic element. The first cam is disposed on the side of the first swing arm facing the first limiting wall. The second cam is located on the side of the first cam away from the first swing arm, and the second cam is slidably disposed on the first housing fixing frame along the axial direction of the rotating shaft mechanism. The cam surface of the second cam abuts against the cam surface of the first cam. The first elastic element is limited between the second cam and the first limiting wall. The second damping component is disposed between the second swing arm and the second limiting wall. The first damping component includes a third cam, a fourth cam, and a second elastic element. The third cam is disposed on the side of the second swing arm facing the second limiting wall. The fourth cam is disposed on the side of the third cam away from the second swing arm, and the fourth cam is slidably disposed on the second housing fixing frame along the axial direction of the rotating shaft mechanism. The cam surface of the fourth cam abuts against the cam surface of the third cam. The second elastic element is limited between the fourth cam and the second limiting wall.

16. The rotating shaft mechanism as described in claim 15, characterized in that, The first housing support is provided with a first limiting groove arranged along the axial direction of the rotating shaft mechanism. The first limiting groove has a first opening facing the first swing arm. The groove wall in the first limiting groove and the groove wall opposite to the first opening are formed as the first limiting wall. The first elastic element is disposed in the first limiting groove. The second cam is at least partially disposed in the first limiting groove, and the cam surface of the second cam abuts against the cam surface of the first cam through the first opening. The second housing support is provided with a second limiting groove arranged along the axial direction of the rotating shaft mechanism. The second limiting groove has a second opening facing the second swing arm. The groove wall in the second limiting groove opposite to the second opening is formed as the second limiting wall. The second elastic element is disposed in the second limiting groove. The fourth cam is at least partially disposed in the second limiting groove, and the cam surface of the fourth cam abuts against the cam surface of the third cam through the second opening.

17. An electronic device, characterized in that, It includes a first housing, a second housing, a flexible display screen, and a rotating shaft mechanism as described in any one of claims 1 to 16, wherein: The first housing and the second housing are respectively disposed on opposite sides of the rotating shaft mechanism. The first housing fixing frame is fixedly connected to the first housing, and the second housing fixing frame is fixedly connected to the second housing. The flexible display screen continuously covers the first housing, the second housing, and the rotating shaft mechanism, and the flexible display screen is fixedly connected to the first housing and the second housing.

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