Rotating shaft mechanism and electronic equipment

Abstract

The invention discloses a rotating shaft mechanism and electronic equipment, and aims to reduce the size of the rotating shaft mechanism of the electronic equipment and improve the use reliability of a flexible display screen of the electronic equipment. The rotating shaft mechanism comprises a main shaft, a first rotating assembly and a first shell fixing frame, the first rotating assembly 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 slidably connected with the first shell fixing frame, and the first swing arm can rotate relative to the first shell fixing frame; the first supporting arm is rotationally connected with the second shell fixing frame; the first connecting piece is located between the first swing arm and the first supporting arm, and the first connecting piece is rotationally connected with the first swing arm and the first supporting arm. The first rotating arm is rotationally connected with the main shaft, and the first rotating arm is in sliding connection 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] The present application relates to the technical field of electronic equipment, and in particular to a rotating shaft mechanism and electronic equipment. Background Art

[0002] As flexible display technology matures, the display mode of electronic devices has undergone tremendous changes. Foldable flexible display mobile phones, foldable flexible display tablets, and wearable electronic devices with foldable flexible displays are an important evolutionary direction for future smart electronic devices.

[0003] The hinge mechanism is a key component for foldable electronic devices to achieve the folding function. It can flatten or bend the flexible display screen of the electronic device during the unfolding and closing process of the electronic device, and prevent the flexible display screen from being pulled or squeezed during the unfolding and closing process of the electronic device. However, the hinge mechanism currently used in electronic devices is often large in size to achieve the above functions, which makes it difficult to meet the design requirements of miniaturization and thinness of electronic devices. Summary of the invention

[0004] The present application provides a hinge mechanism and an electronic device, so as to reduce the size of the hinge mechanism of the electronic device and improve the reliability of the flexible display screen of the electronic device.

[0005] In the first aspect, the present application provides a hinge mechanism, which is applied to a foldable electronic device, and may include a main shaft, a first rotating assembly, a second rotating assembly, a first shell fixing frame, and a second shell fixing frame. The main shaft has a first surface for supporting a flexible display screen of the electronic device, and the first shell fixing frame and the second shell fixing frame are respectively arranged on both sides of the main shaft. The first rotating assembly may include a first swing arm, a first support arm, a first connecting member, and a first rotating arm, the first swing arm is rotationally connected to the main shaft, and the first swing arm is slidably connected to the first shell fixing frame; the first support arm is rotationally connected to the second shell fixing frame; the first connecting member is located between the first swing arm and the first support arm, and the first connecting member is rotationally connected to the first swing arm and the first rotating arm respectively; the first rotating arm is rotationally 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 rotation axis of the first swing arm close to the first surface of the main shaft, and the first rotating arm is slidably connected to the first shell fixing frame. The second rotating assembly may include a second swing arm, a second supporting arm, a second connecting piece and a second rotating arm, the second swing arm is rotationally connected to the main shaft, and the second swing arm is slidably connected to the second shell fixing frame; the second supporting arm is rotationally connected to the first shell fixing frame; the second connecting piece is located between the second swing arm and the second supporting arm, and the second connecting piece is rotationally connected to the second swing arm and the second rotating arm respectively; the second rotating arm is rotationally connected to the main shaft, the rotation axis of the second rotating arm is parallel to the rotation axis of the second swing arm, and the rotation axis of the second rotating arm is located on the side of the first surface of the rotation axis of the second swing arm close to the main shaft, and the second rotating arm is slidably connected to the second shell fixing frame.

[0006] In the present application, during the closing process of the electronic device, the first shell fixing frame and the second shell fixing frame rotate towards each other, and the first shell fixing frame drives the first rotating arm and the first swing arm to rotate. The first rotating arm can utilize the sliding relationship with the first shell fixing frame to restrict the rotation angle of the first shell fixing frame. The first swing arm can drive the first connecting member to move toward the first swing arm in the first track groove of the main shaft during the rotation process. Because the first connecting member is rotationally 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 shell fixing frame to rotate through the first support arm; the second shell fixing frame drives the second rotating arm and the second swing arm to rotate. The second rotating arm can utilize the sliding relationship with the second shell fixing frame to restrict the rotation angle of the second shell fixing frame. The second swing arm can drive the second connecting member to move toward the second swing arm in the second track groove of the main shaft during the rotation process. Because the second connecting member is rotationally 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 shell fixing frame to rotate through the second support arm. During the unfolding of the electronic device, the first shell fixing frame and the second shell fixing frame rotate opposite to each other, and the first shell fixing frame drives the first rotating arm and the first swing arm to rotate. The first rotating arm can utilize the sliding relationship with the first shell fixing frame to restrict the rotation angle of the first shell fixing frame. The first swing arm can drive the first connecting member to move toward the first support arm in the first track groove of the main shaft during the rotation process. Because the first connecting member is rotationally 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 shell fixing frame to rotate through the first support arm; the second shell fixing frame drives the second rotating arm and the second swing arm to rotate. The second rotating arm can utilize the sliding relationship with the second shell fixing frame to restrict the rotation angle of the second shell fixing frame. The second swing arm can drive the second connecting member to move toward the second support arm in the second track groove of the main shaft during the rotation process. Because the second connecting member is rotationally 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 shell fixing frame to rotate through the second support arm.

[0007] The hinge mechanism of the present application can realize the linkage of the various components of the first rotating assembly by using the first rotating member with a relatively small volume, and can realize the linkage of the various components of the second rotating assembly by using the second rotating member with a relatively small volume, so that the main shaft can meet the movement requirements of the first rotating member and the second rotating member with a smaller thickness and width, thus helping to reduce the size of the hinge mechanism. In addition, since the rotation axis of the first rotating arm and the rotation axis of the second rotating arm are closer to the flexible display screen, when the width of the main shaft is reduced, the overlap amount of the first rotating arm and the first shell fixing frame, and the overlap amount of the second rotating arm and the second shell fixing frame are still large enough, thereby reducing the virtual swing angle of the first shell fixing frame and the second shell fixing frame relative to the main shaft, and improving the stability of the hinge mechanism.

[0008] In addition, since the first connecting member and the second connecting member can move according to the set trajectory, the uncontrolled movement of the first connecting member and the second connecting member during the entire closing and unfolding process can be avoided, thereby avoiding the random movement of the first shell fixing frame and the second shell fixing frame. In combination with the restraining effect of the first rotating arm on the first shell fixing frame and the restraining effect of the second rotating arm on the second shell fixing frame, the structure and movement stability of the entire hinge mechanism can be effectively improved. In some cases, by reasonably designing the first track groove and the second track groove, the outer tangent of the hinge mechanism can also maintain a constant length during the entire folding and unfolding process, thereby allowing the flexible display screen covering the surface of the hinge mechanism to basically maintain a constant length. In this way, squeezing or pulling the flexible display screen can be effectively avoided, thereby improving the structural reliability of the flexible display screen, and thereby improving the structural reliability of the electronic device.

[0009] In some embodiments, the first rotating arm may have a first hinge axis, through which the first rotating arm is rotatably connected to the main shaft, in which case the axis of the first hinge axis is the axis of rotation of the first rotating arm, and this rotation connection method can effectively shorten the distance between the axis of rotation of the first rotating arm and the flexible display screen. Similarly, the second rotating arm may have a second hinge axis, through which the second rotating arm is rotatably connected to the main shaft, in which case the axis of the second hinge axis is the axis of rotation of the second rotating arm, and this rotation connection method can effectively shorten the distance between the axis of rotation of the second rotating arm and the flexible display screen.

[0010] In some embodiments, a first mounting groove may be provided on one side of the base close to the first housing fixing frame, a hinge hole is provided on the groove wall of the first mounting groove, an end of the first rotating arm close to the base is located in the first mounting groove, and a first hinge shaft is rotatably provided in the hinge hole, so that the first rotating arm can be rotatably connected to the base through the first hinge shaft. A second mounting groove may be provided on one side of the base close to the second housing fixing frame, a hinge hole is provided on the groove wall of the second mounting groove, an end of the second rotating arm close to the base is located in the second mounting groove, and a second hinge shaft is rotatably provided in the hinge hole, so that the second rotating arm can be rotatably connected to the base through the second hinge shaft.

[0011] In some embodiments, the first housing fixing frame may be provided with a first slide groove, the first rotating arm is provided in the first slide groove, and during the process of the first rotating arm rotating around the main axis, the first rotating arm may slide relative to the first housing fixing frame in a direction toward or away from the main axis. The second housing fixing frame may be provided with a second slide groove, the second rotating arm is provided in the second slide groove, and during the process of the second rotating arm rotating around the main axis, the second rotating arm may slide relative to the second housing fixing frame in a direction toward or away from the main axis.

[0012] In some embodiments, a first groove may be provided on one side of the first rotating arm facing the first surface of the main shaft, a first through hole connected to the first slide groove may be provided on one side of the first housing fixing frame arranged on the same side as the first surface of the main shaft, and a first stopper is provided at the first through hole, the first stopper has a first protrusion arranged toward 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, so that the first protrusion is used to limit the sliding of the first rotating arm, reducing the risk of the first rotating arm slipping out of the first slide groove. Similarly, a second groove may be provided on one side of the second rotating arm facing the first surface of the main shaft, a second through hole connected to the second slide groove may be provided on one side of the second housing fixing frame arranged on the same side as the first surface of the main shaft, and a second stopper is provided at the second through hole, the second stopper has a second protrusion arranged toward 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, so that the second protrusion is used to limit the sliding of the second rotating arm, reducing the risk of the second rotating arm slipping out of the second slide groove.

[0013] In some embodiments, the first housing fixing frame may be provided with a first slot, and one end of the first swing arm away from the main axis is provided in the first slot. During the rotation of the first swing arm around the main axis, the first swing arm may slide in the first slot relative to the first housing fixing frame in a direction toward or away from the main axis. The second housing fixing frame may be provided with a second slot, and one end of the second swing arm away from the main axis is provided in the second slot. During the rotation of the second swing arm around the main axis, the second swing arm may slide in the second slot relative to the second housing fixing frame in a direction toward or away from the main axis.

[0014] In some embodiments, the first swing arm can swing relative to the first housing fixing frame during the sliding process in the first slot, 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 axis. This design can reduce the risk of the first swing arm getting stuck in the first slot and improve the motion coordination of the first swing arm and the first housing fixing frame. The second swing arm can swing relative to the second housing fixing frame during the sliding process in the second slot, 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 axis. This design can reduce the risk of the second swing arm getting stuck in the second slot and improve the motion coordination of the second swing arm and the second housing fixing frame.

[0015] In some embodiments, the groove wall of the first groove may be provided with a first slide, and the thickness of the first slide at any position may be approximately the same; the side of the first swing arm may be provided with a first slider, and the first slider is assembled in the first slide, and the thickness of the first slider gradually increases in the direction away from the main axis, and the thickness of the first slider at one end away from the main axis may be approximately equal to the thickness of the first slide, then a certain gap may be generated between the thickness of the end of the first slider close to the main axis and the wall of the first slide, which can reduce the risk of the first slider shaking in the first slide, and also enable the first slider to swing in the first slide. Similarly, the groove wall of the second groove may be provided with a second slide, and the thickness of the second slide at any position may be approximately the same; a second slider may be provided on the side of the second swing arm, and the second slider is assembled in the second slide, and the thickness of the second slider gradually increases in the direction away from the main shaft, and the thickness of the second slider at one end away from the main shaft may be approximately equal to the thickness of the second slide, then a certain gap may be generated between the thickness of the end of the second slider close to the main shaft and the wall surface of the second slide, thereby reducing the risk of the second slider shaking in the second slide, and also enabling the second slider to swing in the second slide.

[0016] In some embodiments, the main shaft may include a base, a first fixing member and a second fixing member, and a first arc groove and a second arc groove may be provided on a side of the base facing away from the first side of the main shaft, the first fixing member covers the first arc groove, and the second fixing member covers the second arc groove. A first protrusion may be provided on the side of the first fixing member facing the base, and the gap between the surface of the first protrusion and the groove surface of the first arc groove may serve as a first track groove. When the rotating shaft mechanism is in an expanded state and a closed state, the surface of the first connecting member may abut against the surface of the first protrusion and the groove surface of the first arc groove, respectively, so that the surface of the first protrusion and the groove surface of the first arc groove limit the first connecting member to the first track groove, so that the position of the first connecting member can be relatively stable, and virtual position shaking will not occur, so that the rotating shaft mechanism has higher reliability.

[0017] Similarly, a second protrusion may be provided on the side of the second fixing member facing the base, and the gap between the surface of the second protrusion and the groove surface of the second arc groove may serve as a second track groove. When the pivot mechanism is in the expanded state and the closed state, the surface of the second connecting member may respectively abut the surface of the second protrusion and the groove surface of the second arc groove, so that the surface of the second protrusion and the groove surface of the second arc groove limit the second connecting member to the second track groove, so that the position of the second connecting member can be relatively stable, and no virtual position shaking will occur, so that the pivot mechanism has higher 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 may be rotatably connected via the first rotating shaft, the first connecting member and the first support arm may be rotatably connected via the second rotating shaft, so that the first swing arm and the first support arm can achieve mutual pulling motion via the first connecting member, wherein the axis of the first rotating shaft is parallel to the axis of the second rotating shaft and does not overlap. 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 may be rotatably connected via the third rotating shaft, the second connecting member and the second support arm may be rotatably connected via the fourth rotating shaft, so that the second swing arm and the second support arm can achieve mutual pulling motion via the second connecting member, wherein the axis of the third rotating shaft is parallel to the axis of the fourth rotating shaft and does not overlap.

[0019] In some embodiments, a third arc groove may be provided on one side of the first side of the base away from the main axis, the third arc groove is provided adjacent to the first arc groove, and the depth of the third arc groove is less than the depth of the fourth arc groove. The first fixing member may also cover the third arc groove, and a third protrusion may be provided on the side of the first fixing member facing the base, a third track groove is formed between the surface of the third protrusion and the groove surface of the third arc groove, and the portion of the first rotating shaft or the second rotating shaft that exceeds the first connecting member is accommodated in the third track groove, thereby limiting the movement track of the first rotating shaft or the second rotating shaft through the third track groove, so that when the rotating shaft mechanism is in the expanded state or the closed state, the position of the first rotating shaft or the second rotating shaft is also relatively stable, and the restraining effect of the first track groove on the first connecting member can further improve the stability of the first swing arm and the first support arm that move synchronously with the first connecting member.

[0020] Similarly, a fourth arc groove may be provided on a side of the base facing away from the first side of the main axis, the fourth arc groove is provided adjacent to the second arc groove, and the depth of the fourth arc groove is less than the depth of the second arc groove. The second fixing member may also cover the fourth arc groove, and a fourth protrusion may be provided on the side of the second fixing member facing the base, a fourth track groove is formed between the surface of the fourth protrusion and the groove surface of the fourth arc groove, and the portion of the third rotating shaft or the fourth rotating shaft that exceeds the second connecting member is accommodated in the fourth track groove, thereby limiting the movement track of the third rotating shaft or the fourth rotating shaft through the fourth track groove, so that when the rotating shaft mechanism is in the expanded state or the closed state, the position of the third rotating shaft or the fourth rotating shaft is also relatively stable, and the restraining effect of the second track groove on the second connecting member can further improve the stability of the second swing arm and the second support arm that move synchronously with the second connecting member.

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

[0022] In some embodiments, the main shaft may also include a third fixing member, which covers the fifth arc groove and the sixth arc groove, and the third fixing member has a fifth protrusion arranged toward the fifth arc groove and a sixth protrusion toward the sixth arc groove, and at least a portion of the first arc-shaped rotating block is located between the fifth protrusion and the fifth arc groove, thereby limiting the first arc-shaped rotating block between the third fixing member and the base, thereby improving the rotational stability of the first arc-shaped rotating block relative to the main shaft; similarly, at least a portion of the second arc-shaped rotating block is located between the sixth protrusion and the sixth arc-shaped rotating groove, thereby limiting the second arc-shaped rotating block between the third fixing member and the base, thereby improving the rotational stability of the second arc-shaped rotating block relative to the main shaft.

[0023] In some embodiments, there may be two first arc-shaped rotating blocks, and the two first arc-shaped rotating blocks may be arranged at intervals along the axial direction of the rotating shaft mechanism. Correspondingly, there may also be two fifth arc-shaped grooves, and the two fifth arc-shaped grooves may also be arranged at intervals along the axial direction of the rotating shaft mechanism. The two first arc-shaped rotating blocks may be respectively accommodated in the two fifth arc-shaped grooves, and each first arc-shaped rotating block may slide along the groove surface of the corresponding fifth arc-shaped groove. Through the rotational cooperation between the two groups of rotating blocks and the 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, and the two second arc-shaped rotating blocks can be arranged at intervals along the axial direction of the rotating shaft mechanism. Correspondingly, there can also be two sixth arc-shaped grooves, and the two sixth arc-shaped grooves can also be arranged at intervals along the axial direction of the rotating shaft mechanism. The two second arc-shaped rotating blocks can be respectively accommodated in the two sixth arc-shaped grooves, and each second arc-shaped rotating block can slide along the groove surface of the corresponding sixth arc-shaped groove. Through the rotational cooperation between the two groups of rotating blocks and the arc-shaped grooves, the motion stability of the second swing arm relative to the main shaft can be effectively improved.

[0025] In some embodiments, the number of first connectors may be multiple, and the multiple first connectors are arranged along the axial direction of the rotating shaft mechanism, and each first connector may be rotatably connected to the first swing arm and the first support arm respectively. Along the axial direction of the rotating shaft mechanism, the multiple first connectors may constrain the mutual pulling movement of the first swing arm and the first support arm at multiple positions, thereby effectively improving the speed uniformity during the rotation of the first swing arm and the first support arm, and further improving the smoothness of the mutual pulling movement of the first swing arm and the first support arm. Similarly, the number of second connectors may be multiple, and the multiple second connectors are arranged along the axial direction of the rotating shaft mechanism, and each second connector may be rotatably connected to the second swing arm and the second support arm respectively. Along the axial direction of the rotating shaft mechanism, the multiple second connectors may constrain the mutual pulling movement of the second swing arm and the second support arm at multiple positions, thereby effectively improving the speed uniformity during the rotation of the second swing arm and the second support arm, and further improving the smoothness of the mutual pulling movement of the second swing arm and the second support arm.

[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. Among them, the first gear connecting rod includes a first gear and a first connecting rod, the second gear connecting rod includes a second gear and a second connecting rod, the first gear and the second gear are respectively connected to the main shaft in rotation, and the first gear and the second gear are connected in transmission, the first connecting rod is connected in sliding connection with the first housing fixing frame, and the second connecting rod is connected in sliding connection with the second housing fixing frame. During the process of the rotating shaft mechanism being unfolded or closed, the rotation of the first housing fixing frame can drive the first gear connecting rod to rotate around the main shaft. Because the first gear of the first gear connecting rod is connected in transmission with 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 opposite directions, and the sliding of the second gear connecting rod drives the second housing fixing frame to rotate in the same direction, so that the synchronous rotation of the first housing fixing frame and the second housing fixing frame can be achieved.

[0027] In some embodiments, the first housing fixing frame may be provided with a first limiting wall, and the first limiting wall and the first swing arm are spaced apart along the axial direction of the rotating shaft mechanism. The rotating shaft mechanism may also include a first damping assembly, which is arranged 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 member. The first cam may be arranged on the side of the first swing arm facing the first limiting wall; the second cam may be arranged on the side of the first cam facing away from the first swing arm, and the second cam is arranged on the first housing fixing frame along the axial direction of the rotating shaft mechanism for sliding; the first elastic member may be limited between the second cam and the first limiting wall, thereby applying an elastic force to the second cam, so that the cam surface of the second cam abuts against the cam surface of the first cam, so that a damping force can be applied to the first swing arm during the expansion or closing process of the rotating shaft mechanism, thereby improving the movement stability of the first rotating assembly.

[0028] Similarly, the second housing fixing frame may be provided with a second limiting wall, and the second limiting wall and the second swing arm are spaced apart along the axial direction of the rotating shaft mechanism. The rotating shaft mechanism may also include a second damping assembly, which is arranged 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 member. The third cam may be arranged on the side of the second swing arm facing the second limiting wall; the fourth cam may be arranged on the side of the third cam away from the second swing arm, and the fourth cam is arranged on the second housing fixing frame along the axial direction of the rotating shaft mechanism for sliding; the second elastic member may be limited between the fourth cam and the second limiting wall, thereby applying an elastic force to the fourth cam, so that the cam surface of the fourth cam abuts against the cam surface of the third cam, so that the damping force can be applied to the second swing arm during the expansion or closing process of the rotating shaft mechanism, thereby improving the movement stability of the second rotating assembly.

[0029] In some embodiments, the first shell fixing frame may be provided with a first limiting groove arranged along the axial direction of the rotating shaft mechanism, the first limiting groove has a first opening arranged toward the first swing arm, and the bottom wall of the first limiting groove arranged opposite to the side where the first opening is located can form a first limiting wall; the first elastic member can be arranged in the first limiting groove, and the second cam is at least partially arranged in the first limiting groove, and the cam surface of the second cam can abut against the cam surface of the first cam through the first opening, so that the moving direction of the second cam driven by the first elastic member can be limited by the first limiting groove, thereby improving the structural stability and reliability of the first damping assembly. The second shell fixing frame can 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 arranged toward the second swing arm, and the bottom wall of the second limiting groove and the side opposite to the second opening can form a second limiting wall; the second elastic member can be arranged in the second limiting groove, and the fourth cam is at least partially arranged in the second limiting groove, and the cam surface of the fourth cam can abut against the cam surface of the third cam through the second opening, so that the moving direction of the fourth cam driven by the second elastic member can be limited by the second limiting groove, thereby improving the structural stability and reliability of the second damping assembly.

[0030] In the second aspect, the present application also provides an electronic device, which includes a first shell, a second shell, a flexible display screen and a hinge mechanism of the first aspect, wherein the first shell and the second shell are respectively arranged on opposite sides of the hinge mechanism, the first shell fixing frame is fixedly connected to the first shell, and the second shell fixing frame is fixedly connected to the second shell. The flexible display screen continuously covers the first shell, the second shell and the hinge mechanism, and the flexible display screen is fixedly connected to the first shell and the second shell. When the electronic device is in the unfolded state, the hinge mechanism, the first shell and the second shell jointly play the role of flattening the flexible display screen, thereby ensuring the integrity of the shape of the electronic device in the unfolded state. In the process of the electronic device changing from the unfolded state to the closed state, the two shells rotate towards each other to drive the flexible display screen to rotate, which can effectively avoid deformation of the flexible display screen to reduce the risk of damage to the flexible display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A partial exploded view of an electronic device in a closed state provided by an embodiment of the present application;

[0032] Figure 2 A partial exploded view of an electronic device provided in an embodiment of the present application in an unfolded state;

[0033] Figure 3 A schematic diagram of the structure of the rotating shaft mechanism provided in an embodiment of the present application;

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

[0035] Figure 5 A schematic diagram of a partial structure of the rotating shaft mechanism provided in an embodiment of the present application when the electronic device is in an unfolded state;

[0036] Figure 6 A schematic diagram of the structure of the rotating shaft mechanism provided in an embodiment of the present application when the electronic device is in an unfolded state;

[0037] Figure 7 A schematic diagram of the structure of the rotating shaft mechanism provided in an embodiment of the present application when the electronic device is in a closed state;

[0038] Figure 8 An exploded view of the main shaft provided in an embodiment of the present application;

[0039] Fig. 9 A schematic diagram of the structure of a first connecting member provided in an embodiment of the present application;

[0040] Fig.10 A schematic diagram of the structure of a first swing arm provided in an embodiment of the present application;

[0041] Fig.11 A schematic diagram of the structure of a first support arm provided in an embodiment of the present application;

[0042] Fig.12 A schematic diagram of a cross-sectional structure of a rotating shaft mechanism provided in an embodiment of the present application when the electronic device is in an unfolded state;

[0043] Fig.13 Another schematic diagram of a cross-sectional structure of the rotating shaft mechanism provided in an embodiment of the present application when the electronic device is in an unfolded state;

[0044] Fig.14 Another schematic diagram of a cross-sectional structure of the rotating shaft mechanism provided in an embodiment of the present application when the electronic device is in a closed state;

[0045] Fig.15 Another schematic diagram of a cross-sectional structure of the rotating shaft mechanism provided in an embodiment of the present application when the electronic device is in an unfolded state;

[0046] Fig.16 Another schematic diagram of a cross-sectional structure of the rotating shaft mechanism provided in an embodiment of the present application when the electronic device is in a closed state;

[0047] Fig.17 Another schematic diagram of a cross-sectional structure of the rotating shaft mechanism provided in an embodiment of the present application when the electronic device is in an unfolded state;

[0048] Fig.18 Another schematic diagram of a cross-sectional structure of the rotating shaft mechanism provided in an embodiment of the present application when the electronic device is in a closed state;

[0049] Fig.19 Another schematic diagram of a cross-sectional structure of the rotating shaft mechanism provided in an embodiment of the present application when the electronic device is in an unfolded state;

[0050] Fig. 20 Another schematic diagram of a cross-sectional structure of the rotating shaft mechanism provided in an embodiment of the present application when the electronic device is in a closed state;

[0051] Fig.21 Another partial structural exploded diagram of the rotating shaft mechanism provided in an embodiment of the present application.

[0052] Reference numerals:

[0053] 1-rotating shaft mechanism; 1a-bearing surface of the rotating shaft mechanism; 11-rotating module; 111-first rotating assembly; 1111-first swing arm;

[0054] 11111-first arc-shaped rotating block; 11112-first sliding block; 1112-first supporting arm; 11121-first sub-supporting arm;

[0055] 1113 - first rotating member; 11131 - first arc surface; 11132 - second arc surface; 1114 - first rotating shaft;

[0056] 1115 - second rotating shaft; 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 sliding block;

[0058] 1122 - second support arm; 11221 - first sub-support arm; 1123 - second connecting member; 11231 - third arc surface;

[0059] 11232 - fourth arc surface; 1124 - third rotation axis; 1125 - fourth rotation axis; 1126 - second rotation arm;

[0060] 11261 - second hinge axis; 11262 - second groove;

[0061] 113-first housing fixing frame; 1131-first slot; 11311-first slideway; 1132-first slideway;

[0062] 1133-first limiting member; 11331-first protruding portion; 1134-third sliding groove; 1135-first limiting arm;

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

[0064] 114-second housing fixing frame; 1141-second slot; 11411-second slideway; 1142-second slideway;

[0065] 1143 - second stopper; 11431 - second protruding portion; 1144 - fourth sliding groove; 1147 - second through hole;

[0066] 12-spindle; 12a-first surface; 1201-first track groove; 1202-second track groove; 1203-third track groove;

[0067] 121-base; 1211-first arc groove; 1212-second arc groove; 1213-third arc groove; 1214-fourth arc groove;

[0068] 1215 - fifth arc groove; 1216 - sixth arc groove; 1217 - first mounting groove; 1218 - second mounting groove;

[0069] 122-first fixing member; 1221-first protrusion; 1223-third protrusion; 123-second fixing member; 124-third fixing member;

[0070] 1241-fifth protrusion; 125-fourth fixing member;

[0071] 13-synchronizing assembly; 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 member; 14131 - spring; 14132 - first guide column;

[0075] 142-second damping assembly;

[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. DETAILED DESCRIPTION

[0079] In order to make the purpose, technical scheme and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. However, the example implementation can be implemented in various forms and should not be construed as being limited to the implementations set forth herein. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted. The words expressing position and direction described in the embodiments of the present application are all illustrated by taking the accompanying drawings as examples, but changes may be made as needed, and the changes made are all included in the scope of protection of the present application. The drawings of the embodiments of the present application are only used to illustrate the relative position relationship and do not represent the true proportion.

[0080] It should be noted that specific details are described in the following description to facilitate understanding of the present application. However, the embodiments of the present application can be implemented in a variety of other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the embodiments of the present application. Therefore, the present application is not limited to the specific implementation methods disclosed below.

[0081] refer to Figure 1 As shown, Figure 1The electronic device provided in the embodiment of the present application can be a mobile phone, a personal digital assistant (PDA), a notebook computer, a tablet computer or other foldable devices. Figure 1 The electronic device of the illustrated embodiment is described by taking a mobile phone as an example. The electronic device may include a hinge mechanism 1, a flexible display screen 4, and two shells. For ease of description, the two shells may be named a first shell 2 and a second shell 3, respectively. The first shell 2 and the second shell 3 are located on both sides of the hinge mechanism 1 and may rotate around the hinge mechanism 1. When the electronic device is in use, it may be closed and unfolded according to different usage scenarios.

[0082] According to an embodiment of the present application, the electronic device may be an outward folding electronic device. When the outward folding electronic device is in a closed state or in a process of switching between a closed state and an unfolded state, the flexible display screen 4 is always located outside the electronic device. Figure 1 The figure shows the relative position relationship between the hinge mechanism 1 and the two shells when the electronic device is in a closed state.

[0083] Figure 2 This is a partial exploded view of an electronic device in an unfolded state provided by an embodiment of the present application. Figure 1 and Figure 2 The hinge mechanism 1, the first shell 2, and the second shell 3 respectively have support surfaces arranged toward the flexible display screen 4, and the flexible display screen 4 can continuously cover the bearing surface 1a of the hinge mechanism 1, the support surface 2a of the first shell 2, and the support surface 3a of the second shell 3. The hinge mechanism 1 is arranged corresponding to the bendable part of the flexible display screen 4, and the flexible display screen 4 can be fixedly connected to the support surface 2a of the first shell 2 and the support surface 3a of the second shell 3, and the connection method can be but not limited to bonding. When the electronic device is in the unfolded state, the support surface 1a of the hinge mechanism 1, the support surface 2a of the first shell 2, and the support surface 3a of the second shell 3 can be connected to form a flat support surface, so that the hinge mechanism 1, the first shell 2, and the second shell 3 can play a role in flatly supporting the flexible display screen 4.

[0084] In the embodiment of the present application, the first shell 2 and the second shell 3 are composed of Figure 1 The closed state shown to Figure 2 During the reverse rotation of the unfolded state shown, or by Figure 2 The expanded state shown to Figure 1 During the relative rotation of the closed state shown in FIG. 1 , the flexible display screen 4 can be bent or flattened along with the first shell 2 and the second shell 3. In addition, it can be understood that the electronic device is composed of Figure 2 The expanded state shown to Figure 1The closed state shown, or by Figure 1 The closed state shown to Figure 2 The unfolded state process shown in FIG. 1 is the process in which the first housing 2 and the second housing 3 rotate around the hinge mechanism 1. The hinge mechanism 1 is a key functional component in a foldable electronic device, and it can be arranged corresponding to the bendable part of the flexible display screen 4. Figure 2 The expanded state shown and in Figure 1 The support of the foldable part of the flexible display screen 4 in the closed state shown plays an important role.

[0085] refer to Figure 3 As shown, the hinge 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 hinge mechanism 1, and can serve as a bearing component of the rotating module 11. In addition, the main shaft 12 has a first surface 12a disposed toward the flexible display screen, and the first surface 12a can be formed as a part of the bearing surface of the hinge mechanism 1. In the present application, the axial direction of the hinge mechanism 1 can be understood as the extension direction of the axis around which the first shell 2 and the second shell 3 rotate around the hinge mechanism 1. The number of the rotating modules 11 can be one or more. In the case where the hinge mechanism 1 includes a plurality of rotating modules 11, the plurality of rotating modules 11 can be arranged at intervals along the axial direction of the hinge mechanism 1. The first shell 2 and the second shell 3 are rotatably connected by a plurality of rotating modules 11, which can effectively improve the stability of the first shell 2 and the second shell 3 of the electronic device in rotation relative to the hinge 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 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 corresponding to each rotating module 11, so that each rotating module 11 uses the corresponding main shaft 12 as a bearing component.

[0087] Figure 4 for Figure 3 A partial structural exploded view of the rotating shaft mechanism 1 is shown in FIG. Figure 4 As shown, in the embodiment of the present 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 can rotate relative to the main shaft 12 respectively. In addition, in each rotating module 11, the first rotating component 111 and the second rotating component 112 can be one or more, and the number of the two can be equal or different. When there are multiple first rotating components 111 or second rotating components 112, the first rotating components 111 and the second rotating components 112 can be staggered along the axial direction of the rotating shaft mechanism 1.

[0088] In addition, the hinge mechanism 1 may further include a first housing fixing frame 113 and a second housing fixing frame 114, and the first housing fixing frame 113 and the second housing fixing frame 114 are respectively arranged on opposite sides of the main shaft 12. The first housing fixing frame 113 may be used to be fixedly connected with the first housing 2, and the second housing fixing frame 114 may be used to be fixedly connected with the second housing 3. Moreover, the first housing bracket 113 may also be transmission-connected with the first rotating assembly 111, so that the first housing fixing frame 113 and the first housing 2 can also rotate relative to the main shaft 12; and the second housing 3 may also be transmission-connected with the second rotating assembly 112, so that the second housing fixing frame 114 and the second housing 3 can also 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, and then 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. Thus, by properly designing the structures of the first rotating assembly 111 and the second rotating assembly 112, the movement trajectories of the first shell 2 and the second shell 3 can be limited, so that the first shell 2 and the second shell 3 can be opened and closed in a set rotation manner.

[0089] Figure 5 This is a partial structural diagram of the rotating shaft mechanism 1 provided in the embodiment of the present application when the electronic device is unfolded. Figure 4 and Figure 5 As shown, in the embodiment of the present application, 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 arranged on opposite sides of the main shaft 12, the first swing arm 1111 may be slidably connected to the first housing fixing frame 113, and the first support arm 1112 may be 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 connecting member 1113 is rotatably connected to the first support arm 1112, so that the first swing arm 1111 and the first support arm 1112 are mutually pulled through the first connecting member 1113, thereby realizing the linkage between the first housing fixing frame 113 and the second housing fixing frame 114.

[0090] Figure 6 This is a schematic diagram of the structure of the rotating shaft mechanism 1 provided in an embodiment of the present application when the electronic device is in an unfolded state. Figure 7 This is a schematic diagram of the structure of the rotating shaft mechanism 1 provided in the embodiment of the present application when the electronic device is in a closed state. 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, so that the first track groove 1201 is used to limit the movement track of the first connecting member 1113. When the electronic device switches 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 shell fixing frame 113 is located. Conversely, when the electronic device switches 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 shell fixing frame 114 is located.

[0091] Figure 8 This is an exploded view of the main shaft 12 provided in the embodiment of the present application. Figure 8 As shown, the main shaft 12 may include a base 121 and a first fixing member 122, wherein one side surface of the base 121 may be used as the first side of the main shaft 12 for supporting the flexible display screen, and a side of the base 121 away from the first side of the main shaft may be provided with a first arc groove 1211, and the first fixing member 122 may be covered on the first arc groove 1211. Exemplarily, the first fixing member 122 may be fixed to the base 121 by screw connection or bonding. The first fixing member 122 has a first protrusion 1221 disposed toward the first arc groove 1211, and there is a gap between the surface of the first protrusion 1221 and the groove surface of the first arc groove 1211, and the gap may be used as a first track groove.

[0092] Combination Figures 6 to 8 As shown, during the unfolding and closing process of the electronic device, the first swing arm 1111 and the first support arm 1112 can rotate around the main axis 12. Because the first swing arm 1111 and the first support arm 1112 are pulled against each other through the first connecting member 1113, the first connecting member 1113 can also rotate relative to the surface of the first protrusion 1221 and the groove surface of the first arc groove 1211 during the movement in the first track groove 1201, so as to improve the movement smoothness of the first rotating assembly.

[0093] Fig. 9 This is a schematic diagram of the structure of the first connecting member 1113 provided in an embodiment of the present application. Fig. 9 As shown, in the embodiment of the present application, the first connecting member 1113 is generally a strip-shaped structure, and the widths of the two ends of the first connecting member 1113 may be different to reduce the risk of the first connecting member getting stuck in the first track groove. Exemplarily, the two ends of the first connecting member 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] For reference Figure 7 and Fig. 9As shown, in one embodiment, one end of the first connecting member 1113 close to the first arc surface 11131 is rotatably connected to the first swing arm 1111 , and one end of the first connecting member 1113 close to the second arc surface 11132 is rotatably connected to the first support arm 1112 .

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

[0096] It can be seen from the above description that the end where the second arc surface 11132 is located is the widest part of the first connecting member 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 connecting member 1113 is adapted to the first track groove 1201.

[0097] Please combine Figure 6 , Figure 7 and Fig. 9 , when the electronic equipment is in Figure 6 The closed state shown and Figure 7 In the unfolded state shown, the second arc surface 11132 of the first connecting member 1113 respectively abuts against the surface of the first protrusion 1221 and the groove surface of the first arc groove 1211, so that the surface of the first protrusion 1221 and the groove surface of the first arc groove 1211 limit the first connecting member 1113 to the first track groove 1201. In this way, when the electronic device is in the unfolded state and the closed state, the position of the first connecting member 1113 is relatively stable, and no virtual position shaking occurs, so that the hinge mechanism has higher reliability.

[0098] In some embodiments, the surface of the first protrusion 1221 may be an arc surface, the groove surface of the first arc groove 1211 may 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 surface of the first protrusion 1221 and the surface of the first arc-shaped groove 1211 can both be planes, in which case the first track groove 1201 is a straight line groove. Alternatively, the surface of the first protrusion 1221 and the surface of the first arc-shaped groove 1211 can also be other curved surfaces, in which case the first track groove 1201 formed is a curved groove of a corresponding shape.

[0100] In some embodiments of the present application, the spacing between the surface of the first protrusion 1221 and the groove surface of the first arc groove 1211 can be equal at all places, so that the first track groove 1201 is formed into a groove of equal width. In the process of the electronic device 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 arc surface 11132 of the first connecting member 1113, and the groove surface of the first arc groove 1211 and the second arc surface 11132 of the first connecting member 1113 are always in abutment. In this way, in the process of unfolding and closing the electronic device, the motion trajectory of the first connecting member 1113 can remain the same, which is conducive to improving the motion stability of the first connecting member 1113, and then improving the motion stability of the first rotating assembly.

[0101] It can be understood 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 groove 1211 is substantially equal to the diameter of the second arc surface 11132. In addition, considering the smoothness of the movement of the first connecting member 1113 in the first track groove 1201, a certain design gap can be reserved between the second arc surface 11132 and the surface of the first protrusion 1221 and / or the groove surface of the first arc groove 1211.

[0102] Of course, in some other embodiments of the present application, the movement trajectory of the first connecting member 1113 during the unfolding and closing process of the electronic device may also be different. In a specific implementation, when the electronic device moves 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; when the electronic device moves 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 spacing between the surface of the first protrusion 1221 and the groove surface of the first arc groove 1211 may not be equal, and the first trajectory groove 1201 is a non-uniform width groove.

[0103] Continue to refer Figure 6 , Figure 7 and Fig. 9As shown, the first rotating assembly also includes a first rotating shaft 1114 and a second rotating shaft 1115, and the axis of the first rotating shaft 1114 is parallel to and does not overlap with the axis of the second rotating shaft 1115. The first connecting member 1113 and the first swing arm 1111 can be rotatably connected through the first rotating shaft 1114, and the first connecting member 1113 and the first supporting arm 1112 can be rotatably connected through the second rotating shaft 1115, so that the first swing arm 1111 and the first supporting arm 1112 can achieve mutual pulling movement through the first connecting member 1113. In one implementation, when the end of the first connecting member 1113 close to 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. At this time, part of the surface of the first rotating shaft 1114 can be formed as the first arc surface 11131. This design is conducive to reducing the size of the first connecting member 1113, thereby reducing its occupied space in the rotating shaft mechanism. One end of the first connecting member 1113 close to the second arc surface 11132 may be provided with a hinge hole, and the second rotating shaft 1115 passes through the hinge hole.

[0104] In the embodiment of the present application, there may be multiple first connecting members 1113, 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 in the figure as an example, the two first connecting members 1113 are respectively connected to the first swing arm 1111 through the first rotating shaft 1114, and are respectively connected to the first support arm 1112 through 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 movement 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 the rotation process, thereby improving the smoothness of the mutual pulling movement 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, in the case where 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. At this time, the second rotating shaft 1115 can be respectively penetrated through the hinge holes of the two first connecting members 1113, so that the two first connecting members 1113 can be connected as a whole by using the second rotating shaft 1115, which can not only ensure the movement synchronization of the two first connecting members 1113, but also reduce the difficulty of installing the first connecting member 1113 in the rotating shaft mechanism.

[0106] For reference Figures 7 to 9In this embodiment, a third arc groove 1213 may be provided on a side of the base 121 away from the first side of the spindle 12. The third arc groove 1213 is disposed adjacent to the first arc groove 1211, and the depth of the third arc groove 1213 may be less than the depth of the first arc groove 1211. The first fixing member 122 may be disposed on the first arc groove 1211 and the third arc groove 1213 at the same time, and a third protrusion 1223 may be provided on the side of the first fixing member 122 facing the base 121. The third protrusion 1223 is opposite to the third arc groove 1213. At this time, the gap between the surface of the third protrusion 1223 and the groove surface of the third arc groove 1213 may form a third track groove 1203.

[0107] In some embodiments, the portion of the first rotating shaft 1114 that exceeds the first connecting member 1113 can be accommodated in the third track groove 1203, so as to limit the movement track of the first rotating shaft 1114 by using the third track groove 1203. In other embodiments, the portion of the second rotating shaft 1115 that exceeds the first connecting member can be accommodated in the third track groove 1203, and in this case, the third track groove 1203 is used to limit the movement track of the second rotating shaft 1115.

[0108] Taking the cooperation between the second rotating shaft 1115 and the third track groove 1203 as an example, in a specific implementation, the part of the second rotating shaft 1115 located between the two first connecting members 1113 can be accommodated in the third track groove 1203. Figure 6 The closed state shown and Figure 7 In the unfolded state shown, the surface of the second shaft 1115 is respectively in contact with the surface of the third protrusion 1223 and the groove surface of the third arc groove 1213, so that the surface of the third protrusion 1223 and the groove surface of the third arc groove 1213 limit the second shaft 1115 to the third track groove 1203. In this way, when the electronic device is in the unfolded state and the closed state, the position of the second shaft 1115 is also relatively stable. Combined with the restraining effect of the aforementioned first track groove 1201 on the first connecting member 1113, the embodiment of the present application 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 therewith, thereby further improving the reliability of the hinge mechanism 1.

[0109] Similar to the first track groove 1201, when the third track groove 1203 is specifically designed, the surface of the third protrusion 1223 can be an arc surface, the groove surface of the third arc groove 1213 can also be an arc surface, and the center of the surface of the third protrusion 1223 coincides with the center of the groove surface of the third arc groove 1213. It is worth mentioning that when the surface of the third protrusion 1223 and the surface of the first protrusion 1221 are both 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 distances between the surface of the third protrusion 1223 and the groove surface of the third arc groove 1213 can be equal at all places, so that the third track groove 1203 is formed into a groove of equal width. In the process of the electronic device 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 groove 1213 and the surface of the second rotating shaft 1115 are always in abutment state, so that in the process of unfolding and closing the electronic device, the movement track 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 groove 1213 is substantially equal to the diameter of the second shaft 1115. Considering the smoothness of the movement of the second shaft 1115 in the third track groove 1203, a certain design gap can be reserved between the surface of the second shaft 1115 and the surface of the third protrusion 1223 and / or the groove surface of the third arc groove 1213.

[0112] Fig.10 This is a schematic diagram of the structure of the first swing arm 1111 provided in the embodiment of the present application. Figure 4 and Fig.10 As shown, a first arc-shaped rotating block 11111 may be provided on one side of the first swing arm 1111 close to the base 121, and correspondingly, the base 121 may be provided with a fifth arc-shaped groove 1215, and the first arc-shaped block 11111 of the first swing arm 1111 may be accommodated in the fifth arc-shaped groove 1215, and may rotate along the arc-shaped surface of the fifth arc-shaped groove 1215, thereby realizing the rotation of the first swing arm 1111 around the main shaft 12. In the embodiment of the present application, the rotation axis of the first swing arm 1111 is arranged along the axial direction of the rotating shaft mechanism 1. Among them, the first arc-shaped rotating block 11111 may be a circular arc-shaped rotating block, and the fifth arc-shaped groove 1215 may be a circular arc-shaped groove. In this case, the surface of the first arc-shaped rotating block 11111 for contacting with 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, and the circles of the two circular arc surfaces overlap.

[0113] The above-mentioned arc groove and arc rotating block cooperate to realize the rotation around an axis determined by a virtual position, which can be called a virtual axis rotation connection method. That is, the two rotating entities do not directly realize relative rotation by a physical pin shaft, but realize the rotation connection through the above-mentioned matching structure. This connection method is conducive to reducing the volume of the main shaft 12 and facilitating the miniaturization design of the rotating shaft mechanism 1. It is easy to understand that for an outward folding electronic device, when the first swing arm 1111 is rotationally connected with the main shaft 12 by means of a virtual axis, the axis of the first swing arm 1111 rotating around the main shaft 12 is located on the side of the main shaft 12 away from the flexible display screen.

[0114] For reference Figure 8 and Fig.10 As shown, the main shaft 12 can also include a third fixing member 124, which can be covered on the fifth arc-shaped groove 1215, and the third fixing member 124 has a fifth protrusion 1241 arranged toward 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 can 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 enhance 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 groove 1215 is an arc surface, the portion of the surface of the fifth protrusion 1241 that is used to contact the first arc 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 rotating block 11111 facing the fifth protrusion 1241 can be a plane or an arc surface, as long as the first arc rotating block 11111 can rotate relative to the fifth protrusion 1241.

[0116] In a specific embodiment, there can be two first arc-shaped rotating blocks 11111, and the two first arc-shaped rotating blocks 11111 can be arranged at intervals along the axial direction of the rotating shaft mechanism. Correspondingly, there can also be two fifth arc-shaped grooves 1215, and the two fifth arc-shaped grooves 1215 can also be arranged at intervals along the axial direction of the rotating shaft mechanism. The two first arc-shaped rotating blocks 11111 can be respectively accommodated 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 cooperation between the two groups of rotating blocks and the arc-shaped grooves, the motion stability of the first swing arm 1111 relative to the main shaft 12 can be effectively improved.

[0117] For reference Fig. 9 and Fig.10As shown, in the embodiment of the present application, the side of the first connecting member 1113 close to 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. At this time, the two first arc-shaped rotating blocks 11111 are respectively provided with hinge holes a1, one end of the first rotating shaft 1114 is fixedly connected to the first connecting member 1113, and the other end is rotatably arranged in the hinge hole a1, so that when the first swing arm 1111 rotates around the main axis, the first connecting member 1113 is pulled to move in the first track groove, and the first swing arm 1111 and the first connecting member 1113 are rotatably connected.

[0118] Fig.11 This is a schematic diagram of the structure of the first support arm provided in the embodiment of the present application. Fig. 9 and Fig.11 As shown, in the embodiment of the present application, the first support arm 1112 is provided with a hinge hole b1, and the second rotating shaft 1115 can be provided through the hinge holes of the first support arm 1112 and the first connecting member 1113, so as to rotatably connect the first support arm 1112 with the first connecting member 1113. In addition, the first support arm 1112 may include two first sub-support arms 11121, and the two first sub-support arms 11121 are arranged at intervals along the axial direction of the rotating shaft mechanism. In this case, the side of the first connecting member 1113 close to the first support arm 1112 can be located between the two first sub-support arms 11121, so as to further improve the structural compactness of the first rotating assembly. The two first sub-support arms 11121 are respectively provided with hinge holes b, and the second rotating shaft 1115 is arranged in the hinge holes of the two first sub-support arms 11121 at both ends beyond the first connecting member 1113, so as to improve the stability of the relative movement between the first connecting member 1113 and the first support arm 1112.

[0119] For reference Figure 4 and Fig.11 , one end of the first support arm 1112 close to the second housing fixing frame 114 is rotatably connected to the second housing fixing frame 114. In a specific implementation, a hinge hole c1 is provided at one end of the first support arm 1112 close to the second housing fixing frame 114, and correspondingly, a hinge hole d1 is provided on the second housing fixing frame 114, and the first support arm 1112 and the second housing fixing frame 114 can be rotatably connected via a rotating shaft penetrating through the hinge hole c1 and the hinge hole d1.

[0120] Fig.12 This is a schematic cross-sectional view of the structure of the rotating shaft mechanism 1 provided in the embodiment of the present application when the electronic device is unfolded. Figure 4 and Fig.12As shown, the first housing fixing frame 113 is provided with a first slot 1131, and the first slot 1131 extends along the first direction. One end of the first swing arm 1111 away from the main shaft 12 can be arranged in the first slot 1131. During the process of the first swing arm 1111 rotating around the main shaft 12, the first swing arm 1111 can slide in the first slot 1131 along the first direction. In addition, the first swing arm 1111 can also swing slightly relative to the first housing fixing frame 113 during the sliding process, thereby reducing the risk of the first swing arm 1111 getting stuck in the first slot 1131 and improving the movement coordination of the first swing arm 1111 and the first housing fixing frame 113. Among them, the first direction is the direction in which the first housing fixing frame 113 approaches or moves away from the main shaft 12. It is easy to understand that the swinging direction of the first swing arm 1111 relative to the first housing fixing frame 113 is opposite to the rotation direction of the first swing arm 1111 relative to the main shaft 12.

[0121] In order to prevent the first swing arm 1111 from falling off from the first slot 1131, a first slide 11311 is provided on the slot wall of the first slot 1131, and accordingly, a first slider 11112 can be provided on the side of the first swing arm 1111, and the first slider 11112 is assembled in the first slide 11311. In this way, on the one hand, the first swing arm 1111 can be limited in the first slot 1131, and on the other hand, the first slide 11311 can be used to provide guidance for 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] In addition, along the first direction, the thickness of each position of the first slideway 11311 can be kept roughly the same, and the first slider 11112 can be a structure with a gradually changing 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 roughly equal to the thickness of the first slideway 11311, then the thickness of the end of the first slider 11112 close to the main shaft 12 is obviously less than the thickness of the first slideway 11311, so that after the first slider 11112 is assembled into the first slideway 11311, the end of the first slider 11112 away from the main shaft 12 can be against the wall of the first slideway 11311. A certain gap can be generated between the end of the first slider 11112 close to the main shaft 12 and the wall of the first slideway 11311, which can reduce the risk of the first slider 11112 shaking in the first slideway 11311 and realize the swing of the first slider 11112 in the first slideway 11311, that is, on the premise of realizing the rotation of the first swing arm 1111 relative to the first shell fixing frame 113, reduce the risk of the first swing arm 1111 shaking, thereby further improving the movement stability of the first swing arm 1111.

[0123] Fig.13This is another cross-sectional structural schematic diagram of the rotating shaft mechanism 1 provided in an embodiment of the present application when the electronic device is in an unfolded state. Fig.14 This is another cross-sectional structural diagram of the rotating shaft mechanism 1 provided in the embodiment of the present application when the electronic device is in a closed state. Figure 4 , Fig.13 and Fig.14 As shown, in the embodiment of the present application, in addition to the above structure, the first rotating assembly 111 may also include a first rotating arm 1116, which is rotatably connected to the main shaft 12, and 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 first surface of the rotation axis of the first swing arm 1111 close to the main shaft 12, or 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. In addition, the first rotating arm 1116 is slidably connected to the first shell fixing frame 113, and there is only relative sliding between the first rotating arm 1116 and the first shell fixing frame 113. In this case, the rotation angle of the first shell 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 shortened, the overlap between the first rotating arm 1116 and the first shell fixing frame 113 along the first direction will also increase, thereby effectively increasing the stability of the first shell fixing frame 113 relative to the main axis movement.

[0124] In this embodiment, the first rotating arm 1116 has a first hinge shaft 11161 at one end close to the base 121, and the first rotating arm 1116 can be rotatably connected to the base 121 through the first hinge shaft 11161. At this time, the axis of the first hinge shaft 11161 is the rotation axis of the first rotating arm 1116. This method of rotation connection through 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 one side of the base 121 close to the first shell fixing frame 113, and a hinge hole is provided on the groove wall of the first mounting groove 1217. The end of the first rotating arm 1116 close to the base 121 is located in the first mounting groove 1217, and the first hinge shaft 11161 is rotatably set in the hinge hole, so that the first rotating arm 1116 can be rotatably connected to the base 121 through the first hinge shaft 11161.

[0125] Continue to refer Figure 4 , Fig.13 and Fig.14, the first housing fixing frame 113 may be provided with a first slide groove 1132, the first slide groove 1132 extending along the first direction, and the first rotating arm 1116 is slidably disposed in the first slide groove 1132 at one end close to the first housing fixing frame 113. Similarly, the groove wall of the first slide groove 1132 may be provided with a third slideway, and the end of the first rotating arm 1116 along the axial direction of the rotating shaft mechanism 1 may be located in the third slideway, so that the first rotating arm 1116 is limited by the third slideway and a guide is provided for the sliding of the first rotating arm 1116. Exemplarily, the height of the third slideway may be substantially equal to the thickness of the first rotating arm 1116, so as to reduce the risk of the first rotating arm 1116 shaking or rotating in 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 a side of the first rotating arm 1116 facing the flexible display screen. The first housing fixing frame 113 includes a first stopper 1133, which may be provided on a side of the first housing fixing frame 113 facing the flexible display screen, and the first stopper 1133 has a first protrusion 11331 provided away from the flexible display screen. The first housing fixing frame 113 has a first through hole 1137 connected to the first slide groove 1132 on a side facing the flexible display screen, and the first protrusion 11331 may 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, so that the first protrusion 11331 may be used to limit the sliding of the first rotating arm 1116, thereby reducing the risk of the first rotating arm 1116 slipping off in the first slide groove 1132 and improving the movement reliability of the first rotating arm 1116. In addition, a certain gap may be reserved 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 and thus affecting the sliding smoothness of the first rotating arm 1116 .

[0127] Fig.15 This is another cross-sectional structural schematic diagram of the rotating shaft mechanism 1 provided in an embodiment of the present application when the electronic device is in an unfolded state. Fig.16 This is another cross-sectional structural diagram of the rotating shaft mechanism 1 provided in the embodiment of the present application when the electronic device is in a closed state. Figures 13 to 16As shown, based on the hinge mechanism 1 provided in the above-mentioned embodiment of the present application, during the process of the electronic device changing from the unfolded state to the closed state, the first shell fixing frame 113 and the second shell fixing frame 114 move toward each other, and the first shell 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 utilizes the sliding connection relationship with the first shell fixing frame 113 to restrict the rotation angle of the first shell fixing frame 113, and the first swing arm 1111 slides along the groove surface of the fifth arc 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. Because 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 process of moving toward the first swing arm 1111 in the first track groove 1201 of the main shaft 12, thereby driving the second shell fixing frame 114 to rotate clockwise around the main shaft 12 through the first support arm 1112. During the process of the electronic device moving from a closed state to an unfolded state, the first shell fixing frame 113 and the second shell fixing frame 114 move in opposite directions, and the first shell fixing frame 113 drives the first rotating arm 1116 and the first swing arm 1111 to rotate clockwise around the main axis 12. The first rotating arm 1116 can restrict the rotation angle of the first shell fixing frame 113 during the rotation around the first hinge axis, and the first swing arm 1111 can drive the first connecting member 1113 to move toward the first support arm 1112 in the first track groove 1201 of the main axis 12, thereby driving the first support arm 1112 to rotate counterclockwise around the main axis 12, so as to drive the second shell fixing frame 114 to rotate counterclockwise around the main axis 12 through the first support arm 1112.

[0128] In order to ensure the stability of some existing hinge mechanisms, it is necessary to increase the thickness of the rotating assembly connected to the main shaft, which will make the main shaft and the hinge mechanism very thick. If the thickness is forcibly reduced, the strength of the rotating assembly will be easily weakened, which will greatly affect the reliability of the hinge mechanism and reduce the life of the electronic device. The above-mentioned hinge mechanism of the present application has a streamlined structure. Through the above-mentioned structural relationship, the first connecting member 1113 with a relatively small volume can be used to shuttle in the first track groove 1201 of the main shaft 12. Therefore, the first track groove 1201 also has a small size that is compatible with the first connecting member 1113. In this way, the main shaft 12 can also meet the movement requirements of the first connecting member 1113 with a smaller thickness and width. This can not only achieve the effect of reducing the size of the main shaft 12, but also maintain the reliability of the hinge mechanism 1. In addition, since the distance between the rotation axis of the first rotating arm 1116 and the flexible display screen is shortened, when the width of the main shaft 12 is reduced, the overlap between the first rotating arm 1116 and the first shell fixing frame 113 is still large enough, thereby reducing the virtual swing angle of the first shell fixing frame 113 relative to the main shaft 12 and improving the stability of the hinge mechanism 1.

[0129] In addition, since the first connecting member 1113 can move along a set track in the first track groove 1201, it is possible to avoid uncontrolled movement of the first connecting member 1113 during the entire closing and unfolding process, thereby avoiding random movement of the first shell fixing frame 113. In combination with the restraining effect of the first rotating arm 1116 on the first shell fixing frame 113, the structural and motion stability of the entire hinge mechanism 1 can be effectively improved. In some cases, by reasonably designing the first track groove 1201, the outer tangent of the hinge mechanism 1 can also maintain a constant length during the entire folding and unfolding process, thereby allowing the flexible display screen covering the surface of the hinge mechanism 1 to basically maintain a constant length. In this way, squeezing or pulling the flexible display screen can be effectively avoided, thereby improving the structural reliability of the flexible display screen, and thereby improving the structural reliability of the electronic device.

[0130] You can continue to refer to Figure 4 and Figure 5, similar to the structure of the first rotating assembly 111, when the second rotating assembly 112 is specifically arranged, 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 arranged on opposite sides of the main shaft 12, the second swing arm 1121 may be slidably connected to the second housing fixing frame 114, and the second support arm 1122 may be 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, the second connecting member 1123 is rotatably connected to the second swing arm 1121, and the second connecting member 1123 is rotatably connected to the second support arm 1122, so that the second swing arm 1121 and the second support arm 1122 are mutually pulled through 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] For reference 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, so that the track of the second connecting member 1123 is limited by the second track groove 1202. When the electronic device switches from the unfolded state to the closed state, the second connecting member 1123 may move in the second track groove 1202 toward the side where the second housing fixing frame 114 is located. Conversely, when the electronic device switches from the closed state to the unfolded state, the second connecting member 1123 may move in 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 second arc groove 1212 may be provided on one side of the base 121 away from the first side of the spindle. In addition, the spindle 12 may further include a second fixing member 123, which may be covered on the second arc groove 1212. The second fixing member 123 has a second protrusion disposed toward the second arc groove 1212, and there is a gap between the surface of the second protrusion and the groove surface of the second arc groove 1212, and the gap may serve as a second track groove.

[0133] refer to Fig. 9As shown, the second connecting member 1123 is generally a strip-shaped structure, and the widths of the two ends of the second connecting member 1123 may be different. Exemplarily, the two ends of the second connecting member 1123 respectively have a third arc surface 11231 and a fourth arc surface 11232, and the diameter of the third arc surface 11231 is smaller than the diameter of the fourth arc surface 11232. In one embodiment, the end of the second connecting member 1123 close to the third arc surface 11231 is rotatably connected to the second swing arm, and the end of the second connecting member 1123 close to the fourth arc surface 11232 is rotatably connected to the second support arm. Since the end where the fourth arc surface 11232 is located is the widest part of the second connecting member 1123, the second track groove can be designed according to the size of the fourth arc surface 11232, or the fourth arc surface 11232 can be designed according to the size of the second track groove, so that the second connecting member 1123 is adapted to the second track groove.

[0134] Please refer again Figure 4 The fourth arc surface 11232 of the second connecting member 1123 respectively abuts against the surface of the second protrusion and the groove surface of the second arc groove 1212, so that the surface of the second protrusion and the groove surface of the second arc groove 1212 limit the second connecting member 1123 to the second track groove, so that when the electronic device is in the unfolded state and the closed state, the position of the second connecting member 1123 is relatively stable, and no virtual position shaking will occur, so that the hinge mechanism 1 has higher reliability.

[0135] In some embodiments, the spacing between the surface of the second protrusion and the groove surface of the second arc groove 1212 can be equal at all places, so that the second track groove is formed into a groove of equal width. In the process of the electronic device 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 arc surface 11232, and the groove surface of the second arc groove 1212 and the fourth arc surface 11232 are always in abutment, so that in the process of unfolding and closing the electronic device, the movement trajectory of the second connecting member 1123 can remain the same.

[0136] In some 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, when the electronic device is in 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; when the electronic device is in 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] For reference Figure 4 and Fig. 9The second rotating assembly 112 further includes a third rotating shaft 1124 and a fourth rotating shaft 1125. The axis of the third rotating shaft 1124 is parallel to and does not overlap 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 the embodiment of the present application, the number of the second connecting members 1123 can be multiple, and the multiple second connecting members 1123 are distributed along the axial direction of the rotating shaft mechanism 1. In a specific implementation, the multiple second connecting members 1123 are respectively rotatably connected to the second swing arm 1121 through the third rotating shaft 1124, and are respectively rotatably connected to the second support arm 1122 through the fourth rotating shaft 1125.

[0139] In one implementation, the second connecting member 1123 and the third rotating shaft 1124 are arranged in a one-to-one correspondence. For example, when there are two second connecting members 1123, the third rotating shaft 1124 can be located on the side of the corresponding second connecting member 1123 facing away from the other second connecting member 1123. The two second connecting members 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 penetrated through the hinge holes of the two second connecting members 1123, so that the two second connecting members 1123 can be connected as one by the fourth rotating shaft 1125.

[0140] For reference Figure 8 and Fig. 9 A fourth arc groove 1214 may be provided on a surface of the base 121 away from the first surface of the spindle 12. The fourth arc groove 1214 is provided adjacent to the second arc groove 1212, and the depth of the fourth arc groove 1214 may be less than the depth of the second arc groove 1212. The second fixing member 123 may be provided on the second arc groove 1212 and the fourth arc groove 1214 at the same time, and a fourth protrusion may be provided on the side of the second fixing member 123 facing the base 121. The fourth protrusion is opposite to the fourth arc groove 1214. At this time, the gap between the surface of the fourth protrusion and the groove surface of the fourth arc groove 1214 may form a fourth track groove.

[0141] In one embodiment, the portion of the third rotating shaft 1124 that exceeds the second connecting member 1123 can be accommodated in the fourth track groove, so that the fourth track groove is used to limit the movement track of the third rotating shaft 1124. In other embodiments, the portion of the fourth rotating shaft 1125 that exceeds the second connecting member 1123 can be accommodated in the fourth track groove, and the fourth track groove is used to limit the movement track of the fourth rotating shaft 1125.

[0142] Taking the cooperation between the fourth rotating shaft 1125 and the fourth track groove as an example, in a specific implementation, the part of the fourth rotating shaft 1125 located between the two second connecting members 1123 can be accommodated in 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 groove 1214 respectively, so that when the electronic device is in the unfolded state and the closed state, the position of the fourth rotating shaft 1125 is also relatively stable. With the restraining effect of the aforementioned second track groove on the second connecting member 1123, the embodiment of the present application 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 therewith, thereby further improving the reliability of the rotating shaft mechanism 1.

[0143] When the fourth track groove is specifically designed, the surface of the fourth protrusion may be an arc surface, and the groove surface of the fourth arc groove 1214 may also be an arc surface, and the center of the surface of the fourth protrusion coincides with the center of the groove surface of the fourth arc groove 1214. It is worth mentioning that when the surface of the fourth protrusion and the surface of the second protrusion are both arc surfaces, the surface of the fourth protrusion and the surface of the second protrusion may 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 distances between the surface of the fourth protrusion and the groove surface of the fourth arc groove 1214 can be equal at all places, so that the fourth track groove is formed into a groove of equal width. In the process of the electronic device 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 shaft 1125, and the groove surface of the fourth arc groove 1214 and the surface of the fourth shaft 1125 are always in abutment, so that in the process of unfolding and closing the electronic device, the motion track of the fourth shaft 1125 remains the same, thereby improving the motion stability of the second rotating component.

[0145] For reference Figure 4 and Fig.10, a second arc-shaped rotating block 11211 may be provided on a side of the second swing arm 1121 close to the base, and correspondingly, the base may be provided with a sixth arc-shaped groove 1216, and the second arc-shaped rotating block 11211 of the second swing arm 1121 may be accommodated in the sixth arc-shaped groove 1216, and may 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 the embodiment of the present application, the rotation axis of the second swing arm 1121 is arranged along the axial direction of the rotating shaft mechanism 1, and for the external 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. Among them, 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-shaped groove. At this time, the surface of the second arc-shaped rotating block 11211 that is used to contact 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, and the circles of the two circular arc surfaces coincide.

[0146] For reference Figure 8 and Fig.10 The main shaft 12 may further include a fourth fixing member 125, which may be covered on the sixth arc groove 1216, and the fourth fixing member 125 has a sixth protrusion arranged toward the sixth arc groove 1216, at least part of the second arc-shaped rotating block 11211 is located between the sixth protrusion and the sixth arc groove 1216, and the second arc-shaped rotating block 11211 may contact the surface of the sixth protrusion, thereby limiting the second arc-shaped rotating block 11211 between the fourth fixing member 125 and the base 121.

[0147] In a specific embodiment, there may be two second arc-shaped rotating blocks 11211, and the two second arc-shaped rotating blocks 11211 may be arranged at intervals along the axial direction of the rotating shaft mechanism. Correspondingly, there may also be two sixth arc-shaped grooves 1216, and the two sixth sub-arc-shaped grooves may also be arranged at intervals along the axial direction of the rotating shaft mechanism. The two second arc-shaped rotating blocks 11211 may be respectively accommodated in the two sixth arc-shaped grooves 1216, and each second arc-shaped rotating block 11211 may slide along the groove surface of the corresponding sixth arc-shaped groove 1216.

[0148] For reference Fig. 9 and Fig.10As shown, in the embodiment of the present application, the side of the second connecting member 1123 close to 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. At this time, 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 arranged in the hinge hole a2, so that when the second swing arm 1121 rotates around the main axis, the second connecting member 1123 is pulled to move in the second track groove, and the second swing arm 1121 and the second connecting member 1123 are rotatably connected.

[0149] For reference Fig. 9 and Fig.11 The second support arm 1122 is provided with a hinge hole b2, and the fourth rotating shaft 1125 can penetrate the hinge holes of the second support arm 1122 and the second connecting member 1123, so as to rotatably connect the second support arm 1122 with the second connecting member 1123. In addition, the second support arm 1122 may include two second sub-support arms 11221, and the two second sub-support arms 11221 are arranged at intervals along the axial direction of the rotating shaft mechanism. In this case, the side of the second connecting member 1123 close to the second support arm 1122 can be located between the two second sub-support arms 11221, so as to further improve the structural compactness of the second rotating assembly.

[0150] For reference Figure 4 and Fig.11 , one end of the second support arm 1122 close to the first housing fixing frame 113 is rotatably connected to the first housing fixing frame 113. In a specific implementation, a hinge hole c2 is provided at one end of the second support arm 1122 close to the first housing fixing frame 113, and correspondingly, a hinge hole d2 is provided on the first housing fixing frame 113, and the second support arm 1122 and the first housing fixing frame 113 can be rotatably connected via a rotating shaft passing through the hinge hole c2 and the hinge hole d2.

[0151] refer to Figure 4As shown, the second housing fixing frame 114 is provided with a second slot 1141, and the second slot 1141 extends along the second direction. One end of the second swing arm 1121 away from the main shaft 12 can be arranged in the second slot 1141. During the process of the second swing arm 1121 rotating around the main shaft 12, the second swing arm 1121 can slide in the second direction in the second slot 1141. In addition, the second swing arm 1121 can also swing slightly relative to the second housing fixing frame 114 during the sliding process, thereby reducing the risk of the second swing arm 1121 getting stuck in the second slot 1141 and improving the movement coordination of the second swing arm 1121 and the second housing fixing frame 114. Among them, the second direction is the direction in which the second housing fixing frame 114 approaches or moves away from the main shaft 12. It is easy to understand that the swinging direction of the second swing arm 1121 relative to the second housing fixing frame 114 is opposite to the rotation direction of the second swing arm 1121 relative to the main shaft 12.

[0152] In order to prevent the second swing arm 1121 from falling off from the second slot 1141, a second slide 11411 is provided on the slot wall of the second slot 1141, and accordingly, a second slider 11212 can be provided on the side of the second swing arm 1121, and the second slider 11212 is assembled in the second slide 11411. In this way, on the one hand, the second swing arm 1121 can be limited in the second slot 1141, and on the other hand, the second slide 11411 can be used to provide guidance for 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] In addition, along the second direction, the thickness of each position of the second slideway 11411 can be kept roughly the same, and the second slider 11212 can be a structure with a gradually changing 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 roughly equal to the thickness of the second slideway 11411, then the thickness of the end of the second slider 11212 close to the main shaft 12 is obviously less than the thickness of the second slideway 11411, so that after the second slider 11212 is assembled into the second slideway 11411, the end of the second slider 11212 away from the main shaft 12 can be against the wall of the second slideway 11411 A certain gap can be generated between the end of the second slider 11212 close to the main shaft 12 and the wall of the second slideway 11411, which can reduce the risk of the second slider 11212 shaking in the second slideway 11411 and realize the swing of the second slider 11212 in the second slideway 11411, that is, under the premise of realizing the rotation of the second swing arm 1121 relative to the second shell fixing frame 114, the risk of the second swing arm 1121 shaking is reduced, thereby further improving the movement stability of the second swing arm 1121.

[0154] For reference Figure 4 , Fig.13 and Fig.14 As shown, as mentioned above, the second rotating arm 1126 is rotatably connected to the main shaft, and the second rotating arm 1126 is 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 close to the first surface of the main shaft 12, that is, 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 close to the base 121, and the second rotating arm 1126 can be rotatably connected to the base 121 through 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 can be provided on one side of the base 121 close to the second housing fixing frame 114, and a hinge hole is provided on the groove wall of the second mounting groove 1218. The end of the second rotating arm 1126 close to the base 121 is located in the second mounting groove 1218, and the second hinge shaft 11261 is rotatably provided in the hinge hole.

[0156] Continue to refer Figure 4 , Fig.13 and Fig.14 The second housing fixing frame 114 may be provided with a second slide groove 1142, the second slide groove 1142 extending along the second direction, and the second rotating arm 1126 is slidably disposed in the second slide groove 1142 at one end close to the second housing fixing frame 114. Similarly, the groove wall of the second slide groove 1142 may be provided with a fourth slideway, and the end of the second rotating arm 1126 along the axial direction of the rotating shaft mechanism 1 may be located in the fourth slideway, so that the second rotating arm 1126 is limited by the fourth slideway and a guide is provided for the sliding of the second rotating arm 1126.

[0157] In one implementation, the second rotating arm 1126 may be provided with a second groove 11262 on a side facing the flexible display screen, and the second housing fixing frame 114 includes a second stopper 1143, which may be provided on a side of the second housing fixing frame 114 facing the flexible display screen, and the second stopper 1143 has a second protrusion 11431 provided away from the flexible display screen. The second housing fixing frame 114 has a second through hole 1147 connected to the second slide groove 1142 on a side facing the flexible display screen, and the second protrusion 11431 may 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 limit the sliding of the second rotating arm 1126 by using the second protrusion 11431, thereby reducing the risk of the second rotating arm 1126 slipping out of the second slide groove 1142. In addition, a certain gap may be reserved between the end of the second protrusion 11431 and the bottom of the second groove 11262 to prevent the second protrusion 11431 from generating friction with the bottom of the second groove 11262 and thus affecting the sliding smoothness of the second rotating arm 1126 .

[0158] Fig.17 This is another cross-sectional structural schematic diagram of the rotating shaft mechanism 1 provided in an embodiment of the present application when the electronic device is in an unfolded state. Fig.18 This is another cross-sectional structural diagram of the rotating shaft mechanism 1 provided in the embodiment of the present application when the electronic device is in a closed state. Fig.13 , Fig.14 as well as Fig.17 , Fig.18As shown, based on the hinge mechanism provided by the above-mentioned embodiment of the present application, during the process of the electronic device changing from the unfolded state to the closed state, the first shell fixing frame 113 and the second shell fixing frame 114 move toward each other, and the second shell 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 utilizes the sliding connection relationship with the second shell fixing frame 114 to restrict the rotation angle of the second shell fixing frame 114, and the second swing arm 1121 slides along the groove surface of the sixth arc 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. Because the second connecting member 1123 is rotatably connected to the second support arm 1122, the second connecting member 1123 can drive the second support arm 1122 to rotate counterclockwise around the main shaft when moving toward the second swing arm 1121 in the second trajectory groove 1202 of the main shaft 12, thereby driving the first shell fixing frame 113 to rotate counterclockwise around the main shaft 12 through the second support arm 1122. During the process of the electronic device moving from a closed state to an unfolded state, the first shell fixing frame 113 and the second shell fixing frame 114 move in opposite directions, and the second shell fixing frame 114 drives the second rotating arm 1126 and the second swing arm 1121 to rotate counterclockwise around the main axis 12. The second rotating arm 1126 can restrict the rotation angle of the second shell fixing frame 114 during the rotation around the second hinge axis, and the second swing arm 1121 can drive the second connecting member 1123 to move toward the second support arm 1122 in the second track groove 1202 of the main axis 12, thereby driving the second support arm 1122 to rotate clockwise around the main axis 12, so as to drive the first shell fixing frame 113 to rotate clockwise around the main axis 12 through the second support arm 1122.

[0159] The above-mentioned rotating shaft mechanism of the present application has a simple structure. Through the above-mentioned structural relationship, the second connecting member 1123 with a relatively small volume can be used to shuttle in the second track groove 1202 of the main shaft. Therefore, the second track groove 1202 also has a small size adapted to the second connecting member 1123, so that the main shaft 12 can also meet the movement requirements of the second connecting member 1123 with a smaller thickness and width, so that the effect of reducing the size of the main shaft 12 can be achieved, and the reliability of the rotating shaft mechanism 1 can be maintained. In addition, since the distance between the rotation axis of the second rotating arm 1126 and the flexible display screen is shortened, when the width of the main shaft 12 is reduced, the overlap between the second rotating arm 1126 and the second shell fixing frame 114 is still large enough, so that the virtual swing angle of the second shell fixing frame 114 relative to the main shaft 12 can be reduced, and the stability of the rotating shaft mechanism 1 can be improved.

[0160] In addition, since the second connecting member 1123 can move along a set track in the second track groove 1202, it is possible to avoid uncontrolled movement of the second connecting member 1123 during the entire closing and unfolding process, thereby avoiding random movement of the second shell fixing frame 114. In combination with the restraining effect of the second rotating arm 1126 on the second shell fixing frame 114, the structural and motion stability of the entire hinge mechanism 1 can be effectively improved. In some cases, by reasonably designing the second track groove 1202, the outer tangent of the hinge mechanism 1 can also maintain a constant length during the entire folding and unfolding process, thereby allowing the flexible display screen covering the surface of the hinge mechanism 1 to basically maintain a constant length. In this way, squeezing or pulling the flexible display screen can be effectively avoided, thereby improving the structural reliability of the flexible display screen, and thereby improving the structural reliability of the electronic device.

[0161] It is understandable that, during the unfolding and closing process of the electronic device, by making the first shell and the second shell move synchronously, the risk of the flexible display screen being subjected to instantaneous pressure or pulling stress can be effectively reduced. Based on this, the hinge mechanism 1 provided in the embodiment of the present application may also include a synchronization component. Figure 4 , Fig.19 and Fig. 20 As shown, Fig.19 This is another cross-sectional structural schematic diagram of the rotating shaft mechanism 1 provided in an embodiment of the present application when the electronic device is in an unfolded state. Fig. 20 Another schematic diagram of the cross-sectional structure of the rotating shaft mechanism 1 provided in the embodiment of the present application in the closed state of the electronic device. The synchronization component 13 may include a first gear connecting rod 131 and a second gear connecting rod 132, wherein the first gear connecting rod 131 includes a first gear 1311 and a first connecting rod 1312, the second gear connecting rod 132 includes a second gear 1321 and a second connecting rod 1322, the first gear 1311 and the second gear 1321 are respectively connected to the main shaft 12 for rotation, and the first gear 1311 and the second gear 1321 are connected for transmission, the first connecting rod 1312 is connected to the first housing fixing frame 113 for sliding connection, and the second connecting rod 1322 is connected to the second housing fixing frame 114 for sliding connection.

[0162] In a specific implementation, the first gear 1311 can be rotatably connected to the main shaft 12 via the fifth rotating shaft to improve the stability of the first gear connecting rod rotating around the main shaft 12, wherein the fifth rotating shaft extends along the axial direction of the rotating shaft mechanism 1. The first housing fixing frame 113 is provided with a third sliding groove 1134, and the first connecting rod 1312 is installed in the third sliding groove 1134, and the first connecting rod 1312 can slide in the third sliding groove 1134 relative to the first housing fixing frame 113 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 the sixth rotating shaft to improve the stability of the second gear connecting rod 132 rotating around the main shaft 12, wherein the sixth rotating shaft extends along the axial direction of the rotating shaft mechanism 1. The second housing fixing frame 114 is provided with a fourth sliding groove 1144, and the second connecting rod 1322 is installed in the fourth sliding groove 1144, and the second connecting rod 1322 can slide in the fourth sliding groove 1144 relative to the second housing fixing frame 114 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 embodiment of the present application, the transmission connection between the first gear 1311 and the second gear 1321 can be achieved by mutual engagement 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 respectively engaging the first gear 1311 and the second gear 1321 with adjacent intermediate gears.

[0165] Continue to refer Fig.19 and Fig. 20 When the electronic device changes from the unfolded state to the closed state, the rotation of the first housing fixing frame 113 can drive the first gear connecting rod 131 to rotate around the main shaft 12. Because 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 by transmission, the rotation of the first gear connecting rod 131 can drive the second gear connecting rod 132 to rotate in the opposite direction, and the sliding of the second gear connecting rod 132 along the fourth slide groove 1144 of the second housing fixing frame 114 drives the second housing fixing frame 114 to rotate in the same direction, thereby realizing the synchronous rotation of the first housing fixing frame 113 and the second housing fixing frame 114 in the opposite direction. In addition, when the electronic device changes from the closed state to the unfolded state, the movement direction of each component is opposite to the movement direction of the electronic device from the unfolded state to the closed state, thereby realizing the synchronous rotation of the first housing fixing frame 113 and the second housing fixing frame 114 in the opposite direction.

[0166] Fig.21 Another partial structural exploded view of the rotating shaft mechanism 1 provided in the embodiment of the present application. Figure 4 and Fig.21 As shown, in order to better realize the opening and closing of the hinge mechanism, the hinge mechanism can also be provided with a damping module that can provide a damping force for the above-mentioned rotating module, so that the rotating module can stably rotate under the action of the damping force to avoid the electronic device from opening and closing by mistake. The hinge mechanism can include a damping module, and the damping module can be arranged corresponding to one of the rotating modules. Alternatively, the hinge mechanism can also include a plurality of damping modules, and the plurality of damping modules can be arranged at intervals along the axial direction of the hinge mechanism, and the plurality of damping modules can be arranged one by one corresponding to 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 arranged on both sides of the main shaft 12, and the first damping component 141 is arranged corresponding to the first rotating component 111, and the second damping component 142 is arranged corresponding to the second rotating component 112. Fig.21 FIG. 4 shows the structure of the rotating shaft mechanism on one side of the first damping assembly 141. Fig.21 As shown, the first housing fixing frame 113 may be provided with a first limiting wall 1135, and 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, and the first damping assembly 141 may be provided 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, and the first limiting groove 1136 has a first opening arranged toward the first swing arm 1111, and at this time, the bottom wall of the first limiting groove 1136 arranged 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, wherein the first cam 1411 may be arranged on a side of the first swing arm 1111 facing the first limiting wall 1135, and the first cam 1411 has a first cam surface 14111 on the side facing the first limiting wall 1135; the second cam 1412 may be arranged on a side of the first cam 1411 facing away from the first swing arm 1111, and the second cam 1412 is slidably arranged on the first housing fixing frame 113 along the axial direction of the rotating shaft mechanism 1, and the second cam 1412 has a second cam surface 14121 on the side facing the first cam 1411; 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 bonding, welding or riveting. Alternatively, the first cam 1411 can also be an integrally formed structure with the first swing arm 1111, and it can also be understood that the first cam surface 14111 can be directly formed on the side of the first swing arm 1111, which 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 arranged in the first limiting groove 1136, and the second cam 1412 can be at least partially arranged in the first limiting groove 1136, so that the moving direction of the second cam 1412 driven by the first elastic member 1413 is limited by the first limiting groove 1136, thereby improving the structural stability and reliability of the first damping assembly 141, and at this time, the second cam surface 14121 of the second cam 1412 can be abutted against the first cam surface 14111 of the first cam 1411 through the first opening.

[0170] Optionally, the first elastic member 1413 may be Fig.21 The number of springs 14131 can be set according to the damping force required to be provided by the first damping assembly 141 and the space of the rotating shaft mechanism, such as Fig.21 , three springs 14131 are shown, and the three springs 14131 can be arranged in parallel between the second cam 1412 and the first limiting wall 1135. In addition, the first damping assembly 141 can also include a first guide column 14132 corresponding to each spring 14131, and the first guide column 14132 can be fixed to the side of the second cam 1412 away from the first cam 1411, and extend along the axial direction of the rotating shaft mechanism 1. The spring 14131 can be sleeved on the corresponding first guide column 14132, so as to reduce the risk of displacement of the spring 14131 when elastic deformation occurs. Exemplarily, the first guide column 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 member 1413 may also be a spring sheet, and there may be multiple spring sheets, which may be stacked between the second cam 1412 and the first limiting wall 1135 .

[0172] In the embodiment of the present application, the first cam surface 14111 and the second cam surface 14121 may include multiple protrusions and recessed portions. When the inclined surfaces of the protrusions of the two cam surfaces contact each other, a damping force may be generated between the two cam surfaces to prevent the two cam surfaces from continuing to rotate relative to each other. By reasonably designing the curved surface profiles of the first cam surface 14111 and the second cam surface 14121, during the closing process of the rotating shaft mechanism, as the first swing arm 1111 rotates, the first cam 1411 can push the second cam 1412 in the direction close to the first limiting wall 1135, thereby compressing the first elastic member 1413, so that the user can obtain a more obvious operating feel, which is beneficial to improving the user's experience; during the unfolding process of the rotating shaft mechanism 1, the first elastic member 1413 gradually rebounds in the compressed state and releases the accumulated elastic potential energy, thereby pushing the second cam 1412 to slide in the direction close to the first cam 1411, so that 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 for the rotating shaft mechanism 1, thereby reducing the difficulty of the unfolding operation of the rotating shaft mechanism 1.

[0173] In addition, in the embodiment of the present application, the first cam surface 14111 and the second cam surface 14121 can be reasonably designed to enable the first cam 1411 and the first swing arm 1111 to hover at a set angle, that is, the first rotating assembly can be hovered. When the hinge mechanism 1 is applied to electronic equipment, the hovering design of the first rotating assembly can be used to position the electronic equipment in some intermediate states, thereby further improving the user experience.

[0174] Similar to the structure of the first damping assembly, when the second damping assembly is specifically set, the second housing fixing frame may be provided with a second limiting wall, the 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 assembly may be provided between the second limiting wall and the second swing arm. In a 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, the second limiting groove having a second opening arranged toward the second swing arm, and in this case, the bottom wall of the second limiting groove arranged opposite to the side where the second opening is located may be formed as the second limiting wall.

[0175] The second damping assembly may include a third cam, a fourth cam and a second elastic member, wherein the third cam may be arranged on a side of the second swing arm facing the second limiting wall, and the third cam has a third cam surface on the side facing the second limiting wall; the fourth cam may be arranged on a side of the third cam away from the second swing arm, and the fourth cam is slidably arranged on the second shell fixing frame along the axial direction of the rotating shaft mechanism, and the fourth cam has a fourth cam surface on the side facing the third cam; the second elastic member may be limited 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 bonding, welding or riveting. Alternatively, the first cam can also be an integrally formed structure with the first swing arm. In addition, when the second housing bracket is provided with a second limiting groove, the second elastic member can be arranged in the second limiting groove, and the fourth cam can be at least partially arranged in the second limiting groove, so that the moving direction of the fourth cam under the second elastic drive is limited by the second limiting groove, thereby improving the structural stability and reliability of the second damping assembly. At this time, 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 member may be a spring or a spring sheet. When the second elastic member is a spring, the number of springs may be multiple, and the multiple springs may be arranged in parallel between the fourth cam and the second limiting wall. The second damping assembly may also include a second guide column arranged corresponding to each spring, and the second guide column may be fixed to a side of the fourth cam away from the first cam and extend along the axial direction of the rotating shaft mechanism. The spring may be sleeved on the corresponding second guide column, thereby reducing the risk of displacement of the spring when elastic deformation occurs.

[0178] In the embodiment of the present application, the third cam surface and the fourth cam surface may include a plurality of raised portions and recessed portions. When the inclined surfaces of the raised portions of the two cam surfaces are in contact, a damping force that hinders the two cam surfaces from continuing to rotate relative to each other may be generated between the two cam surfaces. By reasonably designing the curved surface profiles of the third cam surface and the fourth cam surface, during the closing process of the rotating shaft mechanism, as the second swing arm rotates, the third cam can push the fourth cam toward the second limiting wall, thereby compressing the second elastic member, so that the user obtains a more obvious operating feel and improves the user's experience; during the unfolding process of the rotating shaft mechanism, the second elastic member gradually rebounds in a compressed state and releases the accumulated elastic potential energy, thereby pushing the fourth cam to slide toward the third cam, so that 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 for the rotating shaft mechanism, thereby reducing the difficulty of the unfolding operation of the rotating shaft mechanism.

[0179] In addition, in the embodiment of the present application, by reasonably designing the third cam surface and the fourth cam surface, the third cam and the second swing arm can also be suspended at a set angle, that is, the second rotating assembly can be suspended. When the hinge mechanism is applied to electronic equipment, the electronic equipment can be positioned in some intermediate states by utilizing the suspended design of the second rotating assembly, thereby further improving the user experience.

[0180] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A rotating shaft mechanism, characterized in that: The device comprises a main shaft, a first rotating assembly, a second rotating assembly, a first shell fixing frame and a second shell fixing frame, wherein the main shaft has a first surface for supporting a flexible display screen, and the first shell fixing frame and the second shell fixing frame are respectively arranged on both sides of the main shaft, wherein: The first rotating assembly includes a first swing arm, a first support arm, a first connecting member and a first rotating arm, wherein the first swing arm is rotationally connected to the main shaft, and the first swing arm is slidably connected to the first housing fixing frame; the first support arm is rotationally connected to the second housing fixing frame; the first connecting member is located between the first swing arm and the first support arm, and the first connecting member is rotationally connected to the first swing arm and the first support arm respectively; the first rotating arm is rotationally 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 rotation axis of the first swing arm close to the first surface, and the first rotating arm is slidably connected to the first housing fixing frame; The second rotating assembly includes a second swing arm, a second supporting arm, a second connecting member and a second rotating arm, wherein the second swing arm is rotationally connected to the main shaft, and the second swing arm is slidably connected to the second housing fixing frame; the second supporting arm is rotationally connected to the second housing fixing frame; the second connecting member is located between the second swing arm and the second supporting arm, and the second connecting member is rotationally connected to the second swing arm and the second supporting arm respectively; the second rotating arm is rotationally connected to the main shaft, the rotation axis of the second rotating arm is parallel to the rotation axis of the second swing arm, and the rotation axis of the second rotating arm is located on the side of the rotation axis of the second swing arm close to the first surface, and the second rotating arm is slidably connected to the second housing fixing frame; The main shaft is provided with a first trajectory groove and a second trajectory groove, the first connecting member can move along the first trajectory groove to limit the movement trajectory of the first connecting member through the first trajectory groove; the second connecting member can move along the second trajectory groove to limit the movement trajectory of the second connecting member through the second trajectory groove.

2. The rotating shaft mechanism according to 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 via the second hinge shaft.

3. The rotating shaft mechanism according to claim 1 or 2, characterized in that: The first housing fixing frame is provided with a first slide groove, the first rotating arm is provided in the first slide groove, and when the first rotating arm rotates around the main axis, the first rotating arm slides in the first slide groove relative to the first housing fixing frame in a direction toward or away from the main axis; The second shell fixing frame is provided with a second slide groove, and the second rotating arm is arranged in the second slide groove. During the process of the second rotating arm rotating around the main axis, the second rotating arm slides in the second slide groove relative to the second shell fixing frame in a direction toward or away from the main axis.

4. The rotating shaft mechanism according to claim 3, characterized in that: A first groove is provided on a side of the first rotating arm facing the first surface of the main shaft; a first through hole connected to the first slide groove is provided on a side of the first housing fixing frame on the same side as the first surface of the main shaft, a first stopper is provided at the first through hole, the first stopper has a first protrusion arranged toward the first slide groove, an end of the first protrusion extends into the first groove, and the first protrusion can slide in the first groove; A second groove is provided on the side of the second rotating arm facing the first surface of the main shaft; a second through hole connected with the second slide groove is provided on the side of the second shell fixing frame on the same side as the first surface of the main shaft, and a second limiting member is covered at the second through hole, and the second limiting member has a second protrusion arranged toward the second slide groove, and an end of the second protrusion extends into the second groove, and the second protrusion can slide in the second groove.

5. 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 slot, and one end of the first swing arm away from the main shaft is arranged in the first slot, and when the first swing arm rotates around the main shaft, the first swing arm slides in the first slot relative to the first housing fixing frame in a direction toward or away from the main shaft; The second shell fixing frame is provided with a second slot, and one end of the second swing arm away from the main shaft is arranged in the second slot. During the process of the second swing arm rotating around the main shaft, the second swing arm slides in the second slot relative to the second shell fixing frame in a direction toward or away from the main shaft.

6. The rotating shaft mechanism according to claim 5, characterized in that: The first swing arm swings relative to the first housing fixing frame during the sliding process in the first slot, 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 axis; The second swing arm swings relative to the second housing fixing frame during sliding in the second slot, and the swinging 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 axis.

7. The rotating shaft mechanism according to claim 6, characterized in that: A first slideway is provided on the groove wall of the first groove, and the thickness of the first slideway is the same at any position; a first slider is provided on the side of the first swing arm, and the first slider is assembled in the first slideway. The thickness of the first slider gradually increases in the direction away from the main axis, and the thickness of the first slider at one end away from the main axis is equal to the thickness of the first slideway; A second slide track is provided on the groove wall of the second groove, and the thickness of the second slide track is the same at any position; a second slider is provided on the side of the second swing arm, and the second slider is assembled in the second slide track. The thickness of the second slider gradually increases in the direction away from the main axis, and the thickness of the second slider at one end away from the main axis is equal to the thickness of the first slide track.

8. The rotating shaft mechanism according to any one of claims 1 to 7, characterized in that: The spindle comprises a base, a first fixing member and a second fixing member, a first arc groove and a second arc groove are arranged on a side of the base away from the first side of the spindle, the first fixing member covers the first arc groove, and the second fixing member covers the second arc groove; A first protrusion is provided on one side of the first fixing member facing the base, and a gap between a surface of the first protrusion and a groove surface of the first arc-shaped groove serves as the first track groove, and when the rotating shaft mechanism is in an expanded state and a closed state, a surface of the first connecting member abuts against a surface of the first protrusion and a groove surface of the first arc-shaped groove respectively; A second protrusion is provided on the side of the second fixing member facing the base, and the gap between the surface of the second protrusion and the groove surface of the second arc-shaped groove serves as the second track groove. When the rotating shaft mechanism is in the expanded 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 according to claim 8, characterized in that: The first rotating assembly further includes a first rotating shaft and a second rotating shaft, the first connecting member and the first swing arm are rotatably connected via the first rotating shaft, the first connecting member and the first support arm are rotatably connected via the second rotating shaft, and the axis of the first rotating shaft is parallel to the axis of the second rotating shaft and does not overlap; The second rotating assembly also includes a third rotating shaft and a fourth rotating shaft. The second connecting member is rotationally connected to the second swing arm via the third rotating shaft. The second connecting member is rotationally connected to the second support arm via the fourth rotating shaft. The axis of the third rotating shaft is parallel to and does not overlap with the axis of the fourth rotating shaft.

10. The rotating shaft mechanism according to claim 9, characterized in that: A third arc groove and a fourth arc groove are provided on a surface of the base away from the first surface of the main axis, wherein the third arc groove is arranged adjacent to the first arc groove, and the depth of the third arc groove is less than the depth of the first arc groove; the fourth arc groove is arranged adjacent to the second arc groove, and the depth of the fourth arc groove is less than the depth of the second arc groove; The first fixing member is covered in the third arc-shaped groove, a third protrusion is provided on a side of the first fixing member facing the base, a third track groove is formed between the surface of the third protrusion and the groove surface of the third arc-shaped groove, and a portion of the first rotating shaft or the second rotating shaft that exceeds the first connecting member is accommodated in the third track groove, so as to limit the movement track of the first rotating shaft or the second rotating shaft through the third track groove; The second fixing member is covered on the fourth arc-shaped groove, and a fourth protrusion is provided on the side of the first fixing member facing the base, and a fourth track groove is formed between the surface of the fourth protrusion and the groove surface of the fourth arc-shaped groove, and the part of the third rotating shaft or the fourth rotating shaft that exceeds the first connecting member is accommodated in the fourth track groove to limit the movement trajectory of the third rotating shaft or the fourth rotating shaft through the third track groove.

11. The rotating shaft mechanism according to any one of claims 1 to 10, characterized in that: The spindle comprises a base, a fifth arc groove and a sixth arc groove are arranged on a surface of the base away from the first surface of the spindle, the first swing arm comprises a first arc rotation block, the first arc rotation block is arranged in the fifth arc groove, and the first arc rotation block can slide along the groove surface of the fifth arc groove to rotationally connect the first swing arm with the spindle; 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 rotationally connect the second swing arm to the main shaft.

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

13. The rotating shaft mechanism according to any one of claims 1 to 12, characterized in that: There are multiple first connecting members, and the multiple first connecting members are arranged along the axial direction of the rotating shaft mechanism, and each of the first connecting members is rotatably connected to the first swing arm and the first support arm respectively; There are multiple second connecting members, 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 13, characterized in that: The rotating shaft mechanism further comprises a synchronization assembly, wherein the synchronization assembly comprises a first gear connecting rod and a second gear connecting rod; The first gear connecting rod comprises 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, the second connecting rod is slidably connected to the second housing fixing frame, and the first gear is transmission-connected to the second gear.

15. The rotating shaft mechanism according to any one of claims 1 to 14, characterized in that: The first housing fixing frame is provided with a first limiting wall, and the first limiting wall and the first swing arm are spaced apart along the axial direction of the rotating shaft mechanism; the second housing fixing frame is provided with a second limiting wall, and the second limiting wall and the second swing arm are spaced apart along the axial direction of the rotating shaft mechanism; the rotating shaft mechanism further includes a first damping assembly and a second damping assembly, wherein: The first damping assembly is arranged between the first swing arm and the first limiting wall, and comprises a first cam, a second cam and a first elastic member; the first cam is arranged 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 arranged on the first housing fixing frame along the axial direction of the rotating shaft mechanism, and the cam surface of the second cam abuts against the cam surface of the first cam; the first elastic member is limited between the second cam and the first limiting wall; The second damping assembly is arranged between the second swing arm and the second limiting wall, and the first damping assembly includes a third cam, a fourth cam and a second elastic member; the third cam is arranged on the side of the second swing arm facing the second limiting wall; the fourth cam is arranged on the side of the third cam away from the second swing arm, and the fourth cam is slidably arranged on the second shell fixing frame along the axial direction of the rotating shaft mechanism, and the cam surface of the fourth cam abuts against the cam surface of the third cam; the second elastic member is limited between the fourth cam and the second limiting wall.

16. The rotating shaft mechanism according to claim 15, characterized in that: The first housing bracket 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 arranged toward the first swing arm, and a groove wall arranged in the first limiting groove opposite to the first opening forms the first limiting wall; the first elastic member is arranged in the first limiting groove, the second cam is at least partially arranged 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 shell bracket 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 arranged toward the second swing arm, and the groove wall arranged opposite to the second opening in the second limiting groove forms the second limiting wall; the second elastic member is arranged in the second limiting groove, the fourth cam is at least partially arranged 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: The device comprises a first housing, a second housing, a flexible display screen, and a hinge mechanism as claimed in any one of claims 1 to 16, wherein: The first shell and the second shell are respectively arranged on opposite sides of the rotating shaft mechanism, the first shell fixing frame is fixedly connected to the first shell, and the second shell fixing frame is fixedly connected to the second shell; The flexible display screen continuously covers the first shell, the second shell and the hinge mechanism, and the flexible display screen is fixedly connected to the first shell and the second shell.

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