Rotating shaft mechanism and electronic equipment

Abstract

The invention discloses a rotating shaft mechanism and electronic equipment, and aims to improve the opening and closing stability of the rotating shaft mechanism and reduce the size of the rotating shaft mechanism. The rotating shaft mechanism comprises a main shaft, a first shell fixing frame, a rotating module and a first damping assembly, the rotating module comprises a first swing arm, the first swing arm is rotationally connected with the main shaft, and the first swing arm is slidably connected with the first shell fixing frame; the first damping assembly comprises a first cam, a second cam, a first elastic piece and a first limiting block, the first cam is arranged on the side, in the axial direction of the rotating shaft mechanism, of the first swing arm, the second cam is located on the side, away from the first swing arm, of the first cam, and the second cam is slidably arranged on the first shell fixing frame in the axial direction of the rotating shaft mechanism; the cam surface of the second cam abuts against the cam surface of the first cam, the first limiting block is located on the side, away from the first swing arm, of the second cam and fixed to the first shell fixing frame, and the two ends of the first elastic piece abut against the second cam and the first limiting block respectively.

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 screen mobile phones, foldable flexible screen tablets, and wearable electronic devices with foldable flexible screens 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 closing and unfolding functions. In addition to being used to change the folding state of the electronic device, it can also provide sufficient damping force for the entire electronic device in different usage states, so that the electronic device has reliable support force during the folding state switching process. However, as electronic devices continue to develop in the direction of being lighter and thinner, the size of the hinge mechanism also needs to be reduced accordingly to match the thin electronic devices. However, the structure used to provide damping resistance in the current hinge mechanism is often too large in size, which is difficult to adapt to the trend of the hinge mechanism and electronic devices being lighter and thinner. Summary of the invention

[0004] The present application provides a hinge mechanism and an electronic device to improve the opening and closing stability of the hinge mechanism and reduce the size of the hinge mechanism.

[0005] In the first aspect, the present application provides a rotating shaft mechanism, which may include a main shaft, a first housing fixing frame, a second housing fixing frame, a rotating module and a damping module, wherein the first housing fixing frame and the second housing fixing frame may be respectively arranged on both sides of the main shaft. The rotating module may include a first swing arm and a second swing 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 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 damping module may include a first damping assembly and a second damping assembly, wherein the first damping assembly includes a first cam, a second cam, a first elastic member and a first limit block, wherein the first cam may be arranged on one side of the first swing arm along the axial direction of the rotating shaft mechanism, the second cam is located on the side of the first cam away from the first swing arm, and the second cam is slidingly arranged on the first housing fixing frame along the axial direction of the rotating shaft mechanism, the cam surface of the second cam abuts against the cam surface of the first cam, the first limit block is located on the side of the second cam away from the first swing arm, and the first limit block is fixed to the first housing fixing frame, and the two ends of the first elastic member are respectively connected to the first limit block. The second cams are abutted against the first limit block; the second damping assembly includes a third cam, a fourth cam, a second limit piece and a second limit block. The third cam can be arranged on the side of the second swing arm along the axial direction of the rotating shaft mechanism, the fourth cam can be located 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, the cam surface of the fourth cam is abutted against the cam surface of the third cam, the second limit block is located on the side of the fourth cam away from the second swing arm, and the second limit block is fixed to the second shell fixing frame, and the two ends of the second elastic member are respectively abutted against the fourth cam and the second limit block.

[0006] When the hinge mechanism provided by the present application is applied to an electronic device, during the closing process of the electronic device, the first shell fixing frame and the second shell fixing frame move toward each other, the first shell fixing frame drives the first swing arm to rotate clockwise, and the second shell fixing frame drives the second swing arm to rotate counterclockwise. As the first swing arm and the second swing arm rotate, the first cam can push the second cam in the direction close to the first limit block, thereby compressing the first elastic member, and the second swing arm can push the fourth cam in the direction close to the second limit block, thereby compressing the second elastic member. In this way, the user can obtain a more obvious operating method when closing the electronic device. During the unfolding of the electronic device, the first elastic member gradually rebounds in a compressed state and releases the accumulated elastic potential energy, thereby pushing the second cam to slide in a direction close to the first cam, and the second elastic member gradually rebounds in a compressed state and releases the accumulated elastic potential energy, thereby pushing the fourth cam to slide in a direction close to the third cam, so that the second cam can apply a torque to the first cam and the first swing arm to assist their rotation, and 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 electronic device, thereby reducing the difficulty of the unfolding operation of the electronic device.

[0007] In addition, in the present application, by reasonably designing the cam surfaces of the first cam and the second cam, the first cam and the first swing arm can be suspended at a set angle, that is, the first rotating assembly can be suspended; similarly, by reasonably designing the cam surfaces of the third cam and the fourth cam, the third cam and the second swing arm can be suspended at a set angle, that is, the second rotating assembly can be suspended. In an electronic device using the hinge mechanism, the first rotating assembly and the second rotating assembly can be suspended to position the electronic device in some intermediate states, which is conducive to improving the user experience.

[0008] In some embodiments, the first housing fixing frame may be provided with a first limiting groove, the first limiting groove extending along the axial direction of the rotating shaft mechanism, and the first limiting groove has a first opening arranged toward the first swing arm. The first limiting block may be fixed in the first limiting groove, the second cam may be slidably arranged in the first limiting groove, and the cam surface of the second cam may abut against the cam surface of the first cam through the first opening. In this way, the first limiting groove may be used to limit the moving direction of the second cam driven by the first elastic member, and the second cam may also overlap or partially overlap with the first housing fixing frame in the thickness direction of the rotating shaft mechanism, thereby helping to reduce the thickness of the rotating shaft mechanism.

[0009] Similarly, the second housing fixing frame may be provided with a second limiting groove, the second limiting groove extending along the axial direction of the rotating shaft mechanism, and the second limiting groove has a second opening arranged toward the second swing arm. The second limiting block may be fixed in the second limiting groove, the fourth cam may be slidably arranged in the second limiting groove, and the cam surface of the fourth cam may abut against the cam surface of the third cam through the second opening. In this way, the second limiting groove may be used to limit the moving direction of the fourth cam driven by the second elastic member, and the fourth cam may be overlapped or partially overlapped with the second housing fixing frame in the thickness direction of the rotating shaft mechanism, thereby helping to reduce the thickness of the rotating shaft mechanism.

[0010] In some embodiments, the groove wall of the first limiting groove and the first opening can be formed into a first limiting block, which can simplify the structure of the shaft mechanism and help improve the compactness of the shaft mechanism. Based on the same principle, the groove wall of the second limiting groove and the second opening can be formed into a second limiting block.

[0011] In some embodiments, the groove wall of the first limiting groove may be provided with a first guide groove, which extends along the axial direction of the rotating shaft mechanism, and the second cam may be provided with a first guide block, which is slidably set in the first guide groove, so that the first guide groove provides guidance for the sliding of the second cam in the first limiting groove; similarly, the groove wall of the second limiting groove may be provided with a second guide groove, which extends along the axial direction of the rotating shaft mechanism, and the fourth cam may be provided with a second guide block, which is slidably set in the second guide groove, so that the second guide groove provides guidance for the sliding of the fourth cam in the second limiting groove.

[0012] In some embodiments, a first groove may be provided on the side of the second cam facing the first housing fixing frame, a second groove may be provided on the first housing fixing frame at a position corresponding to the first groove, and the first elastic member may be located in a space formed by the first groove and the second groove. With this design, the depths of the first groove and the second groove are relatively small, so the thickness of the second cam and the first housing fixing frame can be appropriately reduced, thereby helping to reduce the overall thickness of the shaft mechanism. Similarly, a third groove may be provided on the side of the fourth cam facing the second housing fixing frame, a fourth groove may be provided on the second housing fixing frame at a position corresponding to the third groove, and the second elastic member may be located in a space formed by the third groove and the fourth groove. With this design, the depths of the third groove and the fourth groove are relatively small, so the thickness of the fourth cam and the second housing fixing frame can be appropriately reduced, thereby helping to reduce the overall thickness of the shaft mechanism.

[0013] For example, when the first housing fixing frame is provided with a first limiting groove, the second groove can be provided on the bottom wall of the first limiting groove. Similarly, when the second housing fixing frame is provided with a second limiting groove, the fourth groove can be provided on the bottom wall of the second limiting groove.

[0014] In some embodiments, the first housing fixing frame may also be provided with a first avoidance groove, which may be connected to the first guide groove. When the first cam is installed in the first limiting groove, the first avoidance groove may avoid the first guide block of the second cam, so that the first guide block of the second cam passes through the first avoidance groove and smoothly enters the first guide groove, thereby reducing the difficulty of installing the second cam on the first housing fixing frame. The second housing fixing frame may also be provided with a second avoidance groove, which may be connected to the second guide groove. When the fourth cam is installed in the second limiting groove, the second avoidance groove may avoid the second guide block of the fourth cam, so that the second guide block of the fourth cam smoothly enters the second guide groove, thereby reducing the difficulty of installing the fourth cam on the second housing fixing frame.

[0015] In some embodiments, 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 integral structure with the first swing arm. Similarly, the third cam can be fixed to the side of the second swing arm by bonding, welding or riveting. Alternatively, the third cam can also be an integral structure with the second swing arm.

[0016] In some embodiments, the number of first damping components in the damping module may be two, and the two first damping components may be symmetrically arranged on both sides of the first swing arm along the axial direction of the rotating shaft mechanism, so that the forces on both sides of the first swing arm are balanced, the risk of the first swing arm getting stuck is reduced, and the movement reliability of the first swing arm is improved. Similarly, the number of second damping components in the damping module may also be two, and the two second damping components may be symmetrically arranged on both sides of the second swing arm along the axial direction of the rotating shaft mechanism, so that the forces on both sides of the second swing arm are balanced, the risk of the second swing arm getting stuck is reduced, and the movement reliability of the second swing arm is improved.

[0017] In some embodiments, the rotating module may further include a first support arm, a second support arm, a first connecting member, and a second connecting member. The first support arm may be rotatably 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 rotatably connected to the first swing arm and the first support arm respectively; the main shaft is provided with a first track groove, and the first connecting member may move along the first track groove to limit the movement track of the first connecting member through the first track groove. The second support arm may be rotatably connected to the second housing fixing frame, the second connecting member is located between the second swing arm and the second support arm, and the second connecting member is rotatably connected to the second swing arm and the second support portion respectively; the main shaft is also provided with a second track groove, and the second connecting member may move along the second track groove to limit the movement track of the second connecting member through the second track groove.

[0018] Based on the above-mentioned rotating shaft mechanism of the present application, when the electronic device changes from an unfolded state to a closed state, the first shell fixing frame and the second shell fixing frame move toward each other. When the first shell fixing frame drives the first swing arm to rotate in a clockwise direction around the main axis, 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 axis, thereby driving the first support arm to rotate in a counterclockwise direction around the main axis; when the second shell fixing frame drives the second swing arm to rotate in a counterclockwise direction around the main axis, 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 axis, thereby driving the second support arm to rotate in a clockwise direction around the main axis. When the electronic device moves from the closed state to the unfolded state, the first housing fixing frame and the second housing fixing frame move in opposite directions. When the first housing fixing frame drives the first swing arm to rotate counterclockwise around the main axis, 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 axis, thereby driving the first support arm to rotate clockwise around the main axis; when the second housing fixing frame drives the second swing arm to rotate clockwise around the main axis, 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 axis, thereby driving the second support arm to rotate counterclockwise around the main axis. Thus, the folding and unfolding functions of the rotating shaft mechanism can be realized.

[0019] In order to ensure the stability of some existing rotating shaft mechanisms, it is necessary to strengthen the thickness of the rotating assembly connected to the main shaft, which will make the main shaft and the rotating shaft mechanism very thick. If the rotating shaft mechanism is forcibly thinned, it is easy to weaken the strength of the rotating assembly, which greatly affects the reliability of the rotating shaft mechanism and reduces the life of the electronic device. The above-mentioned rotating shaft mechanism of the present application has a simple structure. Through the above-mentioned structural relationship, the first connecting member and the second connecting member can slide in the main shaft to link the first swing arm, the second swing arm, the first support arm and the second support arm on the left and right sides. Therefore, the thickness section of the first connecting member and the second connecting member does not need to be made very thick to shuttle between the first track groove and the second track groove of the main shaft. At the same time, because the first connecting member and the second connecting member are respectively connected to the first swing arm (the second swing arm) and the first support arm (the second support arm), the first connecting member (the second connecting member) has a sufficient length to extend in the direction perpendicular to the axial direction, so it has sufficient strength to ensure the reliability of the rotating shaft mechanism. In this way, the effect of thinning the thickness of the main shaft and the thickness of the whole machine can be achieved, and the reliability of the rotating shaft mechanism can be maintained, making the entire rotating shaft mechanism thin and reliable.

[0020] In addition, since the first connecting member can move along a set track in the first track groove, and the second connecting member can move along a set track in the second track groove, it is possible to avoid uncontrolled movement of the first connecting member and the second connecting member during the entire folding and unfolding process, thereby avoiding random movement of the first shell fixing frame and the second shell fixing frame, thereby ensuring the structural and motion stability of the entire hinge mechanism. 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, thus effectively avoiding squeezing or pulling of the flexible display screen, thereby improving the structural reliability of the flexible display screen, and thereby improving the structural reliability of the electronic device.

[0021] In some embodiments, the main shaft includes a base and a cover plate, the cover plate is covered on the base, the base is provided with a first arc groove, the cover plate includes a first protrusion arranged toward the first arc groove, and the gap between the surface of the first protrusion and the groove surface of the first arc groove can be used as the first track groove. In addition, the first connecting member may include a first arc surface and a second arc surface, and when the electronic device is in an expanded state and a closed state, the first arc surface abuts against the surface of the first protrusion, and the second arc surface abuts against the groove surface of the first arc groove. Thereby, 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 when the rotating shaft mechanism is in the expanded state and the closed state, the position of the first connecting member is relatively stable, and no virtual position shaking occurs, so as to improve the reliability of the rotating shaft mechanism in the above two states.

[0022] In addition, the base may also be provided with a third arc groove, and the cover plate may also include a third protrusion provided toward the third arc groove, and the gap between the surface of the third protrusion and the groove surface of the third arc groove serves as the second track groove, and the second connecting member includes a third arc surface and a fourth arc surface, and when the electronic device is in the unfolded state and the closed state, the third arc surface abuts against the surface of the third protrusion, and the fourth arc surface abuts against the groove surface of the third arc groove. Thus, the surface of the third protrusion and the groove surface of the third arc groove limit the second connecting member to the second track groove, so that when the rotating shaft mechanism is in the unfolded state and the closed state, the position of the second connecting member is relatively stable, and no virtual position shaking occurs, so as to improve the reliability of the rotating shaft mechanism in the above two states.

[0023] In some embodiments, when the electronic device changes from the expanded state to the closed state, the first arc surface abuts against the surface of the first protrusion, and there is a gap between the second arc surface and the groove surface of the first arc groove. When the electronic device changes from the closed state to the expanded state, the second arc surface abuts against the groove surface of the first arc groove, and there is a gap between the first arc surface and the surface of the first protrusion. As a result, the movement trajectory of the first connecting member in the first track groove when the electronic device changes from the expanded state to the closed state is different from the movement trajectory of the first connecting member in the first track groove when the electronic device changes from the closed state to the expanded state, which is conducive to improving the flexibility of the hinge mechanism design.

[0024] In addition, when the electronic device changes from the unfolded state to the closed state, the third arc surface abuts against the surface of the third protrusion, and there is a gap between the fourth arc surface and the groove surface of the third arc groove. When the electronic device changes from the closed state to the unfolded state, the fourth arc surface abuts against the groove surface of the third arc groove, and there is a gap between the third arc surface and the surface of the third protrusion. As a result, the movement track of the second connecting member in the second track groove when the electronic device changes from the unfolded state to the closed state is different from the movement track of the second connecting member in the second track groove when the electronic device changes from the closed state to the unfolded state, which is conducive to improving the flexibility of the hinge mechanism design.

[0025] In some embodiments, the movement trajectory of the first connector in the first track groove during the electronic device's transition from the expanded state to the closed state can be the same as the movement trajectory of the first connector in the first track groove during the electronic device's transition from the closed state to the expanded state. Specifically, the spacing between the surface of the first protrusion and the groove surface of the first arc groove is equal at all locations, and the first track groove is an equal-width groove. During the electronic device's transition from the expanded state to the closed state and from the closed state to the expanded state, the first arc surface abuts against the surface of the first protrusion, and the second arc surface abuts against the groove surface of the first arc groove, which can help improve the stability of the movement of the first connector in the first track groove. Similarly, the spacing between the surface of the third protrusion and the groove surface of the third arc groove at all locations can also be equal, so that the second track groove is a groove of equal width. In addition, when the electronic device changes from the expanded state to the closed state and from the closed state to the expanded state, the third arc surface abuts against the surface of the third protrusion, and the fourth arc surface abuts against the groove surface of the third arc groove, so that the movement trajectory of the second connecting member in the second track groove when the electronic device changes from the expanded state to the closed state is the same as the movement trajectory of the second connecting member in the second track groove when the electronic device changes from the closed state to the expanded state, thereby improving the stability of the second connecting member's movement in the second track groove.

[0026] In some embodiments, the first curved surface of the first connecting member may be a circular arc surface, and the second curved surface may also be a circular arc surface. In this case, the sum of the radius of the first curved surface and the radius of the second curved surface can be equal to the distance between the surface of the first protrusion and the groove surface of the first curved groove, so as to improve the smoothness of the movement of the first connecting member in the first trajectory groove.

[0027] Similarly, the third arc surface of the second connecting member can be an arc surface, and the fourth arc surface can also be an arc surface. In this case, the sum of the radius of the third arc surface and the radius of the fourth arc surface can be equal to the distance between the surface of the third protrusion and the groove surface of the third arc groove, so as to improve the smoothness of the movement of the second connecting member in the second track groove.

[0028] In some embodiments, the first swing arm is rotatably connected to the main shaft, wherein the base is provided with a second arc groove, the first swing arm comprises a first arc rotating block, the first arc rotating block is accommodated in the second arc groove, and the first arc rotating block can slide along the groove surface of the second arc groove to realize the rotatable connection between the first swing arm and the main shaft. Thus, the first swing arm is rotatably connected to the main shaft by means of a virtual axis, which is conducive to reducing the space occupied by the first swing arm on the main shaft, thereby facilitating the miniaturization design of the rotating shaft mechanism.

[0029] In addition, the second swing arm is also rotatably connected to the main shaft, and the base is further provided with a fourth arc groove, and the second swing arm includes a second arc rotating block, and the second arc rotating block is accommodated in the fourth arc groove, and the second arc rotating block can slide along the groove surface of the fourth arc groove to realize the rotatable connection between the second swing arm and the main shaft. Thus, the second swing arm is rotatably connected to the main shaft by means of a virtual axis, which is conducive to reducing the space occupied by the second swing arm on the main shaft, thereby facilitating the miniaturization design of the rotating shaft mechanism.

[0030] In order to improve the reliability of the connection between the first swing arm and the main shaft, in the present application, the cover plate also includes a second protrusion arranged toward the second arc-shaped groove, and at least a portion of the first arc-shaped rotating block is located between the second protrusion and the second arc-shaped groove, so that the first swing arm can be limited to the main shaft by the second protrusion and the second arc-shaped groove, thereby preventing the first swing arm from escaping from the second arc-shaped groove.

[0031] In addition, the cover plate also includes a fourth protrusion arranged toward the fourth arc groove, and at least a portion of the second arc-shaped rotating block is located between the fourth protrusion and the fourth arc groove, so that the second swing arm can be limited to the main shaft through the fourth protrusion and the fourth arc groove, thereby preventing the second swing arm from escaping from the fourth arc groove.

[0032] In some embodiments, the first connecting member includes a fifth rotating shaft and a sixth rotating shaft, the first connecting member and the first swing arm are rotationally connected via the first rotating shaft, the first connecting member and the first support arm are rotationally connected via the fifth rotating shaft, and the axis of the fifth rotating shaft is parallel to the axis of the sixth rotating shaft and does not overlap, so that the first swing arm and the first support arm can achieve mutual pulling movement through the first connecting member.

[0033] The second connecting member includes a seventh rotating shaft and an eighth rotating shaft. The second connecting member and the second swing arm are rotationally connected via the seventh rotating shaft. The second connecting member and the second support arm are rotationally connected via the eighth rotating shaft. The axis of the seventh rotating shaft is parallel to the axis of the eighth rotating shaft and does not overlap, so that the second swing arm and the second support arm can achieve mutual pulling movement through the second connecting member.

[0034] When the first swing arm is rotatably connected to the first connecting member through the fifth rotating shaft, the first arc-shaped rotating block can be provided with a first mounting groove, and the notch of the first mounting groove is arranged toward the second arc-shaped groove. The fifth rotating shaft is installed in the first mounting groove, and a part of the surface of the fifth rotating shaft contacts the groove surface of the first mounting groove, and a part of the surface of the fifth rotating shaft contacts the groove surface of the second arc-shaped groove. By installing the fifth rotating shaft in the first mounting groove of the first arc-shaped rotating block, the size of the first arc-shaped rotating block can be effectively reduced, and the thickness of the first mounting groove does not need to be increased due to the size of the first rotating shaft, which is conducive to the miniaturization design of the rotating shaft mechanism.

[0035] In addition, the groove surface of the first mounting groove includes a first arc surface, and the surface of the fifth rotating shaft used to contact the groove surface of the first mounting groove is a second arc surface. The center of the first arc surface coincides with the center of the second arc surface. In this way, during the process of the first arc rotating block sliding along the groove surface of the second arc groove, the fifth rotating shaft can rotate relative to the first arc rotating block to realize the rotational connection between the first swing arm and the fifth rotating shaft.

[0036] The groove surface of the second arc groove is the third arc surface, and the surface of the fifth rotating shaft used to contact the groove surface of the second arc groove is the fourth arc surface. The center of the third arc surface coincides with the center of the fourth arc surface. In this way, while the fifth rotating shaft slides along the groove surface of the second arc groove with the first arc rotating block, the fifth rotating shaft can also rotate relative to the first arc rotating block and the second arc groove, thereby facilitating the movement of the first connecting member relative to the main shaft.

[0037] Similarly, the second arc-shaped rotating block is provided with a second mounting groove, the notch of the second mounting groove is arranged toward the fourth arc-shaped groove, the seventh rotating shaft is installed in the second mounting groove, a part of the surface of the seventh rotating shaft contacts the groove surface of the second mounting groove, and a part of the surface of the seventh rotating shaft contacts the groove surface of the fourth arc-shaped groove. By installing the seventh rotating shaft in the second mounting groove of the second arc-shaped rotating block, the size of the second arc-shaped rotating block can be effectively reduced, and the thickness of the second mounting groove does not need to be increased due to the size of the third rotating shaft, which is conducive to the miniaturization design of the rotating shaft mechanism.

[0038] The second mounting groove may include a fifth arc surface, the surface of the seventh rotating shaft that contacts the groove surface of the second mounting groove is a sixth arc surface, and the center of the fifth arc surface coincides with the center of the sixth arc surface. In addition, the groove surface of the fourth arc groove is a seventh arc surface, and the surface of the seventh rotating shaft that contacts the groove surface of the fourth arc groove may be an eighth arc surface, and the center of the seventh arc surface coincides with the center of the eighth arc surface. In this way, while the seventh rotating shaft slides along the groove surface of the fourth arc groove with the second arc rotating block, the seventh rotating shaft can also rotate relative to the second arc rotating block and the fourth arc groove, thereby facilitating the movement of the second connecting member relative to the main shaft.

[0039] 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 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 from the unfolded state to the closed state, the two shells rotate synchronously towards each other to drive the flexible display screen to rotate, and in the process of the electronic device from the closed state to the unfolded state, the two shells rotate synchronously away from 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

[0040] Figure 1 A schematic diagram of a structure of an electronic device provided in an embodiment of the present application when in a closed state;

[0041] Figure 2a A schematic diagram of a structure of an electronic device provided in an embodiment of the present application when in an unfolded state;

[0042] Figure 2b Another structural schematic diagram of an electronic device provided in an embodiment of the present application when in an unfolded state;

[0043] Figure 3 for Figure 2b A schematic diagram of a partial structure of a rotating shaft mechanism of an electronic device;

[0044] Figure 4 for Figure 3 An exploded view of the structure shown in;

[0045] Figure 5A cross-sectional view of the first connecting member of the rotating shaft mechanism provided in an embodiment of the present application when the electronic device is in an unfolded state;

[0046] Figure 6 A schematic diagram of the structure of a main shaft provided in an embodiment of the present application;

[0047] Figure 7 for Figure 6 A structural schematic diagram of the base of the main shaft shown;

[0048] Figure 8 for Figure 6 A schematic structural diagram of a cover plate of the main shaft shown;

[0049] Fig. 9 A cross-sectional view of the first connecting member of the rotating shaft mechanism provided in an embodiment of the present application when the electronic device is in a closed state;

[0050] Fig.10 A schematic structural diagram of a first connecting member provided in an embodiment of the present application;

[0051] Fig.11 A schematic diagram of the assembly structure of the first connecting member and the main shaft provided in an embodiment of the present application;

[0052] Fig.12 for Figure 3 AA cross-sectional view of the structure shown in;

[0053] Fig.13 A cross-sectional view of the first swing arm of the rotating shaft mechanism provided in an embodiment of the present application when the electronic device is in a closed state;

[0054] Fig.14 A schematic diagram of the structure of a first rotating assembly provided in an embodiment of the present application;

[0055] Fig.15 A schematic diagram of the structure of a first swing arm provided in an embodiment of the present application;

[0056] Fig.16 A schematic diagram of the motion mechanism of the rotating shaft mechanism provided in an embodiment of the present application;

[0057] Fig.17 A schematic diagram of a partial structure of a rotating shaft mechanism provided in an embodiment of the present application;

[0058] Fig.18 Another partial structural schematic diagram of the rotating shaft mechanism provided in the embodiment of the present application;

[0059] Fig.19 A schematic diagram of the partial structure of the damping module provided in an embodiment of the present application;

[0060] Fig. 20A schematic diagram of a partial explosion structure of a damping module provided in an embodiment of the present application;

[0061] Fig.21 A schematic diagram of the partial structure of another damping module provided in an embodiment of the present application.

[0062] Reference numerals:

[0063] 1-shaft mechanism; 1a-bearing surface; 1b-third appearance surface; 101-rotation module; 1011-first rotation component;

[0064] 10111-first swing arm; 101111-first arc-shaped rotating block; 1011111-first recessed portion; 1011112-first mounting groove;

[0065] 10111121-first arc surface; 10112-first support arm; 10113-first connecting member; 101131-first rotating shaft;

[0066] 1011311- second arc surface; 1011312- fourth arc surface; 101132- second rotation axis; 101133- first arc surface;

[0067] 101134-second curved surface;

[0068] 1012-second rotating assembly; 10121-second swing arm; 101211-second arc-shaped rotating block; 1012111-second recessed portion;

[0069] 1012112-second mounting groove; 10121121-fifth arc surface; 10122-second supporting arm; 10123-second connecting member;

[0070] 101231-third rotating axis; 1012311-sixth arc surface; 1012312-eighth arc surface; 101232-fourth rotating axis;

[0071] 101233-third curved surface; 101234-fourth curved surface;

[0072] 1013-first housing fixing frame; 10131-first sliding groove; 10132-first mounting portion; 10133-first limiting groove;

[0073] 101331-first opening; 101332-first guide groove; 10134-first avoidance groove; 10135-second groove;

[0074] 1014-second housing fixing frame; 10141-second slide slot; 10142-second mounting portion;

[0075] 102-main shaft; 1021-base; 10211-first arc groove; 102111-groove surface of the first arc groove;

[0076] 10212 - second arc groove; 102121 - third arc surface; 10213 - third arc groove; 102131 - groove surface of the third arc groove;

[0077] 10214- fourth arc groove; 102141- seventh arc surface;

[0078] 1022-cover plate; 10221-first protrusion; 102211-surface of the first protrusion; 10222-second protrusion;

[0079] 102221 - surface of the second protruding portion; 10223 - first plug-in portion; 10224 - third protruding portion;

[0080] 102241 - surface of the third protrusion; 10225 - fourth protrusion; 102251 - surface of the fourth protrusion;

[0081] 1023 - first track groove; 1024 - second track groove;

[0082] 103-damping module; 1031-first damping assembly; 10311-first cam; 103111-first cam surface;

[0083] 10312-second cam; 103121-second cam surface; 103122-first guide block; 10313-first elastic member;

[0084] 10314-first limit block; 10315-first guide column; 1032-second damping assembly; 10321-third cam;

[0085] 103211-third cam surface; 10322-fourth cam; 103221-fourth cam surface; 103222-second guide block;

[0086] 10323 - second elastic member; 10324 - second limit block; 10325 - second guide column;

[0087] 2-first shell; 2a-first support surface; 2b-first appearance surface;

[0088] 3-second shell; 3a-second supporting surface; 3b-second appearance surface. DETAILED DESCRIPTION

[0089] 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.

[0090] 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.

[0091] In order to facilitate understanding of the hinge mechanism provided in the embodiment of the present application, its application scenario is first described below. The hinge mechanism can be applied to, but is not limited to, foldable electronic devices such as mobile phones, personal digital assistants (PDAs), laptop computers or tablet computers. In the present application, the electronic device can be an outward-folding electronic device or an inward-folding electronic device. Among them, in the process of the outward-folding electronic device changing from an unfolded state to a closed state, the flexible display screen is always located on the outside of the electronic device. When the inward-folding electronic device is in a closed state, the flexible display screen is located on the inside of the electronic device. In the embodiment of the present application, the application of the hinge mechanism in the electronic device is described by taking an outward-folding electronic device as an example. Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application when in a closed state. In addition to the hinge mechanism 1, the electronic device may also include two shells and a flexible display screen. For the convenience of description, the two shells may be named as a first shell 2 and a second shell 3. The first shell 2 and the second shell 3 are located on both sides of the hinge mechanism 1 and can rotate around the hinge mechanism 1. When the electronic device is in use, it can be closed and unfolded according to different usage scenarios.

[0092] 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. At this time, the first surface of the hinge mechanism 1, the first surface of the first shell, and the first surface of the second shell can be used together as a flexible display screen ( Figure 1 The supporting surface is not shown in FIG. Figure 1The flexible display screen is omitted, the first surface of the hinge mechanism 1 refers to the surface of the hinge mechanism 1 facing the flexible display screen, the first surface of the first shell 2 refers to the surface of the first shell 2 facing the flexible display screen, and the first surface of the second shell 3 refers to the surface of the second shell 3 facing the flexible display screen. For ease of description, in this application, the first surface of the hinge mechanism 1 can be defined as the bearing surface 1a of the hinge mechanism 1, the first surface of the first shell 2 can be defined as the first supporting surface 2a, and the first surface of the second shell 3 can be defined as the second supporting surface 3a.

[0093] Please refer to Figure 2a , Figure 2a A schematic diagram of a structure of an electronic device in an unfolded state is shown, and Figure 2a The structure of the first supporting surface 2a of the first shell 2 and the second supporting surface 3a of the second shell 3 is shown. In the unfolded state, the bearing surface 1a of the hinge mechanism 1, the first supporting surface 2a of the first shell 2 and the second supporting surface 3a of the second shell 3 can be connected to form a flat supporting surface.

[0094] Based on this, the flexible display screen can continuously cover the bearing surface 1a of the hinge mechanism 1, the first supporting surface 2a of the first shell 2, and the second supporting surface 3a of the second shell 3. The hinge mechanism 1 is arranged corresponding to the bendable part of the flexible display screen, and the flexible display screen can be fixedly connected to the first supporting surface 2a of the first shell 2 and the second supporting surface 3a of the second shell 3, and the connection method can be but not limited to bonding. In this way, when the electronic device is in a state such as Figure 2a In the unfolded state shown, the hinge mechanism 1, the first shell 2 and the second shell 3 can play a role in flattening and supporting the flexible display screen.

[0095] In addition, please refer to Figure 2b , Figure 2b Another structural schematic diagram of an electronic device provided in an embodiment of the present application when in an unfolded state. Figure 2b , the second surface of the hinge mechanism 1, the second surface of the first shell 2, and the second surface of the second shell 3 are shown. The second surface of the hinge mechanism 1 refers to the surface of the hinge mechanism 1 facing away from the flexible display screen, the second surface of the first shell 2 refers to the surface of the first shell 2 facing away from the flexible display screen, and the second surface of the second shell 3 refers to the surface of the second shell 3 facing away from the flexible display screen. The first surface and the second surface of the hinge mechanism 1 are arranged opposite to each other, the first surface and the second surface of the first shell 2 are arranged opposite to each other, and the first surface and the second surface of the second shell 3 are arranged opposite to each other.

[0096] In the embodiment of the present application, the second surface of the hinge mechanism 1, the second surface of the first shell 2, and the second surface of the second shell 3 can be used as the appearance surface of the electronic device. For the convenience of description, the second surface of the first shell 2 can be defined as the first appearance surface 2b, the second surface of the second shell 3 can be defined as the second appearance surface 3b, and the second surface of the hinge mechanism 1 can be defined as the third appearance surface 1b. It can be understood that for an outward-folding electronic device, its appearance surface is exposed to the outside of the electronic device when the electronic device is in an unfolded state; and when the electronic device is in a closed state, its appearance surface is located on the inside of the electronic device. In the present application, the first shell 2 and the second shell 3 are composed of Figure 2a or Figure 2b The expanded state shown to Figure 1 The closed state shown, or by Figure 1 The closed state shown to Figure 2a or Figure 2b During the relative rotation of the unfolded state shown in FIG. 1 , the flexible display screen 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 2a or Figure 2b The expanded state shown to Figure 1 The closed state shown, or by Figure 1 The closed state shown to Figure 2a or Figure 2b 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 foldable part of the flexible display screen. Figure 2a or Figure 2b The expanded state shown and in Figure 1 The foldable portion of the flexible display plays an important role in supporting the foldable portion of the flexible display in the closed state shown.

[0097] Reference Figure 3 , Figure 3 for Figure 2b The schematic diagram of the partial structure of the hinge mechanism 1 of the electronic device shown in the figure. In the present application, the hinge mechanism 1 may include a rotating module 101. The number of rotating modules 101 in the hinge mechanism 1 is not limited in the present application. The hinge mechanism 1 may include one rotating module 101 or multiple rotating modules 101. When the hinge mechanism 1 includes multiple rotating modules 101, the multiple rotating modules 101 may be arranged at intervals along the axial direction of the hinge mechanism 1. In the present application, the axial direction of the hinge mechanism 1 is Figure 2bThe first shell 2 and the second shell 3 shown in the figure extend in the direction of the axis of rotation of the hinge mechanism 1. It can be understood that the first shell 2 and the second shell 3 are rotatably connected through a plurality of rotating modules 101, which can effectively improve the stability of the first shell 2 and the second shell 3 of the electronic device rotating relative to the hinge mechanism 1.

[0098] Reference Figure 4 , Figure 4 for Figure 3 The rotating module 101 may include a first rotating component 1011 and a second rotating component 1012. Figure 4 As shown, the rotating shaft mechanism 1 may further include a main shaft 102, which may serve as a bearing component for the first rotating assembly 1011 and the second rotating assembly 1012. The first rotating assembly 1011 and the second rotating assembly 1012 may rotate relative to the main shaft.

[0099] It is worth mentioning that in the embodiment of the present application, when there are multiple rotating modules 101, the first rotating components 1011 and the second rotating components 1012 of the multiple rotating modules 101 can all use the same main shaft 102 as a bearing component to improve the integration of the rotating shaft mechanism 1. In some other possible embodiments of the present application, the rotating shaft mechanism 1 can be provided with a main shaft 102 corresponding to each rotating module 101, so that the first rotating component 1011 and the second rotating component 1012 of each rotating module 101 use the corresponding main shaft 102 as a bearing component.

[0100] In addition, in order to better realize the unfolding and folding of the hinge mechanism 1, the hinge mechanism 1 of the embodiment of the present application also provides a damping module that can provide a damping force for the above-mentioned rotating module, so that the first rotating component and the second rotating component can stably rotate under the action of the damping force, so as to avoid the electronic device from being opened or closed by mistake, and realize the two shells hovering at the set position. In addition, by setting up the damping module, the user can also have a more obvious operating feel when unfolding or closing the electronic device, thereby improving the user's experience.

[0101] In order to more clearly and completely present the damping module of the present application, before specifically describing the specific configuration of the damping module of the embodiment of the present application, please refer to Figures 4 to 17 A specific implementation of the hinge mechanism is shown. In addition to realizing the damping function, the hinge mechanism can also support the flexible display screen evenly, and can make the bending part of the flexible display screen bear the force evenly in the intermediate state of the electronic device and in the process of unfolding or folding. Furthermore, the hinge mechanism can also make the length of the flexible display screen remain unchanged during the entire unfolding or folding process of the electronic device, thereby ensuring the reliability of the flexible display screen.

[0102] Next, an exemplary design of the rotating shaft mechanism will be described in detail.

[0103] You can continue to refer to Figure 4 In the embodiment of the present application, the first rotating assembly 1011 may include a first swing arm 10111, a first support arm 10112 and a first connecting member 10113. The first connecting member 10113 is located between the first swing arm 10111 and the first support arm 10112, the first connecting member 10113 is rotationally connected to the first swing arm 10111, and the first connecting member 10113 is rotationally connected to the first support arm 10112, so that the first swing arm 10111 and the first support arm 10112 perform mutual pulling motion through the first connecting member 10113. Based on this, it can be understood that the motion trajectory of the first connecting member 10113 plays a key role in the motion trajectory of the first rotating assembly 1011.

[0104] In the present application, the first connecting member 10113 can move relative to the main shaft 102. Figure 5 , Figure 5 The cross-sectional view of the first connecting member 10113 of the rotating shaft mechanism 1 provided in the embodiment of the present application when the electronic device is in the unfolded state. The main shaft 102 may be provided with a first track groove 1023, and the first connecting member 10113 may move along the first track groove 1023, thereby limiting the movement track of the first connecting member 10113.

[0105] Reference Figure 6 , Figure 6 A schematic diagram of the structure of the main shaft 102 provided in the embodiment of the present application. The main shaft 102 may include a base 1021 and a cover plate 1022. The cover plate 1022 is covered on the base 1021, and the outer surface of the cover plate 1022 may serve as the third appearance surface 1b of the rotating shaft mechanism 1. Figure 7 , Figure 7 for Figure 6 A schematic diagram of the structure of the base 1021 of the main shaft 102 is shown. The base 1021 may be provided with a first arc groove 10211, and the first arc groove 1021 ... Figure 5 and Figure 7 , the first connecting member 10113 is accommodated in the first arc-shaped groove 10211, and the first connecting member 10113 can slide along the groove surface 102111 of the first arc-shaped groove. Figure 8 , Figure 8 for Figure 6 A schematic diagram of the structure of the cover plate 1022 of the main shaft 102 is shown, and Figure 8 The structure of the cover plate 1022 facing the base 1021 is used to show the cover plate 1022. The cover plate 1022 includes a first protrusion 10221, such as Figure 5As shown, the first protrusion 10221 can be arranged toward the first arc-shaped groove 10211 , and there is a gap between the surface 102211 of the first protrusion and the groove surface 102111 of the first arc-shaped groove, and the gap serves as the first track groove 1023 .

[0106] Fig. 9 The cross-sectional view of the first connecting member 10113 of the rotating shaft mechanism 1 provided in the embodiment of the present application when the electronic device is in a closed state can be referred to in conjunction with Figure 5 and Fig. 9 When the electronic device moves from an unfolded state to a closed state, the first connecting member 10113 can move toward the first swing arm 10111 in the first trajectory groove 1023, and when the electronic device moves from a closed state to an unfolded state, the first connecting member 10113 can move toward the first support arm 10112 in the first trajectory groove 1023, so that the first connecting member 10113 can move relative to the main axis 102 according to a set trajectory.

[0107] Refer to Figure 5 and Fig. 9 It can be seen that when the electronic device is in the process of changing from the unfolded state to the closed state, or from the closed state to the unfolded state, the first swing arm 10111 and the first support arm 10112 can rotate around the main axis 102. Because the first swing arm 10111 and the first support arm 10112 are pulled by each other through the first connecting member 10113, the first connecting member 10113 can also rotate relative to the surface 102211 of the first protruding portion and the groove surface 102111 of the first arc groove during the movement in the first track groove 1023, so as to improve the smoothness of the movement of the first rotating component 1011.

[0108] Reference Fig.10 , Fig.10 A schematic diagram of the structure of the first connecting member 10113 provided in an embodiment of the present application. In the present application, the first connecting member 10113 may include a first arcuate surface 101133 and a second arcuate surface 101134. In order to realize the rotation of the first connecting member 10113 relative to the surface 102211 of the first protruding portion and the groove surface 102111 of the first arcuate groove, the first arcuate surface 101133 and the second arcuate surface 101134 may be arcuate surfaces, and the center of the first arcuate surface 101133 coincides with the center of the second arcuate surface 101134. The radii of the first arcuate surface 101133 and the second arcuate surface 101134 may be equal or unequal, which is not limited in the present application. In addition, considering the design tolerance, the first arc surface 101133 and the second arc surface 101134 can also be arc surfaces of other possible shapes such as elliptical arc surfaces, as long as the first connecting member 10113 can rotate relative to the surface 102211 of the first protrusion and the groove surface 102111 of the first arc groove.

[0109] You can continue to refer to Figure 5 and Fig. 9 , when the electronic equipment is in Figure 5 The expanded state shown and Fig. 9 In the closed state shown, the first arc surface 101133 of the first connecting member 10113 can abut against the surface 102211 of the first protrusion, and the second arc surface 101134 can abut against the groove surface 102111 of the first arc groove, so that the surface 102211 of the first protrusion and the groove surface 102111 of the first arc groove limit the first connecting member 10113 to the first track groove 1023, so that when the hinge mechanism 1 is in the expanded state and the closed state, the position of the first connecting member 10113 is relatively stable and no virtual shaking occurs, so as to improve the reliability of the hinge mechanism 1 in the above two states.

[0110] In this application, the electronic device may be placed in a Figure 5 In the unfolded state shown in FIG. 1 , the distance between the point where the surface 102211 of the first protrusion abuts against the first arc surface 101133 and the point where the groove surface 102111 of the first arc groove abuts against the second arc surface 101134 is denoted as d1. Fig. 9 In the closed state shown, the distance between the point where the surface 102211 of the first protrusion abuts against the first arc surface 101133 and the point where the groove surface 102111 of the first arc groove abuts against the second arc surface 101134 is recorded as d2. Since the first arc surface 101133 of the first connector 10113 can abut against the surface 102211 of the first protrusion, and the second arc surface 101134 can abut against the groove surface 102111 of the first arc groove when the electronic device is in the unfolded state and the closed state, when the first arc surface 101133 and the second arc surface 101134 are both arc surfaces, it can be concluded that d1=d2.

[0111] In the present application, the specific configuration of the surface 102211 of the first protruding portion and the groove surface 102111 of the first arc-shaped groove is not limited. For example, the surface 102211 of the first protruding portion can be an arc surface, and the groove surface 102111 of the first arc-shaped groove can be an arc surface. In addition, the center of the surface 102211 of the first protruding portion coincides with the center of the groove surface 102111 of the first arc-shaped groove. In some other possible embodiments of the present application, the surface 102211 of the first protruding portion and the groove surface 102111 of the first arc-shaped groove can also be set as planes, so that the first track groove 1023 is a straight groove; or the surface 102211 of the first protruding portion and the groove surface 102111 of the first arc-shaped groove can also be other forms of curved surfaces, so that the first track groove 1023 is a curved groove of any form, which should be understood to fall within the protection scope of the present application.

[0112] You can continue to refer to Figure 5 In the present application, the spacing between the surface 102211 of the first protruding portion and the groove surface 102111 of the first arc-shaped groove can be equal at all places, so that the first track groove 1023 is a groove of equal width. At this time, 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 102211 of the first protruding portion and the first arc-shaped surface 101133, and the groove surface 102111 of the first arc-shaped groove and the second arc-shaped surface 101134 are always in abutment, so that the movement trajectory of the first connecting member 10113 can be the same in the process of the electronic device from the unfolded state to the closed state, and from the closed state to the unfolded state, which can help improve the stability of the movement of the first connecting member 10113, thereby improving the movement stability of the first rotating component 1011.

[0113] Reference Fig.11 , Fig.11 Schematic diagram of the assembly structure of the first connecting member 10113 and the main shaft 102 provided in the embodiment of the present application. In the present application, when the first track groove 1023 is a groove of equal width, and the first arc surface 101133 and the second arc surface 101134 are arc surfaces, the sum of the radius R1 of the first arc surface 101133 and the radius R2 of the second arc surface 101134 is equal to the distance D between the surface 102211 of the first protrusion and the groove surface 102111 of the first arc groove. In addition, considering the smoothness of the movement of the first connecting member 10113 in the first track groove 1023, a certain design gap can be reserved between the first arc surface 101133 and the surface 102211 of the first protrusion, and / or the second arc surface 101134 and the groove surface 102111 of the first arc groove.

[0114] In some other possible embodiments of the present application, the motion trajectory of the first connecting member 10113 during the process of the electronic device changing from the unfolded state to the closed state may be different from the motion trajectory of the first connecting member 10113 during the process of the electronic device changing from the closed state to the unfolded state. In specific implementation, during the process of the electronic device changing from the unfolded state to the closed state, the first arc surface 101133 abuts against the surface 102211 of the first protruding portion, and there is a gap between the second arc surface 101134 and the groove surface 102111 of the first arc groove. And during the process of the electronic device changing from the unfolded state to the closed state, the second arc surface 101134 abuts against the groove surface 102111 of the first arc groove, and there is a gap between the first arc surface 101133 and the surface 102211 of the first protruding portion. In this embodiment, the gaps at various locations between the surface 102211 of the first protruding portion and the groove surface 102111 of the first arc groove may be different, and the first trajectory groove 1023 may be a non-uniform width groove.

[0115] As can be known from the above introduction, in the present application, the first swing arm 10111 can be rotatably connected to the main shaft 102, wherein the first swing arm 10111 and the main shaft 102 can be rotatably connected by means of a virtual axis, which can help reduce the space occupied by the first swing arm 10111 on the main shaft 102, thereby helping to reduce the volume of the rotating module 101, so as to facilitate the miniaturization design of the rotating shaft mechanism 1. In addition, it can be understood that for an outward-folding electronic device, when the first swing arm 10111 is rotatably connected to the main shaft 102 by means of a virtual axis, the axis of rotation of the first swing arm 10111 around the main shaft 102 is located on the side of the main shaft 102 away from the flexible display screen.

[0116] It is worth mentioning that in the present application, the virtual axis refers to the axis of an arc-shaped structure, and the two rotatably connected parts can rotate relative to the virtual axis, and the position of the virtual axis is fixed as the two rotatably connected parts rotate relative to each other. Fig.12 As shown, Fig.12 for Figure 3 AA cross-sectional view of the structure shown in FIG. The end of the first swing arm 10111 facing the base 1021 may be provided with a first arc-shaped rotating block 101111. Figure 7 , the base 1021 may be provided with a second arc groove 10212. Then the first arc rotating block 101111 may be accommodated in the second arc groove 10212, and the first arc rotating block 101111 may slide along the groove surface of the second arc groove 10212, so that the first swing arm 10111 is rotated around the main shaft 102 by sliding the first arc rotating block 101111 along the arc surface of the second arc groove 10212. In addition, in the present application, the first arc rotating block 101111 may be, but not limited to, a circular arc rotating block, and the second arc groove 10212 may be, but not limited to, a circular arc groove. It can be understood that when the first arc-shaped rotating block 101111 is a circular arc-shaped rotating block, its surface for contacting the groove surface of the second arc-shaped groove 10212 can be a circular arc surface, and the groove surface of the second arc-shaped groove 10212 is also a circular arc surface, and the centers of the two circular arc surfaces coincide.

[0117] Can refer to Figure 8 and Fig.12 The cover plate 1022 may include a second protrusion 10222 arranged toward the second arc groove 10212, at least a portion of the first arc-shaped rotating block 101111 is located between the second protrusion 10222 and the second arc groove 10212, and the first arc-shaped rotating block 101111 may contact the surface 102221 of the second protrusion, so that the first arc-shaped rotating block 101111 can be limited between the cover plate 1022 and the base 1021, which can effectively improve the stability of the rotation of the first arc-shaped rotating block 101111 relative to the base 1021.

[0118] It is worth mentioning that when the groove surface of the second arc groove 10212 is an arc surface, the portion of the surface 102221 of the second protruding portion that is used to contact the first arc rotating block 101111 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 101111 facing the second protruding portion 10222 can be a plane or an arc surface, as long as the first arc rotating block 101111 can rotate relative to the second protruding portion 10222.

[0119] Please refer to Fig.13 , Fig.13 The cross-sectional view of the first swing arm 10111 of the hinge mechanism 1 provided in the embodiment of the present application when the electronic device is in a closed state. In the present application, the first arc-shaped rotating block 101111 may also be provided with a first recessed portion 1011111, and the opening of the first recessed portion 1011111 is arranged toward the cover plate 1022. In addition, the end of the cover plate 1022 facing the first swing arm 10111 may be provided with a first plug-in portion 10223. In the closed state, the first plug-in portion 10223 may be inserted into the first recessed portion 1011111, and the surface of the first plug-in portion 10223 facing the second arc-shaped groove 10212 abuts against at least part of the surface of the first recessed portion 1011111. In this way, the rotation position of the first arc-shaped rotating block 101111 can be limited, and the first arc-shaped rotating block 101111 can be prevented from escaping from the second arc-shaped groove 10212, thereby improving the reliability of the connection between the first swing arm 10111 and the base 1021, and improving the structural reliability of the entire rotating shaft mechanism 1.

[0120] It is worth mentioning that in the present application, in addition to being rotatably connected to the main shaft 102 by means of a virtual shaft, the first swing arm 10111 can also be rotatably connected by means of a solid shaft, which can make the connection between the first swing arm 10111 and the main shaft 102 more reliable. It can be understood that when the first swing arm 10111 is rotatably connected to the main shaft 102 by means of a solid shaft, the axis of rotation of the first swing arm 10111 around the main shaft 102 is also located on the side of the main shaft 102 away from the flexible display screen.

[0121] In the present application, when the first swing arm 10111 is rotatably connected to the first connecting member 10113, reference can be made to Fig.10 The first connecting member 10113 may include a first rotating shaft 101131 and a second rotating shaft 101132, and the axis of the first rotating shaft 101131 is parallel to the axis of the second rotating shaft 101132 but does not overlap.

[0122] In addition, refer to Fig.14 , Fig.14A schematic diagram of the structure of the first rotating assembly 1011 provided in an embodiment of the present application. The first connecting member 10113 is rotatably connected to the first swing arm 10111 via a first rotating shaft 101131, and the first connecting member 10113 is rotatably connected to the first support arm 10112 via a second rotating shaft 101132. Thus, the first swing arm 10111 and the first support arm 10112 can be pulled against each other via the first connecting member 10113.

[0123] Reference Fig.15 , Fig.15 1 is a schematic diagram of a structure of the first swing arm 10111 provided in an embodiment of the present application. The first arc-shaped rotating block 101111 of the first swing arm 10111 is provided with a first mounting groove 1011112. Fig.12 and Fig.15 , the slot opening of the first mounting groove 1011112 is set toward the second arc-shaped groove 10212, then the first rotating shaft 101131 can be installed in the first mounting groove 1011112, and a portion of the surface of the first rotating shaft 101131 can contact the slot surface of the first mounting groove 1011112, and a portion of the surface of the first rotating shaft 101131 contacts the slot surface of the second arc-shaped groove 10212 to limit the first rotating shaft 101131 to the first mounting groove 1011112.

[0124] You can continue to refer to Fig.12 and Fig.15 , the groove surface of the first installation groove 1011112 may include a first arc surface 10111121, and the surface of the first rotating shaft 101131 for contacting the groove surface of the first installation groove 1011112 is a second arc surface 1011311, and the center of the first arc surface 10111121 coincides with the center of the second arc surface 1011311. In addition, referring to Figure 7 , the groove surface of the second arc groove 10212 can be the third arc surface 102121. Fig.12 As shown, the surface of the first rotating shaft 101131 for contacting the groove surface of the second arc groove 10212 may be the fourth arc surface 1011312, and the center of the third arc surface 102121 coincides with the center of the fourth arc surface 1011312. Fig.12 and Fig.13 While the first rotating shaft 101131 slides along the groove surface of the second arc groove 10212 with the first arc-shaped rotating block 101111, the first rotating shaft 101131 can also be rotated relative to the first arc-shaped rotating block 101111, thereby facilitating the movement of the first connecting member 10113 relative to the main shaft 102.

[0125] In the present application, when the first connecting member 10113 is rotatably connected to the first supporting arm 10112, as shown in FIG. Fig.14As shown, the second rotating shaft 101132 can be simultaneously provided through the first connecting member 10113 and the first supporting arm 10112, so the connection method between the first connecting member 10113 and the first supporting arm 10112 is relatively simple, which is conducive to simplifying the structure of the first rotating assembly 1011, thereby simplifying the structure of the rotating shaft mechanism 1. It is worth mentioning that when the first arc surface 101133 and the second arc surface 101134 of the first connecting member 10113 are both arc surfaces, the center of the first arc surface 101133, the center of the second arc surface 101134 and the axis of the second rotating shaft 101132 coincide.

[0126] It can be understood that in the rotating shaft mechanism 1 provided in the embodiment of the present application, the first connecting member 10113 can include a plurality of first sub-connecting members that are rotatably connected in sequence. In addition, the plurality of first sub-connecting members can be located between the first swing arm 10111 and the first support arm 10112, and the first swing arm 10111 can be rotatably connected to the adjacent first sub-connecting member, and the first support arm 10112 can be rotatably connected to the adjacent first sub-connecting member. Among them, the manner of rotatably connecting the first swing arm 10111 to the adjacent first sub-connecting member, and the manner of rotatably connecting the first support arm 10112 to the adjacent first sub-connecting member can be specifically set with reference to the above description of the rotatably connecting the first swing arm 10111 and the first support arm 10112 to the first connecting member 10113, and will not be repeated here. In the present application, by setting the first connecting member 10113 as a plurality of first sub-connecting members that are rotatably connected in sequence, so that the first swing arm 10111 and the first support arm 10112 are connected through a plurality of first sub-connecting members, the speed uniformity of the first swing arm 10111 and the first support arm 10112 during the rotation process around the main axis 102 can be effectively improved, so as to enhance the smoothness of the mutual pulling movement of the first swing arm 10111 and the first support arm 10112.

[0127] You can continue to refer to Figure 4In the embodiment of the present application, the rotating shaft mechanism 1 may further include a first housing fixing frame 1013 and a second housing fixing frame 1014, the first housing fixing frame 1013 and the second housing fixing frame 1014 are respectively arranged on opposite sides of the main shaft 102, and the first rotating assembly 1011 is located between the first housing fixing frame 1013 and the second housing fixing frame 1014. The first swing arm 10111 is slidably connected with the first housing fixing frame 1013. In a specific implementation, the first housing fixing frame 1013 is provided with a first slide groove 10131. The first slide groove 10131 extends along a first direction, the first swing arm 10111 may be installed in the first slide groove 10131, and may slide in the first slide groove 10131 along a first direction. The first direction may be the direction in which the first housing fixing frame 1013 moves toward or away from the base 1021. In addition, in order to prevent the first swing arm 10111 from falling off from the first slide groove 10131, a first slideway can be provided on the groove wall of the first slide groove 10131, and a first slider can be provided on the first swing arm 10111. In this way, the first slider can be clamped on the first slideway and can slide along the first slideway to limit the position of the first swing arm 10111 in the first slide groove 10131. In addition, by providing the first slideway on the groove wall of the first slide groove 10131, it can provide guidance for the first swing arm 10111 to slide along the first slide groove 10131, thereby improving the stability of the movement of the first swing arm 10111.

[0128] In the present application, the first support arm 10112 can be rotatably connected to the second housing fixing frame 1014. Figure 4 The second housing fixing frame 1014 has a second mounting portion 10142. The end of the first support arm 10112 facing the second housing fixing frame 1014 is mounted on the second mounting portion 10142, and the end of the first support arm 10112 facing the second housing fixing frame 1014 is rotatably connected to the second mounting portion 10142.

[0129] In the embodiment of the present application, the specific manner in which the end of the first support arm 10112 facing the second housing fixing frame 1014 is rotatably connected to the second mounting portion 10142 is not limited. Figure 4 The second mounting portion 10142 may be provided with a first mounting hole, and the end of the first support arm 10112 facing the second shell fixing frame 1014 may be provided with a second mounting hole, then the end of the first support arm 10112 facing the first shell fixing frame 1013 may be rotatably connected to the second mounting portion 10142 via a rotating shaft that passes through both the first mounting hole and the second mounting hole.

[0130] You can continue to refer to Figure 4, similar to the structure of the first rotating component 1011, when the second rotating component 1012 is specifically set, the second rotating component 1012 is located between the first shell fixing frame 1013 and the second shell fixing frame 1014. In addition, the second rotating component 1012 may include a second swing arm 10121, a second support arm 10122 and a second connecting member 10123. Among them, the second connecting member 10123 is located between the second swing arm 10121 and the second support arm 10122, the second connecting member 10123 is rotationally connected to the second swing arm 10121, and the second connecting member 10123 is rotationally connected to the second support arm 10122. In the present application, when the second connecting member 10123 is rotationally connected to the second swing arm 10121 and the first support arm 10112, it can be set with reference to the above-mentioned way of rotationally connecting the first connecting member 10113 with the second swing arm 10121 and the second support arm 10122. Exemplarily, reference can be made to Fig.10 , Fig.10 It can also be used to represent the structure of the second connecting member 10123 provided in the embodiment of the present application. The second connecting member 10123 may include a third rotating shaft 101231 and a fourth rotating shaft 101232, and the axis of the third rotating shaft 101231 is parallel to and does not overlap with the axis of the fourth rotating shaft 101232. Among them, the second connecting member 10123 and the second swing arm 10121 can be rotatably connected through the third rotating shaft 101231, and the second connecting member 10123 and the second support arm 10122 can be rotatably connected through the fourth rotating shaft 101232, so that the second swing arm 10121 and the second support arm 10122 can perform mutual pulling motion through the second connecting member 10123.

[0131] In addition, refer to Figure 6 , the spindle 102 may be provided with a second track groove 1024, and the second connecting member 10123 may move along the second track groove, thereby limiting the movement track of the second connecting member 10123. Figure 7 The base 1021 may be provided with a third arc groove 10213, the second connecting member 10123 is accommodated in the third arc groove 10213, and the second connecting member 10123 can slide along the groove surface of the third arc groove 10213. Figure 8 The cover plate 1022 includes a third protrusion 10224, which can be directed toward Figure 7 The third arc groove 10213 of the middle base 1021 is set, and there is a gap between the surface 102241 of the third protrusion and the groove surface 102131 of the third arc groove, and the gap serves as the second track groove 1024.

[0132] In this application, if Fig.10As shown, the second connecting member 10123 may include a third arcuate surface 101233 and a fourth arcuate surface 101234. When the electronic device is in the unfolded state and the closed state, the third arcuate surface 101233 of the second connecting member 10123 may abut against the surface 102241 of the third protruding portion, and the fourth arcuate surface 101234 abuts against the groove surface 102131 of the third arcuate groove, so that the surface 102241 of the third protruding portion and the groove surface 102131 of the third arcuate groove limit the second connecting member 10123 to the second track groove 1024, so that when the rotating shaft mechanism 1 is in the unfolded state and the closed state, the position of the second connecting member 10123 is relatively stable, and no virtual position shaking occurs, so as to improve the structural reliability of the rotating shaft mechanism 1 in the above two states.

[0133] In the embodiment of the present application, the third arc surface 101233 of the second connecting member 10123 can be set with reference to the first arc surface 101133 of the first connecting member 10113, and the fourth arc surface 101234 can be set with reference to the second arc surface 101134 of the first connecting member 10113, which will not be described in detail here. In addition, the second track groove 1024 can be specifically set with reference to the first track groove 1023. In short, the spacing between the surface 102241 of the third protruding portion and the groove surface 102131 of the third arc groove is equal at all places, so that the second track groove 1024 is a groove of equal width. At this time, in the process of the electronic device changing from the unfolded state to the closed state, and from the closed state to the unfolded state, the surface 102241 of the third protruding portion and the third arc surface 101233, and the groove surface 102131 of the third arc groove and the fourth arc surface 101234 are always in abutment. Thus, in the process of the electronic device changing from the unfolded state to the closed state and from the closed state to the unfolded state, the movement track of the second connecting member 10123 in the second track groove 1024 is the same. Alternatively, in the process of the electronic device changing from the unfolded state to the closed state, the third arc surface 101233 abuts against the surface 102241 of the third protruding portion, and there is a gap between the fourth arc surface 101234 and the groove surface 102131 of the third arc groove; in the process of the electronic device changing from the closed state to the unfolded state, the fourth arc surface 101234 abuts against the groove surface 102131 of the third arc groove, and there is a gap between the third arc surface 101233 and the surface 102241 of the third protruding portion, so that the movement track of the second connecting member 10123 in the process of the electronic device changing from the unfolded state to the closed state is different from the movement track of the second connecting member 10123 in the process of the electronic device changing from the closed state to the unfolded state.

[0134] In the present application, the second swing arm 10121 is rotatably connected to the main shaft 102. The second swing arm 10121 and the main shaft 102 can be rotatably connected by a virtual axis. Figure 7As shown, the base 1021 may be provided with a fourth arc groove 10214. Figure 4 and Fig.15 , Fig.15 It can also be used to demonstrate the structure of the second swing arm 10121. The second swing arm 10121 is provided with a second arc-shaped rotating block 101211 at one end facing the base 1021, wherein the second arc-shaped rotating block 101211 may be, but not limited to, a circular arc-shaped rotating block, and the fourth arc-shaped groove 10214 may be, but not limited to, a circular arc-shaped groove. The second arc-shaped rotating block 101211 can be accommodated in the fourth arc-shaped groove 10214, and can slide along the groove surface of the fourth arc-shaped groove 10214, so that the second swing arm 10121 can be rotated around the base 1021 by sliding the second arc-shaped rotating block 101211 along the groove surface of the fourth arc-shaped groove 10214. This can help reduce the space occupied by the second swing arm 10121 on the main shaft 102, thereby helping to reduce the volume of the rotating module 101, so as to facilitate the miniaturization design of the rotating shaft mechanism 1. It can be understood that, for an outward-folding electronic device, when the second swing arm 10121 is rotationally connected to the main shaft 102 via a virtual axis, the axis of rotation of the second swing arm 10121 around the main shaft 102 is located on the side of the hinge mechanism away from the flexible display screen.

[0135] In addition, in the present application, the second arc-shaped rotating block 101211 may be, but not limited to, a circular arc-shaped rotating block, and the fourth arc-shaped groove 10214 may be, but not limited to, a circular arc-shaped groove. It is understandable that when the second arc-shaped rotating block 101211 is a circular arc-shaped rotating block, its surface for contacting the groove surface of the fourth arc-shaped groove 10214 may be a circular arc surface, and the groove surface of the fourth arc-shaped groove 10214 is also a circular arc surface, and the centers of the two circular arc surfaces coincide.

[0136] In the present application, in order to improve the stability of the second swing arm 10121 rotating around the main axis 102. Figure 8As shown, the cover plate 1022 further includes a fourth protrusion 10225 disposed toward the fourth arc groove 10214, at least a portion of the second arc-shaped rotating block 101211 is located between the fourth protrusion 10225 and the fourth arc groove 10214, and the surface of the second arc-shaped rotating block 101211 facing the fourth protrusion 10225 can contact the surface 102251 of the fourth protrusion, so that the second arc-shaped rotating block 101211 can be limited between the cover plate 1022 and the base 1021, which can effectively improve the stability of the second arc-shaped rotating block 101211 relative to the base 1021. In addition, when the groove surface of the fourth arc groove 10214 is an arc surface, the portion of the surface 102251 of the fourth protrusion that is used to contact the second arc-shaped rotating block 101211 can also be an arc surface, and the centers of the two arc surfaces coincide. In the present application, the surface of the second arc-shaped rotating block 101211 facing the fourth protrusion 10225 can be a plane or an arc surface, as long as the second arc-shaped rotating block 101211 can rotate relative to the fourth protrusion 10225 while sliding along the groove surface of the fourth arc-shaped groove 10214.

[0137] In order to improve the reliability of the connection between the second swing arm 10121 and the base 1021, the second arc-shaped rotating block 101211 may also be provided with a second recessed portion 1012111, and the opening of the second recessed portion 1012111 is arranged toward the cover plate 1022. In addition, the end of the cover plate 1022 facing the second housing fixing frame 1014 may be provided with a second plug-in portion. In this closed state, the second plug-in portion may be inserted into the second recessed portion 1012111, and the surface of the second plug-in portion facing the fourth arc-shaped groove 10214 abuts against at least part of the surface of the second recessed portion 1012111. In this way, the rotation position of the second arc-shaped rotating block 101211 can be limited, thereby preventing the second arc-shaped rotating block 101211 from coming out of the fourth arc-shaped groove 10214.

[0138] It is worth mentioning that in the present application, in addition to being rotatably connected to the main shaft 102 through a virtual shaft, the second swing arm 10121 can also be rotatably connected through a solid shaft, which can make the connection between the first swing arm 10111 and the main shaft 102 more reliable. For an outward-folding electronic device, when the second swing arm 10121 is rotatably connected to the main shaft 102 through a solid shaft, the axis of rotation of the second swing arm 10121 around the main shaft 102 is also located on the side of the rotating shaft mechanism away from the flexible display screen.

[0139] When the second connecting member 10123 is rotatably connected to the second swing arm 10121 through the third rotating shaft 101231, the following can be referred to: Fig.15The second arc-shaped rotating block 101211 is provided with a second mounting groove 1012112, and the groove opening of the second mounting groove 1012112 is arranged toward the fourth arc-shaped groove 10214. Then, the third rotating shaft 101231 can be installed in the second mounting groove 1012112, and a part of the surface of the third rotating shaft 101231 can contact the groove surface of the second mounting groove 1012112, and a part of the surface of the third rotating shaft 101231 contacts the groove surface of the fourth arc-shaped groove 10214, so as to limit the third rotating shaft 101231 to the second mounting groove 1012112.

[0140] like Fig.15 As shown, in the present application, the groove surface of the second installation groove 1012112 may include a fifth arc surface 10121121, and as shown in Fig.10 The surface of the third rotating shaft 101231 used for contacting the groove surface of the second installation groove 1012112 is the sixth arc surface 1012311, and the center of the fifth arc surface 10121121 coincides with the center of the sixth arc surface 1012311. In addition, the groove surface of the fourth arc groove 10214 is the seventh arc surface 102141, and the surface of the third rotating shaft 101231 used for contacting the groove surface of the fourth arc groove 10214 may be the eighth arc surface 1012312, then the center of the seventh arc surface 102141 coincides with the center of the eighth arc surface 1012312. In this way, while the third rotating shaft 101231 slides along the groove surface of the fourth arc-shaped groove 10214 with the second arc-shaped rotating block 101211, the third rotating shaft 101231 can also rotate relative to the second arc-shaped rotating block 101211, thereby facilitating the movement of the second connecting member 10123 relative to the main shaft 102.

[0141] In the embodiment of the present application, when the second connecting member 10123 and the second support arm 10122 are rotatably connected via the fourth rotating shaft 101232, the fourth rotating shaft 101232 can be simultaneously passed through the second connecting member 10123 and the second support arm 10122. The connection method between the second connecting member 10123 and the second support arm 10122 is relatively simple, which is conducive to simplifying the structure of the second rotating component 1012, thereby simplifying the structure of the rotating shaft mechanism 1.

[0142] It is understandable that in the rotating shaft mechanism 1 provided in the embodiment of the present application, the second connecting member 10123 may include a plurality of second sub-connecting members that are rotatably connected in sequence. In addition, the plurality of second sub-connecting members may be located between the second swing arm 10121 and the second support arm 10122, and the second swing arm 10121 may be rotatably connected to the adjacent second sub-connecting member, and the second support arm 10122 may be rotatably connected to the adjacent second sub-connecting member. Among them, the manner of rotatably connecting the second swing arm 10121 to the adjacent second sub-connecting member, and the manner of rotatably connecting the second support arm 10122 to the adjacent second sub-connecting member may be specifically set with reference to the above description of the rotatably connecting the second swing arm 10121 and the second support arm 10122 to the second connecting member 10123, and will not be described in detail here. In the present application, by setting the second connecting member 10123 as a plurality of second sub-connecting members that are rotatably connected in sequence, so that the second swing arm 10121 and the second support arm 10122 are rotatably connected through a plurality of second sub-connecting members, the speed uniformity of the second swing arm 10121 and the second support arm 10122 during the rotation around the main axis 102 can be effectively improved, so as to enhance the smoothness of the mutual pulling movement of the second swing arm 10121 and the second support arm 10122.

[0143] Reference Fig.16 , Fig.16The schematic diagram of the motion mechanism of the hinge mechanism provided in the embodiment of the present application. Based on the hinge mechanism 1 provided in the above embodiment of the present application, when the electronic device changes from the unfolded state to the closed state, the first shell fixing frame 1013 and the second shell fixing frame 1014 move toward each other, and when the first shell fixing frame 1013 drives the first swing arm 10111 to rotate clockwise around the main shaft 102, the first swing arm 10111 can slide along the groove surface of the second arc groove 10212, thereby driving the first connecting member 10113 to move toward the first swing arm 10111 in the first track groove 1023 of the main shaft 102. Because the first connecting member 10113 is rotatably connected to the first support arm 10112, the first connecting member 10113 can drive the first support arm 10112 to rotate counterclockwise around the main shaft 102 during the process of moving toward the first swing arm 10111 in the first track groove 1023 of the main shaft 102, thereby driving the second shell fixing frame 1014 to rotate counterclockwise around the main shaft 102 through the first support arm 10112. When the electronic device moves from a closed state to an unfolded state, the first shell fixing frame 1013 and the second shell fixing frame 1014 move in opposite directions. When the first shell fixing frame 1013 drives the first swing arm 10111 to rotate counterclockwise around the main axis 102, the first swing arm 10111 can drive the first connecting member 10113 to move toward the first support arm 10112 in the first track groove 1023 of the main axis 102, thereby driving the first support arm 10112 to rotate clockwise around the main axis 102, so as to drive the second shell fixing frame 1014 to rotate clockwise around the main axis 102 through the first support arm 10112, thereby realizing the folding and unfolding functions of the hinge mechanism 1.

[0144] Through the above structural relationship, the cross section of the first connecting member 10113 can be made smaller so as to shuttle in the first track groove 1023 of the main shaft 102. At the same time, since the first connecting member 10113 has a sufficient length to extend in the direction perpendicular to the axis and is respectively connected to the first swing arm 10111 and the first support arm 10112, the reliability of the rotating shaft mechanism 1 can be guaranteed. In this way, the thickness of the main shaft 102 and the thickness of the whole machine can be reduced, and the reliability of the rotating shaft mechanism 1 can be maintained, making the entire rotating shaft mechanism 1 thin and reliable.

[0145] In addition, since the first connecting member 10113 can move along a set track in the first track groove 1023, it is possible to avoid uncontrolled movement of the first connecting member 10113 during the entire folding and unfolding process, thereby avoiding random movement of the first shell fixing frame 1013 and the second shell fixing frame 1014, thereby ensuring the structural and motion stability of the entire hinge mechanism 1. In some cases, by reasonably designing the first track groove 1023, 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, thus effectively avoiding squeezing or pulling on the flexible display screen, thereby improving the structural reliability of the flexible display screen, and thereby improving the structural reliability of the electronic device.

[0146] Can refer to again Figure 4 In the embodiment of the present application, the second rotating assembly 1012 can also be located between the first housing fixing frame 1013 and the second housing fixing frame 1014. The second swing arm 10121 can be slidably connected with the second housing fixing frame 1014. In specific implementation, the second housing fixing frame 1014 is provided with a second slide groove 10141. The second slide groove 10141 is spaced apart from the second mounting portion 10142 along the length direction of the rotating shaft mechanism 1. The second slide groove 10141 extends along the second direction, and the second swing arm 10121 can be installed in the second slide groove 10141 and can slide in the second slide groove 10141 along the second direction. The second direction can be the direction in which the second housing fixing frame 1014 moves toward or away from the base 1021. In addition, in order to prevent the second swing arm 10121 from falling off from the second slide groove 10141, a second slideway can be provided on the groove wall of the second slide groove 10141, and a second slider can be provided on the second swing arm 10121. In this way, the second slider can be clamped in the second slideway and can slide along the second slideway to limit the second swing arm 10121 in the second slide groove 10141. In addition, by arranging the second slideway on the groove wall of the second slide groove 10141, it can provide a guide for the second swing arm 10121 to slide along the second slide groove 10141, thereby improving the stability of the movement of the second swing arm 10121.

[0147] In addition, the second support arm 10122 can be rotatably connected to the first housing fixing frame 1013. In a specific implementation, the first housing fixing frame 1013 has a first mounting portion 10132, and along the length direction of the rotating shaft mechanism 1, the first mounting portion 10132 is spaced apart from the first slide groove 10131. The end of the second support arm 10122 facing the first housing fixing frame 1013 is mounted on the first mounting portion 10132, and the end of the second support arm 10122 facing the first housing fixing frame 1013 is rotatably connected to the first mounting portion 10132.

[0148] In the embodiment of the present application, the specific manner in which the end of the second support arm 10122 facing the first housing fixing frame 1013 is rotatably connected to the first mounting portion 10132 is not limited. Figure 4 The first mounting portion 10132 may be provided with a third mounting hole, and the end of the second support arm 10122 facing the first shell fixing frame 1013 may be provided with a fourth mounting hole, then the end of the second support arm 10122 facing the first shell fixing frame 1013 may be rotatably connected to the first mounting portion 10132 via a rotating shaft that is simultaneously provided through the third mounting hole and the fourth mounting hole.

[0149] Based on the hinge mechanism 1 provided in the above embodiment of the present application, when the electronic device changes from the unfolded state to the closed state, the first housing fixing frame 1013 and the second housing fixing frame 1014 move toward each other, and when the second housing fixing frame 1014 drives the second swing arm 10121 to rotate counterclockwise around the main shaft 102, the second swing arm 10121 can drive the second connecting member 10123 to move toward the second swing arm 10121 in the second track groove 1024 of the main shaft 102. Because the second connecting member 10123 is rotatably connected to the second support arm 10122, when the second connecting member 10123 moves toward the second swing arm 10121 in the second track groove 1024 of the main shaft 102, the second support arm 10122 can be driven to rotate clockwise around the main shaft 102, thereby driving the first housing fixing frame 1013 to rotate clockwise around the main shaft 102 through the second support arm 10122. When the electronic device moves from the closed state to the unfolded state, the first housing fixing frame 1013 and the second housing fixing frame 1014 move in opposite directions. When the second housing fixing frame 1014 drives the second swing arm 10121 to rotate clockwise around the main axis 102, the second swing arm 10121 can drive the second connecting member 10123 to move toward the second support arm 10122 in the second track groove 1024 of the main axis 102, and can drive the second support arm 10122 to rotate counterclockwise around the main axis 102, and the first housing fixing frame 1013 is driven to rotate counterclockwise around the main axis 102 through the second support arm 10122. Thus, the folding and unfolding functions of the hinge mechanism 1 are realized.

[0150] Through the above structural relationship, the cross section of the second connecting member 10123 can be made smaller so as to shuttle in the second track groove 1024 of the main shaft 102. At the same time, since the second connecting member 10123 has a sufficient length to extend in the direction perpendicular to the axis and is connected to the second swing arm 10121 and the second support arm 10122 respectively, the reliability of the rotating shaft mechanism 1 can be ensured. In this way, the thickness of the main shaft 102 and the thickness of the whole machine can be reduced, and the reliability of the rotating shaft mechanism 1 can be maintained, making the entire rotating shaft mechanism 1 thin and reliable.

[0151] Since the second connecting member 10123 can move along a set track, it is possible to avoid uncontrolled movement of the second connecting member 10123 during the entire folding and unfolding process, thereby avoiding random movement of the first shell fixing frame 1013 and the second shell fixing frame 1014, thereby ensuring the structural and movement stability of the entire hinge mechanism 1. In some cases, by reasonably designing the second track groove 1024, 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, thus effectively avoiding squeezing or pulling on the flexible display screen, thereby improving the structural reliability of the flexible display screen, and thereby improving the structural reliability of the electronic device.

[0152] Reference Fig.17 , Fig.17 A partial structural diagram of the rotating shaft mechanism 1 provided in the embodiment of the present application is shown in FIG. Fig.17 The main shaft is omitted in order to facilitate the description of the mutual pulling movement relationship between the first rotating component 1011 and the second rotating component 1012. In the present application, the first swing arm 10111 is slidably connected to the first shell fixing frame 1013, the first support arm 10112 is rotatably connected to the second shell fixing frame 1014, and the first swing arm 10111 can pull the first support arm 10112 to move along a set trajectory through the first connecting member 10113; the second swing arm 10121 is slidably connected to the second shell fixing frame 1014, the second support arm 10122 is rotatably connected to the first shell fixing frame 1013, and the second swing arm 10121 can pull the second support arm 10122 to move along a set trajectory through the second connecting member 10123. In this way, the movement distance of the first shell fixing frame 1013 and the second shell fixing frame 1014 toward or away from the main shaft 102 can be limited, so that when the electronic device is in any folded state, the distances between the first shell fixing frame 1013 and the second shell fixing frame 1014 and the main shaft 102 are equal. In addition, when the electronic device changes from the unfolded state to the closed state and from the closed state to the unfolded state, the distances of the first shell fixing frame 1013 moving relative to the main shaft 102 can be equal, and the distances of the second shell fixing frame 1014 moving relative to the main shaft 102 can be equal, so that the hinge mechanism 1 can be applied to Figure 2b In the electronic device shown in the figure, the extended length of the supporting surface formed by the first shell, the second shell and the hinge mechanism 1 in the unfolded state can be adapted to the flattened length of the flexible display screen, and when the electronic device is in the closed state, the folding requirement of the foldable part of the flexible display screen can be met, thereby avoiding deformation of the flexible display screen and reducing the squeezing or pulling stress on the flexible display screen, thereby extending the service life of the flexible display screen and improving the reliability of the electronic device.

[0153] After introducing the rotating module of the hinge mechanism, the damping module is further described in detail below. It should be understood that the above embodiment is only one possible implementation method of the rotating module for realizing the folding and unfolding functions of the electronic device. In other embodiments, the rotating module can also be implemented in other ways. The damping module involved in the embodiment of the present application can be applied to any hinge mechanism in which the swing arm of the rotating module is slidably connected to the housing fixing frame.

[0154] Please refer again Figure 4 In the embodiment of the present application, the shaft mechanism 1 may include one damping module or multiple damping modules. When the shaft mechanism 1 includes one damping module, the one damping module may be arranged corresponding to one of the rotating modules 101 of the shaft mechanism. When the shaft mechanism includes multiple damping modules, the multiple damping modules may be arranged at intervals along the axial direction of the shaft mechanism 1, and the multiple damping modules may be arranged one-to-one corresponding to the multiple rotating modules 101 of the shaft mechanism 1.

[0155] In this embodiment, the damping module may include a first damping component 1031 and a second damping component 1032. The first damping component 1031 and the second damping component 1032 are respectively arranged on both sides of the main shaft, and the first damping component 1031 is arranged corresponding to the first rotating component 1011, and the second damping component 1032 is arranged corresponding to the second rotating component 1012.

[0156] Fig.18 This is another partial structural schematic diagram of the rotating shaft mechanism 1 provided in an embodiment of the present application. Fig.19 Schematic diagram of the partial structure of the damping module 103 provided in the embodiment of the present application, Fig. 20 This is a schematic diagram of a partial explosion structure of the damping module 103 provided in an embodiment of the present application. Figures 18 to 20As shown, in the embodiment of the present application, the first damping assembly 1031 may include a first cam 10311, a second cam 10312, a first elastic member 10313 and a first stop block 10314. The first cam 10311 may be arranged on one side of the first swing arm 10111 along the axial direction of the shaft mechanism 1, and the first cam 10311 has a first cam surface 103111 on the side away from the first swing arm 10111; the second cam 10312 may be arranged on the side of the first cam 10311 away from the first swing arm 10111, and the second cam 10312 is slidably arranged on the first housing fixing frame 1013 along the axial direction of the shaft mechanism 1, and the second cam 10312 has a first cam surface 103111 on the side facing the first cam 10311. The second cam surface 103121; the first limit block 10314 is arranged on the side of the second cam 10312 away from the first swing arm 10111, and the first limit block 10314 is fixed to the first shell fixing frame 1013; the first elastic member 10313 is limited between the second cam 10312 and the first limit block 10314, thereby applying an elastic force to the second cam 10312, so that the second cam surface 103121 of the second cam 10312 abuts against the first cam surface 103111 of the first cam 10311.

[0157] In a specific implementation, the first cam 10311 can be fixed to the side of the first swing arm 10111 by bonding, welding or riveting. Alternatively, the first cam 10311 can also be an integrally formed structure with the first swing arm 10111, and it can also be understood that the first cam surface 103111 can be directly formed on the side of the first swing arm 10111, which helps to simplify the manufacturing and assembly process of the rotating shaft mechanism 1.

[0158] In this embodiment, the first shell fixing frame 1013 may be provided with a first limiting groove 10133, which may extend along the axial direction of the rotating shaft mechanism 1, and the first limiting groove 10133 has a first opening 101331 arranged toward the first swing arm 10111. At this time, the first limiting block 10314 may be fixed in the first limiting groove 10133, and the second cam 10312 may be slidably arranged in the first limiting groove 10133, and the second cam surface 103121 of the second cam 10312 may abut against the first cam surface 103111 of the first cam 10311 through the first opening 101331. In this way, on the one hand, the first limiting groove 10133 can be used to limit the moving direction of the second cam 10312 driven by the first elastic member 10313, thereby improving the structural stability and reliability of the first damping assembly 1031; on the other hand, the second cam 10312 can be overlapped or partially overlapped with the first shell fixing frame 1013 in the thickness direction of the hinge mechanism 1, thereby reducing the thickness of the hinge mechanism 1, and further helping to achieve a lightweight design for electronic equipment using the hinge mechanism 1.

[0159] In one implementation, the groove wall of the first limiting groove 10133 opposite to the side where the first opening 101331 is located can be formed as a first limiting block 10314, that is, the first limiting block 10314 and the first shell fixing frame 1013 are an integral structure, which can simplify the structure of the rotating shaft mechanism 1 and improve the structural compactness of the rotating shaft mechanism 1.

[0160] In another implementation, the first limit block 10314 can also be fixed in the first limit groove 10133 by bonding, welding or riveting, for example, it can be fixed to the side of the first limit groove 10133 opposite to the side where the first opening 101331 is located. This design of making the first limit block 10314 and the first shell fixing frame 1013 independent of each other can reduce the difficulty of processing the first limit block 10314 and the first shell fixing frame 1013, thereby helping to reduce the processing cost of the shaft mechanism 1.

[0161] Continue to refer Figures 18 to 20 In the embodiment of the present application, the groove wall of the first limiting groove 10133 may be provided with a first guide groove 101332, and the first guide groove 101332 extends along the axial direction of the rotating shaft mechanism 1. The side of the second cam 10312 may be provided with a first guide block 103122, and the first guide block 103122 is located in the first guide groove 101332 and can slide in the first guide groove 101332. Through the cooperation of the first guide block 103122 and the first guide groove 101332, on the one hand, the sliding direction of the second cam 10312 in the first limiting groove 10133 can be limited, and on the other hand, the sliding of the second cam 10312 in the first limiting groove 10133 can be guided, thereby reducing the risk of the second cam 10312 slipping in the first limiting groove 10133 and improving the movement stability of the second cam 10312.

[0162] In a specific implementation, the two side groove walls of the first limiting groove 10133 may be respectively provided with first guide grooves 101332, and correspondingly, the two side surfaces of the second cam 10312 may be respectively provided with first guide blocks 103122, so that the second cam 10312 can be guided and limited by utilizing the cooperation of the guide blocks and the guide grooves on both sides of the second cam 10312, thereby further improving the movement stability of the second cam 10312. In addition, a first avoidance groove 10134 can be further provided on the first shell fixing frame 1013, and the first avoidance groove 10134 is connected to the first guide groove 101332. When the first cam 10311 is installed in the first limiting groove 10133, the first avoidance groove 10134 can avoid the first guide block 103122 of the second cam 10312, so that the first guide block 103122 of the second cam 10312 can pass through the first avoidance groove 10134 and smoothly enter the first guide groove 101332, thereby reducing the difficulty of installing the second cam 10312 on the first shell fixing frame 1013.

[0163] Continue to refer Figures 18 to 20 In some embodiments, the first elastic member 10313 may be a spring. The number of springs may be set according to the damping force required to be provided by the first damping assembly 1031 and the space of the rotating shaft mechanism 1 and other parameters. For example, the figure shows a case of two springs, and the two springs may be arranged in parallel between the second cam 10312 and the first stop block 10314. In addition, the first damping assembly 1031 may also include a first guide column 10315 respectively arranged corresponding to each spring, and the first guide column 10315 may be fixed to the side of the first stop block 10314 facing the second cam 10312, or may be fixed to the side of the second cam 10312 facing the first stop block 10314, and the present application does not limit this. The first guide column 10315 extends along the axial direction of the rotating shaft mechanism 1, and the spring may be sleeved on the corresponding first guide column 10315, so as to reduce the risk of displacement of the spring when elastic deformation occurs.

[0164] Of course, in some other embodiments, the first elastic member 10313 may also be a spring sheet, and the number of spring sheets may be multiple, and the multiple spring sheets may be stacked between the second cam 10312 and the first limit block 10314 .

[0165] In a specific implementation, a first groove (not shown) may be provided on the side of the second cam 10312 facing the first housing fixing frame 1013, and a second groove 10135 may be provided at a position of the first housing fixing frame 1013 corresponding to the first groove. After the second cam 10312 is installed on the first housing fixing frame 1013, the first groove and the second groove 10135 may be combined to form a space, and the first elastic member 10313 may be provided in the space. It should be understood that when the first housing fixing frame 1013 is provided with a first limiting groove 10133, the second groove 10135 may be specifically provided on the bottom wall of the first limiting groove 10133.

[0166] Through the above design, the first elastic member 10313 can be limited by the space formed by the first groove and the second groove 10135, and since the space is formed by the two grooves, the depths of the two grooves are relatively small. In this way, the thickness of the second cam 10312 and the first shell fixing frame 1013 can be appropriately reduced without affecting the structural strength of the second cam 10312 and the first shell fixing frame 1013, thereby helping to reduce the overall thickness of the rotating shaft mechanism 1.

[0167] In the embodiment of the present application, the first cam surface 103111 and the second cam surface 103121 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 103111 and the second cam surface 103121, during the closing process of the rotating shaft mechanism 1, as the first swing arm 10111 rotates, the first cam 10311 can push the second cam 10312 toward the first limit block 10314, thereby compressing the first elastic member 10313, so that the user can obtain a more obvious operating feel and improve the user's usage experience; during the unfolding process of the rotating shaft mechanism 1, the first elastic member 10313 gradually rebounds in the compressed state and releases the accumulated elastic potential energy, thereby pushing the second cam 10312 to slide toward the first cam 10311, so that the second cam 10312 can apply a torque to the first cam 10311 and the first swing arm 10111 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.

[0168] In addition, in the embodiment of the present application, the first cam surface 103111 and the second cam surface 103121 can be reasonably designed to enable the first cam 10311 and the first swing arm 10111 to hover at a set angle, that is, the first rotating assembly can hover. 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.

[0169] Can refer to again Figures 18 to 20 , similar to the structure of the first damping assembly 1031, when the second damping assembly 1032 is specifically arranged, the second damping assembly may include a third cam 10321, a fourth cam 10322, a second elastic member 10323 and a second stop block 10324. The third cam 10321 may be arranged on one side of the second swing arm 10121 along the axial direction of the shaft mechanism 1, and the side of the third cam 10321 away from the second swing arm 10121 has a third cam surface 103211; the fourth cam 10322 may be arranged on one side of the third cam 10321 away from the second swing arm 10121, and the fourth cam 10322 is slidably arranged on the second housing fixing frame along the axial direction of the shaft mechanism 1, and the side of the fourth cam 10322 facing the third cam 10321 has a third cam surface 103211. Four cam surfaces 103221; the second limit block 10324 is arranged on the side of the fourth cam 10322 away from the second swing arm 10121, and the second limit block 10324 is fixed to the second shell fixing frame; the second elastic member 10323 is limited between the fourth cam 10322 and the second limit block 10324, thereby applying elastic force to the fourth cam 10322, so that the fourth cam surface 103221 of the fourth cam 10322 abuts against the third cam surface 103211 of the third cam 10321.

[0170] In a specific implementation, the third cam 10321 and the second swing arm 10121 may be an integral structure, so that the side surface of the second swing arm 10121 forms the third cam surface 103211 of the third cam 10321. Alternatively, the third cam 10321 may also be fixed to the side surface of the second swing arm 10121 by bonding, welding or riveting.

[0171] 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, the second limiting block 10324 may be fixed in the second limiting groove, the fourth cam 10322 may be slidably arranged in the second limiting groove, and the fourth cam surface 103221 of the fourth cam 10322 may abut against the third cam surface 103211 of the third cam 10321 through the second opening. In this way, on the one hand, the second limiting groove may be used to limit the moving direction of the fourth cam 10322 driven by the second elastic member 10323, thereby improving the structural stability and reliability of the second damping assembly 1032, and on the other hand, the fourth cam 10322 may be overlapped or partially overlapped with the second housing fixing frame in the thickness direction of the rotating shaft mechanism 1, thereby reducing the thickness of the rotating shaft mechanism 1, thereby helping to achieve a lightweight design of the electronic device using the rotating shaft mechanism 1.

[0172] In one implementation, the second limit block 10324 and the second housing fixing frame may be an integral structure, for example, the groove wall of the second limit groove opposite to the side where the second opening is located may be formed as the second limit block 10324. In another implementation, the second limit block 10324 may be fixed in the second limit groove by bonding, welding or riveting, for example, it may be fixed to the side of the second limit groove opposite to the side where the second opening is located.

[0173] In an embodiment of the present application, the groove wall of the second limiting groove may be provided with a second guide groove extending along the axial direction of the rotating shaft mechanism, and the side of the fourth cam 10322 may be provided with a second guide block 103222, and the second guide block 103222 is slidably set in the second guide groove, so that the sliding direction of the fourth cam 10322 in the second limiting groove is limited by the cooperation between the second guide block 103222 and the second guide groove, and guidance is provided for the sliding of the fourth cam 10322, thereby reducing the risk of the fourth cam 10322 slipping in the second limiting groove and improving the movement stability of the fourth cam 10322.

[0174] In addition, a second avoidance groove may be further provided on the second shell fixing frame, and the second avoidance groove is connected to the second guide groove. When the fourth cam 10322 is installed in the second limiting groove, the second avoidance groove can avoid the second guide block 103222 of the fourth cam 10322, so that the second guide block 103222 of the fourth cam 10322 can smoothly enter the second guide groove, thereby reducing the difficulty of installing the fourth cam 10322 on the second shell fixing frame.

[0175] Continue to refer Figures 18 to 20In the embodiment of the present application, the second elastic member 10323 may be a spring. The number of springs may be set according to the magnitude of the damping force required to be provided by the second damping assembly 1032 and the space of the rotating shaft mechanism 1 and other parameters. The figure shows that the second elastic member 10323 includes two springs, and the two springs may be arranged in parallel between the fourth cam 10322 and the second stop block 10324. In addition, the second damping assembly 1032 may also include a second guide column 10325 respectively arranged corresponding to each spring, and the second guide column 10325 may be fixed to the side of the second stop block 10324 facing the fourth cam 10322, or may also be fixed to the side of the fourth cam 10322 facing the second stop block 10324, and the present application does not limit this. The second guide column 10325 extends along the axial direction of the rotating shaft mechanism 1, and the spring may be sleeved on the corresponding second guide column 10325, so as to reduce the risk of displacement of the spring when elastic deformation occurs.

[0176] In some other embodiments, the second elastic member 10323 may also be a spring sheet, and there may be multiple spring sheets, which may be stacked between the fourth cam 10322 and the second limiting block 10324 .

[0177] In a specific implementation, a third groove may be provided on the side of the fourth cam 10322 facing the second housing fixing frame, and a fourth groove may be provided at a position of the second housing fixing frame corresponding to the third groove. After the fourth cam 10322 is installed on the second housing fixing frame, the third groove and the fourth groove may be combined to form a space, and the second elastic member 10323 may be arranged in the space. It should be understood that when the second housing fixing frame is provided with a second limiting groove, the fourth groove may be specifically arranged on the bottom wall of the first limiting groove. With this design, the second elastic member 10323 may be limited by the space formed by the third groove and the fourth groove, and since the space is formed by the two grooves, the depths of the two grooves are relatively small, so that the thickness of the fourth cam 10322 and the second housing fixing frame may be appropriately reduced without affecting the structural strength of the fourth cam 10322 and the second housing fixing frame, thereby helping to reduce the overall thickness of the rotating shaft mechanism 1.

[0178] In the embodiment of the present application, the third cam surface 103211 and the fourth cam surface 103221 may include multiple protrusions and recessed portions. When the inclined surfaces of the protrusions of the two cam surfaces are in contact, 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 third cam surface 103211 and the fourth cam surface 103221, during the closing process of the rotating shaft mechanism 1, as the second swing arm 10121 rotates, the third cam 10321 can push the fourth cam 10322 toward the second limit block 10324, thereby compressing the second elastic member 10323, so that the user can obtain a more obvious operating feel and improve the user's usage experience; during the unfolding process of the rotating shaft mechanism 1, the second elastic member 10323 gradually rebounds in the compressed state and releases the accumulated elastic potential energy, thereby pushing the fourth cam 10322 to slide toward the third cam 10321, so that the fourth cam 10322 can apply a torque to the third cam 10321 and the second swing arm 10121 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.

[0179] In addition, in the embodiment of the present application, the third cam surface 103211 and the fourth cam surface 103221 can be reasonably designed to enable the third cam 10321 and the second swing arm 10121 to hover at a set angle, that is, the second rotating assembly can hover. When the hinge mechanism 1 is applied to electronic equipment, the electronic equipment can be positioned in some intermediate states by utilizing the hovering design of the second rotating assembly, thereby further improving the user experience.

[0180] Fig.21 A partial structural diagram of another damping module provided in an embodiment of the present application. Fig.21 As shown, in an embodiment of the present application, the damping module may also include a first damping component 1031 and a second damping component 1032. The structures of the first damping component 1031 and the second damping component 1032 may be designed with reference to the description in the aforementioned embodiments, and will not be repeated here.

[0181] Different from the above-mentioned embodiment, the number of the first damping assembly 1031 and the number of the second damping assembly 1032 in this embodiment are two respectively, wherein the two first damping assemblies 1031 can be symmetrically arranged on both sides of the first swing arm 10111 along the axial direction of the rotating shaft mechanism, so as to balance the forces on both sides of the first swing arm 10111, reduce the risk of the first swing arm 10111 getting stuck, and improve the movement reliability of the first swing arm 10111. Similarly, the two second damping assemblies 1032 can be symmetrically arranged on both sides of the second swing arm 10121 along the axial direction of the rotating shaft mechanism, so as to balance the forces on both sides of the second swing arm 10121, reduce the risk of the second swing arm 10121 getting stuck, and improve the movement reliability of the second swing arm 10121.

[0182] 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 invention comprises a main shaft, a first housing fixing frame, a second housing fixing frame, a rotating module and a damping module, wherein the first housing fixing frame and the second housing fixing frame are respectively arranged on both sides of the main shaft, wherein: The rotating module comprises a first swing arm and a second swing arm, the first swing arm is rotatably connected to the main shaft, the first swing arm is slidably connected to the first housing fixing frame, the second swing arm is rotatably connected to the main shaft, and the second swing arm is slidably connected to the second housing fixing frame; The damping module comprises a first damping component and a second damping component, the first damping component comprises a first cam, a second cam, a first elastic member and a first limit block, the first cam is arranged on one side of the first swing arm along the axial direction of the rotating shaft mechanism, 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, the cam surface of the second cam abuts against the cam surface of the first cam, the first limit block is located on the side of the second cam away from the first swing arm, and the first limit block is fixed to the first housing fixing frame, and both ends of the first elastic member are respectively connected to the second cam and abutting against the first limit block; the second damping assembly includes a third cam, a fourth cam, a second elastic member and a second limit block, the third cam being arranged on one side of the second swing arm along the axial direction of the rotating shaft mechanism, the fourth cam being located on the side of the third cam away from the second swing arm, and the fourth cam being slidably arranged on the second shell fixing frame along the axial direction of the rotating shaft mechanism, the cam surface of the fourth cam abutting against the cam surface of the third cam, the second limit block being located on the side of the fourth cam away from the second swing arm, and the second limit block being fixed to the second shell fixing frame, and the two ends of the second elastic member respectively abutting against the fourth cam and the second limit block.

2. The rotating shaft mechanism according to claim 1, characterized in that: The first housing fixing frame is provided with a first limiting groove extending along the axial direction of the rotating shaft mechanism, the first limiting groove has a first opening arranged toward the first swing arm, the first limiting block is fixed in the first limiting groove, the second cam is slidably 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 fixing frame is provided with a second limiting groove extending along the axial direction of the rotating shaft mechanism, the second limiting groove has a second opening arranged toward the second swing arm, the second limiting block is fixed in the second limiting groove, the fourth cam is slidably 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.

3. The rotating shaft mechanism according to claim 2, characterized in that: The groove wall of the first limiting groove arranged opposite to the first opening is formed as the first limiting block; A groove wall of the second limiting groove arranged opposite to the second opening is formed as the second limiting block.

4. The rotating shaft mechanism according to claim 2 or 3, characterized in that: The groove wall of the first limiting groove is provided with a first guide groove extending along the axial direction of the rotating shaft mechanism, and the second cam is provided with a first guide block, and the first guide block is slidably provided in the first guide groove; The groove wall of the second limiting groove is provided with a second guide groove extending along the axial direction of the rotating shaft mechanism, and the fourth cam is provided with a second guide block, and the second guide block is slidably arranged in the second guide groove.

5. The rotating shaft mechanism according to any one of claims 1 to 4, characterized in that: A first groove is provided on a side of the second cam facing the first housing fixing frame, a second groove is provided on the first housing fixing frame at a position corresponding to the first groove, and the first elastic member is located in a space enclosed by the first groove and the second groove; A third groove is provided on the side of the fourth cam facing the second shell fixing frame, a fourth groove is provided on the second shell fixing frame at a position corresponding to the third groove, and the second elastic member is located in a space enclosed by the third groove and the fourth groove.

6. The rotating shaft mechanism according to any one of claims 1 to 5, characterized in that: The first cam and the first swing arm are an integral structure; and / or The second cam and the second swing arm are an integral structure.

7. The rotating shaft mechanism according to any one of claims 1 to 6, characterized in that: The number of the first damping components in the damping module is two, and the two first damping components are symmetrically arranged on both sides of the first swing arm along the axial direction of the rotating shaft mechanism; The number of the second damping components in the damping module is two, and the two second damping components are symmetrically arranged on both sides of the second swing arm along the axial direction of the rotating shaft mechanism.

8. The rotating shaft mechanism according to any one of claims 1 to 7, characterized in that: The rotating module further includes a first supporting arm, a second supporting arm, a first connecting member, and a second connecting member, wherein: The first support arm is rotatably connected to the second housing fixing frame, the first connecting member is located between the first swing arm and the first support arm, the first connecting member is rotatably connected to the first swing arm, and the first connecting member is rotatably connected to the first support arm; the main shaft is provided with a first track groove, the first connecting member can move along the first track groove, so as to limit the movement track of the first connecting member through the first track groove; The second support arm is rotatably connected to the first shell fixing frame, the second connecting member is located between the second swing arm and the second support arm, the second connecting member is rotatably connected to the second swing arm, and the second connecting member is rotatably connected to the second support arm; the main shaft is provided with a second trajectory groove, and the second connecting member can move along the second trajectory groove to limit the movement trajectory of the second connecting member by the second trajectory groove.

9. The rotating shaft mechanism according to claim 8, characterized in that: The main shaft comprises a base and a cover plate, wherein the base is provided with a first arc-shaped groove and a third arc-shaped groove; the cover plate is provided on the base, and the cover plate comprises a first protrusion arranged toward the first arc-shaped groove and a third protrusion arranged toward the third arc-shaped groove; The gap between the surface of the first protrusion and the groove surface of the first arc-shaped groove serves as the first track groove, the first connecting member includes a first arc-shaped surface and a second arc-shaped surface, and when the rotating shaft mechanism is in an expanded state and a closed state, the first arc-shaped surface abuts against the surface of the first protrusion, and the second arc-shaped surface abuts against the groove surface of the first arc-shaped groove; The gap between the surface of the third protrusion and the groove surface of the third arcuate groove serves as the second trajectory groove. The second connecting member includes a third arcuate surface and a fourth arcuate surface. When the rotating shaft mechanism is in an expanded state and a closed state, the third arcuate surface abuts against the surface of the third protrusion, and the fourth arcuate surface abuts against the groove surface of the third arcuate groove.

10. The rotating shaft mechanism according to claim 9, characterized in that: When the rotating shaft mechanism changes from the expanded state to the closed state, the first arc surface abuts against the surface of the first protrusion, and a gap exists between the second arc surface and the groove surface of the first arc groove; when the rotating shaft mechanism changes from the closed state to the expanded state, the second arc surface abuts against the groove surface of the first arc groove, and a gap exists between the first arc surface and the surface of the first protrusion; During the process of the rotating shaft mechanism changing from the expanded state to the closed state, the third arcuate surface abuts against the surface of the third protrusion, and there is a gap between the fourth arcuate surface and the groove surface of the third arcuate groove; during the process of the rotating shaft mechanism changing from the closed state to the expanded state, the fourth arcuate surface abuts against the groove surface of the third arcuate groove, and there is a gap between the third arcuate surface and the surface of the third protrusion.

11. The rotating shaft mechanism according to claim 9, characterized in that: The distances between the surface of the first protrusion and the groove surface of the first arcuate groove are equal at all locations. When the rotating shaft mechanism changes from the expanded state to the closed state and from the closed state to the expanded state, the first arcuate surface abuts against the surface of the first protrusion, and the second arcuate surface abuts against the groove surface of the first arcuate groove; the distances between the surface of the third protrusion and the groove surface of the third arcuate groove are equal at all locations. When the rotating shaft mechanism changes from the expanded state to the closed state and from the closed state to the expanded state, the third arcuate surface abuts against the surface of the third protrusion, and the fourth arcuate surface abuts against the groove surface of the third arcuate groove.

12. The rotating shaft mechanism according to claim 9, characterized in that: The first arc surface is an arc surface, the second arc surface is an arc surface, and the sum of the radius of the first arc surface and the radius of the second arc surface is equal to the distance between the surface of the first protrusion and the groove surface of the first arc groove; The third arcuate surface is an arcuate surface, the fourth arcuate surface is an arcuate surface, and the sum of the radius of the third arcuate surface and the radius of the fourth arcuate surface is equal to the distance between the surface of the third protrusion and the groove surface of the third arcuate groove.

13. 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 12, 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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